From 26a029d407be480d791972afb5975cf62c9360a6 Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Fri, 19 Apr 2024 02:47:55 +0200
Subject: Adding upstream version 124.0.1.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 js/src/tests/test262/built-ins/Array/15.4.5-1.js   |   14 +
 .../tests/test262/built-ins/Array/15.4.5.1-5-1.js  |   16 +
 .../tests/test262/built-ins/Array/15.4.5.1-5-2.js  |   16 +
 .../test262/built-ins/Array/S15.4.1_A1.1_T1.js     |   25 +
 .../test262/built-ins/Array/S15.4.1_A1.1_T2.js     |   21 +
 .../test262/built-ins/Array/S15.4.1_A1.1_T3.js     |   19 +
 .../test262/built-ins/Array/S15.4.1_A1.2_T1.js     |   18 +
 .../test262/built-ins/Array/S15.4.1_A1.3_T1.js     |   17 +
 .../test262/built-ins/Array/S15.4.1_A2.1_T1.js     |   20 +
 .../test262/built-ins/Array/S15.4.1_A2.2_T1.js     |   37 +
 .../test262/built-ins/Array/S15.4.1_A3.1_T1.js     |   20 +
 .../test262/built-ins/Array/S15.4.2.1_A1.1_T1.js   |   20 +
 .../test262/built-ins/Array/S15.4.2.1_A1.1_T2.js   |   21 +
 .../test262/built-ins/Array/S15.4.2.1_A1.1_T3.js   |   18 +
 .../test262/built-ins/Array/S15.4.2.1_A1.2_T1.js   |   18 +
 .../test262/built-ins/Array/S15.4.2.1_A1.3_T1.js   |   17 +
 .../test262/built-ins/Array/S15.4.2.1_A2.1_T1.js   |   20 +
 .../test262/built-ins/Array/S15.4.2.1_A2.2_T1.js   |   37 +
 .../test262/built-ins/Array/S15.4.3_A1.1_T1.js     |   19 +
 .../test262/built-ins/Array/S15.4.3_A1.1_T2.js     |   20 +
 .../test262/built-ins/Array/S15.4.3_A1.1_T3.js     |   17 +
 .../test262/built-ins/Array/S15.4.5.1_A1.2_T2.js   |   21 +
 .../test262/built-ins/Array/S15.4.5.1_A2.1_T1.js   |   27 +
 .../test262/built-ins/Array/S15.4.5.1_A2.2_T1.js   |   22 +
 .../test262/built-ins/Array/S15.4.5.1_A2.3_T1.js   |   19 +
 .../test262/built-ins/Array/S15.4.5.2_A1_T1.js     |   28 +
 .../test262/built-ins/Array/S15.4.5.2_A1_T2.js     |   22 +
 .../test262/built-ins/Array/S15.4.5.2_A2_T1.js     |   24 +
 .../test262/built-ins/Array/S15.4.5.2_A3_T1.js     |   23 +
 .../test262/built-ins/Array/S15.4.5.2_A3_T2.js     |   32 +
 .../test262/built-ins/Array/S15.4.5.2_A3_T3.js     |   28 +
 .../test262/built-ins/Array/S15.4_A1.1_T10.js      |   25 +
 .../tests/test262/built-ins/Array/S15.4_A1.1_T4.js |   20 +
 .../tests/test262/built-ins/Array/S15.4_A1.1_T5.js |   22 +
 .../tests/test262/built-ins/Array/S15.4_A1.1_T6.js |   21 +
 .../tests/test262/built-ins/Array/S15.4_A1.1_T7.js |   24 +
 .../tests/test262/built-ins/Array/S15.4_A1.1_T8.js |   24 +
 .../tests/test262/built-ins/Array/S15.4_A1.1_T9.js |  121 ++
 .../built-ins/Array/Symbol.species/browser.js      |    0
 .../built-ins/Array/Symbol.species/length.js       |   34 +
 .../built-ins/Array/Symbol.species/return-value.js |   16 +
 .../built-ins/Array/Symbol.species/shell.js        |    0
 .../Array/Symbol.species/symbol-species-name.js    |   27 +
 .../Array/Symbol.species/symbol-species.js         |   23 +
 js/src/tests/test262/built-ins/Array/browser.js    |    0
 .../tests/test262/built-ins/Array/constructor.js   |   12 +
 .../built-ins/Array/from/Array.from-descriptor.js  |   14 +
 .../built-ins/Array/from/Array.from-name.js        |   32 +
 .../built-ins/Array/from/Array.from_arity.js       |   23 +
 .../Array.from_forwards-length-for-array-likes.js  |   41 +
 ...y-like-has-length-but-no-indexes-with-values.js |   41 +
 .../tests/test262/built-ins/Array/from/browser.js  |    0
 .../Array/from/calling-from-valid-1-noStrict.js    |   68 +
 .../from/calling-from-valid-1-onlyStrict-strict.js |   69 +
 .../built-ins/Array/from/calling-from-valid-2.js   |   69 +
 .../built-ins/Array/from/elements-added-after.js   |   40 +
 .../built-ins/Array/from/elements-deleted-after.js |   34 +
 .../built-ins/Array/from/elements-updated-after.js |   29 +
 .../test262/built-ins/Array/from/from-array.js     |   25 +
 .../test262/built-ins/Array/from/from-string.js    |   19 +
 .../built-ins/Array/from/get-iter-method-err.js    |   24 +
 .../built-ins/Array/from/items-is-arraybuffer.js   |   21 +
 .../built-ins/Array/from/items-is-null-throws.js   |   19 +
 .../test262/built-ins/Array/from/iter-adv-err.js   |   30 +
 .../built-ins/Array/from/iter-cstm-ctor-err.js     |   28 +
 .../test262/built-ins/Array/from/iter-cstm-ctor.js |   50 +
 .../built-ins/Array/from/iter-get-iter-err.js      |   24 +
 .../built-ins/Array/from/iter-get-iter-val-err.js  |   36 +
 .../built-ins/Array/from/iter-map-fn-args.js       |   73 +
 .../built-ins/Array/from/iter-map-fn-err.js        |   43 +
 .../built-ins/Array/from/iter-map-fn-return.js     |   72 +
 .../built-ins/Array/from/iter-map-fn-this-arg.js   |   59 +
 .../Array/from/iter-map-fn-this-non-strict.js      |   62 +
 .../Array/from/iter-map-fn-this-strict-strict.js   |   60 +
 .../built-ins/Array/from/iter-set-elem-prop-err.js |   54 +
 .../Array/from/iter-set-elem-prop-non-writable.js  |   45 +
 .../built-ins/Array/from/iter-set-elem-prop.js     |   60 +
 .../built-ins/Array/from/iter-set-length-err.js    |   39 +
 .../built-ins/Array/from/iter-set-length.js        |   48 +
 .../Array/from/mapfn-is-not-callable-typeerror.js  |   36 +
 .../built-ins/Array/from/mapfn-is-symbol-throws.js |   22 +
 .../built-ins/Array/from/mapfn-throws-exception.js |   20 +
 .../built-ins/Array/from/not-a-constructor.js      |   31 +
 .../built-ins/Array/from/proto-from-ctor-realm.js  |   37 +
 js/src/tests/test262/built-ins/Array/from/shell.js |    0
 .../built-ins/Array/from/source-array-boundary.js  |   30 +
 .../Array/from/source-object-constructor.js        |   17 +
 .../Array/from/source-object-iterator-1.js         |   34 +
 .../Array/from/source-object-iterator-2.js         |   39 +
 .../from/source-object-length-set-elem-prop-err.js |   54 +
 ...rce-object-length-set-elem-prop-non-writable.js |   48 +
 .../built-ins/Array/from/source-object-length.js   |   27 +
 .../built-ins/Array/from/source-object-missing.js  |   24 +
 .../built-ins/Array/from/source-object-without.js  |   20 +
 .../test262/built-ins/Array/from/this-null.js      |   14 +
 .../async-iterable-async-mapped-awaits-once.js     |   31 +
 .../async-iterable-input-does-not-await-input.js   |   39 +
 .../async-iterable-input-iteration-err.js          |   21 +
 .../Array/fromAsync/async-iterable-input.js        |   24 +
 .../fromAsync/asyncitems-array-add-to-empty.js     |   45 +
 .../fromAsync/asyncitems-array-add-to-singleton.js |   44 +
 .../Array/fromAsync/asyncitems-array-add.js        |   44 +
 .../Array/fromAsync/asyncitems-array-mutate.js     |   45 +
 .../Array/fromAsync/asyncitems-array-remove.js     |   44 +
 .../Array/fromAsync/asyncitems-arraybuffer.js      |   18 +
 .../Array/fromAsync/asyncitems-arraylike-holes.js  |   25 +
 .../asyncitems-arraylike-length-accessor-throws.js |   26 +
 .../fromAsync/asyncitems-arraylike-promise.js      |   32 +
 .../fromAsync/asyncitems-arraylike-too-long.js     |   32 +
 .../fromAsync/asyncitems-asynciterator-exists.js   |   33 +
 .../asyncitems-asynciterator-not-callable.js       |   20 +
 .../fromAsync/asyncitems-asynciterator-null.js     |   31 +
 .../fromAsync/asyncitems-asynciterator-sync.js     |   33 +
 .../fromAsync/asyncitems-asynciterator-throws.js   |   17 +
 .../built-ins/Array/fromAsync/asyncitems-bigint.js |   21 +
 .../Array/fromAsync/asyncitems-boolean.js          |   21 +
 .../Array/fromAsync/asyncitems-function.js         |   22 +
 .../Array/fromAsync/asyncitems-iterator-exists.js  |   34 +
 .../fromAsync/asyncitems-iterator-not-callable.js  |   20 +
 .../Array/fromAsync/asyncitems-iterator-null.js    |   31 +
 .../Array/fromAsync/asyncitems-iterator-promise.js |   34 +
 .../Array/fromAsync/asyncitems-iterator-throws.js  |   17 +
 .../Array/fromAsync/asyncitems-null-undefined.js   |   19 +
 .../built-ins/Array/fromAsync/asyncitems-number.js |   21 +
 .../fromAsync/asyncitems-object-not-arraylike.js   |   24 +
 .../Array/fromAsync/asyncitems-operations.js       |   31 +
 .../built-ins/Array/fromAsync/asyncitems-string.js |   17 +
 .../built-ins/Array/fromAsync/asyncitems-symbol.js |   21 +
 .../asyncitems-uses-intrinsic-iterator-symbols.js  |   41 +
 .../test262/built-ins/Array/fromAsync/browser.js   |    0
 .../test262/built-ins/Array/fromAsync/builtin.js   |   38 +
 .../test262/built-ins/Array/fromAsync/length.js    |   28 +
 .../Array/fromAsync/mapfn-async-arraylike.js       |   36 +
 .../Array/fromAsync/mapfn-async-iterable-async.js  |   36 +
 .../Array/fromAsync/mapfn-async-iterable-sync.js   |   36 +
 .../mapfn-async-throws-close-async-iterator.js     |   41 +
 .../mapfn-async-throws-close-sync-iterator.js      |   41 +
 .../Array/fromAsync/mapfn-async-throws.js          |   24 +
 .../Array/fromAsync/mapfn-not-callable.js          |   26 +
 .../mapfn-result-awaited-once-per-iteration.js     |   48 +
 .../Array/fromAsync/mapfn-sync-arraylike.js        |   36 +
 .../Array/fromAsync/mapfn-sync-iterable-async.js   |   34 +
 .../Array/fromAsync/mapfn-sync-iterable-sync.js    |   34 +
 .../mapfn-sync-throws-close-async-iterator.js      |   40 +
 .../mapfn-sync-throws-close-sync-iterator.js       |   40 +
 .../built-ins/Array/fromAsync/mapfn-sync-throws.js |   23 +
 .../test262/built-ins/Array/fromAsync/name.js      |   28 +
 ...-iterable-input-does-not-use-array-prototype.js |   47 +
 .../non-iterable-input-element-access-err.js       |   22 +
 ...ble-async-mapped-awaits-callback-result-once.js |   33 +
 ...nput-with-thenable-async-mapped-callback-err.js |   28 +
 ...iterable-input-with-thenable-element-rejects.js |   27 +
 ...input-with-thenable-sync-mapped-callback-err.js |   22 +
 .../fromAsync/non-iterable-input-with-thenable.js  |   25 +
 .../Array/fromAsync/non-iterable-input.js          |   25 +
 .../non-iterable-sync-mapped-callback-err.js       |   28 +
 .../non-iterable-with-non-promise-thenable.js      |   27 +
 ...rable-with-thenable-async-mapped-awaits-once.js |   30 +
 .../non-iterable-with-thenable-awaits-once.js      |   28 +
 ...erable-with-thenable-sync-mapped-awaits-once.js |   29 +
 .../non-iterable-with-thenable-then-method-err.js  |   25 +
 .../built-ins/Array/fromAsync/not-a-constructor.js |   19 +
 .../test262/built-ins/Array/fromAsync/prop-desc.js |   23 +
 .../returned-promise-resolves-to-array.js          |   23 +
 .../built-ins/Array/fromAsync/returns-promise.js   |   36 +
 .../test262/built-ins/Array/fromAsync/shell.js     | 2271 ++++++++++++++++++++
 ...ync-iterable-input-with-non-promise-thenable.js |   24 +
 .../fromAsync/sync-iterable-input-with-thenable.js |   18 +
 .../Array/fromAsync/sync-iterable-input.js         |   18 +
 .../Array/fromAsync/sync-iterable-iteration-err.js |   20 +
 ...rable-with-thenable-async-mapped-awaits-once.js |   26 +
 ...able-with-thenable-async-mapped-callback-err.js |   19 +
 .../sync-iterable-with-thenable-awaits-once.js     |   26 +
 .../sync-iterable-with-thenable-element-rejects.js |   22 +
 ...erable-with-thenable-sync-mapped-awaits-once.js |   26 +
 ...rable-with-thenable-sync-mapped-callback-err.js |   19 +
 .../sync-iterable-with-thenable-then-method-err.js |   24 +
 .../Array/fromAsync/this-constructor-operations.js |   74 +
 .../this-constructor-with-bad-length-setter.js     |   34 +
 .../this-constructor-with-readonly-elements.js     |   51 +
 .../this-constructor-with-readonly-length.js       |   39 +
 ...ith-unsettable-element-closes-async-iterator.js |   44 +
 ...with-unsettable-element-closes-sync-iterator.js |   44 +
 .../this-constructor-with-unsettable-element.js    |   29 +
 .../built-ins/Array/fromAsync/this-constructor.js  |   53 +
 .../Array/fromAsync/this-non-constructor.js        |   49 +
 .../built-ins/Array/fromAsync/thisarg-object.js    |   22 +
 .../Array/fromAsync/thisarg-omitted-sloppy.js      |   34 +
 .../fromAsync/thisarg-omitted-strict-strict.js     |   30 +
 .../Array/fromAsync/thisarg-primitive-sloppy.js    |   76 +
 .../fromAsync/thisarg-primitive-strict-strict.js   |   51 +
 .../test262/built-ins/Array/is-a-constructor.js    |   26 +
 .../built-ins/Array/isArray/15.4.3.2-0-1.js        |   14 +
 .../built-ins/Array/isArray/15.4.3.2-0-2.js        |   12 +
 .../built-ins/Array/isArray/15.4.3.2-0-3.js        |   12 +
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 .../built-ins/Array/isArray/15.4.3.2-0-6.js        |   12 +
 .../built-ins/Array/isArray/15.4.3.2-0-7.js        |   12 +
 .../built-ins/Array/isArray/15.4.3.2-1-1.js        |   12 +
 .../built-ins/Array/isArray/15.4.3.2-1-10.js       |   12 +
 .../built-ins/Array/isArray/15.4.3.2-1-11.js       |   12 +
 .../built-ins/Array/isArray/15.4.3.2-1-12.js       |   12 +
 .../built-ins/Array/isArray/15.4.3.2-1-13.js       |   18 +
 .../built-ins/Array/isArray/15.4.3.2-1-15.js       |   12 +
 .../built-ins/Array/isArray/15.4.3.2-1-2.js        |   12 +
 .../built-ins/Array/isArray/15.4.3.2-1-3.js        |   12 +
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 .../built-ins/Array/isArray/15.4.3.2-1-6.js        |   12 +
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 .../built-ins/Array/isArray/15.4.3.2-2-1.js        |   18 +
 .../built-ins/Array/isArray/15.4.3.2-2-2.js        |   20 +
 .../built-ins/Array/isArray/15.4.3.2-2-3.js        |   18 +
 .../test262/built-ins/Array/isArray/browser.js     |    0
 .../test262/built-ins/Array/isArray/descriptor.js  |   14 +
 .../tests/test262/built-ins/Array/isArray/name.js  |   29 +
 .../built-ins/Array/isArray/not-a-constructor.js   |   31 +
 .../built-ins/Array/isArray/proxy-revoked.js       |   30 +
 .../tests/test262/built-ins/Array/isArray/proxy.js |   32 +
 .../tests/test262/built-ins/Array/isArray/shell.js |    0
 js/src/tests/test262/built-ins/Array/length.js     |   26 +
 .../built-ins/Array/length/15.4.5.1-3.d-1.js       |   17 +
 .../built-ins/Array/length/15.4.5.1-3.d-2.js       |   17 +
 .../built-ins/Array/length/15.4.5.1-3.d-3.js       |   15 +
 .../built-ins/Array/length/S15.4.2.2_A1.1_T1.js    |   20 +
 .../built-ins/Array/length/S15.4.2.2_A1.1_T2.js    |   18 +
 .../built-ins/Array/length/S15.4.2.2_A1.1_T3.js    |   20 +
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 .../built-ins/Array/length/S15.4.5.1_A1.1_T1.js    |   47 +
 .../built-ins/Array/length/S15.4.5.1_A1.1_T2.js    |   59 +
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 .../built-ins/Array/length/S15.4.5.1_A1.3_T1.js    |   35 +
 .../built-ins/Array/length/S15.4.5.1_A1.3_T2.js    |  114 +
 .../built-ins/Array/length/S15.4.5.2_A3_T4.js      |   24 +
 .../test262/built-ins/Array/length/browser.js      |    0
 .../define-own-prop-length-coercion-order-set.js   |   48 +
 .../define-own-prop-length-coercion-order.js       |   63 +
 .../Array/length/define-own-prop-length-error.js   |   26 +
 .../define-own-prop-length-no-value-order.js       |   64 +
 .../define-own-prop-length-overflow-order.js       |   31 +
 .../define-own-prop-length-overflow-realm.js       |   23 +
 .../tests/test262/built-ins/Array/length/shell.js  |    0
 js/src/tests/test262/built-ins/Array/name.js       |   30 +
 js/src/tests/test262/built-ins/Array/of/browser.js |    0
 .../construct-this-with-the-number-of-arguments.js |   41 +
 .../Array/of/creates-a-new-array-from-arguments.js |   47 +
 .../Array/of/does-not-use-prototype-properties.js  |   32 +
 .../Array/of/does-not-use-set-for-indices.js       |   38 +
 js/src/tests/test262/built-ins/Array/of/length.js  |   23 +
 js/src/tests/test262/built-ins/Array/of/name.js    |   24 +
 .../built-ins/Array/of/not-a-constructor.js        |   31 +
 js/src/tests/test262/built-ins/Array/of/of.js      |   19 +
 .../built-ins/Array/of/proto-from-ctor-realm.js    |   35 +
 .../built-ins/Array/of/return-a-custom-instance.js |   39 +
 .../Array/of/return-a-new-array-object.js          |   42 +
 .../Array/of/return-abrupt-from-contructor.js      |   29 +
 ...return-abrupt-from-data-property-using-proxy.js |   40 +
 .../Array/of/return-abrupt-from-data-property.js   |   48 +
 .../Array/of/return-abrupt-from-setting-length.js  |   28 +
 .../test262/built-ins/Array/of/sets-length.js      |   38 +
 js/src/tests/test262/built-ins/Array/of/shell.js   |    0
 js/src/tests/test262/built-ins/Array/prop-desc.js  |   27 +
 .../Array/property-cast-boolean-primitive.js       |   22 +
 .../built-ins/Array/property-cast-nan-infinity.js  |   28 +
 .../built-ins/Array/property-cast-number.js        |   40 +
 .../built-ins/Array/proto-from-ctor-realm-one.js   |   56 +
 .../built-ins/Array/proto-from-ctor-realm-two.js   |   56 +
 .../built-ins/Array/proto-from-ctor-realm-zero.js  |   54 +
 js/src/tests/test262/built-ins/Array/proto.js      |   21 +
 .../built-ins/Array/prototype/Symbol.iterator.js   |   22 +
 .../Array/prototype/Symbol.iterator/browser.js     |    0
 .../prototype/Symbol.iterator/not-a-constructor.js |   35 +
 .../Array/prototype/Symbol.iterator/shell.js       |    0
 .../Symbol.unscopables/array-find-from-last.js     |   33 +
 .../Array/prototype/Symbol.unscopables/browser.js  |    0
 .../Symbol.unscopables/change-array-by-copy.js     |   31 +
 .../prototype/Symbol.unscopables/prop-desc.js      |   18 +
 .../Array/prototype/Symbol.unscopables/shell.js    |    0
 .../Array/prototype/Symbol.unscopables/value.js    |   82 +
 .../built-ins/Array/prototype/at/browser.js        |    0
 .../Array/prototype/at/index-argument-tointeger.js |   33 +
 ...index-non-numeric-argument-tointeger-invalid.js |   26 +
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 .../Array/prototype/filter/15.4.4.20-9-c-iii-9.js  |   20 +
 .../built-ins/Array/prototype/filter/browser.js    |    0
 .../Array/prototype/filter/call-with-boolean.js    |   21 +
 .../filter/callbackfn-resize-arraybuffer.js        |   74 +
 .../prototype/filter/create-ctor-non-object.js     |   53 +
 .../Array/prototype/filter/create-ctor-poisoned.js |   34 +
 .../Array/prototype/filter/create-non-array.js     |   36 +
 .../filter/create-proto-from-ctor-realm-array.js   |   45 +
 .../create-proto-from-ctor-realm-non-array.js      |   46 +
 .../Array/prototype/filter/create-proxy.js         |   41 +
 .../Array/prototype/filter/create-revoked-proxy.js |   46 +
 .../prototype/filter/create-species-abrupt.js      |   40 +
 .../prototype/filter/create-species-non-ctor.js    |   46 +
 .../Array/prototype/filter/create-species-null.js  |   35 +
 .../prototype/filter/create-species-poisoned.js    |   39 +
 .../Array/prototype/filter/create-species-undef.js |   36 +
 .../Array/prototype/filter/create-species.js       |   45 +
 .../built-ins/Array/prototype/filter/length.js     |   32 +
 .../built-ins/Array/prototype/filter/name.js       |   28 +
 .../Array/prototype/filter/not-a-constructor.js    |   35 +
 .../built-ins/Array/prototype/filter/prop-desc.js  |   23 +
 .../built-ins/Array/prototype/filter/shell.js      |  161 ++
 .../filter/target-array-non-extensible.js          |   44 +
 .../target-array-with-non-configurable-property.js |   46 +
 .../target-array-with-non-writable-property.js     |   39 +
 .../prototype/find/array-altered-during-loop.js    |   49 +
 .../built-ins/Array/prototype/find/browser.js      |    0
 .../Array/prototype/find/call-with-boolean.js      |   20 +
 .../find/callbackfn-resize-arraybuffer.js          |   76 +
 .../built-ins/Array/prototype/find/length.js       |   20 +
 .../test262/built-ins/Array/prototype/find/name.js |   24 +
 .../Array/prototype/find/not-a-constructor.js      |   31 +
 .../prototype/find/predicate-call-parameters.js    |   48 +
 .../find/predicate-call-this-non-strict.js         |   34 +
 .../find/predicate-call-this-strict-strict.js      |   35 +
 .../predicate-called-for-each-array-property.js    |   28 +
 .../find/predicate-is-not-callable-throws.js       |   51 +
 .../find/predicate-not-called-on-empty-array.js    |   31 +
 .../built-ins/Array/prototype/find/prop-desc.js    |   21 +
 .../find/return-abrupt-from-predicate-call.js      |   27 +
 .../prototype/find/return-abrupt-from-property.js  |   33 +
 .../return-abrupt-from-this-length-as-symbol.js    |   26 +
 .../find/return-abrupt-from-this-length.js         |   40 +
 .../prototype/find/return-abrupt-from-this.js      |   23 +
 .../return-found-value-predicate-result-is-true.js |   65 +
 ...n-undefined-if-predicate-returns-false-value.js |   55 +
 .../built-ins/Array/prototype/find/shell.js        |  161 ++
 .../findIndex/array-altered-during-loop.js         |   49 +
 .../built-ins/Array/prototype/findIndex/browser.js |    0
 .../Array/prototype/findIndex/call-with-boolean.js |   20 +
 .../findIndex/callbackfn-resize-arraybuffer.js     |   76 +
 .../built-ins/Array/prototype/findIndex/length.js  |   20 +
 .../built-ins/Array/prototype/findIndex/name.js    |   24 +
 .../Array/prototype/findIndex/not-a-constructor.js |   35 +
 .../findIndex/predicate-call-parameters.js         |   47 +
 .../findIndex/predicate-call-this-non-strict.js    |   34 +
 .../findIndex/predicate-call-this-strict-strict.js |   35 +
 .../predicate-called-for-each-array-property.js    |   28 +
 .../findIndex/predicate-is-not-callable-throws.js  |   51 +
 .../predicate-not-called-on-empty-array.js         |   37 +
 .../Array/prototype/findIndex/prop-desc.js         |   21 +
 .../findIndex/return-abrupt-from-predicate-call.js |   27 +
 .../findIndex/return-abrupt-from-property.js       |   33 +
 .../return-abrupt-from-this-length-as-symbol.js    |   27 +
 .../findIndex/return-abrupt-from-this-length.js    |   40 +
 .../prototype/findIndex/return-abrupt-from-this.js |   23 +
 .../return-index-predicate-result-is-true.js       |   65 +
 ...egative-one-if-predicate-returns-false-value.js |   55 +
 .../built-ins/Array/prototype/findIndex/shell.js   |  161 ++
 .../findLast/array-altered-during-loop.js          |   49 +
 .../built-ins/Array/prototype/findLast/browser.js  |    0
 .../Array/prototype/findLast/call-with-boolean.js  |   21 +
 .../findLast/callbackfn-resize-arraybuffer.js      |   76 +
 .../built-ins/Array/prototype/findLast/length.js   |   23 +
 .../Array/prototype/findLast/maximum-index.js      |   38 +
 .../built-ins/Array/prototype/findLast/name.js     |   27 +
 .../Array/prototype/findLast/not-a-constructor.js  |   31 +
 .../findLast/predicate-call-parameters.js          |   48 +
 .../findLast/predicate-call-this-non-strict.js     |   35 +
 .../findLast/predicate-call-this-strict-strict.js  |   36 +
 .../predicate-called-for-each-array-property.js    |   28 +
 .../findLast/predicate-is-not-callable-throws.js   |   52 +
 .../predicate-not-called-on-empty-array.js         |   32 +
 .../Array/prototype/findLast/prop-desc.js          |   24 +
 .../findLast/return-abrupt-from-predicate-call.js  |   28 +
 .../findLast/return-abrupt-from-property.js        |   35 +
 .../return-abrupt-from-this-length-as-symbol.js    |   25 +
 .../findLast/return-abrupt-from-this-length.js     |   39 +
 .../prototype/findLast/return-abrupt-from-this.js  |   23 +
 .../return-found-value-predicate-result-is-true.js |   64 +
 ...n-undefined-if-predicate-returns-false-value.js |   55 +
 .../built-ins/Array/prototype/findLast/shell.js    |  161 ++
 .../findLastIndex/array-altered-during-loop.js     |   49 +
 .../Array/prototype/findLastIndex/browser.js       |    0
 .../prototype/findLastIndex/call-with-boolean.js   |   21 +
 .../findLastIndex/callbackfn-resize-arraybuffer.js |   76 +
 .../Array/prototype/findLastIndex/length.js        |   23 +
 .../Array/prototype/findLastIndex/maximum-index.js |   38 +
 .../Array/prototype/findLastIndex/name.js          |   27 +
 .../prototype/findLastIndex/not-a-constructor.js   |   35 +
 .../findLastIndex/predicate-call-parameters.js     |   47 +
 .../predicate-call-this-non-strict.js              |   35 +
 .../predicate-call-this-strict-strict.js           |   36 +
 .../predicate-called-for-each-array-property.js    |   28 +
 .../predicate-is-not-callable-throws.js            |   52 +
 .../predicate-not-called-on-empty-array.js         |   37 +
 .../Array/prototype/findLastIndex/prop-desc.js     |   24 +
 .../return-abrupt-from-predicate-call.js           |   28 +
 .../findLastIndex/return-abrupt-from-property.js   |   33 +
 .../return-abrupt-from-this-length-as-symbol.js    |   25 +
 .../return-abrupt-from-this-length.js              |   39 +
 .../findLastIndex/return-abrupt-from-this.js       |   23 +
 .../return-index-predicate-result-is-true.js       |   64 +
 ...egative-one-if-predicate-returns-false-value.js |   55 +
 .../Array/prototype/findLastIndex/shell.js         |  161 ++
 .../Array/prototype/flat/array-like-objects.js     |   33 +
 .../Array/prototype/flat/bound-function-call.js    |   19 +
 .../built-ins/Array/prototype/flat/browser.js      |    0
 .../Array/prototype/flat/call-with-boolean.js      |   13 +
 .../Array/prototype/flat/empty-array-elements.js   |   26 +
 .../Array/prototype/flat/empty-object-elements.js  |   24 +
 .../built-ins/Array/prototype/flat/length.js       |   23 +
 .../test262/built-ins/Array/prototype/flat/name.js |   24 +
 .../flat/non-numeric-depth-should-not-throw.js     |   45 +
 .../Array/prototype/flat/non-object-ctor-throws.js |   37 +
 .../Array/prototype/flat/not-a-constructor.js      |   31 +
 .../prototype/flat/null-undefined-elements.js      |   34 +
 .../prototype/flat/null-undefined-input-throws.js  |   24 +
 .../Array/prototype/flat/positive-infinity.js      |   14 +
 .../built-ins/Array/prototype/flat/prop-desc.js    |   24 +
 .../Array/prototype/flat/proxy-access-count.js     |   38 +
 .../built-ins/Array/prototype/flat/shell.js        |    0
 .../flat/symbol-object-create-null-depth-throws.js |   20 +
 .../prototype/flat/target-array-non-extensible.js  |   50 +
 .../target-array-with-non-configurable-property.js |   50 +
 .../target-array-with-non-writable-property.js     |   52 +
 .../prototype/flatMap/array-like-objects-nested.js |   74 +
 .../flatMap/array-like-objects-poisoned-length.js  |   62 +
 .../flatMap/array-like-objects-typedarrays.js      |   52 +
 .../Array/prototype/flatMap/array-like-objects.js  |   87 +
 .../prototype/flatMap/bound-function-argument.js   |   16 +
 .../built-ins/Array/prototype/flatMap/browser.js   |    0
 .../Array/prototype/flatMap/call-with-boolean.js   |   21 +
 .../Array/prototype/flatMap/depth-always-one.js    |   25 +
 .../built-ins/Array/prototype/flatMap/length.js    |   23 +
 .../built-ins/Array/prototype/flatMap/name.js      |   23 +
 .../flatMap/non-callable-argument-throws.js        |   52 +
 .../Array/prototype/flatMap/not-a-constructor.js   |   35 +
 .../built-ins/Array/prototype/flatMap/prop-desc.js |   29 +
 .../Array/prototype/flatMap/proxy-access-count.js  |   44 +
 .../built-ins/Array/prototype/flatMap/shell.js     |    0
 .../flatMap/target-array-non-extensible.js         |   50 +
 .../target-array-with-non-configurable-property.js |   54 +
 .../target-array-with-non-writable-property.js     |   56 +
 .../flatMap/this-value-ctor-non-object.js          |   84 +
 .../this-value-ctor-object-species-bad-throws.js   |  139 ++
 ...r-object-species-custom-ctor-poisoned-throws.js |   60 +
 .../this-value-ctor-object-species-custom-ctor.js  |   96 +
 .../flatMap/this-value-ctor-object-species.js      |  159 ++
 .../flatMap/this-value-null-undefined-throws.js    |   27 +
 .../prototype/flatMap/thisArg-argument-strict.js   |   48 +
 .../Array/prototype/forEach/15.4.4.18-1-1.js       |   14 +
 .../Array/prototype/forEach/15.4.4.18-1-10.js      |   21 +
 .../Array/prototype/forEach/15.4.4.18-1-11.js      |   23 +
 .../Array/prototype/forEach/15.4.4.18-1-12.js      |   23 +
 .../Array/prototype/forEach/15.4.4.18-1-13.js      |   21 +
 .../Array/prototype/forEach/15.4.4.18-1-14.js      |   23 +
 .../Array/prototype/forEach/15.4.4.18-1-15.js      |   23 +
 .../Array/prototype/forEach/15.4.4.18-1-2.js       |   14 +
 .../Array/prototype/forEach/15.4.4.18-1-3.js       |   22 +
 .../Array/prototype/forEach/15.4.4.18-1-4.js       |   24 +
 .../Array/prototype/forEach/15.4.4.18-1-5.js       |   22 +
 .../Array/prototype/forEach/15.4.4.18-1-6.js       |   24 +
 .../Array/prototype/forEach/15.4.4.18-1-7.js       |   19 +
 .../Array/prototype/forEach/15.4.4.18-1-8.js       |   20 +
 .../Array/prototype/forEach/15.4.4.18-1-9.js       |   25 +
 .../Array/prototype/forEach/15.4.4.18-2-1.js       |   28 +
 .../Array/prototype/forEach/15.4.4.18-2-10.js      |   38 +
 .../Array/prototype/forEach/15.4.4.18-2-11.js      |   30 +
 .../Array/prototype/forEach/15.4.4.18-2-12.js      |   38 +
 .../Array/prototype/forEach/15.4.4.18-2-13.js      |   34 +
 .../Array/prototype/forEach/15.4.4.18-2-14.js      |   26 +
 .../Array/prototype/forEach/15.4.4.18-2-17.js      |   25 +
 .../Array/prototype/forEach/15.4.4.18-2-18.js      |   23 +
 .../Array/prototype/forEach/15.4.4.18-2-19.js      |   28 +
 .../Array/prototype/forEach/15.4.4.18-2-2.js       |   19 +
 .../Array/prototype/forEach/15.4.4.18-2-3.js       |   34 +
 .../Array/prototype/forEach/15.4.4.18-2-4.js       |   24 +
 .../Array/prototype/forEach/15.4.4.18-2-5.js       |   42 +
 .../Array/prototype/forEach/15.4.4.18-2-6.js       |   33 +
 .../Array/prototype/forEach/15.4.4.18-2-7.js       |   34 +
 .../Array/prototype/forEach/15.4.4.18-2-8.js       |   41 +
 .../Array/prototype/forEach/15.4.4.18-2-9.js       |   47 +
 .../Array/prototype/forEach/15.4.4.18-3-1.js       |   25 +
 .../Array/prototype/forEach/15.4.4.18-3-10.js      |   26 +
 .../Array/prototype/forEach/15.4.4.18-3-11.js      |   28 +
 .../Array/prototype/forEach/15.4.4.18-3-12.js      |   28 +
 .../Array/prototype/forEach/15.4.4.18-3-13.js      |   27 +
 .../Array/prototype/forEach/15.4.4.18-3-14.js      |   25 +
 .../Array/prototype/forEach/15.4.4.18-3-15.js      |   28 +
 .../Array/prototype/forEach/15.4.4.18-3-16.js      |   28 +
 .../Array/prototype/forEach/15.4.4.18-3-17.js      |   28 +
 .../Array/prototype/forEach/15.4.4.18-3-18.js      |   27 +
 .../Array/prototype/forEach/15.4.4.18-3-19.js      |   32 +
 .../Array/prototype/forEach/15.4.4.18-3-2.js       |   28 +
 .../Array/prototype/forEach/15.4.4.18-3-20.js      |   32 +
 .../Array/prototype/forEach/15.4.4.18-3-21.js      |   42 +
 .../Array/prototype/forEach/15.4.4.18-3-22.js      |   41 +
 .../Array/prototype/forEach/15.4.4.18-3-23.js      |   50 +
 .../Array/prototype/forEach/15.4.4.18-3-24.js      |   28 +
 .../Array/prototype/forEach/15.4.4.18-3-25.js      |   28 +
 .../Array/prototype/forEach/15.4.4.18-3-3.js       |   28 +
 .../Array/prototype/forEach/15.4.4.18-3-4.js       |   27 +
 .../Array/prototype/forEach/15.4.4.18-3-5.js       |   27 +
 .../Array/prototype/forEach/15.4.4.18-3-6.js       |   28 +
 .../Array/prototype/forEach/15.4.4.18-3-7.js       |   28 +
 .../Array/prototype/forEach/15.4.4.18-3-9.js       |   27 +
 .../Array/prototype/forEach/15.4.4.18-4-1.js       |   15 +
 .../Array/prototype/forEach/15.4.4.18-4-10.js      |   28 +
 .../Array/prototype/forEach/15.4.4.18-4-11.js      |   32 +
 .../Array/prototype/forEach/15.4.4.18-4-12.js      |   20 +
 .../Array/prototype/forEach/15.4.4.18-4-15.js      |   39 +
 .../Array/prototype/forEach/15.4.4.18-4-2.js       |   17 +
 .../Array/prototype/forEach/15.4.4.18-4-3.js       |   15 +
 .../Array/prototype/forEach/15.4.4.18-4-4.js       |   15 +
 .../Array/prototype/forEach/15.4.4.18-4-5.js       |   15 +
 .../Array/prototype/forEach/15.4.4.18-4-6.js       |   15 +
 .../Array/prototype/forEach/15.4.4.18-4-7.js       |   16 +
 .../Array/prototype/forEach/15.4.4.18-4-8.js       |   30 +
 .../Array/prototype/forEach/15.4.4.18-4-9.js       |   34 +
 .../Array/prototype/forEach/15.4.4.18-5-1-s.js     |   22 +
 .../Array/prototype/forEach/15.4.4.18-5-1.js       |   24 +
 .../Array/prototype/forEach/15.4.4.18-5-10.js      |   20 +
 .../Array/prototype/forEach/15.4.4.18-5-11.js      |   20 +
 .../Array/prototype/forEach/15.4.4.18-5-12.js      |   20 +
 .../Array/prototype/forEach/15.4.4.18-5-13.js      |   20 +
 .../Array/prototype/forEach/15.4.4.18-5-14.js      |   19 +
 .../Array/prototype/forEach/15.4.4.18-5-15.js      |   20 +
 .../Array/prototype/forEach/15.4.4.18-5-16.js      |   20 +
 .../Array/prototype/forEach/15.4.4.18-5-17.js      |   19 +
 .../Array/prototype/forEach/15.4.4.18-5-18.js      |   20 +
 .../Array/prototype/forEach/15.4.4.18-5-19.js      |   26 +
 .../Array/prototype/forEach/15.4.4.18-5-2.js       |   24 +
 .../Array/prototype/forEach/15.4.4.18-5-21.js      |   20 +
 .../Array/prototype/forEach/15.4.4.18-5-22.js      |   19 +
 .../Array/prototype/forEach/15.4.4.18-5-23.js      |   19 +
 .../Array/prototype/forEach/15.4.4.18-5-24.js      |   19 +
 .../Array/prototype/forEach/15.4.4.18-5-25.js      |   25 +
 .../Array/prototype/forEach/15.4.4.18-5-3.js       |   24 +
 .../Array/prototype/forEach/15.4.4.18-5-4.js       |   27 +
 .../Array/prototype/forEach/15.4.4.18-5-5.js       |   26 +
 .../Array/prototype/forEach/15.4.4.18-5-6.js       |   25 +
 .../Array/prototype/forEach/15.4.4.18-5-7.js       |   19 +
 .../Array/prototype/forEach/15.4.4.18-5-9.js       |   20 +
 .../Array/prototype/forEach/15.4.4.18-7-1.js       |   25 +
 .../Array/prototype/forEach/15.4.4.18-7-2.js       |   25 +
 .../Array/prototype/forEach/15.4.4.18-7-3.js       |   24 +
 .../Array/prototype/forEach/15.4.4.18-7-4.js       |   26 +
 .../Array/prototype/forEach/15.4.4.18-7-5.js       |   27 +
 .../Array/prototype/forEach/15.4.4.18-7-7.js       |   25 +
 .../Array/prototype/forEach/15.4.4.18-7-8.js       |   25 +
 .../Array/prototype/forEach/15.4.4.18-7-9.js       |   35 +
 .../Array/prototype/forEach/15.4.4.18-7-b-1.js     |   24 +
 .../Array/prototype/forEach/15.4.4.18-7-b-10.js    |   40 +
 .../Array/prototype/forEach/15.4.4.18-7-b-11.js    |   37 +
 .../Array/prototype/forEach/15.4.4.18-7-b-12.js    |   39 +
 .../Array/prototype/forEach/15.4.4.18-7-b-13.js    |   33 +
 .../Array/prototype/forEach/15.4.4.18-7-b-14.js    |   36 +
 .../Array/prototype/forEach/15.4.4.18-7-b-15.js    |   39 +
 .../Array/prototype/forEach/15.4.4.18-7-b-16.js    |   41 +
 .../Array/prototype/forEach/15.4.4.18-7-b-2.js     |   33 +
 .../Array/prototype/forEach/15.4.4.18-7-b-3.js     |   38 +
 .../Array/prototype/forEach/15.4.4.18-7-b-4.js     |   40 +
 .../Array/prototype/forEach/15.4.4.18-7-b-5.js     |   38 +
 .../Array/prototype/forEach/15.4.4.18-7-b-6.js     |   40 +
 .../Array/prototype/forEach/15.4.4.18-7-b-7.js     |   38 +
 .../Array/prototype/forEach/15.4.4.18-7-b-8.js     |   45 +
 .../Array/prototype/forEach/15.4.4.18-7-b-9.js     |   43 +
 .../Array/prototype/forEach/15.4.4.18-7-c-i-1.js   |   29 +
 .../Array/prototype/forEach/15.4.4.18-7-c-i-10.js  |   32 +
 .../Array/prototype/forEach/15.4.4.18-7-c-i-11.js  |   41 +
 .../Array/prototype/forEach/15.4.4.18-7-c-i-12.js  |   34 +
 .../Array/prototype/forEach/15.4.4.18-7-c-i-13.js  |   47 +
 .../Array/prototype/forEach/15.4.4.18-7-c-i-14.js  |   39 +
 .../Array/prototype/forEach/15.4.4.18-7-c-i-15.js  |   38 +
 .../Array/prototype/forEach/15.4.4.18-7-c-i-16.js  |   30 +
 .../Array/prototype/forEach/15.4.4.18-7-c-i-17.js  |   31 +
 .../Array/prototype/forEach/15.4.4.18-7-c-i-18.js  |   30 +
 .../Array/prototype/forEach/15.4.4.18-7-c-i-19.js  |   40 +
 .../Array/prototype/forEach/15.4.4.18-7-c-i-2.js   |   23 +
 .../Array/prototype/forEach/15.4.4.18-7-c-i-20.js  |   38 +
 .../Array/prototype/forEach/15.4.4.18-7-c-i-21.js  |   35 +
 .../Array/prototype/forEach/15.4.4.18-7-c-i-22.js  |   28 +
 .../Array/prototype/forEach/15.4.4.18-7-c-i-25.js  |   28 +
 .../Array/prototype/forEach/15.4.4.18-7-c-i-26.js  |   37 +
 .../Array/prototype/forEach/15.4.4.18-7-c-i-27.js  |   39 +
 .../Array/prototype/forEach/15.4.4.18-7-c-i-28.js  |   44 +
 .../Array/prototype/forEach/15.4.4.18-7-c-i-29.js  |   46 +
 .../Array/prototype/forEach/15.4.4.18-7-c-i-3.js   |   35 +
 .../Array/prototype/forEach/15.4.4.18-7-c-i-30.js  |   44 +
 .../Array/prototype/forEach/15.4.4.18-7-c-i-31.js  |   42 +
 .../Array/prototype/forEach/15.4.4.18-7-c-i-4.js   |   25 +
 .../Array/prototype/forEach/15.4.4.18-7-c-i-5.js   |   43 +
 .../Array/prototype/forEach/15.4.4.18-7-c-i-6.js   |   30 +
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 .../Array/prototype/forEach/15.4.4.18-7-c-i-8.js   |   25 +
 .../Array/prototype/forEach/15.4.4.18-7-c-i-9.js   |   35 +
 .../Array/prototype/forEach/15.4.4.18-7-c-ii-1.js  |   26 +
 .../Array/prototype/forEach/15.4.4.18-7-c-ii-10.js |   21 +
 .../Array/prototype/forEach/15.4.4.18-7-c-ii-11.js |   21 +
 .../Array/prototype/forEach/15.4.4.18-7-c-ii-12.js |   21 +
 .../Array/prototype/forEach/15.4.4.18-7-c-ii-13.js |   19 +
 .../Array/prototype/forEach/15.4.4.18-7-c-ii-16.js |   26 +
 .../Array/prototype/forEach/15.4.4.18-7-c-ii-17.js |   26 +
 .../Array/prototype/forEach/15.4.4.18-7-c-ii-18.js |   26 +
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 .../Array/prototype/forEach/S15.4.4.18_A2.js       |   17 +
 .../built-ins/Array/prototype/forEach/browser.js   |    0
 .../Array/prototype/forEach/call-with-boolean.js   |   20 +
 .../forEach/callbackfn-resize-arraybuffer.js       |   72 +
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 .../built-ins/Array/prototype/forEach/prop-desc.js |   23 +
 .../built-ins/Array/prototype/forEach/shell.js     |  161 ++
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 .../Array/prototype/includes/call-with-boolean.js  |   17 +
 ...mIndex-equal-or-greater-length-returns-false.js |   26 +
 .../Array/prototype/includes/fromIndex-infinity.js |   37 +
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 .../built-ins/Array/prototype/includes/get-prop.js |   48 +
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 ...ls-only-has-on-prototype-after-length-zeroed.js |   45 +
 .../prototype/indexOf/fromindex-zero-conversion.js |   18 +
 .../prototype/indexOf/length-near-integer-limit.js |   37 +
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 .../built-ins/Array/prototype/map/15.4.4.19-4-9.js |   34 +
 .../Array/prototype/map/15.4.4.19-5-1-s.js         |   22 +
 .../built-ins/Array/prototype/map/15.4.4.19-5-1.js |   25 +
 .../Array/prototype/map/15.4.4.19-5-10.js          |   19 +
 .../Array/prototype/map/15.4.4.19-5-11.js          |   19 +
 .../Array/prototype/map/15.4.4.19-5-12.js          |   19 +
 .../Array/prototype/map/15.4.4.19-5-13.js          |   19 +
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 .../Array/prototype/map/15.4.4.19-5-18.js          |   19 +
 .../Array/prototype/map/15.4.4.19-5-19.js          |   23 +
 .../built-ins/Array/prototype/map/15.4.4.19-5-2.js |   23 +
 .../Array/prototype/map/15.4.4.19-5-21.js          |   19 +
 .../Array/prototype/map/15.4.4.19-5-22.js          |   17 +
 .../Array/prototype/map/15.4.4.19-5-23.js          |   17 +
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 .../built-ins/Array/prototype/map/15.4.4.19-5-3.js |   23 +
 .../built-ins/Array/prototype/map/15.4.4.19-5-4.js |   27 +
 .../built-ins/Array/prototype/map/15.4.4.19-5-5.js |   25 +
 .../built-ins/Array/prototype/map/15.4.4.19-5-6.js |   24 +
 .../built-ins/Array/prototype/map/15.4.4.19-5-7.js |   17 +
 .../built-ins/Array/prototype/map/15.4.4.19-5-9.js |   19 +
 .../built-ins/Array/prototype/map/15.4.4.19-6-1.js |   15 +
 .../built-ins/Array/prototype/map/15.4.4.19-6-2.js |   13 +
 .../built-ins/Array/prototype/map/15.4.4.19-8-1.js |   23 +
 .../built-ins/Array/prototype/map/15.4.4.19-8-2.js |   26 +
 .../built-ins/Array/prototype/map/15.4.4.19-8-3.js |   27 +
 .../built-ins/Array/prototype/map/15.4.4.19-8-4.js |   27 +
 .../built-ins/Array/prototype/map/15.4.4.19-8-5.js |   28 +
 .../built-ins/Array/prototype/map/15.4.4.19-8-6.js |   29 +
 .../built-ins/Array/prototype/map/15.4.4.19-8-7.js |   25 +
 .../built-ins/Array/prototype/map/15.4.4.19-8-8.js |   29 +
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 .../Array/prototype/map/15.4.4.19-8-b-1.js         |   26 +
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 .../Array/prototype/map/15.4.4.19-8-b-13.js        |   33 +
 .../Array/prototype/map/15.4.4.19-8-b-14.js        |   29 +
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 .../Array/prototype/map/15.4.4.19-8-c-i-1.js       |   29 +
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 .../Array/prototype/map/15.4.4.19-8-c-i-27.js      |   35 +
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 .../Array/prototype/map/15.4.4.19-8-c-i-3.js       |   35 +
 .../Array/prototype/map/15.4.4.19-8-c-i-30.js      |   44 +
 .../Array/prototype/map/15.4.4.19-8-c-i-31.js      |   42 +
 .../Array/prototype/map/15.4.4.19-8-c-i-4.js       |   26 +
 .../Array/prototype/map/15.4.4.19-8-c-i-5.js       |   44 +
 .../Array/prototype/map/15.4.4.19-8-c-i-6.js       |   31 +
 .../Array/prototype/map/15.4.4.19-8-c-i-7.js       |   34 +
 .../Array/prototype/map/15.4.4.19-8-c-i-8.js       |   24 +
 .../Array/prototype/map/15.4.4.19-8-c-i-9.js       |   35 +
 .../Array/prototype/map/15.4.4.19-8-c-ii-1.js      |   27 +
 .../Array/prototype/map/15.4.4.19-8-c-ii-10.js     |   17 +
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 .../Array/prototype/map/15.4.4.19-8-c-ii-12.js     |   17 +
 .../Array/prototype/map/15.4.4.19-8-c-ii-13.js     |   19 +
 .../Array/prototype/map/15.4.4.19-8-c-ii-16.js     |   24 +
 .../Array/prototype/map/15.4.4.19-8-c-ii-17.js     |   24 +
 .../Array/prototype/map/15.4.4.19-8-c-ii-18.js     |   24 +
 .../Array/prototype/map/15.4.4.19-8-c-ii-19.js     |   32 +
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 .../Array/prototype/map/15.4.4.19-8-c-iii-1.js     |   29 +
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 .../Array/prototype/map/15.4.4.19-8-c-iii-4.js     |   33 +
 .../Array/prototype/map/15.4.4.19-8-c-iii-5.js     |   28 +
 .../built-ins/Array/prototype/map/15.4.4.19-9-1.js |   24 +
 .../Array/prototype/map/15.4.4.19-9-10.js          |   31 +
 .../Array/prototype/map/15.4.4.19-9-11.js          |   36 +
 .../Array/prototype/map/15.4.4.19-9-12.js          |   37 +
 .../Array/prototype/map/15.4.4.19-9-13.js          |   28 +
 .../built-ins/Array/prototype/map/15.4.4.19-9-2.js |   24 +
 .../built-ins/Array/prototype/map/15.4.4.19-9-3.js |   22 +
 .../built-ins/Array/prototype/map/15.4.4.19-9-4.js |   23 +
 .../built-ins/Array/prototype/map/15.4.4.19-9-5.js |   25 +
 .../built-ins/Array/prototype/map/15.4.4.19-9-6.js |   24 +
 .../built-ins/Array/prototype/map/15.4.4.19-9-7.js |   27 +
 .../built-ins/Array/prototype/map/15.4.4.19-9-8.js |   27 +
 .../built-ins/Array/prototype/map/15.4.4.19-9-9.js |   27 +
 .../built-ins/Array/prototype/map/browser.js       |    0
 .../Array/prototype/map/call-with-boolean.js       |   21 +
 .../prototype/map/callbackfn-resize-arraybuffer.js |   78 +
 .../Array/prototype/map/create-ctor-non-object.js  |   53 +
 .../Array/prototype/map/create-ctor-poisoned.js    |   34 +
 .../prototype/map/create-non-array-invalid-len.js  |   41 +
 .../Array/prototype/map/create-non-array.js        |   35 +
 .../map/create-proto-from-ctor-realm-array.js      |   45 +
 .../map/create-proto-from-ctor-realm-non-array.js  |   46 +
 .../built-ins/Array/prototype/map/create-proxy.js  |   41 +
 .../Array/prototype/map/create-revoked-proxy.js    |   46 +
 .../Array/prototype/map/create-species-abrupt.js   |   40 +
 .../Array/prototype/map/create-species-non-ctor.js |   46 +
 .../Array/prototype/map/create-species-null.js     |   35 +
 .../Array/prototype/map/create-species-poisoned.js |   39 +
 .../map/create-species-undef-invalid-len.js        |   61 +
 .../Array/prototype/map/create-species-undef.js    |   36 +
 .../Array/prototype/map/create-species.js          |   45 +
 .../built-ins/Array/prototype/map/length.js        |   30 +
 .../test262/built-ins/Array/prototype/map/name.js  |   28 +
 .../Array/prototype/map/not-a-constructor.js       |   31 +
 .../built-ins/Array/prototype/map/prop-desc.js     |   23 +
 .../test262/built-ins/Array/prototype/map/shell.js |  161 ++
 .../prototype/map/target-array-non-extensible.js   |   41 +
 .../target-array-with-non-configurable-property.js |   43 +
 .../map/target-array-with-non-writable-property.js |   38 +
 .../Array/prototype/methods-called-as-functions.js |  205 ++
 .../Array/prototype/pop/S15.4.4.6_A1.1_T1.js       |   33 +
 .../Array/prototype/pop/S15.4.4.6_A1.2_T1.js       |   60 +
 .../Array/prototype/pop/S15.4.4.6_A2_T1.js         |   49 +
 .../Array/prototype/pop/S15.4.4.6_A2_T2.js         |   81 +
 .../Array/prototype/pop/S15.4.4.6_A2_T3.js         |   37 +
 .../Array/prototype/pop/S15.4.4.6_A2_T4.js         |  126 ++
 .../Array/prototype/pop/S15.4.4.6_A3_T1.js         |   33 +
 .../Array/prototype/pop/S15.4.4.6_A3_T2.js         |   33 +
 .../Array/prototype/pop/S15.4.4.6_A3_T3.js         |   28 +
 .../Array/prototype/pop/S15.4.4.6_A4_T1.js         |   50 +
 .../Array/prototype/pop/S15.4.4.6_A4_T2.js         |   51 +
 .../built-ins/Array/prototype/pop/browser.js       |    0
 .../Array/prototype/pop/call-with-boolean.js       |   12 +
 .../Array/prototype/pop/clamps-to-integer-limit.js |   38 +
 .../prototype/pop/length-near-integer-limit.js     |   46 +
 .../built-ins/Array/prototype/pop/length.js        |   30 +
 .../test262/built-ins/Array/prototype/pop/name.js  |   28 +
 .../Array/prototype/pop/not-a-constructor.js       |   31 +
 .../built-ins/Array/prototype/pop/prop-desc.js     |   23 +
 .../prototype/pop/set-length-array-is-frozen.js    |   49 +
 .../pop/set-length-array-length-is-non-writable.js |   49 +
 .../pop/set-length-zero-array-is-frozen.js         |   34 +
 ...set-length-zero-array-length-is-non-writable.js |   34 +
 .../test262/built-ins/Array/prototype/pop/shell.js |    0
 .../prototype/pop/throws-with-string-receiver.js   |   31 +
 .../test262/built-ins/Array/prototype/prop-desc.js |   22 +
 .../test262/built-ins/Array/prototype/proto.js     |   17 +
 .../Array/prototype/push/S15.4.4.7_A1_T1.js        |   45 +
 .../Array/prototype/push/S15.4.4.7_A1_T2.js        |   52 +
 .../Array/prototype/push/S15.4.4.7_A2_T1.js        |   61 +
 .../Array/prototype/push/S15.4.4.7_A2_T2.js        |  101 +
 .../Array/prototype/push/S15.4.4.7_A2_T3.js        |  120 ++
 .../built-ins/Array/prototype/push/S15.4.4.7_A3.js |   30 +
 .../Array/prototype/push/S15.4.4.7_A4_T1.js        |   60 +
 .../Array/prototype/push/S15.4.4.7_A4_T2.js        |   35 +
 .../Array/prototype/push/S15.4.4.7_A4_T3.js        |   47 +
 .../Array/prototype/push/S15.4.4.7_A5_T1.js        |   42 +
 .../built-ins/Array/prototype/push/browser.js      |    0
 .../Array/prototype/push/call-with-boolean.js      |   12 +
 .../prototype/push/clamps-to-integer-limit.js      |   38 +
 .../push/length-near-integer-limit-set-failure.js  |   49 +
 .../prototype/push/length-near-integer-limit.js    |   42 +
 .../built-ins/Array/prototype/push/length.js       |   34 +
 .../test262/built-ins/Array/prototype/push/name.js |   28 +
 .../Array/prototype/push/not-a-constructor.js      |   31 +
 .../built-ins/Array/prototype/push/prop-desc.js    |   23 +
 .../prototype/push/set-length-array-is-frozen.js   |   47 +
 .../set-length-array-length-is-non-writable.js     |   47 +
 .../push/set-length-zero-array-is-frozen.js        |   38 +
 ...set-length-zero-array-length-is-non-writable.js |   38 +
 .../built-ins/Array/prototype/push/shell.js        |    0
 .../push/throws-if-integer-limit-exceeded.js       |   41 +
 .../prototype/push/throws-with-string-receiver.js  |   38 +
 .../Array/prototype/reduce/15.4.4.21-1-1.js        |   14 +
 .../Array/prototype/reduce/15.4.4.21-1-10.js       |   18 +
 .../Array/prototype/reduce/15.4.4.21-1-11.js       |   19 +
 .../Array/prototype/reduce/15.4.4.21-1-12.js       |   19 +
 .../Array/prototype/reduce/15.4.4.21-1-13.js       |   18 +
 .../Array/prototype/reduce/15.4.4.21-1-14.js       |   19 +
 .../Array/prototype/reduce/15.4.4.21-1-15.js       |   19 +
 .../Array/prototype/reduce/15.4.4.21-1-2.js        |   14 +
 .../Array/prototype/reduce/15.4.4.21-1-3.js        |   18 +
 .../Array/prototype/reduce/15.4.4.21-1-4.js        |   20 +
 .../Array/prototype/reduce/15.4.4.21-1-5.js        |   18 +
 .../Array/prototype/reduce/15.4.4.21-1-6.js        |   20 +
 .../Array/prototype/reduce/15.4.4.21-1-7.js        |   15 +
 .../Array/prototype/reduce/15.4.4.21-1-8.js        |   17 +
 .../Array/prototype/reduce/15.4.4.21-1-9.js        |   21 +
 .../Array/prototype/reduce/15.4.4.21-10-1.js       |   24 +
 .../Array/prototype/reduce/15.4.4.21-10-2.js       |   19 +
 .../Array/prototype/reduce/15.4.4.21-10-3.js       |   18 +
 .../Array/prototype/reduce/15.4.4.21-10-4.js       |   20 +
 .../Array/prototype/reduce/15.4.4.21-10-5.js       |   19 +
 .../Array/prototype/reduce/15.4.4.21-10-6.js       |   22 +
 .../Array/prototype/reduce/15.4.4.21-10-7.js       |   22 +
 .../Array/prototype/reduce/15.4.4.21-10-8.js       |   23 +
 .../Array/prototype/reduce/15.4.4.21-2-1.js        |   24 +
 .../Array/prototype/reduce/15.4.4.21-2-10.js       |   34 +
 .../Array/prototype/reduce/15.4.4.21-2-11.js       |   29 +
 .../Array/prototype/reduce/15.4.4.21-2-12.js       |   37 +
 .../Array/prototype/reduce/15.4.4.21-2-13.js       |   33 +
 .../Array/prototype/reduce/15.4.4.21-2-14.js       |   25 +
 .../Array/prototype/reduce/15.4.4.21-2-17.js       |   22 +
 .../Array/prototype/reduce/15.4.4.21-2-18.js       |   19 +
 .../Array/prototype/reduce/15.4.4.21-2-19.js       |   24 +
 .../Array/prototype/reduce/15.4.4.21-2-2.js        |   15 +
 .../Array/prototype/reduce/15.4.4.21-2-3.js        |   30 +
 .../Array/prototype/reduce/15.4.4.21-2-4.js        |   22 +
 .../Array/prototype/reduce/15.4.4.21-2-5.js        |   38 +
 .../Array/prototype/reduce/15.4.4.21-2-6.js        |   29 +
 .../Array/prototype/reduce/15.4.4.21-2-7.js        |   30 +
 .../Array/prototype/reduce/15.4.4.21-2-8.js        |   37 +
 .../Array/prototype/reduce/15.4.4.21-2-9.js        |   43 +
 .../Array/prototype/reduce/15.4.4.21-3-1.js        |   25 +
 .../Array/prototype/reduce/15.4.4.21-3-10.js       |   26 +
 .../Array/prototype/reduce/15.4.4.21-3-11.js       |   23 +
 .../Array/prototype/reduce/15.4.4.21-3-12.js       |   23 +
 .../Array/prototype/reduce/15.4.4.21-3-13.js       |   23 +
 .../Array/prototype/reduce/15.4.4.21-3-14.js       |   24 +
 .../Array/prototype/reduce/15.4.4.21-3-15.js       |   23 +
 .../Array/prototype/reduce/15.4.4.21-3-16.js       |   23 +
 .../Array/prototype/reduce/15.4.4.21-3-17.js       |   23 +
 .../Array/prototype/reduce/15.4.4.21-3-18.js       |   26 +
 .../Array/prototype/reduce/15.4.4.21-3-19.js       |   27 +
 .../Array/prototype/reduce/15.4.4.21-3-2.js        |   23 +
 .../Array/prototype/reduce/15.4.4.21-3-20.js       |   27 +
 .../Array/prototype/reduce/15.4.4.21-3-21.js       |   38 +
 .../Array/prototype/reduce/15.4.4.21-3-22.js       |   43 +
 .../Array/prototype/reduce/15.4.4.21-3-23.js       |   45 +
 .../Array/prototype/reduce/15.4.4.21-3-24.js       |   23 +
 .../Array/prototype/reduce/15.4.4.21-3-25.js       |   23 +
 .../Array/prototype/reduce/15.4.4.21-3-3.js        |   25 +
 .../Array/prototype/reduce/15.4.4.21-3-4.js        |   26 +
 .../Array/prototype/reduce/15.4.4.21-3-5.js        |   26 +
 .../Array/prototype/reduce/15.4.4.21-3-6.js        |   23 +
 .../Array/prototype/reduce/15.4.4.21-3-7.js        |   23 +
 .../Array/prototype/reduce/15.4.4.21-3-9.js        |   25 +
 .../Array/prototype/reduce/15.4.4.21-4-1.js        |   14 +
 .../Array/prototype/reduce/15.4.4.21-4-10.js       |   27 +
 .../Array/prototype/reduce/15.4.4.21-4-11.js       |   31 +
 .../Array/prototype/reduce/15.4.4.21-4-12.js       |   19 +
 .../Array/prototype/reduce/15.4.4.21-4-15.js       |   38 +
 .../Array/prototype/reduce/15.4.4.21-4-2.js        |   16 +
 .../Array/prototype/reduce/15.4.4.21-4-3.js        |   14 +
 .../Array/prototype/reduce/15.4.4.21-4-4.js        |   14 +
 .../Array/prototype/reduce/15.4.4.21-4-5.js        |   14 +
 .../Array/prototype/reduce/15.4.4.21-4-6.js        |   14 +
 .../Array/prototype/reduce/15.4.4.21-4-7.js        |   16 +
 .../Array/prototype/reduce/15.4.4.21-4-8.js        |   30 +
 .../Array/prototype/reduce/15.4.4.21-4-9.js        |   34 +
 .../Array/prototype/reduce/15.4.4.21-5-1.js        |   16 +
 .../Array/prototype/reduce/15.4.4.21-5-10.js       |   34 +
 .../Array/prototype/reduce/15.4.4.21-5-11.js       |   38 +
 .../Array/prototype/reduce/15.4.4.21-5-12.js       |   31 +
 .../Array/prototype/reduce/15.4.4.21-5-13.js       |   35 +
 .../Array/prototype/reduce/15.4.4.21-5-2.js        |   23 +
 .../Array/prototype/reduce/15.4.4.21-5-3.js        |   23 +
 .../Array/prototype/reduce/15.4.4.21-5-4.js        |   23 +
 .../Array/prototype/reduce/15.4.4.21-5-5.js        |   23 +
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 .../prototype/reduceRight/15.4.4.22-8-b-iii-1-6.js |   29 +
 .../prototype/reduceRight/15.4.4.22-8-b-iii-1-7.js |   34 +
 .../prototype/reduceRight/15.4.4.22-8-b-iii-1-8.js |   26 +
 .../prototype/reduceRight/15.4.4.22-8-b-iii-1-9.js |   35 +
 .../Array/prototype/reduceRight/15.4.4.22-8-c-1.js |   19 +
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 .../Array/prototype/reduceRight/15.4.4.22-8-c-3.js |   24 +
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 .../prototype/reduceRight/15.4.4.22-9-b-12.js      |   39 +
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 .../prototype/reduceRight/15.4.4.22-9-b-28.js      |   39 +
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 .../Array/prototype/reduceRight/15.4.4.22-9-b-3.js |   39 +
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 .../prototype/reduceRight/15.4.4.22-9-c-ii-4-s.js  |   24 +
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 .../prototype/reduceRight/15.4.4.22-9-c-ii-8.js    |   29 +
 .../prototype/reduceRight/15.4.4.22-9-c-ii-9.js    |   21 +
 .../Array/prototype/reduceRight/browser.js         |    0
 .../prototype/reduceRight/call-with-boolean.js     |   20 +
 .../reduceRight/callbackfn-resize-arraybuffer.js   |   81 +
 .../reduceRight/length-near-integer-limit.js       |   59 +
 .../Array/prototype/reduceRight/length.js          |   30 +
 .../built-ins/Array/prototype/reduceRight/name.js  |   28 +
 .../prototype/reduceRight/not-a-constructor.js     |   35 +
 .../Array/prototype/reduceRight/prop-desc.js       |   23 +
 .../built-ins/Array/prototype/reduceRight/shell.js |  161 ++
 .../Array/prototype/reverse/S15.4.4.8_A1_T1.js     |   43 +
 .../Array/prototype/reverse/S15.4.4.8_A1_T2.js     |  108 +
 .../Array/prototype/reverse/S15.4.4.8_A2_T1.js     |  113 +
 .../Array/prototype/reverse/S15.4.4.8_A2_T2.js     |  113 +
 .../Array/prototype/reverse/S15.4.4.8_A2_T3.js     |  113 +
 .../Array/prototype/reverse/S15.4.4.8_A3_T3.js     |   38 +
 .../Array/prototype/reverse/S15.4.4.8_A4_T1.js     |   62 +
 .../Array/prototype/reverse/S15.4.4.8_A4_T2.js     |   63 +
 .../Array/prototype/reverse/array-has-one-entry.js |   25 +
 .../built-ins/Array/prototype/reverse/browser.js   |    0
 .../Array/prototype/reverse/call-with-boolean.js   |   20 +
 .../reverse/get_if_present_with_delete.js          |   39 +
 .../length-exceeding-integer-limit-with-object.js  |   35 +
 .../length-exceeding-integer-limit-with-proxy.js   |  122 ++
 .../built-ins/Array/prototype/reverse/length.js    |   30 +
 .../built-ins/Array/prototype/reverse/name.js      |   28 +
 .../Array/prototype/reverse/not-a-constructor.js   |   35 +
 .../built-ins/Array/prototype/reverse/prop-desc.js |   23 +
 .../built-ins/Array/prototype/reverse/shell.js     |   33 +
 .../test262/built-ins/Array/prototype/shell.js     |    0
 .../Array/prototype/shift/S15.4.4.9_A1.1_T1.js     |   33 +
 .../Array/prototype/shift/S15.4.4.9_A1.2_T1.js     |   60 +
 .../Array/prototype/shift/S15.4.4.9_A2_T1.js       |   49 +
 .../Array/prototype/shift/S15.4.4.9_A2_T2.js       |   71 +
 .../Array/prototype/shift/S15.4.4.9_A2_T3.js       |   37 +
 .../Array/prototype/shift/S15.4.4.9_A2_T4.js       |   48 +
 .../Array/prototype/shift/S15.4.4.9_A2_T5.js       |  126 ++
 .../Array/prototype/shift/S15.4.4.9_A3_T3.js       |   33 +
 .../Array/prototype/shift/S15.4.4.9_A4_T1.js       |   58 +
 .../Array/prototype/shift/S15.4.4.9_A4_T2.js       |   59 +
 .../built-ins/Array/prototype/shift/browser.js     |    0
 .../Array/prototype/shift/call-with-boolean.js     |   20 +
 .../built-ins/Array/prototype/shift/length.js      |   30 +
 .../built-ins/Array/prototype/shift/name.js        |   28 +
 .../Array/prototype/shift/not-a-constructor.js     |   35 +
 .../built-ins/Array/prototype/shift/prop-desc.js   |   23 +
 .../prototype/shift/set-length-array-is-frozen.js  |   45 +
 .../set-length-array-length-is-non-writable.js     |   45 +
 .../shift/set-length-zero-array-is-frozen.js       |   34 +
 ...set-length-zero-array-length-is-non-writable.js |   34 +
 .../built-ins/Array/prototype/shift/shell.js       |    0
 ...ows-when-this-value-length-is-writable-false.js |   37 +
 .../Array/prototype/slice/15.4.4.10-10-c-ii-1.js   |   25 +
 .../Array/prototype/slice/S15.4.4.10_A1.1_T1.js    |   40 +
 .../Array/prototype/slice/S15.4.4.10_A1.1_T2.js    |   28 +
 .../Array/prototype/slice/S15.4.4.10_A1.1_T3.js    |   28 +
 .../Array/prototype/slice/S15.4.4.10_A1.1_T4.js    |   28 +
 .../Array/prototype/slice/S15.4.4.10_A1.1_T5.js    |   36 +
 .../Array/prototype/slice/S15.4.4.10_A1.1_T6.js    |   36 +
 .../Array/prototype/slice/S15.4.4.10_A1.1_T7.js    |   36 +
 .../Array/prototype/slice/S15.4.4.10_A1.2_T1.js    |   32 +
 .../Array/prototype/slice/S15.4.4.10_A1.2_T2.js    |   32 +
 .../Array/prototype/slice/S15.4.4.10_A1.2_T3.js    |   32 +
 .../Array/prototype/slice/S15.4.4.10_A1.2_T4.js    |   48 +
 .../Array/prototype/slice/S15.4.4.10_A1.3_T1.js    |   40 +
 .../Array/prototype/slice/S15.4.4.10_A1.3_T2.js    |   28 +
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 .../Array/prototype/slice/S15.4.4.10_A1.3_T4.js    |   28 +
 .../Array/prototype/slice/S15.4.4.10_A1.4_T1.js    |   40 +
 .../Array/prototype/slice/S15.4.4.10_A1.4_T2.js    |   36 +
 .../Array/prototype/slice/S15.4.4.10_A1.4_T3.js    |   44 +
 .../Array/prototype/slice/S15.4.4.10_A1.4_T4.js    |   28 +
 .../Array/prototype/slice/S15.4.4.10_A1.5_T1.js    |   34 +
 .../Array/prototype/slice/S15.4.4.10_A1.5_T2.js    |   34 +
 .../Array/prototype/slice/S15.4.4.10_A2.1_T1.js    |   34 +
 .../Array/prototype/slice/S15.4.4.10_A2.1_T2.js    |   38 +
 .../Array/prototype/slice/S15.4.4.10_A2.1_T3.js    |   26 +
 .../Array/prototype/slice/S15.4.4.10_A2.1_T4.js    |   38 +
 .../Array/prototype/slice/S15.4.4.10_A2.1_T5.js    |   45 +
 .../Array/prototype/slice/S15.4.4.10_A2.2_T1.js    |   34 +
 .../Array/prototype/slice/S15.4.4.10_A2.2_T2.js    |   26 +
 .../Array/prototype/slice/S15.4.4.10_A2.2_T3.js    |   46 +
 .../Array/prototype/slice/S15.4.4.10_A2.2_T4.js    |   26 +
 .../Array/prototype/slice/S15.4.4.10_A2.2_T5.js    |   45 +
 .../Array/prototype/slice/S15.4.4.10_A2_T1.js      |   49 +
 .../Array/prototype/slice/S15.4.4.10_A2_T2.js      |   49 +
 .../Array/prototype/slice/S15.4.4.10_A2_T3.js      |   49 +
 .../Array/prototype/slice/S15.4.4.10_A2_T4.js      |   49 +
 .../Array/prototype/slice/S15.4.4.10_A2_T5.js      |   47 +
 .../Array/prototype/slice/S15.4.4.10_A2_T6.js      |   47 +
 .../Array/prototype/slice/S15.4.4.10_A3_T1.js      |   19 +
 .../Array/prototype/slice/S15.4.4.10_A3_T2.js      |   19 +
 .../Array/prototype/slice/S15.4.4.10_A3_T3.js      |   24 +
 .../Array/prototype/slice/S15.4.4.10_A4_T1.js      |   27 +
 .../built-ins/Array/prototype/slice/browser.js     |    0
 .../Array/prototype/slice/call-with-boolean.js     |   13 +
 .../prototype/slice/create-ctor-non-object.js      |   45 +
 .../Array/prototype/slice/create-ctor-poisoned.js  |   29 +
 .../slice/create-non-array-invalid-len.js          |   44 +
 .../Array/prototype/slice/create-non-array.js      |   35 +
 .../slice/create-proto-from-ctor-realm-array.js    |   45 +
 .../create-proto-from-ctor-realm-non-array.js      |   46 +
 .../slice/create-proxied-array-invalid-len.js      |   54 +
 .../Array/prototype/slice/create-proxy.js          |   41 +
 .../Array/prototype/slice/create-revoked-proxy.js  |   41 +
 .../Array/prototype/slice/create-species-abrupt.js |   35 +
 .../prototype/slice/create-species-neg-zero.js     |   47 +
 .../prototype/slice/create-species-non-ctor.js     |   41 +
 .../Array/prototype/slice/create-species-null.js   |   35 +
 .../prototype/slice/create-species-poisoned.js     |   34 +
 .../Array/prototype/slice/create-species-undef.js  |   36 +
 .../Array/prototype/slice/create-species.js        |   45 +
 ...length-exceeding-integer-limit-proxied-array.js |   59 +
 .../slice/length-exceeding-integer-limit.js        |   50 +
 .../built-ins/Array/prototype/slice/length.js      |   30 +
 .../built-ins/Array/prototype/slice/name.js        |   28 +
 .../Array/prototype/slice/not-a-constructor.js     |   35 +
 .../built-ins/Array/prototype/slice/prop-desc.js   |   23 +
 .../built-ins/Array/prototype/slice/shell.js       |    0
 .../prototype/slice/target-array-non-extensible.js |   41 +
 .../target-array-with-non-configurable-property.js |   43 +
 .../target-array-with-non-writable-property.js     |   38 +
 .../Array/prototype/some/15.4.4.17-1-1.js          |   14 +
 .../Array/prototype/some/15.4.4.17-1-10.js         |   18 +
 .../Array/prototype/some/15.4.4.17-1-11.js         |   20 +
 .../Array/prototype/some/15.4.4.17-1-12.js         |   20 +
 .../Array/prototype/some/15.4.4.17-1-13.js         |   18 +
 .../Array/prototype/some/15.4.4.17-1-14.js         |   19 +
 .../Array/prototype/some/15.4.4.17-1-15.js         |   19 +
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 .../built-ins/Array/prototype/some/browser.js      |    0
 .../Array/prototype/some/call-with-boolean.js      |   20 +
 .../some/callbackfn-resize-arraybuffer.js          |   74 +
 .../built-ins/Array/prototype/some/length.js       |   30 +
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 .../Array/prototype/some/not-a-constructor.js      |   31 +
 .../built-ins/Array/prototype/some/prop-desc.js    |   23 +
 .../built-ins/Array/prototype/some/shell.js        |  161 ++
 .../Array/prototype/sort/S15.4.4.11_A1.1_T1.js     |   27 +
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 .../Array/prototype/sort/S15.4.4.11_A8.js          |   25 +
 .../built-ins/Array/prototype/sort/browser.js      |    0
 .../built-ins/Array/prototype/sort/bug_596_1.js    |   26 +
 .../built-ins/Array/prototype/sort/bug_596_2.js    |   57 +
 .../Array/prototype/sort/call-with-primitive.js    |   32 +
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 .../test262/built-ins/Array/prototype/sort/name.js |   28 +
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 .../prototype/sort/precise-comparefn-throws.js     |   54 +
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 .../prototype/sort/precise-getter-pops-elements.js |   42 +
 .../sort/precise-getter-sets-predecessor.js        |   43 +
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 .../prototype/sort/precise-setter-pops-elements.js |   40 +
 .../sort/precise-setter-sets-predecessor.js        |   41 +
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 .../built-ins/Array/prototype/sort/prop-desc.js    |   23 +
 .../built-ins/Array/prototype/sort/shell.js        |    0
 .../Array/prototype/sort/stability-11-elements.js  |   38 +
 .../prototype/sort/stability-2048-elements.js      | 2083 ++++++++++++++++++
 .../Array/prototype/sort/stability-5-elements.js   |   29 +
 .../Array/prototype/sort/stability-513-elements.js |  548 +++++
 .../Array/prototype/splice/15.4.4.12-9-a-1.js      |   17 +
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 create mode 100644 js/src/tests/test262/built-ins/Array/prototype/toSpliced/start-and-deleteCount-undefineds.js
 create mode 100644 js/src/tests/test262/built-ins/Array/prototype/toSpliced/start-bigger-than-length.js
 create mode 100644 js/src/tests/test262/built-ins/Array/prototype/toSpliced/start-neg-infinity-is-zero.js
 create mode 100644 js/src/tests/test262/built-ins/Array/prototype/toSpliced/start-neg-less-than-minus-length-is-zero.js
 create mode 100644 js/src/tests/test262/built-ins/Array/prototype/toSpliced/start-neg-subtracted-from-length.js
 create mode 100644 js/src/tests/test262/built-ins/Array/prototype/toSpliced/start-undefined-and-deleteCount-missing.js
 create mode 100644 js/src/tests/test262/built-ins/Array/prototype/toSpliced/this-value-boolean.js
 create mode 100644 js/src/tests/test262/built-ins/Array/prototype/toSpliced/this-value-nullish.js
 create mode 100644 js/src/tests/test262/built-ins/Array/prototype/toSpliced/unmodified.js
 create mode 100644 js/src/tests/test262/built-ins/Array/prototype/toString/S15.4.4.2_A1_T1.js
 create mode 100644 js/src/tests/test262/built-ins/Array/prototype/toString/S15.4.4.2_A1_T2.js
 create mode 100644 js/src/tests/test262/built-ins/Array/prototype/toString/S15.4.4.2_A1_T3.js
 create mode 100644 js/src/tests/test262/built-ins/Array/prototype/toString/S15.4.4.2_A1_T4.js
 create mode 100644 js/src/tests/test262/built-ins/Array/prototype/toString/S15.4.4.2_A3_T1.js
 create mode 100644 js/src/tests/test262/built-ins/Array/prototype/toString/browser.js
 create mode 100644 js/src/tests/test262/built-ins/Array/prototype/toString/call-with-boolean.js
 create mode 100644 js/src/tests/test262/built-ins/Array/prototype/toString/length.js
 create mode 100644 js/src/tests/test262/built-ins/Array/prototype/toString/name.js
 create mode 100644 js/src/tests/test262/built-ins/Array/prototype/toString/non-callable-join-string-tag.js
 create mode 100644 js/src/tests/test262/built-ins/Array/prototype/toString/not-a-constructor.js
 create mode 100644 js/src/tests/test262/built-ins/Array/prototype/toString/prop-desc.js
 create mode 100644 js/src/tests/test262/built-ins/Array/prototype/toString/shell.js
 create mode 100644 js/src/tests/test262/built-ins/Array/prototype/unshift/S15.4.4.13_A1_T1.js
 create mode 100644 js/src/tests/test262/built-ins/Array/prototype/unshift/S15.4.4.13_A1_T2.js
 create mode 100644 js/src/tests/test262/built-ins/Array/prototype/unshift/S15.4.4.13_A2_T1.js
 create mode 100644 js/src/tests/test262/built-ins/Array/prototype/unshift/S15.4.4.13_A2_T2.js
 create mode 100644 js/src/tests/test262/built-ins/Array/prototype/unshift/S15.4.4.13_A2_T3.js
 create mode 100644 js/src/tests/test262/built-ins/Array/prototype/unshift/S15.4.4.13_A3_T2.js
 create mode 100644 js/src/tests/test262/built-ins/Array/prototype/unshift/S15.4.4.13_A4_T1.js
 create mode 100644 js/src/tests/test262/built-ins/Array/prototype/unshift/S15.4.4.13_A4_T2.js
 create mode 100644 js/src/tests/test262/built-ins/Array/prototype/unshift/browser.js
 create mode 100644 js/src/tests/test262/built-ins/Array/prototype/unshift/call-with-boolean.js
 create mode 100644 js/src/tests/test262/built-ins/Array/prototype/unshift/clamps-to-integer-limit.js
 create mode 100644 js/src/tests/test262/built-ins/Array/prototype/unshift/length-near-integer-limit.js
 create mode 100644 js/src/tests/test262/built-ins/Array/prototype/unshift/length.js
 create mode 100644 js/src/tests/test262/built-ins/Array/prototype/unshift/name.js
 create mode 100644 js/src/tests/test262/built-ins/Array/prototype/unshift/not-a-constructor.js
 create mode 100644 js/src/tests/test262/built-ins/Array/prototype/unshift/prop-desc.js
 create mode 100644 js/src/tests/test262/built-ins/Array/prototype/unshift/set-length-array-is-frozen.js
 create mode 100644 js/src/tests/test262/built-ins/Array/prototype/unshift/set-length-array-length-is-non-writable.js
 create mode 100644 js/src/tests/test262/built-ins/Array/prototype/unshift/set-length-zero-array-is-frozen.js
 create mode 100644 js/src/tests/test262/built-ins/Array/prototype/unshift/set-length-zero-array-length-is-non-writable.js
 create mode 100644 js/src/tests/test262/built-ins/Array/prototype/unshift/shell.js
 create mode 100644 js/src/tests/test262/built-ins/Array/prototype/unshift/throws-if-integer-limit-exceeded.js
 create mode 100644 js/src/tests/test262/built-ins/Array/prototype/unshift/throws-with-string-receiver.js
 create mode 100644 js/src/tests/test262/built-ins/Array/prototype/values/browser.js
 create mode 100644 js/src/tests/test262/built-ins/Array/prototype/values/iteration-mutable.js
 create mode 100644 js/src/tests/test262/built-ins/Array/prototype/values/iteration.js
 create mode 100644 js/src/tests/test262/built-ins/Array/prototype/values/length.js
 create mode 100644 js/src/tests/test262/built-ins/Array/prototype/values/name.js
 create mode 100644 js/src/tests/test262/built-ins/Array/prototype/values/not-a-constructor.js
 create mode 100644 js/src/tests/test262/built-ins/Array/prototype/values/prop-desc.js
 create mode 100644 js/src/tests/test262/built-ins/Array/prototype/values/returns-iterator-from-object.js
 create mode 100644 js/src/tests/test262/built-ins/Array/prototype/values/returns-iterator.js
 create mode 100644 js/src/tests/test262/built-ins/Array/prototype/values/shell.js
 create mode 100644 js/src/tests/test262/built-ins/Array/prototype/values/this-val-non-obj-coercible.js
 create mode 100644 js/src/tests/test262/built-ins/Array/prototype/with/browser.js
 create mode 100644 js/src/tests/test262/built-ins/Array/prototype/with/frozen-this-value.js
 create mode 100644 js/src/tests/test262/built-ins/Array/prototype/with/holes-not-preserved.js
 create mode 100644 js/src/tests/test262/built-ins/Array/prototype/with/ignores-species.js
 create mode 100644 js/src/tests/test262/built-ins/Array/prototype/with/immutable.js
 create mode 100644 js/src/tests/test262/built-ins/Array/prototype/with/index-bigger-or-eq-than-length.js
 create mode 100644 js/src/tests/test262/built-ins/Array/prototype/with/index-casted-to-number.js
 create mode 100644 js/src/tests/test262/built-ins/Array/prototype/with/index-negative.js
 create mode 100644 js/src/tests/test262/built-ins/Array/prototype/with/index-smaller-than-minus-length.js
 create mode 100644 js/src/tests/test262/built-ins/Array/prototype/with/length-decreased-while-iterating.js
 create mode 100644 js/src/tests/test262/built-ins/Array/prototype/with/length-exceeding-array-length-limit.js
 create mode 100644 js/src/tests/test262/built-ins/Array/prototype/with/length-increased-while-iterating.js
 create mode 100644 js/src/tests/test262/built-ins/Array/prototype/with/length-tolength.js
 create mode 100644 js/src/tests/test262/built-ins/Array/prototype/with/metadata/browser.js
 create mode 100644 js/src/tests/test262/built-ins/Array/prototype/with/metadata/length.js
 create mode 100644 js/src/tests/test262/built-ins/Array/prototype/with/metadata/name.js
 create mode 100644 js/src/tests/test262/built-ins/Array/prototype/with/metadata/property-descriptor.js
 create mode 100644 js/src/tests/test262/built-ins/Array/prototype/with/metadata/shell.js
 create mode 100644 js/src/tests/test262/built-ins/Array/prototype/with/no-get-replaced-index.js
 create mode 100644 js/src/tests/test262/built-ins/Array/prototype/with/not-a-constructor.js
 create mode 100644 js/src/tests/test262/built-ins/Array/prototype/with/shell.js
 create mode 100644 js/src/tests/test262/built-ins/Array/prototype/with/this-value-boolean.js
 create mode 100644 js/src/tests/test262/built-ins/Array/prototype/with/this-value-nullish.js
 create mode 100644 js/src/tests/test262/built-ins/Array/shell.js

(limited to 'js/src/tests/test262/built-ins/Array')

diff --git a/js/src/tests/test262/built-ins/Array/15.4.5-1.js b/js/src/tests/test262/built-ins/Array/15.4.5-1.js
new file mode 100644
index 0000000000..5cefc5f280
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/15.4.5-1.js
@@ -0,0 +1,14 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.4.5-1
+description: Array instances have [[Class]] set to 'Array'
+---*/
+
+var a = [];
+var s = Object.prototype.toString.call(a);
+
+assert.sameValue(s, '[object Array]', 'The value of s is expected to be "[object Array]"');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/15.4.5.1-5-1.js b/js/src/tests/test262/built-ins/Array/15.4.5.1-5-1.js
new file mode 100644
index 0000000000..ca5c6f88e6
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/15.4.5.1-5-1.js
@@ -0,0 +1,16 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.4.5.1-5-1
+description: >
+    Defining a property named 4294967295 (2**32-1)(not an array
+    element)
+---*/
+
+var a = [];
+a[4294967295] = "not an array element";
+
+assert.sameValue(a[4294967295], "not an array element", 'The value of a[4294967295] is expected to be "not an array element"');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/15.4.5.1-5-2.js b/js/src/tests/test262/built-ins/Array/15.4.5.1-5-2.js
new file mode 100644
index 0000000000..c0157dd77f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/15.4.5.1-5-2.js
@@ -0,0 +1,16 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.4.5.1-5-2
+description: >
+    Defining a property named 4294967295 (2**32-1) doesn't change
+    length of the array
+---*/
+
+var a = [0, 1, 2];
+a[4294967295] = "not an array element";
+
+assert.sameValue(a.length, 3, 'The value of a.length is expected to be 3');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/S15.4.1_A1.1_T1.js b/js/src/tests/test262/built-ins/Array/S15.4.1_A1.1_T1.js
new file mode 100644
index 0000000000..94bd07777f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/S15.4.1_A1.1_T1.js
@@ -0,0 +1,25 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    The [[Prototype]] property of the newly constructed object
+    is set to the original Array prototype object, the one that
+    is the initial value of Array.prototype
+es5id: 15.4.1_A1.1_T1
+description: >
+    Create new property of Array.prototype. When new Array object has
+    this property
+---*/
+
+Array.prototype.myproperty = 42;
+var x = Array();
+assert.sameValue(x.myproperty, 42, 'The value of x.myproperty is expected to be 42');
+
+assert.sameValue(
+  Object.prototype.hasOwnProperty.call(x, 'myproperty'),
+  false,
+  'Object.prototype.hasOwnProperty.call(Array(), "myproperty") must return false'
+);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/S15.4.1_A1.1_T2.js b/js/src/tests/test262/built-ins/Array/S15.4.1_A1.1_T2.js
new file mode 100644
index 0000000000..864c449d4b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/S15.4.1_A1.1_T2.js
@@ -0,0 +1,21 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    The [[Prototype]] property of the newly constructed object
+    is set to the original Array prototype object, the one that
+    is the initial value of Array.prototype
+es5id: 15.4.1_A1.1_T2
+description: Array.prototype.toString = Object.prototype.toString
+---*/
+
+Array.prototype.toString = Object.prototype.toString;
+var x = Array();
+assert.sameValue(x.toString(), "[object Array]", 'x.toString() must return "[object Array]"');
+
+Array.prototype.toString = Object.prototype.toString;
+var x = Array(0, 1, 2);
+assert.sameValue(x.toString(), "[object Array]", 'x.toString() must return "[object Array]"');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/S15.4.1_A1.1_T3.js b/js/src/tests/test262/built-ins/Array/S15.4.1_A1.1_T3.js
new file mode 100644
index 0000000000..81e7b2db31
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/S15.4.1_A1.1_T3.js
@@ -0,0 +1,19 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    The [[Prototype]] property of the newly constructed object
+    is set to the original Array prototype object, the one that
+    is the initial value of Array.prototype
+es5id: 15.4.1_A1.1_T3
+description: Checking use isPrototypeOf
+---*/
+
+assert.sameValue(
+  Array.prototype.isPrototypeOf(Array()),
+  true,
+  'Array.prototype.isPrototypeOf(Array()) must return true'
+);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/S15.4.1_A1.2_T1.js b/js/src/tests/test262/built-ins/Array/S15.4.1_A1.2_T1.js
new file mode 100644
index 0000000000..c398a6535c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/S15.4.1_A1.2_T1.js
@@ -0,0 +1,18 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: The [[Class]] property of the newly constructed object is set to "Array"
+es5id: 15.4.1_A1.2_T1
+description: Checking use Object.prototype.toString
+---*/
+
+var x = Array();
+x.getClass = Object.prototype.toString;
+assert.sameValue(x.getClass(), "[object Array]", 'x.getClass() must return "[object Array]"');
+
+var x = Array(0, 1, 2);
+x.getClass = Object.prototype.toString;
+assert.sameValue(x.getClass(), "[object Array]", 'x.getClass() must return "[object Array]"');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/S15.4.1_A1.3_T1.js b/js/src/tests/test262/built-ins/Array/S15.4.1_A1.3_T1.js
new file mode 100644
index 0000000000..cbb64bf166
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/S15.4.1_A1.3_T1.js
@@ -0,0 +1,17 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    This description of Array constructor applies if and only if
+    the Array constructor is given no arguments or at least two arguments
+es5id: 15.4.1_A1.3_T1
+description: Checking case when Array constructor is given one argument
+---*/
+
+var x = Array(2);
+
+assert.notSameValue(x.length, 1, 'The value of x.length is not 1');
+assert.notSameValue(x[0], 2, 'The value of x[0] is not 2');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/S15.4.1_A2.1_T1.js b/js/src/tests/test262/built-ins/Array/S15.4.1_A2.1_T1.js
new file mode 100644
index 0000000000..335ea90b3c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/S15.4.1_A2.1_T1.js
@@ -0,0 +1,20 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    The length property of the newly constructed object;
+    is set to the number of arguments
+es5id: 15.4.1_A2.1_T1
+description: Array constructor is given no arguments or at least two arguments
+---*/
+assert.sameValue(Array().length, 0, 'The value of Array().length is expected to be 0');
+assert.sameValue(Array(0, 1, 0, 1).length, 4, 'The value of Array(0, 1, 0, 1).length is expected to be 4');
+
+assert.sameValue(
+  Array(undefined, undefined).length,
+  2,
+  'The value of Array(undefined, undefined).length is expected to be 2'
+);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/S15.4.1_A2.2_T1.js b/js/src/tests/test262/built-ins/Array/S15.4.1_A2.2_T1.js
new file mode 100644
index 0000000000..b2cbaa38fe
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/S15.4.1_A2.2_T1.js
@@ -0,0 +1,37 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    The 0 property of the newly constructed object is set to item0
+    (if supplied); the 1 property of the newly constructed object is set to item1
+    (if supplied); and, in general, for as many arguments as there are, the k property
+    of the newly constructed object is set to argument k, where the first argument is
+    considered to be argument number 0
+es5id: 15.4.1_A2.2_T1
+description: Checking correct work this algorithm
+---*/
+
+var x = Array(
+  0, 1, 2, 3, 4, 5, 6, 7, 8, 9,
+  10, 11, 12, 13, 14, 15, 16, 17, 18, 19,
+  20, 21, 22, 23, 24, 25, 26, 27, 28, 29,
+  30, 31, 32, 33, 34, 35, 36, 37, 38, 39,
+  40, 41, 42, 43, 44, 45, 46, 47, 48, 49,
+  50, 51, 52, 53, 54, 55, 56, 57, 58, 59,
+  60, 61, 62, 63, 64, 65, 66, 67, 68, 69,
+  70, 71, 72, 73, 74, 75, 76, 77, 78, 79,
+  80, 81, 82, 83, 84, 85, 86, 87, 88, 89,
+  90, 91, 92, 93, 94, 95, 96, 97, 98, 99
+);
+
+for (var i = 0; i < 100; i++) {
+  var result = true;
+  if (x[i] !== i) {
+    result = false;
+  }
+}
+
+assert.sameValue(result, true, 'The value of result is expected to be true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/S15.4.1_A3.1_T1.js b/js/src/tests/test262/built-ins/Array/S15.4.1_A3.1_T1.js
new file mode 100644
index 0000000000..1e762e4a9f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/S15.4.1_A3.1_T1.js
@@ -0,0 +1,20 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    When Array is called as a function rather than as a constructor,
+    it creates and initialises a new Array object
+es5id: 15.4.1_A3.1_T1
+description: Checking use typeof, instanceof
+---*/
+
+assert.sameValue(typeof Array(), "object", 'The value of `typeof Array()` is expected to be "object"');
+
+assert.sameValue(
+  Array() instanceof Array,
+  true,
+  'The result of evaluating (Array() instanceof Array) is expected to be true'
+);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/S15.4.2.1_A1.1_T1.js b/js/src/tests/test262/built-ins/Array/S15.4.2.1_A1.1_T1.js
new file mode 100644
index 0000000000..e682359d1b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/S15.4.2.1_A1.1_T1.js
@@ -0,0 +1,20 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    The [[Prototype]] property of the newly constructed object
+    is set to the original Array prototype object, the one that
+    is the initial value of Array.prototype
+es5id: 15.4.2.1_A1.1_T1
+description: >
+    Create new property of Array.prototype. When new Array object has
+    this property
+---*/
+
+Array.prototype.myproperty = 1;
+var x = new Array();
+assert.sameValue(x.myproperty, 1, 'The value of x.myproperty is expected to be 1');
+assert.sameValue(x.hasOwnProperty('myproperty'), false, 'x.hasOwnProperty("myproperty") must return false');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/S15.4.2.1_A1.1_T2.js b/js/src/tests/test262/built-ins/Array/S15.4.2.1_A1.1_T2.js
new file mode 100644
index 0000000000..17a7a33d2e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/S15.4.2.1_A1.1_T2.js
@@ -0,0 +1,21 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    The [[Prototype]] property of the newly constructed object
+    is set to the original Array prototype object, the one that
+    is the initial value of Array.prototype
+es5id: 15.4.2.1_A1.1_T2
+description: Array.prototype.toString = Object.prototype.toString
+---*/
+
+Array.prototype.toString = Object.prototype.toString;
+var x = new Array();
+assert.sameValue(x.toString(), "[object Array]", 'x.toString() must return "[object Array]"');
+
+Array.prototype.toString = Object.prototype.toString;
+var x = new Array(0, 1, 2);
+assert.sameValue(x.toString(), "[object Array]", 'x.toString() must return "[object Array]"');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/S15.4.2.1_A1.1_T3.js b/js/src/tests/test262/built-ins/Array/S15.4.2.1_A1.1_T3.js
new file mode 100644
index 0000000000..4bc7de6ea3
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/S15.4.2.1_A1.1_T3.js
@@ -0,0 +1,18 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    The [[Prototype]] property of the newly constructed object
+    is set to the original Array prototype object, the one that
+    is the initial value of Array.prototype
+es5id: 15.4.2.1_A1.1_T3
+description: Checking use isPrototypeOf
+---*/
+assert.sameValue(
+  Array.prototype.isPrototypeOf(new Array()),
+  true,
+  'Array.prototype.isPrototypeOf(new Array()) must return true'
+);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/S15.4.2.1_A1.2_T1.js b/js/src/tests/test262/built-ins/Array/S15.4.2.1_A1.2_T1.js
new file mode 100644
index 0000000000..080ed96634
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/S15.4.2.1_A1.2_T1.js
@@ -0,0 +1,18 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: The [[Class]] property of the newly constructed object is set to "Array"
+es5id: 15.4.2.1_A1.2_T1
+description: Checking use Object.prototype.toString
+---*/
+
+var x = new Array();
+x.getClass = Object.prototype.toString;
+assert.sameValue(x.getClass(), "[object Array]", 'x.getClass() must return "[object Array]"');
+
+var x = new Array(0, 1, 2);
+x.getClass = Object.prototype.toString;
+assert.sameValue(x.getClass(), "[object Array]", 'x.getClass() must return "[object Array]"');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/S15.4.2.1_A1.3_T1.js b/js/src/tests/test262/built-ins/Array/S15.4.2.1_A1.3_T1.js
new file mode 100644
index 0000000000..15c5531212
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/S15.4.2.1_A1.3_T1.js
@@ -0,0 +1,17 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    This description of Array constructor applies if and only if
+    the Array constructor is given no arguments or at least two arguments
+es5id: 15.4.2.1_A1.3_T1
+description: Checking case when Array constructor is given one argument
+---*/
+
+var x = new Array(2);
+
+assert.notSameValue(x.length, 1, 'The value of x.length is not 1');
+assert.notSameValue(x[0], 2, 'The value of x[0] is not 2');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/S15.4.2.1_A2.1_T1.js b/js/src/tests/test262/built-ins/Array/S15.4.2.1_A2.1_T1.js
new file mode 100644
index 0000000000..c2e82b8c81
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/S15.4.2.1_A2.1_T1.js
@@ -0,0 +1,20 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    The length property of the newly constructed object;
+    is set to the number of arguments
+es5id: 15.4.2.1_A2.1_T1
+description: Array constructor is given no arguments or at least two arguments
+---*/
+assert.sameValue(new Array().length, 0, 'The value of new Array().length is expected to be 0');
+assert.sameValue(new Array(0, 1, 0, 1).length, 4, 'The value of new Array(0, 1, 0, 1).length is expected to be 4');
+
+assert.sameValue(
+  new Array(undefined, undefined).length,
+  2,
+  'The value of new Array(undefined, undefined).length is expected to be 2'
+);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/S15.4.2.1_A2.2_T1.js b/js/src/tests/test262/built-ins/Array/S15.4.2.1_A2.2_T1.js
new file mode 100644
index 0000000000..8b56efd0ac
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/S15.4.2.1_A2.2_T1.js
@@ -0,0 +1,37 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    The 0 property of the newly constructed object is set to item0
+    (if supplied); the 1 property of the newly constructed object is set to item1
+    (if supplied); and, in general, for as many arguments as there are, the k property
+    of the newly constructed object is set to argument k, where the first argument is
+    considered to be argument number 0
+es5id: 15.4.2.1_A2.2_T1
+description: Checking correct work this algorithm
+---*/
+
+var x = new Array(
+  0, 1, 2, 3, 4, 5, 6, 7, 8, 9,
+  10, 11, 12, 13, 14, 15, 16, 17, 18, 19,
+  20, 21, 22, 23, 24, 25, 26, 27, 28, 29,
+  30, 31, 32, 33, 34, 35, 36, 37, 38, 39,
+  40, 41, 42, 43, 44, 45, 46, 47, 48, 49,
+  50, 51, 52, 53, 54, 55, 56, 57, 58, 59,
+  60, 61, 62, 63, 64, 65, 66, 67, 68, 69,
+  70, 71, 72, 73, 74, 75, 76, 77, 78, 79,
+  80, 81, 82, 83, 84, 85, 86, 87, 88, 89,
+  90, 91, 92, 93, 94, 95, 96, 97, 98, 99
+);
+
+for (var i = 0; i < 100; i++) {
+  var result = true;
+  if (x[i] !== i) {
+    result = false;
+  }
+}
+
+assert.sameValue(result, true, 'The value of result is expected to be true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/S15.4.3_A1.1_T1.js b/js/src/tests/test262/built-ins/Array/S15.4.3_A1.1_T1.js
new file mode 100644
index 0000000000..c6872c6a8e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/S15.4.3_A1.1_T1.js
@@ -0,0 +1,19 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    The value of the internal [[Prototype]] property of
+    the Array constructor is the Function prototype object
+es5id: 15.4.3_A1.1_T1
+description: >
+    Create new property of Function.prototype. When Array constructor
+    has this property
+---*/
+
+Function.prototype.myproperty = 1;
+
+assert.sameValue(Array.myproperty, 1, 'The value of Array.myproperty is expected to be 1');
+assert.sameValue(Array.hasOwnProperty('myproperty'), false, 'Array.hasOwnProperty("myproperty") must return false');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/S15.4.3_A1.1_T2.js b/js/src/tests/test262/built-ins/Array/S15.4.3_A1.1_T2.js
new file mode 100644
index 0000000000..53fbd5f169
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/S15.4.3_A1.1_T2.js
@@ -0,0 +1,20 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    The value of the internal [[Prototype]] property of
+    the Array constructor is the Function prototype object
+es5id: 15.4.3_A1.1_T2
+description: Function.prototype.toString = Object.prototype.toString
+---*/
+
+Function.prototype.toString = Object.prototype.toString;
+
+assert.sameValue(
+  Array.toString(),
+  "[object Function]",
+  'Array.toString() must return "[object Function]"'
+);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/S15.4.3_A1.1_T3.js b/js/src/tests/test262/built-ins/Array/S15.4.3_A1.1_T3.js
new file mode 100644
index 0000000000..ac8d7021b3
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/S15.4.3_A1.1_T3.js
@@ -0,0 +1,17 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    The value of the internal [[Prototype]] property of
+    the Array constructor is the Function prototype object
+es5id: 15.4.3_A1.1_T3
+description: Checking use isPrototypeOf
+---*/
+assert.sameValue(
+  Function.prototype.isPrototypeOf(Array),
+  true,
+  'Function.prototype.isPrototypeOf(Array) must return true'
+);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/S15.4.5.1_A1.2_T2.js b/js/src/tests/test262/built-ins/Array/S15.4.5.1_A1.2_T2.js
new file mode 100644
index 0000000000..aa7add8256
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/S15.4.5.1_A1.2_T2.js
@@ -0,0 +1,21 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    For every integer k that is less than the value of
+    the length property of A but not less than ToUint32(length),
+    if A itself has a property (not an inherited property) named ToString(k),
+    then delete that property
+es5id: 15.4.5.1_A1.2_T2
+description: Checking an inherited property
+---*/
+
+Array.prototype[2] = -1;
+var x = [0, 1, 2];
+assert.sameValue(x[2], 2, 'The value of x[2] is expected to be 2');
+
+x.length = 2;
+assert.sameValue(x[2], -1, 'The value of x[2] is expected to be -1');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/S15.4.5.1_A2.1_T1.js b/js/src/tests/test262/built-ins/Array/S15.4.5.1_A2.1_T1.js
new file mode 100644
index 0000000000..7edca01d0f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/S15.4.5.1_A2.1_T1.js
@@ -0,0 +1,27 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    If P is not an array index, return
+    (Create a property with name P, set its value to V and give it empty attributes)
+es5id: 15.4.5.1_A2.1_T1
+description: P in [4294967295, -1, true]
+---*/
+
+var x = [];
+x[4294967295] = 1;
+assert.sameValue(x.length, 0, 'The value of x.length is expected to be 0');
+assert.sameValue(x[4294967295], 1, 'The value of x[4294967295] is expected to be 1');
+
+x = [];
+x[-1] = 1;
+assert.sameValue(x.length, 0, 'The value of x.length is expected to be 0');
+assert.sameValue(x[-1], 1, 'The value of x[-1] is expected to be 1');
+
+x = [];
+x[true] = 1;
+assert.sameValue(x.length, 0, 'The value of x.length is expected to be 0');
+assert.sameValue(x[true], 1, 'The value of x[true] is expected to be 1');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/S15.4.5.1_A2.2_T1.js b/js/src/tests/test262/built-ins/Array/S15.4.5.1_A2.2_T1.js
new file mode 100644
index 0000000000..0cf2eab493
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/S15.4.5.1_A2.2_T1.js
@@ -0,0 +1,22 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    If ToUint32(P) is less than the value of
+    the length property of A, then return
+es5id: 15.4.5.1_A2.2_T1
+description: length === 100, P in [0, 98, 99]
+---*/
+
+var x = Array(100);
+x[0] = 1;
+assert.sameValue(x.length, 100, 'The value of x.length is expected to be 100');
+
+x[98] = 1;
+assert.sameValue(x.length, 100, 'The value of x.length is expected to be 100');
+
+x[99] = 1;
+assert.sameValue(x.length, 100, 'The value of x.length is expected to be 100');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/S15.4.5.1_A2.3_T1.js b/js/src/tests/test262/built-ins/Array/S15.4.5.1_A2.3_T1.js
new file mode 100644
index 0000000000..9a0a14eaba
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/S15.4.5.1_A2.3_T1.js
@@ -0,0 +1,19 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    If ToUint32(P) is less than the value of
+    the length property of A, change (or set) length to ToUint32(P)+1
+es5id: 15.4.5.1_A2.3_T1
+description: length = 100, P in [100, 199]
+---*/
+
+var x = Array(100);
+x[100] = 1;
+assert.sameValue(x.length, 101, 'The value of x.length is expected to be 101');
+
+x[199] = 1;
+assert.sameValue(x.length, 200, 'The value of x.length is expected to be 200');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/S15.4.5.2_A1_T1.js b/js/src/tests/test262/built-ins/Array/S15.4.5.2_A1_T1.js
new file mode 100644
index 0000000000..6da4cde919
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/S15.4.5.2_A1_T1.js
@@ -0,0 +1,28 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    Every Array object has a length property whose value is
+    always a nonnegative integer less than 2^32. The value of the length property is
+    numerically greater than the name of every property whose name is an array index
+es5id: 15.4.5.2_A1_T1
+description: Checking boundary points
+---*/
+
+var x = [];
+assert.sameValue(x.length, 0, 'The value of x.length is expected to be 0');
+
+x[0] = 1;
+assert.sameValue(x.length, 1, 'The value of x.length is expected to be 1');
+
+x[1] = 1;
+assert.sameValue(x.length, 2, 'The value of x.length is expected to be 2');
+
+x[2147483648] = 1;
+assert.sameValue(x.length, 2147483649, 'The value of x.length is expected to be 2147483649');
+
+x[4294967294] = 1;
+assert.sameValue(x.length, 4294967295, 'The value of x.length is expected to be 4294967295');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/S15.4.5.2_A1_T2.js b/js/src/tests/test262/built-ins/Array/S15.4.5.2_A1_T2.js
new file mode 100644
index 0000000000..7cca401c04
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/S15.4.5.2_A1_T2.js
@@ -0,0 +1,22 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    Every Array object has a length property whose value is
+    always a nonnegative integer less than 2^32. The value of the length property is
+    numerically greater than the name of every property whose name is an array index
+es5id: 15.4.5.2_A1_T2
+description: P = "2^32 - 1" is not index array
+---*/
+
+var x = [];
+x[4294967295] = 1;
+assert.sameValue(x.length, 0, 'The value of x.length is expected to be 0');
+
+var y = [];
+y[1] = 1;
+y[4294967295] = 1;
+assert.sameValue(y.length, 2, 'The value of y.length is expected to be 2');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/S15.4.5.2_A2_T1.js b/js/src/tests/test262/built-ins/Array/S15.4.5.2_A2_T1.js
new file mode 100644
index 0000000000..f4f37defe3
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/S15.4.5.2_A2_T1.js
@@ -0,0 +1,24 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    If a property is added whose name is an array index,
+    the length property is changed
+es5id: 15.4.5.2_A2_T1
+description: Checking length property
+---*/
+
+var x = [];
+assert.sameValue(x.length, 0, 'The value of x.length is expected to be 0');
+
+x[0] = 1;
+assert.sameValue(x.length, 1, 'The value of x.length is expected to be 1');
+
+x[1] = 1;
+assert.sameValue(x.length, 2, 'The value of x.length is expected to be 2');
+
+x[9] = 1;
+assert.sameValue(x.length, 10, 'The value of x.length is expected to be 10');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/S15.4.5.2_A3_T1.js b/js/src/tests/test262/built-ins/Array/S15.4.5.2_A3_T1.js
new file mode 100644
index 0000000000..bf423b476c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/S15.4.5.2_A3_T1.js
@@ -0,0 +1,23 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    If the length property is changed, every property whose name
+    is an array index whose value is not smaller than the new length is automatically deleted
+es5id: 15.4.5.2_A3_T1
+description: >
+    If new length greater than the name of every property whose name
+    is an array index
+---*/
+
+var x = [];
+x.length = 1;
+assert.sameValue(x.length, 1, 'The value of x.length is expected to be 1');
+
+x[5] = 1;
+x.length = 10;
+assert.sameValue(x.length, 10, 'The value of x.length is expected to be 10');
+assert.sameValue(x[5], 1, 'The value of x[5] is expected to be 1');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/S15.4.5.2_A3_T2.js b/js/src/tests/test262/built-ins/Array/S15.4.5.2_A3_T2.js
new file mode 100644
index 0000000000..1a7de49f02
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/S15.4.5.2_A3_T2.js
@@ -0,0 +1,32 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    If the length property is changed, every property whose name
+    is an array index whose value is not smaller than the new length is automatically deleted
+es5id: 15.4.5.2_A3_T2
+description: >
+    If new length greater than the name of every property whose name
+    is an array index
+---*/
+
+var x = [];
+x[1] = 1;
+x[3] = 3;
+x[5] = 5;
+x.length = 4;
+assert.sameValue(x.length, 4, 'The value of x.length is expected to be 4');
+assert.sameValue(x[5], undefined, 'The value of x[5] is expected to equal undefined');
+assert.sameValue(x[3], 3, 'The value of x[3] is expected to be 3');
+
+x.length = new Number(6);
+assert.sameValue(x[5], undefined, 'The value of x[5] is expected to equal undefined');
+
+x.length = 0;
+assert.sameValue(x[0], undefined, 'The value of x[0] is expected to equal undefined');
+
+x.length = 1;
+assert.sameValue(x[1], undefined, 'The value of x[1] is expected to equal undefined');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/S15.4.5.2_A3_T3.js b/js/src/tests/test262/built-ins/Array/S15.4.5.2_A3_T3.js
new file mode 100644
index 0000000000..63bee67493
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/S15.4.5.2_A3_T3.js
@@ -0,0 +1,28 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    If the length property is changed, every property whose name
+    is an array index whose value is not smaller than the new length is automatically deleted
+es5id: 15.4.5.2_A3_T3
+description: "[[Put]] (length, 4294967296)"
+---*/
+
+var x = [];
+x.length = 4294967295;
+assert.sameValue(x.length, 4294967295, 'The value of x.length is expected to be 4294967295');
+
+try {
+  x = [];
+  x.length = 4294967296;
+  throw new Test262Error('#2.1: x = []; x.length = 4294967296 throw RangeError. Actual: x.length === ' + (x.length));
+} catch (e) {
+  assert.sameValue(
+    e instanceof RangeError,
+    true,
+    'The result of evaluating (e instanceof RangeError) is expected to be true'
+  );
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/S15.4_A1.1_T10.js b/js/src/tests/test262/built-ins/Array/S15.4_A1.1_T10.js
new file mode 100644
index 0000000000..6ba208ed86
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/S15.4_A1.1_T10.js
@@ -0,0 +1,25 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    A property name P (in the form of a string value) is an array index
+    if and only if ToString(ToUint32(P)) is equal to P and ToUint32(P) is not equal to 2^32 - 1
+es5id: 15.4_A1.1_T10
+description: Array index is power of two
+---*/
+
+var x = [];
+var k = 1;
+for (var i = 0; i < 32; i++) {
+  k = k * 2;
+  x[k - 2] = k;
+}
+
+k = 1;
+for (i = 0; i < 32; i++) {
+  k = k * 2;
+  assert.sameValue(x[k - 2], k, 'The value of x[k - 2] is expected to equal the value of k');
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/S15.4_A1.1_T4.js b/js/src/tests/test262/built-ins/Array/S15.4_A1.1_T4.js
new file mode 100644
index 0000000000..8918ed2b08
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/S15.4_A1.1_T4.js
@@ -0,0 +1,20 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    A property name P (in the form of a string value) is an array index
+    if and only if ToString(ToUint32(P)) is equal to P and ToUint32(P) is not equal to 2^32 - 1
+es5id: 15.4_A1.1_T4
+description: Checking for string primitive
+---*/
+
+var x = [];
+x["0"] = 0;
+assert.sameValue(x[0], 0, 'The value of x[0] is expected to be 0');
+
+var y = [];
+y["1"] = 1;
+assert.sameValue(y[1], 1, 'The value of y[1] is expected to be 1');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/S15.4_A1.1_T5.js b/js/src/tests/test262/built-ins/Array/S15.4_A1.1_T5.js
new file mode 100644
index 0000000000..eced3ea7c4
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/S15.4_A1.1_T5.js
@@ -0,0 +1,22 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    A property name P (in the form of a string value) is an array index
+    if and only if ToString(ToUint32(P)) is equal to P and ToUint32(P) is not equal to 2^32 - 1
+es5id: 15.4_A1.1_T5
+description: Checking for null and undefined
+---*/
+
+var x = [];
+x[null] = 0;
+assert.sameValue(x[0], undefined, 'The value of x[0] is expected to equal undefined');
+assert.sameValue(x["null"], 0, 'The value of x["null"] is expected to be 0');
+
+var y = [];
+y[undefined] = 0;
+assert.sameValue(y[0], undefined, 'The value of y[0] is expected to equal undefined');
+assert.sameValue(y["undefined"], 0, 'The value of y["undefined"] is expected to be 0');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/S15.4_A1.1_T6.js b/js/src/tests/test262/built-ins/Array/S15.4_A1.1_T6.js
new file mode 100644
index 0000000000..ba9403e479
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/S15.4_A1.1_T6.js
@@ -0,0 +1,21 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    A property name P (in the form of a string value) is an array index
+    if and only if ToString(ToUint32(P)) is equal to P and ToUint32(P) is not equal to 2^32 - 1
+es5id: 15.4_A1.1_T6
+description: Checking for Boolean object
+---*/
+
+var x = [];
+x[new Boolean(true)] = 1;
+assert.sameValue(x[1], undefined, 'The value of x[1] is expected to equal undefined');
+assert.sameValue(x["true"], 1, 'The value of x["true"] is expected to be 1');
+
+x[new Boolean(false)] = 0;
+assert.sameValue(x[0], undefined, 'The value of x[0] is expected to equal undefined');
+assert.sameValue(x["false"], 0, 'The value of x["false"] is expected to be 0');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/S15.4_A1.1_T7.js b/js/src/tests/test262/built-ins/Array/S15.4_A1.1_T7.js
new file mode 100644
index 0000000000..119c825b16
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/S15.4_A1.1_T7.js
@@ -0,0 +1,24 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    A property name P (in the form of a string value) is an array index
+    if and only if ToString(ToUint32(P)) is equal to P and ToUint32(P) is not equal to 2^32 - 1
+es5id: 15.4_A1.1_T7
+description: Checking for Number object
+---*/
+
+var x = [];
+x[new Number(0)] = 0;
+assert.sameValue(x[0], 0, 'The value of x[0] is expected to be 0');
+
+var y = [];
+y[new Number(1)] = 1;
+assert.sameValue(y[1], 1, 'The value of y[1] is expected to be 1');
+
+var z = [];
+z[new Number(1.1)] = 1;
+assert.sameValue(z["1.1"], 1, 'The value of z["1.1"] is expected to be 1');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/S15.4_A1.1_T8.js b/js/src/tests/test262/built-ins/Array/S15.4_A1.1_T8.js
new file mode 100644
index 0000000000..feb6e094a0
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/S15.4_A1.1_T8.js
@@ -0,0 +1,24 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    A property name P (in the form of a string value) is an array index
+    if and only if ToString(ToUint32(P)) is equal to P and ToUint32(P) is not equal to 2^32 - 1
+es5id: 15.4_A1.1_T8
+description: Checking for Number object
+---*/
+
+var x = [];
+x[new String("0")] = 0;
+assert.sameValue(x[0], 0, 'The value of x[0] is expected to be 0');
+
+var y = [];
+y[new String("1")] = 1;
+assert.sameValue(y[1], 1, 'The value of y[1] is expected to be 1');
+
+var z = [];
+z[new String("1.1")] = 1;
+assert.sameValue(z["1.1"], 1, 'The value of z["1.1"] is expected to be 1');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/S15.4_A1.1_T9.js b/js/src/tests/test262/built-ins/Array/S15.4_A1.1_T9.js
new file mode 100644
index 0000000000..2b56d5a27b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/S15.4_A1.1_T9.js
@@ -0,0 +1,121 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    A property name P (in the form of a string value) is an array index
+    if and only if ToString(ToUint32(P)) is equal to P and ToUint32(P) is not equal to 2^32 - 1
+es5id: 15.4_A1.1_T9
+description: If Type(value) is Object, evaluate ToPrimitive(value, String)
+---*/
+
+var x = [];
+var object = {
+  valueOf: function() {
+    return 1
+  }
+};
+x[object] = 0;
+assert.sameValue(x["[object Object]"], 0, 'The value of x["[object Object]"] is expected to be 0');
+
+x = [];
+var object = {
+  valueOf: function() {
+    return 1
+  },
+  toString: function() {
+    return 0
+  }
+};
+x[object] = 0;
+assert.sameValue(x[0], 0, 'The value of x[0] is expected to be 0');
+
+x = [];
+var object = {
+  valueOf: function() {
+    return 1
+  },
+  toString: function() {
+    return {}
+  }
+};
+x[object] = 0;
+assert.sameValue(x[1], 0, 'The value of x[1] is expected to be 0');
+
+try {
+  x = [];
+  var object = {
+    valueOf: function() {
+      throw "error"
+    },
+    toString: function() {
+      return 1
+    }
+  };
+  x[object] = 0;
+  assert.sameValue(x[1], 0, 'The value of x[1] is expected to be 0');
+}
+catch (e) {
+  assert.notSameValue(e, "error", 'The value of e is not "error"');
+}
+
+x = [];
+var object = {
+  toString: function() {
+    return 1
+  }
+};
+x[object] = 0;
+assert.sameValue(x[1], 0, 'The value of x[1] is expected to be 0');
+
+x = [];
+var object = {
+  valueOf: function() {
+    return {}
+  },
+  toString: function() {
+    return 1
+  }
+}
+x[object] = 0;
+assert.sameValue(x[1], 0, 'The value of x[1] is expected to be 0');
+
+try {
+  x = [];
+  var object = {
+    valueOf: function() {
+      return 1
+    },
+    toString: function() {
+      throw "error"
+    }
+  };
+  x[object];
+  throw new Test262Error('#7.1: x = []; var object = {valueOf: function() {return 1}, toString: function() {throw "error"}}; x[object] throw "error". Actual: ' + (x[object]));
+}
+catch (e) {
+  assert.sameValue(e, "error", 'The value of e is expected to be "error"');
+}
+
+try {
+  x = [];
+  var object = {
+    valueOf: function() {
+      return {}
+    },
+    toString: function() {
+      return {}
+    }
+  };
+  x[object];
+  throw new Test262Error('#8.1: x = []; var object = {valueOf: function() {return {}}, toString: function() {return {}}}; x[object] throw TypeError. Actual: ' + (x[object]));
+}
+catch (e) {
+  assert.sameValue(
+    e instanceof TypeError,
+    true,
+    'The result of evaluating (e instanceof TypeError) is expected to be true'
+  );
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/Symbol.species/browser.js b/js/src/tests/test262/built-ins/Array/Symbol.species/browser.js
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/js/src/tests/test262/built-ins/Array/Symbol.species/length.js b/js/src/tests/test262/built-ins/Array/Symbol.species/length.js
new file mode 100644
index 0000000000..a0744b86ae
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/Symbol.species/length.js
@@ -0,0 +1,34 @@
+// Copyright (C) 2015 André Bargull. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es6id: 22.1.2.5
+description: >
+  get Array [ @@species ].length is 0.
+info: |
+  get Array [ @@species ]
+
+  17 ECMAScript Standard Built-in Objects:
+    Every built-in Function object, including constructors, has a length
+    property whose value is an integer. Unless otherwise specified, this
+    value is equal to the largest number of named arguments shown in the
+    subclause headings for the function description, including optional
+    parameters. However, rest parameters shown using the form “...name”
+    are not included in the default argument count.
+
+    Unless otherwise specified, the length property of a built-in Function
+    object has the attributes { [[Writable]]: false, [[Enumerable]]: false,
+    [[Configurable]]: true }.
+includes: [propertyHelper.js]
+features: [Symbol.species]
+---*/
+
+var desc = Object.getOwnPropertyDescriptor(Array, Symbol.species);
+
+assert.sameValue(desc.get.length, 0);
+
+verifyNotEnumerable(desc.get, "length");
+verifyNotWritable(desc.get, "length");
+verifyConfigurable(desc.get, "length");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/Symbol.species/return-value.js b/js/src/tests/test262/built-ins/Array/Symbol.species/return-value.js
new file mode 100644
index 0000000000..96c47838e1
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/Symbol.species/return-value.js
@@ -0,0 +1,16 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-get-array-@@species
+description: Return value of @@species accessor method
+info: |
+    1. Return the this value.
+features: [Symbol.species]
+---*/
+
+var thisVal = {};
+var accessor = Object.getOwnPropertyDescriptor(Array, Symbol.species).get;
+
+assert.sameValue(accessor.call(thisVal), thisVal);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/Symbol.species/shell.js b/js/src/tests/test262/built-ins/Array/Symbol.species/shell.js
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/js/src/tests/test262/built-ins/Array/Symbol.species/symbol-species-name.js b/js/src/tests/test262/built-ins/Array/Symbol.species/symbol-species-name.js
new file mode 100644
index 0000000000..8c943ef709
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/Symbol.species/symbol-species-name.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 22.1.2.5
+description: >
+  Array[Symbol.species] accessor property get name
+info: |
+  22.1.2.5 get Array [ @@species ]
+
+  ...
+  The value of the name property of this function is "get [Symbol.species]".
+features: [Symbol.species]
+includes: [propertyHelper.js]
+---*/
+
+var descriptor = Object.getOwnPropertyDescriptor(Array, Symbol.species);
+
+assert.sameValue(
+  descriptor.get.name,
+  'get [Symbol.species]'
+);
+
+verifyNotEnumerable(descriptor.get, 'name');
+verifyNotWritable(descriptor.get, 'name');
+verifyConfigurable(descriptor.get, 'name');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/Symbol.species/symbol-species.js b/js/src/tests/test262/built-ins/Array/Symbol.species/symbol-species.js
new file mode 100644
index 0000000000..5aa214e570
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/Symbol.species/symbol-species.js
@@ -0,0 +1,23 @@
+// Copyright 2015 Cubane Canada, Inc.  All rights reserved.
+// See LICENSE for details.
+
+/*---
+info: |
+ Array has a property at `Symbol.species`
+esid: sec-get-array-@@species
+author: Sam Mikes
+description: Array[Symbol.species] exists per spec
+includes: [propertyHelper.js]
+features: [Symbol.species]
+---*/
+
+var desc = Object.getOwnPropertyDescriptor(Array, Symbol.species);
+
+assert.sameValue(desc.set, undefined);
+assert.sameValue(typeof desc.get, 'function');
+
+verifyNotWritable(Array, Symbol.species, Symbol.species);
+verifyNotEnumerable(Array, Symbol.species);
+verifyConfigurable(Array, Symbol.species);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/browser.js b/js/src/tests/test262/built-ins/Array/browser.js
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/js/src/tests/test262/built-ins/Array/constructor.js b/js/src/tests/test262/built-ins/Array/constructor.js
new file mode 100644
index 0000000000..294e63ad80
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/constructor.js
@@ -0,0 +1,12 @@
+// Copyright (C) 2017 Leo Balter. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array-constructor-array
+description: >
+  The Array constructor is a built-in function
+---*/
+
+assert.sameValue(typeof Array, 'function', 'The value of `typeof Array` is expected to be "function"');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/from/Array.from-descriptor.js b/js/src/tests/test262/built-ins/Array/from/Array.from-descriptor.js
new file mode 100644
index 0000000000..4d68536a30
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/from/Array.from-descriptor.js
@@ -0,0 +1,14 @@
+// Copyright 2015 Microsoft Corporation. All rights reserved.
+// This code is governed by the license found in the LICENSE file.
+
+/*---
+description: Testing descriptor property of Array.from
+includes: [propertyHelper.js]
+esid: sec-array.from
+---*/
+
+verifyWritable(Array, "from");
+verifyNotEnumerable(Array, "from");
+verifyConfigurable(Array, "from");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/from/Array.from-name.js b/js/src/tests/test262/built-ins/Array/from/Array.from-name.js
new file mode 100644
index 0000000000..267647c639
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/from/Array.from-name.js
@@ -0,0 +1,32 @@
+// Copyright 2015 Microsoft Corporation. All rights reserved.
+// This code is governed by the license found in the LICENSE file.
+/*---
+esid: sec-array.from
+description: '`name` property'
+info: |
+    ES6 Section 17:
+
+    Every built-in Function object, including constructors, that is not
+    identified as an anonymous function has a name property whose value is a
+    String. Unless otherwise specified, this value is the name that is given to
+    the function in this specification.
+
+    [...]
+
+    Unless otherwise specified, the name property of a built-in Function
+    object, if it exists, has the attributes { [[Writable]]: false,
+    [[Enumerable]]: false, [[Configurable]]: true }.
+includes: [propertyHelper.js]
+---*/
+
+assert.sameValue(
+  Array.from.name,
+  'from',
+  'The value of Array.from.name is expected to be "from"'
+);
+
+verifyNotEnumerable(Array.from, 'name');
+verifyNotWritable(Array.from, 'name');
+verifyConfigurable(Array.from, 'name');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/from/Array.from_arity.js b/js/src/tests/test262/built-ins/Array/from/Array.from_arity.js
new file mode 100644
index 0000000000..68b3287765
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/from/Array.from_arity.js
@@ -0,0 +1,23 @@
+// Copyright (c) 2014 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+/*---
+esid: sec-array.from
+description: >
+  The length property of the Array.from method is 1.
+info: |
+  22.1.2.1 Array.from ( items [ , mapfn [ , thisArg ] ] )
+
+  ...
+
+  The length property of the from method is 1.
+includes: [propertyHelper.js]
+---*/
+
+assert.sameValue(Array.from.length, 1, 'The value of Array.from.length is expected to be 1');
+
+verifyNotEnumerable(Array.from, 'length');
+verifyNotWritable(Array.from, 'length');
+verifyConfigurable(Array.from, 'length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/from/Array.from_forwards-length-for-array-likes.js b/js/src/tests/test262/built-ins/Array/from/Array.from_forwards-length-for-array-likes.js
new file mode 100644
index 0000000000..8bb73635ee
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/from/Array.from_forwards-length-for-array-likes.js
@@ -0,0 +1,41 @@
+// Copyright (c) 2014 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+/*---
+esid: sec-array.from
+description: >
+  If this is a constructor, and items doesn't have an @@iterator,
+  returns a new instance of this
+info: |
+  22.1.2.1 Array.from ( items [ , mapfn [ , thisArg ] ] )
+
+  4. Let usingIterator be GetMethod(items, @@iterator).
+  ...
+  6. If usingIterator is not undefined, then
+  ...
+  12. If IsConstructor(C) is true, then
+    a. Let A be Construct(C, «len»).
+  13. Else,
+    a. Let A be ArrayCreate(len).
+  ...
+  19. Return A.
+---*/
+
+var result;
+
+function MyCollection() {
+  this.args = arguments;
+}
+
+result = Array.from.call(MyCollection, {
+  length: 42
+});
+
+assert.sameValue(result.args.length, 1, 'The value of result.args.length is expected to be 1');
+assert.sameValue(result.args[0], 42, 'The value of result.args[0] is expected to be 42');
+assert(
+  result instanceof MyCollection,
+  'The result of evaluating (result instanceof MyCollection) is expected to be true'
+);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/from/array-like-has-length-but-no-indexes-with-values.js b/js/src/tests/test262/built-ins/Array/from/array-like-has-length-but-no-indexes-with-values.js
new file mode 100644
index 0000000000..e83db0f656
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/from/array-like-has-length-but-no-indexes-with-values.js
@@ -0,0 +1,41 @@
+// Copyright (c) 2021 Rick Waldron.  All rights reserved.
+// This code is governed by the license found in the LICENSE file.
+
+/*---
+esid: sec-array.from
+description: >
+    Creates an array with length that is equal to the value of the
+    length property of the given array-like, regardless of
+    the presence of corresponding indices and values.
+info: |
+    Array.from ( items [ , mapfn [ , thisArg ] ] )
+
+    7. Let arrayLike be ! ToObject(items).
+    8. Let len be ? LengthOfArrayLike(arrayLike).
+    9. If IsConstructor(C) is true, then
+      a. Let A be ? Construct(C, « 𝔽(len) »).
+    10. Else,
+      a. Let A be ? ArrayCreate(len).
+
+includes: [compareArray.js]
+---*/
+
+const length = 5;
+
+const newlyCreatedArray = Array.from({ length });
+assert.sameValue(
+  newlyCreatedArray.length,
+  length,
+  "The newly created array's length is equal to the value of the length property for the provided array like object"
+);
+assert.compareArray(newlyCreatedArray, [undefined, undefined, undefined, undefined, undefined]);
+
+const newlyCreatedAndMappedArray = Array.from({ length }).map(x => 1);
+assert.sameValue(
+  newlyCreatedAndMappedArray.length,
+  length,
+  "The newly created and mapped array's length is equal to the value of the length property for the provided array like object"
+);
+assert.compareArray(newlyCreatedAndMappedArray, [1, 1, 1, 1, 1]);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/from/browser.js b/js/src/tests/test262/built-ins/Array/from/browser.js
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/js/src/tests/test262/built-ins/Array/from/calling-from-valid-1-noStrict.js b/js/src/tests/test262/built-ins/Array/from/calling-from-valid-1-noStrict.js
new file mode 100644
index 0000000000..21eb245493
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/from/calling-from-valid-1-noStrict.js
@@ -0,0 +1,68 @@
+// Copyright 2015 Microsoft Corporation. All rights reserved.
+// This code is governed by the license found in the LICENSE file.
+/*---
+esid: sec-array.from
+description: Map function without thisArg on non strict mode
+info: |
+  22.1.2.1 Array.from ( items [ , mapfn [ , thisArg ] ] )
+
+  ...
+  10. Let len be ToLength(Get(arrayLike, "length")).
+  11. ReturnIfAbrupt(len).
+  12. If IsConstructor(C) is true, then
+    a. Let A be Construct(C, «len»).
+  13. Else,
+    b. Let A be ArrayCreate(len).
+  14. ReturnIfAbrupt(A).
+  15. Let k be 0.
+  16. Repeat, while k < len
+    a. Let Pk be ToString(k).
+    b. Let kValue be Get(arrayLike, Pk).
+    c. ReturnIfAbrupt(kValue).
+    d. If mapping is true, then
+      i. Let mappedValue be Call(mapfn, T, «kValue, k»).
+  ...
+flags: [noStrict]
+---*/
+
+var list = {
+  '0': 41,
+  '1': 42,
+  '2': 43,
+  length: 3
+};
+var calls = [];
+
+function mapFn(value) {
+  calls.push({
+    args: arguments,
+    thisArg: this
+  });
+  return value * 2;
+}
+
+var result = Array.from(list, mapFn);
+
+assert.sameValue(result.length, 3, 'The value of result.length is expected to be 3');
+assert.sameValue(result[0], 82, 'The value of result[0] is expected to be 82');
+assert.sameValue(result[1], 84, 'The value of result[1] is expected to be 84');
+assert.sameValue(result[2], 86, 'The value of result[2] is expected to be 86');
+
+assert.sameValue(calls.length, 3, 'The value of calls.length is expected to be 3');
+
+assert.sameValue(calls[0].args.length, 2, 'The value of calls[0].args.length is expected to be 2');
+assert.sameValue(calls[0].args[0], 41, 'The value of calls[0].args[0] is expected to be 41');
+assert.sameValue(calls[0].args[1], 0, 'The value of calls[0].args[1] is expected to be 0');
+assert.sameValue(calls[0].thisArg, this, 'The value of calls[0].thisArg is expected to be this');
+
+assert.sameValue(calls[1].args.length, 2, 'The value of calls[1].args.length is expected to be 2');
+assert.sameValue(calls[1].args[0], 42, 'The value of calls[1].args[0] is expected to be 42');
+assert.sameValue(calls[1].args[1], 1, 'The value of calls[1].args[1] is expected to be 1');
+assert.sameValue(calls[1].thisArg, this, 'The value of calls[1].thisArg is expected to be this');
+
+assert.sameValue(calls[2].args.length, 2, 'The value of calls[2].args.length is expected to be 2');
+assert.sameValue(calls[2].args[0], 43, 'The value of calls[2].args[0] is expected to be 43');
+assert.sameValue(calls[2].args[1], 2, 'The value of calls[2].args[1] is expected to be 2');
+assert.sameValue(calls[2].thisArg, this, 'The value of calls[2].thisArg is expected to be this');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/from/calling-from-valid-1-onlyStrict-strict.js b/js/src/tests/test262/built-ins/Array/from/calling-from-valid-1-onlyStrict-strict.js
new file mode 100644
index 0000000000..415c0f8a35
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/from/calling-from-valid-1-onlyStrict-strict.js
@@ -0,0 +1,69 @@
+'use strict';
+// Copyright 2015 Microsoft Corporation. All rights reserved.
+// This code is governed by the license found in the LICENSE file.
+/*---
+esid: sec-array.from
+description: Map function without thisArg on strict mode
+info: |
+  22.1.2.1 Array.from ( items [ , mapfn [ , thisArg ] ] )
+
+  ...
+  10. Let len be ToLength(Get(arrayLike, "length")).
+  11. ReturnIfAbrupt(len).
+  12. If IsConstructor(C) is true, then
+    a. Let A be Construct(C, «len»).
+  13. Else,
+    b. Let A be ArrayCreate(len).
+  14. ReturnIfAbrupt(A).
+  15. Let k be 0.
+  16. Repeat, while k < len
+    a. Let Pk be ToString(k).
+    b. Let kValue be Get(arrayLike, Pk).
+    c. ReturnIfAbrupt(kValue).
+    d. If mapping is true, then
+      i. Let mappedValue be Call(mapfn, T, «kValue, k»).
+  ...
+flags: [onlyStrict]
+---*/
+
+var list = {
+  '0': 41,
+  '1': 42,
+  '2': 43,
+  length: 3
+};
+var calls = [];
+
+function mapFn(value) {
+  calls.push({
+    args: arguments,
+    thisArg: this
+  });
+  return value * 2;
+}
+
+var result = Array.from(list, mapFn);
+
+assert.sameValue(result.length, 3, 'The value of result.length is expected to be 3');
+assert.sameValue(result[0], 82, 'The value of result[0] is expected to be 82');
+assert.sameValue(result[1], 84, 'The value of result[1] is expected to be 84');
+assert.sameValue(result[2], 86, 'The value of result[2] is expected to be 86');
+
+assert.sameValue(calls.length, 3, 'The value of calls.length is expected to be 3');
+
+assert.sameValue(calls[0].args.length, 2, 'The value of calls[0].args.length is expected to be 2');
+assert.sameValue(calls[0].args[0], 41, 'The value of calls[0].args[0] is expected to be 41');
+assert.sameValue(calls[0].args[1], 0, 'The value of calls[0].args[1] is expected to be 0');
+assert.sameValue(calls[0].thisArg, undefined, 'The value of calls[0].thisArg is expected to equal undefined');
+
+assert.sameValue(calls[1].args.length, 2, 'The value of calls[1].args.length is expected to be 2');
+assert.sameValue(calls[1].args[0], 42, 'The value of calls[1].args[0] is expected to be 42');
+assert.sameValue(calls[1].args[1], 1, 'The value of calls[1].args[1] is expected to be 1');
+assert.sameValue(calls[1].thisArg, undefined, 'The value of calls[1].thisArg is expected to equal undefined');
+
+assert.sameValue(calls[2].args.length, 2, 'The value of calls[2].args.length is expected to be 2');
+assert.sameValue(calls[2].args[0], 43, 'The value of calls[2].args[0] is expected to be 43');
+assert.sameValue(calls[2].args[1], 2, 'The value of calls[2].args[1] is expected to be 2');
+assert.sameValue(calls[2].thisArg, undefined, 'The value of calls[2].thisArg is expected to equal undefined');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/from/calling-from-valid-2.js b/js/src/tests/test262/built-ins/Array/from/calling-from-valid-2.js
new file mode 100644
index 0000000000..835f3d3b97
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/from/calling-from-valid-2.js
@@ -0,0 +1,69 @@
+// Copyright 2015 Microsoft Corporation. All rights reserved.
+// This code is governed by the license found in the LICENSE file.
+
+/*---
+esid: sec-array.from
+description: Calling from with a valid map function with thisArg
+info: |
+  22.1.2.1 Array.from ( items [ , mapfn [ , thisArg ] ] )
+
+  ...
+  10. Let len be ToLength(Get(arrayLike, "length")).
+  11. ReturnIfAbrupt(len).
+  12. If IsConstructor(C) is true, then
+    a. Let A be Construct(C, «len»).
+  13. Else,
+    b. Let A be ArrayCreate(len).
+  14. ReturnIfAbrupt(A).
+  15. Let k be 0.
+  16. Repeat, while k < len
+    a. Let Pk be ToString(k).
+    b. Let kValue be Get(arrayLike, Pk).
+    c. ReturnIfAbrupt(kValue).
+    d. If mapping is true, then
+      i. Let mappedValue be Call(mapfn, T, «kValue, k»).
+  ...
+---*/
+
+var list = {
+  '0': 41,
+  '1': 42,
+  '2': 43,
+  length: 3
+};
+var calls = [];
+var thisArg = {};
+
+function mapFn(value) {
+  calls.push({
+    args: arguments,
+    thisArg: this
+  });
+  return value * 2;
+}
+
+var result = Array.from(list, mapFn, thisArg);
+
+assert.sameValue(result.length, 3, 'The value of result.length is expected to be 3');
+assert.sameValue(result[0], 82, 'The value of result[0] is expected to be 82');
+assert.sameValue(result[1], 84, 'The value of result[1] is expected to be 84');
+assert.sameValue(result[2], 86, 'The value of result[2] is expected to be 86');
+
+assert.sameValue(calls.length, 3, 'The value of calls.length is expected to be 3');
+
+assert.sameValue(calls[0].args.length, 2, 'The value of calls[0].args.length is expected to be 2');
+assert.sameValue(calls[0].args[0], 41, 'The value of calls[0].args[0] is expected to be 41');
+assert.sameValue(calls[0].args[1], 0, 'The value of calls[0].args[1] is expected to be 0');
+assert.sameValue(calls[0].thisArg, thisArg, 'The value of calls[0].thisArg is expected to equal the value of thisArg');
+
+assert.sameValue(calls[1].args.length, 2, 'The value of calls[1].args.length is expected to be 2');
+assert.sameValue(calls[1].args[0], 42, 'The value of calls[1].args[0] is expected to be 42');
+assert.sameValue(calls[1].args[1], 1, 'The value of calls[1].args[1] is expected to be 1');
+assert.sameValue(calls[1].thisArg, thisArg, 'The value of calls[1].thisArg is expected to equal the value of thisArg');
+
+assert.sameValue(calls[2].args.length, 2, 'The value of calls[2].args.length is expected to be 2');
+assert.sameValue(calls[2].args[0], 43, 'The value of calls[2].args[0] is expected to be 43');
+assert.sameValue(calls[2].args[1], 2, 'The value of calls[2].args[1] is expected to be 2');
+assert.sameValue(calls[2].thisArg, thisArg, 'The value of calls[2].thisArg is expected to equal the value of thisArg');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/from/elements-added-after.js b/js/src/tests/test262/built-ins/Array/from/elements-added-after.js
new file mode 100644
index 0000000000..7676448d32
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/from/elements-added-after.js
@@ -0,0 +1,40 @@
+// Copyright 2015 Microsoft Corporation. All rights reserved.
+// This code is governed by the license found in the LICENSE file.
+
+/*---
+description: Elements added after the call to from
+esid: sec-array.from
+---*/
+
+var arrayIndex = -1;
+var originalLength = 7;
+var obj = {
+  length: originalLength,
+  0: 2,
+  1: 4,
+  2: 8,
+  3: 16,
+  4: 32,
+  5: 64,
+  6: 128
+};
+var array = [2, 4, 8, 16, 32, 64, 128];
+
+function mapFn(value, index) {
+  arrayIndex++;
+  assert.sameValue(value, obj[arrayIndex], 'The value of value is expected to equal the value of obj[arrayIndex]');
+  assert.sameValue(index, arrayIndex, 'The value of index is expected to equal the value of arrayIndex');
+  obj[originalLength + arrayIndex] = 2 * arrayIndex + 1;
+
+  return obj[arrayIndex];
+}
+
+
+var a = Array.from(obj, mapFn);
+assert.sameValue(a.length, array.length, 'The value of a.length is expected to equal the value of array.length');
+
+for (var j = 0; j < a.length; j++) {
+  assert.sameValue(a[j], array[j], 'The value of a[j] is expected to equal the value of array[j]');
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/from/elements-deleted-after.js b/js/src/tests/test262/built-ins/Array/from/elements-deleted-after.js
new file mode 100644
index 0000000000..5b63a932aa
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/from/elements-deleted-after.js
@@ -0,0 +1,34 @@
+// Copyright 2015 Microsoft Corporation. All rights reserved.
+// This code is governed by the license found in the LICENSE file.
+
+/*---
+description: >
+    Elements deleted after the call started and before visited are not
+    visited
+esid: sec-array.from
+---*/
+
+var originalArray = [0, 1, -2, 4, -8, 16];
+var array = [0, 1, -2, 4, -8, 16];
+var a = [];
+var arrayIndex = -1;
+
+function mapFn(value, index) {
+  this.arrayIndex++;
+  assert.sameValue(value, array[this.arrayIndex], 'The value of value is expected to equal the value of array[this.arrayIndex]');
+  assert.sameValue(index, this.arrayIndex, 'The value of index is expected to equal the value of this.arrayIndex');
+
+  array.splice(array.length - 1, 1);
+  return 127;
+}
+
+
+a = Array.from(array, mapFn, this);
+
+assert.sameValue(a.length, originalArray.length / 2, 'The value of a.length is expected to be originalArray.length / 2');
+
+for (var j = 0; j < originalArray.length / 2; j++) {
+  assert.sameValue(a[j], 127, 'The value of a[j] is expected to be 127');
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/from/elements-updated-after.js b/js/src/tests/test262/built-ins/Array/from/elements-updated-after.js
new file mode 100644
index 0000000000..210aaf5fd4
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/from/elements-updated-after.js
@@ -0,0 +1,29 @@
+// Copyright 2015 Microsoft Corporation. All rights reserved.
+// This code is governed by the license found in the LICENSE file.
+
+/*---
+description: Elements are updated after the call to from
+esid: sec-array.from
+---*/
+
+var array = [127, 4, 8, 16, 32, 64, 128];
+var arrayIndex = -1;
+
+function mapFn(value, index) {
+  arrayIndex++;
+  if (index + 1 < array.length) {
+    array[index + 1] = 127;
+  }
+  assert.sameValue(value, 127, 'The value of value is expected to be 127');
+  assert.sameValue(index, arrayIndex, 'The value of index is expected to equal the value of arrayIndex');
+
+  return value;
+}
+
+var a = Array.from(array, mapFn);
+assert.sameValue(a.length, array.length, 'The value of a.length is expected to equal the value of array.length');
+for (var j = 0; j < a.length; j++) {
+  assert.sameValue(a[j], 127, 'The value of a[j] is expected to be 127');
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/from/from-array.js b/js/src/tests/test262/built-ins/Array/from/from-array.js
new file mode 100644
index 0000000000..708a4779bc
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/from/from-array.js
@@ -0,0 +1,25 @@
+// Copyright 2015 Microsoft Corporation. All rights reserved.
+// This code is governed by the license found in the LICENSE file.
+
+/*---
+description: Passing a valid array
+esid: sec-array.from
+---*/
+
+var array = [0, 'foo', , Infinity];
+var result = Array.from(array);
+
+assert.sameValue(result.length, 4, 'The value of result.length is expected to be 4');
+assert.sameValue(result[0], 0, 'The value of result[0] is expected to be 0');
+assert.sameValue(result[1], 'foo', 'The value of result[1] is expected to be "foo"');
+assert.sameValue(result[2], undefined, 'The value of result[2] is expected to equal undefined');
+assert.sameValue(result[3], Infinity, 'The value of result[3] is expected to equal Infinity');
+
+assert.notSameValue(
+  result, array,
+  'The value of result is expected to not equal the value of `array`'
+);
+
+assert(result instanceof Array, 'The result of evaluating (result instanceof Array) is expected to be true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/from/from-string.js b/js/src/tests/test262/built-ins/Array/from/from-string.js
new file mode 100644
index 0000000000..88772a85ec
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/from/from-string.js
@@ -0,0 +1,19 @@
+// Copyright (c) 2014 Hank Yates. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.from
+description: Testing Array.from when passed a String
+author: Hank Yates (hankyates@gmail.com)
+---*/
+
+var arrLikeSource = 'Test';
+var result = Array.from(arrLikeSource);
+
+assert.sameValue(result.length, 4, 'The value of result.length is expected to be 4');
+assert.sameValue(result[0], 'T', 'The value of result[0] is expected to be "T"');
+assert.sameValue(result[1], 'e', 'The value of result[1] is expected to be "e"');
+assert.sameValue(result[2], 's', 'The value of result[2] is expected to be "s"');
+assert.sameValue(result[3], 't', 'The value of result[3] is expected to be "t"');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/from/get-iter-method-err.js b/js/src/tests/test262/built-ins/Array/from/get-iter-method-err.js
new file mode 100644
index 0000000000..c7795c53d1
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/from/get-iter-method-err.js
@@ -0,0 +1,24 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.from
+description: Error accessing items' `Symbol.iterator` attribute
+info: |
+    [...]
+    4. Let usingIterator be GetMethod(items, @@iterator).
+    5. ReturnIfAbrupt(usingIterator).
+features: [Symbol.iterator]
+---*/
+
+var items = {};
+Object.defineProperty(items, Symbol.iterator, {
+  get: function() {
+    throw new Test262Error();
+  }
+});
+
+assert.throws(Test262Error, function() {
+  Array.from(items);
+}, 'Array.from(items) throws a Test262Error exception');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/from/items-is-arraybuffer.js b/js/src/tests/test262/built-ins/Array/from/items-is-arraybuffer.js
new file mode 100644
index 0000000000..6a93179741
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/from/items-is-arraybuffer.js
@@ -0,0 +1,21 @@
+// Copyright 2015 Leonardo Balter. All rights reserved.
+// This code is governed by the license found in the LICENSE file.
+/*---
+esid: sec-array.from
+description: Return empty array if items argument is an ArrayBuffer
+info: |
+  22.1.2.1 Array.from ( items [ , mapfn [ , thisArg ] ] )
+
+  ...
+  4. Let usingIterator be GetMethod(items, @@iterator).
+  5. ReturnIfAbrupt(usingIterator).
+  ...
+---*/
+
+var arrayBuffer = new ArrayBuffer(7);
+
+var result = Array.from(arrayBuffer);
+
+assert.sameValue(result.length, 0, 'The value of result.length is expected to be 0');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/from/items-is-null-throws.js b/js/src/tests/test262/built-ins/Array/from/items-is-null-throws.js
new file mode 100644
index 0000000000..4142bc2553
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/from/items-is-null-throws.js
@@ -0,0 +1,19 @@
+// Copyright 2015 Leonardo Balter. All rights reserved.
+// This code is governed by the license found in the LICENSE file.
+/*---
+esid: sec-array.from
+description: Throws a TypeError if items argument is null
+info: |
+  22.1.2.1 Array.from ( items [ , mapfn [ , thisArg ] ] )
+
+  ...
+  4. Let usingIterator be GetMethod(items, @@iterator).
+  5. ReturnIfAbrupt(usingIterator).
+  ...
+---*/
+
+assert.throws(TypeError, function() {
+  Array.from(null);
+}, 'Array.from(null) throws a TypeError exception');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/from/iter-adv-err.js b/js/src/tests/test262/built-ins/Array/from/iter-adv-err.js
new file mode 100644
index 0000000000..66030a8e68
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/from/iter-adv-err.js
@@ -0,0 +1,30 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.from
+description: Error advancing iterator
+info: |
+    [...]
+    6. If usingIterator is not undefined, then
+       [...]
+       g. Repeat
+          i. Let Pk be ToString(k).
+          ii. Let next be IteratorStep(iterator).
+          iii. ReturnIfAbrupt(next).
+features: [Symbol.iterator]
+---*/
+
+var items = {};
+items[Symbol.iterator] = function() {
+  return {
+    next: function() {
+      throw new Test262Error();
+    }
+  };
+};
+
+assert.throws(Test262Error, function() {
+  Array.from(items);
+}, 'Array.from(items) throws a Test262Error exception');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/from/iter-cstm-ctor-err.js b/js/src/tests/test262/built-ins/Array/from/iter-cstm-ctor-err.js
new file mode 100644
index 0000000000..5b54e6d9e9
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/from/iter-cstm-ctor-err.js
@@ -0,0 +1,28 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.from
+description: >
+    Error creating object with custom constructor (traversed via iterator)
+info: |
+    [...]
+    6. If usingIterator is not undefined, then
+       a. If IsConstructor(C) is true, then
+          i. Let A be Construct(C).
+       b. Else,
+          i. Let A be ArrayCreate(0).
+       c. ReturnIfAbrupt(A).
+features: [Symbol.iterator]
+---*/
+
+var C = function() {
+  throw new Test262Error();
+};
+var items = {};
+items[Symbol.iterator] = function() {};
+
+assert.throws(Test262Error, function() {
+  Array.from.call(C, items);
+}, 'Array.from.call(C, items) throws a Test262Error exception');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/from/iter-cstm-ctor.js b/js/src/tests/test262/built-ins/Array/from/iter-cstm-ctor.js
new file mode 100644
index 0000000000..28922e7062
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/from/iter-cstm-ctor.js
@@ -0,0 +1,50 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.from
+description: Creating object with custom constructor (traversed via iterator)
+info: |
+    [...]
+    6. If usingIterator is not undefined, then
+       a. If IsConstructor(C) is true, then
+          i. Let A be Construct(C).
+       b. Else,
+          i. Let A be ArrayCreate(0).
+       c. ReturnIfAbrupt(A).
+features: [Symbol.iterator]
+---*/
+
+var thisVal, args;
+var callCount = 0;
+var C = function() {
+  thisVal = this;
+  args = arguments;
+  callCount += 1;
+};
+var result;
+var items = {};
+items[Symbol.iterator] = function() {
+  return {
+    next: function() {
+      return {
+        done: true
+      };
+    }
+  };
+};
+
+result = Array.from.call(C, items);
+
+assert(
+  result instanceof C, 'The result of evaluating (result instanceof C) is expected to be true'
+);
+assert.sameValue(
+  result.constructor,
+  C,
+  'The value of result.constructor is expected to equal the value of C'
+);
+assert.sameValue(callCount, 1, 'The value of callCount is expected to be 1');
+assert.sameValue(thisVal, result, 'The value of thisVal is expected to equal the value of result');
+assert.sameValue(args.length, 0, 'The value of args.length is expected to be 0');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/from/iter-get-iter-err.js b/js/src/tests/test262/built-ins/Array/from/iter-get-iter-err.js
new file mode 100644
index 0000000000..278207b6b8
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/from/iter-get-iter-err.js
@@ -0,0 +1,24 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.from
+description: Error creating iterator object
+info: |
+    [...]
+    6. If usingIterator is not undefined, then
+       [...]
+       d. Let iterator be GetIterator(items, usingIterator).
+       e. ReturnIfAbrupt(iterator).
+features: [Symbol.iterator]
+---*/
+
+var itemsPoisonedSymbolIterator = {};
+itemsPoisonedSymbolIterator[Symbol.iterator] = function() {
+  throw new Test262Error();
+};
+
+assert.throws(Test262Error, function() {
+  Array.from(itemsPoisonedSymbolIterator);
+}, 'Array.from(itemsPoisonedSymbolIterator) throws a Test262Error exception');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/from/iter-get-iter-val-err.js b/js/src/tests/test262/built-ins/Array/from/iter-get-iter-val-err.js
new file mode 100644
index 0000000000..c7ce81ce0b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/from/iter-get-iter-val-err.js
@@ -0,0 +1,36 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.from
+description: Error retrieving value of iterator result
+info: |
+    [...]
+    6. If usingIterator is not undefined, then
+       [...]
+       g. Repeat
+          [...]
+          v. Let nextValue be IteratorValue(next).
+          vi. ReturnIfAbrupt(nextValue).
+features: [Symbol.iterator]
+---*/
+
+var itemsPoisonedIteratorValue = {};
+var poisonedValue = {};
+Object.defineProperty(poisonedValue, 'value', {
+  get: function() {
+    throw new Test262Error();
+  }
+});
+itemsPoisonedIteratorValue[Symbol.iterator] = function() {
+  return {
+    next: function() {
+      return poisonedValue;
+    }
+  };
+};
+
+assert.throws(Test262Error, function() {
+  Array.from(itemsPoisonedIteratorValue);
+}, 'Array.from(itemsPoisonedIteratorValue) throws a Test262Error exception');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/from/iter-map-fn-args.js b/js/src/tests/test262/built-ins/Array/from/iter-map-fn-args.js
new file mode 100644
index 0000000000..bab7631d3f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/from/iter-map-fn-args.js
@@ -0,0 +1,73 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.from
+description: >
+    Arguments of mapping function (traversed via iterator)
+info: |
+    [...]
+    2. If mapfn is undefined, let mapping be false.
+    3. else
+       a. If IsCallable(mapfn) is false, throw a TypeError exception.
+       b. If thisArg was supplied, let T be thisArg; else let T be undefined.
+       c. Let mapping be true
+    [...]
+    6. If usingIterator is not undefined, then
+       [...]
+       g. Repeat
+          [...]
+          vii. If mapping is true, then
+               1. Let mappedValue be Call(mapfn, T, «nextValue, k»).
+               2. If mappedValue is an abrupt completion, return
+                  IteratorClose(iterator, mappedValue).
+               3. Let mappedValue be mappedValue.[[value]].
+features: [Symbol.iterator]
+---*/
+
+var args = [];
+var firstResult = {
+  done: false,
+  value: {}
+};
+var secondResult = {
+  done: false,
+  value: {}
+};
+var mapFn = function(value, idx) {
+  args.push(arguments);
+};
+var items = {};
+var nextResult = firstResult;
+var nextNextResult = secondResult;
+
+items[Symbol.iterator] = function() {
+  return {
+    next: function() {
+      var result = nextResult;
+      nextResult = nextNextResult;
+      nextNextResult = {
+        done: true
+      };
+
+      return result;
+    }
+  };
+};
+
+Array.from(items, mapFn);
+
+assert.sameValue(args.length, 2, 'The value of args.length is expected to be 2');
+
+assert.sameValue(args[0].length, 2, 'The value of args[0].length is expected to be 2');
+assert.sameValue(
+  args[0][0], firstResult.value, 'The value of args[0][0] is expected to equal the value of firstResult.value'
+);
+assert.sameValue(args[0][1], 0, 'The value of args[0][1] is expected to be 0');
+
+assert.sameValue(args[1].length, 2, 'The value of args[1].length is expected to be 2');
+assert.sameValue(
+  args[1][0], secondResult.value, 'The value of args[1][0] is expected to equal the value of secondResult.value'
+);
+assert.sameValue(args[1][1], 1, 'The value of args[1][1] is expected to be 1');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/from/iter-map-fn-err.js b/js/src/tests/test262/built-ins/Array/from/iter-map-fn-err.js
new file mode 100644
index 0000000000..beeca8e4eb
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/from/iter-map-fn-err.js
@@ -0,0 +1,43 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.from
+description: Error invoking map function (traversed via iterator)
+info: |
+    [...]
+    6. If usingIterator is not undefined, then
+       [...]
+       g. Repeat
+          [...]
+          vii. If mapping is true, then
+               1. Let mappedValue be Call(mapfn, T, «nextValue, k»).
+               2. If mappedValue is an abrupt completion, return
+                  IteratorClose(iterator, mappedValue).
+features: [Symbol.iterator]
+---*/
+
+var closeCount = 0;
+var mapFn = function() {
+  throw new Test262Error();
+};
+var items = {};
+items[Symbol.iterator] = function() {
+  return {
+    return: function() {
+      closeCount += 1;
+    },
+    next: function() {
+      return {
+        done: false
+      };
+    }
+  };
+};
+
+assert.throws(Test262Error, function() {
+  Array.from(items, mapFn);
+}, 'Array.from(items, mapFn) throws a Test262Error exception');
+
+assert.sameValue(closeCount, 1, 'The value of closeCount is expected to be 1');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/from/iter-map-fn-return.js b/js/src/tests/test262/built-ins/Array/from/iter-map-fn-return.js
new file mode 100644
index 0000000000..075bc6cd30
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/from/iter-map-fn-return.js
@@ -0,0 +1,72 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.from
+description: Value returned by mapping function (traversed via iterator)
+info: |
+    [...]
+    2. If mapfn is undefined, let mapping be false.
+    3. else
+       a. If IsCallable(mapfn) is false, throw a TypeError exception.
+       b. If thisArg was supplied, let T be thisArg; else let T be undefined.
+       c. Let mapping be true
+    [...]
+    6. If usingIterator is not undefined, then
+       [...]
+       g. Repeat
+          [...]
+          vii. If mapping is true, then
+               1. Let mappedValue be Call(mapfn, T, «nextValue, k»).
+               2. If mappedValue is an abrupt completion, return
+                  IteratorClose(iterator, mappedValue).
+               3. Let mappedValue be mappedValue.[[value]].
+features: [Symbol.iterator]
+---*/
+
+var thisVals = [];
+var nextResult = {
+  done: false,
+  value: {}
+};
+var nextNextResult = {
+  done: false,
+  value: {}
+};
+var firstReturnVal = {};
+var secondReturnVal = {};
+var mapFn = function(value, idx) {
+  var returnVal = nextReturnVal;
+  nextReturnVal = nextNextReturnVal;
+  nextNextReturnVal = null;
+  return returnVal;
+};
+var nextReturnVal = firstReturnVal;
+var nextNextReturnVal = secondReturnVal;
+var items = {};
+var result;
+
+items[Symbol.iterator] = function() {
+  return {
+    next: function() {
+      var result = nextResult;
+      nextResult = nextNextResult;
+      nextNextResult = {
+        done: true
+      };
+
+      return result;
+    }
+  };
+};
+
+result = Array.from(items, mapFn);
+
+assert.sameValue(result.length, 2, 'The value of result.length is expected to be 2');
+assert.sameValue(result[0], firstReturnVal, 'The value of result[0] is expected to equal the value of firstReturnVal');
+assert.sameValue(
+  result[1],
+  secondReturnVal,
+  'The value of result[1] is expected to equal the value of secondReturnVal'
+);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/from/iter-map-fn-this-arg.js b/js/src/tests/test262/built-ins/Array/from/iter-map-fn-this-arg.js
new file mode 100644
index 0000000000..16e9381caf
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/from/iter-map-fn-this-arg.js
@@ -0,0 +1,59 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.from
+description: >
+    `this` value of mapping function with custom `this` argument (traversed via iterator)
+info: |
+    [...]
+    2. If mapfn is undefined, let mapping be false.
+    3. else
+       a. If IsCallable(mapfn) is false, throw a TypeError exception.
+       b. If thisArg was supplied, let T be thisArg; else let T be undefined.
+       c. Let mapping be true
+    [...]
+    6. If usingIterator is not undefined, then
+       [...]
+       g. Repeat
+          [...]
+          vii. If mapping is true, then
+               1. Let mappedValue be Call(mapfn, T, «nextValue, k»).
+features: [Symbol.iterator]
+---*/
+
+var thisVals = [];
+var nextResult = {
+  done: false,
+  value: {}
+};
+var nextNextResult = {
+  done: false,
+  value: {}
+};
+var mapFn = function() {
+  thisVals.push(this);
+};
+var items = {};
+var thisVal = {};
+
+items[Symbol.iterator] = function() {
+  return {
+    next: function() {
+      var result = nextResult;
+      nextResult = nextNextResult;
+      nextNextResult = {
+        done: true
+      };
+
+      return result;
+    }
+  };
+};
+
+Array.from(items, mapFn, thisVal);
+
+assert.sameValue(thisVals.length, 2, 'The value of thisVals.length is expected to be 2');
+assert.sameValue(thisVals[0], thisVal, 'The value of thisVals[0] is expected to equal the value of thisVal');
+assert.sameValue(thisVals[1], thisVal, 'The value of thisVals[1] is expected to equal the value of thisVal');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/from/iter-map-fn-this-non-strict.js b/js/src/tests/test262/built-ins/Array/from/iter-map-fn-this-non-strict.js
new file mode 100644
index 0000000000..bd54bcfa19
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/from/iter-map-fn-this-non-strict.js
@@ -0,0 +1,62 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.from
+description: >
+    `this` value of mapping function in non-strict mode (traversed via iterator)
+info: |
+    [...]
+    2. If mapfn is undefined, let mapping be false.
+    3. else
+       a. If IsCallable(mapfn) is false, throw a TypeError exception.
+       b. If thisArg was supplied, let T be thisArg; else let T be undefined.
+       c. Let mapping be true
+    [...]
+    6. If usingIterator is not undefined, then
+       [...]
+       g. Repeat
+          [...]
+          vii. If mapping is true, then
+               1. Let mappedValue be Call(mapfn, T, «nextValue, k»).
+features: [Symbol.iterator]
+flags: [noStrict]
+---*/
+
+var thisVals = [];
+var nextResult = {
+  done: false,
+  value: {}
+};
+var nextNextResult = {
+  done: false,
+  value: {}
+};
+var mapFn = function() {
+  thisVals.push(this);
+};
+var items = {};
+var global = function() {
+  return this;
+}();
+
+items[Symbol.iterator] = function() {
+  return {
+    next: function() {
+      var result = nextResult;
+      nextResult = nextNextResult;
+      nextNextResult = {
+        done: true
+      };
+
+      return result;
+    }
+  };
+};
+
+Array.from(items, mapFn);
+
+assert.sameValue(thisVals.length, 2, 'The value of thisVals.length is expected to be 2');
+assert.sameValue(thisVals[0], global, 'The value of thisVals[0] is expected to equal the value of global');
+assert.sameValue(thisVals[1], global, 'The value of thisVals[1] is expected to equal the value of global');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/from/iter-map-fn-this-strict-strict.js b/js/src/tests/test262/built-ins/Array/from/iter-map-fn-this-strict-strict.js
new file mode 100644
index 0000000000..0404185f10
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/from/iter-map-fn-this-strict-strict.js
@@ -0,0 +1,60 @@
+'use strict';
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.from
+description: >
+    `this` value of mapping function in strict mode (traversed via iterator)
+info: |
+    [...]
+    2. If mapfn is undefined, let mapping be false.
+    3. else
+       a. If IsCallable(mapfn) is false, throw a TypeError exception.
+       b. If thisArg was supplied, let T be thisArg; else let T be undefined.
+       c. Let mapping be true
+    [...]
+    6. If usingIterator is not undefined, then
+       [...]
+       g. Repeat
+          [...]
+          vii. If mapping is true, then
+               1. Let mappedValue be Call(mapfn, T, «nextValue, k»).
+features: [Symbol.iterator]
+flags: [onlyStrict]
+---*/
+
+var thisVals = [];
+var nextResult = {
+  done: false,
+  value: {}
+};
+var nextNextResult = {
+  done: false,
+  value: {}
+};
+var mapFn = function() {
+  thisVals.push(this);
+};
+var items = {};
+
+items[Symbol.iterator] = function() {
+  return {
+    next: function() {
+      var result = nextResult;
+      nextResult = nextNextResult;
+      nextNextResult = {
+        done: true
+      };
+
+      return result;
+    }
+  };
+};
+
+Array.from(items, mapFn);
+
+assert.sameValue(thisVals.length, 2, 'The value of thisVals.length is expected to be 2');
+assert.sameValue(thisVals[0], undefined, 'The value of thisVals[0] is expected to equal undefined');
+assert.sameValue(thisVals[1], undefined, 'The value of thisVals[1] is expected to equal undefined');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/from/iter-set-elem-prop-err.js b/js/src/tests/test262/built-ins/Array/from/iter-set-elem-prop-err.js
new file mode 100644
index 0000000000..96ce7a6f71
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/from/iter-set-elem-prop-err.js
@@ -0,0 +1,54 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.from
+description: Error setting property on result value (traversed via iterator)
+info: |
+    [...]
+    6. If usingIterator is not undefined, then
+       [...]
+       g. Repeat
+          [...]
+          ix. Let defineStatus be CreateDataPropertyOrThrow(A, Pk,
+              mappedValue).
+          x. If defineStatus is an abrupt completion, return
+             IteratorClose(iterator, defineStatus).
+features: [Symbol.iterator]
+---*/
+
+var constructorSetsIndex0ConfigurableFalse = function() {
+  Object.defineProperty(this, '0', {
+    writable: true,
+    configurable: false
+  });
+};
+var closeCount = 0;
+var items = {};
+var nextResult = {
+  done: false
+};
+
+items[Symbol.iterator] = function() {
+  return {
+    return: function() {
+      closeCount += 1;
+    },
+    next: function() {
+      var result = nextResult;
+
+      nextResult = {
+        done: true
+      };
+
+      return result;
+    }
+  };
+};
+
+assert.throws(TypeError, function() {
+  Array.from.call(constructorSetsIndex0ConfigurableFalse, items);
+}, 'Array.from.call(constructorSetsIndex0ConfigurableFalse, items) throws a TypeError exception');
+
+assert.sameValue(closeCount, 1, 'The value of closeCount is expected to be 1');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/from/iter-set-elem-prop-non-writable.js b/js/src/tests/test262/built-ins/Array/from/iter-set-elem-prop-non-writable.js
new file mode 100644
index 0000000000..ff34d68d11
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/from/iter-set-elem-prop-non-writable.js
@@ -0,0 +1,45 @@
+// Copyright (C) 2020 Alexey Shvayka. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.from
+description: >
+  Non-writable properties are overwritten by CreateDataProperty.
+  (result object's "0" is non-writable, items is iterable)
+info: |
+  Array.from ( items [ , mapfn [ , thisArg ] ] )
+
+  [...]
+  5. If usingIterator is not undefined, then
+    [...]
+    e. Repeat,
+      [...]
+      viii. Let defineStatus be CreateDataPropertyOrThrow(A, Pk, mappedValue).
+    [...]
+features: [generators]
+includes: [propertyHelper.js]
+---*/
+
+var items = function* () {
+  yield 2;
+};
+
+var A = function(_length) {
+  Object.defineProperty(this, "0", {
+    value: 1,
+    writable: false,
+    enumerable: false,
+    configurable: true,
+  });
+};
+
+var res = Array.from.call(A, items());
+
+verifyProperty(res, "0", {
+  value: 2,
+  writable: true,
+  enumerable: true,
+  configurable: true,
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/from/iter-set-elem-prop.js b/js/src/tests/test262/built-ins/Array/from/iter-set-elem-prop.js
new file mode 100644
index 0000000000..20f0573f98
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/from/iter-set-elem-prop.js
@@ -0,0 +1,60 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.from
+description: Setting property on result value (traversed via iterator)
+info: |
+    [...]
+    6. If usingIterator is not undefined, then
+       [...]
+       g. Repeat
+          [...]
+          ix. Let defineStatus be CreateDataPropertyOrThrow(A, Pk,
+              mappedValue).
+features: [Symbol.iterator]
+---*/
+
+var items = {};
+var firstIterResult = {
+  done: false,
+  value: {}
+};
+var secondIterResult = {
+  done: false,
+  value: {}
+};
+var thirdIterResult = {
+  done: true,
+  value: {}
+};
+var nextIterResult = firstIterResult;
+var nextNextIterResult = secondIterResult;
+var result;
+
+items[Symbol.iterator] = function() {
+  return {
+    next: function() {
+      var result = nextIterResult;
+
+      nextIterResult = nextNextIterResult;
+      nextNextIterResult = thirdIterResult;
+
+      return result;
+    }
+  };
+};
+
+result = Array.from(items);
+
+assert.sameValue(
+  result[0],
+  firstIterResult.value,
+  'The value of result[0] is expected to equal the value of firstIterResult.value'
+);
+assert.sameValue(
+  result[1],
+  secondIterResult.value,
+  'The value of result[1] is expected to equal the value of secondIterResult.value'
+);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/from/iter-set-length-err.js b/js/src/tests/test262/built-ins/Array/from/iter-set-length-err.js
new file mode 100644
index 0000000000..215ca22e1e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/from/iter-set-length-err.js
@@ -0,0 +1,39 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.from
+description: Error setting length of object (traversed via iterator)
+info: |
+    [...]
+    6. If usingIterator is not undefined, then
+       [...]
+       g. Repeat
+          [...]
+          iv. If next is false, then
+              1. Let setStatus be Set(A, "length", k, true).
+              2. ReturnIfAbrupt(setStatus).
+features: [Symbol.iterator]
+---*/
+
+var poisonedPrototypeLength = function() {};
+var items = {};
+Object.defineProperty(poisonedPrototypeLength.prototype, 'length', {
+  set: function(_) {
+    throw new Test262Error();
+  }
+});
+items[Symbol.iterator] = function() {
+  return {
+    next: function() {
+      return {
+        done: true
+      };
+    }
+  };
+};
+
+assert.throws(Test262Error, function() {
+  Array.from.call(poisonedPrototypeLength, items);
+}, 'Array.from.call(poisonedPrototypeLength, items) throws a Test262Error exception');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/from/iter-set-length.js b/js/src/tests/test262/built-ins/Array/from/iter-set-length.js
new file mode 100644
index 0000000000..341e0b4a14
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/from/iter-set-length.js
@@ -0,0 +1,48 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.from
+description: Setting length of object (traversed via iterator)
+info: |
+    [...]
+    6. If usingIterator is not undefined, then
+       [...]
+       g. Repeat
+          [...]
+          iv. If next is false, then
+              1. Let setStatus be Set(A, "length", k, true).
+              2. ReturnIfAbrupt(setStatus).
+              3. Return A.
+features: [Symbol.iterator]
+---*/
+
+var items = {};
+var result, nextIterResult, lastIterResult;
+items[Symbol.iterator] = function() {
+  return {
+    next: function() {
+      var result = nextIterResult;
+      nextIterResult = lastIterResult;
+      return result;
+    }
+  };
+};
+
+nextIterResult = lastIterResult = {
+  done: true
+};
+result = Array.from(items);
+
+assert.sameValue(result.length, 0, 'The value of result.length is expected to be 0');
+
+nextIterResult = {
+  done: false
+};
+lastIterResult = {
+  done: true
+};
+result = Array.from(items);
+
+assert.sameValue(result.length, 1, 'The value of result.length is expected to be 1');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/from/mapfn-is-not-callable-typeerror.js b/js/src/tests/test262/built-ins/Array/from/mapfn-is-not-callable-typeerror.js
new file mode 100644
index 0000000000..663355bf7e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/from/mapfn-is-not-callable-typeerror.js
@@ -0,0 +1,36 @@
+// Copyright 2015 Leonardo Balter. All rights reserved.
+// This code is governed by the license found in the LICENSE file.
+/*---
+esid: sec-array.from
+description: Throws a TypeError if mapFn is not callable
+info: |
+  22.1.2.1 Array.from ( items [ , mapfn [ , thisArg ] ] )
+
+  ...
+  2. If mapfn is undefined, let mapping be false.
+  3. else
+    a. If IsCallable(mapfn) is false, throw a TypeError exception.
+    ...
+---*/
+
+assert.throws(TypeError, function() {
+  Array.from([], null);
+}, 'Array.from([], null) throws a TypeError exception');
+
+assert.throws(TypeError, function() {
+  Array.from([], {});
+}, 'Array.from([], {}) throws a TypeError exception');
+
+assert.throws(TypeError, function() {
+  Array.from([], 'string');
+}, 'Array.from([], "string") throws a TypeError exception');
+
+assert.throws(TypeError, function() {
+  Array.from([], true);
+}, 'Array.from([], true) throws a TypeError exception');
+
+assert.throws(TypeError, function() {
+  Array.from([], 42);
+}, 'Array.from([], 42) throws a TypeError exception');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/from/mapfn-is-symbol-throws.js b/js/src/tests/test262/built-ins/Array/from/mapfn-is-symbol-throws.js
new file mode 100644
index 0000000000..8583e376c6
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/from/mapfn-is-symbol-throws.js
@@ -0,0 +1,22 @@
+// Copyright 2015 Leonardo Balter. All rights reserved.
+// This code is governed by the license found in the LICENSE file.
+/*---
+esid: sec-array.from
+description: Throws a TypeError if mapFn is not callable (Symbol)
+info: |
+  22.1.2.1 Array.from ( items [ , mapfn [ , thisArg ] ] )
+
+  ...
+  2. If mapfn is undefined, let mapping be false.
+  3. else
+    a. If IsCallable(mapfn) is false, throw a TypeError exception.
+    ...
+features:
+  - Symbol
+---*/
+
+assert.throws(TypeError, function() {
+  Array.from([], Symbol('1'));
+}, 'Array.from([], Symbol("1")) throws a TypeError exception');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/from/mapfn-throws-exception.js b/js/src/tests/test262/built-ins/Array/from/mapfn-throws-exception.js
new file mode 100644
index 0000000000..3b3148e616
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/from/mapfn-throws-exception.js
@@ -0,0 +1,20 @@
+// Copyright 2015 Microsoft Corporation. All rights reserved.
+// This code is governed by the license found in the LICENSE file.
+
+/*---
+description: mapFn throws an exception
+esid: sec-array.from
+es6id: 22.1.2.1
+---*/
+
+var array = [2, 4, 8, 16, 32, 64, 128];
+
+function mapFnThrows(value, index, obj) {
+  throw new Test262Error();
+}
+
+assert.throws(Test262Error, function() {
+  Array.from(array, mapFnThrows);
+}, 'Array.from(array, mapFnThrows) throws a Test262Error exception');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/from/not-a-constructor.js b/js/src/tests/test262/built-ins/Array/from/not-a-constructor.js
new file mode 100644
index 0000000000..067c4e88ad
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/from/not-a-constructor.js
@@ -0,0 +1,31 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Array.from does not implement [[Construct]], is not new-able
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+
+  sec-evaluatenew
+
+  ...
+  7. If IsConstructor(constructor) is false, throw a TypeError exception.
+  ...
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(isConstructor(Array.from), false, 'isConstructor(Array.from) must return false');
+
+assert.throws(TypeError, () => {
+  new Array.from([]);
+}, 'new Array.from([]) throws a TypeError exception');
+
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/from/proto-from-ctor-realm.js b/js/src/tests/test262/built-ins/Array/from/proto-from-ctor-realm.js
new file mode 100644
index 0000000000..2debc14d02
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/from/proto-from-ctor-realm.js
@@ -0,0 +1,37 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.from
+es6id: 22.1.2.1
+description: Default [[Prototype]] value derived from realm of the constructor
+info: |
+    [...]
+    5. If usingIterator is not undefined, then
+       a. If IsConstructor(C) is true, then
+          i. Let A be ? Construct(C).
+    [...]
+
+    9.1.14 GetPrototypeFromConstructor
+
+    [...]
+    3. Let proto be ? Get(constructor, "prototype").
+    4. If Type(proto) is not Object, then
+       a. Let realm be ? GetFunctionRealm(constructor).
+       b. Let proto be realm's intrinsic object named intrinsicDefaultProto.
+    [...]
+features: [cross-realm]
+---*/
+
+var other = $262.createRealm().global;
+var C = new other.Function();
+C.prototype = null;
+
+var a = Array.from.call(C, []);
+
+assert.sameValue(
+  Object.getPrototypeOf(a),
+  other.Object.prototype,
+  'Object.getPrototypeOf(Array.from.call(C, [])) returns other.Object.prototype'
+);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/from/shell.js b/js/src/tests/test262/built-ins/Array/from/shell.js
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/js/src/tests/test262/built-ins/Array/from/source-array-boundary.js b/js/src/tests/test262/built-ins/Array/from/source-array-boundary.js
new file mode 100644
index 0000000000..69b35e4003
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/from/source-array-boundary.js
@@ -0,0 +1,30 @@
+// Copyright 2015 Microsoft Corporation. All rights reserved.
+// This code is governed by the license found in the LICENSE file.
+
+/*---
+description: Source array with boundary values
+esid: sec-array.from
+es6id: 22.1.2.1
+---*/
+
+var array = [Number.MAX_VALUE, Number.MIN_VALUE, Number.NaN, Number.NEGATIVE_INFINITY, Number.POSITIVE_INFINITY];
+var arrayIndex = -1;
+
+function mapFn(value, index) {
+  this.arrayIndex++;
+  assert.sameValue(value, array[this.arrayIndex], 'The value of value is expected to equal the value of array[this.arrayIndex]');
+  assert.sameValue(index, this.arrayIndex, 'The value of index is expected to equal the value of this.arrayIndex');
+
+  return value;
+}
+
+var a = Array.from(array, mapFn, this);
+
+assert.sameValue(a.length, array.length, 'The value of a.length is expected to equal the value of array.length');
+assert.sameValue(a[0], Number.MAX_VALUE, 'The value of a[0] is expected to equal the value of Number.MAX_VALUE');
+assert.sameValue(a[1], Number.MIN_VALUE, 'The value of a[1] is expected to equal the value of Number.MIN_VALUE');
+assert.sameValue(a[2], Number.NaN, 'The value of a[2] is expected to equal the value of Number.NaN');
+assert.sameValue(a[3], Number.NEGATIVE_INFINITY, 'The value of a[3] is expected to equal the value of Number.NEGATIVE_INFINITY');
+assert.sameValue(a[4], Number.POSITIVE_INFINITY, 'The value of a[4] is expected to equal the value of Number.POSITIVE_INFINITY');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/from/source-object-constructor.js b/js/src/tests/test262/built-ins/Array/from/source-object-constructor.js
new file mode 100644
index 0000000000..7a0d1db9f1
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/from/source-object-constructor.js
@@ -0,0 +1,17 @@
+// Copyright 2015 Microsoft Corporation. All rights reserved.
+// This code is governed by the license found in the LICENSE file.
+
+/*---
+description: >
+    Array.from uses a constructor other than Array.
+esid: sec-array.from
+es6id: 22.1.2.1
+---*/
+
+assert.sameValue(
+  Array.from.call(Object, []).constructor,
+  Object,
+  'The value of Array.from.call(Object, []).constructor is expected to equal the value of Object'
+);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/from/source-object-iterator-1.js b/js/src/tests/test262/built-ins/Array/from/source-object-iterator-1.js
new file mode 100644
index 0000000000..908e5dad16
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/from/source-object-iterator-1.js
@@ -0,0 +1,34 @@
+// Copyright 2015 Microsoft Corporation. All rights reserved.
+// This code is governed by the license found in the LICENSE file.
+
+/*---
+description: Source object has iterator which throws
+esid: sec-array.from
+es6id: 22.1.2.1
+features: [Symbol.iterator]
+---*/
+
+var array = [2, 4, 8, 16, 32, 64, 128];
+var obj = {
+  [Symbol.iterator]() {
+    return {
+      index: 0,
+      next() {
+        throw new Test262Error();
+      },
+      isDone: false,
+      get val() {
+        this.index++;
+        if (this.index > 7) {
+          this.isDone = true;
+        }
+        return 1 << this.index;
+      }
+    };
+  }
+};
+assert.throws(Test262Error, function() {
+  Array.from(obj);
+}, 'Array.from(obj) throws a Test262Error exception');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/from/source-object-iterator-2.js b/js/src/tests/test262/built-ins/Array/from/source-object-iterator-2.js
new file mode 100644
index 0000000000..3f56c3ae78
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/from/source-object-iterator-2.js
@@ -0,0 +1,39 @@
+// Copyright 2015 Microsoft Corporation. All rights reserved.
+// This code is governed by the license found in the LICENSE file.
+
+/*---
+description: Source object has iterator
+esid: sec-array.from
+es6id: 22.1.2.1
+features: [Symbol.iterator]
+---*/
+
+var array = [2, 4, 8, 16, 32, 64, 128];
+var obj = {
+  [Symbol.iterator]() {
+    return {
+      index: 0,
+      next() {
+        return {
+          value: this.val,
+          done: this.isDone
+        };
+      },
+      isDone: false,
+      get val() {
+        this.index++;
+        if (this.index > 7) {
+          this.isDone = true;
+        }
+        return 1 << this.index;
+      }
+    };
+  }
+};
+var a = Array.from.call(Object, obj);
+assert.sameValue(typeof a, typeof {}, 'The value of `typeof a` is expected to be typeof {}');
+for (var j = 0; j < a.length; j++) {
+  assert.sameValue(a[j], array[j], 'The value of a[j] is expected to equal the value of array[j]');
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/from/source-object-length-set-elem-prop-err.js b/js/src/tests/test262/built-ins/Array/from/source-object-length-set-elem-prop-err.js
new file mode 100644
index 0000000000..119e5898b9
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/from/source-object-length-set-elem-prop-err.js
@@ -0,0 +1,54 @@
+// Copyright (C) 2020 Alexey Shvayka. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.from
+description: >
+  TypeError is thrown if CreateDataProperty fails.
+  (items is not iterable)
+info: |
+  Array.from ( items [ , mapfn [ , thisArg ] ] )
+
+  [...]
+  4. Let usingIterator be ? GetMethod(items, @@iterator).
+  5. If usingIterator is not undefined, then
+    [...]
+  6. NOTE: items is not an Iterable so assume it is an array-like object.
+  [...]
+  12. Repeat, while k < len
+    [...]
+    e. Perform ? CreateDataPropertyOrThrow(A, Pk, mappedValue).
+  [...]
+
+  CreateDataPropertyOrThrow ( O, P, V )
+
+  [...]
+  3. Let success be ? CreateDataProperty(O, P, V).
+  4. If success is false, throw a TypeError exception.
+---*/
+
+var items = {
+  length: 1,
+};
+
+var A1 = function(_length) {
+  this.length = 0;
+  Object.preventExtensions(this);
+};
+
+assert.throws(TypeError, function() {
+  Array.from.call(A1, items);
+}, 'Array.from.call(A1, items) throws a TypeError exception');
+
+var A2 = function(_length) {
+  Object.defineProperty(this, "0", {
+    writable: true,
+    configurable: false,
+  });
+};
+
+assert.throws(TypeError, function() {
+  Array.from.call(A2, items);
+}, 'Array.from.call(A2, items) throws a TypeError exception');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/from/source-object-length-set-elem-prop-non-writable.js b/js/src/tests/test262/built-ins/Array/from/source-object-length-set-elem-prop-non-writable.js
new file mode 100644
index 0000000000..0ade4a3579
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/from/source-object-length-set-elem-prop-non-writable.js
@@ -0,0 +1,48 @@
+// Copyright (C) 2020 Alexey Shvayka. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.from
+description: >
+  Non-writable properties are overwritten by CreateDataProperty.
+  (result object's "0" is non-writable, items is not iterable)
+info: |
+  Array.from ( items [ , mapfn [ , thisArg ] ] )
+
+  [...]
+  4. Let usingIterator be ? GetMethod(items, @@iterator).
+  5. If usingIterator is not undefined, then
+    [...]
+  6. NOTE: items is not an Iterable so assume it is an array-like object.
+  [...]
+  12. Repeat, while k < len
+    [...]
+    e. Perform ? CreateDataPropertyOrThrow(A, Pk, mappedValue).
+  [...]
+includes: [propertyHelper.js]
+---*/
+
+var items = {
+  "0": 2,
+  length: 1,
+};
+
+var A = function(_length) {
+  Object.defineProperty(this, "0", {
+    value: 1,
+    writable: false,
+    enumerable: false,
+    configurable: true,
+  });
+};
+
+var res = Array.from.call(A, items);
+
+verifyProperty(res, "0", {
+  value: 2,
+  writable: true,
+  enumerable: true,
+  configurable: true,
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/from/source-object-length.js b/js/src/tests/test262/built-ins/Array/from/source-object-length.js
new file mode 100644
index 0000000000..c9262c824b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/from/source-object-length.js
@@ -0,0 +1,27 @@
+// Copyright 2015 Microsoft Corporation. All rights reserved.
+// This code is governed by the license found in the LICENSE file.
+
+/*---
+description: >
+    Source is an object with length property and one item is deleted
+    from the source
+esid: sec-array.from
+es6id: 22.1.2.1
+---*/
+
+var array = [2, 4, 0, 16];
+var expectedArray = [2, 4, , 16];
+var obj = {
+  length: 4,
+  0: 2,
+  1: 4,
+  2: 0,
+  3: 16
+};
+delete obj[2];
+var a = Array.from(obj);
+for (var j = 0; j < expectedArray.length; j++) {
+  assert.sameValue(a[j], expectedArray[j], 'The value of a[j] is expected to equal the value of expectedArray[j]');
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/from/source-object-missing.js b/js/src/tests/test262/built-ins/Array/from/source-object-missing.js
new file mode 100644
index 0000000000..0acd29a694
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/from/source-object-missing.js
@@ -0,0 +1,24 @@
+// Copyright 2015 Microsoft Corporation. All rights reserved.
+// This code is governed by the license found in the LICENSE file.
+
+/*---
+description: Source is an object with missing values
+esid: sec-array.from
+es6id: 22.1.2.1
+---*/
+
+var array = [2, 4, , 16];
+var obj = {
+  length: 4,
+  0: 2,
+  1: 4,
+  3: 16
+};
+
+var a = Array.from.call(Object, obj);
+assert.sameValue(typeof a, "object", 'The value of `typeof a` is expected to be "object"');
+for (var j = 0; j < a.length; j++) {
+  assert.sameValue(a[j], array[j], 'The value of a[j] is expected to equal the value of array[j]');
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/from/source-object-without.js b/js/src/tests/test262/built-ins/Array/from/source-object-without.js
new file mode 100644
index 0000000000..d3f131aead
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/from/source-object-without.js
@@ -0,0 +1,20 @@
+// Copyright 2015 Microsoft Corporation. All rights reserved.
+// This code is governed by the license found in the LICENSE file.
+
+/*---
+description: Source is an object without length property
+esid: sec-array.from
+es6id: 22.1.2.1
+---*/
+
+var obj = {
+  0: 2,
+  1: 4,
+  2: 8,
+  3: 16
+}
+
+var a = Array.from(obj);
+assert.sameValue(a.length, 0, 'The value of a.length is expected to be 0');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/from/this-null.js b/js/src/tests/test262/built-ins/Array/from/this-null.js
new file mode 100644
index 0000000000..a46feccd51
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/from/this-null.js
@@ -0,0 +1,14 @@
+// Copyright 2015 Leonardo Balter. All rights reserved.
+// This code is governed by the license found in the LICENSE file.
+/*---
+esid: sec-array.from
+es6id: 22.1.2.1
+description: Does not throw if this is null
+---*/
+
+var result = Array.from.call(null, []);
+
+assert(result instanceof Array, 'The result of evaluating (result instanceof Array) is expected to be true');
+assert.sameValue(result.length, 0, 'The value of result.length is expected to be 0');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/fromAsync/async-iterable-async-mapped-awaits-once.js b/js/src/tests/test262/built-ins/Array/fromAsync/async-iterable-async-mapped-awaits-once.js
new file mode 100644
index 0000000000..19fea4fdfa
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/fromAsync/async-iterable-async-mapped-awaits-once.js
@@ -0,0 +1,31 @@
+// |reftest| async
+// Copyright (C) 2023 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.fromasync
+description: >
+  Async-iterable awaits each input once with mapping callback
+includes: [asyncHelpers.js]
+flags: [async]
+features: [Array.fromAsync]
+---*/
+
+asyncTest(async function () {
+  async function* generateInput () {
+    yield* [ 0, 1, 2 ];
+  }
+  const input = generateInput();
+  let awaitCounter = 0;
+  await Array.fromAsync(input, v => {
+    return {
+      // This “then” method should occur three times:
+      // one for each value from the input.
+      then (resolve, reject) {
+        awaitCounter ++;
+        resolve(v);
+      },
+    };
+  });
+  assert.sameValue(awaitCounter, 3);
+});
diff --git a/js/src/tests/test262/built-ins/Array/fromAsync/async-iterable-input-does-not-await-input.js b/js/src/tests/test262/built-ins/Array/fromAsync/async-iterable-input-does-not-await-input.js
new file mode 100644
index 0000000000..7512a69e3f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/fromAsync/async-iterable-input-does-not-await-input.js
@@ -0,0 +1,39 @@
+// |reftest| async
+// Copyright (C) 2023 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.fromasync
+description: Async-iterable input does not await input values.
+includes: [compareArray.js, asyncHelpers.js]
+flags: [async]
+features: [Array.fromAsync]
+---*/
+
+asyncTest(async function () {
+  const prom = Promise.resolve({});
+  const expected = [ prom ];
+
+  function createInput () {
+    return {
+      // The following async iterator will yield one value
+      // (the promise named “prom”).
+      [Symbol.asyncIterator]() {
+        let i = 0;
+        return {
+          async next() {
+            if (i > 0) {
+              return { done: true };
+            }
+            i++;
+            return { value: prom, done: false }
+          },
+        };
+      },
+    };
+  }
+
+  const input = createInput();
+  const output = await Array.fromAsync(input);
+  assert.compareArray(output, expected);
+});
diff --git a/js/src/tests/test262/built-ins/Array/fromAsync/async-iterable-input-iteration-err.js b/js/src/tests/test262/built-ins/Array/fromAsync/async-iterable-input-iteration-err.js
new file mode 100644
index 0000000000..c4c9baec1e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/fromAsync/async-iterable-input-iteration-err.js
@@ -0,0 +1,21 @@
+// |reftest| async
+// Copyright (C) 2023 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.fromasync
+description: >
+  Array.fromAsync promise rejects if iteration of input fails.
+flags: [async]
+features: [Array.fromAsync]
+includes: [asyncHelpers.js]
+---*/
+
+asyncTest(async function () {
+  async function *generateInput () {
+    throw new Test262Error('This error should be propagated.');
+  }
+  const input = generateInput();
+  const outputPromise = Array.fromAsync(input);
+  await assert.throwsAsync(Test262Error, () => outputPromise);
+});
diff --git a/js/src/tests/test262/built-ins/Array/fromAsync/async-iterable-input.js b/js/src/tests/test262/built-ins/Array/fromAsync/async-iterable-input.js
new file mode 100644
index 0000000000..edf1c21de9
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/fromAsync/async-iterable-input.js
@@ -0,0 +1,24 @@
+// |reftest| async
+// Copyright (C) 2023 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.fromasync
+description: >
+  Async-iterable input is transferred to the output array.
+includes: [compareArray.js, asyncHelpers.js]
+flags: [async]
+features: [Array.fromAsync]
+---*/
+
+asyncTest(async function () {
+  const expected = [ 0, 1, 2 ];
+
+  async function* generateInput () {
+    yield* expected;
+  }
+
+  const input = generateInput();
+  const output = await Array.fromAsync(input);
+  assert.compareArray(output, expected);
+});
diff --git a/js/src/tests/test262/built-ins/Array/fromAsync/asyncitems-array-add-to-empty.js b/js/src/tests/test262/built-ins/Array/fromAsync/asyncitems-array-add-to-empty.js
new file mode 100644
index 0000000000..ac4687646e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/fromAsync/asyncitems-array-add-to-empty.js
@@ -0,0 +1,45 @@
+// |reftest| async
+// Copyright (C) 2022 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.fromasync
+description: >
+  Array.fromAsync respects array mutation
+info: |
+  Array.fromAsync
+    3.j.ii.3. Let next be ? Await(IteratorStep(iteratorRecord)).
+
+  IteratorStep
+    1. Let result be ? IteratorNext(iteratorRecord).
+
+  IteratorNext
+    1.a. Let result be ? Call(iteratorRecord.[[NextMethod]], iteratorRecord.[[Iterator]]).
+
+  %AsyncFromSyncIteratorPrototype%.next
+    6.a. Let result be Completion(IteratorNext(syncIteratorRecord)).
+
+  IteratorNext
+    1.a. Let result be ? Call(iteratorRecord.[[NextMethod]], iteratorRecord.[[Iterator]]).
+
+  Array.prototype [ @@iterator ] ( )
+  Array.prototype.values ( )
+    2. Return CreateArrayIterator(O, value).
+
+  CreateArrayIterator
+    1.b.iii. If index ≥ len, return NormalCompletion(undefined).
+includes: [asyncHelpers.js, compareArray.js]
+flags: [async]
+features: [Array.fromAsync]
+---*/
+
+asyncTest(async function () {
+  const items = [];
+  const promise = Array.fromAsync(items);
+  // By the time we get here, the first next() call has already happened, and returned
+  // { done: true }. We then return from the loop in Array.fromAsync 3.j.ii. with the empty array,
+  // and the following line no longer affects that.
+  items.push(7);
+  const result = await promise;
+  assert.compareArray(result, []);
+});
diff --git a/js/src/tests/test262/built-ins/Array/fromAsync/asyncitems-array-add-to-singleton.js b/js/src/tests/test262/built-ins/Array/fromAsync/asyncitems-array-add-to-singleton.js
new file mode 100644
index 0000000000..4cc0f501fa
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/fromAsync/asyncitems-array-add-to-singleton.js
@@ -0,0 +1,44 @@
+// |reftest| async
+// Copyright (C) 2022 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.fromasync
+description: >
+  Array.fromAsync respects array mutation
+info: |
+  Array.fromAsync
+    3.j.ii.3. Let next be ? Await(IteratorStep(iteratorRecord)).
+
+  IteratorStep
+    1. Let result be ? IteratorNext(iteratorRecord).
+
+  IteratorNext
+    1.a. Let result be ? Call(iteratorRecord.[[NextMethod]], iteratorRecord.[[Iterator]]).
+
+  %AsyncFromSyncIteratorPrototype%.next
+    6.a. Let result be Completion(IteratorNext(syncIteratorRecord)).
+
+  IteratorNext
+    1.a. Let result be ? Call(iteratorRecord.[[NextMethod]], iteratorRecord.[[Iterator]]).
+
+  Array.prototype [ @@iterator ] ( )
+  Array.prototype.values ( )
+    2. Return CreateArrayIterator(O, value).
+
+  CreateArrayIterator
+    1.b.iii. If index ≥ len, return NormalCompletion(undefined).
+includes: [asyncHelpers.js, compareArray.js]
+flags: [async]
+features: [Array.fromAsync]
+---*/
+
+asyncTest(async function () {
+  const items = [1];
+  const promise = Array.fromAsync(items);
+  // At this point, the first element of `items` has been read, but the iterator will take other
+  // changes into account.
+  items.push(7);
+  const result = await promise;
+  assert.compareArray(result, [1, 7]);
+});
diff --git a/js/src/tests/test262/built-ins/Array/fromAsync/asyncitems-array-add.js b/js/src/tests/test262/built-ins/Array/fromAsync/asyncitems-array-add.js
new file mode 100644
index 0000000000..6cf02babb9
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/fromAsync/asyncitems-array-add.js
@@ -0,0 +1,44 @@
+// |reftest| async
+// Copyright (C) 2022 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.fromasync
+description: >
+  Array.fromAsync respects array mutation
+info: |
+  Array.fromAsync
+    3.j.ii.3. Let next be ? Await(IteratorStep(iteratorRecord)).
+
+  IteratorStep
+    1. Let result be ? IteratorNext(iteratorRecord).
+
+  IteratorNext
+    1.a. Let result be ? Call(iteratorRecord.[[NextMethod]], iteratorRecord.[[Iterator]]).
+
+  %AsyncFromSyncIteratorPrototype%.next
+    6.a. Let result be Completion(IteratorNext(syncIteratorRecord)).
+
+  IteratorNext
+    1.a. Let result be ? Call(iteratorRecord.[[NextMethod]], iteratorRecord.[[Iterator]]).
+
+  Array.prototype [ @@iterator ] ( )
+  Array.prototype.values ( )
+    2. Return CreateArrayIterator(O, value).
+
+  CreateArrayIterator
+    1.b.iii. If index ≥ len, return NormalCompletion(undefined).
+includes: [asyncHelpers.js, compareArray.js]
+flags: [async]
+features: [Array.fromAsync]
+---*/
+
+asyncTest(async function () {
+  const items = [1, 2, 3];
+  const promise = Array.fromAsync(items);
+  // At this point, the first element of `items` has been read, but the iterator will take other
+  // changes into account.
+  items.push(4);
+  const result = await promise;
+  assert.compareArray(result, [1, 2, 3, 4]);
+});
diff --git a/js/src/tests/test262/built-ins/Array/fromAsync/asyncitems-array-mutate.js b/js/src/tests/test262/built-ins/Array/fromAsync/asyncitems-array-mutate.js
new file mode 100644
index 0000000000..2d910d2524
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/fromAsync/asyncitems-array-mutate.js
@@ -0,0 +1,45 @@
+// |reftest| async
+// Copyright (C) 2022 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.fromasync
+description: >
+  Array.fromAsync respects array mutation
+info: |
+  Array.fromAsync
+    3.j.ii.3. Let next be ? Await(IteratorStep(iteratorRecord)).
+
+  IteratorStep
+    1. Let result be ? IteratorNext(iteratorRecord).
+
+  IteratorNext
+    1.a. Let result be ? Call(iteratorRecord.[[NextMethod]], iteratorRecord.[[Iterator]]).
+
+  %AsyncFromSyncIteratorPrototype%.next
+    6.a. Let result be Completion(IteratorNext(syncIteratorRecord)).
+
+  IteratorNext
+    1.a. Let result be ? Call(iteratorRecord.[[NextMethod]], iteratorRecord.[[Iterator]]).
+
+  Array.prototype [ @@iterator ] ( )
+  Array.prototype.values ( )
+    2. Return CreateArrayIterator(O, value).
+
+  CreateArrayIterator
+    1.b.iii. If index ≥ len, return NormalCompletion(undefined).
+includes: [asyncHelpers.js, compareArray.js]
+flags: [async]
+features: [Array.fromAsync]
+---*/
+
+asyncTest(async function () {
+  const items = [1, 2, 3];
+  const promise = Array.fromAsync(items);
+  // At this point, the first element of `items` has been read, but the iterator will take other
+  // changes into account.
+  items[0] = 7;
+  items[1] = 8;
+  const result = await promise;
+  assert.compareArray(result, [1, 8, 3]);
+});
diff --git a/js/src/tests/test262/built-ins/Array/fromAsync/asyncitems-array-remove.js b/js/src/tests/test262/built-ins/Array/fromAsync/asyncitems-array-remove.js
new file mode 100644
index 0000000000..6733b42260
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/fromAsync/asyncitems-array-remove.js
@@ -0,0 +1,44 @@
+// |reftest| async
+// Copyright (C) 2022 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.fromasync
+description: >
+  Array.fromAsync respects array mutation
+info: |
+  Array.fromAsync
+    3.j.ii.3. Let next be ? Await(IteratorStep(iteratorRecord)).
+
+  IteratorStep
+    1. Let result be ? IteratorNext(iteratorRecord).
+
+  IteratorNext
+    1.a. Let result be ? Call(iteratorRecord.[[NextMethod]], iteratorRecord.[[Iterator]]).
+
+  %AsyncFromSyncIteratorPrototype%.next
+    6.a. Let result be Completion(IteratorNext(syncIteratorRecord)).
+
+  IteratorNext
+    1.a. Let result be ? Call(iteratorRecord.[[NextMethod]], iteratorRecord.[[Iterator]]).
+
+  Array.prototype [ @@iterator ] ( )
+  Array.prototype.values ( )
+    2. Return CreateArrayIterator(O, value).
+
+  CreateArrayIterator
+    1.b.iii. If index ≥ len, return NormalCompletion(undefined).
+includes: [asyncHelpers.js, compareArray.js]
+flags: [async]
+features: [Array.fromAsync]
+---*/
+
+asyncTest(async function () {
+  const items = [1, 2, 3];
+  const promise = Array.fromAsync(items);
+  // At this point, the first element of `items` has been read, but the iterator will take other
+  // changes into account.
+  items.pop();
+  const result = await promise;
+  assert.compareArray(result, [1, 2]);
+});
diff --git a/js/src/tests/test262/built-ins/Array/fromAsync/asyncitems-arraybuffer.js b/js/src/tests/test262/built-ins/Array/fromAsync/asyncitems-arraybuffer.js
new file mode 100644
index 0000000000..59df9897b5
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/fromAsync/asyncitems-arraybuffer.js
@@ -0,0 +1,18 @@
+// |reftest| async
+// Copyright (C) 2022 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.fromasync
+description: >
+  Array.fromAsync doesn't special-case ArrayBuffer
+includes: [asyncHelpers.js, compareArray.js]
+flags: [async]
+features: [Array.fromAsync]
+---*/
+
+asyncTest(async function () {
+  const items = new ArrayBuffer(7);
+  const result = await Array.fromAsync(items);
+  assert.compareArray(result, []);
+});
diff --git a/js/src/tests/test262/built-ins/Array/fromAsync/asyncitems-arraylike-holes.js b/js/src/tests/test262/built-ins/Array/fromAsync/asyncitems-arraylike-holes.js
new file mode 100644
index 0000000000..5396f9015b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/fromAsync/asyncitems-arraylike-holes.js
@@ -0,0 +1,25 @@
+// |reftest| async
+// Copyright (C) 2023 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.fromasync
+description: Array-like object with holes treats the holes as undefined
+info: |
+  3.k.vii.2. Let _kValue_ be ? Get(_arrayLike_, _Pk_).
+features: [Array.fromAsync]
+flags: [async]
+includes: [asyncHelpers.js, compareArray.js]
+---*/
+
+asyncTest(async function () {
+  const arrayLike = Object.create(null);
+  arrayLike.length = 5;
+  arrayLike[0] = 0;
+  arrayLike[1] = 1;
+  arrayLike[2] = 2;
+  arrayLike[4] = 4;
+
+  const array = await Array.fromAsync(arrayLike);
+  assert.compareArray(array, [0, 1, 2, undefined, 4], "holes in array-like treated as undefined");
+});
diff --git a/js/src/tests/test262/built-ins/Array/fromAsync/asyncitems-arraylike-length-accessor-throws.js b/js/src/tests/test262/built-ins/Array/fromAsync/asyncitems-arraylike-length-accessor-throws.js
new file mode 100644
index 0000000000..81932ec791
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/fromAsync/asyncitems-arraylike-length-accessor-throws.js
@@ -0,0 +1,26 @@
+// |reftest| async
+// Copyright (C) 2023 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.fromasync
+description: Rejects on array-like object whose length cannot be gotten
+info: |
+  3.k.iii. Let _len_ be ? LengthOfArrayLike(_arrayLike_).
+features: [Array.fromAsync]
+flags: [async]
+includes: [asyncHelpers.js]
+---*/
+
+asyncTest(async function () {
+  await assert.throwsAsync(Test262Error, () => Array.fromAsync({
+    get length() {
+      throw new Test262Error('accessing length property fails');
+    }
+  }), "Promise should be rejected if array-like length getter throws");
+
+  await assert.throwsAsync(TypeError, () => Array.fromAsync({
+    length: 1n,
+    0: 0
+  }), "Promise should be rejected if array-like length can't be converted to a number");
+});
diff --git a/js/src/tests/test262/built-ins/Array/fromAsync/asyncitems-arraylike-promise.js b/js/src/tests/test262/built-ins/Array/fromAsync/asyncitems-arraylike-promise.js
new file mode 100644
index 0000000000..141ce7f08c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/fromAsync/asyncitems-arraylike-promise.js
@@ -0,0 +1,32 @@
+// |reftest| async
+// Copyright (C) 2022 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.fromasync
+description: >
+  Array.fromAsync tries the various properties in order and awaits promises
+includes: [asyncHelpers.js, compareArray.js, temporalHelpers.js]
+flags: [async]
+features: [Array.fromAsync]
+---*/
+
+asyncTest(async function () {
+  const actual = [];
+  const items = TemporalHelpers.propertyBagObserver(actual, {
+    length: 2,
+    0: Promise.resolve(2),
+    1: Promise.resolve(1),
+  }, "items");
+  const result = await Array.fromAsync(items);
+  assert.compareArray(result, [2, 1]);
+  assert.compareArray(actual, [
+    "get items[Symbol.asyncIterator]",
+    "get items[Symbol.iterator]",
+    "get items.length",
+    "get items.length.valueOf",
+    "call items.length.valueOf",
+    "get items[0]",
+    "get items[1]",
+  ]);
+});
diff --git a/js/src/tests/test262/built-ins/Array/fromAsync/asyncitems-arraylike-too-long.js b/js/src/tests/test262/built-ins/Array/fromAsync/asyncitems-arraylike-too-long.js
new file mode 100644
index 0000000000..c634be42ec
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/fromAsync/asyncitems-arraylike-too-long.js
@@ -0,0 +1,32 @@
+// |reftest| async
+// Copyright (C) 2023 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.fromasync
+description: >
+  Promise is rejected if the length of the array-like to copy is out of range
+info: |
+  j. If _iteratorRecord_ is not *undefined*, then
+    ...
+  k. Else,
+    ...
+    iv. If IsConstructor(_C_) is *true*, then
+      ...
+    v. Else,
+      1. Let _A_ be ? ArrayCreate(_len_).
+
+  ArrayCreate, step 1:
+    1. If _length_ > 2³² - 1, throw a *RangeError* exception.
+includes: [asyncHelpers.js]
+flags: [async]
+features: [Array.fromAsync]
+---*/
+
+asyncTest(async function () {
+  const notConstructor = {};
+
+  await assert.throwsAsync(RangeError, () => Array.fromAsync.call(notConstructor, {
+    length: 4294967296  // 2³²
+  }), "Array-like with excessive length");
+});
diff --git a/js/src/tests/test262/built-ins/Array/fromAsync/asyncitems-asynciterator-exists.js b/js/src/tests/test262/built-ins/Array/fromAsync/asyncitems-asynciterator-exists.js
new file mode 100644
index 0000000000..7f4511990d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/fromAsync/asyncitems-asynciterator-exists.js
@@ -0,0 +1,33 @@
+// |reftest| async
+// Copyright (C) 2022 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.fromasync
+description: >
+  Array.fromAsync tries the various properties in order
+includes: [asyncHelpers.js, compareArray.js, temporalHelpers.js]
+flags: [async]
+features: [Array.fromAsync]
+---*/
+
+asyncTest(async function () {
+  async function * asyncGen() {
+    for (let i = 0; i < 4; i++) {
+      yield Promise.resolve(i * 2);
+    }
+  }
+
+  const actual = [];
+  const items = {};
+  TemporalHelpers.observeProperty(actual, items, Symbol.asyncIterator, asyncGen, "items");
+  TemporalHelpers.observeProperty(actual, items, Symbol.iterator, undefined, "items");
+  TemporalHelpers.observeProperty(actual, items, "length", 2, "items");
+  TemporalHelpers.observeProperty(actual, items, 0, 2, "items");
+  TemporalHelpers.observeProperty(actual, items, 1, 1, "items");
+  const result = await Array.fromAsync(items);
+  assert.compareArray(result, [0, 2, 4, 6]);
+  assert.compareArray(actual, [
+    "get items[Symbol.asyncIterator]",
+  ]);
+});
diff --git a/js/src/tests/test262/built-ins/Array/fromAsync/asyncitems-asynciterator-not-callable.js b/js/src/tests/test262/built-ins/Array/fromAsync/asyncitems-asynciterator-not-callable.js
new file mode 100644
index 0000000000..f9406f5a29
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/fromAsync/asyncitems-asynciterator-not-callable.js
@@ -0,0 +1,20 @@
+// |reftest| async
+// Copyright (C) 2022 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.fromasync
+description: >
+  Array.fromAsync rejects if the @@asyncIterator property is not callable
+includes: [asyncHelpers.js]
+flags: [async]
+features: [Array.fromAsync]
+---*/
+
+asyncTest(async function () {
+  for (const v of [true, "", Symbol(), 1, 1n, {}]) {
+    await assert.throwsAsync(TypeError,
+      () => Array.fromAsync({ [Symbol.asyncIterator]: v }),
+      `@@asyncIterator = ${typeof v}`);
+  }
+});
diff --git a/js/src/tests/test262/built-ins/Array/fromAsync/asyncitems-asynciterator-null.js b/js/src/tests/test262/built-ins/Array/fromAsync/asyncitems-asynciterator-null.js
new file mode 100644
index 0000000000..3375e3a1de
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/fromAsync/asyncitems-asynciterator-null.js
@@ -0,0 +1,31 @@
+// |reftest| async
+// Copyright (C) 2022 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.fromasync
+description: >
+  Array.fromAsync tries the various properties in order
+includes: [asyncHelpers.js, compareArray.js, temporalHelpers.js]
+flags: [async]
+features: [Array.fromAsync]
+---*/
+
+asyncTest(async function () {
+  const actual = [];
+  const items = {};
+  TemporalHelpers.observeProperty(actual, items, Symbol.asyncIterator, null, "items");
+  TemporalHelpers.observeProperty(actual, items, Symbol.iterator, undefined, "items");
+  TemporalHelpers.observeProperty(actual, items, "length", 2, "items");
+  TemporalHelpers.observeProperty(actual, items, 0, 2, "items");
+  TemporalHelpers.observeProperty(actual, items, 1, 1, "items");
+  const result = await Array.fromAsync(items);
+  assert.compareArray(result, [2, 1]);
+  assert.compareArray(actual, [
+    "get items[Symbol.asyncIterator]",
+    "get items[Symbol.iterator]",
+    "get items.length",
+    "get items[0]",
+    "get items[1]",
+  ]);
+});
diff --git a/js/src/tests/test262/built-ins/Array/fromAsync/asyncitems-asynciterator-sync.js b/js/src/tests/test262/built-ins/Array/fromAsync/asyncitems-asynciterator-sync.js
new file mode 100644
index 0000000000..90fd4e607b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/fromAsync/asyncitems-asynciterator-sync.js
@@ -0,0 +1,33 @@
+// |reftest| async
+// Copyright (C) 2022 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.fromasync
+description: >
+  Array.fromAsync handles a sync iterator returned from @@asyncIterator
+includes: [asyncHelpers.js, compareArray.js, temporalHelpers.js]
+flags: [async]
+features: [Array.fromAsync]
+---*/
+
+asyncTest(async function () {
+  function * syncGen() {
+    for (let i = 0; i < 4; i++) {
+      yield i * 2;
+    }
+  }
+
+  const actual = [];
+  const items = {};
+  TemporalHelpers.observeProperty(actual, items, Symbol.asyncIterator, syncGen, "items");
+  TemporalHelpers.observeProperty(actual, items, Symbol.iterator, undefined, "items");
+  TemporalHelpers.observeProperty(actual, items, "length", 2, "items");
+  TemporalHelpers.observeProperty(actual, items, 0, 2, "items");
+  TemporalHelpers.observeProperty(actual, items, 1, 1, "items");
+  const result = await Array.fromAsync(items);
+  assert.compareArray(result, [0, 2, 4, 6]);
+  assert.compareArray(actual, [
+    "get items[Symbol.asyncIterator]",
+  ]);
+});
diff --git a/js/src/tests/test262/built-ins/Array/fromAsync/asyncitems-asynciterator-throws.js b/js/src/tests/test262/built-ins/Array/fromAsync/asyncitems-asynciterator-throws.js
new file mode 100644
index 0000000000..22c78f236a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/fromAsync/asyncitems-asynciterator-throws.js
@@ -0,0 +1,17 @@
+// |reftest| async
+// Copyright (C) 2022 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.fromasync
+description: >
+  Array.fromAsync rejects if getting the @@asyncIterator property throws
+includes: [asyncHelpers.js]
+flags: [async]
+features: [Array.fromAsync]
+---*/
+
+asyncTest(async function () {
+  await assert.throwsAsync(Test262Error,
+    () => Array.fromAsync({ get [Symbol.asyncIterator]() { throw new Test262Error() } }));
+});
diff --git a/js/src/tests/test262/built-ins/Array/fromAsync/asyncitems-bigint.js b/js/src/tests/test262/built-ins/Array/fromAsync/asyncitems-bigint.js
new file mode 100644
index 0000000000..307b8da877
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/fromAsync/asyncitems-bigint.js
@@ -0,0 +1,21 @@
+// |reftest| async
+// Copyright (C) 2022 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.fromasync
+description: >
+  Array.fromAsync treats a BigInt as an array-like
+includes: [asyncHelpers.js, compareArray.js]
+flags: [async]
+features: [Array.fromAsync]
+---*/
+
+asyncTest(async function () {
+  BigInt.prototype.length = 2;
+  BigInt.prototype[0] = 1;
+  BigInt.prototype[1] = 2;
+
+  const result = await Array.fromAsync(1n);
+  assert.compareArray(result, [1, 2]);
+});
diff --git a/js/src/tests/test262/built-ins/Array/fromAsync/asyncitems-boolean.js b/js/src/tests/test262/built-ins/Array/fromAsync/asyncitems-boolean.js
new file mode 100644
index 0000000000..62042774f2
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/fromAsync/asyncitems-boolean.js
@@ -0,0 +1,21 @@
+// |reftest| async
+// Copyright (C) 2022 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.fromasync
+description: >
+  Array.fromAsync treats a boolean as an array-like
+includes: [asyncHelpers.js, compareArray.js]
+flags: [async]
+features: [Array.fromAsync]
+---*/
+
+asyncTest(async function () {
+  Boolean.prototype.length = 2;
+  Boolean.prototype[0] = 1;
+  Boolean.prototype[1] = 2;
+
+  const result = await Array.fromAsync(true);
+  assert.compareArray(result, [1, 2]);
+});
diff --git a/js/src/tests/test262/built-ins/Array/fromAsync/asyncitems-function.js b/js/src/tests/test262/built-ins/Array/fromAsync/asyncitems-function.js
new file mode 100644
index 0000000000..80facef636
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/fromAsync/asyncitems-function.js
@@ -0,0 +1,22 @@
+// |reftest| async
+// Copyright (C) 2022 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.fromasync
+description: >
+  Array.fromAsync treats a function as an array-like, reading elements up to fn.length
+includes: [asyncHelpers.js, compareArray.js]
+flags: [async]
+features: [Array.fromAsync]
+---*/
+
+asyncTest(async function () {
+  const fn = function(a, b) {};
+  fn[0] = 1;
+  fn[1] = 2;
+  fn[2] = 3;
+
+  const result = await Array.fromAsync(fn);
+  assert.compareArray(result, [1, 2]);
+});
diff --git a/js/src/tests/test262/built-ins/Array/fromAsync/asyncitems-iterator-exists.js b/js/src/tests/test262/built-ins/Array/fromAsync/asyncitems-iterator-exists.js
new file mode 100644
index 0000000000..b964229285
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/fromAsync/asyncitems-iterator-exists.js
@@ -0,0 +1,34 @@
+// |reftest| async
+// Copyright (C) 2022 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.fromasync
+description: >
+  Array.fromAsync handles a sync iterator returned from @@iterator
+includes: [asyncHelpers.js, compareArray.js, temporalHelpers.js]
+flags: [async]
+features: [Array.fromAsync]
+---*/
+
+asyncTest(async function () {
+  function * syncGen() {
+    for (let i = 0; i < 4; i++) {
+      yield i * 2;
+    }
+  }
+
+  const actual = [];
+  const items = {};
+  TemporalHelpers.observeProperty(actual, items, Symbol.asyncIterator, undefined, "items");
+  TemporalHelpers.observeProperty(actual, items, Symbol.iterator, syncGen, "items");
+  TemporalHelpers.observeProperty(actual, items, "length", 2, "items");
+  TemporalHelpers.observeProperty(actual, items, 0, 2, "items");
+  TemporalHelpers.observeProperty(actual, items, 1, 1, "items");
+  const result = await Array.fromAsync(items);
+  assert.compareArray(result, [0, 2, 4, 6]);
+  assert.compareArray(actual, [
+    "get items[Symbol.asyncIterator]",
+    "get items[Symbol.iterator]",
+  ]);
+});
diff --git a/js/src/tests/test262/built-ins/Array/fromAsync/asyncitems-iterator-not-callable.js b/js/src/tests/test262/built-ins/Array/fromAsync/asyncitems-iterator-not-callable.js
new file mode 100644
index 0000000000..d672bba1dd
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/fromAsync/asyncitems-iterator-not-callable.js
@@ -0,0 +1,20 @@
+// |reftest| async
+// Copyright (C) 2022 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.fromasync
+description: >
+  Array.fromAsync rejects if the @@iterator property is not callable
+includes: [asyncHelpers.js]
+flags: [async]
+features: [Array.fromAsync]
+---*/
+
+asyncTest(async function () {
+  for (const v of [true, "", Symbol(), 1, 1n, {}]) {
+    await assert.throwsAsync(TypeError,
+      () => Array.fromAsync({ [Symbol.iterator]: v }),
+      `@@iterator = ${typeof v}`);
+  }
+});
diff --git a/js/src/tests/test262/built-ins/Array/fromAsync/asyncitems-iterator-null.js b/js/src/tests/test262/built-ins/Array/fromAsync/asyncitems-iterator-null.js
new file mode 100644
index 0000000000..9a8b071d02
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/fromAsync/asyncitems-iterator-null.js
@@ -0,0 +1,31 @@
+// |reftest| async
+// Copyright (C) 2022 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.fromasync
+description: >
+  Array.fromAsync tries the various properties in order
+includes: [asyncHelpers.js, compareArray.js, temporalHelpers.js]
+flags: [async]
+features: [Array.fromAsync]
+---*/
+
+asyncTest(async function () {
+  const actual = [];
+  const items = {};
+  TemporalHelpers.observeProperty(actual, items, Symbol.asyncIterator, undefined, "items");
+  TemporalHelpers.observeProperty(actual, items, Symbol.iterator, null, "items");
+  TemporalHelpers.observeProperty(actual, items, "length", 2, "items");
+  TemporalHelpers.observeProperty(actual, items, 0, 2, "items");
+  TemporalHelpers.observeProperty(actual, items, 1, 1, "items");
+  const result = await Array.fromAsync(items);
+  assert.compareArray(result, [2, 1]);
+  assert.compareArray(actual, [
+    "get items[Symbol.asyncIterator]",
+    "get items[Symbol.iterator]",
+    "get items.length",
+    "get items[0]",
+    "get items[1]",
+  ]);
+});
diff --git a/js/src/tests/test262/built-ins/Array/fromAsync/asyncitems-iterator-promise.js b/js/src/tests/test262/built-ins/Array/fromAsync/asyncitems-iterator-promise.js
new file mode 100644
index 0000000000..b99e5af4cd
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/fromAsync/asyncitems-iterator-promise.js
@@ -0,0 +1,34 @@
+// |reftest| async
+// Copyright (C) 2022 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.fromasync
+description: >
+  Array.fromAsync handles an async iterator returned from @@iterator
+includes: [asyncHelpers.js, compareArray.js, temporalHelpers.js]
+flags: [async]
+features: [Array.fromAsync]
+---*/
+
+asyncTest(async function () {
+  function * asyncGen() {
+    for (let i = 0; i < 4; i++) {
+      yield Promise.resolve(i * 2);
+    }
+  }
+
+  const actual = [];
+  const items = {};
+  TemporalHelpers.observeProperty(actual, items, Symbol.asyncIterator, undefined, "items");
+  TemporalHelpers.observeProperty(actual, items, Symbol.iterator, asyncGen, "items");
+  TemporalHelpers.observeProperty(actual, items, "length", 2, "items");
+  TemporalHelpers.observeProperty(actual, items, 0, 2, "items");
+  TemporalHelpers.observeProperty(actual, items, 1, 1, "items");
+  const result = await Array.fromAsync(items);
+  assert.compareArray(result, [0, 2, 4, 6]);
+  assert.compareArray(actual, [
+    "get items[Symbol.asyncIterator]",
+    "get items[Symbol.iterator]",
+  ]);
+});
diff --git a/js/src/tests/test262/built-ins/Array/fromAsync/asyncitems-iterator-throws.js b/js/src/tests/test262/built-ins/Array/fromAsync/asyncitems-iterator-throws.js
new file mode 100644
index 0000000000..148c3d9dfe
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/fromAsync/asyncitems-iterator-throws.js
@@ -0,0 +1,17 @@
+// |reftest| async
+// Copyright (C) 2022 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.fromasync
+description: >
+  Array.fromAsync rejects if getting the @@iterator property throws
+includes: [asyncHelpers.js]
+flags: [async]
+features: [Array.fromAsync]
+---*/
+
+asyncTest(async function () {
+  await assert.throwsAsync(Test262Error,
+    () => Array.fromAsync({ get [Symbol.iterator]() { throw new Test262Error() } }));
+});
diff --git a/js/src/tests/test262/built-ins/Array/fromAsync/asyncitems-null-undefined.js b/js/src/tests/test262/built-ins/Array/fromAsync/asyncitems-null-undefined.js
new file mode 100644
index 0000000000..e78c18f199
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/fromAsync/asyncitems-null-undefined.js
@@ -0,0 +1,19 @@
+// |reftest| async
+// Copyright (C) 2022 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.fromasync
+description: >
+  Array.fromAsync rejects with a TypeError if the asyncItems argument is null or undefined
+info: |
+  3.c. Let usingAsyncIterator be ? GetMethod(asyncItems, @@asyncIterator).
+includes: [asyncHelpers.js]
+flags: [async]
+features: [Array.fromAsync]
+---*/
+
+asyncTest(async function () {
+  await assert.throwsAsync(TypeError, () => Array.fromAsync(null), "null asyncItems");
+  await assert.throwsAsync(TypeError, () => Array.fromAsync(undefined), "undefined asyncItems");
+});
diff --git a/js/src/tests/test262/built-ins/Array/fromAsync/asyncitems-number.js b/js/src/tests/test262/built-ins/Array/fromAsync/asyncitems-number.js
new file mode 100644
index 0000000000..2dd8ace8e9
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/fromAsync/asyncitems-number.js
@@ -0,0 +1,21 @@
+// |reftest| async
+// Copyright (C) 2022 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.fromasync
+description: >
+  Array.fromAsync treats a Number as an array-like
+includes: [asyncHelpers.js, compareArray.js]
+flags: [async]
+features: [Array.fromAsync]
+---*/
+
+asyncTest(async function () {
+  Number.prototype.length = 2;
+  Number.prototype[0] = 1;
+  Number.prototype[1] = 2;
+
+  const result = await Array.fromAsync(1);
+  assert.compareArray(result, [1, 2]);
+});
diff --git a/js/src/tests/test262/built-ins/Array/fromAsync/asyncitems-object-not-arraylike.js b/js/src/tests/test262/built-ins/Array/fromAsync/asyncitems-object-not-arraylike.js
new file mode 100644
index 0000000000..62f3dd27b4
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/fromAsync/asyncitems-object-not-arraylike.js
@@ -0,0 +1,24 @@
+// |reftest| async
+// Copyright (C) 2023 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.fromasync
+description: >
+  Treats an asyncItems object that isn't an array-like as a 0-length array-like
+info: |
+  3.k.iii. Let _len_ be ? LengthOfArrayLike(_arrayLike_).
+features: [Array.fromAsync]
+flags: [async]
+includes: [asyncHelpers.js, compareArray.js]
+---*/
+
+asyncTest(async function () {
+  const notArrayLike = Object.create(null);
+  notArrayLike[0] = 0;
+  notArrayLike[1] = 1;
+  notArrayLike[2] = 2;
+
+  const array = await Array.fromAsync(notArrayLike);
+  assert.compareArray(array, [], "non-array-like object is treated as 0-length array-like");
+});
diff --git a/js/src/tests/test262/built-ins/Array/fromAsync/asyncitems-operations.js b/js/src/tests/test262/built-ins/Array/fromAsync/asyncitems-operations.js
new file mode 100644
index 0000000000..89b854e164
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/fromAsync/asyncitems-operations.js
@@ -0,0 +1,31 @@
+// |reftest| async
+// Copyright (C) 2022 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.fromasync
+description: >
+  Array.fromAsync tries the various properties in order
+includes: [asyncHelpers.js, compareArray.js, temporalHelpers.js]
+flags: [async]
+features: [Array.fromAsync]
+---*/
+
+asyncTest(async function () {
+  const actual = [];
+  const items = {};
+  TemporalHelpers.observeProperty(actual, items, Symbol.asyncIterator, undefined, "items");
+  TemporalHelpers.observeProperty(actual, items, Symbol.iterator, undefined, "items");
+  TemporalHelpers.observeProperty(actual, items, "length", 2, "items");
+  TemporalHelpers.observeProperty(actual, items, 0, 2, "items");
+  TemporalHelpers.observeProperty(actual, items, 1, 1, "items");
+  const result = await Array.fromAsync(items);
+  assert.compareArray(result, [2, 1]);
+  assert.compareArray(actual, [
+    "get items[Symbol.asyncIterator]",
+    "get items[Symbol.iterator]",
+    "get items.length",
+    "get items[0]",
+    "get items[1]",
+  ]);
+});
diff --git a/js/src/tests/test262/built-ins/Array/fromAsync/asyncitems-string.js b/js/src/tests/test262/built-ins/Array/fromAsync/asyncitems-string.js
new file mode 100644
index 0000000000..d12cfb5453
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/fromAsync/asyncitems-string.js
@@ -0,0 +1,17 @@
+// |reftest| async
+// Copyright (C) 2022 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.fromasync
+description: >
+  Array.fromAsync iterates over a string
+includes: [asyncHelpers.js, compareArray.js]
+flags: [async]
+features: [Array.fromAsync]
+---*/
+
+asyncTest(async function () {
+  const result = await Array.fromAsync("test");
+  assert.compareArray(result, ["t", "e", "s", "t"]);
+});
diff --git a/js/src/tests/test262/built-ins/Array/fromAsync/asyncitems-symbol.js b/js/src/tests/test262/built-ins/Array/fromAsync/asyncitems-symbol.js
new file mode 100644
index 0000000000..335a1d1325
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/fromAsync/asyncitems-symbol.js
@@ -0,0 +1,21 @@
+// |reftest| async
+// Copyright (C) 2022 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.fromasync
+description: >
+  Array.fromAsync treats a Symbol as an array-like
+includes: [asyncHelpers.js, compareArray.js]
+flags: [async]
+features: [Array.fromAsync]
+---*/
+
+asyncTest(async function () {
+  Symbol.prototype.length = 2;
+  Symbol.prototype[0] = 1;
+  Symbol.prototype[1] = 2;
+
+  const result = await Array.fromAsync(Symbol());
+  assert.compareArray(result, [1, 2]);
+});
diff --git a/js/src/tests/test262/built-ins/Array/fromAsync/asyncitems-uses-intrinsic-iterator-symbols.js b/js/src/tests/test262/built-ins/Array/fromAsync/asyncitems-uses-intrinsic-iterator-symbols.js
new file mode 100644
index 0000000000..f0e76c4ae0
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/fromAsync/asyncitems-uses-intrinsic-iterator-symbols.js
@@ -0,0 +1,41 @@
+// |reftest| async
+// Copyright (C) 2023 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.fromasync
+description: >
+  Use the intrinsic @@iterator and @@asyncIterator to check iterability
+includes: [compareArray.js, asyncHelpers.js]
+flags: [async]
+features: [Array.fromAsync]
+---*/
+
+asyncTest(async function () {
+  // Replace the user-reachable Symbol.iterator and Symbol.asyncIterator with
+  // fake symbol keys
+  const originalSymbol = globalThis.Symbol;
+  const fakeIteratorSymbol = Symbol("iterator");
+  const fakeAsyncIteratorSymbol = Symbol("asyncIterator");
+  globalThis.Symbol = {
+    iterator: fakeIteratorSymbol,
+    asyncIterator: fakeAsyncIteratorSymbol,
+  };
+
+  const input = {
+    length: 3,
+    0: 0,
+    1: 1,
+    2: 2,
+    [fakeIteratorSymbol]() {
+      throw new Test262Error("The fake Symbol.iterator method should not be called");
+    },
+    [fakeAsyncIteratorSymbol]() {
+      throw new Test262Error("The fake Symbol.asyncIterator method should not be called");
+    }
+  };
+  const output = await Array.fromAsync(input);
+  assert.compareArray(output, [0, 1, 2]);
+
+  globalThis.Symbol = originalSymbol;
+});
diff --git a/js/src/tests/test262/built-ins/Array/fromAsync/browser.js b/js/src/tests/test262/built-ins/Array/fromAsync/browser.js
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/js/src/tests/test262/built-ins/Array/fromAsync/builtin.js b/js/src/tests/test262/built-ins/Array/fromAsync/builtin.js
new file mode 100644
index 0000000000..79af2825bc
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/fromAsync/builtin.js
@@ -0,0 +1,38 @@
+// Copyright (C) 2022 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.fromasync
+description: Array.fromAsync meets the requirements for built-in objects
+info: |
+  Unless specified otherwise, a built-in object that is callable as a function
+  is a built-in function object with the characteristics described in 10.3.
+  Unless specified otherwise, the [[Extensible]] internal slot of a built-in
+  object initially has the value *true*.
+
+  Unless otherwise specified every built-in function and every built-in
+  constructor has the Function prototype object, which is the initial value of
+  the expression Function.prototype (20.2.3), as the value of its [[Prototype]]
+  internal slot.
+
+  Built-in functions that are not constructors do not have a "prototype"
+  property unless otherwise specified in the description of a particular
+  function.
+features: [Array.fromAsync]
+---*/
+
+assert(Object.isExtensible(Array.fromAsync), "Array.fromAsync is extensible");
+
+assert.sameValue(
+  Object.getPrototypeOf(Array.fromAsync),
+  Function.prototype,
+  "Prototype of Array.fromAsync is Function.prototype"
+);
+
+assert.sameValue(
+  Object.getOwnPropertyDescriptor(Array.fromAsync, "prototype"),
+  undefined,
+  "Array.fromAsync has no own prototype property"
+);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/fromAsync/length.js b/js/src/tests/test262/built-ins/Array/fromAsync/length.js
new file mode 100644
index 0000000000..949b749304
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/fromAsync/length.js
@@ -0,0 +1,28 @@
+// Copyright (C) 2022 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.fromasync
+description: Value and property descriptor of Array.fromAsync.length
+info: |
+  Every built-in function object, including constructors, has a *"length"*
+  property whose value is a non-negative integral Number. Unless otherwise
+  specified, this value is equal to the number of required parameters shown in
+  the subclause heading for the function description. Optional parameters and
+  rest parameters are not included in the parameter count.
+
+  Unless otherwise specified, the *"length"* property of a built-in function
+  object has the attributes { [[Writable]]: *false*, [[Enumerable]]: *false*,
+  [[Configurable]]: *true* }.
+includes: [propertyHelper.js]
+features: [Array.fromAsync]
+---*/
+
+verifyProperty(Array.fromAsync, "length", {
+  value: 1,
+  writable: false,
+  enumerable: false,
+  configurable: true,
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/fromAsync/mapfn-async-arraylike.js b/js/src/tests/test262/built-ins/Array/fromAsync/mapfn-async-arraylike.js
new file mode 100644
index 0000000000..5b6ddf60b1
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/fromAsync/mapfn-async-arraylike.js
@@ -0,0 +1,36 @@
+// |reftest| async
+// Copyright (C) 2023 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.fromasync
+description: >
+  An asynchronous mapping function is applied to each (awaited) item of an
+  arraylike.
+info: |
+  3.k.vii.4. If _mapping_ is *true*, then
+    a. Let _mappedValue_ be ? Call(_mapfn_, _thisArg_, « _nextValue_, 𝔽(_k_) »).
+    b. Let _mappedValue_ be ? Await(_mappedValue_).
+  ...
+  6. Perform ? CreateDataPropertyOrThrow(_A_, _Pk_, _mappedValue_).
+flags: [async]
+includes: [asyncHelpers.js, compareArray.js]
+features: [Array.fromAsync]
+---*/
+
+const arrayLike = {
+  length: 4,
+  0: 0,
+  1: 2,
+  2: Promise.resolve(4),
+  3: 6,
+};
+
+async function asyncMap(val, ix) {
+  return Promise.resolve(val * ix);
+}
+
+asyncTest(async () => {
+  const result = await Array.fromAsync(arrayLike, asyncMap);
+  assert.compareArray(result, [0, 2, 8, 18], "async mapfn should be applied to arraylike");
+});
diff --git a/js/src/tests/test262/built-ins/Array/fromAsync/mapfn-async-iterable-async.js b/js/src/tests/test262/built-ins/Array/fromAsync/mapfn-async-iterable-async.js
new file mode 100644
index 0000000000..c7b01e8aa5
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/fromAsync/mapfn-async-iterable-async.js
@@ -0,0 +1,36 @@
+// |reftest| async
+// Copyright (C) 2023 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.fromasync
+description: >
+  An asynchronous mapping function is applied to each item yielded by an
+  asynchronous iterable.
+info: |
+  3.j.ii.6. If _mapping_ is *true*, then
+    a. Let _mappedValue_ be Call(_mapfn_, _thisArg_, « _nextValue_, 𝔽(_k_) »).
+    ...
+    c. Set _mappedValue_ to Await(_mappedValue_).
+    ...
+  ...
+  8. Let _defineStatus_ be CreateDataPropertyOrThrow(_A_, _Pk_, _mappedValue_).
+flags: [async]
+includes: [asyncHelpers.js, compareArray.js]
+features: [Array.fromAsync]
+---*/
+
+async function* asyncGen() {
+  for (let i = 0; i < 4; i++) {
+    yield Promise.resolve(i * 2);
+  }
+}
+
+async function asyncMap(val, ix) {
+  return Promise.resolve(val * ix);
+}
+
+asyncTest(async () => {
+  const result = await Array.fromAsync({ [Symbol.asyncIterator]: asyncGen }, asyncMap);
+  assert.compareArray(result, [0, 2, 8, 18], "async mapfn should be applied to async iterable");
+});
diff --git a/js/src/tests/test262/built-ins/Array/fromAsync/mapfn-async-iterable-sync.js b/js/src/tests/test262/built-ins/Array/fromAsync/mapfn-async-iterable-sync.js
new file mode 100644
index 0000000000..ded2dfd367
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/fromAsync/mapfn-async-iterable-sync.js
@@ -0,0 +1,36 @@
+// |reftest| async
+// Copyright (C) 2023 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.fromasync
+description: >
+  An asynchronous mapping function is applied to each item yielded by a
+  synchronous iterable.
+info: |
+  3.j.ii.6. If _mapping_ is *true*, then
+    a. Let _mappedValue_ be Call(_mapfn_, _thisArg_, « _nextValue_, 𝔽(_k_) »).
+    ...
+    c. Set _mappedValue_ to Await(_mappedValue_).
+    ...
+  ...
+  8. Let _defineStatus_ be CreateDataPropertyOrThrow(_A_, _Pk_, _mappedValue_).
+flags: [async]
+includes: [asyncHelpers.js, compareArray.js]
+features: [Array.fromAsync]
+---*/
+
+function* syncGen() {
+  for (let i = 0; i < 4; i++) {
+    yield i * 2;
+  }
+}
+
+async function asyncMap(val, ix) {
+  return Promise.resolve(val * ix);
+}
+
+asyncTest(async () => {
+  const result = await Array.fromAsync({ [Symbol.iterator]: syncGen }, asyncMap);
+  assert.compareArray(result, [0, 2, 8, 18], "async mapfn should be applied to sync iterable");
+});
diff --git a/js/src/tests/test262/built-ins/Array/fromAsync/mapfn-async-throws-close-async-iterator.js b/js/src/tests/test262/built-ins/Array/fromAsync/mapfn-async-throws-close-async-iterator.js
new file mode 100644
index 0000000000..e2072a1e39
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/fromAsync/mapfn-async-throws-close-async-iterator.js
@@ -0,0 +1,41 @@
+// |reftest| async
+// Copyright (C) 2023 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.fromasync
+description: >
+  The iterator of an asynchronous iterable is closed when the asynchronous
+  mapping function throws.
+info: |
+  3.j.ii.6. If _mapping_ is *true*, then
+    a. Let _mappedValue_ be Call(_mapfn_, _thisArg_, « _nextValue_, 𝔽(_k_) »).
+    ...
+    c. Set _mappedValue_ to Await(_mappedValue_).
+    d. IfAbruptCloseAsyncIterator(_mappedValue_, _iteratorRecord_).
+flags: [async]
+includes: [asyncHelpers.js]
+features: [Array.fromAsync]
+---*/
+
+let closed = false;
+const iterator = {
+  next() {
+    return Promise.resolve({ value: 1, done: false });
+  },
+  return() {
+    closed = true;
+    return Promise.resolve({ done: true });
+  },
+  [Symbol.asyncIterator]() {
+    return this;
+  }
+}
+
+asyncTest(async () => {
+  await assert.throwsAsync(Error, () => Array.fromAsync(iterator, async (val) => {
+    assert.sameValue(val, 1, "mapfn receives value from iterator");
+    throw new Error("mapfn throws");
+  }), "async mapfn rejecting should cause fromAsync to reject");
+  assert(closed, "async mapfn rejecting should close iterator")
+});
diff --git a/js/src/tests/test262/built-ins/Array/fromAsync/mapfn-async-throws-close-sync-iterator.js b/js/src/tests/test262/built-ins/Array/fromAsync/mapfn-async-throws-close-sync-iterator.js
new file mode 100644
index 0000000000..7a9480a698
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/fromAsync/mapfn-async-throws-close-sync-iterator.js
@@ -0,0 +1,41 @@
+// |reftest| async
+// Copyright (C) 2023 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.fromasync
+description: >
+  The iterator of a synchronous iterable is closed when the asynchronous mapping
+  function throws.
+info: |
+  3.j.ii.6. If _mapping_ is *true*, then
+    a. Let _mappedValue_ be Call(_mapfn_, _thisArg_, « _nextValue_, 𝔽(_k_) »).
+    ...
+    c. Set _mappedValue_ to Await(_mappedValue_).
+    d. IfAbruptCloseAsyncIterator(_mappedValue_, _iteratorRecord_).
+flags: [async]
+includes: [asyncHelpers.js]
+features: [Array.fromAsync]
+---*/
+
+let closed = false;
+const iterator = {
+  next() {
+    return { value: 1, done: false };
+  },
+  return() {
+    closed = true;
+    return { done: true };
+  },
+  [Symbol.iterator]() {
+    return this;
+  }
+}
+
+asyncTest(async () => {
+  await assert.throwsAsync(Error, () => Array.fromAsync(iterator, async (val) => {
+    assert.sameValue(val, 1, "mapfn receives value from iterator");
+    throw new Error("mapfn throws");
+  }), "async mapfn rejecting should cause fromAsync to reject");
+  assert(closed, "async mapfn rejecting should close iterator")
+});
diff --git a/js/src/tests/test262/built-ins/Array/fromAsync/mapfn-async-throws.js b/js/src/tests/test262/built-ins/Array/fromAsync/mapfn-async-throws.js
new file mode 100644
index 0000000000..663e2c9338
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/fromAsync/mapfn-async-throws.js
@@ -0,0 +1,24 @@
+// |reftest| async
+// Copyright (C) 2023 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.fromasync
+description: >
+  The output promise rejects if the asynchronous mapping function rejects.
+info: |
+  3.j.ii.6. If _mapping_ is *true*, then
+    a. Let _mappedValue_ be Call(_mapfn_, _thisArg_, « _nextValue_, 𝔽(_k_) »).
+    ...
+    c. Set _mappedValue_ to Await(_mappedValue_).
+    d. IfAbruptCloseAsyncIterator(_mappedValue_, _iteratorRecord_).
+flags: [async]
+includes: [asyncHelpers.js]
+features: [Array.fromAsync]
+---*/
+
+asyncTest(async () => {
+  await assert.throwsAsync(Test262Error, () => Array.fromAsync([1, 2, 3], async () => {
+    throw new Test262Error("mapfn throws");
+  }), "async mapfn rejecting should cause fromAsync to reject");
+});
diff --git a/js/src/tests/test262/built-ins/Array/fromAsync/mapfn-not-callable.js b/js/src/tests/test262/built-ins/Array/fromAsync/mapfn-not-callable.js
new file mode 100644
index 0000000000..7f6e901f1c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/fromAsync/mapfn-not-callable.js
@@ -0,0 +1,26 @@
+// |reftest| async
+// Copyright (C) 2022 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.fromasync
+description: >
+  A TypeError is thrown if the mapfn argument to Array.fromAsync is not callable
+info: |
+  3.a. If _mapfn_ is *undefined*, let _mapping_ be *false*.
+    b. Else,
+      i. If IsCallable(_mapfn_) is *false*, throw a *TypeError* exception.
+flags: [async]
+includes: [asyncHelpers.js]
+features: [Array.fromAsync, BigInt, Symbol]
+---*/
+
+asyncTest(async () => {
+  await assert.throwsAsync(TypeError, () => Array.fromAsync([], null), "null mapfn");
+  await assert.throwsAsync(TypeError, () => Array.fromAsync([], {}), "non-callable object mapfn");
+  await assert.throwsAsync(TypeError, () => Array.fromAsync([], "String"), "string mapfn");
+  await assert.throwsAsync(TypeError, () => Array.fromAsync([], true), "boolean mapfn");
+  await assert.throwsAsync(TypeError, () => Array.fromAsync([], 3.1416), "number mapfn");
+  await assert.throwsAsync(TypeError, () => Array.fromAsync([], 42n), "bigint mapfn");
+  await assert.throwsAsync(TypeError, () => Array.fromAsync([], Symbol()), "symbol mapfn");
+});
diff --git a/js/src/tests/test262/built-ins/Array/fromAsync/mapfn-result-awaited-once-per-iteration.js b/js/src/tests/test262/built-ins/Array/fromAsync/mapfn-result-awaited-once-per-iteration.js
new file mode 100644
index 0000000000..c7d9a0a901
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/fromAsync/mapfn-result-awaited-once-per-iteration.js
@@ -0,0 +1,48 @@
+// |reftest| async
+// Copyright (C) 2023 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.fromasync
+description: >
+  The returned value from each invocation of the asynchronous mapping function
+  is awaited exactly once.
+info: |
+  3.j.ii.6. If _mapping_ is *true*, then
+    a. Let _mappedValue_ be Call(_mapfn_, _thisArg_, « _nextValue_, 𝔽(_k_) »).
+    ...
+    c. Set _mappedValue_ to Await(_mappedValue_).
+flags: [async]
+includes: [asyncHelpers.js, compareArray.js, temporalHelpers.js]
+features: [Array.fromAsync]
+---*/
+
+const calls = [];
+const expected = [
+  "call mapping",
+  "get thenable_0.then",
+  "call thenable_0.then",
+  "call mapping",
+  "get thenable_1.then",
+  "call thenable_1.then",
+  "call mapping",
+  "get thenable_2.then",
+  "call thenable_2.then",
+];
+
+function mapping(val, ix) {
+  calls.push("call mapping");
+  const thenableName = `thenable_${ix}`;
+  return TemporalHelpers.propertyBagObserver(calls, {
+    then(resolve, reject) {
+      calls.push(`call ${thenableName}.then`);
+      resolve(val * 2);
+    }
+  }, thenableName)
+}
+
+asyncTest(async () => {
+  const result = await Array.fromAsync([1, 2, 3], mapping);
+  assert.compareArray(result, [2, 4, 6], "mapping function applied");
+  assert.compareArray(calls, expected, "observable operations");
+});
diff --git a/js/src/tests/test262/built-ins/Array/fromAsync/mapfn-sync-arraylike.js b/js/src/tests/test262/built-ins/Array/fromAsync/mapfn-sync-arraylike.js
new file mode 100644
index 0000000000..3d033f97f3
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/fromAsync/mapfn-sync-arraylike.js
@@ -0,0 +1,36 @@
+// |reftest| async
+// Copyright (C) 2023 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.fromasync
+description: >
+  A synchronous mapping function is applied to each (awaited) item of an
+  arraylike.
+info: |
+  3.k.vii.4. If _mapping_ is *true*, then
+    a. Let _mappedValue_ be ? Call(_mapfn_, _thisArg_, « _nextValue_, 𝔽(_k_) »).
+    ...
+  ...
+  6. Perform ? CreateDataPropertyOrThrow(_A_, _Pk_, _mappedValue_).
+flags: [async]
+includes: [asyncHelpers.js, compareArray.js]
+features: [Array.fromAsync]
+---*/
+
+const arrayLike = {
+  length: 4,
+  0: 0,
+  1: 2,
+  2: Promise.resolve(4),
+  3: 6,
+};
+
+function syncMap(val, ix) {
+  return val * ix;
+}
+
+asyncTest(async () => {
+  const result = await Array.fromAsync(arrayLike, syncMap);
+  assert.compareArray(result, [0, 2, 8, 18], "sync mapfn should be applied to arraylike");
+});
diff --git a/js/src/tests/test262/built-ins/Array/fromAsync/mapfn-sync-iterable-async.js b/js/src/tests/test262/built-ins/Array/fromAsync/mapfn-sync-iterable-async.js
new file mode 100644
index 0000000000..c790fedc82
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/fromAsync/mapfn-sync-iterable-async.js
@@ -0,0 +1,34 @@
+// |reftest| async
+// Copyright (C) 2023 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.fromasync
+description: >
+  A synchronous mapping function is applied to each item yielded by an
+  asynchronous iterable.
+info: |
+  3.j.ii.6. If _mapping_ is *true*, then
+    a. Let _mappedValue_ be Call(_mapfn_, _thisArg_, « _nextValue_, 𝔽(_k_) »).
+    ...
+  ...
+  8. Let _defineStatus_ be CreateDataPropertyOrThrow(_A_, _Pk_, _mappedValue_).
+flags: [async]
+includes: [asyncHelpers.js, compareArray.js]
+features: [Array.fromAsync]
+---*/
+
+async function* asyncGen() {
+  for (let i = 0; i < 4; i++) {
+    yield Promise.resolve(i * 2);
+  }
+}
+
+function syncMap(val, ix) {
+  return val * ix;
+}
+
+asyncTest(async () => {
+  const result = await Array.fromAsync({ [Symbol.asyncIterator]: asyncGen }, syncMap);
+  assert.compareArray(result, [0, 2, 8, 18], "sync mapfn should be applied to async iterable");
+});
diff --git a/js/src/tests/test262/built-ins/Array/fromAsync/mapfn-sync-iterable-sync.js b/js/src/tests/test262/built-ins/Array/fromAsync/mapfn-sync-iterable-sync.js
new file mode 100644
index 0000000000..97d7fe89c4
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/fromAsync/mapfn-sync-iterable-sync.js
@@ -0,0 +1,34 @@
+// |reftest| async
+// Copyright (C) 2023 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.fromasync
+description: >
+  A synchronous mapping function is applied to each item yielded by a
+  synchronous iterable.
+info: |
+  3.j.ii.6. If _mapping_ is *true*, then
+    a. Let _mappedValue_ be Call(_mapfn_, _thisArg_, « _nextValue_, 𝔽(_k_) »).
+    ...
+  ...
+  8. Let _defineStatus_ be CreateDataPropertyOrThrow(_A_, _Pk_, _mappedValue_).
+flags: [async]
+includes: [asyncHelpers.js, compareArray.js]
+features: [Array.fromAsync]
+---*/
+
+function* syncGen() {
+  for (let i = 0; i < 4; i++) {
+    yield i * 2;
+  }
+}
+
+function syncMap(val, ix) {
+  return val * ix;
+}
+
+asyncTest(async () => {
+  const result = await Array.fromAsync({ [Symbol.iterator]: syncGen }, syncMap);
+  assert.compareArray(result, [0, 2, 8, 18], "sync mapfn should be applied to sync iterable");
+});
diff --git a/js/src/tests/test262/built-ins/Array/fromAsync/mapfn-sync-throws-close-async-iterator.js b/js/src/tests/test262/built-ins/Array/fromAsync/mapfn-sync-throws-close-async-iterator.js
new file mode 100644
index 0000000000..a351445f1d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/fromAsync/mapfn-sync-throws-close-async-iterator.js
@@ -0,0 +1,40 @@
+// |reftest| async
+// Copyright (C) 2023 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.fromasync
+description: >
+  The iterator of an asynchronous iterable is closed when the synchronous
+  mapping function throws.
+info: |
+  3.j.ii.6. If _mapping_ is *true*, then
+    a. Let _mappedValue_ be Call(_mapfn_, _thisArg_, « _nextValue_, 𝔽(_k_) »).
+    b. IfAbruptCloseAsyncIterator(_mappedValue_, _iteratorRecord_).
+    ...
+flags: [async]
+includes: [asyncHelpers.js]
+features: [Array.fromAsync]
+---*/
+
+let closed = false;
+const iterator = {
+  next() {
+    return Promise.resolve({ value: 1, done: false });
+  },
+  return() {
+    closed = true;
+    return Promise.resolve({ done: true });
+  },
+  [Symbol.asyncIterator]() {
+    return this;
+  }
+}
+
+asyncTest(async () => {
+  await assert.throwsAsync(Error, () => Array.fromAsync(iterator, (val) => {
+    assert.sameValue(val, 1, "mapfn receives value from iterator");
+    throw new Error("mapfn throws");
+  }), "sync mapfn throwing should cause fromAsync to reject");
+  assert(closed, "sync mapfn throwing should close iterator")
+});
diff --git a/js/src/tests/test262/built-ins/Array/fromAsync/mapfn-sync-throws-close-sync-iterator.js b/js/src/tests/test262/built-ins/Array/fromAsync/mapfn-sync-throws-close-sync-iterator.js
new file mode 100644
index 0000000000..3ea9e73e6d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/fromAsync/mapfn-sync-throws-close-sync-iterator.js
@@ -0,0 +1,40 @@
+// |reftest| async
+// Copyright (C) 2023 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.fromasync
+description: >
+  The iterator of a synchronous iterable is closed when the synchronous mapping
+  function throws.
+info: |
+  3.j.ii.6. If _mapping_ is *true*, then
+    a. Let _mappedValue_ be Call(_mapfn_, _thisArg_, « _nextValue_, 𝔽(_k_) »).
+    b. IfAbruptCloseAsyncIterator(_mappedValue_, _iteratorRecord_).
+    ...
+flags: [async]
+includes: [asyncHelpers.js]
+features: [Array.fromAsync]
+---*/
+
+let closed = false;
+const iterator = {
+  next() {
+    return { value: 1, done: false };
+  },
+  return() {
+    closed = true;
+    return { done: true };
+  },
+  [Symbol.iterator]() {
+    return this;
+  }
+}
+
+asyncTest(async () => {
+  await assert.throwsAsync(Error, () => Array.fromAsync(iterator, (val) => {
+    assert.sameValue(val, 1, "mapfn receives value from iterator");
+    throw new Error("mapfn throws");
+  }), "sync mapfn throwing should cause fromAsync to reject");
+  assert(closed, "sync mapfn throwing should close iterator")
+});
diff --git a/js/src/tests/test262/built-ins/Array/fromAsync/mapfn-sync-throws.js b/js/src/tests/test262/built-ins/Array/fromAsync/mapfn-sync-throws.js
new file mode 100644
index 0000000000..cea2ff3a60
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/fromAsync/mapfn-sync-throws.js
@@ -0,0 +1,23 @@
+// |reftest| async
+// Copyright (C) 2023 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.fromasync
+description: >
+  The output promise rejects if the synchronous mapping function throws.
+info: |
+  3.j.ii.6. If _mapping_ is *true*, then
+    a. Let _mappedValue_ be Call(_mapfn_, _thisArg_, « _nextValue_, 𝔽(_k_) »).
+    b. IfAbruptCloseAsyncIterator(_mappedValue_, _iteratorRecord_).
+    ...
+flags: [async]
+includes: [asyncHelpers.js]
+features: [Array.fromAsync]
+---*/
+
+asyncTest(async () => {
+  await assert.throwsAsync(Test262Error, () => Array.fromAsync([1, 2, 3], () => {
+    throw new Test262Error("mapfn throws");
+  }), "sync mapfn throwing should cause fromAsync to reject");
+});
diff --git a/js/src/tests/test262/built-ins/Array/fromAsync/name.js b/js/src/tests/test262/built-ins/Array/fromAsync/name.js
new file mode 100644
index 0000000000..e335122192
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/fromAsync/name.js
@@ -0,0 +1,28 @@
+// Copyright (C) 2022 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.fromasync
+description: Value and property descriptor of Array.fromAsync.name
+info: |
+  Every built-in function object, including constructors, has a *"name"*
+  property whose value is a String. Unless otherwise specified, this value is
+  the name that is given to the function in this specification. [...]
+  For functions that are specified as properties of objects, the name value is
+  the property name string used to access the function.
+
+  Unless otherwise specified, the *"name"* property of a built-in function
+  object has the attributes { [[Writable]]: *false*, [[Enumerable]]: *false*,
+  [[Configurable]]: true }.
+includes: [propertyHelper.js]
+features: [Array.fromAsync]
+---*/
+
+verifyProperty(Array.fromAsync, "name", {
+  value: "fromAsync",
+  writable: false,
+  enumerable: false,
+  configurable: true,
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/fromAsync/non-iterable-input-does-not-use-array-prototype.js b/js/src/tests/test262/built-ins/Array/fromAsync/non-iterable-input-does-not-use-array-prototype.js
new file mode 100644
index 0000000000..ba639aae1b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/fromAsync/non-iterable-input-does-not-use-array-prototype.js
@@ -0,0 +1,47 @@
+// |reftest| async
+// Copyright (C) 2023 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.fromasync
+description: Non-iterable input does not use Array.prototype
+includes: [compareArray.js, asyncHelpers.js]
+flags: [async]
+features: [Array.fromAsync]
+---*/
+
+asyncTest(async function () {
+const arrayIterator = [].values();
+const IntrinsicArrayIteratorPrototype =
+Object.getPrototypeOf(arrayIterator);
+const intrinsicArrayIteratorPrototypeNext =
+IntrinsicArrayIteratorPrototype.next;
+
+try {
+// Temporarily mutate the array iterator prototype to have an invalid
+// “next” method. Just like Array.from, the fromAsync function should
+// still work on non-iterable arraylike arguments.
+IntrinsicArrayIteratorPrototype.next = function fakeNext () {
+  throw new Test262Error(
+    'This fake next function should not be called; ' +
+    'instead, each element should have been directly accessed.',
+  );
+};
+
+const expected = [ 0, 1, 2 ];
+const input = {
+  length: 3,
+  0: 0,
+  1: 1,
+  2: 2,
+};
+const output = await Array.fromAsync(input);
+assert.compareArray(output, expected);
+}
+
+finally {
+// Reset the intrinsic array iterator
+IntrinsicArrayIteratorPrototype.next =
+  intrinsicArrayIteratorPrototypeNext;
+}
+});
diff --git a/js/src/tests/test262/built-ins/Array/fromAsync/non-iterable-input-element-access-err.js b/js/src/tests/test262/built-ins/Array/fromAsync/non-iterable-input-element-access-err.js
new file mode 100644
index 0000000000..edbf4de710
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/fromAsync/non-iterable-input-element-access-err.js
@@ -0,0 +1,22 @@
+// |reftest| async
+// Copyright (C) 2023 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.fromasync
+description: Result promise rejects if element access fails
+includes: [asyncHelpers.js]
+flags: [async]
+features: [Array.fromAsync]
+---*/
+
+asyncTest(async function () {
+  const input = {
+    length: 1,
+    get 0 () {
+      throw new Test262Error;
+    },
+  };
+  const outputPromise = Array.fromAsync(input);
+  assert.throwsAsync(Test262Error, () => outputPromise);
+});
diff --git a/js/src/tests/test262/built-ins/Array/fromAsync/non-iterable-input-with-thenable-async-mapped-awaits-callback-result-once.js b/js/src/tests/test262/built-ins/Array/fromAsync/non-iterable-input-with-thenable-async-mapped-awaits-callback-result-once.js
new file mode 100644
index 0000000000..9bb78973a0
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/fromAsync/non-iterable-input-with-thenable-async-mapped-awaits-callback-result-once.js
@@ -0,0 +1,33 @@
+// |reftest| async
+// Copyright (C) 2023 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.fromasync
+description: Non-iterable input with thenable result with async mapped awaits each callback result once.
+includes: [asyncHelpers.js]
+flags: [async]
+features: [Array.fromAsync]
+---*/
+
+asyncTest(async function () {
+  let awaitCounter = 0;
+  const input = {
+    length: 3,
+    0: 0,
+    1: Promise.resolve(1),
+    2: Promise.resolve(2),
+    3: Promise.resolve(3), // This is ignored because the length is 3.
+  };
+  await Array.fromAsync(input, async v => {
+    return {
+      // This “then” method should occur three times:
+      // one for each value from the input.
+      then (resolve, reject) {
+        awaitCounter ++;
+        resolve(v);
+      },
+    };
+  });
+  assert.sameValue(awaitCounter, 3);
+});
diff --git a/js/src/tests/test262/built-ins/Array/fromAsync/non-iterable-input-with-thenable-async-mapped-callback-err.js b/js/src/tests/test262/built-ins/Array/fromAsync/non-iterable-input-with-thenable-async-mapped-callback-err.js
new file mode 100644
index 0000000000..edc811b792
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/fromAsync/non-iterable-input-with-thenable-async-mapped-callback-err.js
@@ -0,0 +1,28 @@
+// |reftest| async
+// Copyright (C) 2023 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.fromasync
+description: Non-iterable input with thenable result promise rejects if async map function callback throws. 
+includes: [asyncHelpers.js]
+flags: [async]
+features: [Array.fromAsync]
+---*/
+
+asyncTest(async function () {
+  const expectedValue = {};
+  const inputThenable = {
+    then (resolve, reject) {
+      resolve(expectedValue);
+    },
+  };
+  const input = {
+    length: 1,
+    0: inputThenable,
+  };
+  const outputPromise = Array.fromAsync(input, async v => {
+    throw new Test262Error;
+  });
+  assert.throwsAsync(Test262Error, () => outputPromise);
+});
diff --git a/js/src/tests/test262/built-ins/Array/fromAsync/non-iterable-input-with-thenable-element-rejects.js b/js/src/tests/test262/built-ins/Array/fromAsync/non-iterable-input-with-thenable-element-rejects.js
new file mode 100644
index 0000000000..f7b63c219e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/fromAsync/non-iterable-input-with-thenable-element-rejects.js
@@ -0,0 +1,27 @@
+// |reftest| async
+// Copyright (C) 2023 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.fromasync
+description: Non-iterable input with thenable result promise rejects if thenable element rejects.
+includes: [asyncHelpers.js]
+flags: [async]
+features: [Array.fromAsync]
+---*/
+
+asyncTest(async function () {
+  const expectedValue = {};
+  const expected = [ expectedValue ];
+  const inputThenable = {
+    then (resolve, reject) {
+      reject(new Test262Error);
+    },
+  };
+  const input = {
+    length: 1,
+    0: inputThenable,
+  };
+  const output = Array.fromAsync(input);
+  await assert.throwsAsync(Test262Error, () => output);
+});
diff --git a/js/src/tests/test262/built-ins/Array/fromAsync/non-iterable-input-with-thenable-sync-mapped-callback-err.js b/js/src/tests/test262/built-ins/Array/fromAsync/non-iterable-input-with-thenable-sync-mapped-callback-err.js
new file mode 100644
index 0000000000..c1543fe582
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/fromAsync/non-iterable-input-with-thenable-sync-mapped-callback-err.js
@@ -0,0 +1,22 @@
+// |reftest| async
+// Copyright (C) 2023 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.fromasync
+description: Non iterable result promise rejects if sync map function callback throws.
+includes: [asyncHelpers.js]
+flags: [async]
+features: [Array.fromAsync]
+---*/
+
+asyncTest(async function () {
+  const input = {
+    length: 1,
+    0: 0,
+  };
+  const outputPromise = Array.fromAsync(input, v => {
+    throw new Test262Error;
+  });
+  assert.throwsAsync(Test262Error, () => outputPromise);
+});
diff --git a/js/src/tests/test262/built-ins/Array/fromAsync/non-iterable-input-with-thenable.js b/js/src/tests/test262/built-ins/Array/fromAsync/non-iterable-input-with-thenable.js
new file mode 100644
index 0000000000..f37f8d01f5
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/fromAsync/non-iterable-input-with-thenable.js
@@ -0,0 +1,25 @@
+// |reftest| async
+// Copyright (C) 2023 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.fromasync
+description: >
+  Non iterable input with thenables is transferred to the output array.
+includes: [compareArray.js, asyncHelpers.js]
+flags: [async]
+features: [Array.fromAsync]
+---*/
+
+asyncTest(async function () {
+  const expected = [ 0, 1, 2 ];
+  const input = {
+    length: 3,
+    0: 0,
+    1: Promise.resolve(1),
+    2: Promise.resolve(2),
+    3: Promise.resolve(3), // This is ignored because the length is 3.
+  };
+  const output = await Array.fromAsync(input);
+  assert.compareArray(output, expected);
+});
diff --git a/js/src/tests/test262/built-ins/Array/fromAsync/non-iterable-input.js b/js/src/tests/test262/built-ins/Array/fromAsync/non-iterable-input.js
new file mode 100644
index 0000000000..3e0fd5994f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/fromAsync/non-iterable-input.js
@@ -0,0 +1,25 @@
+// |reftest| async
+// Copyright (C) 2023 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.fromasync
+description: >
+  Non iterable input without thenables is transferred to the output array.
+includes: [compareArray.js, asyncHelpers.js]
+flags: [async]
+features: [Array.fromAsync]
+---*/
+
+asyncTest(async function () {
+  const expected = [ 0, 1, 2 ];
+  const input = {
+    length: 3,
+    0: 0,
+    1: 1,
+    2: 2,
+    3: 3, // This is ignored because the length is 3.
+  };
+  const output = await Array.fromAsync(input);
+  assert.compareArray(output, expected);
+});
diff --git a/js/src/tests/test262/built-ins/Array/fromAsync/non-iterable-sync-mapped-callback-err.js b/js/src/tests/test262/built-ins/Array/fromAsync/non-iterable-sync-mapped-callback-err.js
new file mode 100644
index 0000000000..72f48cce56
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/fromAsync/non-iterable-sync-mapped-callback-err.js
@@ -0,0 +1,28 @@
+// |reftest| async
+// Copyright (C) 2023 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.fromasync
+description: Non iterable input with thenables awaits each input once without mapping callback
+includes: [asyncHelpers.js]
+flags: [async]
+features: [Array.fromAsync]
+---*/
+
+asyncTest(async function () {
+  const expectedValue = {};
+  const inputThenable = {
+    then (resolve, reject) {
+      resolve(expectedValue);
+    },
+  };
+  const input = {
+    length: 1,
+    0: inputThenable,
+  };
+  const outputPromise = Array.fromAsync(input, v => {
+    throw new Test262Error;
+  });
+  await assert.throwsAsync(Test262Error, () => outputPromise);
+});
diff --git a/js/src/tests/test262/built-ins/Array/fromAsync/non-iterable-with-non-promise-thenable.js b/js/src/tests/test262/built-ins/Array/fromAsync/non-iterable-with-non-promise-thenable.js
new file mode 100644
index 0000000000..89388e2790
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/fromAsync/non-iterable-with-non-promise-thenable.js
@@ -0,0 +1,27 @@
+// |reftest| async
+// Copyright (C) 2023 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.fromasync
+description: Non iterable input with non-promise thenables works.
+includes: [compareArray.js, asyncHelpers.js]
+flags: [async]
+features: [Array.fromAsync]
+---*/
+
+asyncTest(async function () {
+  const expectedValue = {};
+  const expected = [ expectedValue ];
+  const inputThenable = {
+    then (resolve, reject) {
+      resolve(expectedValue);
+    },
+  };
+  const input = {
+    length: 1,
+    0: inputThenable,
+  };
+  const output = await Array.fromAsync(input);
+  assert.compareArray(output, expected);
+});
diff --git a/js/src/tests/test262/built-ins/Array/fromAsync/non-iterable-with-thenable-async-mapped-awaits-once.js b/js/src/tests/test262/built-ins/Array/fromAsync/non-iterable-with-thenable-async-mapped-awaits-once.js
new file mode 100644
index 0000000000..080a9e6300
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/fromAsync/non-iterable-with-thenable-async-mapped-awaits-once.js
@@ -0,0 +1,30 @@
+// |reftest| async
+// Copyright (C) 2023 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.fromasync
+description: >
+  Non-iterable input with thenables awaits each input once without mapping callback
+includes: [asyncHelpers.js]
+flags: [async]
+features: [Array.fromAsync]
+---*/
+
+asyncTest(async function () {
+  const expectedValue = {};
+  const expected = [ expectedValue ];
+  let awaitCounter = 0;
+  const inputThenable = {
+    then (resolve, reject) {
+      awaitCounter++;
+      resolve(expectedValue);
+    },
+  };
+  const input = {
+    length: 1,
+    0: inputThenable,
+  };
+  await Array.fromAsync(input, async v => v);
+  assert.sameValue(awaitCounter, 1);
+});
diff --git a/js/src/tests/test262/built-ins/Array/fromAsync/non-iterable-with-thenable-awaits-once.js b/js/src/tests/test262/built-ins/Array/fromAsync/non-iterable-with-thenable-awaits-once.js
new file mode 100644
index 0000000000..89dbdc5c86
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/fromAsync/non-iterable-with-thenable-awaits-once.js
@@ -0,0 +1,28 @@
+// |reftest| async
+// Copyright (C) 2023 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.fromasync
+description: Non-iterable with thenables awaits each input value once without mapping callback.
+includes: [asyncHelpers.js]
+flags: [async]
+features: [Array.fromAsync]
+---*/
+
+asyncTest(async function () {
+  const expectedValue = {};
+  let awaitCounter = 0;
+  const inputThenable = {
+    then (resolve, reject) {
+      awaitCounter ++;
+      resolve(expectedValue);
+    },
+  };
+  const input = {
+    length: 1,
+    0: inputThenable,
+  };
+ await Array.fromAsync(input);
+ assert.sameValue(awaitCounter, 1);
+});
diff --git a/js/src/tests/test262/built-ins/Array/fromAsync/non-iterable-with-thenable-sync-mapped-awaits-once.js b/js/src/tests/test262/built-ins/Array/fromAsync/non-iterable-with-thenable-sync-mapped-awaits-once.js
new file mode 100644
index 0000000000..a410783234
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/fromAsync/non-iterable-with-thenable-sync-mapped-awaits-once.js
@@ -0,0 +1,29 @@
+// |reftest| async
+// Copyright (C) 2023 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.fromasync
+description: >
+  Non-iterable input with thenables awaits each input once with mapping callback
+includes: [asyncHelpers.js]
+flags: [async]
+features: [Array.fromAsync]
+---*/
+
+asyncTest(async function () {
+  const expectedValue = {};
+  let awaitCounter = 0;
+  const inputThenable = {
+    then (resolve, reject) {
+      awaitCounter++;
+      resolve(expectedValue);
+    },
+  };
+  const input = {
+    length: 1,
+    0: inputThenable,
+  };
+  await Array.fromAsync(input, v => v);
+  assert.sameValue(awaitCounter, 1);
+});
diff --git a/js/src/tests/test262/built-ins/Array/fromAsync/non-iterable-with-thenable-then-method-err.js b/js/src/tests/test262/built-ins/Array/fromAsync/non-iterable-with-thenable-then-method-err.js
new file mode 100644
index 0000000000..4175c353f2
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/fromAsync/non-iterable-with-thenable-then-method-err.js
@@ -0,0 +1,25 @@
+// |reftest| async
+// Copyright (C) 2023 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.fromasync
+description: Non-iterable input with thenable result promise is rejected if element's then method throws.
+includes: [asyncHelpers.js]
+flags: [async]
+features: [Array.fromAsync]
+---*/
+
+asyncTest(async function () {
+  const inputThenable = {
+    then (resolve, reject) {
+      throw new Test262Error;
+    },
+  };
+  const input = {
+    length: 1,
+    0: inputThenable,
+  };
+  const outputPromise = Array.fromAsync(input);
+  assert.throwsAsync(Test262Error, () => outputPromise);
+});
diff --git a/js/src/tests/test262/built-ins/Array/fromAsync/not-a-constructor.js b/js/src/tests/test262/built-ins/Array/fromAsync/not-a-constructor.js
new file mode 100644
index 0000000000..428ea909e6
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/fromAsync/not-a-constructor.js
@@ -0,0 +1,19 @@
+// Copyright (C) 2022 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.fromasync
+description: Array.fromAsync is not a constructor
+info: |
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in the
+  description of a particular function.
+includes: [isConstructor.js]
+features: [Array.fromAsync, Reflect.construct]
+---*/
+
+assert(!isConstructor(Array.fromAsync), "Array.fromAsync is not a constructor");
+
+assert.throws(TypeError, () => new Array.fromAsync(), "Array.fromAsync throws when constructed");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/fromAsync/prop-desc.js b/js/src/tests/test262/built-ins/Array/fromAsync/prop-desc.js
new file mode 100644
index 0000000000..803cc989dd
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/fromAsync/prop-desc.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2022 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.fromasync
+description: Type and property descriptor of Array.fromAsync
+info: |
+  Every other data property described in clauses 19 through 28 and in Annex B.2
+  has the attributes { [[Writable]]: *true*, [[Enumerable]]: *false*,
+  [[Configurable]]: *true* } unless otherwise specified.
+includes: [propertyHelper.js]
+features: [Array.fromAsync]
+---*/
+
+assert.sameValue(typeof Array.fromAsync, "function", "Array.fromAsync is callable");
+
+verifyProperty(Array, 'fromAsync', {
+  writable: true,
+  enumerable: false,
+  configurable: true,
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/fromAsync/returned-promise-resolves-to-array.js b/js/src/tests/test262/built-ins/Array/fromAsync/returned-promise-resolves-to-array.js
new file mode 100644
index 0000000000..b6ccf790af
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/fromAsync/returned-promise-resolves-to-array.js
@@ -0,0 +1,23 @@
+// |reftest| async
+// Copyright (C) 2023 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.fromasync
+description: >
+  Array.fromAsync returns a Promise that resolves to an Array in the normal case
+info: |
+  1. Let _C_ be the *this* value.
+  ...
+  3.e. If IsConstructor(_C_) is *true*, then
+    i. Let _A_ be ? Construct(_C_).
+features: [Array.fromAsync]
+flags: [async]
+includes: [asyncHelpers.js]
+---*/
+
+asyncTest(async function () {
+  const promise = Array.fromAsync([0, 1, 2]);
+  const array = await promise;
+  assert(Array.isArray(array), "Array.fromAsync returns a Promise that resolves to an Array");
+});
diff --git a/js/src/tests/test262/built-ins/Array/fromAsync/returns-promise.js b/js/src/tests/test262/built-ins/Array/fromAsync/returns-promise.js
new file mode 100644
index 0000000000..a8b456d66e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/fromAsync/returns-promise.js
@@ -0,0 +1,36 @@
+// |reftest| async
+// Copyright (C) 2023 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.fromasync
+description: Array.fromAsync returns a Promise
+info: |
+  5. Return _promiseCapability_.[[Promise]].
+flags: [async]
+includes: [asyncHelpers.js]
+features: [Array.fromAsync]
+---*/
+
+asyncTest(async function () {
+  let p = Array.fromAsync([0, 1, 2]);
+
+  assert(p instanceof Promise, "Array.fromAsync returns a Promise");
+  assert.sameValue(
+    Object.getPrototypeOf(p),
+    Promise.prototype,
+    "Array.fromAsync returns an object with prototype Promise.prototype"
+  );
+
+  p = Array.fromAsync([0, 1, 2], () => {
+    throw new Test262Error("this will make the Promise reject");
+  })
+  assert(p instanceof Promise, "Array.fromAsync returns a Promise even on error");
+  assert.sameValue(
+    Object.getPrototypeOf(p),
+    Promise.prototype,
+    "Array.fromAsync returns an object with prototype Promise.prototype even on error"
+  );
+
+  await assert.throwsAsync(Test262Error, () => p, "Prevent unhandled rejection");
+});
diff --git a/js/src/tests/test262/built-ins/Array/fromAsync/shell.js b/js/src/tests/test262/built-ins/Array/fromAsync/shell.js
new file mode 100644
index 0000000000..3489e7ef68
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/fromAsync/shell.js
@@ -0,0 +1,2271 @@
+// GENERATED, DO NOT EDIT
+// file: asyncHelpers.js
+// Copyright (C) 2022 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+description: |
+    A collection of assertion and wrapper functions for testing asynchronous built-ins.
+defines: [asyncTest]
+---*/
+
+function asyncTest(testFunc) {
+  if (!Object.hasOwn(globalThis, "$DONE")) {
+    throw new Test262Error("asyncTest called without async flag");
+  }
+  if (typeof testFunc !== "function") {
+    $DONE(new Test262Error("asyncTest called with non-function argument"));
+    return;
+  }
+  try {
+    testFunc().then(
+      function () {
+        $DONE();
+      },
+      function (error) {
+        $DONE(error);
+      }
+    );
+  } catch (syncError) {
+    $DONE(syncError);
+  }
+}
+
+assert.throwsAsync = async function (expectedErrorConstructor, func, message) {
+  var innerThenable;
+  if (message === undefined) {
+    message = "";
+  } else {
+    message += " ";
+  }
+  if (typeof func === "function") {
+    try {
+      innerThenable = func();
+      if (
+        innerThenable === null ||
+        typeof innerThenable !== "object" ||
+        typeof innerThenable.then !== "function"
+      ) {
+        message +=
+          "Expected to obtain an inner promise that would reject with a" +
+          expectedErrorConstructor.name +
+          " but result was not a thenable";
+        throw new Test262Error(message);
+      }
+    } catch (thrown) {
+      message +=
+        "Expected a " +
+        expectedErrorConstructor.name +
+        " to be thrown asynchronously but an exception was thrown synchronously while obtaining the inner promise";
+      throw new Test262Error(message);
+    }
+  } else {
+    message +=
+      "assert.throwsAsync called with an argument that is not a function";
+    throw new Test262Error(message);
+  }
+
+  try {
+    return innerThenable.then(
+      function () {
+        message +=
+          "Expected a " +
+          expectedErrorConstructor.name +
+          " to be thrown asynchronously but no exception was thrown at all";
+        throw new Test262Error(message);
+      },
+      function (thrown) {
+        var expectedName, actualName;
+        if (typeof thrown !== "object" || thrown === null) {
+          message += "Thrown value was not an object!";
+          throw new Test262Error(message);
+        } else if (thrown.constructor !== expectedErrorConstructor) {
+          expectedName = expectedErrorConstructor.name;
+          actualName = thrown.constructor.name;
+          if (expectedName === actualName) {
+            message +=
+              "Expected a " +
+              expectedName +
+              " but got a different error constructor with the same name";
+          } else {
+            message +=
+              "Expected a " + expectedName + " but got a " + actualName;
+          }
+          throw new Test262Error(message);
+        }
+      }
+    );
+  } catch (thrown) {
+    if (typeof thrown !== "object" || thrown === null) {
+      message +=
+        "Expected a " +
+        expectedErrorConstructor.name +
+        " to be thrown asynchronously but innerThenable synchronously threw a value that was not an object ";
+    } else {
+      message +=
+        "Expected a " +
+        expectedErrorConstructor.name +
+        " to be thrown asynchronously but a " +
+        thrown.constructor.name +
+        " was thrown synchronously";
+    }
+    throw new Test262Error(message);
+  }
+};
+
+// file: temporalHelpers.js
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+description: |
+    This defines helper objects and functions for testing Temporal.
+defines: [TemporalHelpers]
+features: [Symbol.species, Symbol.iterator, Temporal]
+---*/
+
+const ASCII_IDENTIFIER = /^[$_a-zA-Z][$_a-zA-Z0-9]*$/u;
+
+function formatPropertyName(propertyKey, objectName = "") {
+  switch (typeof propertyKey) {
+    case "symbol":
+      if (Symbol.keyFor(propertyKey) !== undefined) {
+        return `${objectName}[Symbol.for('${Symbol.keyFor(propertyKey)}')]`;
+      } else if (propertyKey.description.startsWith('Symbol.')) {
+        return `${objectName}[${propertyKey.description}]`;
+      } else {
+        return `${objectName}[Symbol('${propertyKey.description}')]`
+      }
+    case "string":
+      if (propertyKey !== String(Number(propertyKey))) {
+        if (ASCII_IDENTIFIER.test(propertyKey)) {
+          return objectName ? `${objectName}.${propertyKey}` : propertyKey;
+        }
+        return `${objectName}['${propertyKey.replace(/'/g, "\\'")}']`
+      }
+      // fall through
+    default:
+      // integer or string integer-index
+      return `${objectName}[${propertyKey}]`;
+  }
+}
+
+const SKIP_SYMBOL = Symbol("Skip");
+
+var TemporalHelpers = {
+  /*
+   * Codes and maximum lengths of months in the ISO 8601 calendar.
+   */
+  ISOMonths: [
+    { month: 1, monthCode: "M01", daysInMonth: 31 },
+    { month: 2, monthCode: "M02", daysInMonth: 29 },
+    { month: 3, monthCode: "M03", daysInMonth: 31 },
+    { month: 4, monthCode: "M04", daysInMonth: 30 },
+    { month: 5, monthCode: "M05", daysInMonth: 31 },
+    { month: 6, monthCode: "M06", daysInMonth: 30 },
+    { month: 7, monthCode: "M07", daysInMonth: 31 },
+    { month: 8, monthCode: "M08", daysInMonth: 31 },
+    { month: 9, monthCode: "M09", daysInMonth: 30 },
+    { month: 10, monthCode: "M10", daysInMonth: 31 },
+    { month: 11, monthCode: "M11", daysInMonth: 30 },
+    { month: 12, monthCode: "M12", daysInMonth: 31 }
+  ],
+
+  /*
+   * assertDuration(duration, years, ...,  nanoseconds[, description]):
+   *
+   * Shorthand for asserting that each field of a Temporal.Duration is equal to
+   * an expected value.
+   */
+  assertDuration(duration, years, months, weeks, days, hours, minutes, seconds, milliseconds, microseconds, nanoseconds, description = "") {
+    const prefix = description ? `${description}: ` : "";
+    assert(duration instanceof Temporal.Duration, `${prefix}instanceof`);
+    assert.sameValue(duration.years, years, `${prefix}years result:`);
+    assert.sameValue(duration.months, months, `${prefix}months result:`);
+    assert.sameValue(duration.weeks, weeks, `${prefix}weeks result:`);
+    assert.sameValue(duration.days, days, `${prefix}days result:`);
+    assert.sameValue(duration.hours, hours, `${prefix}hours result:`);
+    assert.sameValue(duration.minutes, minutes, `${prefix}minutes result:`);
+    assert.sameValue(duration.seconds, seconds, `${prefix}seconds result:`);
+    assert.sameValue(duration.milliseconds, milliseconds, `${prefix}milliseconds result:`);
+    assert.sameValue(duration.microseconds, microseconds, `${prefix}microseconds result:`);
+    assert.sameValue(duration.nanoseconds, nanoseconds, `${prefix}nanoseconds result`);
+  },
+
+  /*
+   * assertDateDuration(duration, years, months, weeks, days, [, description]):
+   *
+   * Shorthand for asserting that each date field of a Temporal.Duration is
+   * equal to an expected value.
+   */
+  assertDateDuration(duration, years, months, weeks, days, description = "") {
+    const prefix = description ? `${description}: ` : "";
+    assert(duration instanceof Temporal.Duration, `${prefix}instanceof`);
+    assert.sameValue(duration.years, years, `${prefix}years result:`);
+    assert.sameValue(duration.months, months, `${prefix}months result:`);
+    assert.sameValue(duration.weeks, weeks, `${prefix}weeks result:`);
+    assert.sameValue(duration.days, days, `${prefix}days result:`);
+    assert.sameValue(duration.hours, 0, `${prefix}hours result should be zero:`);
+    assert.sameValue(duration.minutes, 0, `${prefix}minutes result should be zero:`);
+    assert.sameValue(duration.seconds, 0, `${prefix}seconds result should be zero:`);
+    assert.sameValue(duration.milliseconds, 0, `${prefix}milliseconds result should be zero:`);
+    assert.sameValue(duration.microseconds, 0, `${prefix}microseconds result should be zero:`);
+    assert.sameValue(duration.nanoseconds, 0, `${prefix}nanoseconds result should be zero:`);
+  },
+
+  /*
+   * assertDurationsEqual(actual, expected[, description]):
+   *
+   * Shorthand for asserting that each field of a Temporal.Duration is equal to
+   * the corresponding field in another Temporal.Duration.
+   */
+  assertDurationsEqual(actual, expected, description = "") {
+    const prefix = description ? `${description}: ` : "";
+    assert(expected instanceof Temporal.Duration, `${prefix}expected value should be a Temporal.Duration`);
+    TemporalHelpers.assertDuration(actual, expected.years, expected.months, expected.weeks, expected.days, expected.hours, expected.minutes, expected.seconds, expected.milliseconds, expected.microseconds, expected.nanoseconds, description);
+  },
+
+  /*
+   * assertInstantsEqual(actual, expected[, description]):
+   *
+   * Shorthand for asserting that two Temporal.Instants are of the correct type
+   * and equal according to their equals() methods.
+   */
+  assertInstantsEqual(actual, expected, description = "") {
+    const prefix = description ? `${description}: ` : "";
+    assert(expected instanceof Temporal.Instant, `${prefix}expected value should be a Temporal.Instant`);
+    assert(actual instanceof Temporal.Instant, `${prefix}instanceof`);
+    assert(actual.equals(expected), `${prefix}equals method`);
+  },
+
+  /*
+   * assertPlainDate(date, year, ..., nanosecond[, description[, era, eraYear]]):
+   *
+   * Shorthand for asserting that each field of a Temporal.PlainDate is equal to
+   * an expected value. (Except the `calendar` property, since callers may want
+   * to assert either object equality with an object they put in there, or the
+   * value of date.calendarId.)
+   */
+  assertPlainDate(date, year, month, monthCode, day, description = "", era = undefined, eraYear = undefined) {
+    const prefix = description ? `${description}: ` : "";
+    assert(date instanceof Temporal.PlainDate, `${prefix}instanceof`);
+    assert.sameValue(date.era, era, `${prefix}era result:`);
+    assert.sameValue(date.eraYear, eraYear, `${prefix}eraYear result:`);
+    assert.sameValue(date.year, year, `${prefix}year result:`);
+    assert.sameValue(date.month, month, `${prefix}month result:`);
+    assert.sameValue(date.monthCode, monthCode, `${prefix}monthCode result:`);
+    assert.sameValue(date.day, day, `${prefix}day result:`);
+  },
+
+  /*
+   * assertPlainDateTime(datetime, year, ..., nanosecond[, description[, era, eraYear]]):
+   *
+   * Shorthand for asserting that each field of a Temporal.PlainDateTime is
+   * equal to an expected value. (Except the `calendar` property, since callers
+   * may want to assert either object equality with an object they put in there,
+   * or the value of datetime.calendarId.)
+   */
+  assertPlainDateTime(datetime, year, month, monthCode, day, hour, minute, second, millisecond, microsecond, nanosecond, description = "", era = undefined, eraYear = undefined) {
+    const prefix = description ? `${description}: ` : "";
+    assert(datetime instanceof Temporal.PlainDateTime, `${prefix}instanceof`);
+    assert.sameValue(datetime.era, era, `${prefix}era result:`);
+    assert.sameValue(datetime.eraYear, eraYear, `${prefix}eraYear result:`);
+    assert.sameValue(datetime.year, year, `${prefix}year result:`);
+    assert.sameValue(datetime.month, month, `${prefix}month result:`);
+    assert.sameValue(datetime.monthCode, monthCode, `${prefix}monthCode result:`);
+    assert.sameValue(datetime.day, day, `${prefix}day result:`);
+    assert.sameValue(datetime.hour, hour, `${prefix}hour result:`);
+    assert.sameValue(datetime.minute, minute, `${prefix}minute result:`);
+    assert.sameValue(datetime.second, second, `${prefix}second result:`);
+    assert.sameValue(datetime.millisecond, millisecond, `${prefix}millisecond result:`);
+    assert.sameValue(datetime.microsecond, microsecond, `${prefix}microsecond result:`);
+    assert.sameValue(datetime.nanosecond, nanosecond, `${prefix}nanosecond result:`);
+  },
+
+  /*
+   * assertPlainDateTimesEqual(actual, expected[, description]):
+   *
+   * Shorthand for asserting that two Temporal.PlainDateTimes are of the correct
+   * type, equal according to their equals() methods, and additionally that
+   * their calendar internal slots are the same value.
+   */
+  assertPlainDateTimesEqual(actual, expected, description = "") {
+    const prefix = description ? `${description}: ` : "";
+    assert(expected instanceof Temporal.PlainDateTime, `${prefix}expected value should be a Temporal.PlainDateTime`);
+    assert(actual instanceof Temporal.PlainDateTime, `${prefix}instanceof`);
+    assert(actual.equals(expected), `${prefix}equals method`);
+    assert.sameValue(
+      actual.getISOFields().calendar,
+      expected.getISOFields().calendar,
+      `${prefix}calendar same value:`
+    );
+  },
+
+  /*
+   * assertPlainMonthDay(monthDay, monthCode, day[, description [, referenceISOYear]]):
+   *
+   * Shorthand for asserting that each field of a Temporal.PlainMonthDay is
+   * equal to an expected value. (Except the `calendar` property, since callers
+   * may want to assert either object equality with an object they put in there,
+   * or the value of monthDay.calendarId().)
+   */
+  assertPlainMonthDay(monthDay, monthCode, day, description = "", referenceISOYear = 1972) {
+    const prefix = description ? `${description}: ` : "";
+    assert(monthDay instanceof Temporal.PlainMonthDay, `${prefix}instanceof`);
+    assert.sameValue(monthDay.monthCode, monthCode, `${prefix}monthCode result:`);
+    assert.sameValue(monthDay.day, day, `${prefix}day result:`);
+    assert.sameValue(monthDay.getISOFields().isoYear, referenceISOYear, `${prefix}referenceISOYear result:`);
+  },
+
+  /*
+   * assertPlainTime(time, hour, ..., nanosecond[, description]):
+   *
+   * Shorthand for asserting that each field of a Temporal.PlainTime is equal to
+   * an expected value.
+   */
+  assertPlainTime(time, hour, minute, second, millisecond, microsecond, nanosecond, description = "") {
+    const prefix = description ? `${description}: ` : "";
+    assert(time instanceof Temporal.PlainTime, `${prefix}instanceof`);
+    assert.sameValue(time.hour, hour, `${prefix}hour result:`);
+    assert.sameValue(time.minute, minute, `${prefix}minute result:`);
+    assert.sameValue(time.second, second, `${prefix}second result:`);
+    assert.sameValue(time.millisecond, millisecond, `${prefix}millisecond result:`);
+    assert.sameValue(time.microsecond, microsecond, `${prefix}microsecond result:`);
+    assert.sameValue(time.nanosecond, nanosecond, `${prefix}nanosecond result:`);
+  },
+
+  /*
+   * assertPlainTimesEqual(actual, expected[, description]):
+   *
+   * Shorthand for asserting that two Temporal.PlainTimes are of the correct
+   * type and equal according to their equals() methods.
+   */
+  assertPlainTimesEqual(actual, expected, description = "") {
+    const prefix = description ? `${description}: ` : "";
+    assert(expected instanceof Temporal.PlainTime, `${prefix}expected value should be a Temporal.PlainTime`);
+    assert(actual instanceof Temporal.PlainTime, `${prefix}instanceof`);
+    assert(actual.equals(expected), `${prefix}equals method`);
+  },
+
+  /*
+   * assertPlainYearMonth(yearMonth, year, month, monthCode[, description[, era, eraYear, referenceISODay]]):
+   *
+   * Shorthand for asserting that each field of a Temporal.PlainYearMonth is
+   * equal to an expected value. (Except the `calendar` property, since callers
+   * may want to assert either object equality with an object they put in there,
+   * or the value of yearMonth.calendarId.)
+   */
+  assertPlainYearMonth(yearMonth, year, month, monthCode, description = "", era = undefined, eraYear = undefined, referenceISODay = 1) {
+    const prefix = description ? `${description}: ` : "";
+    assert(yearMonth instanceof Temporal.PlainYearMonth, `${prefix}instanceof`);
+    assert.sameValue(yearMonth.era, era, `${prefix}era result:`);
+    assert.sameValue(yearMonth.eraYear, eraYear, `${prefix}eraYear result:`);
+    assert.sameValue(yearMonth.year, year, `${prefix}year result:`);
+    assert.sameValue(yearMonth.month, month, `${prefix}month result:`);
+    assert.sameValue(yearMonth.monthCode, monthCode, `${prefix}monthCode result:`);
+    assert.sameValue(yearMonth.getISOFields().isoDay, referenceISODay, `${prefix}referenceISODay result:`);
+  },
+
+  /*
+   * assertZonedDateTimesEqual(actual, expected[, description]):
+   *
+   * Shorthand for asserting that two Temporal.ZonedDateTimes are of the correct
+   * type, equal according to their equals() methods, and additionally that
+   * their time zones and calendar internal slots are the same value.
+   */
+  assertZonedDateTimesEqual(actual, expected, description = "") {
+    const prefix = description ? `${description}: ` : "";
+    assert(expected instanceof Temporal.ZonedDateTime, `${prefix}expected value should be a Temporal.ZonedDateTime`);
+    assert(actual instanceof Temporal.ZonedDateTime, `${prefix}instanceof`);
+    assert(actual.equals(expected), `${prefix}equals method`);
+    assert.sameValue(actual.timeZone, expected.timeZone, `${prefix}time zone same value:`);
+    assert.sameValue(
+      actual.getISOFields().calendar,
+      expected.getISOFields().calendar,
+      `${prefix}calendar same value:`
+    );
+  },
+
+  /*
+   * assertUnreachable(description):
+   *
+   * Helper for asserting that code is not executed. This is useful for
+   * assertions that methods of user calendars and time zones are not called.
+   */
+  assertUnreachable(description) {
+    let message = "This code should not be executed";
+    if (description) {
+      message = `${message}: ${description}`;
+    }
+    throw new Test262Error(message);
+  },
+
+  /*
+   * checkCalendarDateUntilLargestUnitSingular(func, expectedLargestUnitCalls):
+   *
+   * When an options object with a largestUnit property is synthesized inside
+   * Temporal and passed to user code such as calendar.dateUntil(), the value of
+   * the largestUnit property should be in the singular form, even if the input
+   * was given in the plural form.
+   * (This doesn't apply when the options object is passed through verbatim.)
+   *
+   * func(calendar, largestUnit, index) is the operation under test. It's called
+   * with an instance of a calendar that keeps track of which largestUnit is
+   * passed to dateUntil(), each key of expectedLargestUnitCalls in turn, and
+   * the key's numerical index in case the function needs to generate test data
+   * based on the index. At the end, the actual values passed to dateUntil() are
+   * compared with the array values of expectedLargestUnitCalls.
+   */
+  checkCalendarDateUntilLargestUnitSingular(func, expectedLargestUnitCalls) {
+    const actual = [];
+
+    class DateUntilOptionsCalendar extends Temporal.Calendar {
+      constructor() {
+        super("iso8601");
+      }
+
+      dateUntil(earlier, later, options) {
+        actual.push(options.largestUnit);
+        return super.dateUntil(earlier, later, options);
+      }
+
+      toString() {
+        return "date-until-options";
+      }
+    }
+
+    const calendar = new DateUntilOptionsCalendar();
+    Object.entries(expectedLargestUnitCalls).forEach(([largestUnit, expected], index) => {
+      func(calendar, largestUnit, index);
+      assert.compareArray(actual, expected, `largestUnit passed to calendar.dateUntil() for largestUnit ${largestUnit}`);
+      actual.splice(0); // empty it for the next check
+    });
+  },
+
+  /*
+   * checkPlainDateTimeConversionFastPath(func):
+   *
+   * ToTemporalDate and ToTemporalTime should both, if given a
+   * Temporal.PlainDateTime instance, convert to the desired type by reading the
+   * PlainDateTime's internal slots, rather than calling any getters.
+   *
+   * func(datetime, calendar) is the actual operation to test, that must
+   * internally call the abstract operation ToTemporalDate or ToTemporalTime.
+   * It is passed a Temporal.PlainDateTime instance, as well as the instance's
+   * calendar object (so that it doesn't have to call the calendar getter itself
+   * if it wants to make any assertions about the calendar.)
+   */
+  checkPlainDateTimeConversionFastPath(func, message = "checkPlainDateTimeConversionFastPath") {
+    const actual = [];
+    const expected = [];
+
+    const calendar = new Temporal.Calendar("iso8601");
+    const datetime = new Temporal.PlainDateTime(2000, 5, 2, 12, 34, 56, 987, 654, 321, calendar);
+    const prototypeDescrs = Object.getOwnPropertyDescriptors(Temporal.PlainDateTime.prototype);
+    ["year", "month", "monthCode", "day", "hour", "minute", "second", "millisecond", "microsecond", "nanosecond"].forEach((property) => {
+      Object.defineProperty(datetime, property, {
+        get() {
+          actual.push(`get ${formatPropertyName(property)}`);
+          const value = prototypeDescrs[property].get.call(this);
+          return {
+            toString() {
+              actual.push(`toString ${formatPropertyName(property)}`);
+              return value.toString();
+            },
+            valueOf() {
+              actual.push(`valueOf ${formatPropertyName(property)}`);
+              return value;
+            },
+          };
+        },
+      });
+    });
+    Object.defineProperty(datetime, "calendar", {
+      get() {
+        actual.push("get calendar");
+        return calendar;
+      },
+    });
+
+    func(datetime, calendar);
+    assert.compareArray(actual, expected, `${message}: property getters not called`);
+  },
+
+  /*
+   * Check that an options bag that accepts units written in the singular form,
+   * also accepts the same units written in the plural form.
+   * func(unit) should call the method with the appropriate options bag
+   * containing unit as a value. This will be called twice for each element of
+   * validSingularUnits, once with singular and once with plural, and the
+   * results of each pair should be the same (whether a Temporal object or a
+   * primitive value.)
+   */
+  checkPluralUnitsAccepted(func, validSingularUnits) {
+    const plurals = {
+      year: 'years',
+      month: 'months',
+      week: 'weeks',
+      day: 'days',
+      hour: 'hours',
+      minute: 'minutes',
+      second: 'seconds',
+      millisecond: 'milliseconds',
+      microsecond: 'microseconds',
+      nanosecond: 'nanoseconds',
+    };
+
+    validSingularUnits.forEach((unit) => {
+      const singularValue = func(unit);
+      const pluralValue = func(plurals[unit]);
+      const desc = `Plural ${plurals[unit]} produces the same result as singular ${unit}`;
+      if (singularValue instanceof Temporal.Duration) {
+        TemporalHelpers.assertDurationsEqual(pluralValue, singularValue, desc);
+      } else if (singularValue instanceof Temporal.Instant) {
+        TemporalHelpers.assertInstantsEqual(pluralValue, singularValue, desc);
+      } else if (singularValue instanceof Temporal.PlainDateTime) {
+        TemporalHelpers.assertPlainDateTimesEqual(pluralValue, singularValue, desc);
+      } else if (singularValue instanceof Temporal.PlainTime) {
+        TemporalHelpers.assertPlainTimesEqual(pluralValue, singularValue, desc);
+      } else if (singularValue instanceof Temporal.ZonedDateTime) {
+        TemporalHelpers.assertZonedDateTimesEqual(pluralValue, singularValue, desc);
+      } else {
+        assert.sameValue(pluralValue, singularValue);
+      }
+    });
+  },
+
+  /*
+   * checkRoundingIncrementOptionWrongType(checkFunc, assertTrueResultFunc, assertObjectResultFunc):
+   *
+   * Checks the type handling of the roundingIncrement option.
+   * checkFunc(roundingIncrement) is a function which takes the value of
+   * roundingIncrement to test, and calls the method under test with it,
+   * returning the result. assertTrueResultFunc(result, description) should
+   * assert that result is the expected result with roundingIncrement: true, and
+   * assertObjectResultFunc(result, description) should assert that result is
+   * the expected result with roundingIncrement being an object with a valueOf()
+   * method.
+   */
+  checkRoundingIncrementOptionWrongType(checkFunc, assertTrueResultFunc, assertObjectResultFunc) {
+    // null converts to 0, which is out of range
+    assert.throws(RangeError, () => checkFunc(null), "null");
+    // Booleans convert to either 0 or 1, and 1 is allowed
+    const trueResult = checkFunc(true);
+    assertTrueResultFunc(trueResult, "true");
+    assert.throws(RangeError, () => checkFunc(false), "false");
+    // Symbols and BigInts cannot convert to numbers
+    assert.throws(TypeError, () => checkFunc(Symbol()), "symbol");
+    assert.throws(TypeError, () => checkFunc(2n), "bigint");
+
+    // Objects prefer their valueOf() methods when converting to a number
+    assert.throws(RangeError, () => checkFunc({}), "plain object");
+
+    const expected = [
+      "get roundingIncrement.valueOf",
+      "call roundingIncrement.valueOf",
+    ];
+    const actual = [];
+    const observer = TemporalHelpers.toPrimitiveObserver(actual, 2, "roundingIncrement");
+    const objectResult = checkFunc(observer);
+    assertObjectResultFunc(objectResult, "object with valueOf");
+    assert.compareArray(actual, expected, "order of operations");
+  },
+
+  /*
+   * checkStringOptionWrongType(propertyName, value, checkFunc, assertFunc):
+   *
+   * Checks the type handling of a string option, of which there are several in
+   * Temporal.
+   * propertyName is the name of the option, and value is the value that
+   * assertFunc should expect it to have.
+   * checkFunc(value) is a function which takes the value of the option to test,
+   * and calls the method under test with it, returning the result.
+   * assertFunc(result, description) should assert that result is the expected
+   * result with the option value being an object with a toString() method
+   * which returns the given value.
+   */
+  checkStringOptionWrongType(propertyName, value, checkFunc, assertFunc) {
+    // null converts to the string "null", which is an invalid string value
+    assert.throws(RangeError, () => checkFunc(null), "null");
+    // Booleans convert to the strings "true" or "false", which are invalid
+    assert.throws(RangeError, () => checkFunc(true), "true");
+    assert.throws(RangeError, () => checkFunc(false), "false");
+    // Symbols cannot convert to strings
+    assert.throws(TypeError, () => checkFunc(Symbol()), "symbol");
+    // Numbers convert to strings which are invalid
+    assert.throws(RangeError, () => checkFunc(2), "number");
+    // BigInts convert to strings which are invalid
+    assert.throws(RangeError, () => checkFunc(2n), "bigint");
+
+    // Objects prefer their toString() methods when converting to a string
+    assert.throws(RangeError, () => checkFunc({}), "plain object");
+
+    const expected = [
+      `get ${propertyName}.toString`,
+      `call ${propertyName}.toString`,
+    ];
+    const actual = [];
+    const observer = TemporalHelpers.toPrimitiveObserver(actual, value, propertyName);
+    const result = checkFunc(observer);
+    assertFunc(result, "object with toString");
+    assert.compareArray(actual, expected, "order of operations");
+  },
+
+  /*
+   * checkSubclassingIgnored(construct, constructArgs, method, methodArgs,
+   *   resultAssertions):
+   *
+   * Methods of Temporal classes that return a new instance of the same class,
+   * must not take the constructor of a subclass into account, nor the @@species
+   * property. This helper runs tests to ensure this.
+   *
+   * construct(...constructArgs) must yield a valid instance of the Temporal
+   * class. instance[method](...methodArgs) is the method call under test, which
+   * must also yield a valid instance of the same Temporal class, not a
+   * subclass. See below for the individual tests that this runs.
+   * resultAssertions() is a function that performs additional assertions on the
+   * instance returned by the method under test.
+   */
+  checkSubclassingIgnored(...args) {
+    this.checkSubclassConstructorNotObject(...args);
+    this.checkSubclassConstructorUndefined(...args);
+    this.checkSubclassConstructorThrows(...args);
+    this.checkSubclassConstructorNotCalled(...args);
+    this.checkSubclassSpeciesInvalidResult(...args);
+    this.checkSubclassSpeciesNotAConstructor(...args);
+    this.checkSubclassSpeciesNull(...args);
+    this.checkSubclassSpeciesUndefined(...args);
+    this.checkSubclassSpeciesThrows(...args);
+  },
+
+  /*
+   * Checks that replacing the 'constructor' property of the instance with
+   * various primitive values does not affect the returned new instance.
+   */
+  checkSubclassConstructorNotObject(construct, constructArgs, method, methodArgs, resultAssertions) {
+    function check(value, description) {
+      const instance = new construct(...constructArgs);
+      instance.constructor = value;
+      const result = instance[method](...methodArgs);
+      assert.sameValue(Object.getPrototypeOf(result), construct.prototype, description);
+      resultAssertions(result);
+    }
+
+    check(null, "null");
+    check(true, "true");
+    check("test", "string");
+    check(Symbol(), "Symbol");
+    check(7, "number");
+    check(7n, "bigint");
+  },
+
+  /*
+   * Checks that replacing the 'constructor' property of the subclass with
+   * undefined does not affect the returned new instance.
+   */
+  checkSubclassConstructorUndefined(construct, constructArgs, method, methodArgs, resultAssertions) {
+    let called = 0;
+
+    class MySubclass extends construct {
+      constructor() {
+        ++called;
+        super(...constructArgs);
+      }
+    }
+
+    const instance = new MySubclass();
+    assert.sameValue(called, 1);
+
+    MySubclass.prototype.constructor = undefined;
+
+    const result = instance[method](...methodArgs);
+    assert.sameValue(called, 1);
+    assert.sameValue(Object.getPrototypeOf(result), construct.prototype);
+    resultAssertions(result);
+  },
+
+  /*
+   * Checks that making the 'constructor' property of the instance throw when
+   * called does not affect the returned new instance.
+   */
+  checkSubclassConstructorThrows(construct, constructArgs, method, methodArgs, resultAssertions) {
+    function CustomError() {}
+    const instance = new construct(...constructArgs);
+    Object.defineProperty(instance, "constructor", {
+      get() {
+        throw new CustomError();
+      }
+    });
+    const result = instance[method](...methodArgs);
+    assert.sameValue(Object.getPrototypeOf(result), construct.prototype);
+    resultAssertions(result);
+  },
+
+  /*
+   * Checks that when subclassing, the subclass constructor is not called by
+   * the method under test.
+   */
+  checkSubclassConstructorNotCalled(construct, constructArgs, method, methodArgs, resultAssertions) {
+    let called = 0;
+
+    class MySubclass extends construct {
+      constructor() {
+        ++called;
+        super(...constructArgs);
+      }
+    }
+
+    const instance = new MySubclass();
+    assert.sameValue(called, 1);
+
+    const result = instance[method](...methodArgs);
+    assert.sameValue(called, 1);
+    assert.sameValue(Object.getPrototypeOf(result), construct.prototype);
+    resultAssertions(result);
+  },
+
+  /*
+   * Check that the constructor's @@species property is ignored when it's a
+   * constructor that returns a non-object value.
+   */
+  checkSubclassSpeciesInvalidResult(construct, constructArgs, method, methodArgs, resultAssertions) {
+    function check(value, description) {
+      const instance = new construct(...constructArgs);
+      instance.constructor = {
+        [Symbol.species]: function() {
+          return value;
+        },
+      };
+      const result = instance[method](...methodArgs);
+      assert.sameValue(Object.getPrototypeOf(result), construct.prototype, description);
+      resultAssertions(result);
+    }
+
+    check(undefined, "undefined");
+    check(null, "null");
+    check(true, "true");
+    check("test", "string");
+    check(Symbol(), "Symbol");
+    check(7, "number");
+    check(7n, "bigint");
+    check({}, "plain object");
+  },
+
+  /*
+   * Check that the constructor's @@species property is ignored when it's not a
+   * constructor.
+   */
+  checkSubclassSpeciesNotAConstructor(construct, constructArgs, method, methodArgs, resultAssertions) {
+    function check(value, description) {
+      const instance = new construct(...constructArgs);
+      instance.constructor = {
+        [Symbol.species]: value,
+      };
+      const result = instance[method](...methodArgs);
+      assert.sameValue(Object.getPrototypeOf(result), construct.prototype, description);
+      resultAssertions(result);
+    }
+
+    check(true, "true");
+    check("test", "string");
+    check(Symbol(), "Symbol");
+    check(7, "number");
+    check(7n, "bigint");
+    check({}, "plain object");
+  },
+
+  /*
+   * Check that the constructor's @@species property is ignored when it's null.
+   */
+  checkSubclassSpeciesNull(construct, constructArgs, method, methodArgs, resultAssertions) {
+    let called = 0;
+
+    class MySubclass extends construct {
+      constructor() {
+        ++called;
+        super(...constructArgs);
+      }
+    }
+
+    const instance = new MySubclass();
+    assert.sameValue(called, 1);
+
+    MySubclass.prototype.constructor = {
+      [Symbol.species]: null,
+    };
+
+    const result = instance[method](...methodArgs);
+    assert.sameValue(called, 1);
+    assert.sameValue(Object.getPrototypeOf(result), construct.prototype);
+    resultAssertions(result);
+  },
+
+  /*
+   * Check that the constructor's @@species property is ignored when it's
+   * undefined.
+   */
+  checkSubclassSpeciesUndefined(construct, constructArgs, method, methodArgs, resultAssertions) {
+    let called = 0;
+
+    class MySubclass extends construct {
+      constructor() {
+        ++called;
+        super(...constructArgs);
+      }
+    }
+
+    const instance = new MySubclass();
+    assert.sameValue(called, 1);
+
+    MySubclass.prototype.constructor = {
+      [Symbol.species]: undefined,
+    };
+
+    const result = instance[method](...methodArgs);
+    assert.sameValue(called, 1);
+    assert.sameValue(Object.getPrototypeOf(result), construct.prototype);
+    resultAssertions(result);
+  },
+
+  /*
+   * Check that the constructor's @@species property is ignored when it throws,
+   * i.e. it is not called at all.
+   */
+  checkSubclassSpeciesThrows(construct, constructArgs, method, methodArgs, resultAssertions) {
+    function CustomError() {}
+
+    const instance = new construct(...constructArgs);
+    instance.constructor = {
+      get [Symbol.species]() {
+        throw new CustomError();
+      },
+    };
+
+    const result = instance[method](...methodArgs);
+    assert.sameValue(Object.getPrototypeOf(result), construct.prototype);
+  },
+
+  /*
+   * checkSubclassingIgnoredStatic(construct, method, methodArgs, resultAssertions):
+   *
+   * Static methods of Temporal classes that return a new instance of the class,
+   * must not use the this-value as a constructor. This helper runs tests to
+   * ensure this.
+   *
+   * construct[method](...methodArgs) is the static method call under test, and
+   * must yield a valid instance of the Temporal class, not a subclass. See
+   * below for the individual tests that this runs.
+   * resultAssertions() is a function that performs additional assertions on the
+   * instance returned by the method under test.
+   */
+  checkSubclassingIgnoredStatic(...args) {
+    this.checkStaticInvalidReceiver(...args);
+    this.checkStaticReceiverNotCalled(...args);
+    this.checkThisValueNotCalled(...args);
+  },
+
+  /*
+   * Check that calling the static method with a receiver that's not callable,
+   * still calls the intrinsic constructor.
+   */
+  checkStaticInvalidReceiver(construct, method, methodArgs, resultAssertions) {
+    function check(value, description) {
+      const result = construct[method].apply(value, methodArgs);
+      assert.sameValue(Object.getPrototypeOf(result), construct.prototype);
+      resultAssertions(result);
+    }
+
+    check(undefined, "undefined");
+    check(null, "null");
+    check(true, "true");
+    check("test", "string");
+    check(Symbol(), "symbol");
+    check(7, "number");
+    check(7n, "bigint");
+    check({}, "Non-callable object");
+  },
+
+  /*
+   * Check that calling the static method with a receiver that returns a value
+   * that's not callable, still calls the intrinsic constructor.
+   */
+  checkStaticReceiverNotCalled(construct, method, methodArgs, resultAssertions) {
+    function check(value, description) {
+      const receiver = function () {
+        return value;
+      };
+      const result = construct[method].apply(receiver, methodArgs);
+      assert.sameValue(Object.getPrototypeOf(result), construct.prototype);
+      resultAssertions(result);
+    }
+
+    check(undefined, "undefined");
+    check(null, "null");
+    check(true, "true");
+    check("test", "string");
+    check(Symbol(), "symbol");
+    check(7, "number");
+    check(7n, "bigint");
+    check({}, "Non-callable object");
+  },
+
+  /*
+   * Check that the receiver isn't called.
+   */
+  checkThisValueNotCalled(construct, method, methodArgs, resultAssertions) {
+    let called = false;
+
+    class MySubclass extends construct {
+      constructor(...args) {
+        called = true;
+        super(...args);
+      }
+    }
+
+    const result = MySubclass[method](...methodArgs);
+    assert.sameValue(called, false);
+    assert.sameValue(Object.getPrototypeOf(result), construct.prototype);
+    resultAssertions(result);
+  },
+
+  /*
+   * Check that any iterable returned from a custom time zone's
+   * getPossibleInstantsFor() method is exhausted.
+   * The custom time zone object is passed in to func().
+   * expected is an array of strings representing the expected calls to the
+   * getPossibleInstantsFor() method. The PlainDateTimes that it is called with,
+   * are compared (using their toString() results) with the array.
+   */
+  checkTimeZonePossibleInstantsIterable(func, expected) {
+    // A custom time zone that returns an iterable instead of an array from its
+    // getPossibleInstantsFor() method, and for testing purposes skips
+    // 00:00-01:00 UTC on January 1, 2030, and repeats 00:00-01:00 UTC+1 on
+    // January 3, 2030. Otherwise identical to the UTC time zone.
+    class TimeZonePossibleInstantsIterable extends Temporal.TimeZone {
+      constructor() {
+        super("UTC");
+        this.getPossibleInstantsForCallCount = 0;
+        this.getPossibleInstantsForCalledWith = [];
+        this.getPossibleInstantsForReturns = [];
+        this.iteratorExhausted = [];
+      }
+
+      toString() {
+        return "Custom/Iterable";
+      }
+
+      getOffsetNanosecondsFor(instant) {
+        if (Temporal.Instant.compare(instant, "2030-01-01T00:00Z") >= 0 &&
+          Temporal.Instant.compare(instant, "2030-01-03T01:00Z") < 0) {
+          return 3600_000_000_000;
+        } else {
+          return 0;
+        }
+      }
+
+      getPossibleInstantsFor(dateTime) {
+        this.getPossibleInstantsForCallCount++;
+        this.getPossibleInstantsForCalledWith.push(dateTime);
+
+        // Fake DST transition
+        let retval = super.getPossibleInstantsFor(dateTime);
+        if (dateTime.toPlainDate().equals("2030-01-01") && dateTime.hour === 0) {
+          retval = [];
+        } else if (dateTime.toPlainDate().equals("2030-01-03") && dateTime.hour === 0) {
+          retval.push(retval[0].subtract({ hours: 1 }));
+        } else if (dateTime.year === 2030 && dateTime.month === 1 && dateTime.day >= 1 && dateTime.day <= 2) {
+          retval[0] = retval[0].subtract({ hours: 1 });
+        }
+
+        this.getPossibleInstantsForReturns.push(retval);
+        this.iteratorExhausted.push(false);
+        return {
+          callIndex: this.getPossibleInstantsForCallCount - 1,
+          timeZone: this,
+          *[Symbol.iterator]() {
+            yield* this.timeZone.getPossibleInstantsForReturns[this.callIndex];
+            this.timeZone.iteratorExhausted[this.callIndex] = true;
+          },
+        };
+      }
+    }
+
+    const timeZone = new TimeZonePossibleInstantsIterable();
+    func(timeZone);
+
+    assert.sameValue(timeZone.getPossibleInstantsForCallCount, expected.length, "getPossibleInstantsFor() method called correct number of times");
+
+    for (let index = 0; index < expected.length; index++) {
+      assert.sameValue(timeZone.getPossibleInstantsForCalledWith[index].toString(), expected[index], "getPossibleInstantsFor() called with expected PlainDateTime");
+      assert(timeZone.iteratorExhausted[index], "iterated through the whole iterable");
+    }
+  },
+
+  /*
+   * Check that any calendar-carrying Temporal object has its [[Calendar]]
+   * internal slot read by ToTemporalCalendar, and does not fetch the calendar
+   * by calling getters.
+   * The custom calendar object is passed in to func() so that it can do its
+   * own additional assertions involving the calendar if necessary. (Sometimes
+   * there is nothing to assert as the calendar isn't stored anywhere that can
+   * be asserted about.)
+   */
+  checkToTemporalCalendarFastPath(func) {
+    class CalendarFastPathCheck extends Temporal.Calendar {
+      constructor() {
+        super("iso8601");
+      }
+
+      dateFromFields(...args) {
+        return super.dateFromFields(...args).withCalendar(this);
+      }
+
+      monthDayFromFields(...args) {
+        const { isoYear, isoMonth, isoDay } = super.monthDayFromFields(...args).getISOFields();
+        return new Temporal.PlainMonthDay(isoMonth, isoDay, this, isoYear);
+      }
+
+      yearMonthFromFields(...args) {
+        const { isoYear, isoMonth, isoDay } = super.yearMonthFromFields(...args).getISOFields();
+        return new Temporal.PlainYearMonth(isoYear, isoMonth, this, isoDay);
+      }
+
+      toString() {
+        return "fast-path-check";
+      }
+    }
+    const calendar = new CalendarFastPathCheck();
+
+    const plainDate = new Temporal.PlainDate(2000, 5, 2, calendar);
+    const plainDateTime = new Temporal.PlainDateTime(2000, 5, 2, 12, 34, 56, 987, 654, 321, calendar);
+    const plainMonthDay = new Temporal.PlainMonthDay(5, 2, calendar);
+    const plainYearMonth = new Temporal.PlainYearMonth(2000, 5, calendar);
+    const zonedDateTime = new Temporal.ZonedDateTime(1_000_000_000_000_000_000n, "UTC", calendar);
+
+    [plainDate, plainDateTime, plainMonthDay, plainYearMonth, zonedDateTime].forEach((temporalObject) => {
+      const actual = [];
+      const expected = [];
+
+      Object.defineProperty(temporalObject, "calendar", {
+        get() {
+          actual.push("get calendar");
+          return calendar;
+        },
+      });
+
+      func(temporalObject, calendar);
+      assert.compareArray(actual, expected, "calendar getter not called");
+    });
+  },
+
+  checkToTemporalInstantFastPath(func) {
+    const actual = [];
+    const expected = [];
+
+    const datetime = new Temporal.ZonedDateTime(1_000_000_000_987_654_321n, "UTC");
+    Object.defineProperty(datetime, 'toString', {
+      get() {
+        actual.push("get toString");
+        return function (options) {
+          actual.push("call toString");
+          return Temporal.ZonedDateTime.prototype.toString.call(this, options);
+        };
+      },
+    });
+
+    func(datetime);
+    assert.compareArray(actual, expected, "toString not called");
+  },
+
+  checkToTemporalPlainDateTimeFastPath(func) {
+    const actual = [];
+    const expected = [];
+
+    const calendar = new Temporal.Calendar("iso8601");
+    const date = new Temporal.PlainDate(2000, 5, 2, calendar);
+    const prototypeDescrs = Object.getOwnPropertyDescriptors(Temporal.PlainDate.prototype);
+    ["year", "month", "monthCode", "day"].forEach((property) => {
+      Object.defineProperty(date, property, {
+        get() {
+          actual.push(`get ${formatPropertyName(property)}`);
+          const value = prototypeDescrs[property].get.call(this);
+          return TemporalHelpers.toPrimitiveObserver(actual, value, property);
+        },
+      });
+    });
+    ["hour", "minute", "second", "millisecond", "microsecond", "nanosecond"].forEach((property) => {
+      Object.defineProperty(date, property, {
+        get() {
+          actual.push(`get ${formatPropertyName(property)}`);
+          return undefined;
+        },
+      });
+    });
+    Object.defineProperty(date, "calendar", {
+      get() {
+        actual.push("get calendar");
+        return calendar;
+      },
+    });
+
+    func(date, calendar);
+    assert.compareArray(actual, expected, "property getters not called");
+  },
+
+  /*
+   * A custom calendar used in prototype pollution checks. Verifies that the
+   * fromFields methods are always called with a null-prototype fields object.
+   */
+  calendarCheckFieldsPrototypePollution() {
+    class CalendarCheckFieldsPrototypePollution extends Temporal.Calendar {
+      constructor() {
+        super("iso8601");
+        this.dateFromFieldsCallCount = 0;
+        this.yearMonthFromFieldsCallCount = 0;
+        this.monthDayFromFieldsCallCount = 0;
+      }
+
+      // toString must remain "iso8601", so that some methods don't throw due to
+      // incompatible calendars
+
+      dateFromFields(fields, options = {}) {
+        this.dateFromFieldsCallCount++;
+        assert.sameValue(Object.getPrototypeOf(fields), null, "dateFromFields should be called with null-prototype fields object");
+        return super.dateFromFields(fields, options);
+      }
+
+      yearMonthFromFields(fields, options = {}) {
+        this.yearMonthFromFieldsCallCount++;
+        assert.sameValue(Object.getPrototypeOf(fields), null, "yearMonthFromFields should be called with null-prototype fields object");
+        return super.yearMonthFromFields(fields, options);
+      }
+
+      monthDayFromFields(fields, options = {}) {
+        this.monthDayFromFieldsCallCount++;
+        assert.sameValue(Object.getPrototypeOf(fields), null, "monthDayFromFields should be called with null-prototype fields object");
+        return super.monthDayFromFields(fields, options);
+      }
+    }
+
+    return new CalendarCheckFieldsPrototypePollution();
+  },
+
+  /*
+   * A custom calendar used in prototype pollution checks. Verifies that the
+   * mergeFields() method is always called with null-prototype fields objects.
+   */
+  calendarCheckMergeFieldsPrototypePollution() {
+    class CalendarCheckMergeFieldsPrototypePollution extends Temporal.Calendar {
+      constructor() {
+        super("iso8601");
+        this.mergeFieldsCallCount = 0;
+      }
+
+      toString() {
+        return "merge-fields-null-proto";
+      }
+
+      mergeFields(fields, additionalFields) {
+        this.mergeFieldsCallCount++;
+        assert.sameValue(Object.getPrototypeOf(fields), null, "mergeFields should be called with null-prototype fields object (first argument)");
+        assert.sameValue(Object.getPrototypeOf(additionalFields), null, "mergeFields should be called with null-prototype fields object (second argument)");
+        return super.mergeFields(fields, additionalFields);
+      }
+    }
+
+    return new CalendarCheckMergeFieldsPrototypePollution();
+  },
+
+  /*
+   * A custom calendar used in prototype pollution checks. Verifies that methods
+   * are always called with a null-prototype options object.
+   */
+  calendarCheckOptionsPrototypePollution() {
+    class CalendarCheckOptionsPrototypePollution extends Temporal.Calendar {
+      constructor() {
+        super("iso8601");
+        this.yearMonthFromFieldsCallCount = 0;
+        this.dateUntilCallCount = 0;
+      }
+
+      toString() {
+        return "options-null-proto";
+      }
+
+      yearMonthFromFields(fields, options) {
+        this.yearMonthFromFieldsCallCount++;
+        assert.sameValue(Object.getPrototypeOf(options), null, "yearMonthFromFields should be called with null-prototype options");
+        return super.yearMonthFromFields(fields, options);
+      }
+
+      dateUntil(one, two, options) {
+        this.dateUntilCallCount++;
+        assert.sameValue(Object.getPrototypeOf(options), null, "dateUntil should be called with null-prototype options");
+        return super.dateUntil(one, two, options);
+      }
+    }
+
+    return new CalendarCheckOptionsPrototypePollution();
+  },
+
+  /*
+   * A custom calendar that asserts its dateAdd() method is called with the
+   * options parameter having the value undefined.
+   */
+  calendarDateAddUndefinedOptions() {
+    class CalendarDateAddUndefinedOptions extends Temporal.Calendar {
+      constructor() {
+        super("iso8601");
+        this.dateAddCallCount = 0;
+      }
+
+      toString() {
+        return "dateadd-undef-options";
+      }
+
+      dateAdd(date, duration, options) {
+        this.dateAddCallCount++;
+        assert.sameValue(options, undefined, "dateAdd shouldn't be called with options");
+        return super.dateAdd(date, duration, options);
+      }
+    }
+    return new CalendarDateAddUndefinedOptions();
+  },
+
+  /*
+   * A custom calendar that asserts its dateAdd() method is called with a
+   * PlainDate instance. Optionally, it also asserts that the PlainDate instance
+   * is the specific object `this.specificPlainDate`, if it is set by the
+   * calling code.
+   */
+  calendarDateAddPlainDateInstance() {
+    class CalendarDateAddPlainDateInstance extends Temporal.Calendar {
+      constructor() {
+        super("iso8601");
+        this.dateAddCallCount = 0;
+        this.specificPlainDate = undefined;
+      }
+
+      toString() {
+        return "dateadd-plain-date-instance";
+      }
+
+      dateFromFields(...args) {
+        return super.dateFromFields(...args).withCalendar(this);
+      }
+
+      dateAdd(date, duration, options) {
+        this.dateAddCallCount++;
+        assert(date instanceof Temporal.PlainDate, "dateAdd() should be called with a PlainDate instance");
+        if (this.dateAddCallCount === 1 && this.specificPlainDate) {
+          assert.sameValue(date, this.specificPlainDate, `dateAdd() should be called first with the specific PlainDate instance ${this.specificPlainDate}`);
+        }
+        return super.dateAdd(date, duration, options).withCalendar(this);
+      }
+    }
+    return new CalendarDateAddPlainDateInstance();
+  },
+
+  /*
+   * A custom calendar that returns an iterable instead of an array from its
+   * fields() method, otherwise identical to the ISO calendar.
+   */
+  calendarFieldsIterable() {
+    class CalendarFieldsIterable extends Temporal.Calendar {
+      constructor() {
+        super("iso8601");
+        this.fieldsCallCount = 0;
+        this.fieldsCalledWith = [];
+        this.iteratorExhausted = [];
+      }
+
+      toString() {
+        return "fields-iterable";
+      }
+
+      fields(fieldNames) {
+        this.fieldsCallCount++;
+        this.fieldsCalledWith.push(fieldNames.slice());
+        this.iteratorExhausted.push(false);
+        return {
+          callIndex: this.fieldsCallCount - 1,
+          calendar: this,
+          *[Symbol.iterator]() {
+            yield* this.calendar.fieldsCalledWith[this.callIndex];
+            this.calendar.iteratorExhausted[this.callIndex] = true;
+          },
+        };
+      }
+    }
+    return new CalendarFieldsIterable();
+  },
+
+  /*
+   * A custom calendar that asserts its ...FromFields() methods are called with
+   * the options parameter having the value undefined.
+   */
+  calendarFromFieldsUndefinedOptions() {
+    class CalendarFromFieldsUndefinedOptions extends Temporal.Calendar {
+      constructor() {
+        super("iso8601");
+        this.dateFromFieldsCallCount = 0;
+        this.monthDayFromFieldsCallCount = 0;
+        this.yearMonthFromFieldsCallCount = 0;
+      }
+
+      toString() {
+        return "from-fields-undef-options";
+      }
+
+      dateFromFields(fields, options) {
+        this.dateFromFieldsCallCount++;
+        assert.sameValue(options, undefined, "dateFromFields shouldn't be called with options");
+        return super.dateFromFields(fields, options);
+      }
+
+      yearMonthFromFields(fields, options) {
+        this.yearMonthFromFieldsCallCount++;
+        assert.sameValue(options, undefined, "yearMonthFromFields shouldn't be called with options");
+        return super.yearMonthFromFields(fields, options);
+      }
+
+      monthDayFromFields(fields, options) {
+        this.monthDayFromFieldsCallCount++;
+        assert.sameValue(options, undefined, "monthDayFromFields shouldn't be called with options");
+        return super.monthDayFromFields(fields, options);
+      }
+    }
+    return new CalendarFromFieldsUndefinedOptions();
+  },
+
+  /*
+   * A custom calendar that modifies the fields object passed in to
+   * dateFromFields, sabotaging its time properties.
+   */
+  calendarMakeInfinityTime() {
+    class CalendarMakeInfinityTime extends Temporal.Calendar {
+      constructor() {
+        super("iso8601");
+      }
+
+      dateFromFields(fields, options) {
+        const retval = super.dateFromFields(fields, options);
+        fields.hour = Infinity;
+        fields.minute = Infinity;
+        fields.second = Infinity;
+        fields.millisecond = Infinity;
+        fields.microsecond = Infinity;
+        fields.nanosecond = Infinity;
+        return retval;
+      }
+    }
+    return new CalendarMakeInfinityTime();
+  },
+
+  /*
+   * A custom calendar that defines getters on the fields object passed into
+   * dateFromFields that throw, sabotaging its time properties.
+   */
+  calendarMakeInvalidGettersTime() {
+    class CalendarMakeInvalidGettersTime extends Temporal.Calendar {
+      constructor() {
+        super("iso8601");
+      }
+
+      dateFromFields(fields, options) {
+        const retval = super.dateFromFields(fields, options);
+        const throwingDescriptor = {
+          get() {
+            throw new Test262Error("reading a sabotaged time field");
+          },
+        };
+        Object.defineProperties(fields, {
+          hour: throwingDescriptor,
+          minute: throwingDescriptor,
+          second: throwingDescriptor,
+          millisecond: throwingDescriptor,
+          microsecond: throwingDescriptor,
+          nanosecond: throwingDescriptor,
+        });
+        return retval;
+      }
+    }
+    return new CalendarMakeInvalidGettersTime();
+  },
+
+  /*
+   * A custom calendar whose mergeFields() method returns a proxy object with
+   * all of its Get and HasProperty operations observable, as well as adding a
+   * "shouldNotBeCopied": true property.
+   */
+  calendarMergeFieldsGetters() {
+    class CalendarMergeFieldsGetters extends Temporal.Calendar {
+      constructor() {
+        super("iso8601");
+        this.mergeFieldsReturnOperations = [];
+      }
+
+      toString() {
+        return "merge-fields-getters";
+      }
+
+      dateFromFields(fields, options) {
+        assert.sameValue(fields.shouldNotBeCopied, undefined, "extra fields should not be copied");
+        return super.dateFromFields(fields, options);
+      }
+
+      yearMonthFromFields(fields, options) {
+        assert.sameValue(fields.shouldNotBeCopied, undefined, "extra fields should not be copied");
+        return super.yearMonthFromFields(fields, options);
+      }
+
+      monthDayFromFields(fields, options) {
+        assert.sameValue(fields.shouldNotBeCopied, undefined, "extra fields should not be copied");
+        return super.monthDayFromFields(fields, options);
+      }
+
+      mergeFields(fields, additionalFields) {
+        const retval = super.mergeFields(fields, additionalFields);
+        retval._calendar = this;
+        retval.shouldNotBeCopied = true;
+        return new Proxy(retval, {
+          get(target, key) {
+            target._calendar.mergeFieldsReturnOperations.push(`get ${key}`);
+            const result = target[key];
+            if (result === undefined) {
+              return undefined;
+            }
+            return TemporalHelpers.toPrimitiveObserver(target._calendar.mergeFieldsReturnOperations, result, key);
+          },
+          has(target, key) {
+            target._calendar.mergeFieldsReturnOperations.push(`has ${key}`);
+            return key in target;
+          },
+        });
+      }
+    }
+    return new CalendarMergeFieldsGetters();
+  },
+
+  /*
+   * A custom calendar whose mergeFields() method returns a primitive value,
+   * given by @primitive, and which records the number of calls made to its
+   * dateFromFields(), yearMonthFromFields(), and monthDayFromFields() methods.
+   */
+  calendarMergeFieldsReturnsPrimitive(primitive) {
+    class CalendarMergeFieldsPrimitive extends Temporal.Calendar {
+      constructor(mergeFieldsReturnValue) {
+        super("iso8601");
+        this._mergeFieldsReturnValue = mergeFieldsReturnValue;
+        this.dateFromFieldsCallCount = 0;
+        this.monthDayFromFieldsCallCount = 0;
+        this.yearMonthFromFieldsCallCount = 0;
+      }
+
+      toString() {
+        return "merge-fields-primitive";
+      }
+
+      dateFromFields(fields, options) {
+        this.dateFromFieldsCallCount++;
+        return super.dateFromFields(fields, options);
+      }
+
+      yearMonthFromFields(fields, options) {
+        this.yearMonthFromFieldsCallCount++;
+        return super.yearMonthFromFields(fields, options);
+      }
+
+      monthDayFromFields(fields, options) {
+        this.monthDayFromFieldsCallCount++;
+        return super.monthDayFromFields(fields, options);
+      }
+
+      mergeFields() {
+        return this._mergeFieldsReturnValue;
+      }
+    }
+    return new CalendarMergeFieldsPrimitive(primitive);
+  },
+
+  /*
+   * A custom calendar whose fields() method returns the same value as the
+   * iso8601 calendar, with the addition of extraFields provided as parameter.
+   */
+  calendarWithExtraFields(fields) {
+    class CalendarWithExtraFields extends Temporal.Calendar {
+      constructor(extraFields) {
+        super("iso8601");
+        this._extraFields = extraFields;
+      }
+
+      fields(fieldNames) {
+        return super.fields(fieldNames).concat(this._extraFields);
+      }
+    }
+
+    return new CalendarWithExtraFields(fields);
+  },
+
+  /*
+   * crossDateLineTimeZone():
+   *
+   * This returns an instance of a custom time zone class that implements one
+   * single transition where the time zone moves from one side of the
+   * International Date Line to the other, for the purpose of testing time zone
+   * calculations without depending on system time zone data.
+   *
+   * The transition occurs at epoch second 1325239200 and goes from offset
+   * -10:00 to +14:00. In other words, the time zone skips the whole calendar
+   * day of 2011-12-30. This is the same as the real-life transition in the
+   * Pacific/Apia time zone.
+   */
+  crossDateLineTimeZone() {
+    const { compare } = Temporal.PlainDate;
+    const skippedDay = new Temporal.PlainDate(2011, 12, 30);
+    const transitionEpoch = 1325239200_000_000_000n;
+    const beforeOffset = new Temporal.TimeZone("-10:00");
+    const afterOffset = new Temporal.TimeZone("+14:00");
+
+    class CrossDateLineTimeZone extends Temporal.TimeZone {
+      constructor() {
+        super("+14:00");
+      }
+
+      getOffsetNanosecondsFor(instant) {
+        if (instant.epochNanoseconds < transitionEpoch) {
+          return beforeOffset.getOffsetNanosecondsFor(instant);
+        }
+        return afterOffset.getOffsetNanosecondsFor(instant);
+      }
+
+      getPossibleInstantsFor(datetime) {
+        const comparison = compare(datetime.toPlainDate(), skippedDay);
+        if (comparison === 0) {
+          return [];
+        }
+        if (comparison < 0) {
+          return [beforeOffset.getInstantFor(datetime)];
+        }
+        return [afterOffset.getInstantFor(datetime)];
+      }
+
+      getPreviousTransition(instant) {
+        if (instant.epochNanoseconds > transitionEpoch) return new Temporal.Instant(transitionEpoch);
+        return null;
+      }
+
+      getNextTransition(instant) {
+        if (instant.epochNanoseconds < transitionEpoch) return new Temporal.Instant(transitionEpoch);
+        return null;
+      }
+
+      toString() {
+        return "Custom/Date_Line";
+      }
+    }
+    return new CrossDateLineTimeZone();
+  },
+
+  /*
+   * observeProperty(calls, object, propertyName, value):
+   *
+   * Defines an own property @object.@propertyName with value @value, that
+   * will log any calls to its accessors to the array @calls.
+   */
+  observeProperty(calls, object, propertyName, value, objectName = "") {
+    Object.defineProperty(object, propertyName, {
+      get() {
+        calls.push(`get ${formatPropertyName(propertyName, objectName)}`);
+        return value;
+      },
+      set(v) {
+        calls.push(`set ${formatPropertyName(propertyName, objectName)}`);
+      }
+    });
+  },
+
+  /*
+   * observeMethod(calls, object, propertyName, value):
+   *
+   * Defines an own property @object.@propertyName with value @value, that
+   * will log any calls of @value to the array @calls.
+   */
+  observeMethod(calls, object, propertyName, objectName = "") {
+    const method = object[propertyName];
+    object[propertyName] = function () {
+      calls.push(`call ${formatPropertyName(propertyName, objectName)}`);
+      return method.apply(object, arguments);
+    };
+  },
+
+  /*
+   * Used for substituteMethod to indicate default behavior instead of a
+   * substituted value
+   */
+  SUBSTITUTE_SKIP: SKIP_SYMBOL,
+
+  /*
+   * substituteMethod(object, propertyName, values):
+   *
+   * Defines an own property @object.@propertyName that will, for each
+   * subsequent call to the method previously defined as
+   * @object.@propertyName:
+   *  - Call the method, if no more values remain
+   *  - Call the method, if the value in @values for the corresponding call
+   *    is SUBSTITUTE_SKIP
+   *  - Otherwise, return the corresponding value in @value
+   */
+  substituteMethod(object, propertyName, values) {
+    let calls = 0;
+    const method = object[propertyName];
+    object[propertyName] = function () {
+      if (calls >= values.length) {
+        return method.apply(object, arguments);
+      } else if (values[calls] === SKIP_SYMBOL) {
+        calls++;
+        return method.apply(object, arguments);
+      } else {
+        return values[calls++];
+      }
+    };
+  },
+
+  /*
+   * calendarObserver:
+   * A custom calendar that behaves exactly like the ISO 8601 calendar but
+   * tracks calls to any of its methods, and Get/Has operations on its
+   * properties, by appending messages to an array. This is for the purpose of
+   * testing order of operations that are observable from user code.
+   * objectName is used in the log.
+   */
+  calendarObserver(calls, objectName, methodOverrides = {}) {
+    function removeExtraHasPropertyChecks(objectName, calls) {
+      // Inserting the tracking calendar into the return values of methods
+      // that we chain up into the ISO calendar for, causes extra HasProperty
+      // checks, which we observe. This removes them so that we don't leak
+      // implementation details of the helper into the test code.
+      assert.sameValue(calls.pop(), `has ${objectName}.yearOfWeek`);
+      assert.sameValue(calls.pop(), `has ${objectName}.yearMonthFromFields`);
+      assert.sameValue(calls.pop(), `has ${objectName}.year`);
+      assert.sameValue(calls.pop(), `has ${objectName}.weekOfYear`);
+      assert.sameValue(calls.pop(), `has ${objectName}.monthsInYear`);
+      assert.sameValue(calls.pop(), `has ${objectName}.monthDayFromFields`);
+      assert.sameValue(calls.pop(), `has ${objectName}.monthCode`);
+      assert.sameValue(calls.pop(), `has ${objectName}.month`);
+      assert.sameValue(calls.pop(), `has ${objectName}.mergeFields`);
+      assert.sameValue(calls.pop(), `has ${objectName}.inLeapYear`);
+      assert.sameValue(calls.pop(), `has ${objectName}.id`);
+      assert.sameValue(calls.pop(), `has ${objectName}.fields`);
+      assert.sameValue(calls.pop(), `has ${objectName}.daysInYear`);
+      assert.sameValue(calls.pop(), `has ${objectName}.daysInWeek`);
+      assert.sameValue(calls.pop(), `has ${objectName}.daysInMonth`);
+      assert.sameValue(calls.pop(), `has ${objectName}.dayOfYear`);
+      assert.sameValue(calls.pop(), `has ${objectName}.dayOfWeek`);
+      assert.sameValue(calls.pop(), `has ${objectName}.day`);
+      assert.sameValue(calls.pop(), `has ${objectName}.dateUntil`);
+      assert.sameValue(calls.pop(), `has ${objectName}.dateFromFields`);
+      assert.sameValue(calls.pop(), `has ${objectName}.dateAdd`);
+    }
+
+    const iso8601 = new Temporal.Calendar("iso8601");
+    const trackingMethods = {
+      dateFromFields(...args) {
+        calls.push(`call ${objectName}.dateFromFields`);
+        if ('dateFromFields' in methodOverrides) {
+          const value = methodOverrides.dateFromFields;
+          return typeof value === "function" ? value(...args) : value;
+        }
+        const originalResult = iso8601.dateFromFields(...args);
+        // Replace the calendar in the result with the call-tracking calendar
+        const {isoYear, isoMonth, isoDay} = originalResult.getISOFields();
+        const result = new Temporal.PlainDate(isoYear, isoMonth, isoDay, this);
+        removeExtraHasPropertyChecks(objectName, calls);
+        return result;
+      },
+      yearMonthFromFields(...args) {
+        calls.push(`call ${objectName}.yearMonthFromFields`);
+        if ('yearMonthFromFields' in methodOverrides) {
+          const value = methodOverrides.yearMonthFromFields;
+          return typeof value === "function" ? value(...args) : value;
+        }
+        const originalResult = iso8601.yearMonthFromFields(...args);
+        // Replace the calendar in the result with the call-tracking calendar
+        const {isoYear, isoMonth, isoDay} = originalResult.getISOFields();
+        const result = new Temporal.PlainYearMonth(isoYear, isoMonth, this, isoDay);
+        removeExtraHasPropertyChecks(objectName, calls);
+        return result;
+      },
+      monthDayFromFields(...args) {
+        calls.push(`call ${objectName}.monthDayFromFields`);
+        if ('monthDayFromFields' in methodOverrides) {
+          const value = methodOverrides.monthDayFromFields;
+          return typeof value === "function" ? value(...args) : value;
+        }
+        const originalResult = iso8601.monthDayFromFields(...args);
+        // Replace the calendar in the result with the call-tracking calendar
+        const {isoYear, isoMonth, isoDay} = originalResult.getISOFields();
+        const result = new Temporal.PlainMonthDay(isoMonth, isoDay, this, isoYear);
+        removeExtraHasPropertyChecks(objectName, calls);
+        return result;
+      },
+      dateAdd(...args) {
+        calls.push(`call ${objectName}.dateAdd`);
+        if ('dateAdd' in methodOverrides) {
+          const value = methodOverrides.dateAdd;
+          return typeof value === "function" ? value(...args) : value;
+        }
+        const originalResult = iso8601.dateAdd(...args);
+        const {isoYear, isoMonth, isoDay} = originalResult.getISOFields();
+        const result = new Temporal.PlainDate(isoYear, isoMonth, isoDay, this);
+        removeExtraHasPropertyChecks(objectName, calls);
+        return result;
+      },
+      id: "iso8601",
+    };
+    // Automatically generate the other methods that don't need any custom code
+    [
+      "dateUntil",
+      "day",
+      "dayOfWeek",
+      "dayOfYear",
+      "daysInMonth",
+      "daysInWeek",
+      "daysInYear",
+      "era",
+      "eraYear",
+      "fields",
+      "inLeapYear",
+      "mergeFields",
+      "month",
+      "monthCode",
+      "monthsInYear",
+      "toString",
+      "weekOfYear",
+      "year",
+      "yearOfWeek",
+    ].forEach((methodName) => {
+      trackingMethods[methodName] = function (...args) {
+        calls.push(`call ${formatPropertyName(methodName, objectName)}`);
+        if (methodName in methodOverrides) {
+          const value = methodOverrides[methodName];
+          return typeof value === "function" ? value(...args) : value;
+        }
+        return iso8601[methodName](...args);
+      };
+    });
+    return new Proxy(trackingMethods, {
+      get(target, key, receiver) {
+        const result = Reflect.get(target, key, receiver);
+        calls.push(`get ${formatPropertyName(key, objectName)}`);
+        return result;
+      },
+      has(target, key) {
+        calls.push(`has ${formatPropertyName(key, objectName)}`);
+        return Reflect.has(target, key);
+      },
+    });
+  },
+
+  /*
+   * A custom calendar that does not allow any of its methods to be called, for
+   * the purpose of asserting that a particular operation does not call into
+   * user code.
+   */
+  calendarThrowEverything() {
+    class CalendarThrowEverything extends Temporal.Calendar {
+      constructor() {
+        super("iso8601");
+      }
+      toString() {
+        TemporalHelpers.assertUnreachable("toString should not be called");
+      }
+      dateFromFields() {
+        TemporalHelpers.assertUnreachable("dateFromFields should not be called");
+      }
+      yearMonthFromFields() {
+        TemporalHelpers.assertUnreachable("yearMonthFromFields should not be called");
+      }
+      monthDayFromFields() {
+        TemporalHelpers.assertUnreachable("monthDayFromFields should not be called");
+      }
+      dateAdd() {
+        TemporalHelpers.assertUnreachable("dateAdd should not be called");
+      }
+      dateUntil() {
+        TemporalHelpers.assertUnreachable("dateUntil should not be called");
+      }
+      era() {
+        TemporalHelpers.assertUnreachable("era should not be called");
+      }
+      eraYear() {
+        TemporalHelpers.assertUnreachable("eraYear should not be called");
+      }
+      year() {
+        TemporalHelpers.assertUnreachable("year should not be called");
+      }
+      month() {
+        TemporalHelpers.assertUnreachable("month should not be called");
+      }
+      monthCode() {
+        TemporalHelpers.assertUnreachable("monthCode should not be called");
+      }
+      day() {
+        TemporalHelpers.assertUnreachable("day should not be called");
+      }
+      fields() {
+        TemporalHelpers.assertUnreachable("fields should not be called");
+      }
+      mergeFields() {
+        TemporalHelpers.assertUnreachable("mergeFields should not be called");
+      }
+    }
+
+    return new CalendarThrowEverything();
+  },
+
+  /*
+   * oneShiftTimeZone(shiftInstant, shiftNanoseconds):
+   *
+   * In the case of a spring-forward time zone offset transition (skipped time),
+   * and disambiguation === 'earlier', BuiltinTimeZoneGetInstantFor subtracts a
+   * negative number of nanoseconds from a PlainDateTime, which should balance
+   * with the microseconds field.
+   *
+   * This returns an instance of a custom time zone class which skips a length
+   * of time equal to shiftNanoseconds (a number), at the Temporal.Instant
+   * shiftInstant. Before shiftInstant, it's identical to UTC, and after
+   * shiftInstant it's a constant-offset time zone.
+   *
+   * It provides a getPossibleInstantsForCalledWith member which is an array
+   * with the result of calling toString() on any PlainDateTimes passed to
+   * getPossibleInstantsFor().
+   */
+  oneShiftTimeZone(shiftInstant, shiftNanoseconds) {
+    class OneShiftTimeZone extends Temporal.TimeZone {
+      constructor(shiftInstant, shiftNanoseconds) {
+        super("+00:00");
+        this._shiftInstant = shiftInstant;
+        this._epoch1 = shiftInstant.epochNanoseconds;
+        this._epoch2 = this._epoch1 + BigInt(shiftNanoseconds);
+        this._shiftNanoseconds = shiftNanoseconds;
+        this._shift = new Temporal.Duration(0, 0, 0, 0, 0, 0, 0, 0, 0, this._shiftNanoseconds);
+        this.getPossibleInstantsForCalledWith = [];
+      }
+
+      _isBeforeShift(instant) {
+        return instant.epochNanoseconds < this._epoch1;
+      }
+
+      getOffsetNanosecondsFor(instant) {
+        return this._isBeforeShift(instant) ? 0 : this._shiftNanoseconds;
+      }
+
+      getPossibleInstantsFor(plainDateTime) {
+        this.getPossibleInstantsForCalledWith.push(plainDateTime.toString({ calendarName: "never" }));
+        const [instant] = super.getPossibleInstantsFor(plainDateTime);
+        if (this._shiftNanoseconds > 0) {
+          if (this._isBeforeShift(instant)) return [instant];
+          if (instant.epochNanoseconds < this._epoch2) return [];
+          return [instant.subtract(this._shift)];
+        }
+        if (instant.epochNanoseconds < this._epoch2) return [instant];
+        const shifted = instant.subtract(this._shift);
+        if (this._isBeforeShift(instant)) return [instant, shifted];
+        return [shifted];
+      }
+
+      getNextTransition(instant) {
+        return this._isBeforeShift(instant) ? this._shiftInstant : null;
+      }
+
+      getPreviousTransition(instant) {
+        return this._isBeforeShift(instant) ? null : this._shiftInstant;
+      }
+
+      toString() {
+        return "Custom/One_Shift";
+      }
+    }
+    return new OneShiftTimeZone(shiftInstant, shiftNanoseconds);
+  },
+
+  /*
+   * propertyBagObserver():
+   * Returns an object that behaves like the given propertyBag but tracks Get
+   * and Has operations on any of its properties, by appending messages to an
+   * array. If the value of a property in propertyBag is a primitive, the value
+   * of the returned object's property will additionally be a
+   * TemporalHelpers.toPrimitiveObserver that will track calls to its toString
+   * and valueOf methods in the same array. This is for the purpose of testing
+   * order of operations that are observable from user code. objectName is used
+   * in the log.
+   */
+  propertyBagObserver(calls, propertyBag, objectName) {
+    return new Proxy(propertyBag, {
+      ownKeys(target) {
+        calls.push(`ownKeys ${objectName}`);
+        return Reflect.ownKeys(target);
+      },
+      getOwnPropertyDescriptor(target, key) {
+        calls.push(`getOwnPropertyDescriptor ${formatPropertyName(key, objectName)}`);
+        return Reflect.getOwnPropertyDescriptor(target, key);
+      },
+      get(target, key, receiver) {
+        calls.push(`get ${formatPropertyName(key, objectName)}`);
+        const result = Reflect.get(target, key, receiver);
+        if (result === undefined) {
+          return undefined;
+        }
+        if ((result !== null && typeof result === "object") || typeof result === "function") {
+          return result;
+        }
+        return TemporalHelpers.toPrimitiveObserver(calls, result, `${formatPropertyName(key, objectName)}`);
+      },
+      has(target, key) {
+        calls.push(`has ${formatPropertyName(key, objectName)}`);
+        return Reflect.has(target, key);
+      },
+    });
+  },
+
+  /*
+   * specificOffsetTimeZone():
+   *
+   * This returns an instance of a custom time zone class, which returns a
+   * specific custom value from its getOffsetNanosecondsFrom() method. This is
+   * for the purpose of testing the validation of what this method returns.
+   *
+   * It also returns an empty array from getPossibleInstantsFor(), so as to
+   * trigger calls to getOffsetNanosecondsFor() when used from the
+   * BuiltinTimeZoneGetInstantFor operation.
+   */
+  specificOffsetTimeZone(offsetValue) {
+    class SpecificOffsetTimeZone extends Temporal.TimeZone {
+      constructor(offsetValue) {
+        super("UTC");
+        this._offsetValue = offsetValue;
+      }
+
+      getOffsetNanosecondsFor() {
+        return this._offsetValue;
+      }
+
+      getPossibleInstantsFor(dt) {
+        if (typeof this._offsetValue !== 'number' || Math.abs(this._offsetValue) >= 86400e9 || isNaN(this._offsetValue)) return [];
+        const zdt = dt.toZonedDateTime("UTC").add({ nanoseconds: -this._offsetValue });
+        return [zdt.toInstant()];
+      }
+
+      get id() {
+        return this.getOffsetStringFor(new Temporal.Instant(0n));
+      }
+    }
+    return new SpecificOffsetTimeZone(offsetValue);
+  },
+
+  /*
+   * springForwardFallBackTimeZone():
+   *
+   * This returns an instance of a custom time zone class that implements one
+   * single spring-forward/fall-back transition, for the purpose of testing the
+   * disambiguation option, without depending on system time zone data.
+   *
+   * The spring-forward occurs at epoch second 954669600 (2000-04-02T02:00
+   * local) and goes from offset -08:00 to -07:00.
+   *
+   * The fall-back occurs at epoch second 972810000 (2000-10-29T02:00 local) and
+   * goes from offset -07:00 to -08:00.
+   */
+  springForwardFallBackTimeZone() {
+    const { compare } = Temporal.PlainDateTime;
+    const springForwardLocal = new Temporal.PlainDateTime(2000, 4, 2, 2);
+    const springForwardEpoch = 954669600_000_000_000n;
+    const fallBackLocal = new Temporal.PlainDateTime(2000, 10, 29, 1);
+    const fallBackEpoch = 972810000_000_000_000n;
+    const winterOffset = new Temporal.TimeZone('-08:00');
+    const summerOffset = new Temporal.TimeZone('-07:00');
+
+    class SpringForwardFallBackTimeZone extends Temporal.TimeZone {
+      constructor() {
+        super("-08:00");
+      }
+
+      getOffsetNanosecondsFor(instant) {
+        if (instant.epochNanoseconds < springForwardEpoch ||
+          instant.epochNanoseconds >= fallBackEpoch) {
+          return winterOffset.getOffsetNanosecondsFor(instant);
+        }
+        return summerOffset.getOffsetNanosecondsFor(instant);
+      }
+
+      getPossibleInstantsFor(datetime) {
+        if (compare(datetime, springForwardLocal) >= 0 && compare(datetime, springForwardLocal.add({ hours: 1 })) < 0) {
+          return [];
+        }
+        if (compare(datetime, fallBackLocal) >= 0 && compare(datetime, fallBackLocal.add({ hours: 1 })) < 0) {
+          return [summerOffset.getInstantFor(datetime), winterOffset.getInstantFor(datetime)];
+        }
+        if (compare(datetime, springForwardLocal) < 0 || compare(datetime, fallBackLocal) >= 0) {
+          return [winterOffset.getInstantFor(datetime)];
+        }
+        return [summerOffset.getInstantFor(datetime)];
+      }
+
+      getPreviousTransition(instant) {
+        if (instant.epochNanoseconds > fallBackEpoch) return new Temporal.Instant(fallBackEpoch);
+        if (instant.epochNanoseconds > springForwardEpoch) return new Temporal.Instant(springForwardEpoch);
+        return null;
+      }
+
+      getNextTransition(instant) {
+        if (instant.epochNanoseconds < springForwardEpoch) return new Temporal.Instant(springForwardEpoch);
+        if (instant.epochNanoseconds < fallBackEpoch) return new Temporal.Instant(fallBackEpoch);
+        return null;
+      }
+
+      get id() {
+        return "Custom/Spring_Fall";
+      }
+
+      toString() {
+        return "Custom/Spring_Fall";
+      }
+    }
+    return new SpringForwardFallBackTimeZone();
+  },
+
+  /*
+   * timeZoneObserver:
+   * A custom calendar that behaves exactly like the UTC time zone but tracks
+   * calls to any of its methods, and Get/Has operations on its properties, by
+   * appending messages to an array. This is for the purpose of testing order of
+   * operations that are observable from user code. objectName is used in the
+   * log. methodOverrides is an optional object containing properties with the
+   * same name as Temporal.TimeZone methods. If the property value is a function
+   * it will be called with the proper arguments instead of the UTC method.
+   * Otherwise, the property value will be returned directly.
+   */
+  timeZoneObserver(calls, objectName, methodOverrides = {}) {
+    const utc = new Temporal.TimeZone("UTC");
+    const trackingMethods = {
+      id: "UTC",
+    };
+    // Automatically generate the methods
+    ["getOffsetNanosecondsFor", "getPossibleInstantsFor", "toString"].forEach((methodName) => {
+      trackingMethods[methodName] = function (...args) {
+        calls.push(`call ${formatPropertyName(methodName, objectName)}`);
+        if (methodName in methodOverrides) {
+          const value = methodOverrides[methodName];
+          return typeof value === "function" ? value(...args) : value;
+        }
+        return utc[methodName](...args);
+      };
+    });
+    return new Proxy(trackingMethods, {
+      get(target, key, receiver) {
+        const result = Reflect.get(target, key, receiver);
+        calls.push(`get ${formatPropertyName(key, objectName)}`);
+        return result;
+      },
+      has(target, key) {
+        calls.push(`has ${formatPropertyName(key, objectName)}`);
+        return Reflect.has(target, key);
+      },
+    });
+  },
+
+  /*
+   * A custom time zone that does not allow any of its methods to be called, for
+   * the purpose of asserting that a particular operation does not call into
+   * user code.
+   */
+  timeZoneThrowEverything() {
+    class TimeZoneThrowEverything extends Temporal.TimeZone {
+      constructor() {
+        super("UTC");
+      }
+      getOffsetNanosecondsFor() {
+        TemporalHelpers.assertUnreachable("getOffsetNanosecondsFor should not be called");
+      }
+      getPossibleInstantsFor() {
+        TemporalHelpers.assertUnreachable("getPossibleInstantsFor should not be called");
+      }
+      toString() {
+        TemporalHelpers.assertUnreachable("toString should not be called");
+      }
+    }
+
+    return new TimeZoneThrowEverything();
+  },
+
+  /*
+   * Returns an object that will append logs of any Gets or Calls of its valueOf
+   * or toString properties to the array calls. Both valueOf and toString will
+   * return the actual primitiveValue. propertyName is used in the log.
+   */
+  toPrimitiveObserver(calls, primitiveValue, propertyName) {
+    return {
+      get valueOf() {
+        calls.push(`get ${propertyName}.valueOf`);
+        return function () {
+          calls.push(`call ${propertyName}.valueOf`);
+          return primitiveValue;
+        };
+      },
+      get toString() {
+        calls.push(`get ${propertyName}.toString`);
+        return function () {
+          calls.push(`call ${propertyName}.toString`);
+          if (primitiveValue === undefined) return undefined;
+          return primitiveValue.toString();
+        };
+      },
+    };
+  },
+
+  /*
+   * An object containing further methods that return arrays of ISO strings, for
+   * testing parsers.
+   */
+  ISO: {
+    /*
+     * PlainMonthDay strings that are not valid.
+     */
+    plainMonthDayStringsInvalid() {
+      return [
+        "11-18junk",
+        "11-18[u-ca=gregory]",
+        "11-18[u-ca=hebrew]",
+      ];
+    },
+
+    /*
+     * PlainMonthDay strings that are valid and that should produce October 1st.
+     */
+    plainMonthDayStringsValid() {
+      return [
+        "10-01",
+        "1001",
+        "1965-10-01",
+        "1976-10-01T152330.1+00:00",
+        "19761001T15:23:30.1+00:00",
+        "1976-10-01T15:23:30.1+0000",
+        "1976-10-01T152330.1+0000",
+        "19761001T15:23:30.1+0000",
+        "19761001T152330.1+00:00",
+        "19761001T152330.1+0000",
+        "+001976-10-01T152330.1+00:00",
+        "+0019761001T15:23:30.1+00:00",
+        "+001976-10-01T15:23:30.1+0000",
+        "+001976-10-01T152330.1+0000",
+        "+0019761001T15:23:30.1+0000",
+        "+0019761001T152330.1+00:00",
+        "+0019761001T152330.1+0000",
+        "1976-10-01T15:23:00",
+        "1976-10-01T15:23",
+        "1976-10-01T15",
+        "1976-10-01",
+        "--10-01",
+        "--1001",
+      ];
+    },
+
+    /*
+     * PlainTime strings that may be mistaken for PlainMonthDay or
+     * PlainYearMonth strings, and so require a time designator.
+     */
+    plainTimeStringsAmbiguous() {
+      const ambiguousStrings = [
+        "2021-12",  // ambiguity between YYYY-MM and HHMM-UU
+        "2021-12[-12:00]",  // ditto, TZ does not disambiguate
+        "1214",     // ambiguity between MMDD and HHMM
+        "0229",     //   ditto, including MMDD that doesn't occur every year
+        "1130",     //   ditto, including DD that doesn't occur in every month
+        "12-14",    // ambiguity between MM-DD and HH-UU
+        "12-14[-14:00]",  // ditto, TZ does not disambiguate
+        "202112",   // ambiguity between YYYYMM and HHMMSS
+        "202112[UTC]",  // ditto, TZ does not disambiguate
+      ];
+      // Adding a calendar annotation to one of these strings must not cause
+      // disambiguation in favour of time.
+      const stringsWithCalendar = ambiguousStrings.map((s) => s + '[u-ca=iso8601]');
+      return ambiguousStrings.concat(stringsWithCalendar);
+    },
+
+    /*
+     * PlainTime strings that are of similar form to PlainMonthDay and
+     * PlainYearMonth strings, but are not ambiguous due to components that
+     * aren't valid as months or days.
+     */
+    plainTimeStringsUnambiguous() {
+      return [
+        "2021-13",          // 13 is not a month
+        "202113",           //   ditto
+        "2021-13[-13:00]",  //   ditto
+        "202113[-13:00]",   //   ditto
+        "0000-00",          // 0 is not a month
+        "000000",           //   ditto
+        "0000-00[UTC]",     //   ditto
+        "000000[UTC]",      //   ditto
+        "1314",             // 13 is not a month
+        "13-14",            //   ditto
+        "1232",             // 32 is not a day
+        "0230",             // 30 is not a day in February
+        "0631",             // 31 is not a day in June
+        "0000",             // 0 is neither a month nor a day
+        "00-00",            //   ditto
+      ];
+    },
+
+    /*
+     * PlainYearMonth-like strings that are not valid.
+     */
+    plainYearMonthStringsInvalid() {
+      return [
+        "2020-13",
+      ];
+    },
+
+    /*
+     * PlainYearMonth-like strings that are valid and should produce November
+     * 1976 in the ISO 8601 calendar.
+     */
+    plainYearMonthStringsValid() {
+      return [
+        "1976-11",
+        "1976-11-10",
+        "1976-11-01T09:00:00+00:00",
+        "1976-11-01T00:00:00+05:00",
+        "197611",
+        "+00197611",
+        "1976-11-18T15:23:30.1\u221202:00",
+        "1976-11-18T152330.1+00:00",
+        "19761118T15:23:30.1+00:00",
+        "1976-11-18T15:23:30.1+0000",
+        "1976-11-18T152330.1+0000",
+        "19761118T15:23:30.1+0000",
+        "19761118T152330.1+00:00",
+        "19761118T152330.1+0000",
+        "+001976-11-18T152330.1+00:00",
+        "+0019761118T15:23:30.1+00:00",
+        "+001976-11-18T15:23:30.1+0000",
+        "+001976-11-18T152330.1+0000",
+        "+0019761118T15:23:30.1+0000",
+        "+0019761118T152330.1+00:00",
+        "+0019761118T152330.1+0000",
+        "1976-11-18T15:23",
+        "1976-11-18T15",
+        "1976-11-18",
+      ];
+    },
+
+    /*
+     * PlainYearMonth-like strings that are valid and should produce November of
+     * the ISO year -9999.
+     */
+    plainYearMonthStringsValidNegativeYear() {
+      return [
+        "\u2212009999-11",
+      ];
+    },
+  }
+};
diff --git a/js/src/tests/test262/built-ins/Array/fromAsync/sync-iterable-input-with-non-promise-thenable.js b/js/src/tests/test262/built-ins/Array/fromAsync/sync-iterable-input-with-non-promise-thenable.js
new file mode 100644
index 0000000000..7bdaf5942a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/fromAsync/sync-iterable-input-with-non-promise-thenable.js
@@ -0,0 +1,24 @@
+// |reftest| async
+// Copyright (C) 2023 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.fromasync
+description: Sync-iterable input with non-promise thenables works.
+includes: [compareArray.js, asyncHelpers.js]
+flags: [async]
+features: [Array.fromAsync]
+---*/
+
+asyncTest(async function () {
+  const expectedValue = {};
+  const expected = [ expectedValue ];
+  const inputThenable = {
+    then (resolve, reject) {
+      resolve(expectedValue);
+    },
+  };
+  const input = [ inputThenable ].values();
+  const output = await Array.fromAsync(input);
+  assert.compareArray(output, expected);
+});
diff --git a/js/src/tests/test262/built-ins/Array/fromAsync/sync-iterable-input-with-thenable.js b/js/src/tests/test262/built-ins/Array/fromAsync/sync-iterable-input-with-thenable.js
new file mode 100644
index 0000000000..59b7f5392c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/fromAsync/sync-iterable-input-with-thenable.js
@@ -0,0 +1,18 @@
+// |reftest| async
+// Copyright (C) 2023 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.fromasync
+description: Sync-iterable input with thenables is transferred to the output array.
+includes: [compareArray.js, asyncHelpers.js]
+flags: [async]
+features: [Array.fromAsync]
+---*/
+
+asyncTest(async function () {
+  const expected = [ 0, 1, 2 ];
+  const input = [  0, Promise.resolve(1), Promise.resolve(2) ].values();
+  const output = await Array.fromAsync(input);
+  assert.compareArray(output, expected);
+});
diff --git a/js/src/tests/test262/built-ins/Array/fromAsync/sync-iterable-input.js b/js/src/tests/test262/built-ins/Array/fromAsync/sync-iterable-input.js
new file mode 100644
index 0000000000..283f12d8ab
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/fromAsync/sync-iterable-input.js
@@ -0,0 +1,18 @@
+// |reftest| async
+// Copyright (C) 2023 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.fromasync
+description: Sync-iterable input with no promises is transferred to the output array.
+includes: [compareArray.js, asyncHelpers.js]
+flags: [async]
+features: [Array.fromAsync]
+---*/
+
+asyncTest(async function () {
+  const expected = [ 0, 1, 2 ];
+  const input = [ 0, 1, 2 ].values();
+  const output = await Array.fromAsync(input);
+  assert.compareArray(output, expected);
+});
diff --git a/js/src/tests/test262/built-ins/Array/fromAsync/sync-iterable-iteration-err.js b/js/src/tests/test262/built-ins/Array/fromAsync/sync-iterable-iteration-err.js
new file mode 100644
index 0000000000..91b110e4ed
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/fromAsync/sync-iterable-iteration-err.js
@@ -0,0 +1,20 @@
+// |reftest| async
+// Copyright (C) 2023 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.fromasync
+description: Sync iterable result promise rejects if iteration of input fails.
+includes: [asyncHelpers.js]
+flags: [async]
+features: [Array.fromAsync]
+---*/
+
+asyncTest(async function () {
+  function *generateInput () {
+    throw new Test262Error;
+  }
+  const input = generateInput();
+  const outputPromise = Array.fromAsync(input);
+  await assert.throwsAsync(Test262Error, () => outputPromise);
+});
diff --git a/js/src/tests/test262/built-ins/Array/fromAsync/sync-iterable-with-thenable-async-mapped-awaits-once.js b/js/src/tests/test262/built-ins/Array/fromAsync/sync-iterable-with-thenable-async-mapped-awaits-once.js
new file mode 100644
index 0000000000..1b3bdbf2e7
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/fromAsync/sync-iterable-with-thenable-async-mapped-awaits-once.js
@@ -0,0 +1,26 @@
+// |reftest| async
+// Copyright (C) 2023 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.fromasync
+description: >
+  Sync-iterable input with thenables awaits each input once with async mapping callback.
+includes: [asyncHelpers.js]
+flags: [async]
+features: [Array.fromAsync]
+---*/
+
+asyncTest(async function () {
+  const expectedValue = {};
+  let awaitCounter = 0;
+  const inputThenable = {
+    then (resolve, reject) {
+      awaitCounter++;
+      resolve(expectedValue);
+    },
+  };
+  const input = [ inputThenable ].values();
+  await Array.fromAsync(input, async v => v);
+  assert.sameValue(awaitCounter, 1);
+});
diff --git a/js/src/tests/test262/built-ins/Array/fromAsync/sync-iterable-with-thenable-async-mapped-callback-err.js b/js/src/tests/test262/built-ins/Array/fromAsync/sync-iterable-with-thenable-async-mapped-callback-err.js
new file mode 100644
index 0000000000..d77da6aa10
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/fromAsync/sync-iterable-with-thenable-async-mapped-callback-err.js
@@ -0,0 +1,19 @@
+// |reftest| async
+// Copyright (C) 2023 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.fromasync
+description: Sync-iterable input with thenable result promise rejects if async map function callback throws. 
+includes: [asyncHelpers.js]
+flags: [async]
+features: [Array.fromAsync]
+---*/
+
+asyncTest(async function () {
+  const input = [ Promise.resolve(0) ].values();
+  const outputPromise = Array.fromAsync(input, async v => {
+    throw new Test262Error;
+  });
+  await assert.throwsAsync(Test262Error, () => outputPromise);
+});
diff --git a/js/src/tests/test262/built-ins/Array/fromAsync/sync-iterable-with-thenable-awaits-once.js b/js/src/tests/test262/built-ins/Array/fromAsync/sync-iterable-with-thenable-awaits-once.js
new file mode 100644
index 0000000000..00dd71407c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/fromAsync/sync-iterable-with-thenable-awaits-once.js
@@ -0,0 +1,26 @@
+// |reftest| async
+// Copyright (C) 2023 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.fromasync
+description: >
+  Sync-iterable input with thenables awaits each input once without mapping callback
+includes: [asyncHelpers.js]
+flags: [async]
+features: [Array.fromAsync]
+---*/
+
+asyncTest(async function () {
+  const expectedValue = {};
+  let awaitCounter = 0;
+  const inputThenable = {
+    then (resolve, reject) {
+      awaitCounter++;
+      resolve(expectedValue);
+    },
+  };
+  const input = [ inputThenable ].values();
+  await Array.fromAsync(input);
+  assert.sameValue(awaitCounter, 1);
+});
diff --git a/js/src/tests/test262/built-ins/Array/fromAsync/sync-iterable-with-thenable-element-rejects.js b/js/src/tests/test262/built-ins/Array/fromAsync/sync-iterable-with-thenable-element-rejects.js
new file mode 100644
index 0000000000..b5b0a6c3e4
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/fromAsync/sync-iterable-with-thenable-element-rejects.js
@@ -0,0 +1,22 @@
+// |reftest| async
+// Copyright (C) 2023 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.fromasync
+description: Result promise rejects if then method of input fails. 
+includes: [asyncHelpers.js]
+flags: [async]
+features: [Array.fromAsync]
+---*/
+
+asyncTest(async function () {
+  const inputThenable = {
+    then (resolve, reject) {
+      reject(new Test262Error);
+    },
+  };
+  const input = [ inputThenable ].values();
+  const output = Array.fromAsync(input);
+  await assert.throwsAsync(Test262Error, () => output);
+});
diff --git a/js/src/tests/test262/built-ins/Array/fromAsync/sync-iterable-with-thenable-sync-mapped-awaits-once.js b/js/src/tests/test262/built-ins/Array/fromAsync/sync-iterable-with-thenable-sync-mapped-awaits-once.js
new file mode 100644
index 0000000000..324a7b1701
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/fromAsync/sync-iterable-with-thenable-sync-mapped-awaits-once.js
@@ -0,0 +1,26 @@
+// |reftest| async
+// Copyright (C) 2023 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.fromasync
+description: >
+  Sync-iterable input with mapfn awaits each input once with sync mapping callback
+includes: [asyncHelpers.js]
+flags: [async]
+features: [Array.fromAsync]
+---*/
+
+asyncTest(async function () {
+  const expectedValue = {};
+  let awaitCounter = 0;
+  const inputThenable = {
+    then (resolve, reject) {
+      awaitCounter++;
+      resolve(expectedValue);
+    },
+  };
+  const input = [ inputThenable ].values();
+  await Array.fromAsync(input, v => v);
+  assert.sameValue(awaitCounter, 1);
+});
diff --git a/js/src/tests/test262/built-ins/Array/fromAsync/sync-iterable-with-thenable-sync-mapped-callback-err.js b/js/src/tests/test262/built-ins/Array/fromAsync/sync-iterable-with-thenable-sync-mapped-callback-err.js
new file mode 100644
index 0000000000..d502ec0209
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/fromAsync/sync-iterable-with-thenable-sync-mapped-callback-err.js
@@ -0,0 +1,19 @@
+// |reftest| async
+// Copyright (C) 2023 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.fromasync
+description: Sync-iterable input with thenable result promise rejects if sync map function callback throws. 
+includes: [asyncHelpers.js]
+flags: [async]
+features: [Array.fromAsync]
+---*/
+
+asyncTest(async function () {
+  const input = [ Promise.resolve(0) ].values();
+  const outputPromise = Array.fromAsync(input, v => {
+    throw new Test262Error;
+  });
+  await assert.throwsAsync(Test262Error, () => outputPromise);
+});
diff --git a/js/src/tests/test262/built-ins/Array/fromAsync/sync-iterable-with-thenable-then-method-err.js b/js/src/tests/test262/built-ins/Array/fromAsync/sync-iterable-with-thenable-then-method-err.js
new file mode 100644
index 0000000000..30bd54dac6
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/fromAsync/sync-iterable-with-thenable-then-method-err.js
@@ -0,0 +1,24 @@
+// |reftest| async
+// Copyright (C) 2023 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.fromasync
+description: Result promise rejects if then method of input fails. 
+includes: [asyncHelpers.js]
+flags: [async]
+features: [Array.fromAsync]
+---*/
+
+asyncTest(async function () {
+  const expectedValue = {};
+  const expected = [ expectedValue ];
+  const inputThenable = {
+    then (resolve, reject) {
+      throw new Test262Error();
+    },
+  };
+  const input = [ inputThenable ].values();
+  const output = Array.fromAsync(input);
+  await assert.throwsAsync(Test262Error, () => output);
+});
diff --git a/js/src/tests/test262/built-ins/Array/fromAsync/this-constructor-operations.js b/js/src/tests/test262/built-ins/Array/fromAsync/this-constructor-operations.js
new file mode 100644
index 0000000000..ee96890677
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/fromAsync/this-constructor-operations.js
@@ -0,0 +1,74 @@
+// |reftest| async
+// Copyright (C) 2023 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.fromasync
+description: >
+  Order of user-observable operations on a custom this-value and its instances
+includes: [compareArray.js, asyncHelpers.js]
+flags: [async]
+features: [Array.fromAsync]
+---*/
+
+function formatPropertyName(propertyKey, objectName = "") {
+  switch (typeof propertyKey) {
+    case "symbol":
+      if (Symbol.keyFor(propertyKey) !== undefined) {
+        return `${objectName}[Symbol.for('${Symbol.keyFor(propertyKey)}')]`;
+      } else if (propertyKey.description.startsWith('Symbol.')) {
+        return `${objectName}[${propertyKey.description}]`;
+      } else {
+        return `${objectName}[Symbol('${propertyKey.description}')]`
+      }
+    case "string":
+      if (propertyKey !== String(Number(propertyKey)))
+        return objectName ? `${objectName}.${propertyKey}` : propertyKey;
+      // fall through
+    default:
+      // integer or string integer-index
+      return `${objectName}[${propertyKey}]`;
+  }
+}
+
+asyncTest(async function () {
+  const expectedCalls = [
+    "construct MyArray",
+    "defineProperty A[0]",
+    "defineProperty A[1]",
+    "set A.length"
+  ];
+  const actualCalls = [];
+
+  function MyArray(...args) {
+    actualCalls.push("construct MyArray");
+    return new Proxy(Object.create(null), {
+      set(target, key, value) {
+        actualCalls.push(`set ${formatPropertyName(key, "A")}`);
+        return Reflect.set(target, key, value);
+      },
+      defineProperty(target, key, descriptor) {
+        actualCalls.push(`defineProperty ${formatPropertyName(key, "A")}`);
+        return Reflect.defineProperty(target, key, descriptor);
+      }
+    });
+  }
+
+  let result = await Array.fromAsync.call(MyArray, [1, 2]);
+  assert.compareArray(expectedCalls, actualCalls, "order of operations for array argument");
+
+  actualCalls.splice(0);  // reset
+
+  const expectedCallsForArrayLike = [
+    "construct MyArray",
+    "defineProperty A[0]",
+    "defineProperty A[1]",
+    "set A.length"
+  ];
+  result = await Array.fromAsync.call(MyArray, {
+    length: 2,
+    0: 1,
+    1: 2
+  });
+  assert.compareArray(expectedCallsForArrayLike, actualCalls, "order of operations for array-like argument");
+});
diff --git a/js/src/tests/test262/built-ins/Array/fromAsync/this-constructor-with-bad-length-setter.js b/js/src/tests/test262/built-ins/Array/fromAsync/this-constructor-with-bad-length-setter.js
new file mode 100644
index 0000000000..b3cf982af7
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/fromAsync/this-constructor-with-bad-length-setter.js
@@ -0,0 +1,34 @@
+// |reftest| async
+// Copyright (C) 2023 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.fromasync
+description: >
+  Rejects the promise if setting the length fails on an instance of a custom
+  this-value
+info: |
+  3.j.ii.4.a. Perform ? Set(_A_, *"length"*, 𝔽(_k_), *true*).
+  ...
+  3.k.viii. Perform ? Set(_A_, *"length"*, 𝔽(_len_), *true*)
+includes: [asyncHelpers.js]
+flags: [async]
+features: [Array.fromAsync]
+---*/
+
+asyncTest(async function () {
+  class MyArray {
+    set length(v) {
+      throw new Test262Error("setter of length property throws")
+    }
+  }
+
+  await assert.throwsAsync(Test262Error, () => Array.fromAsync.call(MyArray, [0, 1, 2]), "Promise rejected if setting length fails");
+
+  await assert.throwsAsync(Test262Error, () => Array.fromAsync.call(MyArray, {
+    length: 3,
+    0: 0,
+    1: 1,
+    2: 2
+  }), "Promise rejected if setting length from array-like fails");
+});
diff --git a/js/src/tests/test262/built-ins/Array/fromAsync/this-constructor-with-readonly-elements.js b/js/src/tests/test262/built-ins/Array/fromAsync/this-constructor-with-readonly-elements.js
new file mode 100644
index 0000000000..112824f6e6
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/fromAsync/this-constructor-with-readonly-elements.js
@@ -0,0 +1,51 @@
+// |reftest| async
+// Copyright (C) 2023 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.fromasync
+description: >
+  Overwrites non-writable element properties on an instance of a custom
+  this-value
+info: |
+  3.j.ii.8. Let _defineStatus_ be CreateDataPropertyOrThrow(_A_, _Pk_, _mappedValue_).
+  ...
+  3.k.vii.6. Perform ? CreateDataPropertyOrThrow(_A_, _Pk_, _mappedValue_).
+includes: [asyncHelpers.js]
+flags: [async]
+features: [Array.fromAsync]
+---*/
+
+asyncTest(async function () {
+  function MyArray() {
+    this.length = 4;
+    for (let ix = 0; ix < this.length; ix++) {
+      Object.defineProperty(this, ix, {
+        enumerable: true,
+        writable: false,
+        configurable: true,
+        value: 99
+      });
+    }
+  }
+
+  let result = await Array.fromAsync.call(MyArray, [0, 1, 2]);
+  assert.sameValue(result.length, 3, "Length property is overwritten");
+  assert.sameValue(result[0], 0, "Read-only element 0 is overwritten");
+  assert.sameValue(result[1], 1, "Read-only element 1 is overwritten");
+  assert.sameValue(result[2], 2, "Read-only element 2 is overwritten");
+  assert.sameValue(result[3], 99, "Element 3 is not overwritten");
+
+  result = await Array.fromAsync.call(MyArray, {
+    length: 3,
+    0: 0,
+    1: 1,
+    2: 2,
+    3: 3  // ignored
+  });
+  assert.sameValue(result.length, 3, "Length property is overwritten");
+  assert.sameValue(result[0], 0, "Read-only element 0 is overwritten");
+  assert.sameValue(result[1], 1, "Read-only element 1 is overwritten");
+  assert.sameValue(result[2], 2, "Read-only element 2 is overwritten");
+  assert.sameValue(result[3], 99, "Element 3 is not overwritten");
+});
diff --git a/js/src/tests/test262/built-ins/Array/fromAsync/this-constructor-with-readonly-length.js b/js/src/tests/test262/built-ins/Array/fromAsync/this-constructor-with-readonly-length.js
new file mode 100644
index 0000000000..f5f9495004
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/fromAsync/this-constructor-with-readonly-length.js
@@ -0,0 +1,39 @@
+// |reftest| async
+// Copyright (C) 2023 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.fromasync
+description: >
+  Promise is rejected if length property on an instance of a custom this-value
+  is non-writable
+info: |
+  3.j.ii.4.a. Perform ? Set(_A_, *"length"*, 𝔽(_k_), *true*).
+  ...
+  3.k.viii. Perform ? Set(_A_, *"length"*, 𝔽(_len_), *true*).
+
+  Note that there is no difference between strict mode and sloppy mode, because
+  we are not following runtime evaluation semantics.
+includes: [asyncHelpers.js]
+flags: [async]
+features: [Array.fromAsync]
+---*/
+
+asyncTest(async function () {
+  function MyArray() {
+    Object.defineProperty(this, "length", {
+      enumerable: true,
+      writable: false,
+      configurable: true,
+      value: 99
+    });
+  }
+
+  await assert.throwsAsync(TypeError, () => Array.fromAsync.call(MyArray, [0, 1, 2]), "Setting read-only length fails");
+  await assert.throwsAsync(TypeError, () => Array.fromAsync.call(MyArray, {
+    length: 3,
+    0: 0,
+    1: 1,
+    2: 2
+  }), "Setting read-only length fails in array-like case");
+});
diff --git a/js/src/tests/test262/built-ins/Array/fromAsync/this-constructor-with-unsettable-element-closes-async-iterator.js b/js/src/tests/test262/built-ins/Array/fromAsync/this-constructor-with-unsettable-element-closes-async-iterator.js
new file mode 100644
index 0000000000..4986847991
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/fromAsync/this-constructor-with-unsettable-element-closes-async-iterator.js
@@ -0,0 +1,44 @@
+// |reftest| async
+// Copyright (C) 2023 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.fromasync
+description: >
+  Closes an async iterator if setting an element fails on an instance of a
+  custom this-value
+info: |
+  3.j.ii.8. Let _defineStatus_ be CreateDataPropertyOrThrow(_A_, _Pk_, _mappedValue_).
+  9. If _defineStatus_ is an abrupt completion, return ? AsyncIteratorClose(_iteratorRecord_, _defineStatus_).
+includes: [asyncHelpers.js]
+flags: [async]
+features: [Array.fromAsync]
+---*/
+
+asyncTest(async function () {
+  function MyArray() {
+    Object.defineProperty(this, 0, {
+      enumerable: true,
+      writable: true,
+      configurable: false,
+      value: 0
+    });
+  }
+
+  let closed = false;
+  const iterator = {
+    next() {
+      return Promise.resolve({ value: 1, done: false });
+    },
+    return() {
+      closed = true;
+      return Promise.resolve({ done: true });
+    },
+    [Symbol.asyncIterator]() {
+      return this;
+    }
+  }
+
+  await assert.throwsAsync(TypeError, () => Array.fromAsync.call(MyArray, iterator), "Promise rejected if defining element fails");
+  assert(closed, "element define failure should close iterator");
+});
diff --git a/js/src/tests/test262/built-ins/Array/fromAsync/this-constructor-with-unsettable-element-closes-sync-iterator.js b/js/src/tests/test262/built-ins/Array/fromAsync/this-constructor-with-unsettable-element-closes-sync-iterator.js
new file mode 100644
index 0000000000..8138532547
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/fromAsync/this-constructor-with-unsettable-element-closes-sync-iterator.js
@@ -0,0 +1,44 @@
+// |reftest| async
+// Copyright (C) 2023 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.fromasync
+description: >
+  Closes a sync iterator if setting an element fails on an instance of a custom
+  this-value
+info: |
+  3.j.ii.8. Let _defineStatus_ be CreateDataPropertyOrThrow(_A_, _Pk_, _mappedValue_).
+  9. If _defineStatus_ is an abrupt completion, return ? AsyncIteratorClose(_iteratorRecord_, _defineStatus_).
+includes: [asyncHelpers.js]
+flags: [async]
+features: [Array.fromAsync]
+---*/
+
+asyncTest(async function () {
+  function MyArray() {
+    Object.defineProperty(this, 0, {
+      enumerable: true,
+      writable: true,
+      configurable: false,
+      value: 0
+    });
+  }
+
+  let closed = false;
+  const iterator = {
+    next() {
+      return { value: 1, done: false };
+    },
+    return() {
+      closed = true;
+      return { done: true };
+    },
+    [Symbol.iterator]() {
+      return this;
+    }
+  }
+
+  await assert.throwsAsync(TypeError, () => Array.fromAsync.call(MyArray, iterator), "Promise rejected if defining element fails");
+  assert(closed, "element define failure should close iterator");
+});
diff --git a/js/src/tests/test262/built-ins/Array/fromAsync/this-constructor-with-unsettable-element.js b/js/src/tests/test262/built-ins/Array/fromAsync/this-constructor-with-unsettable-element.js
new file mode 100644
index 0000000000..de283488f7
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/fromAsync/this-constructor-with-unsettable-element.js
@@ -0,0 +1,29 @@
+// |reftest| async
+// Copyright (C) 2023 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.fromasync
+description: >
+  Rejects the promise if setting an element fails on an instance of a custom
+  this-value
+info: |
+  3.j.ii.8. Let _defineStatus_ be CreateDataPropertyOrThrow(_A_, _Pk_, _mappedValue_).
+  9. If _defineStatus_ is an abrupt completion, return ? AsyncIteratorClose(_iteratorRecord_, _defineStatus_).
+includes: [asyncHelpers.js]
+flags: [async]
+features: [Array.fromAsync]
+---*/
+
+asyncTest(async function () {
+  function MyArray() {
+    Object.defineProperty(this, 0, {
+      enumerable: true,
+      writable: true,
+      configurable: false,
+      value: 0
+    });
+  }
+
+  await assert.throwsAsync(TypeError, () => Array.fromAsync.call(MyArray, [0, 1, 2]), "Promise rejected if defining element fails");
+});
diff --git a/js/src/tests/test262/built-ins/Array/fromAsync/this-constructor.js b/js/src/tests/test262/built-ins/Array/fromAsync/this-constructor.js
new file mode 100644
index 0000000000..e8c2c1948f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/fromAsync/this-constructor.js
@@ -0,0 +1,53 @@
+// |reftest| async
+// Copyright (C) 2023 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.fromasync
+description: >
+  Constructs the this-value once if asyncItems is iterable, twice if not, and
+  length and element properties are set correctly on the result
+info: |
+  3.e. If IsConstructor(_C_) is *true*, then
+    i. Let _A_ be ? Construct(_C_).
+  ...
+  j. If _iteratorRecord_ is not *undefined*, then
+    ...
+  k. Else,
+    ...
+    iv. If IsConstructor(_C_) is *true*, then
+      1. Let _A_ be ? Construct(_C_, « 𝔽(_len_) »).
+includes: [compareArray.js, asyncHelpers.js]
+flags: [async]
+features: [Array.fromAsync]
+---*/
+
+asyncTest(async function () {
+  const constructorCalls = [];
+
+  function MyArray(...args) {
+    constructorCalls.push(args);
+  }
+
+  let result = await Array.fromAsync.call(MyArray, [1, 2]);
+  assert(result instanceof MyArray, "result is an instance of the constructor this-value");
+  assert.sameValue(result.length, 2, "length is set on result");
+  assert.sameValue(result[0], 1, "element 0 is set on result");
+  assert.sameValue(result[1], 2, "element 1 is set on result");
+  assert.sameValue(constructorCalls.length, 1, "constructor is called once");
+  assert.compareArray(constructorCalls[0], [], "constructor is called with no arguments");
+
+  constructorCalls.splice(0);  // reset
+
+  result = await Array.fromAsync.call(MyArray, {
+    length: 2,
+    0: 1,
+    1: 2
+  });
+  assert(result instanceof MyArray, "result is an instance of the constructor this-value");
+  assert.sameValue(result.length, 2, "length is set on result");
+  assert.sameValue(result[0], 1, "element 0 is set on result");
+  assert.sameValue(result[1], 2, "element 1 is set on result");
+  assert.sameValue(constructorCalls.length, 1, "constructor is called once");
+  assert.compareArray(constructorCalls[0], [2], "constructor is called with a length argument");
+});
diff --git a/js/src/tests/test262/built-ins/Array/fromAsync/this-non-constructor.js b/js/src/tests/test262/built-ins/Array/fromAsync/this-non-constructor.js
new file mode 100644
index 0000000000..10934a855a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/fromAsync/this-non-constructor.js
@@ -0,0 +1,49 @@
+// |reftest| async
+// Copyright (C) 2023 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.fromasync
+description: >
+  Constructs an intrinsic Array if this-value is not a constructor, and length
+  and element properties are set accordingly.
+info: |
+  3.e. If IsConstructor(_C_) is *true*, then
+    ...
+  f. Else,
+    i. Let _A_ be ! ArrayCreate(0).
+
+  ...
+  j. If _iteratorRecord_ is not *undefined*, then
+    ...
+  k. Else,
+    ...
+    iv. If IsConstructor(_C_) is *true*, then
+      ...
+    v. Else,
+      1. Let _A_ be ? ArrayCreate(_len_).
+includes: [compareArray.js, asyncHelpers.js]
+flags: [async]
+features: [Array.fromAsync]
+---*/
+
+asyncTest(async function () {
+  const thisValue = {
+    length: 4000,
+    0: 32,
+    1: 64,
+    2: 128
+  };
+
+  let result = await Array.fromAsync.call(thisValue, [1, 2]);
+  assert(Array.isArray(result), "result is an intrinsic Array");
+  assert.compareArray(result, [1, 2], "result is not disrupted by properties of this-value");
+
+  result = await Array.fromAsync.call(thisValue, {
+    length: 2,
+    0: 1,
+    1: 2
+  });
+  assert(Array.isArray(result), "result is an intrinsic Array");
+  assert.compareArray(result, [1, 2], "result is not disrupted by properties of this-value");
+});
diff --git a/js/src/tests/test262/built-ins/Array/fromAsync/thisarg-object.js b/js/src/tests/test262/built-ins/Array/fromAsync/thisarg-object.js
new file mode 100644
index 0000000000..5d2c9cdc53
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/fromAsync/thisarg-object.js
@@ -0,0 +1,22 @@
+// |reftest| async
+// Copyright (C) 2022 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.fromasync
+description: If thisArg is an object, it's bound to mapfn as the this-value
+info: |
+  6. If _mapping_ is *true*, then
+    a. Let _mappedValue_ be Call(_mapfn_, _thisArg_, « _nextValue_, 𝔽(_k_) »).
+flags: [async]
+includes: [asyncHelpers.js]
+features: [Array.fromAsync]
+---*/
+
+asyncTest(async () => {
+  const myThisValue = {};
+
+  await Array.fromAsync([1, 2, 3], async function () {
+    assert.sameValue(this, myThisValue, "thisArg should be bound as the this-value of mapfn");
+  }, myThisValue);
+});
diff --git a/js/src/tests/test262/built-ins/Array/fromAsync/thisarg-omitted-sloppy.js b/js/src/tests/test262/built-ins/Array/fromAsync/thisarg-omitted-sloppy.js
new file mode 100644
index 0000000000..c3440dd99c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/fromAsync/thisarg-omitted-sloppy.js
@@ -0,0 +1,34 @@
+// |reftest| async
+// Copyright (C) 2022 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.fromasync
+description: >
+  If thisArg is omitted, mapfn is called with the global object as the
+  this-value in sloppy mode
+info: |
+  6. If _mapping_ is *true*, then
+    a. Let _mappedValue_ be Call(_mapfn_, _thisArg_, « _nextValue_, 𝔽(_k_) »).
+
+  OrdinaryCallBindThis, when _F_.[[ThisMode]] is ~global~, where _F_ is the
+  function object:
+  6. Else,
+    a. If _thisArgument_ is *undefined* or *null*, then
+      i. Let _globalEnv_ be _calleeRealm_.[[GlobalEnv]].
+      ii. Assert: _globalEnv_ is a Global Environment Record.
+      iii. Let _thisValue_ be _globalEnv_.[[GlobalThisValue]].
+flags: [async, noStrict]
+includes: [asyncHelpers.js]
+features: [Array.fromAsync]
+---*/
+
+asyncTest(async () => {
+  await Array.fromAsync([1, 2, 3], async function () {
+    assert.sameValue(
+      this,
+      globalThis,
+      "the global should be bound as the this-value of mapfn when thisArg is omitted"
+    );
+  });
+});
diff --git a/js/src/tests/test262/built-ins/Array/fromAsync/thisarg-omitted-strict-strict.js b/js/src/tests/test262/built-ins/Array/fromAsync/thisarg-omitted-strict-strict.js
new file mode 100644
index 0000000000..1f78261466
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/fromAsync/thisarg-omitted-strict-strict.js
@@ -0,0 +1,30 @@
+// |reftest| async
+'use strict';
+// Copyright (C) 2022 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.fromasync
+description: >
+  If thisArg is omitted, mapfn is called with undefined as the this-value in
+  strict mode
+info: |
+  6. If _mapping_ is *true*, then
+    a. Let _mappedValue_ be Call(_mapfn_, _thisArg_, « _nextValue_, 𝔽(_k_) »).
+
+  In OrdinaryCallBindThis, _thisArgument_ is always bound as the this-value in
+  strict mode (_F_.[[ThisMode]] is ~strict~, where _F_ is the function object.)
+flags: [async, onlyStrict]
+includes: [asyncHelpers.js]
+features: [Array.fromAsync]
+---*/
+
+asyncTest(async () => {
+  await Array.fromAsync([1, 2, 3], async function () {
+    assert.sameValue(
+      this,
+      undefined,
+      "undefined should be bound as the this-value of mapfn when thisArg is omitted"
+    );
+  });
+});
diff --git a/js/src/tests/test262/built-ins/Array/fromAsync/thisarg-primitive-sloppy.js b/js/src/tests/test262/built-ins/Array/fromAsync/thisarg-primitive-sloppy.js
new file mode 100644
index 0000000000..244be840a8
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/fromAsync/thisarg-primitive-sloppy.js
@@ -0,0 +1,76 @@
+// |reftest| async
+// Copyright (C) 2022 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.fromasync
+description: >
+  If thisArg is a primitive, mapfn is called with a wrapper this-value or the
+  global, according to the usual rules of sloppy mode
+info: |
+  6. If _mapping_ is *true*, then
+    a. Let _mappedValue_ be Call(_mapfn_, _thisArg_, « _nextValue_, 𝔽(_k_) »).
+
+  OrdinaryCallBindThis, when _F_.[[ThisMode]] is ~global~, where _F_ is the
+  function object:
+  6. Else,
+    a. If _thisArgument_ is *undefined* or *null*, then
+      i. Let _globalEnv_ be _calleeRealm_.[[GlobalEnv]].
+      ii. Assert: _globalEnv_ is a Global Environment Record.
+      iii. Let _thisValue_ be _globalEnv_.[[GlobalThisValue]].
+    b. Else,
+      i. Let _thisValue_ be ! ToObject(_thisArgument_).
+      ii. NOTE: ToObject produces wrapper objects using _calleeRealm_.
+flags: [async, noStrict]
+includes: [asyncHelpers.js]
+features: [Array.fromAsync]
+---*/
+
+asyncTest(async () => {
+  await Array.fromAsync([1, 2, 3], async function () {
+    assert.sameValue(
+      this,
+      globalThis,
+      "the global should be bound as the this-value of mapfn when thisArg is undefined"
+    );
+  }, undefined);
+
+  await Array.fromAsync([1, 2, 3], async function () {
+    assert.sameValue(
+      this,
+      globalThis,
+      "the global should be bound as the this-value of mapfn when thisArg is null"
+    );
+  }, null);
+
+  await Array.fromAsync([1, 2, 3], async function () {
+    assert.notSameValue(this, "string", "string thisArg should not be bound as the this-value of mapfn");
+    assert.sameValue(typeof this, "object", "a String wrapper object should be bound as the this-value of mapfn when thisArg is a string")
+    assert.sameValue(this.valueOf(), "string", "String wrapper object should have the same primitive value as thisArg");
+  }, "string");
+
+  await Array.fromAsync([1, 2, 3], async function () {
+    assert.notSameValue(this, 3.1416, "number thisArg should be not bound as the this-value of mapfn");
+    assert.sameValue(typeof this, "object", "a Number wrapper object should be bound as the this-value of mapfn when thisArg is a number")
+    assert.sameValue(this.valueOf(), 3.1416, "Number wrapper object should have the same primitive value as thisArg");
+  }, 3.1416);
+
+  await Array.fromAsync([1, 2, 3], async function () {
+    assert.notSameValue(this, 42n, "bigint thisArg should not be bound as the this-value of mapfn");
+    assert.sameValue(typeof this, "object", "a BigInt wrapper object should be bound as the this-value of mapfn when thisArg is a bigint")
+    assert.sameValue(this.valueOf(), 42n, "BigInt wrapper object should have the same primitive value as thisArg");
+  }, 42n);
+
+  await Array.fromAsync([1, 2, 3], async function () {
+    assert.notSameValue(this, true, "boolean thisArg should not be bound as the this-value of mapfn");
+    assert.sameValue(typeof this, "object", "a Boolean wrapper object should be bound as the this-value of mapfn when thisArg is a boolean")
+    assert.sameValue(this.valueOf(), true, "Boolean wrapper object should have the same primitive value as thisArg");
+  }, true);
+
+  const symbolThis = Symbol("symbol");
+  await Array.fromAsync([1, 2, 3], async function () {
+    assert.notSameValue(this, symbolThis, "symbol thisArg should not be bound as the this-value of mapfn");
+    assert.sameValue(typeof this, "object", "a Symbol wrapper object should be bound as the this-value of mapfn when thisArg is a symbol")
+    assert.sameValue(this.valueOf(), symbolThis, "Symbol wrapper object should have the same primitive value as thisArg");
+  }, symbolThis);
+});
diff --git a/js/src/tests/test262/built-ins/Array/fromAsync/thisarg-primitive-strict-strict.js b/js/src/tests/test262/built-ins/Array/fromAsync/thisarg-primitive-strict-strict.js
new file mode 100644
index 0000000000..c66582ebde
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/fromAsync/thisarg-primitive-strict-strict.js
@@ -0,0 +1,51 @@
+// |reftest| async
+'use strict';
+// Copyright (C) 2022 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.fromasync
+description: >
+  If thisArg is a primitive, mapfn is called with it as the this-value in strict
+  mode
+info: |
+  6. If _mapping_ is *true*, then
+    a. Let _mappedValue_ be Call(_mapfn_, _thisArg_, « _nextValue_, 𝔽(_k_) »).
+
+  In OrdinaryCallBindThis, _thisArgument_ is always bound as the this-value in
+  strict mode (_F_.[[ThisMode]] is ~strict~, where _F_ is the function object.)
+flags: [async, onlyStrict]
+includes: [asyncHelpers.js]
+features: [Array.fromAsync]
+---*/
+
+asyncTest(async () => {
+  await Array.fromAsync([1, 2, 3], async function () {
+    assert.sameValue(this, undefined, "undefined thisArg should be bound as the this-value of mapfn");
+  }, undefined);
+
+  await Array.fromAsync([1, 2, 3], async function () {
+    assert.sameValue(this, null, "null thisArg should be bound as the this-value of mapfn");
+  }, null);
+
+  await Array.fromAsync([1, 2, 3], async function () {
+    assert.sameValue(this, "string", "string thisArg should be bound as the this-value of mapfn");
+  }, "string");
+
+  await Array.fromAsync([1, 2, 3], async function () {
+    assert.sameValue(this, 3.1416, "number thisArg should be bound as the this-value of mapfn");
+  }, 3.1416);
+
+  await Array.fromAsync([1, 2, 3], async function () {
+    assert.sameValue(this, 42n, "bigint thisArg should be bound as the this-value of mapfn");
+  }, 42n);
+
+  await Array.fromAsync([1, 2, 3], async function () {
+    assert.sameValue(this, true, "boolean thisArg should be bound as the this-value of mapfn");
+  }, true);
+
+  const symbolThis = Symbol("symbol");
+  await Array.fromAsync([1, 2, 3], async function () {
+    assert.sameValue(this, symbolThis, "symbol thisArg should be bound as the this-value of mapfn");
+  }, symbolThis);
+});
diff --git a/js/src/tests/test262/built-ins/Array/is-a-constructor.js b/js/src/tests/test262/built-ins/Array/is-a-constructor.js
new file mode 100644
index 0000000000..477b9c5aaa
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/is-a-constructor.js
@@ -0,0 +1,26 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Array implements [[Construct]]
+info: |
+  IsConstructor ( argument )
+
+  The abstract operation IsConstructor takes argument argument (an ECMAScript language value).
+  It determines if argument is a function object with a [[Construct]] internal method.
+  It performs the following steps when called:
+
+  If Type(argument) is not Object, return false.
+  If argument has a [[Construct]] internal method, return true.
+  Return false.
+includes: [isConstructor.js]
+features: [Reflect.construct]
+---*/
+
+assert.sameValue(isConstructor(Array), true, 'isConstructor(Array) must return true');
+new Array();
+  
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/isArray/15.4.3.2-0-1.js b/js/src/tests/test262/built-ins/Array/isArray/15.4.3.2-0-1.js
new file mode 100644
index 0000000000..57a95072e4
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/isArray/15.4.3.2-0-1.js
@@ -0,0 +1,14 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.isarray
+es5id: 15.4.3.2-0-1
+description: Array.isArray must exist as a function
+---*/
+
+var f = Array.isArray;
+
+assert.sameValue(typeof f, "function", 'The value of `typeof f` is expected to be "function"');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/isArray/15.4.3.2-0-2.js b/js/src/tests/test262/built-ins/Array/isArray/15.4.3.2-0-2.js
new file mode 100644
index 0000000000..5de00e3075
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/isArray/15.4.3.2-0-2.js
@@ -0,0 +1,12 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.isarray
+es5id: 15.4.3.2-0-2
+description: Array.isArray must exist as a function taking 1 parameter
+---*/
+
+assert.sameValue(Array.isArray.length, 1, 'The value of Array.isArray.length is expected to be 1');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/isArray/15.4.3.2-0-3.js b/js/src/tests/test262/built-ins/Array/isArray/15.4.3.2-0-3.js
new file mode 100644
index 0000000000..a662307ad0
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/isArray/15.4.3.2-0-3.js
@@ -0,0 +1,12 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.isarray
+es5id: 15.4.3.2-0-3
+description: Array.isArray return true if its argument is an Array
+---*/
+
+assert.sameValue(Array.isArray([]), true, 'Array.isArray([]) must return true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/isArray/15.4.3.2-0-4.js b/js/src/tests/test262/built-ins/Array/isArray/15.4.3.2-0-4.js
new file mode 100644
index 0000000000..7d9c550665
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/isArray/15.4.3.2-0-4.js
@@ -0,0 +1,16 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.isarray
+description: Array.isArray return false if its argument is not an Array
+---*/
+
+assert.sameValue(Array.isArray(42), false, 'Array.isArray(42) must return false');
+assert.sameValue(Array.isArray(undefined), false, 'Array.isArray(undefined) must return false');
+assert.sameValue(Array.isArray(true), false, 'Array.isArray(true) must return false');
+assert.sameValue(Array.isArray("abc"), false, 'Array.isArray("abc") must return false');
+assert.sameValue(Array.isArray({}), false, 'Array.isArray({}) must return false');
+assert.sameValue(Array.isArray(null), false, 'Array.isArray(null) must return false');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/isArray/15.4.3.2-0-5.js b/js/src/tests/test262/built-ins/Array/isArray/15.4.3.2-0-5.js
new file mode 100644
index 0000000000..6af24845a8
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/isArray/15.4.3.2-0-5.js
@@ -0,0 +1,14 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.isarray
+es5id: 15.4.3.2-0-5
+description: >
+    Array.isArray return true if its argument is an Array
+    (Array.prototype)
+---*/
+
+assert.sameValue(Array.isArray(Array.prototype), true, 'Array.isArray(Array.prototype) must return true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/isArray/15.4.3.2-0-6.js b/js/src/tests/test262/built-ins/Array/isArray/15.4.3.2-0-6.js
new file mode 100644
index 0000000000..3af98c17bc
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/isArray/15.4.3.2-0-6.js
@@ -0,0 +1,12 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.isarray
+es5id: 15.4.3.2-0-6
+description: Array.isArray return true if its argument is an Array (new Array())
+---*/
+
+assert.sameValue(Array.isArray(new Array(10)), true, 'Array.isArray(new Array(10)) must return true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/isArray/15.4.3.2-0-7.js b/js/src/tests/test262/built-ins/Array/isArray/15.4.3.2-0-7.js
new file mode 100644
index 0000000000..93c0e27bab
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/isArray/15.4.3.2-0-7.js
@@ -0,0 +1,12 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.isarray
+es5id: 15.4.3.2-0-7
+description: Array.isArray returns false if its argument is not an Array
+---*/
+
+assert.sameValue(Array.isArray({}), false, 'Array.isArray({}) must return false');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/isArray/15.4.3.2-1-1.js b/js/src/tests/test262/built-ins/Array/isArray/15.4.3.2-1-1.js
new file mode 100644
index 0000000000..d39c16f00f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/isArray/15.4.3.2-1-1.js
@@ -0,0 +1,12 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.isarray
+es5id: 15.4.3.2-1-1
+description: Array.isArray applied to boolean primitive
+---*/
+
+assert.sameValue(Array.isArray(true), false, 'Array.isArray(true) must return false');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/isArray/15.4.3.2-1-10.js b/js/src/tests/test262/built-ins/Array/isArray/15.4.3.2-1-10.js
new file mode 100644
index 0000000000..d70ca88894
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/isArray/15.4.3.2-1-10.js
@@ -0,0 +1,12 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.isarray
+es5id: 15.4.3.2-1-10
+description: Array.isArray applied to RegExp object
+---*/
+
+assert.sameValue(Array.isArray(new RegExp()), false, 'Array.isArray(new RegExp()) must return false');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/isArray/15.4.3.2-1-11.js b/js/src/tests/test262/built-ins/Array/isArray/15.4.3.2-1-11.js
new file mode 100644
index 0000000000..83083bb9a0
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/isArray/15.4.3.2-1-11.js
@@ -0,0 +1,12 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.isarray
+es5id: 15.4.3.2-1-11
+description: Array.isArray applied to the JSON object
+---*/
+
+assert.sameValue(Array.isArray(JSON), false, 'Array.isArray(JSON) must return false');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/isArray/15.4.3.2-1-12.js b/js/src/tests/test262/built-ins/Array/isArray/15.4.3.2-1-12.js
new file mode 100644
index 0000000000..b3ce684eba
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/isArray/15.4.3.2-1-12.js
@@ -0,0 +1,12 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.isarray
+es5id: 15.4.3.2-1-12
+description: Array.isArray applied to Error object
+---*/
+
+assert.sameValue(Array.isArray(new SyntaxError()), false, 'Array.isArray(new SyntaxError()) must return false');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/isArray/15.4.3.2-1-13.js b/js/src/tests/test262/built-ins/Array/isArray/15.4.3.2-1-13.js
new file mode 100644
index 0000000000..5cb31026cd
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/isArray/15.4.3.2-1-13.js
@@ -0,0 +1,18 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.isarray
+es5id: 15.4.3.2-1-13
+description: Array.isArray applied to Arguments object
+---*/
+
+var arg;
+
+(function fun() {
+  arg = arguments;
+}(1, 2, 3));
+
+assert.sameValue(Array.isArray(arg), false, 'Array.isArray(arguments) must return false');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/isArray/15.4.3.2-1-15.js b/js/src/tests/test262/built-ins/Array/isArray/15.4.3.2-1-15.js
new file mode 100644
index 0000000000..6564340b3f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/isArray/15.4.3.2-1-15.js
@@ -0,0 +1,12 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.isarray
+es5id: 15.4.3.2-1-15
+description: Array.isArray applied to the global object
+---*/
+
+assert.sameValue(Array.isArray(this), false, 'Array.isArray(this) must return false');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/isArray/15.4.3.2-1-2.js b/js/src/tests/test262/built-ins/Array/isArray/15.4.3.2-1-2.js
new file mode 100644
index 0000000000..dc13b782a3
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/isArray/15.4.3.2-1-2.js
@@ -0,0 +1,12 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.isarray
+es5id: 15.4.3.2-1-2
+description: Array.isArray applied to Boolean Object
+---*/
+
+assert.sameValue(Array.isArray(new Boolean(false)), false, 'Array.isArray(new Boolean(false)) must return false');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/isArray/15.4.3.2-1-3.js b/js/src/tests/test262/built-ins/Array/isArray/15.4.3.2-1-3.js
new file mode 100644
index 0000000000..cbf26a5599
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/isArray/15.4.3.2-1-3.js
@@ -0,0 +1,12 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.isarray
+es5id: 15.4.3.2-1-3
+description: Array.isArray applied to number primitive
+---*/
+
+assert.sameValue(Array.isArray(5), false, 'Array.isArray(5) must return false');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/isArray/15.4.3.2-1-4.js b/js/src/tests/test262/built-ins/Array/isArray/15.4.3.2-1-4.js
new file mode 100644
index 0000000000..2df256a118
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/isArray/15.4.3.2-1-4.js
@@ -0,0 +1,12 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.isarray
+es5id: 15.4.3.2-1-4
+description: Array.isArray applied to Number object
+---*/
+
+assert.sameValue(Array.isArray(new Number(-3)), false, 'Array.isArray(new Number(-3)) must return false');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/isArray/15.4.3.2-1-5.js b/js/src/tests/test262/built-ins/Array/isArray/15.4.3.2-1-5.js
new file mode 100644
index 0000000000..05d7303288
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/isArray/15.4.3.2-1-5.js
@@ -0,0 +1,12 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.isarray
+es5id: 15.4.3.2-1-5
+description: Array.isArray applied to string primitive
+---*/
+
+assert.sameValue(Array.isArray("abc"), false, 'Array.isArray("abc") must return false');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/isArray/15.4.3.2-1-6.js b/js/src/tests/test262/built-ins/Array/isArray/15.4.3.2-1-6.js
new file mode 100644
index 0000000000..1c2e9d3e18
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/isArray/15.4.3.2-1-6.js
@@ -0,0 +1,12 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.isarray
+es5id: 15.4.3.2-1-6
+description: Array.isArray applied to String object
+---*/
+
+assert.sameValue(Array.isArray(new String("hello\nworld\\!")), false, 'Array.isArray(new String("hello\\nworld\\\\!")) must return false');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/isArray/15.4.3.2-1-7.js b/js/src/tests/test262/built-ins/Array/isArray/15.4.3.2-1-7.js
new file mode 100644
index 0000000000..18708528e8
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/isArray/15.4.3.2-1-7.js
@@ -0,0 +1,12 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.isarray
+es5id: 15.4.3.2-1-7
+description: Array.isArray applied to Function object
+---*/
+
+assert.sameValue(Array.isArray(function() {}), false, 'Array.isArray(function() {}) must return false');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/isArray/15.4.3.2-1-8.js b/js/src/tests/test262/built-ins/Array/isArray/15.4.3.2-1-8.js
new file mode 100644
index 0000000000..24b0c41a58
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/isArray/15.4.3.2-1-8.js
@@ -0,0 +1,12 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.isarray
+es5id: 15.4.3.2-1-8
+description: Array.isArray applied to the Math object
+---*/
+
+assert.sameValue(Array.isArray(Math), false, 'Array.isArray(Math) must return false');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/isArray/15.4.3.2-1-9.js b/js/src/tests/test262/built-ins/Array/isArray/15.4.3.2-1-9.js
new file mode 100644
index 0000000000..869f611895
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/isArray/15.4.3.2-1-9.js
@@ -0,0 +1,12 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.isarray
+es5id: 15.4.3.2-1-9
+description: Array.isArray applied to Date object
+---*/
+
+assert.sameValue(Array.isArray(new Date()), false, 'Array.isArray(new Date()) must return false');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/isArray/15.4.3.2-2-1.js b/js/src/tests/test262/built-ins/Array/isArray/15.4.3.2-2-1.js
new file mode 100644
index 0000000000..1592f1a734
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/isArray/15.4.3.2-2-1.js
@@ -0,0 +1,18 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.isarray
+es5id: 15.4.3.2-2-1
+description: Array.isArray applied to an object with an array as the prototype
+---*/
+
+var proto = [];
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+
+assert.sameValue(Array.isArray(child), false, 'Array.isArray(new Con()) must return false');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/isArray/15.4.3.2-2-2.js b/js/src/tests/test262/built-ins/Array/isArray/15.4.3.2-2-2.js
new file mode 100644
index 0000000000..8bf0e08d26
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/isArray/15.4.3.2-2-2.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.isarray
+es5id: 15.4.3.2-2-2
+description: >
+    Array.isArray applied to an object with Array.prototype as the
+    prototype
+---*/
+
+var proto = Array.prototype;
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+
+assert.sameValue(Array.isArray(child), false, 'Array.isArray(new Con()) must return false');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/isArray/15.4.3.2-2-3.js b/js/src/tests/test262/built-ins/Array/isArray/15.4.3.2-2-3.js
new file mode 100644
index 0000000000..b61e821676
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/isArray/15.4.3.2-2-3.js
@@ -0,0 +1,18 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.isarray
+es5id: 15.4.3.2-2-3
+description: >
+    Array.isArray applied to an Array-like object with length and some
+    indexed properties
+---*/
+
+assert.sameValue(Array.isArray({
+  0: 12,
+  1: 9,
+  length: 2
+}), false, 'Array.isArray({0: 12, 1: 9, length: 2}) must return false');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/isArray/browser.js b/js/src/tests/test262/built-ins/Array/isArray/browser.js
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/js/src/tests/test262/built-ins/Array/isArray/descriptor.js b/js/src/tests/test262/built-ins/Array/isArray/descriptor.js
new file mode 100644
index 0000000000..1c5c6ef73b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/isArray/descriptor.js
@@ -0,0 +1,14 @@
+// Copyright 2017 Lyza Danger Gardner. All rights reserved.
+// This code is governed by the license found in the LICENSE file.
+
+/*---
+description: Testing descriptor property of Array.isArray
+includes: [propertyHelper.js]
+esid: sec-array.isarray
+---*/
+
+verifyWritable(Array, "isArray");
+verifyNotEnumerable(Array, "isArray");
+verifyConfigurable(Array, "isArray");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/isArray/name.js b/js/src/tests/test262/built-ins/Array/isArray/name.js
new file mode 100644
index 0000000000..1b2ebb5e42
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/isArray/name.js
@@ -0,0 +1,29 @@
+// Copyright (C) 2015 André Bargull. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.isarray
+es6id: 22.1.2.2
+description: >
+  Array.isArray.name is "isArray".
+info: |
+  Array.isArray ( arg )
+
+  17 ECMAScript Standard Built-in Objects:
+    Every built-in Function object, including constructors, that is not
+    identified as an anonymous function has a name property whose value
+    is a String.
+
+    Unless otherwise specified, the name property of a built-in Function
+    object, if it exists, has the attributes { [[Writable]]: false,
+    [[Enumerable]]: false, [[Configurable]]: true }.
+includes: [propertyHelper.js]
+---*/
+
+assert.sameValue(Array.isArray.name, "isArray", 'The value of Array.isArray.name is expected to be "isArray"');
+
+verifyNotEnumerable(Array.isArray, "name");
+verifyNotWritable(Array.isArray, "name");
+verifyConfigurable(Array.isArray, "name");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/isArray/not-a-constructor.js b/js/src/tests/test262/built-ins/Array/isArray/not-a-constructor.js
new file mode 100644
index 0000000000..a72b1eb23e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/isArray/not-a-constructor.js
@@ -0,0 +1,31 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Array.isArray does not implement [[Construct]], is not new-able
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+
+  sec-evaluatenew
+
+  ...
+  7. If IsConstructor(constructor) is false, throw a TypeError exception.
+  ...
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(isConstructor(Array.isArray), false, 'isConstructor(Array.isArray) must return false');
+
+assert.throws(TypeError, () => {
+  new Array.isArray([]);
+}, 'new Array.isArray([]) throws a TypeError exception');
+
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/isArray/proxy-revoked.js b/js/src/tests/test262/built-ins/Array/isArray/proxy-revoked.js
new file mode 100644
index 0000000000..5808591738
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/isArray/proxy-revoked.js
@@ -0,0 +1,30 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.isarray
+es6id: 22.1.2.2
+description: Revoked proxy value produces a TypeError
+info: |
+  1. Return IsArray(arg).
+
+  7.2.2 IsArray
+
+  [...]
+  3. If argument is a Proxy exotic object, then
+     a. If the value of the [[ProxyHandler]] internal slot of argument is null,
+        throw a TypeError exception.
+     b. Let target be the value of the [[ProxyTarget]] internal slot of
+        argument.
+     c. Return ? IsArray(target).
+features: [Proxy]
+---*/
+
+var handle = Proxy.revocable([], {});
+
+handle.revoke();
+
+assert.throws(TypeError, function() {
+  Array.isArray(handle.proxy);
+}, 'Array.isArray(handle.proxy) throws a TypeError exception');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/isArray/proxy.js b/js/src/tests/test262/built-ins/Array/isArray/proxy.js
new file mode 100644
index 0000000000..fd369e07d1
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/isArray/proxy.js
@@ -0,0 +1,32 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.isarray
+es6id: 22.1.2.2
+description: Proxy of an array is treated as an array
+info: |
+  1. Return IsArray(arg).
+
+  7.2.2 IsArray
+
+  [...]
+  3. If argument is a Proxy exotic object, then
+     a. If the value of the [[ProxyHandler]] internal slot of argument is null,
+        throw a TypeError exception.
+     b. Let target be the value of the [[ProxyTarget]] internal slot of
+        argument.
+     c. Return ? IsArray(target).
+features: [Proxy]
+---*/
+
+var objectProxy = new Proxy({}, {});
+var arrayProxy = new Proxy([], {});
+var arrayProxyProxy = new Proxy(arrayProxy, {});
+
+assert.sameValue(Array.isArray(objectProxy), false, 'Array.isArray(new Proxy({}, {})) must return false');
+assert.sameValue(Array.isArray(arrayProxy), true, 'Array.isArray(new Proxy([], {})) must return true');
+assert.sameValue(
+  Array.isArray(arrayProxyProxy), true, 'Array.isArray(new Proxy(arrayProxy, {})) must return true'
+);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/isArray/shell.js b/js/src/tests/test262/built-ins/Array/isArray/shell.js
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/js/src/tests/test262/built-ins/Array/length.js b/js/src/tests/test262/built-ins/Array/length.js
new file mode 100644
index 0000000000..16e8c44ec3
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/length.js
@@ -0,0 +1,26 @@
+// Copyright (C) 2017 Leo Balter. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array-constructor
+description: >
+  Array has a "length" property whose value is 1.
+info: |
+  22.1.1 The Array Constructor
+
+  The length property of the Array constructor function is 1.
+  ...
+
+  ES7 section 17: Unless otherwise specified, the length property of a built-in
+  Function object has the attributes { [[Writable]]: false, [[Enumerable]]:
+  false, [[Configurable]]: true }.
+includes: [propertyHelper.js]
+---*/
+
+assert.sameValue(Array.length, 1, 'The value of Array.length is expected to be 1');
+
+verifyNotEnumerable(Array, 'length');
+verifyNotWritable(Array, 'length');
+verifyConfigurable(Array, 'length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/length/15.4.5.1-3.d-1.js b/js/src/tests/test262/built-ins/Array/length/15.4.5.1-3.d-1.js
new file mode 100644
index 0000000000..4cb377f025
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/length/15.4.5.1-3.d-1.js
@@ -0,0 +1,17 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-properties-of-array-instances-length
+es5id: 15.4.5.1-3.d-1
+description: >
+    Throw RangeError if attempt to set array length property to
+    4294967296 (2**32)
+---*/
+
+
+assert.throws(RangeError, function() {
+  [].length = 4294967296;
+}, '[].length = 4294967296 throws a RangeError exception');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/length/15.4.5.1-3.d-2.js b/js/src/tests/test262/built-ins/Array/length/15.4.5.1-3.d-2.js
new file mode 100644
index 0000000000..f899eb15b9
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/length/15.4.5.1-3.d-2.js
@@ -0,0 +1,17 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-properties-of-array-instances-length
+es5id: 15.4.5.1-3.d-2
+description: >
+    Throw RangeError if attempt to set array length property to
+    4294967297 (1+2**32)
+---*/
+
+
+assert.throws(RangeError, function() {
+  [].length = 4294967297;
+}, '[].length = 4294967297 throws a RangeError exception');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/length/15.4.5.1-3.d-3.js b/js/src/tests/test262/built-ins/Array/length/15.4.5.1-3.d-3.js
new file mode 100644
index 0000000000..478e4560a9
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/length/15.4.5.1-3.d-3.js
@@ -0,0 +1,15 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-properties-of-array-instances-length
+es5id: 15.4.5.1-3.d-3
+description: Set array length property to max value 4294967295 (2**32-1,)
+---*/
+
+var a = [];
+a.length = 4294967295;
+
+assert.sameValue(a.length, 4294967295, 'The value of a.length is expected to be 4294967295');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/length/S15.4.2.2_A1.1_T1.js b/js/src/tests/test262/built-ins/Array/length/S15.4.2.2_A1.1_T1.js
new file mode 100644
index 0000000000..c8c9391b08
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/length/S15.4.2.2_A1.1_T1.js
@@ -0,0 +1,20 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array-len
+info: |
+    The [[Prototype]] property of the newly constructed object
+    is set to the original Array prototype object, the one that
+    is the initial value of Array.prototype
+es5id: 15.4.2.2_A1.1_T1
+description: >
+    Create new property of Array.prototype. When new Array object has
+    this property
+---*/
+
+Array.prototype.myproperty = 1;
+var x = new Array(0);
+assert.sameValue(x.myproperty, 1, 'The value of x.myproperty is expected to be 1');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/length/S15.4.2.2_A1.1_T2.js b/js/src/tests/test262/built-ins/Array/length/S15.4.2.2_A1.1_T2.js
new file mode 100644
index 0000000000..b0f1321367
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/length/S15.4.2.2_A1.1_T2.js
@@ -0,0 +1,18 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array-len
+info: |
+    The [[Prototype]] property of the newly constructed object
+    is set to the original Array prototype object, the one that
+    is the initial value of Array.prototype
+es5id: 15.4.2.2_A1.1_T2
+description: Array.prototype.toString = Object.prototype.toString
+---*/
+
+Array.prototype.toString = Object.prototype.toString;
+var x = new Array(0);
+assert.sameValue(x.toString(), "[object Array]", 'x.toString() must return "[object Array]"');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/length/S15.4.2.2_A1.1_T3.js b/js/src/tests/test262/built-ins/Array/length/S15.4.2.2_A1.1_T3.js
new file mode 100644
index 0000000000..4fcb4cfc76
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/length/S15.4.2.2_A1.1_T3.js
@@ -0,0 +1,20 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array-len
+info: |
+    The [[Prototype]] property of the newly constructed object
+    is set to the original Array prototype object, the one that
+    is the initial value of Array.prototype
+es5id: 15.4.2.2_A1.1_T3
+description: Checking use isPrototypeOf
+---*/
+
+assert.sameValue(
+  Array.prototype.isPrototypeOf(new Array(0)),
+  true,
+  'Array.prototype.isPrototypeOf(new Array(0)) must return true'
+);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/length/S15.4.2.2_A1.2_T1.js b/js/src/tests/test262/built-ins/Array/length/S15.4.2.2_A1.2_T1.js
new file mode 100644
index 0000000000..1e6c52e8cd
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/length/S15.4.2.2_A1.2_T1.js
@@ -0,0 +1,14 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array-len
+info: The [[Class]] property of the newly constructed object is set to "Array"
+es5id: 15.4.2.2_A1.2_T1
+description: Checking use Object.prototype.toString
+---*/
+
+var x = new Array(0);
+assert.sameValue(Object.prototype.toString.call(x), "[object Array]", 'Object.prototype.toString.call(new Array(0)) must return "[object Array]"');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/length/S15.4.2.2_A2.1_T1.js b/js/src/tests/test262/built-ins/Array/length/S15.4.2.2_A2.1_T1.js
new file mode 100644
index 0000000000..da22b03edc
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/length/S15.4.2.2_A2.1_T1.js
@@ -0,0 +1,22 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array-len
+info: |
+    If the argument len is a Number and ToUint32(len) is equal to len,
+    then the length property of the newly constructed object is set to ToUint32(len)
+es5id: 15.4.2.2_A2.1_T1
+description: Array constructor is given one argument
+---*/
+
+var x = new Array(0);
+assert.sameValue(x.length, 0, 'The value of x.length is expected to be 0');
+
+var x = new Array(1);
+assert.sameValue(x.length, 1, 'The value of x.length is expected to be 1');
+
+var x = new Array(4294967295);
+assert.sameValue(x.length, 4294967295, 'The value of x.length is expected to be 4294967295');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/length/S15.4.2.2_A2.2_T1.js b/js/src/tests/test262/built-ins/Array/length/S15.4.2.2_A2.2_T1.js
new file mode 100644
index 0000000000..87243a739e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/length/S15.4.2.2_A2.2_T1.js
@@ -0,0 +1,46 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array-len
+info: |
+    If the argument len is a Number and ToUint32(len) is not equal to len,
+    a RangeError exception is thrown
+es5id: 15.4.2.2_A2.2_T1
+description: Use try statement. len = -1, 4294967296, 4294967297
+---*/
+
+try {
+  new Array(-1);
+  throw new Test262Error('#1.1: new Array(-1) throw RangeError. Actual: ' + (new Array(-1)));
+} catch (e) {
+  assert.sameValue(
+    e instanceof RangeError,
+    true,
+    'The result of evaluating (e instanceof RangeError) is expected to be true'
+  );
+}
+
+try {
+  new Array(4294967296);
+  throw new Test262Error('#2.1: new Array(4294967296) throw RangeError. Actual: ' + (new Array(4294967296)));
+} catch (e) {
+  assert.sameValue(
+    e instanceof RangeError,
+    true,
+    'The result of evaluating (e instanceof RangeError) is expected to be true'
+  );
+}
+
+try {
+  new Array(4294967297);
+  throw new Test262Error('#3.1: new Array(4294967297) throw RangeError. Actual: ' + (new Array(4294967297)));
+} catch (e) {
+  assert.sameValue(
+    e instanceof RangeError,
+    true,
+    'The result of evaluating (e instanceof RangeError) is expected to be true'
+  );
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/length/S15.4.2.2_A2.2_T2.js b/js/src/tests/test262/built-ins/Array/length/S15.4.2.2_A2.2_T2.js
new file mode 100644
index 0000000000..9785dccba0
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/length/S15.4.2.2_A2.2_T2.js
@@ -0,0 +1,46 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array-len
+info: |
+    If the argument len is a Number and ToUint32(len) is not equal to len,
+    a RangeError exception is thrown
+es5id: 15.4.2.2_A2.2_T2
+description: Use try statement. len = NaN, +/-Infinity
+---*/
+
+try {
+  new Array(NaN);
+  throw new Test262Error('#1.1: new Array(NaN) throw RangeError. Actual: ' + (new Array(NaN)));
+} catch (e) {
+  assert.sameValue(
+    e instanceof RangeError,
+    true,
+    'The result of evaluating (e instanceof RangeError) is expected to be true'
+  );
+}
+
+try {
+  new Array(Number.POSITIVE_INFINITY);
+  throw new Test262Error('#2.1: new Array(Number.POSITIVE_INFINITY) throw RangeError. Actual: ' + (new Array(Number.POSITIVE_INFINITY)));
+} catch (e) {
+  assert.sameValue(
+    e instanceof RangeError,
+    true,
+    'The result of evaluating (e instanceof RangeError) is expected to be true'
+  );
+}
+
+try {
+  new Array(Number.NEGATIVE_INFINITY);
+  throw new Test262Error('#3.1: new Array(Number.NEGATIVE_INFINITY) throw RangeError. Actual: ' + (new Array(Number.NEGATIVE_INFINITY)));
+} catch (e) {
+  assert.sameValue(
+    e instanceof RangeError,
+    true,
+    'The result of evaluating (e instanceof RangeError) is expected to be true'
+  );
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/length/S15.4.2.2_A2.2_T3.js b/js/src/tests/test262/built-ins/Array/length/S15.4.2.2_A2.2_T3.js
new file mode 100644
index 0000000000..4acedfcaa0
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/length/S15.4.2.2_A2.2_T3.js
@@ -0,0 +1,46 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array-len
+info: |
+    If the argument len is a Number and ToUint32(len) is not equal to len,
+    a RangeError exception is thrown
+es5id: 15.4.2.2_A2.2_T3
+description: Use try statement. len = 1.5, Number.MAX_VALUE, Number.MIN_VALUE
+---*/
+
+try {
+  new Array(1.5);
+  throw new Test262Error('#1.1: new Array(1.5) throw RangeError. Actual: ' + (new Array(1.5)));
+} catch (e) {
+  assert.sameValue(
+    e instanceof RangeError,
+    true,
+    'The result of evaluating (e instanceof RangeError) is expected to be true'
+  );
+}
+
+try {
+  new Array(Number.MAX_VALUE);
+  throw new Test262Error('#2.1: new Array(Number.MAX_VALUE) throw RangeError. Actual: ' + (new Array(Number.MAX_VALUE)));
+} catch (e) {
+  assert.sameValue(
+    e instanceof RangeError,
+    true,
+    'The result of evaluating (e instanceof RangeError) is expected to be true'
+  );
+}
+
+try {
+  new Array(Number.MIN_VALUE);
+  throw new Test262Error('#3.1: new Array(Number.MIN_VALUE) throw RangeError. Actual: ' + (new Array(Number.MIN_VALUE)));
+} catch (e) {
+  assert.sameValue(
+    e instanceof RangeError,
+    true,
+    'The result of evaluating (e instanceof RangeError) is expected to be true'
+  );
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/length/S15.4.2.2_A2.3_T1.js b/js/src/tests/test262/built-ins/Array/length/S15.4.2.2_A2.3_T1.js
new file mode 100644
index 0000000000..739b4b7537
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/length/S15.4.2.2_A2.3_T1.js
@@ -0,0 +1,24 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array-len
+info: |
+    If the argument len is not a Number, then the length property of
+    the newly constructed object is set to 1 and the 0 property of
+    the newly constructed object is set to len
+es5id: 15.4.2.2_A2.3_T1
+description: Checking for null and undefined
+---*/
+
+var x = new Array(null);
+
+assert.sameValue(x.length, 1, 'The value of x.length is expected to be 1');
+assert.sameValue(x[0], null, 'The value of x[0] is expected to be null');
+
+var x = new Array(undefined);
+
+assert.sameValue(x.length, 1, 'The value of x.length is expected to be 1');
+assert.sameValue(x[0], undefined, 'The value of x[0] is expected to equal undefined');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/length/S15.4.2.2_A2.3_T2.js b/js/src/tests/test262/built-ins/Array/length/S15.4.2.2_A2.3_T2.js
new file mode 100644
index 0000000000..7f264fcd04
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/length/S15.4.2.2_A2.3_T2.js
@@ -0,0 +1,25 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array-len
+info: |
+    If the argument len is not a Number, then the length property of
+    the newly constructed object is set to 1 and the 0 property of
+    the newly constructed object is set to len
+es5id: 15.4.2.2_A2.3_T2
+description: Checking for boolean primitive and Boolean object
+---*/
+
+var x = new Array(true);
+
+assert.sameValue(x.length, 1, 'The value of x.length is expected to be 1');
+assert.sameValue(x[0], true, 'The value of x[0] is expected to be true');
+
+var obj = new Boolean(false);
+var x = new Array(obj);
+
+assert.sameValue(x.length, 1, 'The value of x.length is expected to be 1');
+assert.sameValue(x[0], obj, 'The value of x[0] is expected to equal the value of obj');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/length/S15.4.2.2_A2.3_T3.js b/js/src/tests/test262/built-ins/Array/length/S15.4.2.2_A2.3_T3.js
new file mode 100644
index 0000000000..4e9b4ebcdc
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/length/S15.4.2.2_A2.3_T3.js
@@ -0,0 +1,25 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array-len
+info: |
+    If the argument len is not a Number, then the length property of
+    the newly constructed object is set to 1 and the 0 property of
+    the newly constructed object is set to len
+es5id: 15.4.2.2_A2.3_T3
+description: Checking for boolean primitive and Boolean object
+---*/
+
+var x = new Array("1");
+
+assert.sameValue(x.length, 1, 'The value of x.length is expected to be 1');
+assert.sameValue(x[0], "1", 'The value of x[0] is expected to be "1"');
+
+var obj = new String("0");
+var x = new Array(obj);
+
+assert.sameValue(x.length, 1, 'The value of x.length is expected to be 1');
+assert.sameValue(x[0], obj, 'The value of x[0] is expected to equal the value of obj');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/length/S15.4.2.2_A2.3_T4.js b/js/src/tests/test262/built-ins/Array/length/S15.4.2.2_A2.3_T4.js
new file mode 100644
index 0000000000..9bc3350428
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/length/S15.4.2.2_A2.3_T4.js
@@ -0,0 +1,32 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array-len
+info: |
+    If the argument len is not a Number, then the length property of
+    the newly constructed object is set to 1 and the 0 property of
+    the newly constructed object is set to len
+es5id: 15.4.2.2_A2.3_T4
+description: Checking for Number object
+---*/
+
+var obj = new Number(0);
+var x = new Array(obj);
+
+assert.sameValue(x.length, 1, 'The value of x.length is expected to be 1');
+assert.sameValue(x[0], obj, 'The value of x[0] is expected to equal the value of obj');
+
+var obj = new Number(1);
+var x = new Array(obj);
+
+assert.sameValue(x.length, 1, 'The value of x.length is expected to be 1');
+assert.sameValue(x[0], obj, 'The value of x[0] is expected to equal the value of obj');
+
+var obj = new Number(4294967295);
+var x = new Array(obj);
+
+assert.sameValue(x.length, 1, 'The value of x.length is expected to be 1');
+assert.sameValue(x[0], obj, 'The value of x[0] is expected to equal the value of obj');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/length/S15.4.2.2_A2.3_T5.js b/js/src/tests/test262/built-ins/Array/length/S15.4.2.2_A2.3_T5.js
new file mode 100644
index 0000000000..fa903f1b4c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/length/S15.4.2.2_A2.3_T5.js
@@ -0,0 +1,32 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array-len
+info: |
+    If the argument len is not a Number, then the length property of
+    the newly constructed object is set to 1 and the 0 property of
+    the newly constructed object is set to len
+es5id: 15.4.2.2_A2.3_T5
+description: Checking for Number object
+---*/
+
+var obj = new Number(-1);
+var x = new Array(obj);
+
+assert.sameValue(x.length, 1, 'The value of x.length is expected to be 1');
+assert.sameValue(x[0], obj, 'The value of x[0] is expected to equal the value of obj');
+
+var obj = new Number(4294967296);
+var x = new Array(obj);
+
+assert.sameValue(x.length, 1, 'The value of x.length is expected to be 1');
+assert.sameValue(x[0], obj, 'The value of x[0] is expected to equal the value of obj');
+
+var obj = new Number(4294967297);
+var x = new Array(obj);
+
+assert.sameValue(x.length, 1, 'The value of x.length is expected to be 1');
+assert.sameValue(x[0], obj, 'The value of x[0] is expected to equal the value of obj');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/length/S15.4.4_A1.3_T1.js b/js/src/tests/test262/built-ins/Array/length/S15.4.4_A1.3_T1.js
new file mode 100644
index 0000000000..69898b7381
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/length/S15.4.4_A1.3_T1.js
@@ -0,0 +1,13 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-properties-of-the-array-prototype-object
+info: Array prototype object has a length property
+es5id: 15.4.4_A1.3_T1
+description: Array.prototype.length === 0
+---*/
+
+assert.sameValue(Array.prototype.length, 0, 'The value of Array.prototype.length is expected to be 0');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/length/S15.4.5.1_A1.1_T1.js b/js/src/tests/test262/built-ins/Array/length/S15.4.5.1_A1.1_T1.js
new file mode 100644
index 0000000000..771311678c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/length/S15.4.5.1_A1.1_T1.js
@@ -0,0 +1,47 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array-exotic-objects-defineownproperty-p-desc
+info: If ToUint32(length) !== ToNumber(length), throw RangeError
+es5id: 15.4.5.1_A1.1_T1
+description: length in [4294967296, -1, 1.5]
+---*/
+
+try {
+  var x = [];
+  x.length = 4294967296;
+  throw new Test262Error('#1.1: x = []; x.length = 4294967296 throw RangeError. Actual: x.length === ' + (x.length));
+} catch (e) {
+  assert.sameValue(
+    e instanceof RangeError,
+    true,
+    'The result of evaluating (e instanceof RangeError) is expected to be true'
+  );
+}
+
+try {
+  x = [];
+  x.length = -1;
+  throw new Test262Error('#2.1: x = []; x.length = -1 throw RangeError. Actual: x.length === ' + (x.length));
+} catch (e) {
+  assert.sameValue(
+    e instanceof RangeError,
+    true,
+    'The result of evaluating (e instanceof RangeError) is expected to be true'
+  );
+}
+
+try {
+  x = [];
+  x.length = 1.5;
+  throw new Test262Error('#3.1: x = []; x.length = 1.5 throw RangeError. Actual: x.length === ' + (x.length));
+} catch (e) {
+  assert.sameValue(
+    e instanceof RangeError,
+    true,
+    'The result of evaluating (e instanceof RangeError) is expected to be true'
+  );
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/length/S15.4.5.1_A1.1_T2.js b/js/src/tests/test262/built-ins/Array/length/S15.4.5.1_A1.1_T2.js
new file mode 100644
index 0000000000..283049dbe4
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/length/S15.4.5.1_A1.1_T2.js
@@ -0,0 +1,59 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array-exotic-objects-defineownproperty-p-desc
+info: If ToUint32(length) !== ToNumber(length), throw RangeError
+es5id: 15.4.5.1_A1.1_T2
+description: length in [NaN, Infinity, -Infinity, undefined]
+---*/
+
+try {
+  var x = [];
+  x.length = NaN;
+  throw new Test262Error('#1.1: x = []; x.length = NaN throw RangeError. Actual: x.length === ' + (x.length));
+} catch (e) {
+  assert.sameValue(
+    e instanceof RangeError,
+    true,
+    'The result of evaluating (e instanceof RangeError) is expected to be true'
+  );
+}
+
+try {
+  x = [];
+  x.length = Number.POSITIVE_INFINITY;
+  throw new Test262Error('#2.1: x = []; x.length = Number.POSITIVE_INFINITY throw RangeError. Actual: x.length === ' + (x.length));
+} catch (e) {
+  assert.sameValue(
+    e instanceof RangeError,
+    true,
+    'The result of evaluating (e instanceof RangeError) is expected to be true'
+  );
+}
+
+try {
+  x = [];
+  x.length = Number.NEGATIVE_INFINITY;
+  throw new Test262Error('#3.1: x = []; x.length = Number.NEGATIVE_INFINITY throw RangeError. Actual: x.length === ' + (x.length));
+} catch (e) {
+  assert.sameValue(
+    e instanceof RangeError,
+    true,
+    'The result of evaluating (e instanceof RangeError) is expected to be true'
+  );
+}
+
+try {
+  x = [];
+  x.length = undefined;
+  throw new Test262Error('#4.1: x = []; x.length = undefined throw RangeError. Actual: x.length === ' + (x.length));
+} catch (e) {
+  assert.sameValue(
+    e instanceof RangeError,
+    true,
+    'The result of evaluating (e instanceof RangeError) is expected to be true'
+  );
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/length/S15.4.5.1_A1.2_T1.js b/js/src/tests/test262/built-ins/Array/length/S15.4.5.1_A1.2_T1.js
new file mode 100644
index 0000000000..9084747cae
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/length/S15.4.5.1_A1.2_T1.js
@@ -0,0 +1,23 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array-exotic-objects-defineownproperty-p-desc
+info: |
+    For every integer k that is less than the value of
+    the length property of A but not less than ToUint32(length),
+    if A itself has a property (not an inherited property) named ToString(k),
+    then delete that property
+es5id: 15.4.5.1_A1.2_T1
+description: Change length of array
+---*/
+
+var x = [0, , 2, , 4];
+x.length = 4;
+assert.sameValue(x[4], undefined, 'The value of x[4] is expected to equal undefined');
+
+x.length = 3;
+assert.sameValue(x[3], undefined, 'The value of x[3] is expected to equal undefined');
+assert.sameValue(x[2], 2, 'The value of x[2] is expected to be 2');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/length/S15.4.5.1_A1.2_T3.js b/js/src/tests/test262/built-ins/Array/length/S15.4.5.1_A1.2_T3.js
new file mode 100644
index 0000000000..1d3d0b9911
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/length/S15.4.5.1_A1.2_T3.js
@@ -0,0 +1,23 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array-exotic-objects-defineownproperty-p-desc
+info: |
+    For every integer k that is less than the value of
+    the length property of A but not less than ToUint32(length),
+    if A itself has a property (not an inherited property) named ToString(k),
+    then delete that property
+es5id: 15.4.5.1_A1.2_T3
+description: Checking an inherited property
+---*/
+
+Array.prototype[2] = 2;
+var x = [0, 1];
+x.length = 3;
+assert.sameValue(x.hasOwnProperty('2'), false, 'x.hasOwnProperty("2") must return false');
+
+x.length = 2;
+assert.sameValue(x[2], 2, 'The value of x[2] is expected to be 2');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/length/S15.4.5.1_A1.3_T1.js b/js/src/tests/test262/built-ins/Array/length/S15.4.5.1_A1.3_T1.js
new file mode 100644
index 0000000000..711cd65564
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/length/S15.4.5.1_A1.3_T1.js
@@ -0,0 +1,35 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array-exotic-objects-defineownproperty-p-desc
+info: Set the value of property length of A to Uint32(length)
+es5id: 15.4.5.1_A1.3_T1
+description: length is object or primitve
+---*/
+
+var x = [];
+x.length = true;
+assert.sameValue(x.length, 1, 'The value of x.length is expected to be 1');
+
+x = [0];
+x.length = null;
+assert.sameValue(x.length, 0, 'The value of x.length is expected to be 0');
+
+x = [0];
+x.length = new Boolean(false);
+assert.sameValue(x.length, 0, 'The value of x.length is expected to be 0');
+
+x = [];
+x.length = new Number(1);
+assert.sameValue(x.length, 1, 'The value of x.length is expected to be 1');
+
+x = [];
+x.length = "1";
+assert.sameValue(x.length, 1, 'The value of x.length is expected to be 1');
+
+x = [];
+x.length = new String("1");
+assert.sameValue(x.length, 1, 'The value of x.length is expected to be 1');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/length/S15.4.5.1_A1.3_T2.js b/js/src/tests/test262/built-ins/Array/length/S15.4.5.1_A1.3_T2.js
new file mode 100644
index 0000000000..c1b163c560
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/length/S15.4.5.1_A1.3_T2.js
@@ -0,0 +1,114 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array-exotic-objects-defineownproperty-p-desc
+info: Set the value of property length of A to Uint32(length)
+es5id: 15.4.5.1_A1.3_T2
+description: Uint32 use ToNumber and ToPrimitve
+---*/
+
+var x = [];
+x.length = {
+  valueOf: function() {
+    return 2
+  }
+};
+assert.sameValue(x.length, 2, 'The value of x.length is expected to be 2');
+
+x = [];
+x.length = {
+  valueOf: function() {
+    return 2
+  },
+  toString: function() {
+    return 1
+  }
+};
+assert.sameValue(x.length, 2, 'The value of x.length is expected to be 2');
+
+x = [];
+x.length = {
+  valueOf: function() {
+    return 2
+  },
+  toString: function() {
+    return {}
+  }
+};
+assert.sameValue(x.length, 2, 'The value of x.length is expected to be 2');
+
+try {
+  x = [];
+  x.length = {
+    valueOf: function() {
+      return 2
+    },
+    toString: function() {
+      throw "error"
+    }
+  };
+  assert.sameValue(x.length, 2, 'The value of x.length is expected to be 2');
+}
+catch (e) {
+  assert.notSameValue(e, "error", 'The value of e is not "error"');
+}
+
+x = [];
+x.length = {
+  toString: function() {
+    return 1
+  }
+};
+assert.sameValue(x.length, 1, 'The value of x.length is expected to be 1');
+
+x = [];
+x.length = {
+  valueOf: function() {
+    return {}
+  },
+  toString: function() {
+    return 1
+  }
+}
+assert.sameValue(x.length, 1, 'The value of x.length is expected to be 1');
+
+try {
+  x = [];
+  x.length = {
+    valueOf: function() {
+      throw "error"
+    },
+    toString: function() {
+      return 1
+    }
+  };
+  x.length;
+  throw new Test262Error('#7.1: x = []; x.length = {valueOf: function() {throw "error"}, toString: function() {return 1}}; x.length throw "error". Actual: ' + (x.length));
+}
+catch (e) {
+  assert.sameValue(e, "error", 'The value of e is expected to be "error"');
+}
+
+try {
+  x = [];
+  x.length = {
+    valueOf: function() {
+      return {}
+    },
+    toString: function() {
+      return {}
+    }
+  };
+  x.length;
+  throw new Test262Error('#8.1: x = []; x.length = {valueOf: function() {return {}}, toString: function() {return {}}}  x.length throw TypeError. Actual: ' + (x.length));
+}
+catch (e) {
+  assert.sameValue(
+    e instanceof TypeError,
+    true,
+    'The result of evaluating (e instanceof TypeError) is expected to be true'
+  );
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/length/S15.4.5.2_A3_T4.js b/js/src/tests/test262/built-ins/Array/length/S15.4.5.2_A3_T4.js
new file mode 100644
index 0000000000..a073a7a0ef
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/length/S15.4.5.2_A3_T4.js
@@ -0,0 +1,24 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-properties-of-array-instances-length
+info: |
+    If the length property is changed, every property whose name
+    is an array index whose value is not smaller than the new length is automatically deleted
+es5id: 15.4.5.2_A3_T4
+description: >
+    If new length greater than the name of every property whose name
+    is an array index
+---*/
+
+var x = [0, 1, 2];
+x[4294967294] = 4294967294;
+x.length = 2;
+
+assert.sameValue(x[0], 0, 'The value of x[0] is expected to be 0');
+assert.sameValue(x[1], 1, 'The value of x[1] is expected to be 1');
+assert.sameValue(x[2], undefined, 'The value of x[2] is expected to equal undefined');
+assert.sameValue(x[4294967294], undefined, 'The value of x[4294967294] is expected to equal undefined');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/length/browser.js b/js/src/tests/test262/built-ins/Array/length/browser.js
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/js/src/tests/test262/built-ins/Array/length/define-own-prop-length-coercion-order-set.js b/js/src/tests/test262/built-ins/Array/length/define-own-prop-length-coercion-order-set.js
new file mode 100644
index 0000000000..bb3acea2e2
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/length/define-own-prop-length-coercion-order-set.js
@@ -0,0 +1,48 @@
+// Copyright (C) 2020 Alexey Shvayka. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+author: André Bargull
+esid: sec-arraysetlength
+description: >
+  [[Value]] is coerced to number before current descriptor's [[Writable]] check.
+info: |
+  ArraySetLength ( A, Desc )
+
+  [...]
+  3. Let newLen be ? ToUint32(Desc.[[Value]]).
+  4. Let numberLen be ? ToNumber(Desc.[[Value]]).
+  [...]
+  7. Let oldLenDesc be OrdinaryGetOwnProperty(A, "length").
+  [...]
+  12. If oldLenDesc.[[Writable]] is false, return false.
+features: [Symbol, Symbol.toPrimitive, Reflect, Reflect.set]
+includes: [compareArray.js]
+---*/
+
+var array = [1, 2, 3];
+var hints = [];
+var length = {};
+length[Symbol.toPrimitive] = function(hint) {
+  hints.push(hint);
+  Object.defineProperty(array, "length", {writable: false});
+  return 0;
+};
+
+assert.throws(TypeError, function() {
+  "use strict";
+  array.length = length;
+}, '`"use strict"; array.length = length` throws a TypeError exception');
+assert.compareArray(hints, ["number", "number"], 'The value of hints is expected to be ["number", "number"]');
+
+
+array = [1, 2, 3];
+hints = [];
+
+assert(
+  !Reflect.set(array, "length", length),
+  'The value of !Reflect.set(array, "length", length) is expected to be true'
+);
+assert.compareArray(hints, ["number", "number"], 'The value of hints is expected to be ["number", "number"]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/length/define-own-prop-length-coercion-order.js b/js/src/tests/test262/built-ins/Array/length/define-own-prop-length-coercion-order.js
new file mode 100644
index 0000000000..8c0f7a97a8
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/length/define-own-prop-length-coercion-order.js
@@ -0,0 +1,63 @@
+// Copyright (C) 2020 Alexey Shvayka. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+author: André Bargull
+esid: sec-arraysetlength
+description: >
+  [[Value]] is coerced to number before descriptor validation.
+info: |
+  ArraySetLength ( A, Desc )
+
+  [...]
+  3. Let newLen be ? ToUint32(Desc.[[Value]]).
+  4. Let numberLen be ? ToNumber(Desc.[[Value]]).
+  [...]
+  7. Let oldLenDesc be OrdinaryGetOwnProperty(A, "length").
+  [...]
+  11. If newLen ≥ oldLen, then
+    a. Return OrdinaryDefineOwnProperty(A, "length", newLenDesc).
+
+  OrdinaryDefineOwnProperty ( O, P, Desc )
+
+  [...]
+  3. Return ValidateAndApplyPropertyDescriptor(O, P, extensible, Desc, current).
+
+  ValidateAndApplyPropertyDescriptor ( O, P, extensible, Desc, current )
+
+  [...]
+  7. Else if IsDataDescriptor(current) and IsDataDescriptor(Desc) are both true, then
+    a. If current.[[Configurable]] is false and current.[[Writable]] is false, then
+      i. If Desc.[[Writable]] is present and Desc.[[Writable]] is true, return false.
+features: [Reflect]
+---*/
+
+var array = [1, 2];
+var valueOfCalls = 0;
+var length = {
+  valueOf: function() {
+    valueOfCalls += 1;
+    if (valueOfCalls !== 1) {
+      // skip first coercion at step 3
+      Object.defineProperty(array, "length", {writable: false});
+    }
+    return array.length;
+  },
+};
+
+assert.throws(TypeError, function() {
+  Object.defineProperty(array, "length", {value: length, writable: true});
+}, 'Object.defineProperty(array, "length", {value: length, writable: true}) throws a TypeError exception');
+assert.sameValue(valueOfCalls, 2, 'The value of valueOfCalls is expected to be 2');
+
+
+array = [1, 2];
+valueOfCalls = 0;
+
+assert(
+  !Reflect.defineProperty(array, "length", {value: length, writable: true}),
+  'The value of !Reflect.defineProperty(array, "length", {value: length, writable: true}) is expected to be true'
+);
+assert.sameValue(valueOfCalls, 2, 'The value of valueOfCalls is expected to be 2');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/length/define-own-prop-length-error.js b/js/src/tests/test262/built-ins/Array/length/define-own-prop-length-error.js
new file mode 100644
index 0000000000..a3122b43c6
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/length/define-own-prop-length-error.js
@@ -0,0 +1,26 @@
+// Copyright (C) 2023 Jordan Harband. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+author: Jordan Harband
+esid: sec-arraysetlength
+description: >
+  Setting an invalid array length throws a RangeError
+info: |
+  ArraySetLength ( A, Desc )
+
+  [...]
+  5. If SameValueZero(newLen, numberLen) is false, throw a RangeError exception.
+  [...]
+---*/
+
+assert.throws(RangeError, function () {
+  Object.defineProperty([], 'length', { value: -1, configurable: true });
+});
+
+assert.throws(RangeError, function () {
+  // the string is intentionally "computed" here to ensure there are no optimization bugs
+  Object.defineProperty([], 'len' + 'gth', { value: -1, configurable: true });
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/length/define-own-prop-length-no-value-order.js b/js/src/tests/test262/built-ins/Array/length/define-own-prop-length-no-value-order.js
new file mode 100644
index 0000000000..790a2705fe
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/length/define-own-prop-length-no-value-order.js
@@ -0,0 +1,64 @@
+// Copyright (C) 2020 Alexey Shvayka. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-arraysetlength
+description: >
+  Ordinary descriptor validation if [[Value]] is absent.
+info: |
+  ArraySetLength ( A, Desc )
+
+  1. If Desc.[[Value]] is absent, then
+    a. Return OrdinaryDefineOwnProperty(A, "length", Desc).
+
+  OrdinaryDefineOwnProperty ( O, P, Desc )
+
+  [...]
+  3. Return ValidateAndApplyPropertyDescriptor(O, P, extensible, Desc, current).
+
+  ValidateAndApplyPropertyDescriptor ( O, P, extensible, Desc, current )
+
+  [...]
+  4. If current.[[Configurable]] is false, then
+    a. If Desc.[[Configurable]] is present and its value is true, return false.
+    b. If Desc.[[Enumerable]] is present and
+      ! SameValue(Desc.[[Enumerable]], current.[[Enumerable]]) is false, return false.
+  [...]
+  6. Else if ! SameValue(! IsDataDescriptor(current), ! IsDataDescriptor(Desc)) is false, then
+    a. If current.[[Configurable]] is false, return false.
+  [...]
+  7. Else if IsDataDescriptor(current) and IsDataDescriptor(Desc) are both true, then
+    a. If current.[[Configurable]] is false and current.[[Writable]] is false, then
+      i. If Desc.[[Writable]] is present and Desc.[[Writable]] is true, return false.
+features: [Reflect]
+---*/
+
+assert.throws(TypeError, function() {
+  Object.defineProperty([], "length", {configurable: true});
+}, 'Object.defineProperty([], "length", {configurable: true}) throws a TypeError exception');
+
+assert(
+  !Reflect.defineProperty([], "length", {enumerable: true}),
+  'The value of !Reflect.defineProperty([], "length", {enumerable: true}) is expected to be true'
+);
+
+assert.throws(TypeError, function() {
+  Object.defineProperty([], "length", {
+    get: function() {
+      throw new Test262Error("[[Get]] shouldn't be called");
+    },
+  });
+}, 'Object.defineProperty([], "length", {get: function() {throw new Test262Error("[[Get]] shouldn"t be called");},}) throws a TypeError exception');
+
+assert(
+  !Reflect.defineProperty([], "length", {set: function(_value) {}}),
+  'The value of !Reflect.defineProperty([], "length", {set: function(_value) {}}) is expected to be true'
+);
+
+var array = [];
+Object.defineProperty(array, "length", {writable: false});
+assert.throws(TypeError, function() {
+  Object.defineProperty(array, "length", {writable: true});
+}, 'Object.defineProperty(array, "length", {writable: true}) throws a TypeError exception');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/length/define-own-prop-length-overflow-order.js b/js/src/tests/test262/built-ins/Array/length/define-own-prop-length-overflow-order.js
new file mode 100644
index 0000000000..9cdb0d3860
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/length/define-own-prop-length-overflow-order.js
@@ -0,0 +1,31 @@
+// Copyright (C) 2020 Alexey Shvayka. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-arraysetlength
+description: >
+  [[Value]] is checked for overflow before descriptor validation.
+info: |
+  ArraySetLength ( A, Desc )
+
+  [...]
+  3. Let newLen be ? ToUint32(Desc.[[Value]]).
+  4. Let numberLen be ? ToNumber(Desc.[[Value]]).
+  5. If newLen ≠ numberLen, throw a RangeError exception.
+---*/
+
+assert.throws(RangeError, function() {
+  Object.defineProperty([], "length", {value: -1, configurable: true});
+}, 'Object.defineProperty([], "length", {value: -1, configurable: true}) throws a RangeError exception');
+
+assert.throws(RangeError, function() {
+  Object.defineProperty([], "length", {value: NaN, enumerable: true});
+}, 'Object.defineProperty([], "length", {value: NaN, enumerable: true}) throws a RangeError exception');
+
+var array = [];
+Object.defineProperty(array, "length", {writable: false});
+assert.throws(RangeError, function() {
+  Object.defineProperty(array, "length", {value: Number.MAX_SAFE_INTEGER, writable: true});
+}, 'Object.defineProperty(array, "length", {value: Number.MAX_SAFE_INTEGER, writable: true}) throws a RangeError exception');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/length/define-own-prop-length-overflow-realm.js b/js/src/tests/test262/built-ins/Array/length/define-own-prop-length-overflow-realm.js
new file mode 100644
index 0000000000..67656c5f30
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/length/define-own-prop-length-overflow-realm.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array-exotic-objects-defineownproperty-p-desc
+es6id: 9.4.2.1
+description: >
+  Error when setting a length larger than 2**32 (honoring the Realm of the
+  current execution context)
+info: |
+  [...]
+  2. If P is "length", then
+     a. Return ? ArraySetLength(A, Desc).
+features: [cross-realm]
+---*/
+
+var OArray = $262.createRealm().global.Array;
+var array = new OArray();
+
+assert.throws(RangeError, function() {
+  array.length = 4294967296;
+}, 'array.length = 4294967296 throws a RangeError exception');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/length/shell.js b/js/src/tests/test262/built-ins/Array/length/shell.js
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/js/src/tests/test262/built-ins/Array/name.js b/js/src/tests/test262/built-ins/Array/name.js
new file mode 100644
index 0000000000..621154b510
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/name.js
@@ -0,0 +1,30 @@
+// Copyright (C) 2017 Leo Balter. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array-constructor
+description: >
+  The "name" property of Array
+info: |
+  17 ECMAScript Standard Built-in Objects
+
+  Every built-in Function object, including constructors, that is not
+  identified as an anonymous function has a name property whose value is a
+  String. Unless otherwise specified, this value is the name that is given to
+  the function in this specification.
+
+  [...]
+
+  Unless otherwise specified, the name property of a built-in Function
+  object, if it exists, has the attributes { [[Writable]]: false,
+  [[Enumerable]]: false, [[Configurable]]: true }.
+includes: [propertyHelper.js]
+---*/
+
+assert.sameValue(Array.name, 'Array', 'The value of Array.name is expected to be "Array"');
+
+verifyNotEnumerable(Array, 'name');
+verifyNotWritable(Array, 'name');
+verifyConfigurable(Array, 'name');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/of/browser.js b/js/src/tests/test262/built-ins/Array/of/browser.js
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/js/src/tests/test262/built-ins/Array/of/construct-this-with-the-number-of-arguments.js b/js/src/tests/test262/built-ins/Array/of/construct-this-with-the-number-of-arguments.js
new file mode 100644
index 0000000000..546cb95348
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/of/construct-this-with-the-number-of-arguments.js
@@ -0,0 +1,41 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.of
+es6id: 22.1.2.3
+description: Passes the number of arguments to the constructor it calls.
+info: |
+  Array.of ( ...items )
+
+  1. Let len be the actual number of arguments passed to this function.
+  2. Let items be the List of arguments passed to this function.
+  3. Let C be the this value.
+  4. If IsConstructor(C) is true, then
+    a. Let A be Construct(C, «len»).
+  ...
+---*/
+
+var len;
+var hits = 0;
+
+function C(length) {
+  len = length;
+  hits++;
+}
+
+Array.of.call(C);
+assert.sameValue(len, 0, 'The value of len is expected to be 0');
+assert.sameValue(hits, 1, 'The value of hits is expected to be 1');
+
+Array.of.call(C, 'a', 'b')
+assert.sameValue(len, 2, 'The value of len is expected to be 2');
+assert.sameValue(hits, 2, 'The value of hits is expected to be 2');
+
+Array.of.call(C, false, null, undefined);
+assert.sameValue(
+  len, 3,
+  'The value of len is expected to be 3'
+);
+assert.sameValue(hits, 3, 'The value of hits is expected to be 3');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/of/creates-a-new-array-from-arguments.js b/js/src/tests/test262/built-ins/Array/of/creates-a-new-array-from-arguments.js
new file mode 100644
index 0000000000..09ef45b6da
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/of/creates-a-new-array-from-arguments.js
@@ -0,0 +1,47 @@
+// Copyright (c) 2015 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+/*---
+esid: sec-array.of
+es6id: 22.1.2.3
+description: >
+  Array.of method creates a new Array with a variable number of arguments.
+info: |
+  22.1.2.3 Array.of ( ...items )
+
+  ...
+  7. Let k be 0.
+  8. Repeat, while k < len
+    a. Let kValue be items[k].
+    b. Let Pk be ToString(k).
+    c. Let defineStatus be CreateDataPropertyOrThrow(A,Pk, kValue).
+    d. ReturnIfAbrupt(defineStatus).
+    e. Increase k by 1.
+  9. Let setStatus be Set(A, "length", len, true).
+  10. ReturnIfAbrupt(setStatus).
+  11. Return A.
+---*/
+
+var a1 = Array.of('Mike', 'Rick', 'Leo');
+assert.sameValue(
+  a1.length, 3,
+  'The value of a1.length is expected to be 3'
+);
+assert.sameValue(a1[0], 'Mike', 'The value of a1[0] is expected to be "Mike"');
+assert.sameValue(a1[1], 'Rick', 'The value of a1[1] is expected to be "Rick"');
+assert.sameValue(a1[2], 'Leo', 'The value of a1[2] is expected to be "Leo"');
+
+var a2 = Array.of(undefined, false, null, undefined);
+assert.sameValue(
+  a2.length, 4,
+  'The value of a2.length is expected to be 4'
+);
+assert.sameValue(a2[0], undefined, 'The value of a2[0] is expected to equal undefined');
+assert.sameValue(a2[1], false, 'The value of a2[1] is expected to be false');
+assert.sameValue(a2[2], null, 'The value of a2[2] is expected to be null');
+assert.sameValue(a2[3], undefined, 'The value of a2[3] is expected to equal undefined');
+
+var a3 = Array.of();
+assert.sameValue(a3.length, 0, 'The value of a3.length is expected to be 0');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/of/does-not-use-prototype-properties.js b/js/src/tests/test262/built-ins/Array/of/does-not-use-prototype-properties.js
new file mode 100644
index 0000000000..6f08da1f92
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/of/does-not-use-prototype-properties.js
@@ -0,0 +1,32 @@
+// Copyright (c) 2015 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+/*---
+esid: sec-array.of
+es6id: 22.1.2.3
+description: Array.of does not use prototype properties for arguments.
+info: |
+  It defines elements rather than assigning to them.
+---*/
+
+Object.defineProperty(Array.prototype, "0", {
+  set: function(v) {
+    throw new Test262Error('Should define own properties');
+  }
+});
+
+var arr = Array.of(true);
+assert.sameValue(arr[0], true, 'The value of arr[0] is expected to be true');
+
+function Custom() {}
+
+Object.defineProperty(Custom.prototype, "0", {
+  set: function(v) {
+    throw new Test262Error('Should define own properties');
+  }
+});
+
+var custom = Array.of.call(Custom, true);
+assert.sameValue(custom[0], true, 'The value of custom[0] is expected to be true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/of/does-not-use-set-for-indices.js b/js/src/tests/test262/built-ins/Array/of/does-not-use-set-for-indices.js
new file mode 100644
index 0000000000..7461aef192
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/of/does-not-use-set-for-indices.js
@@ -0,0 +1,38 @@
+// Copyright (C) 2020 Alexey Shvayka. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.of
+description: >
+  Non-writable properties are overwritten by CreateDataProperty.
+  (result object's "0" is non-writable)
+info: |
+  Array.of ( ...items )
+
+  [...]
+  7. Repeat, while k < len
+    [...]
+    c. Perform ? CreateDataPropertyOrThrow(A, Pk, kValue).
+  [...]
+includes: [propertyHelper.js]
+---*/
+
+var A = function(_length) {
+  Object.defineProperty(this, "0", {
+    value: 1,
+    writable: false,
+    enumerable: false,
+    configurable: true,
+  });
+};
+
+var res = Array.of.call(A, 2);
+
+verifyProperty(res, "0", {
+  value: 2,
+  writable: true,
+  enumerable: true,
+  configurable: true,
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/of/length.js b/js/src/tests/test262/built-ins/Array/of/length.js
new file mode 100644
index 0000000000..f77c48b768
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/of/length.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.of
+description: >
+  Array.of.length value and property descriptor
+info: |
+  Array.of ( ...items )
+
+  The length property of the of function is 0.
+includes: [propertyHelper.js]
+---*/
+
+assert.sameValue(
+  Array.of.length, 0,
+  'The value of Array.of.length is expected to be 0'
+);
+
+verifyNotEnumerable(Array.of, 'length');
+verifyNotWritable(Array.of, 'length');
+verifyConfigurable(Array.of, 'length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/of/name.js b/js/src/tests/test262/built-ins/Array/of/name.js
new file mode 100644
index 0000000000..842dd1ad11
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/of/name.js
@@ -0,0 +1,24 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.of
+description: >
+  Array.of.name value and property descriptor
+info: |
+  Array.of ( ...items )
+
+  17 ECMAScript Standard Built-in Objects
+
+includes: [propertyHelper.js]
+---*/
+
+assert.sameValue(
+  Array.of.name, 'of',
+  'The value of Array.of.name is expected to be "of"'
+);
+
+verifyNotEnumerable(Array.of, 'name');
+verifyNotWritable(Array.of, 'name');
+verifyConfigurable(Array.of, 'name');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/of/not-a-constructor.js b/js/src/tests/test262/built-ins/Array/of/not-a-constructor.js
new file mode 100644
index 0000000000..a9f9221010
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/of/not-a-constructor.js
@@ -0,0 +1,31 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Array.of does not implement [[Construct]], is not new-able
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+
+  sec-evaluatenew
+
+  ...
+  7. If IsConstructor(constructor) is false, throw a TypeError exception.
+  ...
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(isConstructor(Array.of), false, 'isConstructor(Array.of) must return false');
+
+assert.throws(TypeError, () => {
+  new Array.of(1);
+}, '`new Array.of(1)` throws a TypeError exception');
+
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/of/of.js b/js/src/tests/test262/built-ins/Array/of/of.js
new file mode 100644
index 0000000000..8dee2737ce
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/of/of.js
@@ -0,0 +1,19 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.of
+description: >
+  Array.of property descriptor
+info: |
+  Array.of ( ...items )
+
+  17 ECMAScript Standard Built-in Objects
+
+includes: [propertyHelper.js]
+---*/
+
+verifyNotEnumerable(Array, 'of');
+verifyWritable(Array, 'of');
+verifyConfigurable(Array, 'of');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/of/proto-from-ctor-realm.js b/js/src/tests/test262/built-ins/Array/of/proto-from-ctor-realm.js
new file mode 100644
index 0000000000..e2bdcca1e6
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/of/proto-from-ctor-realm.js
@@ -0,0 +1,35 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.of
+description: Default [[Prototype]] value derived from realm of the constructor
+info: |
+    [...]
+    4. If IsConstructor(C) is true, then
+       a. Let A be ? Construct(C, « len »).
+    [...]
+
+    9.1.14 GetPrototypeFromConstructor
+
+    [...]
+    3. Let proto be ? Get(constructor, "prototype").
+    4. If Type(proto) is not Object, then
+       a. Let realm be ? GetFunctionRealm(constructor).
+       b. Let proto be realm's intrinsic object named intrinsicDefaultProto.
+    [...]
+features: [cross-realm]
+---*/
+
+var other = $262.createRealm().global;
+var C = new other.Function();
+C.prototype = null;
+
+var a = Array.of.call(C, 1, 2, 3);
+
+assert.sameValue(
+  Object.getPrototypeOf(a),
+  other.Object.prototype,
+  'Object.getPrototypeOf(Array.of.call(C, 1, 2, 3)) returns other.Object.prototype'
+);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/of/return-a-custom-instance.js b/js/src/tests/test262/built-ins/Array/of/return-a-custom-instance.js
new file mode 100644
index 0000000000..88510b9c7d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/of/return-a-custom-instance.js
@@ -0,0 +1,39 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.of
+description: >
+  Returns an instance from a custom constructor.
+info: |
+  Array.of ( ...items )
+
+  ...
+  4. If IsConstructor(C) is true, then
+    a. Let A be Construct(C, «len»).
+  ...
+  11. Return A.
+---*/
+
+function Coop() {}
+
+var coop = Array.of.call(Coop, 'Mike', 'Rick', 'Leo');
+
+assert.sameValue(
+  coop.length, 3,
+  'The value of coop.length is expected to be 3'
+);
+assert.sameValue(
+  coop[0], 'Mike',
+  'The value of coop[0] is expected to be "Mike"'
+);
+assert.sameValue(
+  coop[1], 'Rick',
+  'The value of coop[1] is expected to be "Rick"'
+);
+assert.sameValue(
+  coop[2], 'Leo',
+  'The value of coop[2] is expected to be "Leo"'
+);
+assert(coop instanceof Coop, 'The result of evaluating (coop instanceof Coop) is expected to be true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/of/return-a-new-array-object.js b/js/src/tests/test262/built-ins/Array/of/return-a-new-array-object.js
new file mode 100644
index 0000000000..a344f7aa34
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/of/return-a-new-array-object.js
@@ -0,0 +1,42 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.of
+description: >
+  Returns a new Array.
+info: |
+  Array.of ( ...items )
+
+  1. Let len be the actual number of arguments passed to this function.
+  2. Let items be the List of arguments passed to this function.
+  3. Let C be the this value.
+  4. If IsConstructor(C) is true, then
+    a. Let A be Construct(C, «len»).
+  5. Else,
+    b. Let A be ArrayCreate(len).
+  ...
+  11. Return A.
+---*/
+
+var result = Array.of();
+assert(result instanceof Array, 'The result of evaluating (result instanceof Array) is expected to be true');
+
+result = Array.of.call(undefined);
+assert(
+  result instanceof Array,
+  'The result of evaluating (result instanceof Array) is expected to be true'
+);
+
+result = Array.of.call(Math.cos);
+assert(
+  result instanceof Array,
+  'The result of evaluating (result instanceof Array) is expected to be true'
+);
+
+result = Array.of.call(Math.cos.bind(Math));
+assert(
+  result instanceof Array,
+  'The result of evaluating (result instanceof Array) is expected to be true'
+);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/of/return-abrupt-from-contructor.js b/js/src/tests/test262/built-ins/Array/of/return-abrupt-from-contructor.js
new file mode 100644
index 0000000000..3eee722071
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/of/return-abrupt-from-contructor.js
@@ -0,0 +1,29 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.of
+description: >
+  Return abrupt from this' constructor
+info: |
+  Array.of ( ...items )
+
+  1. Let len be the actual number of arguments passed to this function.
+  2. Let items be the List of arguments passed to this function.
+  3. Let C be the this value.
+  4. If IsConstructor(C) is true, then
+    a. Let A be Construct(C, «len»).
+  5. Else,
+    b. Let A be ArrayCreate(len).
+  6. ReturnIfAbrupt(A).
+  ...
+---*/
+
+function T() {
+  throw new Test262Error();
+}
+
+assert.throws(Test262Error, function() {
+  Array.of.call(T);
+}, 'Array.of.call(T) throws a Test262Error exception');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/of/return-abrupt-from-data-property-using-proxy.js b/js/src/tests/test262/built-ins/Array/of/return-abrupt-from-data-property-using-proxy.js
new file mode 100644
index 0000000000..de60c318dc
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/of/return-abrupt-from-data-property-using-proxy.js
@@ -0,0 +1,40 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.of
+description: >
+  Return abrupt from Data Property creation
+info: |
+  Array.of ( ...items )
+
+  ...
+  7. Let k be 0.
+  8. Repeat, while k < len
+    a. Let kValue be items[k].
+    b. Let Pk be ToString(k).
+    c. Let defineStatus be CreateDataPropertyOrThrow(A,Pk, kValue).
+    d. ReturnIfAbrupt(defineStatus).
+  ...
+
+  7.3.6 CreateDataPropertyOrThrow (O, P, V)
+
+  ...
+  3. Let success be CreateDataProperty(O, P, V).
+  4. ReturnIfAbrupt(success).
+  ...
+features: [Proxy]
+---*/
+
+function T() {
+  return new Proxy({}, {
+    defineProperty: function() {
+      throw new Test262Error();
+    }
+  });
+}
+
+assert.throws(Test262Error, function() {
+  Array.of.call(T, 'Bob');
+}, 'Array.of.call(T, "Bob") throws a Test262Error exception');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/of/return-abrupt-from-data-property.js b/js/src/tests/test262/built-ins/Array/of/return-abrupt-from-data-property.js
new file mode 100644
index 0000000000..de7f8acc75
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/of/return-abrupt-from-data-property.js
@@ -0,0 +1,48 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.of
+description: >
+  Return abrupt from Data Property creation
+info: |
+  Array.of ( ...items )
+
+  ...
+  7. Let k be 0.
+  8. Repeat, while k < len
+    a. Let kValue be items[k].
+    b. Let Pk be ToString(k).
+    c. Let defineStatus be CreateDataPropertyOrThrow(A,Pk, kValue).
+    d. ReturnIfAbrupt(defineStatus).
+  ...
+
+  7.3.6 CreateDataPropertyOrThrow (O, P, V)
+
+  ...
+  3. Let success be CreateDataProperty(O, P, V).
+  4. ReturnIfAbrupt(success).
+  5. If success is false, throw a TypeError exception.
+  ...
+---*/
+
+function T1() {
+  Object.preventExtensions(this);
+}
+
+assert.throws(TypeError, function() {
+  Array.of.call(T1, 'Bob');
+}, 'Array.of.call(T1, "Bob") throws a TypeError exception');
+
+function T2() {
+  Object.defineProperty(this, 0, {
+    configurable: false,
+    writable: true,
+    enumerable: true
+  });
+}
+
+assert.throws(TypeError, function() {
+  Array.of.call(T2, 'Bob');
+}, 'Array.of.call(T2, "Bob") throws a TypeError exception')
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/of/return-abrupt-from-setting-length.js b/js/src/tests/test262/built-ins/Array/of/return-abrupt-from-setting-length.js
new file mode 100644
index 0000000000..f4dd67769f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/of/return-abrupt-from-setting-length.js
@@ -0,0 +1,28 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.of
+description: >
+  Return abrupt from setting the length property.
+info: |
+  Array.of ( ...items )
+
+  ...
+  9. Let setStatus be Set(A, "length", len, true).
+  10. ReturnIfAbrupt(setStatus).
+  ...
+---*/
+
+function T() {
+  Object.defineProperty(this, 'length', {
+    set: function() {
+      throw new Test262Error();
+    }
+  });
+}
+
+assert.throws(Test262Error, function() {
+  Array.of.call(T);
+}, 'Array.of.call(T) throws a Test262Error exception');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/of/sets-length.js b/js/src/tests/test262/built-ins/Array/of/sets-length.js
new file mode 100644
index 0000000000..2b651a4068
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/of/sets-length.js
@@ -0,0 +1,38 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.of
+description: >
+  Calls the length setter if available
+info: |
+  Array.of ( ...items )
+
+  ...
+  9. Let setStatus be Set(A, "length", len, true).
+  ...
+---*/
+
+var hits = 0;
+var value;
+var _this_;
+
+function Pack() {
+  Object.defineProperty(this, "length", {
+    set: function(len) {
+      hits++;
+      value = len;
+      _this_ = this;
+    }
+  });
+}
+
+var result = Array.of.call(Pack, 'wolves', 'cards', 'cigarettes', 'lies');
+
+assert.sameValue(hits, 1, 'The value of hits is expected to be 1');
+assert.sameValue(
+  value, 4,
+  'The value of value is expected to be 4'
+);
+assert.sameValue(_this_, result, 'The value of _this_ is expected to equal the value of result');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/of/shell.js b/js/src/tests/test262/built-ins/Array/of/shell.js
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/js/src/tests/test262/built-ins/Array/prop-desc.js b/js/src/tests/test262/built-ins/Array/prop-desc.js
new file mode 100644
index 0000000000..8a219660fc
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prop-desc.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2019 Aleksey Shvayka. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array-constructor
+description: >
+  Property descriptor of Array
+info: |
+  22.1.1 The Array Constructor
+
+  * is the initial value of the Array property of the global object.
+
+  17 ECMAScript Standard Built-in Objects
+
+  Every other data property described in clauses 18 through 26 and in Annex B.2
+  has the attributes { [[Writable]]: true, [[Enumerable]]: false,
+  [[Configurable]]: true } unless otherwise specified.
+includes: [propertyHelper.js]
+---*/
+
+verifyProperty(this, 'Array', {
+  value: Array,
+  writable: true,
+  enumerable: false,
+  configurable: true,
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/property-cast-boolean-primitive.js b/js/src/tests/test262/built-ins/Array/property-cast-boolean-primitive.js
new file mode 100644
index 0000000000..9be0514491
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/property-cast-boolean-primitive.js
@@ -0,0 +1,22 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    A property name P (in the form of a string value) is an array index
+    if and only if ToString(ToUint32(P)) is equal to P and ToUint32(P) is not equal to 2^32 - 1
+es5id: 15.4_A1.1_T1
+description: Checking for boolean primitive
+---*/
+
+var x = [];
+
+x[true] = 1;
+assert.sameValue(x[1], undefined, 'The value of x[1] is expected to equal undefined');
+assert.sameValue(x["true"], 1, 'The value of x["true"] is expected to be 1');
+
+x[false] = 0;
+assert.sameValue(x[0], undefined, 'The value of x[0] is expected to equal undefined');
+assert.sameValue(x["false"], 0, 'The value of x["false"] is expected to be 0')
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/property-cast-nan-infinity.js b/js/src/tests/test262/built-ins/Array/property-cast-nan-infinity.js
new file mode 100644
index 0000000000..00333c25f9
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/property-cast-nan-infinity.js
@@ -0,0 +1,28 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    A property name P (in the form of a string value) is an array index
+    if and only if ToString(ToUint32(P)) is equal to P and ToUint32(P) is not equal to 2^32 - 1
+es5id: 15.4_A1.1_T2
+description: Checking for number primitive
+---*/
+
+var x = [];
+
+x[NaN] = 1;
+assert.sameValue(x[0], undefined, 'The value of x[0] is expected to equal undefined');
+assert.sameValue(x["NaN"], 1, 'The value of x["NaN"] is expected to be 1');
+
+var y = [];
+y[Number.POSITIVE_INFINITY] = 1;
+assert.sameValue(y[0], undefined, 'The value of y[0] is expected to equal undefined');
+assert.sameValue(y["Infinity"], 1, 'The value of y["Infinity"] is expected to be 1');
+
+var z = [];
+z[Number.NEGATIVE_INFINITY] = 1;
+assert.sameValue(z[0], undefined, 'The value of z[0] is expected to equal undefined');
+assert.sameValue(z["-Infinity"], 1, 'The value of z["-Infinity"] is expected to be 1');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/property-cast-number.js b/js/src/tests/test262/built-ins/Array/property-cast-number.js
new file mode 100644
index 0000000000..3e49e4c49a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/property-cast-number.js
@@ -0,0 +1,40 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    A property name P (in the form of a string value) is an array index
+    if and only if ToString(ToUint32(P)) is equal to P and ToUint32(P) is not equal to 2^32 - 1
+es5id: 15.4_A1.1_T3
+description: Checking for number primitive
+---*/
+
+var x = [];
+x[4294967296] = 1;
+assert.sameValue(x[0], undefined, 'The value of x[0] is expected to equal undefined');
+assert.sameValue(x["4294967296"], 1, 'The value of x["4294967296"] is expected to be 1');
+
+var y = [];
+y[4294967297] = 1;
+if (y[1] !== undefined) {
+  throw new Test262Error('#3: y = []; y[4294967297] = 1; y[1] === undefined. Actual: ' + (y[1]));
+}
+
+//CHECK#4
+if (y["4294967297"] !== 1) {
+  throw new Test262Error('#4: y = []; y[4294967297] = 1; y["4294967297"] === 1. Actual: ' + (y["4294967297"]));
+}
+
+//CHECK#5
+var z = [];
+z[1.1] = 1;
+if (z[1] !== undefined) {
+  throw new Test262Error('#5: z = []; z[1.1] = 1; z[1] === undefined. Actual: ' + (z[1]));
+}
+
+//CHECK#6
+if (z["1.1"] !== 1) {
+  throw new Test262Error('#6: z = []; z[1.1] = 1; z["1.1"] === 1. Actual: ' + (z["1.1"]));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/proto-from-ctor-realm-one.js b/js/src/tests/test262/built-ins/Array/proto-from-ctor-realm-one.js
new file mode 100644
index 0000000000..4ebc31467c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/proto-from-ctor-realm-one.js
@@ -0,0 +1,56 @@
+// Copyright (C) 2019 Alexey Shvayka. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array-len
+description: Default [[Prototype]] value derived from realm of the NewTarget.
+info: |
+  Array ( len )
+
+  ...
+  3. If NewTarget is undefined, let newTarget be the active function object; else let newTarget be NewTarget.
+  4. Let proto be ? GetPrototypeFromConstructor(newTarget, "%Array.prototype%").
+  5. Let array be ! ArrayCreate(0, proto).
+  ...
+  9. Return array.
+
+  GetPrototypeFromConstructor ( constructor, intrinsicDefaultProto )
+
+  ...
+  3. Let proto be ? Get(constructor, "prototype").
+  4. If Type(proto) is not Object, then
+    a. Let realm be ? GetFunctionRealm(constructor).
+    b. Set proto to realm's intrinsic object named intrinsicDefaultProto.
+  5. Return proto.
+features: [cross-realm, Reflect, Symbol]
+---*/
+
+var other = $262.createRealm().global;
+var newTarget = new other.Function();
+var arr;
+
+newTarget.prototype = undefined;
+arr = Reflect.construct(Array, [1], newTarget);
+assert.sameValue(Object.getPrototypeOf(arr), other.Array.prototype, 'Object.getPrototypeOf(Reflect.construct(Array, [1], newTarget)) returns other.Array.prototype');
+
+newTarget.prototype = null;
+arr = Reflect.construct(Array, [1], newTarget);
+assert.sameValue(Object.getPrototypeOf(arr), other.Array.prototype, 'Object.getPrototypeOf(Reflect.construct(Array, [1], newTarget)) returns other.Array.prototype');
+
+newTarget.prototype = true;
+arr = Reflect.construct(Array, [1], newTarget);
+assert.sameValue(Object.getPrototypeOf(arr), other.Array.prototype, 'Object.getPrototypeOf(Reflect.construct(Array, [1], newTarget)) returns other.Array.prototype');
+
+newTarget.prototype = '';
+arr = Reflect.construct(Array, [1], newTarget);
+assert.sameValue(Object.getPrototypeOf(arr), other.Array.prototype, 'Object.getPrototypeOf(Reflect.construct(Array, [1], newTarget)) returns other.Array.prototype');
+
+newTarget.prototype = Symbol();
+arr = Reflect.construct(Array, [1], newTarget);
+assert.sameValue(Object.getPrototypeOf(arr), other.Array.prototype, 'Object.getPrototypeOf(Reflect.construct(Array, [1], newTarget)) returns other.Array.prototype');
+
+newTarget.prototype = 0;
+arr = Reflect.construct(Array, [1], newTarget);
+assert.sameValue(Object.getPrototypeOf(arr), other.Array.prototype, 'Object.getPrototypeOf(Reflect.construct(Array, [1], newTarget)) returns other.Array.prototype');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/proto-from-ctor-realm-two.js b/js/src/tests/test262/built-ins/Array/proto-from-ctor-realm-two.js
new file mode 100644
index 0000000000..692709d5b1
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/proto-from-ctor-realm-two.js
@@ -0,0 +1,56 @@
+// Copyright (C) 2019 Alexey Shvayka. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array-items
+description: Default [[Prototype]] value derived from realm of the NewTarget.
+info: |
+  Array ( ...items )
+
+  ...
+  3. If NewTarget is undefined, let newTarget be the active function object; else let newTarget be NewTarget.
+  4. Let proto be ? GetPrototypeFromConstructor(newTarget, "%Array.prototype%").
+  5. Let array be ? ArrayCreate(numberOfArgs, proto).
+  ...
+  10. Return array.
+
+  GetPrototypeFromConstructor ( constructor, intrinsicDefaultProto )
+
+  ...
+  3. Let proto be ? Get(constructor, "prototype").
+  4. If Type(proto) is not Object, then
+    a. Let realm be ? GetFunctionRealm(constructor).
+    b. Set proto to realm's intrinsic object named intrinsicDefaultProto.
+  5. Return proto.
+features: [cross-realm, Reflect, Symbol]
+---*/
+
+var other = $262.createRealm().global;
+var newTarget = new other.Function();
+var arr;
+
+newTarget.prototype = undefined;
+arr = Reflect.construct(Array, ['a', 'b'], newTarget);
+assert.sameValue(Object.getPrototypeOf(arr), other.Array.prototype, 'Object.getPrototypeOf(Reflect.construct(Array, ["a", "b"], newTarget)) returns other.Array.prototype');
+
+newTarget.prototype = null;
+arr = Reflect.construct(Array, ['a', 'b'], newTarget);
+assert.sameValue(Object.getPrototypeOf(arr), other.Array.prototype, 'Object.getPrototypeOf(Reflect.construct(Array, ["a", "b"], newTarget)) returns other.Array.prototype');
+
+newTarget.prototype = false;
+arr = Reflect.construct(Array, ['a', 'b'], newTarget);
+assert.sameValue(Object.getPrototypeOf(arr), other.Array.prototype, 'Object.getPrototypeOf(Reflect.construct(Array, ["a", "b"], newTarget)) returns other.Array.prototype');
+
+newTarget.prototype = '';
+arr = Reflect.construct(Array, ['a', 'b'], newTarget);
+assert.sameValue(Object.getPrototypeOf(arr), other.Array.prototype, 'Object.getPrototypeOf(Reflect.construct(Array, ["a", "b"], newTarget)) returns other.Array.prototype');
+
+newTarget.prototype = Symbol();
+arr = Reflect.construct(Array, ['a', 'b'], newTarget);
+assert.sameValue(Object.getPrototypeOf(arr), other.Array.prototype, 'Object.getPrototypeOf(Reflect.construct(Array, ["a", "b"], newTarget)) returns other.Array.prototype');
+
+newTarget.prototype = -1;
+arr = Reflect.construct(Array, ['a', 'b'], newTarget);
+assert.sameValue(Object.getPrototypeOf(arr), other.Array.prototype, 'Object.getPrototypeOf(Reflect.construct(Array, ["a", "b"], newTarget)) returns other.Array.prototype');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/proto-from-ctor-realm-zero.js b/js/src/tests/test262/built-ins/Array/proto-from-ctor-realm-zero.js
new file mode 100644
index 0000000000..09c458336c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/proto-from-ctor-realm-zero.js
@@ -0,0 +1,54 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array-constructor-array
+description: Default [[Prototype]] value derived from realm of the NewTarget.
+info: |
+  Array ( )
+
+  ...
+  3. If NewTarget is undefined, let newTarget be the active function object; else let newTarget be NewTarget.
+  4. Let proto be ? GetPrototypeFromConstructor(newTarget, "%Array.prototype%").
+  5. Return ! ArrayCreate(0, proto).
+
+  GetPrototypeFromConstructor ( constructor, intrinsicDefaultProto )
+
+  ...
+  3. Let proto be ? Get(constructor, "prototype").
+  4. If Type(proto) is not Object, then
+    a. Let realm be ? GetFunctionRealm(constructor).
+    b. Set proto to realm's intrinsic object named intrinsicDefaultProto.
+  5. Return proto.
+features: [cross-realm, Reflect, Symbol]
+---*/
+
+var other = $262.createRealm().global;
+var newTarget = new other.Function();
+var arr;
+
+newTarget.prototype = undefined;
+arr = Reflect.construct(Array, [], newTarget);
+assert.sameValue(Object.getPrototypeOf(arr), other.Array.prototype, 'Object.getPrototypeOf(Reflect.construct(Array, [], newTarget)) returns other.Array.prototype');
+
+newTarget.prototype = null;
+arr = Reflect.construct(Array, [], newTarget);
+assert.sameValue(Object.getPrototypeOf(arr), other.Array.prototype, 'Object.getPrototypeOf(Reflect.construct(Array, [], newTarget)) returns other.Array.prototype');
+
+newTarget.prototype = true;
+arr = Reflect.construct(Array, [], newTarget);
+assert.sameValue(Object.getPrototypeOf(arr), other.Array.prototype, 'Object.getPrototypeOf(Reflect.construct(Array, [], newTarget)) returns other.Array.prototype');
+
+newTarget.prototype = 'str';
+arr = Reflect.construct(Array, [], newTarget);
+assert.sameValue(Object.getPrototypeOf(arr), other.Array.prototype, 'Object.getPrototypeOf(Reflect.construct(Array, [], newTarget)) returns other.Array.prototype');
+
+newTarget.prototype = Symbol();
+arr = Reflect.construct(Array, [], newTarget);
+assert.sameValue(Object.getPrototypeOf(arr), other.Array.prototype, 'Object.getPrototypeOf(Reflect.construct(Array, [], newTarget)) returns other.Array.prototype');
+
+newTarget.prototype = 1;
+arr = Reflect.construct(Array, [], newTarget);
+assert.sameValue(Object.getPrototypeOf(arr), other.Array.prototype, 'Object.getPrototypeOf(Reflect.construct(Array, [], newTarget)) returns other.Array.prototype');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/proto.js b/js/src/tests/test262/built-ins/Array/proto.js
new file mode 100644
index 0000000000..1d26d846c8
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/proto.js
@@ -0,0 +1,21 @@
+// Copyright (C) 2017 Leo Balter. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-properties-of-the-array-constructor
+description: >
+  The prototype of the Array constructor is the intrinsic object %FunctionPrototype%.
+info: |
+  22.1.2 Properties of the Array Constructor
+
+  The value of the [[Prototype]] internal slot of the Array constructor is the
+  intrinsic object %FunctionPrototype%.
+---*/
+
+assert.sameValue(
+  Object.getPrototypeOf(Array),
+  Function.prototype,
+  'Object.getPrototypeOf(Array) returns Function.prototype'
+);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/Symbol.iterator.js b/js/src/tests/test262/built-ins/Array/prototype/Symbol.iterator.js
new file mode 100644
index 0000000000..a8335adc13
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/Symbol.iterator.js
@@ -0,0 +1,22 @@
+// Copyright (C) 2013 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+description: Initial state of the Symbol.iterator property
+info: |
+    The initial value of the @@iterator property is the same function object as
+    the initial value of the Array.prototype.values property.
+
+    Per ES6 section 17, the method should exist on the Array prototype, and it
+    should be writable and configurable, but not enumerable.
+includes: [propertyHelper.js]
+features: [Symbol.iterator]
+esid: sec-array.prototype-@@iterator
+---*/
+
+assert.sameValue(Array.prototype[Symbol.iterator], Array.prototype.values);
+verifyNotEnumerable(Array.prototype, Symbol.iterator);
+verifyWritable(Array.prototype, Symbol.iterator);
+verifyConfigurable(Array.prototype, Symbol.iterator);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/Symbol.iterator/browser.js b/js/src/tests/test262/built-ins/Array/prototype/Symbol.iterator/browser.js
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/js/src/tests/test262/built-ins/Array/prototype/Symbol.iterator/not-a-constructor.js b/js/src/tests/test262/built-ins/Array/prototype/Symbol.iterator/not-a-constructor.js
new file mode 100644
index 0000000000..5d7c96289e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/Symbol.iterator/not-a-constructor.js
@@ -0,0 +1,35 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Array.prototype[Symbol.iterator] does not implement [[Construct]], is not new-able
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+
+  sec-evaluatenew
+
+  ...
+  7. If IsConstructor(constructor) is false, throw a TypeError exception.
+  ...
+includes: [isConstructor.js]
+features: [Reflect.construct, Symbol, Symbol.iterator, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Array.prototype[Symbol.iterator]),
+  false,
+  'isConstructor(Array.prototype[Symbol.iterator]) must return false'
+);
+
+assert.throws(TypeError, () => {
+  new Array.prototype[Symbol.iterator]();
+}, '`new Array.prototype[Symbol.iterator]()` throws TypeError');
+
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/Symbol.iterator/shell.js b/js/src/tests/test262/built-ins/Array/prototype/Symbol.iterator/shell.js
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/js/src/tests/test262/built-ins/Array/prototype/Symbol.unscopables/array-find-from-last.js b/js/src/tests/test262/built-ins/Array/prototype/Symbol.unscopables/array-find-from-last.js
new file mode 100644
index 0000000000..fae0d595c2
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/Symbol.unscopables/array-find-from-last.js
@@ -0,0 +1,33 @@
+// Copyright (C) 2022 Microsoft. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype-@@unscopables
+description: >
+    Initial value of `Symbol.unscopables` property
+info: |
+    22.1.3.32 Array.prototype [ @@unscopables ]
+
+    ...
+    7. Perform CreateDataProperty(unscopableList, "findLast", true).
+    8. Perform CreateDataProperty(unscopableList, "findLastIndex", true).
+    ...
+
+includes: [propertyHelper.js]
+features: [Symbol.unscopables, array-find-from-last]
+---*/
+
+var unscopables = Array.prototype[Symbol.unscopables];
+
+assert.sameValue(Object.getPrototypeOf(unscopables), null);
+
+assert.sameValue(unscopables.findLast, true, '`findLast` property value');
+verifyEnumerable(unscopables, 'findLast');
+verifyWritable(unscopables, 'findLast');
+verifyConfigurable(unscopables, 'findLast');
+
+assert.sameValue(unscopables.findLastIndex, true, '`findLastIndex` property value');
+verifyEnumerable(unscopables, 'findLastIndex');
+verifyWritable(unscopables, 'findLastIndex');
+verifyConfigurable(unscopables, 'findLastIndex');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/Symbol.unscopables/browser.js b/js/src/tests/test262/built-ins/Array/prototype/Symbol.unscopables/browser.js
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/js/src/tests/test262/built-ins/Array/prototype/Symbol.unscopables/change-array-by-copy.js b/js/src/tests/test262/built-ins/Array/prototype/Symbol.unscopables/change-array-by-copy.js
new file mode 100644
index 0000000000..f7dfc87b02
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/Symbol.unscopables/change-array-by-copy.js
@@ -0,0 +1,31 @@
+// Copyright (C) 2021 Igalia. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype-@@unscopables
+description: >
+    Initial value of `Symbol.unscopables` property
+info: |
+    22.1.3.32 Array.prototype [ @@unscopables ]
+
+    ...
+    12. Perform ! CreateDataPropertyOrThrow(unscopableList, "toReversed", true).
+    13. Perform ! CreateDataPropertyOrThrow(unscopableList, "toSorted", true).
+    14. Perform ! CreateDataPropertyOrThrow(unscopableList, "toSpliced", true).
+    ...
+includes: [propertyHelper.js]
+features: [Symbol.unscopables, change-array-by-copy]
+---*/
+
+var unscopables = Array.prototype[Symbol.unscopables];
+
+for (const unscopable of ["toReversed", "toSorted", "toSpliced"]) {
+    verifyProperty(unscopables, unscopable, {
+        value: true,
+        writable: true,
+        configurable: true
+    })
+};
+
+assert(!Object.prototype.hasOwnProperty.call(unscopables, "with"), "does not have `with`");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/Symbol.unscopables/prop-desc.js b/js/src/tests/test262/built-ins/Array/prototype/Symbol.unscopables/prop-desc.js
new file mode 100644
index 0000000000..0d554345ef
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/Symbol.unscopables/prop-desc.js
@@ -0,0 +1,18 @@
+// Copyright (C) 2015 Mike Pennisi. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype-@@unscopables
+description: >
+    Property descriptor for initial value of `Symbol.unscopables` property
+info: |
+    This property has the attributes { [[Writable]]: false, [[Enumerable]]:
+    false, [[Configurable]]: true }.
+includes: [propertyHelper.js]
+features: [Symbol.unscopables]
+---*/
+
+verifyNotEnumerable(Array.prototype, Symbol.unscopables);
+verifyNotWritable(Array.prototype, Symbol.unscopables);
+verifyConfigurable(Array.prototype, Symbol.unscopables);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/Symbol.unscopables/shell.js b/js/src/tests/test262/built-ins/Array/prototype/Symbol.unscopables/shell.js
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/js/src/tests/test262/built-ins/Array/prototype/Symbol.unscopables/value.js b/js/src/tests/test262/built-ins/Array/prototype/Symbol.unscopables/value.js
new file mode 100644
index 0000000000..3bd5e4fad8
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/Symbol.unscopables/value.js
@@ -0,0 +1,82 @@
+// Copyright (C) 2015 Mike Pennisi. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype-@@unscopables
+description: >
+    Initial value of `Symbol.unscopables` property
+info: |
+    22.1.3.32 Array.prototype [ @@unscopables ]
+
+    1. Let unscopableList be ObjectCreate(null).
+    2. Perform CreateDataProperty(unscopableList, "copyWithin", true).
+    3. Perform CreateDataProperty(unscopableList, "entries", true).
+    4. Perform CreateDataProperty(unscopableList, "fill", true).
+    5. Perform CreateDataProperty(unscopableList, "find", true).
+    6. Perform CreateDataProperty(unscopableList, "findIndex", true).
+    7. Perform CreateDataProperty(unscopableList, "flat", true).
+    8. Perform CreateDataProperty(unscopableList, "flatMap", true).
+    9. Perform CreateDataProperty(unscopableList, "includes", true).
+    10. Perform CreateDataProperty(unscopableList, "keys", true).
+    11. Perform CreateDataProperty(unscopableList, "values", true).
+    12. Assert: Each of the above calls returns true.
+    13. Return unscopableList.
+
+includes: [propertyHelper.js]
+features: [Symbol.unscopables]
+---*/
+
+var unscopables = Array.prototype[Symbol.unscopables];
+
+assert.sameValue(Object.getPrototypeOf(unscopables), null);
+
+assert.sameValue(unscopables.copyWithin, true, '`copyWithin` property value');
+verifyEnumerable(unscopables, 'copyWithin');
+verifyWritable(unscopables, 'copyWithin');
+verifyConfigurable(unscopables, 'copyWithin');
+
+assert.sameValue(unscopables.entries, true, '`entries` property value');
+verifyEnumerable(unscopables, 'entries');
+verifyWritable(unscopables, 'entries');
+verifyConfigurable(unscopables, 'entries');
+
+assert.sameValue(unscopables.fill, true, '`fill` property value');
+verifyEnumerable(unscopables, 'fill');
+verifyWritable(unscopables, 'fill');
+verifyConfigurable(unscopables, 'fill');
+
+assert.sameValue(unscopables.find, true, '`find` property value');
+verifyEnumerable(unscopables, 'find');
+verifyWritable(unscopables, 'find');
+verifyConfigurable(unscopables, 'find');
+
+assert.sameValue(unscopables.findIndex, true, '`findIndex` property value');
+verifyEnumerable(unscopables, 'findIndex');
+verifyWritable(unscopables, 'findIndex');
+verifyConfigurable(unscopables, 'findIndex');
+
+assert.sameValue(unscopables.flat, true, '`flat` property value');
+verifyEnumerable(unscopables, 'flat');
+verifyWritable(unscopables, 'flat');
+verifyConfigurable(unscopables, 'flat');
+
+assert.sameValue(unscopables.flatMap, true, '`flatMap` property value');
+verifyEnumerable(unscopables, 'flatMap');
+verifyWritable(unscopables, 'flatMap');
+verifyConfigurable(unscopables, 'flatMap');
+
+assert.sameValue(unscopables.includes, true, '`includes` property value');
+verifyEnumerable(unscopables, 'includes');
+verifyWritable(unscopables, 'includes');
+verifyConfigurable(unscopables, 'includes');
+
+assert.sameValue(unscopables.keys, true, '`keys` property value');
+verifyEnumerable(unscopables, 'keys');
+verifyWritable(unscopables, 'keys');
+verifyConfigurable(unscopables, 'keys');
+
+assert.sameValue(unscopables.values, true, '`values` property value');
+verifyEnumerable(unscopables, 'values');
+verifyWritable(unscopables, 'values');
+verifyConfigurable(unscopables, 'values');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/at/browser.js b/js/src/tests/test262/built-ins/Array/prototype/at/browser.js
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/js/src/tests/test262/built-ins/Array/prototype/at/index-argument-tointeger.js b/js/src/tests/test262/built-ins/Array/prototype/at/index-argument-tointeger.js
new file mode 100644
index 0000000000..3d5e2e9392
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/at/index-argument-tointeger.js
@@ -0,0 +1,33 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.at
+description: >
+  Property type and descriptor.
+info: |
+  Array.prototype.at( index )
+
+  Let relativeIndex be ? ToInteger(index).
+
+features: [Array.prototype.at]
+---*/
+assert.sameValue(
+  typeof Array.prototype.at,
+  'function',
+  'The value of `typeof Array.prototype.at` is expected to be "function"'
+);
+
+let valueOfCallCount = 0;
+let index = {
+  valueOf() {
+    valueOfCallCount++;
+    return 1;
+  }
+};
+
+let a = [0,1,2,3];
+
+assert.sameValue(a.at(index), 1, 'a.at({valueOf() {valueOfCallCount++; return 1;}}) must return 1');
+assert.sameValue(valueOfCallCount, 1, 'The value of valueOfCallCount is expected to be 1');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/at/index-non-numeric-argument-tointeger-invalid.js b/js/src/tests/test262/built-ins/Array/prototype/at/index-non-numeric-argument-tointeger-invalid.js
new file mode 100644
index 0000000000..224f4a2cfb
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/at/index-non-numeric-argument-tointeger-invalid.js
@@ -0,0 +1,26 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.at
+description: >
+  Property type and descriptor.
+info: |
+  Array.prototype.at( index )
+
+  Let relativeIndex be ? ToInteger(index).
+
+features: [Array.prototype.at]
+---*/
+assert.sameValue(
+  typeof Array.prototype.at,
+  'function',
+  'The value of `typeof Array.prototype.at` is expected to be "function"'
+);
+
+let a = [0,1,2,3];
+
+assert.throws(TypeError, () => {
+  a.at(Symbol());
+}, 'a.at(Symbol()) throws a TypeError exception');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/at/index-non-numeric-argument-tointeger.js b/js/src/tests/test262/built-ins/Array/prototype/at/index-non-numeric-argument-tointeger.js
new file mode 100644
index 0000000000..c312b67904
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/at/index-non-numeric-argument-tointeger.js
@@ -0,0 +1,32 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.at
+description: >
+  Property type and descriptor.
+info: |
+  Array.prototype.at( index )
+
+  Let relativeIndex be ? ToInteger(index).
+
+features: [Array.prototype.at]
+---*/
+assert.sameValue(
+  typeof Array.prototype.at,
+  'function',
+  'The value of `typeof Array.prototype.at` is expected to be "function"'
+);
+
+let a = [0,1,2,3];
+
+assert.sameValue(a.at(false), 0, 'a.at(false) must return 0');
+assert.sameValue(a.at(null), 0, 'a.at(null) must return 0');
+assert.sameValue(a.at(undefined), 0, 'a.at(undefined) must return 0');
+assert.sameValue(a.at(""), 0, 'a.at("") must return 0');
+assert.sameValue(a.at(function() {}), 0, 'a.at(function() {}) must return 0');
+assert.sameValue(a.at([]), 0, 'a.at([]) must return 0');
+
+assert.sameValue(a.at(true), 1, 'a.at(true) must return 1');
+assert.sameValue(a.at("1"), 1, 'a.at("1") must return 1');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/at/length.js b/js/src/tests/test262/built-ins/Array/prototype/at/length.js
new file mode 100644
index 0000000000..219f329eb4
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/at/length.js
@@ -0,0 +1,30 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.at
+description: >
+  Array.prototype.at.length value and descriptor.
+info: |
+  Array.prototype.at( index )
+
+  17 ECMAScript Standard Built-in Objects
+
+includes: [propertyHelper.js]
+features: [Array.prototype.at]
+---*/
+assert.sameValue(
+  typeof Array.prototype.at,
+  'function',
+  'The value of `typeof Array.prototype.at` is expected to be "function"'
+);
+
+assert.sameValue(
+  Array.prototype.at.length, 1,
+  'The value of Array.prototype.at.length is expected to be 1'
+);
+
+verifyNotEnumerable(Array.prototype.at, 'length');
+verifyNotWritable(Array.prototype.at, 'length');
+verifyConfigurable(Array.prototype.at, 'length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/at/name.js b/js/src/tests/test262/built-ins/Array/prototype/at/name.js
new file mode 100644
index 0000000000..1f19e92eae
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/at/name.js
@@ -0,0 +1,32 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.at
+description: >
+  Array.prototype.at.name value and descriptor.
+info: |
+  Array.prototype.at( index )
+
+  17 ECMAScript Standard Built-in Objects
+
+includes: [propertyHelper.js]
+features: [Array.prototype.at]
+---*/
+assert.sameValue(
+  typeof Array.prototype.at,
+  'function',
+  'The value of `typeof Array.prototype.at` is expected to be "function"'
+);
+
+assert.sameValue(
+  Array.prototype.at.name, 'at',
+  'The value of Array.prototype.at.name is expected to be "at"'
+);
+
+verifyProperty(Array.prototype.at, 'name', {
+  enumerable: false,
+  writable: false,
+  configurable: true
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/at/prop-desc.js b/js/src/tests/test262/built-ins/Array/prototype/at/prop-desc.js
new file mode 100644
index 0000000000..1f79f75d3a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/at/prop-desc.js
@@ -0,0 +1,32 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.at
+description: >
+  Property type and descriptor.
+info: |
+  Array.prototype.at( index )
+
+  17 ECMAScript Standard Built-in Objects
+includes: [propertyHelper.js]
+features: [Array.prototype.at]
+---*/
+assert.sameValue(
+  typeof Array.prototype.at,
+  'function',
+  'The value of `typeof Array.prototype.at` is expected to be "function"'
+);
+
+assert.sameValue(
+  typeof Array.prototype.at,
+  'function',
+  'The value of `typeof Array.prototype.at` is expected to be "function"'
+);
+
+verifyProperty(Array.prototype, 'at', {
+  enumerable: false,
+  writable: true,
+  configurable: true
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/at/return-abrupt-from-this.js b/js/src/tests/test262/built-ins/Array/prototype/at/return-abrupt-from-this.js
new file mode 100644
index 0000000000..ce99ebaed0
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/at/return-abrupt-from-this.js
@@ -0,0 +1,28 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.at
+description: >
+  Return abrupt from ToObject(this value).
+info: |
+  Array.prototype.at( index )
+
+  Let O be ? ToObject(this value).
+
+features: [Array.prototype.at]
+---*/
+assert.sameValue(
+  typeof Array.prototype.at,
+  'function',
+  'The value of `typeof Array.prototype.at` is expected to be "function"'
+);
+
+assert.throws(TypeError, () => {
+  Array.prototype.at.call(undefined);
+}, 'Array.prototype.at.call(undefined) throws a TypeError exception');
+
+assert.throws(TypeError, () => {
+  Array.prototype.at.call(null);
+}, 'Array.prototype.at.call(null) throws a TypeError exception');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/at/returns-item-relative-index.js b/js/src/tests/test262/built-ins/Array/prototype/at/returns-item-relative-index.js
new file mode 100644
index 0000000000..e131ef40fb
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/at/returns-item-relative-index.js
@@ -0,0 +1,36 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.at
+description: >
+  Returns the item value at the specified relative index
+info: |
+  Array.prototype.at ( )
+
+  Let O be ? ToObject(this value).
+  Let len be ? LengthOfArrayLike(O).
+  Let relativeIndex be ? ToInteger(index).
+  If relativeIndex ≥ 0, then
+    Let k be relativeIndex.
+  Else,
+    Let k be len + relativeIndex.
+  If k < 0 or k ≥ len, then return undefined.
+  Return ? Get(O, ! ToString(k)).
+
+features: [Array.prototype.at]
+---*/
+assert.sameValue(
+  typeof Array.prototype.at,
+  'function',
+  'The value of `typeof Array.prototype.at` is expected to be "function"'
+);
+
+let a = [1, 2, 3, 4, ,5];
+
+assert.sameValue(a.at(0), 1, 'a.at(0) must return 1');
+assert.sameValue(a.at(-1), 5, 'a.at(-1) must return 5');
+assert.sameValue(a.at(-2), undefined, 'a.at(-2) returns undefined');
+assert.sameValue(a.at(-3), 4, 'a.at(-3) must return 4');
+assert.sameValue(a.at(-4), 3, 'a.at(-4) must return 3');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/at/returns-item.js b/js/src/tests/test262/built-ins/Array/prototype/at/returns-item.js
new file mode 100644
index 0000000000..be25e281f4
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/at/returns-item.js
@@ -0,0 +1,37 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.at
+description: >
+  Returns the item value at the specified index
+info: |
+  Array.prototype.at ( )
+
+  Let O be ? ToObject(this value).
+  Let len be ? LengthOfArrayLike(O).
+  Let relativeIndex be ? ToInteger(index).
+  If relativeIndex ≥ 0, then
+    Let k be relativeIndex.
+  Else,
+    Let k be len + relativeIndex.
+  If k < 0 or k ≥ len, then return undefined.
+  Return ? Get(O, ! ToString(k)).
+
+features: [Array.prototype.at]
+---*/
+assert.sameValue(
+  typeof Array.prototype.at,
+  'function',
+  'The value of `typeof Array.prototype.at` is expected to be "function"'
+);
+
+let a = [1, 2, 3, 4,,5];
+
+assert.sameValue(a.at(0), 1, 'a.at(0) must return 1');
+assert.sameValue(a.at(1), 2, 'a.at(1) must return 2');
+assert.sameValue(a.at(2), 3, 'a.at(2) must return 3');
+assert.sameValue(a.at(3), 4, 'a.at(3) must return 4');
+assert.sameValue(a.at(4), undefined, 'a.at(4) returns undefined');
+assert.sameValue(a.at(5), 5, 'a.at(5) must return 5');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/at/returns-undefined-for-holes-in-sparse-arrays.js b/js/src/tests/test262/built-ins/Array/prototype/at/returns-undefined-for-holes-in-sparse-arrays.js
new file mode 100644
index 0000000000..4c9a573b53
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/at/returns-undefined-for-holes-in-sparse-arrays.js
@@ -0,0 +1,45 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.at
+description: >
+  Returns the item value at the specified index, respecting holes in sparse arrays.
+info: |
+  Array.prototype.at ( )
+
+  Let O be ? ToObject(this value).
+  Let len be ? LengthOfArrayLike(O).
+  Let relativeIndex be ? ToInteger(index).
+  If relativeIndex ≥ 0, then
+    Let k be relativeIndex.
+  Else,
+    Let k be len + relativeIndex.
+  If k < 0 or k ≥ len, then return undefined.
+  Return ? Get(O, ! ToString(k)).
+
+features: [Array.prototype.at]
+---*/
+assert.sameValue(
+  typeof Array.prototype.at,
+  'function',
+  'The value of `typeof Array.prototype.at` is expected to be "function"'
+);
+
+let a = [0, 1, , 3, 4, , 6];
+
+assert.sameValue(a.at(0), 0, 'a.at(0) must return 0');
+assert.sameValue(a.at(1), 1, 'a.at(1) must return 1');
+assert.sameValue(a.at(2), undefined, 'a.at(2) returns undefined');
+assert.sameValue(a.at(3), 3, 'a.at(3) must return 3');
+assert.sameValue(a.at(4), 4, 'a.at(4) must return 4');
+assert.sameValue(a.at(5), undefined, 'a.at(5) returns undefined');
+assert.sameValue(a.at(6), 6, 'a.at(6) must return 6');
+assert.sameValue(a.at(-0), 0, 'a.at(-0) must return 0');
+assert.sameValue(a.at(-1), 6, 'a.at(-1) must return 6');
+assert.sameValue(a.at(-2), undefined, 'a.at(-2) returns undefined');
+assert.sameValue(a.at(-3), 4, 'a.at(-3) must return 4');
+assert.sameValue(a.at(-4), 3, 'a.at(-4) must return 3');
+assert.sameValue(a.at(-5), undefined, 'a.at(-5) returns undefined');
+assert.sameValue(a.at(-6), 1, 'a.at(-6) must return 1');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/at/returns-undefined-for-out-of-range-index.js b/js/src/tests/test262/built-ins/Array/prototype/at/returns-undefined-for-out-of-range-index.js
new file mode 100644
index 0000000000..757ff87241
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/at/returns-undefined-for-out-of-range-index.js
@@ -0,0 +1,26 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.at
+description: >
+  Returns undefined if the specified index less than or greater than the available index range.
+info: |
+  Array.prototype.at( index )
+
+  If k < 0 or k ≥ len, then return undefined.
+features: [Array.prototype.at]
+---*/
+assert.sameValue(
+  typeof Array.prototype.at,
+  'function',
+  'The value of `typeof Array.prototype.at` is expected to be "function"'
+);
+
+let a = [];
+
+assert.sameValue(a.at(-2), undefined, 'a.at(-2) returns undefined'); // wrap around the end
+assert.sameValue(a.at(0), undefined, 'a.at(0) returns undefined');
+assert.sameValue(a.at(1), undefined, 'a.at(1) returns undefined');
+
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/at/shell.js b/js/src/tests/test262/built-ins/Array/prototype/at/shell.js
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/js/src/tests/test262/built-ins/Array/prototype/browser.js b/js/src/tests/test262/built-ins/Array/prototype/browser.js
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/js/src/tests/test262/built-ins/Array/prototype/concat/15.4.4.4-5-b-iii-3-b-1.js b/js/src/tests/test262/built-ins/Array/prototype/concat/15.4.4.4-5-b-iii-3-b-1.js
new file mode 100644
index 0000000000..213a63acc5
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/concat/15.4.4.4-5-b-iii-3-b-1.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.concat
+description: >
+    Array.prototype.concat will concat an Array when index property
+    (read-only) exists in Array.prototype (Step 5.b.iii.3.b)
+includes: [propertyHelper.js]
+---*/
+
+Object.defineProperty(Array.prototype, "0", {
+  value: 100,
+  writable: false,
+  configurable: true
+});
+
+var oldArr = [101];
+var newArr = Array.prototype.concat.call(oldArr);
+
+verifyProperty(newArr, "0", {
+  value: 101,
+  writable: true,
+  enumerable: true,
+  configurable: true,
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/concat/15.4.4.4-5-c-i-1.js b/js/src/tests/test262/built-ins/Array/prototype/concat/15.4.4.4-5-c-i-1.js
new file mode 100644
index 0000000000..104ca1114d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/concat/15.4.4.4-5-c-i-1.js
@@ -0,0 +1,30 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.concat
+description: >
+    Array.prototype.concat will concat an Array when index property
+    (read-only) exists in Array.prototype (Step 5.c.i)
+includes: [propertyHelper.js]
+---*/
+
+Object.defineProperty(Array.prototype, "0", {
+  value: 100,
+  writable: false,
+  configurable: true
+});
+
+var newArrayFromConcat = Array.prototype.concat.call(101);
+
+assert(
+  newArrayFromConcat[0] instanceof Number,
+  'The result of evaluating (newArrayFromConcat[0] instanceof Number) is expected to be true'
+);
+verifyProperty(newArrayFromConcat, "0", {
+  writable: true,
+  enumerable: true,
+  configurable: true,
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/concat/Array.prototype.concat_array-like-length-to-string-throws.js b/js/src/tests/test262/built-ins/Array/prototype/concat/Array.prototype.concat_array-like-length-to-string-throws.js
new file mode 100644
index 0000000000..64a1fce627
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/concat/Array.prototype.concat_array-like-length-to-string-throws.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2014 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.concat
+description: Array.prototype.concat array like length to string throws
+features: [Symbol.isConcatSpreadable]
+---*/
+var objWithPoisonedLengthToString = {
+  "length": {
+    toString: function() {
+      throw new Test262Error();
+    },
+    valueOf: null
+  },
+  "1": "A",
+  "3": "B",
+  "5": "C"
+};
+objWithPoisonedLengthToString[Symbol.isConcatSpreadable] = true;
+assert.throws(Test262Error, function() {
+  [].concat(objWithPoisonedLengthToString);
+}, '[].concat(objWithPoisonedLengthToString) throws a Test262Error exception');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/concat/Array.prototype.concat_array-like-length-value-of-throws.js b/js/src/tests/test262/built-ins/Array/prototype/concat/Array.prototype.concat_array-like-length-value-of-throws.js
new file mode 100644
index 0000000000..2ef6eacd26
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/concat/Array.prototype.concat_array-like-length-value-of-throws.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2014 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.concat
+description: Array.prototype.concat array like length valueOf throws
+features: [Symbol.isConcatSpreadable]
+---*/
+var objWithPoisonedLengthValueOf = {
+  "length": {
+    valueOf: function() {
+      throw new Test262Error();
+    },
+    toString: null
+  },
+  "1": "A",
+  "3": "B",
+  "5": "C"
+};
+objWithPoisonedLengthValueOf[Symbol.isConcatSpreadable] = true;
+assert.throws(Test262Error, function() {
+  [].concat(objWithPoisonedLengthValueOf);
+}, '[].concat(objWithPoisonedLengthValueOf) throws a Test262Error exception');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/concat/Array.prototype.concat_array-like-negative-length.js b/js/src/tests/test262/built-ins/Array/prototype/concat/Array.prototype.concat_array-like-negative-length.js
new file mode 100644
index 0000000000..91cbc74883
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/concat/Array.prototype.concat_array-like-negative-length.js
@@ -0,0 +1,24 @@
+// Copyright (c) 2014 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.concat
+description: Array.prototype.concat array like negative length
+includes: [compareArray.js]
+features: [Symbol.isConcatSpreadable]
+---*/
+var obj = {
+  "length": -4294967294,
+  "1": "A",
+  "3": "B",
+  "5": "C"
+};
+obj[Symbol.isConcatSpreadable] = true;
+assert.compareArray([].concat(obj), [], '[].concat({"length": -4294967294, "1": "A", "3": "B", "5": "C"}) must return []');
+obj.length = -4294967294;
+assert.compareArray([].concat(obj), [], '[].concat({"length": -4294967294, "1": "A", "3": "B", "5": "C"}) must return []');
+obj.length = "-4294967294";
+assert.compareArray([].concat(obj), [], '[].concat({"length": -4294967294, "1": "A", "3": "B", "5": "C"}) must return []');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/concat/Array.prototype.concat_array-like-primitive-non-number-length.js b/js/src/tests/test262/built-ins/Array/prototype/concat/Array.prototype.concat_array-like-primitive-non-number-length.js
new file mode 100644
index 0000000000..d03a424288
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/concat/Array.prototype.concat_array-like-primitive-non-number-length.js
@@ -0,0 +1,32 @@
+// Copyright (c) 2014 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.concat
+description: Array.prototype.concat array like primitive non number length
+includes: [compareArray.js]
+features: [Symbol.isConcatSpreadable]
+---*/
+var obj = {
+  "1": "A",
+  "3": "B",
+  "5": "C"
+};
+obj[Symbol.isConcatSpreadable] = true;
+obj.length = {
+  toString: function() {
+    return "SIX";
+  },
+  valueOf: null
+};
+assert.compareArray([].concat(obj), [], '[].concat({"1": "A", "3": "B", "5": "C"}) must return []');
+obj.length = {
+  toString: null,
+  valueOf: function() {
+    return "SIX";
+  }
+};
+assert.compareArray([].concat(obj), [], '[].concat({"1": "A", "3": "B", "5": "C"}) must return []');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/concat/Array.prototype.concat_array-like-string-length.js b/js/src/tests/test262/built-ins/Array/prototype/concat/Array.prototype.concat_array-like-string-length.js
new file mode 100644
index 0000000000..1aa0191efd
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/concat/Array.prototype.concat_array-like-string-length.js
@@ -0,0 +1,35 @@
+// Copyright (c) 2014 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.concat
+description: Array.prototype.concat array like string length
+includes: [compareArray.js]
+features: [Symbol.isConcatSpreadable]
+---*/
+var obj = {
+  "length": "6",
+  "1": "A",
+  "3": "B",
+  "5": "C"
+};
+obj[Symbol.isConcatSpreadable] = true;
+var obj2 = {
+  length: 3,
+  "0": "0",
+  "1": "1",
+  "2": "2"
+};
+var arr = ["X", "Y", "Z"];
+
+var expected = [
+  void 0, "A", void 0, "B", void 0, "C",
+  obj2,
+  "X", "Y", "Z"
+];
+var actual = Array.prototype.concat.call(obj, obj2, arr);
+
+assert.compareArray(actual, expected, 'The value of actual is expected to equal the value of expected');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/concat/Array.prototype.concat_array-like-to-length-throws.js b/js/src/tests/test262/built-ins/Array/prototype/concat/Array.prototype.concat_array-like-to-length-throws.js
new file mode 100644
index 0000000000..8aef650339
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/concat/Array.prototype.concat_array-like-to-length-throws.js
@@ -0,0 +1,31 @@
+// Copyright (c) 2014 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.concat
+description: Array.prototype.concat array like to length throws
+features: [Symbol.isConcatSpreadable]
+---*/
+var spreadableWithBrokenLength = {
+  "length": {
+    valueOf: null,
+    toString: null
+  },
+  "1": "A",
+  "3": "B",
+  "5": "C"
+};
+spreadableWithBrokenLength[Symbol.isConcatSpreadable] = true;
+var obj2 = {
+  length: 3,
+  "0": "0",
+  "1": "1",
+  "2": "2"
+};
+var arr = ["X", "Y", "Z"];
+assert.throws(TypeError, function() {
+  Array.prototype.concat.call(spreadableWithBrokenLength, obj2, arr);
+}, 'Array.prototype.concat.call(spreadableWithBrokenLength, obj2, arr) throws a TypeError exception');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/concat/Array.prototype.concat_array-like.js b/js/src/tests/test262/built-ins/Array/prototype/concat/Array.prototype.concat_array-like.js
new file mode 100644
index 0000000000..f188f17120
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/concat/Array.prototype.concat_array-like.js
@@ -0,0 +1,36 @@
+// Copyright (c) 2014 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+
+/*---
+esid: sec-array.prototype.concat
+description: Array.prototype.concat array like
+includes: [compareArray.js]
+features: [Symbol.isConcatSpreadable]
+---*/
+var obj = {
+  "length": 6,
+  "1": "A",
+  "3": "B",
+  "5": "C"
+};
+obj[Symbol.isConcatSpreadable] = true;
+var obj2 = {
+  length: 3,
+  "0": "0",
+  "1": "1",
+  "2": "2"
+};
+var arr = ["X", "Y", "Z"];
+
+var expected = [
+  void 0, "A", void 0, "B", void 0, "C",
+  obj2,
+  "X", "Y", "Z"
+];
+var actual = Array.prototype.concat.call(obj, obj2, arr);
+
+assert.compareArray(actual, expected, 'The value of actual is expected to equal the value of expected');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/concat/Array.prototype.concat_holey-sloppy-arguments.js b/js/src/tests/test262/built-ins/Array/prototype/concat/Array.prototype.concat_holey-sloppy-arguments.js
new file mode 100644
index 0000000000..5f8cbfaab4
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/concat/Array.prototype.concat_holey-sloppy-arguments.js
@@ -0,0 +1,21 @@
+// Copyright (c) 2014 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+
+/*---
+esid: sec-array.prototype.concat
+description: Array.prototype.concat holey sloppy arguments
+includes: [compareArray.js]
+features: [Symbol.isConcatSpreadable]
+---*/
+var args = (function(a) {
+  return arguments;
+})(1, 2, 3);
+delete args[1];
+args[Symbol.isConcatSpreadable] = true;
+assert.compareArray([1, void 0, 3, 1, void 0, 3], [].concat(args, args),
+  '[1, void 0, 3, 1, void 0, 3] must return the same value returned by [].concat(args, args)'
+);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/concat/Array.prototype.concat_large-typed-array.js b/js/src/tests/test262/built-ins/Array/prototype/concat/Array.prototype.concat_large-typed-array.js
new file mode 100644
index 0000000000..a4de0ef3a9
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/concat/Array.prototype.concat_large-typed-array.js
@@ -0,0 +1,52 @@
+// Copyright (c) 2014 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+
+/*---
+esid: sec-array.prototype.concat
+description: Array.prototype.concat large typed array
+includes: [compareArray.js]
+features: [Symbol.isConcatSpreadable]
+---*/
+function concatTypedArray(type, elems, modulo) {
+  var items = new Array(elems);
+  var ta_by_len = new type(elems);
+  for (var i = 0; i < elems; ++i) {
+    ta_by_len[i] = items[i] = modulo === false ? i : elems % modulo;
+  }
+  var ta = new type(items);
+  assert.compareArray([].concat(ta, ta), [ta, ta]);
+  ta[Symbol.isConcatSpreadable] = true;
+  assert.compareArray([].concat(ta), items);
+
+  assert.compareArray([].concat(ta_by_len, ta_by_len), [ta_by_len, ta_by_len]);
+  ta_by_len[Symbol.isConcatSpreadable] = true;
+  assert.compareArray([].concat(ta_by_len), items);
+
+  // TypedArray with fake `length`.
+  ta = new type(1);
+  var defValue = ta[0];
+  var expected = new Array(4000);
+  expected[0] = defValue;
+
+  Object.defineProperty(ta, "length", {
+    value: 4000
+  });
+  ta[Symbol.isConcatSpreadable] = true;
+  assert.compareArray([].concat(ta), expected);
+}
+
+// Float16Array cannot be included in this because it cannot precisely represent integers above 2048
+var max = [Math.pow(2, 8), Math.pow(2, 16), Math.pow(2, 32), false, false];
+[
+  Uint8Array,
+  Uint16Array,
+  Uint32Array,
+  Float32Array,
+  Float64Array
+].forEach(function(ctor, i) {
+  concatTypedArray(ctor, 4000, max[i]);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/concat/Array.prototype.concat_length-throws.js b/js/src/tests/test262/built-ins/Array/prototype/concat/Array.prototype.concat_length-throws.js
new file mode 100644
index 0000000000..6ff8e0b3e1
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/concat/Array.prototype.concat_length-throws.js
@@ -0,0 +1,27 @@
+// Copyright (c) 2014 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+
+/*---
+esid: sec-array.prototype.concat
+description: Array.prototype.concat length throws
+features: [Symbol.isConcatSpreadable]
+---*/
+var spreadablePoisonedLengthGetter = {};
+spreadablePoisonedLengthGetter[Symbol.isConcatSpreadable] = true;
+Object.defineProperty(spreadablePoisonedLengthGetter, "length", {
+  get: function() {
+    throw new Test262Error();
+  }
+});
+
+assert.throws(Test262Error, function() {
+  [].concat(spreadablePoisonedLengthGetter);
+}, '[].concat(spreadablePoisonedLengthGetter) throws a Test262Error exception');
+
+assert.throws(Test262Error, function() {
+  Array.prototype.concat.call(spreadablePoisonedLengthGetter, 1, 2, 3);
+}, 'Array.prototype.concat.call(spreadablePoisonedLengthGetter, 1, 2, 3) throws a Test262Error exception');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/concat/Array.prototype.concat_no-prototype.js b/js/src/tests/test262/built-ins/Array/prototype/concat/Array.prototype.concat_no-prototype.js
new file mode 100644
index 0000000000..bb5dd7277c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/concat/Array.prototype.concat_no-prototype.js
@@ -0,0 +1,16 @@
+// Copyright (c) 2014 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+
+/*---
+esid: sec-array.prototype.concat
+description: Array.prototype.concat no prototype
+---*/
+assert.sameValue(
+  Array.prototype.concat.prototype,
+  void 0,
+  'The value of Array.prototype.concat.prototype is expected to be void 0'
+);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/concat/Array.prototype.concat_non-array.js b/js/src/tests/test262/built-ins/Array/prototype/concat/Array.prototype.concat_non-array.js
new file mode 100644
index 0000000000..a6288b26d0
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/concat/Array.prototype.concat_non-array.js
@@ -0,0 +1,31 @@
+// Copyright (c) 2014 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+
+/*---
+esid: sec-array.prototype.concat
+description: array-concat-non-array
+includes: [compareArray.js]
+---*/
+
+//
+// test262 --command "v8 --harmony-classes  --harmony_object_literals" array-concat-non-array
+//
+class NonArray {
+  constructor() {
+    Array.apply(this, arguments);
+  }
+}
+
+var obj = new NonArray(1, 2, 3);
+var result = Array.prototype.concat.call(obj, 4, 5, 6);
+assert.sameValue(Array, result.constructor, 'The value of Array is expected to equal the value of result.constructor');
+assert.sameValue(
+  result instanceof NonArray,
+  false,
+  'The result of evaluating (result instanceof NonArray) is expected to be false'
+);
+assert.compareArray(result, [obj, 4, 5, 6], 'The value of result is expected to be [obj, 4, 5, 6]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/concat/Array.prototype.concat_sloppy-arguments-throws.js b/js/src/tests/test262/built-ins/Array/prototype/concat/Array.prototype.concat_sloppy-arguments-throws.js
new file mode 100644
index 0000000000..72a67f4295
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/concat/Array.prototype.concat_sloppy-arguments-throws.js
@@ -0,0 +1,24 @@
+// Copyright (c) 2014 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+
+/*---
+esid: sec-array.prototype.concat
+description: Array.prototype.concat sloppy arguments throws
+features: [Symbol.isConcatSpreadable]
+---*/
+var args = (function(a) {
+  return arguments;
+})(1, 2, 3);
+Object.defineProperty(args, 0, {
+  get: function() {
+    throw new Test262Error();
+  }
+});
+args[Symbol.isConcatSpreadable] = true;
+assert.throws(Test262Error, function() {
+  return [].concat(args, args);
+}, 'return [].concat(args, args) throws a Test262Error exception');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/concat/Array.prototype.concat_sloppy-arguments-with-dupes.js b/js/src/tests/test262/built-ins/Array/prototype/concat/Array.prototype.concat_sloppy-arguments-with-dupes.js
new file mode 100644
index 0000000000..36af587993
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/concat/Array.prototype.concat_sloppy-arguments-with-dupes.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2014 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+
+/*---
+esid: sec-array.prototype.concat
+description: Array.prototype.concat sloppy arguments with dupes
+flags: [noStrict]
+includes: [compareArray.js]
+features: [Symbol.isConcatSpreadable]
+---*/
+var args = (function(a, a, a) {
+  return arguments;
+})(1, 2, 3);
+args[Symbol.isConcatSpreadable] = true;
+assert.compareArray([].concat(args, args), [1, 2, 3, 1, 2, 3],
+  '[].concat((function(a, a, a) {return arguments;})(1, 2, 3), (function(a, a, a) {return arguments;})(1, 2, 3)) must return [1, 2, 3, 1, 2, 3]'
+);
+
+Object.defineProperty(args, "length", {
+  value: 6
+});
+assert.compareArray([].concat(args), [1, 2, 3, void 0, void 0, void 0],
+  '[].concat((function(a, a, a) {return arguments;})(1, 2, 3)) must return [1, 2, 3, void 0, void 0, void 0]'
+);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/concat/Array.prototype.concat_sloppy-arguments.js b/js/src/tests/test262/built-ins/Array/prototype/concat/Array.prototype.concat_sloppy-arguments.js
new file mode 100644
index 0000000000..1027774fde
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/concat/Array.prototype.concat_sloppy-arguments.js
@@ -0,0 +1,27 @@
+// Copyright (c) 2014 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+
+/*---
+esid: sec-array.prototype.concat
+description: Array.prototype.concat sloppy arguments
+includes: [compareArray.js]
+features: [Symbol.isConcatSpreadable]
+---*/
+var args = (function(a, b, c) {
+  return arguments;
+})(1, 2, 3);
+args[Symbol.isConcatSpreadable] = true;
+assert.compareArray([].concat(args, args), [1, 2, 3, 1, 2, 3],
+  '[].concat((function(a, b, c) {return arguments;})(1, 2, 3), (function(a, b, c) {return arguments;})(1, 2, 3)) must return [1, 2, 3, 1, 2, 3]'
+);
+
+Object.defineProperty(args, "length", {
+  value: 6
+});
+assert.compareArray([].concat(args), [1, 2, 3, void 0, void 0, void 0],
+  '[].concat((function(a, b, c) {return arguments;})(1, 2, 3)) must return [1, 2, 3, void 0, void 0, void 0]'
+);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/concat/Array.prototype.concat_small-typed-array.js b/js/src/tests/test262/built-ins/Array/prototype/concat/Array.prototype.concat_small-typed-array.js
new file mode 100644
index 0000000000..2bb8b17ef3
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/concat/Array.prototype.concat_small-typed-array.js
@@ -0,0 +1,56 @@
+// Copyright (c) 2014 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+
+/*---
+esid: sec-array.prototype.concat
+description: Array.prototype.concat small typed array
+includes: [compareArray.js]
+features: [Symbol.isConcatSpreadable]
+---*/
+function concatTypedArray(type, elems, modulo) {
+  var items = new Array(elems);
+  var ta_by_len = new type(elems);
+  for (var i = 0; i < elems; ++i) {
+    ta_by_len[i] = items[i] = modulo === false ? i : elems % modulo;
+  }
+  var ta = new type(items);
+  assert.compareArray([].concat(ta, ta), [ta, ta]);
+  ta[Symbol.isConcatSpreadable] = true;
+  assert.compareArray([].concat(ta), items);
+
+  assert.compareArray([].concat(ta_by_len, ta_by_len), [ta_by_len, ta_by_len]);
+  ta_by_len[Symbol.isConcatSpreadable] = true;
+  assert.compareArray([].concat(ta_by_len), items);
+
+  // TypedArray with fake `length`.
+  ta = new type(1);
+  var defValue = ta[0];
+  var expected = new Array(4000);
+  expected[0] = defValue;
+
+  Object.defineProperty(ta, "length", {
+    value: 4000
+  });
+  ta[Symbol.isConcatSpreadable] = true;
+  assert.compareArray([].concat(ta), expected);
+}
+var max = [Math.pow(2, 8), Math.pow(2, 16), Math.pow(2, 32), false, false];
+var TAs = [
+  Uint8Array,
+  Uint16Array,
+  Uint32Array,
+  Float32Array,
+  Float64Array
+];
+if (typeof Float16Array !== 'undefined') {
+  max.push(false);
+  TAs.push(Float16Array);
+}
+
+TAs.forEach(function(ctor, i) {
+  concatTypedArray(ctor, 1, max[i]);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/concat/Array.prototype.concat_spreadable-boolean-wrapper.js b/js/src/tests/test262/built-ins/Array/prototype/concat/Array.prototype.concat_spreadable-boolean-wrapper.js
new file mode 100644
index 0000000000..1a1c8cbdcf
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/concat/Array.prototype.concat_spreadable-boolean-wrapper.js
@@ -0,0 +1,45 @@
+// Copyright (c) 2014 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+
+/*---
+esid: sec-array.prototype.concat
+description: Array.prototype.concat Symbol.isConcatSpreadable boolean wrapper
+includes: [compareArray.js]
+features: [Symbol.isConcatSpreadable]
+---*/
+var bool = new Boolean(true)
+// Boolean wrapper objects are not concat-spreadable by default
+assert.compareArray([bool], [].concat(bool), '[bool] must return the same value returned by [].concat(bool)');
+
+// Boolean wrapper objects may be individually concat-spreadable
+bool[Symbol.isConcatSpreadable] = true;
+bool.length = 3;
+bool[0] = 1, bool[1] = 2, bool[2] = 3;
+assert.compareArray([1, 2, 3], [].concat(bool),
+  '[1, 2, 3] must return the same value returned by [].concat(bool)'
+);
+
+Boolean.prototype[Symbol.isConcatSpreadable] = true;
+// Boolean wrapper objects may be concat-spreadable
+assert.compareArray([], [].concat(new Boolean(true)),
+  '[] must return the same value returned by [].concat(new Boolean(true))'
+);
+Boolean.prototype[0] = 1;
+Boolean.prototype[1] = 2;
+Boolean.prototype[2] = 3;
+Boolean.prototype.length = 3;
+assert.compareArray([1, 2, 3], [].concat(new Boolean(true)),
+  '[1, 2, 3] must return the same value returned by [].concat(new Boolean(true))'
+);
+
+// Boolean values are never concat-spreadable
+assert.compareArray([true], [].concat(true), '[true] must return the same value returned by [].concat(true)');
+delete Boolean.prototype[Symbol.isConcatSpreadable];
+delete Boolean.prototype[0];
+delete Boolean.prototype[1];
+delete Boolean.prototype[2];
+delete Boolean.prototype.length;
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/concat/Array.prototype.concat_spreadable-function.js b/js/src/tests/test262/built-ins/Array/prototype/concat/Array.prototype.concat_spreadable-function.js
new file mode 100644
index 0000000000..6f692548b2
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/concat/Array.prototype.concat_spreadable-function.js
@@ -0,0 +1,38 @@
+// Copyright (c) 2014 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+
+/*---
+esid: sec-array.prototype.concat
+description: Array.prototype.concat Symbol.isConcatSpreadable function
+includes: [compareArray.js]
+features: [Symbol.isConcatSpreadable]
+---*/
+var fn = function(a, b, c) {}
+// Functions are not concat-spreadable by default
+assert.compareArray([fn], [].concat(fn), '[fn] must return the same value returned by [].concat(fn)');
+
+// Functions may be individually concat-spreadable
+fn[Symbol.isConcatSpreadable] = true;
+fn[0] = 1, fn[1] = 2, fn[2] = 3;
+assert.compareArray([1, 2, 3], [].concat(fn), '[1, 2, 3] must return the same value returned by [].concat(fn)');
+
+Function.prototype[Symbol.isConcatSpreadable] = true;
+// Functions may be concat-spreadable
+assert.compareArray([void 0, void 0, void 0], [].concat(function(a, b, c) {}),
+  '[void 0, void 0, void 0] must return the same value returned by [].concat(function(a, b, c) {})'
+);
+Function.prototype[0] = 1;
+Function.prototype[1] = 2;
+Function.prototype[2] = 3;
+assert.compareArray([1, 2, 3], [].concat(function(a, b, c) {}),
+  '[1, 2, 3] must return the same value returned by [].concat(function(a, b, c) {})'
+);
+
+delete Function.prototype[Symbol.isConcatSpreadable];
+delete Function.prototype[0];
+delete Function.prototype[1];
+delete Function.prototype[2];
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/concat/Array.prototype.concat_spreadable-getter-throws.js b/js/src/tests/test262/built-ins/Array/prototype/concat/Array.prototype.concat_spreadable-getter-throws.js
new file mode 100644
index 0000000000..7027cb04da
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/concat/Array.prototype.concat_spreadable-getter-throws.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2014 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+
+/*---
+esid: sec-array.prototype.concat
+description: Array.prototype.concat Symbol.isConcatSpreadable getter throws
+features: [Symbol.isConcatSpreadable]
+---*/
+var spreadablePoisonedGetter = {};
+Object.defineProperty(spreadablePoisonedGetter, Symbol.isConcatSpreadable, {
+  get: function() {
+    throw new Test262Error();
+  }
+});
+
+assert.throws(Test262Error, function() {
+  [].concat(spreadablePoisonedGetter);
+}, '[].concat(spreadablePoisonedGetter) throws a Test262Error exception');
+
+assert.throws(Test262Error, function() {
+  Array.prototype.concat.call(spreadablePoisonedGetter, 1, 2, 3);
+}, 'Array.prototype.concat.call(spreadablePoisonedGetter, 1, 2, 3) throws a Test262Error exception');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/concat/Array.prototype.concat_spreadable-number-wrapper.js b/js/src/tests/test262/built-ins/Array/prototype/concat/Array.prototype.concat_spreadable-number-wrapper.js
new file mode 100644
index 0000000000..08923aa009
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/concat/Array.prototype.concat_spreadable-number-wrapper.js
@@ -0,0 +1,43 @@
+// Copyright (c) 2014 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+
+/*---
+esid: sec-array.prototype.concat
+description: Array.prototype.concat Symbol.isConcatSpreadable number wrapper
+includes: [compareArray.js]
+features: [Symbol.isConcatSpreadable]
+---*/
+var num = new Number(true)
+// Number wrapper objects are not concat-spreadable by default
+assert.compareArray([num], [].concat(num), '[num] must return the same value returned by [].concat(num)');
+
+// Number wrapper objects may be individually concat-spreadable
+num[Symbol.isConcatSpreadable] = true;
+num.length = 3;
+num[0] = 1, num[1] = 2, num[2] = 3;
+assert.compareArray([1, 2, 3], [].concat(num), '[1, 2, 3] must return the same value returned by [].concat(num)');
+
+Number.prototype[Symbol.isConcatSpreadable] = true;
+// Number wrapper objects may be concat-spreadable
+assert.compareArray([], [].concat(new Number(123)),
+  '[] must return the same value returned by [].concat(new Number(123))'
+);
+Number.prototype[0] = 1;
+Number.prototype[1] = 2;
+Number.prototype[2] = 3;
+Number.prototype.length = 3;
+assert.compareArray([1, 2, 3], [].concat(new Number(123)),
+  '[1, 2, 3] must return the same value returned by [].concat(new Number(123))'
+);
+
+// Number values are never concat-spreadable
+assert.compareArray([true], [].concat(true), '[true] must return the same value returned by [].concat(true)');
+delete Number.prototype[Symbol.isConcatSpreadable];
+delete Number.prototype[0];
+delete Number.prototype[1];
+delete Number.prototype[2];
+delete Number.prototype.length;
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/concat/Array.prototype.concat_spreadable-reg-exp.js b/js/src/tests/test262/built-ins/Array/prototype/concat/Array.prototype.concat_spreadable-reg-exp.js
new file mode 100644
index 0000000000..dca75da974
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/concat/Array.prototype.concat_spreadable-reg-exp.js
@@ -0,0 +1,41 @@
+// Copyright (c) 2014 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+
+/*---
+esid: sec-array.prototype.concat
+description: Array.prototype.concat Symbol.isConcatSpreadable reg exp
+includes: [compareArray.js]
+features: [Symbol.isConcatSpreadable]
+---*/
+var re = /abc/;
+// RegExps are not concat-spreadable by default
+assert.compareArray([].concat(re), [re], '[].concat(/abc/) must return [re]');
+
+// RegExps may be individually concat-spreadable
+re[Symbol.isConcatSpreadable] = true;
+re[0] = 1, re[1] = 2, re[2] = 3, re.length = 3;
+assert.compareArray([].concat(re), [1, 2, 3], '[].concat(/abc/) must return [1, 2, 3]');
+
+// RegExps may be concat-spreadable
+RegExp.prototype[Symbol.isConcatSpreadable] = true;
+RegExp.prototype.length = 3;
+
+assert.compareArray([].concat(/abc/), [void 0, void 0, void 0],
+  '[].concat(/abc/) must return [void 0, void 0, void 0]'
+);
+RegExp.prototype[0] = 1;
+RegExp.prototype[1] = 2;
+RegExp.prototype[2] = 3;
+assert.compareArray([].concat(/abc/), [1, 2, 3],
+  '[].concat(/abc/) must return [1, 2, 3]'
+);
+
+delete RegExp.prototype[Symbol.isConcatSpreadable];
+delete RegExp.prototype[0];
+delete RegExp.prototype[1];
+delete RegExp.prototype[2];
+delete RegExp.prototype.length;
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/concat/Array.prototype.concat_spreadable-sparse-object.js b/js/src/tests/test262/built-ins/Array/prototype/concat/Array.prototype.concat_spreadable-sparse-object.js
new file mode 100644
index 0000000000..1ede626d06
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/concat/Array.prototype.concat_spreadable-sparse-object.js
@@ -0,0 +1,25 @@
+// Copyright (c) 2014 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+
+/*---
+esid: sec-array.prototype.concat
+description: Array.prototype.concat Symbol.isConcatSpreadable sparse object
+includes: [compareArray.js]
+features: [Symbol.isConcatSpreadable]
+---*/
+var obj = {
+  length: 5
+};
+obj[Symbol.isConcatSpreadable] = true;
+assert.compareArray([void 0, void 0, void 0, void 0, void 0], [].concat(obj),
+  '[void 0, void 0, void 0, void 0, void 0] must return the same value returned by [].concat(obj)'
+);
+
+obj.length = 4000;
+assert.compareArray(new Array(4000), [].concat(obj),
+  'new Array(4000) must return the same value returned by [].concat(obj)'
+);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/concat/Array.prototype.concat_spreadable-string-wrapper.js b/js/src/tests/test262/built-ins/Array/prototype/concat/Array.prototype.concat_spreadable-string-wrapper.js
new file mode 100644
index 0000000000..e44fbc769a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/concat/Array.prototype.concat_spreadable-string-wrapper.js
@@ -0,0 +1,34 @@
+// Copyright (c) 2014 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+
+/*---
+esid: sec-array.prototype.concat
+description: Array.prototype.concat Symbol.isConcatSpreadable string wrapper
+includes: [compareArray.js]
+features: [Symbol.isConcatSpreadable]
+---*/
+var str1 = new String("yuck\uD83D\uDCA9")
+// String wrapper objects are not concat-spreadable by default
+assert.compareArray([str1], [].concat(str1), '[str1] must return the same value returned by [].concat(str1)');
+
+// String wrapper objects may be individually concat-spreadable
+str1[Symbol.isConcatSpreadable] = true;
+assert.compareArray(["y", "u", "c", "k", "\uD83D", "\uDCA9"], [].concat(str1),
+  '["y", "u", "c", "k", "uD83D", "uDCA9"] must return the same value returned by [].concat(str1)'
+);
+
+String.prototype[Symbol.isConcatSpreadable] = true;
+// String wrapper objects may be concat-spreadable
+assert.compareArray(["y", "u", "c", "k", "\uD83D", "\uDCA9"], [].concat(new String("yuck\uD83D\uDCA9")),
+  '["y", "u", "c", "k", "uD83D", "uDCA9"] must return the same value returned by [].concat(new String("yuckuD83DuDCA9"))'
+);
+
+// String values are never concat-spreadable
+assert.compareArray(["yuck\uD83D\uDCA9"], [].concat("yuck\uD83D\uDCA9"),
+  '["yuckuD83DuDCA9"] must return the same value returned by [].concat("yuckuD83DuDCA9")'
+);
+delete String.prototype[Symbol.isConcatSpreadable];
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/concat/Array.prototype.concat_strict-arguments.js b/js/src/tests/test262/built-ins/Array/prototype/concat/Array.prototype.concat_strict-arguments.js
new file mode 100644
index 0000000000..34f81f0a45
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/concat/Array.prototype.concat_strict-arguments.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2014 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+
+/*---
+esid: sec-array.prototype.concat
+description: Array.prototype.concat strict arguments
+includes: [compareArray.js]
+features: [Symbol.isConcatSpreadable]
+---*/
+var args = (function(a, b, c) {
+  "use strict";
+  return arguments;
+})(1, 2, 3);
+args[Symbol.isConcatSpreadable] = true;
+assert.compareArray([].concat(args, args), [1, 2, 3, 1, 2, 3],
+  '[].concat("(function(a, b, c) {"use strict"; return arguments;})(1, 2, 3)", "(function(a, b, c) {"use strict"; return arguments;})(1, 2, 3)") must return [1, 2, 3, 1, 2, 3]'
+);
+
+Object.defineProperty(args, "length", {
+  value: 6
+});
+assert.compareArray([].concat(args), [1, 2, 3, void 0, void 0, void 0],
+  '[].concat("(function(a, b, c) {"use strict"; return arguments;})(1, 2, 3)") must return [1, 2, 3, void 0, void 0, void 0]'
+);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/concat/S15.4.4.4_A1_T1.js b/js/src/tests/test262/built-ins/Array/prototype/concat/S15.4.4.4_A1_T1.js
new file mode 100644
index 0000000000..7d4bd82f39
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/concat/S15.4.4.4_A1_T1.js
@@ -0,0 +1,28 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.concat
+info: |
+    When the concat method is called with zero or more arguments item1, item2,
+    etc., it returns an array containing the array elements of the object followed by
+    the array elements of each argument in order
+es5id: 15.4.4.4_A1_T1
+description: Checking this algorithm, items are Array object
+---*/
+
+var x = new Array();
+var y = new Array(0, 1);
+var z = new Array(2, 3, 4);
+var arr = x.concat(y, z);
+
+arr.getClass = Object.prototype.toString;
+assert.sameValue(arr.getClass(), "[object Array]", 'arr.getClass() must return "[object Array]"');
+assert.sameValue(arr[0], 0, 'The value of arr[0] is expected to be 0');
+assert.sameValue(arr[1], 1, 'The value of arr[1] is expected to be 1');
+assert.sameValue(arr[2], 2, 'The value of arr[2] is expected to be 2');
+assert.sameValue(arr[3], 3, 'The value of arr[3] is expected to be 3');
+assert.sameValue(arr[4], 4, 'The value of arr[4] is expected to be 4');
+assert.sameValue(arr.length, 5, 'The value of arr.length is expected to be 5');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/concat/S15.4.4.4_A1_T2.js b/js/src/tests/test262/built-ins/Array/prototype/concat/S15.4.4.4_A1_T2.js
new file mode 100644
index 0000000000..1ac86bfd21
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/concat/S15.4.4.4_A1_T2.js
@@ -0,0 +1,30 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.concat
+info: |
+    When the concat method is called with zero or more arguments item1, item2,
+    etc., it returns an array containing the array elements of the object followed by
+    the array elements of each argument in order
+es5id: 15.4.4.4_A1_T2
+description: Checking this algorithm, items are objects and primitives
+---*/
+
+var x = [0];
+var y = new Object();
+var z = new Array(1, 2);
+var arr = x.concat(y, z, -1, true, "NaN");
+
+arr.getClass = Object.prototype.toString;
+assert.sameValue(arr.getClass(), "[object Array]", 'arr.getClass() must return "[object Array]"');
+assert.sameValue(arr[0], 0, 'The value of arr[0] is expected to be 0');
+assert.sameValue(arr[1], y, 'The value of arr[1] is expected to equal the value of y');
+assert.sameValue(arr[2], 1, 'The value of arr[2] is expected to be 1');
+assert.sameValue(arr[3], 2, 'The value of arr[3] is expected to be 2');
+assert.sameValue(arr[4], -1, 'The value of arr[4] is expected to be -1');
+assert.sameValue(arr[5], true, 'The value of arr[5] is expected to be true');
+assert.sameValue(arr[6], "NaN", 'The value of arr[6] is expected to be "NaN"');
+assert.sameValue(arr.length, 7, 'The value of arr.length is expected to be 7');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/concat/S15.4.4.4_A1_T3.js b/js/src/tests/test262/built-ins/Array/prototype/concat/S15.4.4.4_A1_T3.js
new file mode 100644
index 0000000000..efcd31f65d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/concat/S15.4.4.4_A1_T3.js
@@ -0,0 +1,24 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.concat
+info: |
+    When the concat method is called with zero or more arguments item1, item2,
+    etc., it returns an array containing the array elements of the object followed by
+    the array elements of each argument in order
+es5id: 15.4.4.4_A1_T3
+description: Checking this algorithm with no items
+---*/
+
+var x = [0, 1];
+var arr = x.concat();
+
+arr.getClass = Object.prototype.toString;
+assert.sameValue(arr.getClass(), "[object Array]", 'arr.getClass() must return "[object Array]"');
+assert.sameValue(arr[0], 0, 'The value of arr[0] is expected to be 0');
+assert.sameValue(arr[1], 1, 'The value of arr[1] is expected to be 1');
+assert.sameValue(arr.length, 2, 'The value of arr.length is expected to be 2');
+assert.notSameValue(arr, x, 'The value of arr is expected to not equal the value of `x`');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/concat/S15.4.4.4_A1_T4.js b/js/src/tests/test262/built-ins/Array/prototype/concat/S15.4.4.4_A1_T4.js
new file mode 100644
index 0000000000..be7c04c42e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/concat/S15.4.4.4_A1_T4.js
@@ -0,0 +1,24 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.concat
+info: |
+    When the concat method is called with zero or more arguments item1, item2,
+    etc., it returns an array containing the array elements of the object followed by
+    the array elements of each argument in order
+es5id: 15.4.4.4_A1_T4
+description: Checking this algorithm, items are [], [,]
+---*/
+
+var x = [, 1];
+var arr = x.concat([], [, ]);
+
+arr.getClass = Object.prototype.toString;
+assert.sameValue(arr.getClass(), "[object Array]", 'arr.getClass() must return "[object Array]"');
+assert.sameValue(arr[0], undefined, 'The value of arr[0] is expected to equal undefined');
+assert.sameValue(arr[1], 1, 'The value of arr[1] is expected to be 1');
+assert.sameValue(arr[2], undefined, 'The value of arr[2] is expected to equal undefined');
+assert.sameValue(arr.length, 3, 'The value of arr.length is expected to be 3');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/concat/S15.4.4.4_A2_T1.js b/js/src/tests/test262/built-ins/Array/prototype/concat/S15.4.4.4_A2_T1.js
new file mode 100644
index 0000000000..8cf2de37a2
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/concat/S15.4.4.4_A2_T1.js
@@ -0,0 +1,30 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.concat
+info: |
+    The concat function is intentionally generic.
+    It does not require that its this value be an Array object
+es5id: 15.4.4.4_A2_T1
+description: Checking this for Object object, items are objects and primitives
+---*/
+
+var x = {};
+x.concat = Array.prototype.concat;
+var y = new Object();
+var z = new Array(1, 2);
+var arr = x.concat(y, z, -1, true, "NaN");
+
+arr.getClass = Object.prototype.toString;
+assert.sameValue(arr.getClass(), "[object Array]", 'arr.getClass() must return "[object Array]"');
+assert.sameValue(arr[0], x, 'The value of arr[0] is expected to equal the value of x');
+assert.sameValue(arr[1], y, 'The value of arr[1] is expected to equal the value of y');
+assert.sameValue(arr[2], 1, 'The value of arr[2] is expected to be 1');
+assert.sameValue(arr[3], 2, 'The value of arr[3] is expected to be 2');
+assert.sameValue(arr[4], -1, 'The value of arr[4] is expected to be -1');
+assert.sameValue(arr[5], true, 'The value of arr[5] is expected to be true');
+assert.sameValue(arr[6], "NaN", 'The value of arr[6] is expected to be "NaN"');
+assert.sameValue(arr.length, 7, 'The value of arr.length is expected to be 7');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/concat/S15.4.4.4_A2_T2.js b/js/src/tests/test262/built-ins/Array/prototype/concat/S15.4.4.4_A2_T2.js
new file mode 100644
index 0000000000..8d0efd6b2f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/concat/S15.4.4.4_A2_T2.js
@@ -0,0 +1,22 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.concat
+info: |
+    The concat function is intentionally generic.
+    It does not require that its this value be an Array object
+es5id: 15.4.4.4_A2_T2
+description: Checking this for Object object with no items
+---*/
+
+var x = {};
+x.concat = Array.prototype.concat;
+var arr = x.concat();
+
+arr.getClass = Object.prototype.toString;
+assert.sameValue(arr.getClass(), "[object Array]", 'arr.getClass() must return "[object Array]"');
+assert.sameValue(arr[0], x, 'The value of arr[0] is expected to equal the value of x');
+assert.sameValue(arr.length, 1, 'The value of arr.length is expected to be 1');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/concat/S15.4.4.4_A3_T1.js b/js/src/tests/test262/built-ins/Array/prototype/concat/S15.4.4.4_A3_T1.js
new file mode 100644
index 0000000000..34ef8926c9
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/concat/S15.4.4.4_A3_T1.js
@@ -0,0 +1,34 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.concat
+info: "[[Get]] from not an inherited property"
+es5id: 15.4.4.4_A3_T1
+description: >
+    [[Prototype]] of Array instance is Array.prototype, [[Prototype]
+    of Array.prototype is Object.prototype
+---*/
+
+Array.prototype[1] = 1;
+var x = [0];
+x.length = 2;
+var arr = x.concat();
+
+assert.sameValue(arr[0], 0, 'The value of arr[0] is expected to be 0');
+assert.sameValue(arr[1], 1, 'The value of arr[1] is expected to be 1');
+assert.sameValue(arr.hasOwnProperty('1'), true, 'arr.hasOwnProperty("1") must return true');
+
+Object.prototype[1] = 1;
+Object.prototype.length = 2;
+Object.prototype.concat = Array.prototype.concat;
+x = {
+  0: 0
+};
+var arr = x.concat();
+
+assert.sameValue(arr[0], x, 'The value of arr[0] is expected to equal the value of x');
+assert.sameValue(arr[1], 1, 'The value of arr[1] is expected to be 1');
+assert.sameValue(arr.hasOwnProperty('1'), false, 'arr.hasOwnProperty("1") must return false');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/concat/S15.4.4.4_A3_T2.js b/js/src/tests/test262/built-ins/Array/prototype/concat/S15.4.4.4_A3_T2.js
new file mode 100644
index 0000000000..858b6080b0
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/concat/S15.4.4.4_A3_T2.js
@@ -0,0 +1,37 @@
+// Copyright (c) 2014 Ecma International.  All rights reserved.
+// See LICENSE or https://github.com/tc39/test262/blob/HEAD/LICENSE
+
+/*---
+esid: sec-array.prototype.concat
+info: Array.prototype.concat uses [[Get]] on 'length' to determine array length
+es5id: 15.4.4.4_A3_T2
+description: >
+  checking whether non-ownProperties are seen, copied by Array.prototype.concat: Array.prototype[1]
+---*/
+
+var a = [0];
+
+assert.sameValue(a.length, 1, 'The value of a.length is expected to be 1');
+
+a.length = 3;
+
+assert.sameValue(a[1], undefined, 'The value of a[1] is expected to equal undefined');
+assert.sameValue(a[2], undefined, 'The value of a[2] is expected to equal undefined');
+
+Array.prototype[2] = 2;
+
+assert.sameValue(a[1], undefined, 'The value of a[1] is expected to equal undefined');
+assert.sameValue(a[2], 2, 'The value of a[2] is expected to be 2');
+assert.sameValue(a.hasOwnProperty('1'), false, 'a.hasOwnProperty("1") must return false');
+assert.sameValue(a.hasOwnProperty('2'), false, 'a.hasOwnProperty("2") must return false');
+
+var b = a.concat();
+
+assert.sameValue(b.length, 3, 'The value of b.length is expected to be 3');
+assert.sameValue(b[0], 0, 'The value of b[0] is expected to be 0');
+assert.sameValue(b[1], undefined, 'The value of b[1] is expected to equal undefined');
+assert.sameValue(b[2], 2, 'The value of b[2] is expected to be 2');
+assert.sameValue(b.hasOwnProperty('1'), false, 'b.hasOwnProperty("1") must return false');
+assert.sameValue(b.hasOwnProperty('2'), true, 'b.hasOwnProperty("2") must return true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/concat/S15.4.4.4_A3_T3.js b/js/src/tests/test262/built-ins/Array/prototype/concat/S15.4.4.4_A3_T3.js
new file mode 100644
index 0000000000..270a2a0137
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/concat/S15.4.4.4_A3_T3.js
@@ -0,0 +1,37 @@
+// Copyright (c) 2014 Ecma International.  All rights reserved.
+// See LICENSE or https://github.com/tc39/test262/blob/HEAD/LICENSE
+
+/*---
+esid: sec-array.prototype.concat
+info: Array.prototype.concat uses [[Get]] on 'length' to determine array length
+es5id: 15.4.4.4_A3_T3
+description: >
+  checking whether non-ownProperties are seen, copied by Array.prototype.concat: Object.prototype[1]
+---*/
+
+var a = [0];
+
+assert.sameValue(a.length, 1, 'The value of a.length is expected to be 1');
+
+a.length = 3;
+
+assert.sameValue(a[1], undefined, 'The value of a[1] is expected to equal undefined');
+assert.sameValue(a[2], undefined, 'The value of a[2] is expected to equal undefined');
+
+Object.prototype[2] = 2;
+
+assert.sameValue(a[1], undefined, 'The value of a[1] is expected to equal undefined');
+assert.sameValue(a[2], 2, 'The value of a[2] is expected to be 2');
+assert.sameValue(a.hasOwnProperty('1'), false, 'a.hasOwnProperty("1") must return false');
+assert.sameValue(a.hasOwnProperty('2'), false, 'a.hasOwnProperty("2") must return false');
+
+var b = a.concat();
+
+assert.sameValue(b.length, 3, 'The value of b.length is expected to be 3');
+assert.sameValue(b[0], 0, 'The value of b[0] is expected to be 0');
+assert.sameValue(b[1], undefined, 'The value of b[1] is expected to equal undefined');
+assert.sameValue(b[2], 2, 'The value of b[2] is expected to be 2');
+assert.sameValue(b.hasOwnProperty('1'), false, 'b.hasOwnProperty("1") must return false');
+assert.sameValue(b.hasOwnProperty('2'), true, 'b.hasOwnProperty("2") must return true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/concat/arg-length-exceeding-integer-limit.js b/js/src/tests/test262/built-ins/Array/prototype/concat/arg-length-exceeding-integer-limit.js
new file mode 100644
index 0000000000..3e997498e9
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/concat/arg-length-exceeding-integer-limit.js
@@ -0,0 +1,42 @@
+// Copyright (C) 2020 Alexey Shvayka. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.concat
+description: >
+  TypeError is thrown if "length" of result array exceeds 2^53 - 1.
+info: |
+  Array.prototype.concat ( ...arguments )
+
+  [...]
+  5. Repeat, while items is not empty
+    [...]
+    c. If spreadable is true, then
+      [...]
+      ii. Let len be ? LengthOfArrayLike(E).
+      iii. If n + len > 2^53 - 1, throw a TypeError exception.
+    [...]
+features: [Symbol.isConcatSpreadable, Proxy]
+---*/
+
+var spreadableLengthOutOfRange = {};
+spreadableLengthOutOfRange.length = Number.MAX_SAFE_INTEGER;
+spreadableLengthOutOfRange[Symbol.isConcatSpreadable] = true;
+
+assert.throws(TypeError, function() {
+  [1].concat(spreadableLengthOutOfRange);
+}, '[1].concat(spreadableLengthOutOfRange) throws a TypeError exception');
+
+var proxyForArrayWithLengthOutOfRange = new Proxy([], {
+  get: function(_target, key) {
+    if (key === "length") {
+      return Number.MAX_SAFE_INTEGER;
+    }
+  },
+});
+
+assert.throws(TypeError, function() {
+  [].concat(1, proxyForArrayWithLengthOutOfRange);
+}, '[].concat(1, proxyForArrayWithLengthOutOfRange) throws a TypeError exception');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/concat/arg-length-near-integer-limit.js b/js/src/tests/test262/built-ins/Array/prototype/concat/arg-length-near-integer-limit.js
new file mode 100644
index 0000000000..438f520e16
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/concat/arg-length-near-integer-limit.js
@@ -0,0 +1,39 @@
+// Copyright (C) 2020 Alexey Shvayka. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.concat
+description: >
+  Elements are copied from a spreadable array-like object
+  whose "length" property is near the integer limit.
+info: |
+  Array.prototype.concat ( ...arguments )
+
+  [...]
+  5. Repeat, while items is not empty
+    [...]
+    c. If spreadable is true, then
+      [...]
+      ii. Let len be ? LengthOfArrayLike(E).
+      iii. If n + len > 2^53 - 1, throw a TypeError exception.
+      iv. Repeat, while k < len
+        [...]
+        3. If exists is true, then
+          a. Let subElement be ? Get(E, P).
+    [...]
+features: [Symbol.isConcatSpreadable]
+---*/
+
+var spreadableHasPoisonedIndex = {
+  length: Number.MAX_SAFE_INTEGER,
+  get 0() {
+    throw new Test262Error();
+  },
+};
+spreadableHasPoisonedIndex[Symbol.isConcatSpreadable] = true;
+
+assert.throws(Test262Error, function() {
+  [].concat(spreadableHasPoisonedIndex);
+}, '[].concat(spreadableHasPoisonedIndex) throws a Test262Error exception');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/concat/browser.js b/js/src/tests/test262/built-ins/Array/prototype/concat/browser.js
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/js/src/tests/test262/built-ins/Array/prototype/concat/call-with-boolean.js b/js/src/tests/test262/built-ins/Array/prototype/concat/call-with-boolean.js
new file mode 100644
index 0000000000..4f2f0bdbd1
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/concat/call-with-boolean.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2020 Rick Waldron.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.concat
+description: Array.prototype.concat applied to boolean primitive
+---*/
+
+assert.sameValue(
+  Array.prototype.concat.call(true)[0] instanceof Boolean,
+  true,
+  'The result of evaluating (Array.prototype.concat.call(true)[0] instanceof Boolean) is expected to be true'
+);
+assert.sameValue(
+  Array.prototype.concat.call(false)[0] instanceof Boolean,
+  true,
+  'The result of evaluating (Array.prototype.concat.call(false)[0] instanceof Boolean) is expected to be true'
+);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/concat/create-ctor-non-object.js b/js/src/tests/test262/built-ins/Array/prototype/concat/create-ctor-non-object.js
new file mode 100644
index 0000000000..e903ec6b66
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/concat/create-ctor-non-object.js
@@ -0,0 +1,44 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.concat
+description: >
+    Behavior when `constructor` property is neither an Object nor undefined
+info: |
+    1. Let O be ? ToObject(this value).
+    2. Let A be ? ArraySpeciesCreate(O, 0).
+
+    9.4.2.3 ArraySpeciesCreate
+
+    [...]
+    5. Let C be ? Get(originalArray, "constructor").
+    [...]
+    9. If IsConstructor(C) is false, throw a TypeError exception.
+---*/
+
+var a = [];
+
+a.constructor = null;
+assert.throws(TypeError, function() {
+  a.concat();
+}, 'a.concat() throws a TypeError exception');
+
+a = [];
+a.constructor = 1;
+assert.throws(TypeError, function() {
+  a.concat();
+}, 'a.concat() throws a TypeError exception');
+
+a = [];
+a.constructor = 'string';
+assert.throws(TypeError, function() {
+  a.concat();
+}, 'a.concat() throws a TypeError exception');
+
+a = [];
+a.constructor = true;
+assert.throws(TypeError, function() {
+  a.concat();
+}, 'a.concat() throws a TypeError exception');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/concat/create-ctor-poisoned.js b/js/src/tests/test262/built-ins/Array/prototype/concat/create-ctor-poisoned.js
new file mode 100644
index 0000000000..faaaf7c756
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/concat/create-ctor-poisoned.js
@@ -0,0 +1,28 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.concat
+description: Abrupt completion from `constructor` property access
+info: |
+    1. Let O be ? ToObject(this value).
+    2. Let A be ? ArraySpeciesCreate(O, 0).
+
+    9.4.2.3 ArraySpeciesCreate
+
+    [...]
+    5. Let C be ? Get(originalArray, "constructor").
+---*/
+
+var a = [];
+
+Object.defineProperty(a, 'constructor', {
+  get: function() {
+    throw new Test262Error();
+  }
+});
+
+assert.throws(Test262Error, function() {
+  a.concat();
+}, 'a.concat() throws a Test262Error exception');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/concat/create-non-array.js b/js/src/tests/test262/built-ins/Array/prototype/concat/create-non-array.js
new file mode 100644
index 0000000000..6501c3270a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/concat/create-non-array.js
@@ -0,0 +1,40 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.concat
+description: Constructor is ignored for non-Array values
+info: |
+    1. Let O be ? ToObject(this value).
+    2. Let A be ? ArraySpeciesCreate(O, 0).
+
+    9.4.2.3 ArraySpeciesCreate
+
+    [...]
+    3. Let isArray be ? IsArray(originalArray).
+    4. If isArray is false, return ? ArrayCreate(length).
+---*/
+
+var obj = {
+  length: 0
+};
+var callCount = 0;
+var result;
+Object.defineProperty(obj, 'constructor', {
+  get: function() {
+    callCount += 1;
+  }
+});
+
+result = Array.prototype.concat.call(obj);
+
+assert.sameValue(callCount, 0, 'The value of callCount is expected to be 0');
+assert.sameValue(
+  Object.getPrototypeOf(result),
+  Array.prototype,
+  'Object.getPrototypeOf(Array.prototype.concat.call(obj)) returns Array.prototype'
+);
+assert(Array.isArray(result), 'Array.isArray(result) must return true');
+assert.sameValue(result.length, 1, 'The value of result.length is expected to be 1');
+assert.sameValue(result[0], obj, 'The value of result[0] is expected to equal the value of obj');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/concat/create-proto-from-ctor-realm-array.js b/js/src/tests/test262/built-ins/Array/prototype/concat/create-proto-from-ctor-realm-array.js
new file mode 100644
index 0000000000..c23e02c0ce
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/concat/create-proto-from-ctor-realm-array.js
@@ -0,0 +1,48 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.concat
+description: Prefer Array constructor of current realm record
+info: |
+    1. Let O be ? ToObject(this value).
+    2. Let A be ? ArraySpeciesCreate(O, 0).
+    [...]
+
+    9.4.2.3 ArraySpeciesCreate
+
+    [...]
+    5. Let C be ? Get(originalArray, "constructor").
+    6. If IsConstructor(C) is true, then
+       a. Let thisRealm be the current Realm Record.
+       b. Let realmC be ? GetFunctionRealm(C).
+       c. If thisRealm and realmC are not the same Realm Record, then
+          i. If SameValue(C, realmC.[[Intrinsics]].[[%Array%]]) is true, let C
+             be undefined.
+    [...]
+features: [cross-realm, Symbol.species]
+---*/
+
+var array = [];
+var callCount = 0;
+var OArray = $262.createRealm().global.Array;
+var speciesDesc = {
+  get: function() {
+    callCount += 1;
+  }
+};
+var result;
+array.constructor = OArray;
+
+Object.defineProperty(Array, Symbol.species, speciesDesc);
+Object.defineProperty(OArray, Symbol.species, speciesDesc);
+
+result = array.concat();
+
+assert.sameValue(
+  Object.getPrototypeOf(result),
+  Array.prototype,
+  'Object.getPrototypeOf(array.concat()) returns Array.prototype'
+);
+assert.sameValue(callCount, 0, 'The value of callCount is expected to be 0');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/concat/create-proto-from-ctor-realm-non-array.js b/js/src/tests/test262/built-ins/Array/prototype/concat/create-proto-from-ctor-realm-non-array.js
new file mode 100644
index 0000000000..eaf05ad755
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/concat/create-proto-from-ctor-realm-non-array.js
@@ -0,0 +1,49 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.concat
+description: Accept non-Array constructors from other realms
+info: |
+    1. Let O be ? ToObject(this value).
+    2. Let A be ? ArraySpeciesCreate(O, 0).
+    [...]
+
+    9.4.2.3 ArraySpeciesCreate
+
+    [...]
+    5. Let C be ? Get(originalArray, "constructor").
+    6. If IsConstructor(C) is true, then
+       a. Let thisRealm be the current Realm Record.
+       b. Let realmC be ? GetFunctionRealm(C).
+       c. If thisRealm and realmC are not the same Realm Record, then
+          i. If SameValue(C, realmC.[[Intrinsics]].[[%Array%]]) is true, let C
+             be undefined.
+    [...]
+features: [cross-realm, Symbol.species]
+---*/
+
+var array = [];
+var callCount = 0;
+var CustomCtor = function() {};
+var OObject = $262.createRealm().global.Object;
+var speciesDesc = {
+  get: function() {
+    callCount += 1;
+  }
+};
+var result;
+array.constructor = OObject;
+OObject[Symbol.species] = CustomCtor;
+
+Object.defineProperty(Array, Symbol.species, speciesDesc);
+
+result = array.concat();
+
+assert.sameValue(
+  Object.getPrototypeOf(result),
+  CustomCtor.prototype,
+  'Object.getPrototypeOf(array.concat()) returns CustomCtor.prototype'
+);
+assert.sameValue(callCount, 0, 'The value of callCount is expected to be 0');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/concat/create-proxy.js b/js/src/tests/test262/built-ins/Array/prototype/concat/create-proxy.js
new file mode 100644
index 0000000000..4ce82f5c7f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/concat/create-proxy.js
@@ -0,0 +1,45 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.concat
+description: Species constructor of a Proxy object whose target is an array
+info: |
+    [...]
+    2. Let A be ? ArraySpeciesCreate(O, 0).
+    [...]
+    7. Return A.
+
+    9.4.2.3 ArraySpeciesCreate
+
+    [...]
+    3. Let isArray be ? IsArray(originalArray).
+
+    7.2.2 IsArray
+
+    [...]
+    3. If argument is a Proxy exotic object, then
+       a. If the value of the [[ProxyHandler]] internal slot of argument is
+          null, throw a TypeError exception.
+       b. Let target be the value of the [[ProxyTarget]] internal slot of
+          argument.
+       c. Return ? IsArray(target).
+features: [Proxy, Symbol.species]
+---*/
+
+var array = [];
+var proxy = new Proxy(new Proxy(array, {}), {});
+var Ctor = function() {};
+var result;
+
+array.constructor = function() {};
+array.constructor[Symbol.species] = Ctor;
+
+result = Array.prototype.concat.call(proxy);
+
+assert.sameValue(
+  Object.getPrototypeOf(result),
+  Ctor.prototype,
+  'Object.getPrototypeOf(Array.prototype.concat.call(proxy)) returns Ctor.prototype'
+);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/concat/create-revoked-proxy.js b/js/src/tests/test262/built-ins/Array/prototype/concat/create-revoked-proxy.js
new file mode 100644
index 0000000000..bac42fd509
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/concat/create-revoked-proxy.js
@@ -0,0 +1,40 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.concat
+description: Abrupt completion from constructor that is a revoked Proxy object
+info: |
+    1. Let O be ? ToObject(this value).
+    2. Let A be ? ArraySpeciesCreate(O, 0).
+
+    9.4.2.3 ArraySpeciesCreate
+
+    [...]
+    3. Let isArray be ? IsArray(originalArray).
+
+    7.2.2 IsArray
+
+    [...]
+    3. If argument is a Proxy exotic object, then
+       a. If the value of the [[ProxyHandler]] internal slot of argument is
+          null, throw a TypeError exception.
+features: [Proxy]
+---*/
+
+var o = Proxy.revocable([], {});
+var callCount = 0;
+
+Object.defineProperty(o.proxy, 'constructor', {
+  get: function() {
+    callCount += 1;
+  }
+});
+o.revoke();
+
+assert.throws(TypeError, function() {
+  Array.prototype.concat.call(o.proxy);
+}, 'Array.prototype.concat.call(o.proxy) throws a TypeError exception');
+
+assert.sameValue(callCount, 0, 'The value of callCount is expected to be 0');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/concat/create-species-abrupt.js b/js/src/tests/test262/built-ins/Array/prototype/concat/create-species-abrupt.js
new file mode 100644
index 0000000000..340a42f8cf
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/concat/create-species-abrupt.js
@@ -0,0 +1,34 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.concat
+description: Species constructor returns an abrupt completion
+info: |
+    1. Let O be ? ToObject(this value).
+    2. Let A be ? ArraySpeciesCreate(O, 0).
+
+    9.4.2.3 ArraySpeciesCreate
+
+    [...]
+    5. Let C be ? Get(originalArray, "constructor").
+    [...]
+    7. If Type(C) is Object, then
+       a. Let C be ? Get(C, @@species).
+       b. If C is null, let C be undefined.
+    [...]
+    10. Return ? Construct(C, « length »).
+features: [Symbol.species]
+---*/
+
+var Ctor = function() {
+  throw new Test262Error();
+};
+var a = [];
+a.constructor = {};
+a.constructor[Symbol.species] = Ctor;
+
+assert.throws(Test262Error, function() {
+  a.concat();
+}, 'a.concat() throws a Test262Error exception');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/concat/create-species-non-ctor.js b/js/src/tests/test262/built-ins/Array/prototype/concat/create-species-non-ctor.js
new file mode 100644
index 0000000000..fb102a6052
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/concat/create-species-non-ctor.js
@@ -0,0 +1,40 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.concat
+description: >
+    Behavior when the @@species attribute is a non-constructor object
+info: |
+    1. Let O be ? ToObject(this value).
+    2. Let A be ? ArraySpeciesCreate(O, 0).
+
+    9.4.2.3 ArraySpeciesCreate
+
+    [...]
+    5. Let C be ? Get(originalArray, "constructor").
+    [...]
+    7. If Type(C) is Object, then
+       a. Let C be ? Get(C, @@species).
+       b. If C is null, let C be undefined.
+    [...]
+    9. If IsConstructor(C) is false, throw a TypeError exception.
+includes: [isConstructor.js]
+features: [Symbol.species, Reflect.construct]
+---*/
+
+assert.sameValue(
+  isConstructor(parseInt),
+  false,
+  'precondition: isConstructor(parseInt) must return false'
+);
+
+var a = [];
+
+a.constructor = {};
+a.constructor[Symbol.species] = parseInt;
+
+assert.throws(TypeError, function() {
+  a.concat();
+}, 'a.concat() throws a TypeError exception');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/concat/create-species-non-extensible-spreadable.js b/js/src/tests/test262/built-ins/Array/prototype/concat/create-species-non-extensible-spreadable.js
new file mode 100644
index 0000000000..f2d43b7293
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/concat/create-species-non-extensible-spreadable.js
@@ -0,0 +1,45 @@
+// Copyright (C) 2020 Alexey Shvayka. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.concat
+description: >
+  TypeError is thrown if CreateDataProperty fails.
+  (result object is non-extensible, argument is spreadable)
+info: |
+  Array.prototype.concat ( ...arguments )
+
+  [...]
+  5. Repeat, while items is not empty
+    [...]
+    c. If spreadable is true, then
+      [...]
+      iv. Repeat, while k < len
+        [...]
+        3. If exists is true, then
+          [...]
+          b. Perform ? CreateDataPropertyOrThrow(A, ! ToString(n), subElement).
+    [...]
+
+  CreateDataPropertyOrThrow ( O, P, V )
+
+  [...]
+  3. Let success be ? CreateDataProperty(O, P, V).
+  4. If success is false, throw a TypeError exception.
+features: [Symbol.species]
+---*/
+
+var A = function(_length) {
+  this.length = 0;
+  Object.preventExtensions(this);
+};
+
+var arr = [];
+arr.constructor = {};
+arr.constructor[Symbol.species] = A;
+
+assert.throws(TypeError, function() {
+  arr.concat([1]);
+}, 'arr.concat([1]) throws a TypeError exception');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/concat/create-species-non-extensible.js b/js/src/tests/test262/built-ins/Array/prototype/concat/create-species-non-extensible.js
new file mode 100644
index 0000000000..a3bb4f0a60
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/concat/create-species-non-extensible.js
@@ -0,0 +1,43 @@
+// Copyright (C) 2020 Alexey Shvayka. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.concat
+description: >
+  TypeError is thrown if CreateDataProperty fails.
+  (result object is non-extensible, argument is not spreadable)
+info: |
+  Array.prototype.concat ( ...arguments )
+
+  [...]
+  5. Repeat, while items is not empty
+    [...]
+    c. If spreadable is true, then
+      [...]
+    d. Else,
+      [...]
+      iii. Perform ? CreateDataPropertyOrThrow(A, ! ToString(n), E).
+    [...]
+
+  CreateDataPropertyOrThrow ( O, P, V )
+
+  [...]
+  3. Let success be ? CreateDataProperty(O, P, V).
+  4. If success is false, throw a TypeError exception.
+features: [Symbol.species]
+---*/
+
+var A = function(_length) {
+  this.length = 0;
+  Object.preventExtensions(this);
+};
+
+var arr = [];
+arr.constructor = {};
+arr.constructor[Symbol.species] = A;
+
+assert.throws(TypeError, function() {
+  arr.concat(1);
+}, 'arr.concat(1) throws a TypeError exception');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/concat/create-species-null.js b/js/src/tests/test262/built-ins/Array/prototype/concat/create-species-null.js
new file mode 100644
index 0000000000..0d0e7c7350
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/concat/create-species-null.js
@@ -0,0 +1,38 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.concat
+description: >
+    A null value for the @@species constructor is interpreted as `undefined`
+info: |
+    1. Let O be ? ToObject(this value).
+    2. Let A be ? ArraySpeciesCreate(O, 0).
+
+    9.4.2.3 ArraySpeciesCreate
+
+    [...]
+    5. Let C be ? Get(originalArray, "constructor").
+    [...]
+    7. If Type(C) is Object, then
+       a. Let C be ? Get(C, @@species).
+       b. If C is null, let C be undefined.
+    8. If C is undefined, return ? ArrayCreate(length).
+features: [Symbol.species]
+---*/
+
+var a = [];
+var result;
+
+a.constructor = {};
+a.constructor[Symbol.species] = null;
+
+result = a.concat();
+
+assert.sameValue(
+  Object.getPrototypeOf(result),
+  Array.prototype,
+  'Object.getPrototypeOf(a.concat()) returns Array.prototype'
+);
+assert(Array.isArray(result), 'Array.isArray(result) must return true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/concat/create-species-poisoned.js b/js/src/tests/test262/built-ins/Array/prototype/concat/create-species-poisoned.js
new file mode 100644
index 0000000000..a4f8cfe80a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/concat/create-species-poisoned.js
@@ -0,0 +1,33 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.concat
+description: Abrupt completion from `@@species` property access
+info: |
+    1. Let O be ? ToObject(this value).
+    2. Let A be ? ArraySpeciesCreate(O, 0).
+
+    9.4.2.3 ArraySpeciesCreate
+
+    [...]
+    5. Let C be ? Get(originalArray, "constructor").
+    [...]
+    7. If Type(C) is Object, then
+       a. Let C be ? Get(C, @@species).
+features: [Symbol.species]
+---*/
+
+var a = [];
+a.constructor = {};
+
+Object.defineProperty(a.constructor, Symbol.species, {
+  get: function() {
+    throw new Test262Error();
+  }
+});
+
+assert.throws(Test262Error, function() {
+  a.concat();
+}, 'a.concat() throws a Test262Error exception');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/concat/create-species-undef.js b/js/src/tests/test262/built-ins/Array/prototype/concat/create-species-undef.js
new file mode 100644
index 0000000000..0c64e02017
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/concat/create-species-undef.js
@@ -0,0 +1,40 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.concat
+description: >
+    An undefined value for the @@species constructor triggers the creation  of
+    an Array exotic object
+info: |
+    [...]
+    9. Let A be ? ArraySpeciesCreate(O, actualDeleteCount).
+    [...]
+
+    9.4.2.3 ArraySpeciesCreate
+
+    [...]
+    5. Let C be ? Get(originalArray, "constructor").
+    [...]
+    7. If Type(C) is Object, then
+       a. Let C be ? Get(C, @@species).
+       b. If C is null, let C be undefined.
+    8. If C is undefined, return ? ArrayCreate(length).
+features: [Symbol.species]
+---*/
+
+var a = [];
+var result;
+
+a.constructor = {};
+a.constructor[Symbol.species] = undefined;
+
+result = a.concat();
+
+assert.sameValue(
+  Object.getPrototypeOf(result),
+  Array.prototype,
+  'Object.getPrototypeOf(a.concat()) returns Array.prototype'
+);
+assert(Array.isArray(result), 'Array.isArray(result) must return true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/concat/create-species-with-non-configurable-property-spreadable.js b/js/src/tests/test262/built-ins/Array/prototype/concat/create-species-with-non-configurable-property-spreadable.js
new file mode 100644
index 0000000000..49bbd170f4
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/concat/create-species-with-non-configurable-property-spreadable.js
@@ -0,0 +1,47 @@
+// Copyright (C) 2020 Alexey Shvayka. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.concat
+description: >
+  TypeError is thrown if CreateDataProperty fails.
+  (result object's "0" is non-configurable, argument is spreadable)
+info: |
+  Array.prototype.concat ( ...arguments )
+
+  [...]
+  5. Repeat, while items is not empty
+    [...]
+    c. If spreadable is true, then
+      [...]
+      iv. Repeat, while k < len
+        [...]
+        3. If exists is true, then
+          [...]
+          b. Perform ? CreateDataPropertyOrThrow(A, ! ToString(n), subElement).
+    [...]
+
+  CreateDataPropertyOrThrow ( O, P, V )
+
+  [...]
+  3. Let success be ? CreateDataProperty(O, P, V).
+  4. If success is false, throw a TypeError exception.
+features: [Symbol.species]
+---*/
+
+var A = function(_length) {
+  Object.defineProperty(this, "0", {
+    writable: true,
+    configurable: false,
+  });
+};
+
+var arr = [];
+arr.constructor = {};
+arr.constructor[Symbol.species] = A;
+
+assert.throws(TypeError, function() {
+  arr.concat([1]);
+}, 'arr.concat([1]) throws a TypeError exception');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/concat/create-species-with-non-configurable-property.js b/js/src/tests/test262/built-ins/Array/prototype/concat/create-species-with-non-configurable-property.js
new file mode 100644
index 0000000000..cbb724f417
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/concat/create-species-with-non-configurable-property.js
@@ -0,0 +1,45 @@
+// Copyright (C) 2020 Alexey Shvayka. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.concat
+description: >
+  TypeError is thrown if CreateDataProperty fails.
+  (result object's "0" is non-configurable, argument is non-spreadable)
+info: |
+  Array.prototype.concat ( ...arguments )
+
+  [...]
+  5. Repeat, while items is not empty
+    [...]
+    c. If spreadable is true, then
+      [...]
+    d. Else,
+      [...]
+      iii. Perform ? CreateDataPropertyOrThrow(A, ! ToString(n), E).
+    [...]
+
+  CreateDataPropertyOrThrow ( O, P, V )
+
+  [...]
+  3. Let success be ? CreateDataProperty(O, P, V).
+  4. If success is false, throw a TypeError exception.
+features: [Symbol.species]
+---*/
+
+var A = function(_length) {
+  Object.defineProperty(this, "0", {
+    set: function(_value) {},
+    configurable: false,
+  });
+};
+
+var arr = [];
+arr.constructor = {};
+arr.constructor[Symbol.species] = A;
+
+assert.throws(TypeError, function() {
+  arr.concat(1);
+}, 'arr.concat(1) throws a TypeError exception');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/concat/create-species-with-non-writable-property-spreadable.js b/js/src/tests/test262/built-ins/Array/prototype/concat/create-species-with-non-writable-property-spreadable.js
new file mode 100644
index 0000000000..98e0efc10d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/concat/create-species-with-non-writable-property-spreadable.js
@@ -0,0 +1,49 @@
+// Copyright (C) 2020 Alexey Shvayka. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.concat
+description: >
+  Non-writable properties are overwritten by CreateDataProperty.
+  (result object's "0" is non-writable, argument is spreadable)
+info: |
+  Array.prototype.concat ( ...arguments )
+
+  [...]
+  5. Repeat, while items is not empty
+    [...]
+    c. If spreadable is true, then
+      [...]
+      iv. Repeat, while k < len
+        [...]
+        3. If exists is true, then
+          [...]
+          b. Perform ? CreateDataPropertyOrThrow(A, ! ToString(n), subElement).
+    [...]
+features: [Symbol.species]
+includes: [propertyHelper.js]
+---*/
+
+var A = function(_length) {
+  Object.defineProperty(this, "0", {
+    value: 1,
+    writable: false,
+    enumerable: false,
+    configurable: true,
+  });
+};
+
+var arr = [];
+arr.constructor = {};
+arr.constructor[Symbol.species] = A;
+
+var res = arr.concat([2]);
+
+verifyProperty(res, "0", {
+  value: 2,
+  writable: true,
+  enumerable: true,
+  configurable: true,
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/concat/create-species-with-non-writable-property.js b/js/src/tests/test262/built-ins/Array/prototype/concat/create-species-with-non-writable-property.js
new file mode 100644
index 0000000000..b9268c91b3
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/concat/create-species-with-non-writable-property.js
@@ -0,0 +1,49 @@
+// Copyright (C) 2020 Alexey Shvayka. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.concat
+description: >
+  Non-writable properties are overwritten by CreateDataProperty.
+  (result object's "0" is non-writable, argument is not spreadable)
+info: |
+  Array.prototype.concat ( ...arguments )
+
+  [...]
+  5. Repeat, while items is not empty
+    [...]
+    c. If spreadable is true, then
+      [...]
+      iv. Repeat, while k < len
+        [...]
+        3. If exists is true, then
+          [...]
+          b. Perform ? CreateDataPropertyOrThrow(A, ! ToString(n), subElement).
+    [...]
+features: [Symbol.species]
+includes: [propertyHelper.js]
+---*/
+
+var A = function(_length) {
+  Object.defineProperty(this, "0", {
+    value: 1,
+    writable: false,
+    enumerable: false,
+    configurable: true,
+  });
+};
+
+var arr = [];
+arr.constructor = {};
+arr.constructor[Symbol.species] = A;
+
+var res = arr.concat(2);
+
+verifyProperty(res, "0", {
+  value: 2,
+  writable: true,
+  enumerable: true,
+  configurable: true,
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/concat/create-species.js b/js/src/tests/test262/built-ins/Array/prototype/concat/create-species.js
new file mode 100644
index 0000000000..60cc7138a5
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/concat/create-species.js
@@ -0,0 +1,48 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.concat
+description: Species constructor is used to create a new instance
+info: |
+    1. Let O be ? ToObject(this value).
+    2. Let A be ? ArraySpeciesCreate(O, 0).
+
+    9.4.2.3 ArraySpeciesCreate
+
+    [...]
+    5. Let C be ? Get(originalArray, "constructor").
+    [...]
+    7. If Type(C) is Object, then
+       a. Let C be ? Get(C, @@species).
+       b. If C is null, let C be undefined.
+    [...]
+    10. Return ? Construct(C, « length »).
+features: [Symbol.species]
+---*/
+
+var thisValue, args, result;
+var callCount = 0;
+var instance = [];
+var Ctor = function() {
+  callCount += 1;
+  thisValue = this;
+  args = arguments;
+  return instance;
+};
+var a = [];
+a.constructor = {};
+a.constructor[Symbol.species] = Ctor;
+
+result = a.concat();
+
+assert.sameValue(callCount, 1, 'The value of callCount is expected to be 1');
+assert.sameValue(
+  Object.getPrototypeOf(thisValue),
+  Ctor.prototype,
+  'Object.getPrototypeOf(this) returns Ctor.prototype'
+);
+assert.sameValue(args.length, 1, 'The value of args.length is expected to be 1');
+assert.sameValue(args[0], 0, 'The value of args[0] is expected to be 0');
+assert.sameValue(result, instance, 'The value of result is expected to equal the value of instance');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/concat/is-concat-spreadable-get-err.js b/js/src/tests/test262/built-ins/Array/prototype/concat/is-concat-spreadable-get-err.js
new file mode 100644
index 0000000000..e45bbd57ac
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/concat/is-concat-spreadable-get-err.js
@@ -0,0 +1,40 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.concat
+description: Error thrown when accessing `Symbol.isConcatSpreadable` property
+info: |
+    1. Let O be ToObject(this value).
+    2. ReturnIfAbrupt(O).
+    3. Let A be ArraySpeciesCreate(O, 0).
+    4. ReturnIfAbrupt(A).
+    5. Let n be 0.
+    6. Let items be a List whose first element is O and whose subsequent
+       elements are, in left to right order, the arguments that were passed to
+       this function invocation.
+    7. Repeat, while items is not empty
+      a. Remove the first element from items and let E be the value of the element.
+      b. Let spreadable be IsConcatSpreadable(E).
+      c. ReturnIfAbrupt(spreadable).
+
+    ES6 22.1.3.1.1: Runtime Semantics: IsConcatSpreadable ( O )
+
+    1. If Type(O) is not Object, return false.
+    2. Let spreadable be Get(O, @@isConcatSpreadable).
+    3. ReturnIfAbrupt(spreadable).
+features: [Symbol.isConcatSpreadable]
+---*/
+
+var o = {};
+
+Object.defineProperty(o, Symbol.isConcatSpreadable, {
+  get: function() {
+    throw new Test262Error();
+  }
+});
+
+assert.throws(Test262Error, function() {
+  Array.prototype.concat.call(o);
+}, 'Array.prototype.concat.call(o) throws a Test262Error exception');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/concat/is-concat-spreadable-get-order.js b/js/src/tests/test262/built-ins/Array/prototype/concat/is-concat-spreadable-get-order.js
new file mode 100644
index 0000000000..847dee557b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/concat/is-concat-spreadable-get-order.js
@@ -0,0 +1,75 @@
+// Copyright (C) 2020 Alexey Shvayka. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.concat
+description: >
+  Symbol.isConcatSpreadable should be looked up once for `this value` and
+  once for each argument, after ArraySpeciesCreate routine.
+info: |
+  Array.prototype.concat ( ...arguments )
+
+  1. Let O be ? ToObject(this value).
+  2. Let A be ? ArraySpeciesCreate(O, 0).
+  [...]
+  5. Repeat, while items is not empty
+    a. Remove the first element from items and let E be the value of the element.
+    b. Let spreadable be ? IsConcatSpreadable(E).
+    [...]
+
+  ArraySpeciesCreate ( originalArray, length )
+
+  [...]
+  5. Let C be ? Get(originalArray, "constructor").
+  [...]
+
+  Runtime Semantics: IsConcatSpreadable ( O )
+
+  1. If Type(O) is not Object, return false.
+  2. Let spreadable be ? Get(O, @@isConcatSpreadable).
+  [...]
+includes: [compareArray.js]
+features: [Symbol.isConcatSpreadable]
+---*/
+
+var calls = [];
+var descConstructor = {
+  get: function() {
+    calls.push("constructor");
+    return Array;
+  },
+  configurable: true,
+};
+var descSpreadable = {
+  get: function() {
+    calls.push("isConcatSpreadable");
+  },
+  configurable: true,
+};
+
+var arr1 = [];
+Object.defineProperty(arr1, "constructor", descConstructor);
+Object.defineProperty(arr1, Symbol.isConcatSpreadable, descSpreadable);
+
+assert.compareArray(arr1.concat(1), [1], 'arr1.concat(1) must return [1]');
+assert.compareArray(
+  calls,
+  ["constructor", "isConcatSpreadable"],
+  'The value of calls is expected to be ["constructor", "isConcatSpreadable"]'
+);
+
+calls = [];
+
+var arr2 = [];
+var arg = {};
+Object.defineProperty(arr2, "constructor", descConstructor);
+Object.defineProperty(arg, Symbol.isConcatSpreadable, descSpreadable);
+
+assert.compareArray(arr2.concat(arg), [arg], 'arr2.concat({}) must return [arg]');
+assert.compareArray(
+  calls,
+  ["constructor", "isConcatSpreadable"],
+  'The value of calls is expected to be ["constructor", "isConcatSpreadable"]'
+);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/concat/is-concat-spreadable-is-array-proxy-revoked.js b/js/src/tests/test262/built-ins/Array/prototype/concat/is-concat-spreadable-is-array-proxy-revoked.js
new file mode 100644
index 0000000000..e242f57045
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/concat/is-concat-spreadable-is-array-proxy-revoked.js
@@ -0,0 +1,52 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-isconcatspreadable
+description: Revoked proxy value produces a TypeError when supplied to IsArray
+info: |
+  [...]
+  5. Repeat, while items is not empty
+     a. Remove the first element from items and let E be the value of the
+        element.
+     b. Let spreadable be ? IsConcatSpreadable(E).
+     c. If spreadable is true, then
+        [...]
+     e. Else E is added as a single item rather than spread,
+        [...]
+
+  ES6 22.1.3.1.1: Runtime Semantics: IsConcatSpreadable ( O )
+
+  1. If Type(O) is not Object, return false.
+  2. Let spreadable be ? Get(O, @@isConcatSpreadable).
+  3. If spreadable is not undefined, return ToBoolean(spreadable).
+  4. Return ? IsArray(O).
+
+  7.2.2 IsArray
+
+  [...]
+  3. If argument is a Proxy exotic object, then
+     a. If the value of the [[ProxyHandler]] internal slot of argument is null,
+        throw a TypeError exception.
+     b. Let target be the value of the [[ProxyTarget]] internal slot of
+        argument.
+     c. Return ? IsArray(target).
+features: [Proxy, Symbol.isConcatSpreadable]
+---*/
+
+var target = [];
+var handle = Proxy.revocable(target, {
+  get: function(_, key) {
+    // Defer proxy revocation until after property access to ensure that the
+    // expected TypeError originates from the IsArray operation.
+    if (key === Symbol.isConcatSpreadable) {
+      handle.revoke();
+    }
+    return target[key];
+  }
+});
+
+assert.throws(TypeError, function() {
+  [].concat(handle.proxy);
+}, '[].concat(handle.proxy) throws a TypeError exception');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/concat/is-concat-spreadable-proxy-revoked.js b/js/src/tests/test262/built-ins/Array/prototype/concat/is-concat-spreadable-proxy-revoked.js
new file mode 100644
index 0000000000..41f4bfb6c3
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/concat/is-concat-spreadable-proxy-revoked.js
@@ -0,0 +1,45 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-isconcatspreadable
+description: >
+  Revoked proxy value produces a TypeError during access of
+  `Symbol.isConcatSpreadable` property
+info: |
+  [...]
+  5. Repeat, while items is not empty
+     a. Remove the first element from items and let E be the value of the
+        element.
+     b. Let spreadable be ? IsConcatSpreadable(E).
+     c. If spreadable is true, then
+        [...]
+     e. Else E is added as a single item rather than spread,
+        [...]
+
+  ES6 22.1.3.1.1: Runtime Semantics: IsConcatSpreadable ( O )
+
+  1. If Type(O) is not Object, return false.
+  2. Let spreadable be ? Get(O, @@isConcatSpreadable).
+
+  7.3.1 Get
+
+  [...]
+  3. Return ? O.[[Get]](P, O).
+
+  9.5.8 [[Get]]
+
+  [...]
+  2. Let handler be O.[[ProxyHandler]].
+  3. If handler is null, throw a TypeError exception.
+features: [Proxy]
+---*/
+
+var handle = Proxy.revocable([], {});
+
+handle.revoke();
+
+assert.throws(TypeError, function() {
+  [].concat(handle.proxy);
+}, '[].concat(handle.proxy) throws a TypeError exception');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/concat/is-concat-spreadable-proxy.js b/js/src/tests/test262/built-ins/Array/prototype/concat/is-concat-spreadable-proxy.js
new file mode 100644
index 0000000000..52dde72e68
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/concat/is-concat-spreadable-proxy.js
@@ -0,0 +1,53 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-isconcatspreadable
+description: >
+  Proxies who final targets are arrays are considered spreadable
+info: |
+  [...]
+  5. Repeat, while items is not empty
+     a. Remove the first element from items and let E be the value of the
+        element.
+     b. Let spreadable be ? IsConcatSpreadable(E).
+     c. If spreadable is true, then
+        [...]
+     e. Else E is added as a single item rather than spread,
+        [...]
+
+  ES6 22.1.3.1.1: Runtime Semantics: IsConcatSpreadable ( O )
+
+  1. If Type(O) is not Object, return false.
+  2. Let spreadable be ? Get(O, @@isConcatSpreadable).
+  3. If spreadable is not undefined, return ToBoolean(spreadable).
+  4. Return ? IsArray(O).
+
+  7.2.2 IsArray
+
+  [...]
+  3. If argument is a Proxy exotic object, then
+     a. If the value of the [[ProxyHandler]] internal slot of argument is null,
+        throw a TypeError exception.
+     b. Let target be the value of the [[ProxyTarget]] internal slot of
+        argument.
+     c. Return ? IsArray(target).
+features: [Proxy, Symbol.isConcatSpreadable]
+---*/
+
+var arrayProxy = new Proxy([], {});
+var arrayProxyProxy = new Proxy(arrayProxy, {});
+var spreadable = {};
+spreadable[Symbol.isConcatSpreadable] = true;
+var spreadableProxy = new Proxy(spreadable, {});
+
+assert.sameValue([].concat(arrayProxy).length, 0, 'The value of [].concat(arrayProxy).length is expected to be 0');
+assert.sameValue(
+  [].concat(arrayProxyProxy).length, 0, 'The value of [].concat(arrayProxyProxy).length is expected to be 0'
+);
+assert.sameValue(
+  [].concat(spreadableProxy).length,
+  0,
+  'The value of [].concat(spreadableProxy).length is expected to be 0'
+);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/concat/is-concat-spreadable-val-falsey.js b/js/src/tests/test262/built-ins/Array/prototype/concat/is-concat-spreadable-val-falsey.js
new file mode 100644
index 0000000000..c565bac64a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/concat/is-concat-spreadable-val-falsey.js
@@ -0,0 +1,57 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.concat
+description: >
+    The `Symbol.isConcatSpreadable` property is defined and coerces to `false`
+info: |
+    1. Let O be ToObject(this value).
+    2. ReturnIfAbrupt(O).
+    3. Let A be ArraySpeciesCreate(O, 0).
+    4. ReturnIfAbrupt(A).
+    5. Let n be 0.
+    6. Let items be a List whose first element is O and whose subsequent
+       elements are, in left to right order, the arguments that were passed to
+       this function invocation.
+    7. Repeat, while items is not empty
+      a. Remove the first element from items and let E be the value of the element.
+      b. Let spreadable be IsConcatSpreadable(E).
+      c. ReturnIfAbrupt(spreadable).
+      d. If spreadable is true, then
+         [...]
+      e. Else E is added as a single item rather than spread,
+         [...]
+
+    ES6 22.1.3.1.1: Runtime Semantics: IsConcatSpreadable ( O )
+
+    1. If Type(O) is not Object, return false.
+    2. Let spreadable be Get(O, @@isConcatSpreadable).
+    3. ReturnIfAbrupt(spreadable).
+    4. If spreadable is not undefined, return ToBoolean(spreadable).
+features: [Symbol.isConcatSpreadable]
+---*/
+
+var item = [1, 2];
+var result;
+
+item[Symbol.isConcatSpreadable] = null;
+result = [].concat(item);
+assert.sameValue(result.length, 1, 'The value of result.length is expected to be 1');
+assert.sameValue(result[0], item, 'The value of result[0] is expected to equal the value of item');
+
+item[Symbol.isConcatSpreadable] = false;
+result = [].concat(item);
+assert.sameValue(result.length, 1, 'The value of result.length is expected to be 1');
+assert.sameValue(result[0], item, 'The value of result[0] is expected to equal the value of item');
+
+item[Symbol.isConcatSpreadable] = 0;
+result = [].concat(item);
+assert.sameValue(result.length, 1, 'The value of result.length is expected to be 1');
+assert.sameValue(result[0], item, 'The value of result[0] is expected to equal the value of item');
+
+item[Symbol.isConcatSpreadable] = NaN;
+result = [].concat(item);
+assert.sameValue(result.length, 1, 'The value of result.length is expected to be 1');
+assert.sameValue(result[0], item, 'The value of result[0] is expected to equal the value of item');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/concat/is-concat-spreadable-val-truthy.js b/js/src/tests/test262/built-ins/Array/prototype/concat/is-concat-spreadable-val-truthy.js
new file mode 100644
index 0000000000..9f08bfe6b6
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/concat/is-concat-spreadable-val-truthy.js
@@ -0,0 +1,55 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.concat
+description: >
+    The `Symbol.isConcatSpreadable` property is defined and coerces to `true`
+info: |
+    1. Let O be ToObject(this value).
+    2. ReturnIfAbrupt(O).
+    3. Let A be ArraySpeciesCreate(O, 0).
+    4. ReturnIfAbrupt(A).
+    5. Let n be 0.
+    6. Let items be a List whose first element is O and whose subsequent
+       elements are, in left to right order, the arguments that were passed to
+       this function invocation.
+    7. Repeat, while items is not empty
+      a. Remove the first element from items and let E be the value of the element.
+      b. Let spreadable be IsConcatSpreadable(E).
+      c. ReturnIfAbrupt(spreadable).
+      d. If spreadable is true, then
+         [...]
+
+    ES6 22.1.3.1.1: Runtime Semantics: IsConcatSpreadable ( O )
+
+    1. If Type(O) is not Object, return false.
+    2. Let spreadable be Get(O, @@isConcatSpreadable).
+    3. ReturnIfAbrupt(spreadable).
+    4. If spreadable is not undefined, return ToBoolean(spreadable).
+features: [Symbol, Symbol.isConcatSpreadable]
+---*/
+
+var item = {};
+var result;
+
+item[Symbol.isConcatSpreadable] = true;
+result = [].concat(item);
+assert.sameValue(result.length, 0, 'The value of result.length is expected to be 0');
+
+item[Symbol.isConcatSpreadable] = 86;
+result = [].concat(item);
+assert.sameValue(result.length, 0, 'The value of result.length is expected to be 0');
+
+item[Symbol.isConcatSpreadable] = 'string';
+result = [].concat(item);
+assert.sameValue(result.length, 0, 'The value of result.length is expected to be 0');
+
+item[Symbol.isConcatSpreadable] = Symbol();
+result = [].concat(item);
+assert.sameValue(result.length, 0, 'The value of result.length is expected to be 0');
+
+item[Symbol.isConcatSpreadable] = {};
+result = [].concat(item);
+assert.sameValue(result.length, 0, 'The value of result.length is expected to be 0');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/concat/is-concat-spreadable-val-undefined.js b/js/src/tests/test262/built-ins/Array/prototype/concat/is-concat-spreadable-val-undefined.js
new file mode 100644
index 0000000000..9a66a6a168
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/concat/is-concat-spreadable-val-undefined.js
@@ -0,0 +1,43 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.concat
+description: >
+    The `Symbol.isConcatSpreadable` property is defined as the value `undefined`
+info: |
+    1. Let O be ToObject(this value).
+    2. ReturnIfAbrupt(O).
+    3. Let A be ArraySpeciesCreate(O, 0).
+    4. ReturnIfAbrupt(A).
+    5. Let n be 0.
+    6. Let items be a List whose first element is O and whose subsequent
+       elements are, in left to right order, the arguments that were passed to
+       this function invocation.
+    7. Repeat, while items is not empty
+      a. Remove the first element from items and let E be the value of the element.
+      b. Let spreadable be IsConcatSpreadable(E).
+      c. ReturnIfAbrupt(spreadable).
+      d. If spreadable is true, then
+         [...]
+      e. Else E is added as a single item rather than spread,
+         [...]
+
+    ES6 22.1.3.1.1: Runtime Semantics: IsConcatSpreadable ( O )
+
+    1. If Type(O) is not Object, return false.
+    2. Let spreadable be Get(O, @@isConcatSpreadable).
+    3. ReturnIfAbrupt(spreadable).
+    4. If spreadable is not undefined, return ToBoolean(spreadable).
+    5. Return IsArray(O).
+features: [Symbol.isConcatSpreadable]
+---*/
+
+var item = [];
+var result;
+
+item[Symbol.isConcatSpreadable] = undefined;
+result = [].concat(item);
+
+assert.sameValue(result.length, 0, 'The value of result.length is expected to be 0');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/concat/length.js b/js/src/tests/test262/built-ins/Array/prototype/concat/length.js
new file mode 100644
index 0000000000..5bff590dfd
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/concat/length.js
@@ -0,0 +1,34 @@
+// Copyright (C) 2017 Leo Balter. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.concat
+description: >
+  The "length" property of Array.prototype.concat
+info: |
+  22.1.3.1 Array.prototype.concat ( ...arguments )
+
+  The length property of the concat method is 1.
+
+  17 ECMAScript Standard Built-in Objects
+
+  Every built-in function object, including constructors, has a length property
+  whose value is an integer. Unless otherwise specified, this value is equal to
+  the largest number of named arguments shown in the subclause headings for the
+  function description. Optional parameters (which are indicated with brackets:
+  [ ]) or rest parameters (which are shown using the form «...name») are not
+  included in the default argument count.
+
+  Unless otherwise specified, the length property of a built-in function object
+  has the attributes { [[Writable]]: false, [[Enumerable]]: false,
+    [[Configurable]]: true }.
+includes: [propertyHelper.js]
+---*/
+
+assert.sameValue(Array.prototype.concat.length, 1, 'The value of Array.prototype.concat.length is expected to be 1');
+
+verifyNotEnumerable(Array.prototype.concat, 'length');
+verifyNotWritable(Array.prototype.concat, 'length');
+verifyConfigurable(Array.prototype.concat, 'length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/concat/name.js b/js/src/tests/test262/built-ins/Array/prototype/concat/name.js
new file mode 100644
index 0000000000..f81660ad08
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/concat/name.js
@@ -0,0 +1,32 @@
+// Copyright (C) 2015 André Bargull. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.concat
+description: >
+  Array.prototype.concat.name is "concat".
+info: |
+  Array.prototype.concat ( ...arguments )
+
+  17 ECMAScript Standard Built-in Objects:
+    Every built-in Function object, including constructors, that is not
+    identified as an anonymous function has a name property whose value
+    is a String.
+
+    Unless otherwise specified, the name property of a built-in Function
+    object, if it exists, has the attributes { [[Writable]]: false,
+    [[Enumerable]]: false, [[Configurable]]: true }.
+includes: [propertyHelper.js]
+---*/
+
+assert.sameValue(
+  Array.prototype.concat.name,
+  "concat",
+  'The value of Array.prototype.concat.name is expected to be "concat"'
+);
+
+verifyNotEnumerable(Array.prototype.concat, "name");
+verifyNotWritable(Array.prototype.concat, "name");
+verifyConfigurable(Array.prototype.concat, "name");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/concat/not-a-constructor.js b/js/src/tests/test262/built-ins/Array/prototype/concat/not-a-constructor.js
new file mode 100644
index 0000000000..10bdab75dd
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/concat/not-a-constructor.js
@@ -0,0 +1,35 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Array.prototype.concat does not implement [[Construct]], is not new-able
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+
+  sec-evaluatenew
+
+  ...
+  7. If IsConstructor(constructor) is false, throw a TypeError exception.
+  ...
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Array.prototype.concat),
+  false,
+  'isConstructor(Array.prototype.concat) must return false'
+);
+
+assert.throws(TypeError, () => {
+  new Array.prototype.concat([]);
+}, 'new Array.prototype.concat([]) throws a TypeError exception');
+
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/concat/prop-desc.js b/js/src/tests/test262/built-ins/Array/prototype/concat/prop-desc.js
new file mode 100644
index 0000000000..6dc2ebc718
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/concat/prop-desc.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2017 Leo Balter. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.concat
+description: >
+  "concat" property of Array.prototype
+info: |
+  17 ECMAScript Standard Built-in Objects
+  
+  Every other data property described in clauses 18 through 26 and in Annex B.2
+  has the attributes { [[Writable]]: true, [[Enumerable]]: false,
+    [[Configurable]]: true } unless otherwise specified.
+includes: [propertyHelper.js]
+---*/
+
+assert.sameValue(typeof Array.prototype.concat, 'function', 'The value of `typeof Array.prototype.concat` is expected to be "function"');
+
+verifyNotEnumerable(Array.prototype, "concat");
+verifyWritable(Array.prototype, "concat");
+verifyConfigurable(Array.prototype, "concat");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/concat/shell.js b/js/src/tests/test262/built-ins/Array/prototype/concat/shell.js
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/js/src/tests/test262/built-ins/Array/prototype/constructor.js b/js/src/tests/test262/built-ins/Array/prototype/constructor.js
new file mode 100644
index 0000000000..93e2c2a863
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/constructor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2017 Leo Balter. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.constructor
+description: >
+  Array.prototype.constructor
+info: |
+  22.1.3.2 Array.prototype.constructor
+
+  The initial value of Array.prototype.constructor is the intrinsic object %Array%.
+
+  17 ECMAScript Standard Built-in Objects
+  
+  Every other data property described in clauses 18 through 26 and in Annex B.2
+  has the attributes { [[Writable]]: true, [[Enumerable]]: false,
+    [[Configurable]]: true } unless otherwise specified.
+includes: [propertyHelper.js]
+---*/
+
+assert.sameValue(Array.prototype.constructor, Array);
+
+verifyNotEnumerable(Array.prototype, 'constructor');
+verifyWritable(Array.prototype, 'constructor');
+verifyConfigurable(Array.prototype, 'constructor');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/copyWithin/browser.js b/js/src/tests/test262/built-ins/Array/prototype/copyWithin/browser.js
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/js/src/tests/test262/built-ins/Array/prototype/copyWithin/call-with-boolean.js b/js/src/tests/test262/built-ins/Array/prototype/copyWithin/call-with-boolean.js
new file mode 100644
index 0000000000..27d06cec41
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/copyWithin/call-with-boolean.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2020 Rick Waldron.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.copyWithin
+description: Array.prototype.copyWithin applied to boolean primitive
+---*/
+
+assert.sameValue(
+  Array.prototype.copyWithin.call(true) instanceof Boolean,
+  true,
+  'The result of evaluating (Array.prototype.copyWithin.call(true) instanceof Boolean) is expected to be true'
+);
+assert.sameValue(
+  Array.prototype.copyWithin.call(false) instanceof Boolean,
+  true,
+  'The result of evaluating (Array.prototype.copyWithin.call(false) instanceof Boolean) is expected to be true'
+);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/copyWithin/coerced-values-end.js b/js/src/tests/test262/built-ins/Array/prototype/copyWithin/coerced-values-end.js
new file mode 100644
index 0000000000..7759eea41d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/copyWithin/coerced-values-end.js
@@ -0,0 +1,47 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.copywithin
+description: >
+  end argument is coerced to an integer values.
+info: |
+  22.1.3.3 Array.prototype.copyWithin (target, start [ , end ] )
+
+  ...
+  11. If end is undefined, let relativeEnd be len; else let relativeEnd be
+  ToInteger(end).
+  ...
+includes: [compareArray.js]
+---*/
+
+assert.compareArray(
+  [0, 1, 2, 3].copyWithin(1, 0, null), [0, 1, 2, 3],
+  '[0, 1, 2, 3].copyWithin(1, 0, null) must return [0, 1, 2, 3]'
+);
+
+assert.compareArray(
+  [0, 1, 2, 3].copyWithin(1, 0, NaN), [0, 1, 2, 3],
+  '[0, 1, 2, 3].copyWithin(1, 0, NaN) must return [0, 1, 2, 3]'
+);
+
+assert.compareArray(
+  [0, 1, 2, 3].copyWithin(1, 0, false), [0, 1, 2, 3],
+  '[0, 1, 2, 3].copyWithin(1, 0, false) must return [0, 1, 2, 3]'
+);
+
+assert.compareArray(
+  [0, 1, 2, 3].copyWithin(1, 0, true), [0, 0, 2, 3],
+  '[0, 1, 2, 3].copyWithin(1, 0, true) must return [0, 0, 2, 3]'
+);
+
+assert.compareArray(
+  [0, 1, 2, 3].copyWithin(1, 0, '-2'), [0, 0, 1, 3],
+  '[0, 1, 2, 3].copyWithin(1, 0, "-2") must return [0, 0, 1, 3]'
+);
+
+assert.compareArray(
+  [0, 1, 2, 3].copyWithin(1, 0, -2.5), [0, 0, 1, 3],
+  '[0, 1, 2, 3].copyWithin(1, 0, -2.5) must return [0, 0, 1, 3]'
+);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/copyWithin/coerced-values-start-change-start.js b/js/src/tests/test262/built-ins/Array/prototype/copyWithin/coerced-values-start-change-start.js
new file mode 100644
index 0000000000..0692e72247
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/copyWithin/coerced-values-start-change-start.js
@@ -0,0 +1,57 @@
+// Copyright (C) 2019 Google. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.copywithin
+description: >
+  SECURITY: start argument is coerced to an integer value
+  and side effects change the length of the array so that
+  the start is out of bounds
+info: |
+  22.1.3.3 Array.prototype.copyWithin (target, start [ , end ] )
+
+  ...
+  8. Let relativeStart be ToInteger(start).
+  ...
+includes: [compareArray.js]
+---*/
+
+
+// make a long integer Array
+function longDenseArray(){
+    var a = [0];
+    for(var i = 0; i < 1024; i++){
+        a[i] = i;
+    }
+    return a;
+}
+
+function shorten(){
+    currArray.length = 20;
+    return 1000;
+}
+
+var array = [];
+array.length = 20;
+
+var currArray = longDenseArray();
+
+assert.compareArray(
+  currArray.copyWithin(0, {valueOf: shorten}), array,
+  'currArray.copyWithin(0, {valueOf: shorten}) returns array'
+);
+
+currArray = longDenseArray();
+Object.setPrototypeOf(currArray, longDenseArray());
+
+var array2 = longDenseArray();
+array2.length = 20;
+for(var i = 0; i < 24; i++){
+    array2[i] = Object.getPrototypeOf(currArray)[i+1000];
+}
+
+assert.compareArray(
+  currArray.copyWithin(0, {valueOf: shorten}), array2,
+  'currArray.copyWithin(0, {valueOf: shorten}) returns array2'
+);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/copyWithin/coerced-values-start-change-target.js b/js/src/tests/test262/built-ins/Array/prototype/copyWithin/coerced-values-start-change-target.js
new file mode 100644
index 0000000000..cefe3e64a4
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/copyWithin/coerced-values-start-change-target.js
@@ -0,0 +1,46 @@
+// Copyright (C) 2019 Google. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.copywithin
+description: >
+  SECURITY: start argument is coerced to an integer value
+  and side effects change the length of the array so that
+  the target is out of bounds
+info: |
+  22.1.3.3 Array.prototype.copyWithin (target, start [ , end ] )
+
+  ...
+  8. Let relativeStart be ToInteger(start).
+  ...
+includes: [compareArray.js]
+---*/
+
+
+// make a long integer Array
+function longDenseArray(){
+    var a = [0];
+    for(var i = 0; i < 1024; i++){
+        a[i] = i;
+    }
+    return a;
+}
+
+function shorten(){
+    currArray.length = 20;
+    return 1;
+}
+
+var array = longDenseArray();
+array.length = 20;
+for(var i = 0; i < 19; i++){
+    array[i+1000] = array[i+1];
+}
+
+var currArray = longDenseArray();
+
+assert.compareArray(
+  currArray.copyWithin(1000, {valueOf: shorten}), array,
+  'currArray.copyWithin(1000, {valueOf: shorten}) returns array'
+);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/copyWithin/coerced-values-start.js b/js/src/tests/test262/built-ins/Array/prototype/copyWithin/coerced-values-start.js
new file mode 100644
index 0000000000..804e795b56
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/copyWithin/coerced-values-start.js
@@ -0,0 +1,58 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.copywithin
+description: >
+  start argument is coerced to an integer value.
+info: |
+  22.1.3.3 Array.prototype.copyWithin (target, start [ , end ] )
+
+  ...
+  8. Let relativeStart be ToInteger(start).
+  ...
+includes: [compareArray.js]
+---*/
+
+assert.compareArray(
+  [0, 1, 2, 3].copyWithin(1, undefined), [0, 0, 1, 2],
+  '[0, 1, 2, 3].copyWithin(1, undefined) must return [0, 0, 1, 2]'
+);
+
+assert.compareArray(
+  [0, 1, 2, 3].copyWithin(1, false), [0, 0, 1, 2],
+  '[0, 1, 2, 3].copyWithin(1, false) must return [0, 0, 1, 2]'
+);
+
+assert.compareArray(
+  [0, 1, 2, 3].copyWithin(1, NaN), [0, 0, 1, 2],
+  '[0, 1, 2, 3].copyWithin(1, NaN) must return [0, 0, 1, 2]'
+);
+
+assert.compareArray(
+  [0, 1, 2, 3].copyWithin(1, null), [0, 0, 1, 2],
+  '[0, 1, 2, 3].copyWithin(1, null) must return [0, 0, 1, 2]'
+);
+
+
+assert.compareArray(
+  [0, 1, 2, 3].copyWithin(0, true), [1, 2, 3, 3],
+  '[0, 1, 2, 3].copyWithin(0, true) must return [1, 2, 3, 3]'
+);
+
+
+assert.compareArray(
+  [0, 1, 2, 3].copyWithin(0, '1'), [1, 2, 3, 3],
+  '[0, 1, 2, 3].copyWithin(0, "1") must return [1, 2, 3, 3]'
+);
+
+assert.compareArray(
+  [0, 1, 2, 3].copyWithin(1, 0.5), [0, 0, 1, 2],
+  '[0, 1, 2, 3].copyWithin(1, 0.5) must return [0, 0, 1, 2]'
+);
+
+assert.compareArray(
+  [0, 1, 2, 3].copyWithin(0, 1.5), [1, 2, 3, 3],
+  '[0, 1, 2, 3].copyWithin(0, 1.5) must return [1, 2, 3, 3]'
+);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/copyWithin/coerced-values-target.js b/js/src/tests/test262/built-ins/Array/prototype/copyWithin/coerced-values-target.js
new file mode 100644
index 0000000000..dac3cfd53b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/copyWithin/coerced-values-target.js
@@ -0,0 +1,63 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.copywithin
+description: >
+  target argument is coerced to an integer value.
+info: |
+  22.1.3.3 Array.prototype.copyWithin (target, start [ , end ] )
+
+  ...
+  5. Let relativeTarget be ToInteger(target).
+  ...
+includes: [compareArray.js]
+---*/
+
+assert.compareArray(
+  [0, 1, 2, 3].copyWithin(undefined, 1), [1, 2, 3, 3],
+  '[0, 1, 2, 3].copyWithin(undefined, 1) must return [1, 2, 3, 3]'
+);
+
+assert.compareArray(
+  [0, 1, 2, 3].copyWithin(false, 1), [1, 2, 3, 3],
+  '[0, 1, 2, 3].copyWithin(false, 1) must return [1, 2, 3, 3]'
+);
+
+assert.compareArray(
+  [0, 1, 2, 3].copyWithin(NaN, 1), [1, 2, 3, 3],
+  '[0, 1, 2, 3].copyWithin(NaN, 1) must return [1, 2, 3, 3]'
+);
+
+assert.compareArray(
+  [0, 1, 2, 3].copyWithin(null, 1), [1, 2, 3, 3],
+  '[0, 1, 2, 3].copyWithin(null, 1) must return [1, 2, 3, 3]'
+);
+
+
+assert.compareArray(
+  [0, 1, 2, 3].copyWithin(true, 0), [0, 0, 1, 2],
+  '[0, 1, 2, 3].copyWithin(true, 0) must return [0, 0, 1, 2]'
+);
+
+
+assert.compareArray(
+  [0, 1, 2, 3].copyWithin('1', 0), [0, 0, 1, 2],
+  '[0, 1, 2, 3].copyWithin("1", 0) must return [0, 0, 1, 2]'
+);
+
+assert.compareArray(
+  [0, 1, 2, 3].copyWithin(0.5, 1), [1, 2, 3, 3],
+  '[0, 1, 2, 3].copyWithin(0.5, 1) must return [1, 2, 3, 3]'
+);
+
+assert.compareArray(
+  [0, 1, 2, 3].copyWithin(1.5, 0), [0, 0, 1, 2],
+  '[0, 1, 2, 3].copyWithin(1.5, 0) must return [0, 0, 1, 2]'
+);
+
+assert.compareArray(
+  [0, 1, 2, 3].copyWithin({}, 1), [1, 2, 3, 3],
+  '[0, 1, 2, 3].copyWithin({}, 1) must return [1, 2, 3, 3]'
+);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/copyWithin/fill-holes.js b/js/src/tests/test262/built-ins/Array/prototype/copyWithin/fill-holes.js
new file mode 100644
index 0000000000..972c5d82a7
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/copyWithin/fill-holes.js
@@ -0,0 +1,20 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.copywithin
+description: >
+  Loop from each property, even empty holes.
+---*/
+
+var arr = [0, 1, , , 1];
+
+arr.copyWithin(0, 1, 4);
+
+assert.sameValue(arr.length, 5);
+assert.sameValue(arr[0], 1);
+assert.sameValue(arr[4], 1);
+assert.sameValue(arr.hasOwnProperty(1), false);
+assert.sameValue(arr.hasOwnProperty(2), false);
+assert.sameValue(arr.hasOwnProperty(3), false);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/copyWithin/length-near-integer-limit.js b/js/src/tests/test262/built-ins/Array/prototype/copyWithin/length-near-integer-limit.js
new file mode 100644
index 0000000000..ba7b59991a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/copyWithin/length-near-integer-limit.js
@@ -0,0 +1,45 @@
+// Copyright (C) 2020 Alexey Shvayka. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.copywithin
+description: >
+  Elements are copied and deleted in an array-like object
+  whose "length" property is near the integer limit.
+info: |
+  Array.prototype.copyWithin ( target, start [ , end ] )
+
+  1. Let O be ? ToObject(this value).
+  2. Let len be ? LengthOfArrayLike(O).
+  [...]
+  9. Let count be min(final - from, len - to).
+  [...]
+  12. Repeat, while count > 0
+    [...]
+    d. If fromPresent is true, then
+      i. Let fromVal be ? Get(O, fromKey).
+      ii. Perform ? Set(O, toKey, fromVal, true).
+    e. Else,
+      i. Assert: fromPresent is false.
+      ii. Perform ? DeletePropertyOrThrow(O, toKey).
+    [...]
+---*/
+
+var startIndex = Number.MAX_SAFE_INTEGER - 3;
+var arrayLike = {
+  0: 0,
+  1: 1,
+  2: 2,
+  length: Number.MAX_SAFE_INTEGER,
+};
+
+arrayLike[startIndex] = -3;
+arrayLike[startIndex + 2] = -1;
+
+Array.prototype.copyWithin.call(arrayLike, 0, startIndex, startIndex + 3);
+
+assert.sameValue(arrayLike[0], -3);
+assert.sameValue(1 in arrayLike, false);
+assert.sameValue(arrayLike[2], -1);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/copyWithin/length.js b/js/src/tests/test262/built-ins/Array/prototype/copyWithin/length.js
new file mode 100644
index 0000000000..e846f74754
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/copyWithin/length.js
@@ -0,0 +1,22 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.copywithin
+description: Array.prototype.copyWithin.length value and descriptor.
+info: |
+  22.1.3.3 Array.prototype.copyWithin (target, start [ , end ] )
+
+  The length property of the copyWithin method is 2.
+includes: [propertyHelper.js]
+---*/
+
+assert.sameValue(
+  Array.prototype.copyWithin.length, 2,
+  'The value of `Array.prototype.copyWithin.length` is `2`'
+);
+
+verifyNotEnumerable(Array.prototype.copyWithin, 'length');
+verifyNotWritable(Array.prototype.copyWithin, 'length');
+verifyConfigurable(Array.prototype.copyWithin, 'length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/copyWithin/name.js b/js/src/tests/test262/built-ins/Array/prototype/copyWithin/name.js
new file mode 100644
index 0000000000..c8c6c0b5b9
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/copyWithin/name.js
@@ -0,0 +1,24 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.copywithin
+description: >
+  Array.prototype.copyWithin.name value and descriptor.
+info: |
+  22.1.3.3 Array.prototype.copyWithin (target, start [ , end ] )
+
+  17 ECMAScript Standard Built-in Objects
+
+includes: [propertyHelper.js]
+---*/
+
+assert.sameValue(
+  Array.prototype.copyWithin.name, 'copyWithin',
+  'The value of `Array.prototype.copyWithin.name` is `"copyWithin"`'
+);
+
+verifyNotEnumerable(Array.prototype.copyWithin, 'name');
+verifyNotWritable(Array.prototype.copyWithin, 'name');
+verifyConfigurable(Array.prototype.copyWithin, 'name');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/copyWithin/negative-end.js b/js/src/tests/test262/built-ins/Array/prototype/copyWithin/negative-end.js
new file mode 100644
index 0000000000..3bea4299b5
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/copyWithin/negative-end.js
@@ -0,0 +1,60 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.copywithin
+description: >
+  Set values with negative end argument.
+info: |
+  22.1.3.3 Array.prototype.copyWithin (target, start [ , end ] )
+
+  ...
+  11. If end is undefined, let relativeEnd be len; else let relativeEnd be
+  ToInteger(end).
+  12. ReturnIfAbrupt(relativeEnd).
+  13. If relativeEnd < 0, let final be max((len + relativeEnd),0); else let
+  final be min(relativeEnd, len).
+  ...
+includes: [compareArray.js]
+---*/
+
+assert.compareArray(
+  [0, 1, 2, 3].copyWithin(0, 1, -1), [1, 2, 2, 3],
+  '[0, 1, 2, 3].copyWithin(0, 1, -1) must return [1, 2, 2, 3]'
+);
+
+assert.compareArray(
+  [0, 1, 2, 3, 4].copyWithin(2, 0, -1), [0, 1, 0, 1, 2],
+  '[0, 1, 2, 3, 4].copyWithin(2, 0, -1) must return [0, 1, 0, 1, 2]'
+);
+
+assert.compareArray(
+  [0, 1, 2, 3, 4].copyWithin(1, 2, -2), [0, 2, 2, 3, 4],
+  '[0, 1, 2, 3, 4].copyWithin(1, 2, -2) must return [0, 2, 2, 3, 4]'
+);
+
+assert.compareArray(
+  [0, 1, 2, 3].copyWithin(0, -2, -1), [2, 1, 2, 3],
+  '[0, 1, 2, 3].copyWithin(0, -2, -1) must return [2, 1, 2, 3]'
+);
+
+assert.compareArray(
+  [0, 1, 2, 3, 4].copyWithin(2, -2, -1), [0, 1, 3, 3, 4],
+  '[0, 1, 2, 3, 4].copyWithin(2, -2, -1) must return [0, 1, 3, 3, 4]'
+);
+
+assert.compareArray(
+  [0, 1, 2, 3].copyWithin(-3, -2, -1), [0, 2, 2, 3],
+  '[0, 1, 2, 3].copyWithin(-3, -2, -1) must return [0, 2, 2, 3]'
+);
+
+assert.compareArray(
+  [0, 1, 2, 3, 4].copyWithin(-2, -3, -1), [0, 1, 2, 2, 3],
+  '[0, 1, 2, 3, 4].copyWithin(-2, -3, -1) must return [0, 1, 2, 2, 3]'
+);
+
+assert.compareArray(
+  [0, 1, 2, 3, 4].copyWithin(-5, -2, -1), [3, 1, 2, 3, 4],
+  '[0, 1, 2, 3, 4].copyWithin(-5, -2, -1) must return [3, 1, 2, 3, 4]'
+);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/copyWithin/negative-out-of-bounds-end.js b/js/src/tests/test262/built-ins/Array/prototype/copyWithin/negative-out-of-bounds-end.js
new file mode 100644
index 0000000000..acd8f91c95
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/copyWithin/negative-out-of-bounds-end.js
@@ -0,0 +1,70 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.copywithin
+description: >
+  Set values with negative out of bounds end argument.
+info: |
+  22.1.3.3 Array.prototype.copyWithin (target, start [ , end ] )
+
+  ...
+  11. If end is undefined, let relativeEnd be len; else let relativeEnd be
+  ToInteger(end).
+  12. ReturnIfAbrupt(relativeEnd).
+  13. If relativeEnd < 0, let final be max((len + relativeEnd),0); else let
+  final be min(relativeEnd, len).
+  ...
+includes: [compareArray.js]
+---*/
+
+assert.compareArray(
+  [0, 1, 2, 3].copyWithin(0, 1, -10), [0, 1, 2, 3],
+  '[0, 1, 2, 3].copyWithin(0, 1, -10) must return [0, 1, 2, 3]'
+);
+
+assert.compareArray(
+  [1, 2, 3, 4, 5].copyWithin(0, 1, -Infinity), [1, 2, 3, 4, 5],
+  '[1, 2, 3, 4, 5].copyWithin(0, 1, -Infinity) must return [1, 2, 3, 4, 5]'
+);
+
+assert.compareArray(
+  [0, 1, 2, 3].copyWithin(0, -2, -10), [0, 1, 2, 3],
+  '[0, 1, 2, 3].copyWithin(0, -2, -10) must return [0, 1, 2, 3]'
+);
+
+assert.compareArray(
+  [1, 2, 3, 4, 5].copyWithin(0, -2, -Infinity), [1, 2, 3, 4, 5],
+  '[1, 2, 3, 4, 5].copyWithin(0, -2, -Infinity) must return [1, 2, 3, 4, 5]'
+);
+
+assert.compareArray(
+  [0, 1, 2, 3].copyWithin(0, -9, -10), [0, 1, 2, 3],
+  '[0, 1, 2, 3].copyWithin(0, -9, -10) must return [0, 1, 2, 3]'
+);
+
+assert.compareArray(
+  [1, 2, 3, 4, 5].copyWithin(0, -9, -Infinity), [1, 2, 3, 4, 5],
+  '[1, 2, 3, 4, 5].copyWithin(0, -9, -Infinity) must return [1, 2, 3, 4, 5]'
+);
+
+assert.compareArray(
+  [0, 1, 2, 3].copyWithin(-3, -2, -10), [0, 1, 2, 3],
+  '[0, 1, 2, 3].copyWithin(-3, -2, -10) must return [0, 1, 2, 3]'
+);
+
+assert.compareArray(
+  [1, 2, 3, 4, 5].copyWithin(-3, -2, -Infinity), [1, 2, 3, 4, 5],
+  '[1, 2, 3, 4, 5].copyWithin(-3, -2, -Infinity) must return [1, 2, 3, 4, 5]'
+);
+
+assert.compareArray(
+  [0, 1, 2, 3].copyWithin(-7, -8, -9), [0, 1, 2, 3],
+  '[0, 1, 2, 3].copyWithin(-7, -8, -9) must return [0, 1, 2, 3]'
+);
+
+assert.compareArray(
+  [1, 2, 3, 4, 5].copyWithin(-7, -8, -Infinity), [1, 2, 3, 4, 5],
+  '[1, 2, 3, 4, 5].copyWithin(-7, -8, -Infinity) must return [1, 2, 3, 4, 5]'
+);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/copyWithin/negative-out-of-bounds-start.js b/js/src/tests/test262/built-ins/Array/prototype/copyWithin/negative-out-of-bounds-start.js
new file mode 100644
index 0000000000..7faf5378eb
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/copyWithin/negative-out-of-bounds-start.js
@@ -0,0 +1,59 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.copywithin
+description: >
+  Set values with out of bounds negative start argument.
+info: |
+  22.1.3.3 Array.prototype.copyWithin (target, start [ , end ] )
+
+  ...
+  10. If relativeStart < 0, let from be max((len + relativeStart),0); else let
+  from be min(relativeStart, len).
+  ...
+includes: [compareArray.js]
+---*/
+
+assert.compareArray(
+  [0, 1, 2, 3].copyWithin(0, -10), [0, 1, 2, 3],
+  '[0, 1, 2, 3].copyWithin(0, -10) must return [0, 1, 2, 3]'
+);
+
+assert.compareArray(
+  [1, 2, 3, 4, 5].copyWithin(0, -Infinity), [1, 2, 3, 4, 5],
+  '[1, 2, 3, 4, 5].copyWithin(0, -Infinity) must return [1, 2, 3, 4, 5]'
+);
+
+assert.compareArray(
+  [0, 1, 2, 3, 4].copyWithin(2, -10), [0, 1, 0, 1, 2],
+  '[0, 1, 2, 3, 4].copyWithin(2, -10) must return [0, 1, 0, 1, 2]'
+);
+
+assert.compareArray(
+  [1, 2, 3, 4, 5].copyWithin(2, -Infinity), [1, 2, 1, 2, 3],
+  '[1, 2, 3, 4, 5].copyWithin(2, -Infinity) must return [1, 2, 1, 2, 3]'
+);
+
+
+assert.compareArray(
+  [0, 1, 2, 3, 4].copyWithin(10, -10), [0, 1, 2, 3, 4],
+  '[0, 1, 2, 3, 4].copyWithin(10, -10) must return [0, 1, 2, 3, 4]'
+);
+
+assert.compareArray(
+  [1, 2, 3, 4, 5].copyWithin(10, -Infinity), [1, 2, 3, 4, 5],
+  '[1, 2, 3, 4, 5].copyWithin(10, -Infinity) must return [1, 2, 3, 4, 5]'
+);
+
+
+assert.compareArray(
+  [0, 1, 2, 3].copyWithin(-9, -10), [0, 1, 2, 3],
+  '[0, 1, 2, 3].copyWithin(-9, -10) must return [0, 1, 2, 3]'
+);
+
+assert.compareArray(
+  [1, 2, 3, 4, 5].copyWithin(-9, -Infinity), [1, 2, 3, 4, 5],
+  '[1, 2, 3, 4, 5].copyWithin(-9, -Infinity) must return [1, 2, 3, 4, 5]'
+);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/copyWithin/negative-out-of-bounds-target.js b/js/src/tests/test262/built-ins/Array/prototype/copyWithin/negative-out-of-bounds-target.js
new file mode 100644
index 0000000000..6bc927c1fc
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/copyWithin/negative-out-of-bounds-target.js
@@ -0,0 +1,37 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.copywithin
+description: >
+  Set values with out of bounds negative target argument.
+info: |
+  22.1.3.3 Array.prototype.copyWithin (target, start [ , end ] )
+
+  ...
+  7. If relativeTarget < 0, let to be max((len + relativeTarget),0); else let to
+  be min(relativeTarget, len).
+  ...
+includes: [compareArray.js]
+---*/
+
+assert.compareArray(
+  [0, 1, 2, 3].copyWithin(-10, 0), [0, 1, 2, 3],
+  '[0, 1, 2, 3].copyWithin(-10, 0) must return [0, 1, 2, 3]'
+);
+
+assert.compareArray(
+  [1, 2, 3, 4, 5].copyWithin(-Infinity, 0), [1, 2, 3, 4, 5],
+  '[1, 2, 3, 4, 5].copyWithin(-Infinity, 0) must return [1, 2, 3, 4, 5]'
+);
+
+assert.compareArray(
+  [0, 1, 2, 3, 4].copyWithin(-10, 2), [2, 3, 4, 3, 4],
+  '[0, 1, 2, 3, 4].copyWithin(-10, 2) must return [2, 3, 4, 3, 4]'
+);
+
+assert.compareArray(
+  [1, 2, 3, 4, 5].copyWithin(-Infinity, 2), [3, 4, 5, 4, 5],
+  '[1, 2, 3, 4, 5].copyWithin(-Infinity, 2) must return [3, 4, 5, 4, 5]'
+);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/copyWithin/negative-start.js b/js/src/tests/test262/built-ins/Array/prototype/copyWithin/negative-start.js
new file mode 100644
index 0000000000..9bed566c60
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/copyWithin/negative-start.js
@@ -0,0 +1,47 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.copywithin
+description: >
+  Set values with negative start argument.
+info: |
+  22.1.3.3 Array.prototype.copyWithin (target, start [ , end ] )
+
+  ...
+  10. If relativeStart < 0, let from be max((len + relativeStart),0); else let
+  from be min(relativeStart, len).
+  ...
+includes: [compareArray.js]
+---*/
+
+assert.compareArray(
+  [0, 1, 2, 3].copyWithin(0, -1), [3, 1, 2, 3],
+  '[0, 1, 2, 3].copyWithin(0, -1) must return [3, 1, 2, 3]'
+);
+
+assert.compareArray(
+  [0, 1, 2, 3, 4].copyWithin(2, -2), [0, 1, 3, 4, 4],
+  '[0, 1, 2, 3, 4].copyWithin(2, -2) must return [0, 1, 3, 4, 4]'
+);
+
+assert.compareArray(
+  [0, 1, 2, 3, 4].copyWithin(1, -2), [0, 3, 4, 3, 4],
+  '[0, 1, 2, 3, 4].copyWithin(1, -2) must return [0, 3, 4, 3, 4]'
+);
+
+assert.compareArray(
+  [0, 1, 2, 3].copyWithin(-1, -2), [0, 1, 2, 2],
+  '[0, 1, 2, 3].copyWithin(-1, -2) must return [0, 1, 2, 2]'
+);
+
+assert.compareArray(
+  [0, 1, 2, 3, 4].copyWithin(-2, -3), [0, 1, 2, 2, 3],
+  '[0, 1, 2, 3, 4].copyWithin(-2, -3) must return [0, 1, 2, 2, 3]'
+);
+
+assert.compareArray(
+  [0, 1, 2, 3, 4].copyWithin(-5, -2), [3, 4, 2, 3, 4],
+  '[0, 1, 2, 3, 4].copyWithin(-5, -2) must return [3, 4, 2, 3, 4]'
+);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/copyWithin/negative-target.js b/js/src/tests/test262/built-ins/Array/prototype/copyWithin/negative-target.js
new file mode 100644
index 0000000000..232ddf0d2d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/copyWithin/negative-target.js
@@ -0,0 +1,32 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.copywithin
+description: >
+  Set values with negative target argument.
+info: |
+  22.1.3.3 Array.prototype.copyWithin (target, start [ , end ] )
+
+  ...
+  7. If relativeTarget < 0, let to be max((len + relativeTarget),0); else let to
+  be min(relativeTarget, len).
+  ...
+includes: [compareArray.js]
+---*/
+
+assert.compareArray(
+  [0, 1, 2, 3].copyWithin(-1, 0), [0, 1, 2, 0],
+  '[0, 1, 2, 3].copyWithin(-1, 0) must return [0, 1, 2, 0]'
+);
+
+assert.compareArray(
+  [0, 1, 2, 3, 4].copyWithin(-2, 2), [0, 1, 2, 2, 3],
+  '[0, 1, 2, 3, 4].copyWithin(-2, 2) must return [0, 1, 2, 2, 3]'
+);
+
+assert.compareArray(
+  [0, 1, 2, 3].copyWithin(-1, 2), [0, 1, 2, 2],
+  '[0, 1, 2, 3].copyWithin(-1, 2) must return [0, 1, 2, 2]'
+);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/copyWithin/non-negative-out-of-bounds-end.js b/js/src/tests/test262/built-ins/Array/prototype/copyWithin/non-negative-out-of-bounds-end.js
new file mode 100644
index 0000000000..079beae545
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/copyWithin/non-negative-out-of-bounds-end.js
@@ -0,0 +1,56 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.copywithin
+description: >
+  Max value of end position is the this.length.
+info: |
+  22.1.3.3 Array.prototype.copyWithin (target, start [ , end ] )
+
+  ...
+  7. If relativeTarget < 0, let to be max((len + relativeTarget),0); else let to
+  be min(relativeTarget, len).
+  ...
+  10. If relativeStart < 0, let from be max((len + relativeStart),0); else let
+  from be min(relativeStart, len).
+  11. If end is undefined, let relativeEnd be len; else let relativeEnd be
+  ToInteger(end).
+  ...
+  14. Let count be min(final-from, len-to).
+  15. If from<to and to<from+count
+    a. Let direction be -1.
+    b. Let from be from + count -1.
+    c. Let to be to + count -1.
+  16. Else,
+    a. Let direction = 1.
+  17. Repeat, while count > 0
+    ...
+    a. If fromPresent is true, then
+      i. Let fromVal be Get(O, fromKey).
+      ...
+      iii. Let setStatus be Set(O, toKey, fromVal, true).
+  ...
+includes: [compareArray.js]
+---*/
+
+assert.compareArray(
+  [0, 1, 2, 3].copyWithin(0, 1, 6), [1, 2, 3, 3],
+  '[0, 1, 2, 3].copyWithin(0, 1, 6) must return [1, 2, 3, 3]'
+);
+
+assert.compareArray(
+  [0, 1, 2, 3].copyWithin(0, 1, Infinity), [1, 2, 3, 3],
+  '[0, 1, 2, 3].copyWithin(0, 1, Infinity) must return [1, 2, 3, 3]'
+);
+
+assert.compareArray(
+  [0, 1, 2, 3, 4, 5].copyWithin(1, 3, 6), [0, 3, 4, 5, 4, 5],
+  '[0, 1, 2, 3, 4, 5].copyWithin(1, 3, 6) must return [0, 3, 4, 5, 4, 5]'
+);
+
+assert.compareArray(
+  [0, 1, 2, 3, 4, 5].copyWithin(1, 3, Infinity), [0, 3, 4, 5, 4, 5],
+  '[0, 1, 2, 3, 4, 5].copyWithin(1, 3, Infinity) must return [0, 3, 4, 5, 4, 5]'
+);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/copyWithin/non-negative-out-of-bounds-target-and-start.js b/js/src/tests/test262/built-ins/Array/prototype/copyWithin/non-negative-out-of-bounds-target-and-start.js
new file mode 100644
index 0000000000..13f3ff3388
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/copyWithin/non-negative-out-of-bounds-target-and-start.js
@@ -0,0 +1,107 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.copywithin
+description: >
+  Max values of target and start positions are this.length.
+info: |
+  22.1.3.3 Array.prototype.copyWithin (target, start [ , end ] )
+
+  ...
+  7. If relativeTarget < 0, let to be max((len + relativeTarget),0); else let to
+  be min(relativeTarget, len).
+  ...
+  10. If relativeStart < 0, let from be max((len + relativeStart),0); else let
+  from be min(relativeStart, len).
+  11. If end is undefined, let relativeEnd be len; else let relativeEnd be
+  ToInteger(end).
+  ...
+  14. Let count be min(final-from, len-to).
+  15. If from<to and to<from+count
+    ...
+  16. Else,
+    a. Let direction = 1.
+  17. Repeat, while count > 0
+    ...
+  ...
+includes: [compareArray.js]
+---*/
+
+assert.compareArray(
+  [0, 1, 2, 3, 4, 5].copyWithin(6, 0), [0, 1, 2, 3, 4, 5],
+  '[0, 1, 2, 3, 4, 5].copyWithin(6, 0) must return [0, 1, 2, 3, 4, 5]'
+);
+
+assert.compareArray(
+  [0, 1, 2, 3, 4, 5].copyWithin(7, 0), [0, 1, 2, 3, 4, 5],
+  '[0, 1, 2, 3, 4, 5].copyWithin(7, 0) must return [0, 1, 2, 3, 4, 5]'
+);
+
+assert.compareArray(
+  [0, 1, 2, 3, 4, 5].copyWithin(Infinity, 0), [0, 1, 2, 3, 4, 5],
+  '[0, 1, 2, 3, 4, 5].copyWithin(Infinity, 0) must return [0, 1, 2, 3, 4, 5]'
+);
+
+assert.compareArray(
+  [0, 1, 2, 3, 4, 5].copyWithin(6, 2), [0, 1, 2, 3, 4, 5],
+  '[0, 1, 2, 3, 4, 5].copyWithin(6, 2) must return [0, 1, 2, 3, 4, 5]'
+);
+
+assert.compareArray(
+  [0, 1, 2, 3, 4, 5].copyWithin(7, 2), [0, 1, 2, 3, 4, 5],
+  '[0, 1, 2, 3, 4, 5].copyWithin(7, 2) must return [0, 1, 2, 3, 4, 5]'
+);
+
+assert.compareArray(
+  [0, 1, 2, 3, 4, 5].copyWithin(Infinity, 2), [0, 1, 2, 3, 4, 5],
+  '[0, 1, 2, 3, 4, 5].copyWithin(Infinity, 2) must return [0, 1, 2, 3, 4, 5]'
+);
+
+assert.compareArray(
+  [0, 1, 2, 3, 4, 5].copyWithin(0, 6), [0, 1, 2, 3, 4, 5],
+  '[0, 1, 2, 3, 4, 5].copyWithin(0, 6) must return [0, 1, 2, 3, 4, 5]'
+);
+
+assert.compareArray(
+  [0, 1, 2, 3, 4, 5].copyWithin(0, 7), [0, 1, 2, 3, 4, 5],
+  '[0, 1, 2, 3, 4, 5].copyWithin(0, 7) must return [0, 1, 2, 3, 4, 5]'
+);
+
+
+assert.compareArray(
+  [0, 1, 2, 3, 4, 5].copyWithin(0, Infinity), [0, 1, 2, 3, 4, 5],
+  '[0, 1, 2, 3, 4, 5].copyWithin(0, Infinity) must return [0, 1, 2, 3, 4, 5]'
+);
+
+assert.compareArray(
+  [0, 1, 2, 3, 4, 5].copyWithin(2, 6), [0, 1, 2, 3, 4, 5],
+  '[0, 1, 2, 3, 4, 5].copyWithin(2, 6) must return [0, 1, 2, 3, 4, 5]'
+);
+
+assert.compareArray(
+  [0, 1, 2, 3, 4, 5].copyWithin(1, 7), [0, 1, 2, 3, 4, 5],
+  '[0, 1, 2, 3, 4, 5].copyWithin(1, 7) must return [0, 1, 2, 3, 4, 5]'
+);
+
+
+assert.compareArray(
+  [0, 1, 2, 3, 4, 5].copyWithin(3, Infinity), [0, 1, 2, 3, 4, 5],
+  '[0, 1, 2, 3, 4, 5].copyWithin(3, Infinity) must return [0, 1, 2, 3, 4, 5]'
+);
+
+assert.compareArray(
+  [0, 1, 2, 3, 4, 5].copyWithin(6, 6), [0, 1, 2, 3, 4, 5],
+  '[0, 1, 2, 3, 4, 5].copyWithin(6, 6) must return [0, 1, 2, 3, 4, 5]'
+);
+
+assert.compareArray(
+  [0, 1, 2, 3, 4, 5].copyWithin(10, 10), [0, 1, 2, 3, 4, 5],
+  '[0, 1, 2, 3, 4, 5].copyWithin(10, 10) must return [0, 1, 2, 3, 4, 5]'
+);
+
+assert.compareArray(
+  [0, 1, 2, 3, 4, 5].copyWithin(Infinity, Infinity), [0, 1, 2, 3, 4, 5],
+  '[0, 1, 2, 3, 4, 5].copyWithin(Infinity, Infinity) must return [0, 1, 2, 3, 4, 5]'
+);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/copyWithin/non-negative-target-and-start.js b/js/src/tests/test262/built-ins/Array/prototype/copyWithin/non-negative-target-and-start.js
new file mode 100644
index 0000000000..da1d411abc
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/copyWithin/non-negative-target-and-start.js
@@ -0,0 +1,54 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.copywithin
+description: >
+  Copy values with non-negative target and start positions.
+info: |
+  22.1.3.3 Array.prototype.copyWithin (target, start [ , end ] )
+
+  ...
+  7. If relativeTarget < 0, let to be max((len + relativeTarget),0); else let to
+  be min(relativeTarget, len).
+  ...
+  10. If relativeStart < 0, let from be max((len + relativeStart),0); else let
+  from be min(relativeStart, len).
+  11. If end is undefined, let relativeEnd be len; else let relativeEnd be
+  ToInteger(end).
+  ...
+  14. Let count be min(final-from, len-to).
+  15. If from<to and to<from+count
+    ...
+  16. Else,
+    a. Let direction = 1.
+  17. Repeat, while count > 0
+    ...
+    a. If fromPresent is true, then
+      i. Let fromVal be Get(O, fromKey).
+      ...
+      iii. Let setStatus be Set(O, toKey, fromVal, true).
+  ...
+includes: [compareArray.js]
+---*/
+
+assert.compareArray(
+  ['a', 'b', 'c', 'd', 'e', 'f'].copyWithin(0, 0),
+  ['a', 'b', 'c', 'd', 'e', 'f']
+);
+
+assert.compareArray(
+  ['a', 'b', 'c', 'd', 'e', 'f'].copyWithin(0, 2),
+  ['c', 'd', 'e', 'f', 'e', 'f']
+);
+
+assert.compareArray(
+  ['a', 'b', 'c', 'd', 'e', 'f'].copyWithin(3, 0),
+  ['a', 'b', 'c', 'a', 'b', 'c']
+);
+
+assert.compareArray(
+  [0, 1, 2, 3, 4, 5].copyWithin(1, 4),
+  [0, 4, 5, 3, 4, 5]
+);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/copyWithin/non-negative-target-start-and-end.js b/js/src/tests/test262/built-ins/Array/prototype/copyWithin/non-negative-target-start-and-end.js
new file mode 100644
index 0000000000..ffbda9c208
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/copyWithin/non-negative-target-start-and-end.js
@@ -0,0 +1,72 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.copywithin
+description: >
+  Copy values with non-negative target, start and end positions.
+info: |
+  22.1.3.3 Array.prototype.copyWithin (target, start [ , end ] )
+
+  ...
+  7. If relativeTarget < 0, let to be max((len + relativeTarget),0); else let to
+  be min(relativeTarget, len).
+  ...
+  10. If relativeStart < 0, let from be max((len + relativeStart),0); else let
+  from be min(relativeStart, len).
+  11. If end is undefined, let relativeEnd be len; else let relativeEnd be
+  ToInteger(end).
+  ...
+  14. Let count be min(final-from, len-to).
+  15. If from<to and to<from+count
+    a. Let direction be -1.
+    b. Let from be from + count -1.
+    c. Let to be to + count -1.
+  16. Else,
+    a. Let direction = 1.
+  17. Repeat, while count > 0
+    ...
+    a. If fromPresent is true, then
+      i. Let fromVal be Get(O, fromKey).
+      ...
+      iii. Let setStatus be Set(O, toKey, fromVal, true).
+  ...
+includes: [compareArray.js]
+---*/
+
+assert.compareArray(
+  [0, 1, 2, 3].copyWithin(0, 0, 0), [0, 1, 2, 3],
+  '[0, 1, 2, 3].copyWithin(0, 0, 0) must return [0, 1, 2, 3]'
+);
+
+assert.compareArray(
+  [0, 1, 2, 3].copyWithin(0, 0, 2), [0, 1, 2, 3],
+  '[0, 1, 2, 3].copyWithin(0, 0, 2) must return [0, 1, 2, 3]'
+);
+
+assert.compareArray(
+  [0, 1, 2, 3].copyWithin(0, 1, 2), [1, 1, 2, 3],
+  '[0, 1, 2, 3].copyWithin(0, 1, 2) must return [1, 1, 2, 3]'
+);
+
+/*
+ * 15. If from<to and to<from+count
+ *   a. Let direction be -1.
+ *   b. Let from be from + count -1.
+ *   c. Let to be to + count -1.
+ *
+ *  0 < 1, 1 < 0 + 2
+ *  direction = -1
+ *  from = 0 + 2 - 1
+ *  to = 1 + 2 - 1
+ */
+assert.compareArray(
+  [0, 1, 2, 3].copyWithin(1, 0, 2), [0, 0, 1, 3],
+  '[0, 1, 2, 3].copyWithin(1, 0, 2) must return [0, 0, 1, 3]'
+);
+
+assert.compareArray(
+  [0, 1, 2, 3, 4, 5].copyWithin(1, 3, 5), [0, 3, 4, 3, 4, 5],
+  '[0, 1, 2, 3, 4, 5].copyWithin(1, 3, 5) must return [0, 3, 4, 3, 4, 5]'
+);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/copyWithin/not-a-constructor.js b/js/src/tests/test262/built-ins/Array/prototype/copyWithin/not-a-constructor.js
new file mode 100644
index 0000000000..f16770a6c5
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/copyWithin/not-a-constructor.js
@@ -0,0 +1,35 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Array.prototype.copyWithin does not implement [[Construct]], is not new-able
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+
+  sec-evaluatenew
+
+  ...
+  7. If IsConstructor(constructor) is false, throw a TypeError exception.
+  ...
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Array.prototype.copyWithin),
+  false,
+  'isConstructor(Array.prototype.copyWithin) must return false'
+);
+
+assert.throws(TypeError, () => {
+  new Array.prototype.copyWithin();
+}, '`new Array.prototype.copyWithin()` throws TypeError');
+
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/copyWithin/prop-desc.js b/js/src/tests/test262/built-ins/Array/prototype/copyWithin/prop-desc.js
new file mode 100644
index 0000000000..0142ba32ed
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/copyWithin/prop-desc.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.copywithin
+description: Property type and descriptor.
+info: |
+  22.1.3.3 Array.prototype.copyWithin (target, start [ , end ] )
+
+  17 ECMAScript Standard Built-in Objects
+includes: [propertyHelper.js]
+---*/
+
+assert.sameValue(
+  typeof Array.prototype.copyWithin,
+  'function',
+  '`typeof Array.prototype.copyWithin` is `function`'
+);
+
+verifyNotEnumerable(Array.prototype, 'copyWithin');
+verifyWritable(Array.prototype, 'copyWithin');
+verifyConfigurable(Array.prototype, 'copyWithin');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/copyWithin/return-abrupt-from-delete-proxy-target.js b/js/src/tests/test262/built-ins/Array/prototype/copyWithin/return-abrupt-from-delete-proxy-target.js
new file mode 100644
index 0000000000..efbb992e30
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/copyWithin/return-abrupt-from-delete-proxy-target.js
@@ -0,0 +1,40 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.copywithin
+description: >
+  Return abrupt from deleting property value - using Proxy
+info: |
+  22.1.3.3 Array.prototype.copyWithin (target, start [ , end ] )
+
+  ...
+  17. Repeat, while count > 0
+    a. Let fromKey be ToString(from).
+    b. Let toKey be ToString(to).
+    c. Let fromPresent be HasProperty(O, fromKey).
+    ...
+    f. Else fromPresent is false,
+      i. Let deleteStatus be DeletePropertyOrThrow(O, toKey).
+      ii. ReturnIfAbrupt(deleteStatus).
+  ...
+features: [Proxy]
+---*/
+
+var o = {
+  '42': true,
+  length: 43
+};
+
+var p = new Proxy(o, {
+  deleteProperty: function(t, prop) {
+    if (prop === '42') {
+      throw new Test262Error();
+    }
+  }
+});
+
+assert.throws(Test262Error, function() {
+  Array.prototype.copyWithin.call(p, 42, 0);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/copyWithin/return-abrupt-from-delete-target.js b/js/src/tests/test262/built-ins/Array/prototype/copyWithin/return-abrupt-from-delete-target.js
new file mode 100644
index 0000000000..14c970ecb5
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/copyWithin/return-abrupt-from-delete-target.js
@@ -0,0 +1,35 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.copywithin
+description: >
+  Return abrupt from deleting property value on DeletePropertyOrThrow(O, toKey).
+info: |
+  22.1.3.3 Array.prototype.copyWithin (target, start [ , end ] )
+
+  ...
+  17. Repeat, while count > 0
+    a. Let fromKey be ToString(from).
+    b. Let toKey be ToString(to).
+    c. Let fromPresent be HasProperty(O, fromKey).
+    ...
+    f. Else fromPresent is false,
+      i. Let deleteStatus be DeletePropertyOrThrow(O, toKey).
+      ii. ReturnIfAbrupt(deleteStatus).
+  ...
+---*/
+
+var o = {
+  length: 43
+};
+
+Object.defineProperty(o, '42', {
+  configurable: false,
+  writable: true
+});
+
+assert.throws(TypeError, function() {
+  Array.prototype.copyWithin.call(o, 42, 0);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/copyWithin/return-abrupt-from-end-as-symbol.js b/js/src/tests/test262/built-ins/Array/prototype/copyWithin/return-abrupt-from-end-as-symbol.js
new file mode 100644
index 0000000000..345ad8d3c6
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/copyWithin/return-abrupt-from-end-as-symbol.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.copywithin
+description: >
+  Return abrupt from end as a Symbol.
+info: |
+  22.1.3.3 Array.prototype.copyWithin (target, start [ , end ] )
+
+  ...
+  11. If end is undefined, let relativeEnd be len; else let relativeEnd be
+  ToInteger(end).
+  12. ReturnIfAbrupt(relativeEnd).
+  ...
+features: [Symbol]
+---*/
+
+var s = Symbol(1);
+assert.throws(TypeError, function() {
+  [].copyWithin(0, 0, s);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/copyWithin/return-abrupt-from-end.js b/js/src/tests/test262/built-ins/Array/prototype/copyWithin/return-abrupt-from-end.js
new file mode 100644
index 0000000000..cfe2a7353f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/copyWithin/return-abrupt-from-end.js
@@ -0,0 +1,26 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.copywithin
+description: >
+  Return abrupt from ToInteger(end).
+info: |
+  22.1.3.3 Array.prototype.copyWithin (target, start [ , end ] )
+
+  ...
+  11. If end is undefined, let relativeEnd be len; else let relativeEnd be
+  ToInteger(end).
+  12. ReturnIfAbrupt(relativeEnd).
+  ...
+---*/
+
+var o1 = {
+  valueOf: function() {
+    throw new Test262Error();
+  }
+};
+assert.throws(Test262Error, function() {
+  [].copyWithin(0, 0, o1);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/copyWithin/return-abrupt-from-get-start-value.js b/js/src/tests/test262/built-ins/Array/prototype/copyWithin/return-abrupt-from-get-start-value.js
new file mode 100644
index 0000000000..559520b1c0
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/copyWithin/return-abrupt-from-get-start-value.js
@@ -0,0 +1,41 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.copywithin
+description: >
+  Return abrupt from getting property value - Get(O, fromKey).
+info: |
+  22.1.3.3 Array.prototype.copyWithin (target, start [ , end ] )
+
+  ...
+  8. Let relativeStart be ToInteger(start).
+  9. ReturnIfAbrupt(relativeStart).
+  10. If relativeStart < 0, let from be max((len + relativeStart),0); else let
+  from be min(relativeStart, len).
+  ...
+  17. Repeat, while count > 0
+    a. Let fromKey be ToString(from).
+    b. Let toKey be ToString(to).
+    c. Let fromPresent be HasProperty(O, fromKey).
+    d. ReturnIfAbrupt(fromPresent).
+    e. If fromPresent is true, then
+      i. Let fromVal be Get(O, fromKey).
+      ii. ReturnIfAbrupt(fromVal).
+  ...
+---*/
+
+var o = {
+  length: 1
+};
+
+Object.defineProperty(o, '0', {
+  get: function() {
+    throw new Test262Error();
+  }
+});
+
+assert.throws(Test262Error, function() {
+  Array.prototype.copyWithin.call(o, 0, 0);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/copyWithin/return-abrupt-from-has-start.js b/js/src/tests/test262/built-ins/Array/prototype/copyWithin/return-abrupt-from-has-start.js
new file mode 100644
index 0000000000..8a7d16735c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/copyWithin/return-abrupt-from-has-start.js
@@ -0,0 +1,40 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.copywithin
+description: >
+  Return abrupt from HasProperty(O, fromKey).
+info: |
+  22.1.3.3 Array.prototype.copyWithin (target, start [ , end ] )
+
+  ...
+  8. Let relativeStart be ToInteger(start).
+  9. ReturnIfAbrupt(relativeStart).
+  10. If relativeStart < 0, let from be max((len + relativeStart),0); else let
+  from be min(relativeStart, len).
+  ...
+  17. Repeat, while count > 0
+    a. Let fromKey be ToString(from).
+    b. Let toKey be ToString(to).
+    c. Let fromPresent be HasProperty(O, fromKey).
+    d. ReturnIfAbrupt(fromPresent).
+  ...
+features: [Proxy]
+---*/
+
+var o = {
+  '0': 42,
+  length: 1
+};
+
+var p = new Proxy(o, {
+  has: function() {
+    throw new Test262Error();
+  }
+});
+
+assert.throws(Test262Error, function() {
+  Array.prototype.copyWithin.call(p, 0, 0);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/copyWithin/return-abrupt-from-set-target-value.js b/js/src/tests/test262/built-ins/Array/prototype/copyWithin/return-abrupt-from-set-target-value.js
new file mode 100644
index 0000000000..fa66f8a706
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/copyWithin/return-abrupt-from-set-target-value.js
@@ -0,0 +1,42 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.copywithin
+description: >
+  Return abrupt from setting property value - Set(O, toKey, fromVal, true).
+info: |
+  22.1.3.3 Array.prototype.copyWithin (target, start [ , end ] )
+
+  ...
+  5. Let relativeTarget be ToInteger(target).
+  6. ReturnIfAbrupt(relativeTarget).
+  7. If relativeTarget < 0, let to be max((len + relativeTarget),0); else let to
+  be min(relativeTarget, len).
+  ...
+  17. Repeat, while count > 0
+    a. Let fromKey be ToString(from).
+    b. Let toKey be ToString(to).
+    ...
+    e. If fromPresent is true, then
+      ...
+      iii. Let setStatus be Set(O, toKey, fromVal, true).
+      iv. ReturnIfAbrupt(setStatus).
+  ...
+---*/
+
+var o = {
+  '0': true,
+  length: 43
+};
+
+Object.defineProperty(o, '42', {
+  set: function() {
+    throw new Test262Error();
+  }
+});
+
+assert.throws(Test262Error, function() {
+  Array.prototype.copyWithin.call(o, 42, 0);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/copyWithin/return-abrupt-from-start-as-symbol.js b/js/src/tests/test262/built-ins/Array/prototype/copyWithin/return-abrupt-from-start-as-symbol.js
new file mode 100644
index 0000000000..a766cafaeb
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/copyWithin/return-abrupt-from-start-as-symbol.js
@@ -0,0 +1,22 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.copywithin
+description: >
+  Return abrupt from start as a Symbol.
+info: |
+  22.1.3.3 Array.prototype.copyWithin (target, start [ , end ] )
+
+  ...
+  8. Let relativeStart be ToInteger(start).
+  9. ReturnIfAbrupt(relativeStart).
+  ...
+features: [Symbol]
+---*/
+
+var s = Symbol(1);
+assert.throws(TypeError, function() {
+  [].copyWithin(0, s);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/copyWithin/return-abrupt-from-start.js b/js/src/tests/test262/built-ins/Array/prototype/copyWithin/return-abrupt-from-start.js
new file mode 100644
index 0000000000..93eb3cf5d2
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/copyWithin/return-abrupt-from-start.js
@@ -0,0 +1,25 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.copywithin
+description: >
+  Return abrupt from ToInteger(start).
+info: |
+  22.1.3.3 Array.prototype.copyWithin (target, start [ , end ] )
+
+  ...
+  8. Let relativeStart be ToInteger(start).
+  9. ReturnIfAbrupt(relativeStart).
+  ...
+---*/
+
+var o1 = {
+  valueOf: function() {
+    throw new Test262Error();
+  }
+};
+assert.throws(Test262Error, function() {
+  [].copyWithin(0, o1);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/copyWithin/return-abrupt-from-target-as-symbol.js b/js/src/tests/test262/built-ins/Array/prototype/copyWithin/return-abrupt-from-target-as-symbol.js
new file mode 100644
index 0000000000..2c318faa5e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/copyWithin/return-abrupt-from-target-as-symbol.js
@@ -0,0 +1,22 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.copywithin
+description: >
+  Return abrupt from target as a Symbol.
+info: |
+  22.1.3.3 Array.prototype.copyWithin (target, start [ , end ] )
+
+  ...
+  5. Let relativeTarget be ToInteger(target).
+  6. ReturnIfAbrupt(relativeTarget).
+  ...
+features: [Symbol]
+---*/
+
+var s = Symbol(1);
+assert.throws(TypeError, function() {
+  [].copyWithin(s, 0);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/copyWithin/return-abrupt-from-target.js b/js/src/tests/test262/built-ins/Array/prototype/copyWithin/return-abrupt-from-target.js
new file mode 100644
index 0000000000..4eb0d794b0
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/copyWithin/return-abrupt-from-target.js
@@ -0,0 +1,25 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.copywithin
+description: >
+  Return abrupt from ToInteger(target).
+info: |
+  22.1.3.3 Array.prototype.copyWithin (target, start [ , end ] )
+
+  ...
+  5. Let relativeTarget be ToInteger(target).
+  6. ReturnIfAbrupt(relativeTarget).
+  ...
+---*/
+
+var o1 = {
+  valueOf: function() {
+    throw new Test262Error();
+  }
+};
+assert.throws(Test262Error, function() {
+  [].copyWithin(o1);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/copyWithin/return-abrupt-from-this-length-as-symbol.js b/js/src/tests/test262/built-ins/Array/prototype/copyWithin/return-abrupt-from-this-length-as-symbol.js
new file mode 100644
index 0000000000..51de5bcc74
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/copyWithin/return-abrupt-from-this-length-as-symbol.js
@@ -0,0 +1,26 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.copywithin
+description: >
+  Return abrupt from ToLength(Get(O, "length")) where length is a Symbol.
+info: |
+  22.1.3.3 Array.prototype.copyWithin (target, start [ , end ] )
+
+  1. Let O be ToObject(this value).
+  2. ReturnIfAbrupt(O).
+  3. Let len be ToLength(Get(O, "length")).
+  4. ReturnIfAbrupt(len).
+features: [Symbol]
+---*/
+
+var o = {};
+
+o.length = Symbol(1);
+
+// value argument is given to avoid false positives
+assert.throws(TypeError, function() {
+  [].copyWithin.call(o, 0, 0);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/copyWithin/return-abrupt-from-this-length.js b/js/src/tests/test262/built-ins/Array/prototype/copyWithin/return-abrupt-from-this-length.js
new file mode 100644
index 0000000000..99f789d9e4
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/copyWithin/return-abrupt-from-this-length.js
@@ -0,0 +1,38 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.copywithin
+description: >
+  Return abrupt from ToLength(Get(O, "length")).
+info: |
+  22.1.3.3 Array.prototype.copyWithin (target, start [ , end ] )
+
+  1. Let O be ToObject(this value).
+  2. ReturnIfAbrupt(O).
+  3. Let len be ToLength(Get(O, "length")).
+  4. ReturnIfAbrupt(len).
+---*/
+
+var o1 = {};
+
+Object.defineProperty(o1, 'length', {
+  get: function() {
+    throw new Test262Error();
+  }
+});
+assert.throws(Test262Error, function() {
+  [].copyWithin.call(o1);
+});
+
+var o2 = {
+  length: {
+    valueOf: function() {
+      throw new Test262Error();
+    }
+  }
+};
+assert.throws(Test262Error, function() {
+  [].copyWithin.call(o2);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/copyWithin/return-abrupt-from-this.js b/js/src/tests/test262/built-ins/Array/prototype/copyWithin/return-abrupt-from-this.js
new file mode 100644
index 0000000000..52b27cc214
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/copyWithin/return-abrupt-from-this.js
@@ -0,0 +1,22 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.copywithin
+description: >
+  Return abrupt from ToObject(this value).
+info: |
+  22.1.3.3 Array.prototype.copyWithin (target, start [ , end ] )
+
+  1. Let O be ToObject(this value).
+  2. ReturnIfAbrupt(O).
+---*/
+
+assert.throws(TypeError, function() {
+  Array.prototype.copyWithin.call(undefined, 0, 0);
+});
+
+assert.throws(TypeError, function() {
+  Array.prototype.copyWithin.call(null, 0, 0);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/copyWithin/return-this.js b/js/src/tests/test262/built-ins/Array/prototype/copyWithin/return-this.js
new file mode 100644
index 0000000000..6a60d8479f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/copyWithin/return-this.js
@@ -0,0 +1,24 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.copywithin
+description: >
+  Returns `this`.
+info: |
+  22.1.3.3 Array.prototype.copyWithin (target, start [ , end ] )
+
+  18. Return O.
+---*/
+
+var arr = [];
+var result = arr.copyWithin(0, 0);
+
+assert.sameValue(result, arr);
+
+var o = {
+  length: 0
+};
+result = Array.prototype.copyWithin.call(o, 0, 0);
+assert.sameValue(result, o);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/copyWithin/shell.js b/js/src/tests/test262/built-ins/Array/prototype/copyWithin/shell.js
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/js/src/tests/test262/built-ins/Array/prototype/copyWithin/undefined-end.js b/js/src/tests/test262/built-ins/Array/prototype/copyWithin/undefined-end.js
new file mode 100644
index 0000000000..ae2f4e3256
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/copyWithin/undefined-end.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.copywithin
+description: >
+  If `end` is undefined, set final position to `this.length`.
+info: |
+  22.1.3.3 Array.prototype.copyWithin (target, start [ , end ] )
+
+  ...
+  11. If end is undefined, let relativeEnd be len; else let relativeEnd be
+  ToInteger(end).
+  ...
+includes: [compareArray.js]
+---*/
+
+assert.compareArray(
+  [0, 1, 2, 3].copyWithin(0, 1, undefined), [1, 2, 3, 3],
+  '[0, 1, 2, 3].copyWithin(0, 1, undefined) must return [1, 2, 3, 3]'
+);
+
+assert.compareArray(
+  [0, 1, 2, 3].copyWithin(0, 1), [1, 2, 3, 3],
+  '[0, 1, 2, 3].copyWithin(0, 1) must return [1, 2, 3, 3]'
+);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/entries/browser.js b/js/src/tests/test262/built-ins/Array/prototype/entries/browser.js
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/js/src/tests/test262/built-ins/Array/prototype/entries/iteration-mutable.js b/js/src/tests/test262/built-ins/Array/prototype/entries/iteration-mutable.js
new file mode 100644
index 0000000000..b69fb5927a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/entries/iteration-mutable.js
@@ -0,0 +1,36 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.entries
+description: >
+  New items in the array are accessible via iteration until iterator is "done".
+info: |
+  The method should return a valid iterator with the context as the
+  IteratedObject. When an item is added to the array after the iterator is
+  created but before the iterator is "done" (as defined by 22.1.5.2.1) the
+  new item should be accessible via iteration.
+---*/
+
+var array = [];
+var iterator = array.entries();
+var result;
+
+array.push('a');
+
+result = iterator.next();
+assert.sameValue(result.done, false, 'First result `done` flag');
+assert.sameValue(result.value[0], 0, 'First result `value` (array key)');
+assert.sameValue(result.value[1], 'a', 'First result `value (array value)');
+assert.sameValue(result.value.length, 2, 'First result `value` (length)');
+
+result = iterator.next();
+assert.sameValue(result.done, true, 'Exhausted result `done` flag');
+assert.sameValue(result.value, undefined, 'Exhausted result `value`');
+
+array.push('b');
+
+result = iterator.next();
+assert.sameValue(result.done, true, 'Exhausted result `done` flag (after push)');
+assert.sameValue(result.value, undefined, 'Exhausted result `value` (after push)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/entries/iteration.js b/js/src/tests/test262/built-ins/Array/prototype/entries/iteration.js
new file mode 100644
index 0000000000..ce725c24db
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/entries/iteration.js
@@ -0,0 +1,41 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.entries
+description: >
+  The return is a valid iterator with the array's numeric properties.
+info: |
+  22.1.3.4 Array.prototype.entries ( )
+
+  1. Let O be ToObject(this value).
+  2. ReturnIfAbrupt(O).
+  3. Return CreateArrayIterator(O, "key+value").
+---*/
+
+var array = ['a', 'b', 'c'];
+var iterator = array.entries();
+var result;
+
+result = iterator.next();
+assert.sameValue(result.done, false, 'First result `done` flag');
+assert.sameValue(result.value[0], 0, 'First result `value` (array key)');
+assert.sameValue(result.value[1], 'a', 'First result `value` (array value)');
+assert.sameValue(result.value.length, 2, 'First result `value` (length)');
+
+result = iterator.next();
+assert.sameValue(result.done, false, 'Second result `done` flag');
+assert.sameValue(result.value[0], 1, 'Second result `value` (array key)');
+assert.sameValue(result.value[1], 'b', 'Second result `value` (array value)');
+assert.sameValue(result.value.length, 2, 'Second result `value` (length)');
+
+result = iterator.next();
+assert.sameValue(result.done, false, 'Third result `done` flag');
+assert.sameValue(result.value[0], 2, 'Third result `value` (array key)');
+assert.sameValue(result.value[1], 'c', 'Third result `value` (array value)');
+assert.sameValue(result.value.length, 2, 'Third result `value` (length)');
+
+result = iterator.next();
+assert.sameValue(result.done, true, 'Exhausted result `done` flag');
+assert.sameValue(result.value, undefined, 'Exhausted result `value`');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/entries/length.js b/js/src/tests/test262/built-ins/Array/prototype/entries/length.js
new file mode 100644
index 0000000000..28f3093b6b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/entries/length.js
@@ -0,0 +1,24 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.entries
+description: >
+  Array.prototype.entries.length value and descriptor.
+info: |
+  22.1.3.4 Array.prototype.entries ( )
+
+  17 ECMAScript Standard Built-in Objects
+
+includes: [propertyHelper.js]
+---*/
+
+assert.sameValue(
+  Array.prototype.entries.length, 0,
+  'The value of `Array.prototype.entries.length` is `0`'
+);
+
+verifyNotEnumerable(Array.prototype.entries, 'length');
+verifyNotWritable(Array.prototype.entries, 'length');
+verifyConfigurable(Array.prototype.entries, 'length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/entries/name.js b/js/src/tests/test262/built-ins/Array/prototype/entries/name.js
new file mode 100644
index 0000000000..db9cd7a5d2
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/entries/name.js
@@ -0,0 +1,24 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.entries
+description: >
+  Array.prototype.entries.name value and descriptor.
+info: |
+  22.1.3.4 Array.prototype.entries ( )
+
+  17 ECMAScript Standard Built-in Objects
+
+includes: [propertyHelper.js]
+---*/
+
+assert.sameValue(
+  Array.prototype.entries.name, 'entries',
+  'The value of `Array.prototype.entries.name` is `"entries"`'
+);
+
+verifyNotEnumerable(Array.prototype.entries, 'name');
+verifyNotWritable(Array.prototype.entries, 'name');
+verifyConfigurable(Array.prototype.entries, 'name');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/entries/not-a-constructor.js b/js/src/tests/test262/built-ins/Array/prototype/entries/not-a-constructor.js
new file mode 100644
index 0000000000..7629f5b507
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/entries/not-a-constructor.js
@@ -0,0 +1,35 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Array.prototype.entries does not implement [[Construct]], is not new-able
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+
+  sec-evaluatenew
+
+  ...
+  7. If IsConstructor(constructor) is false, throw a TypeError exception.
+  ...
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Array.prototype.entries),
+  false,
+  'isConstructor(Array.prototype.entries) must return false'
+);
+
+assert.throws(TypeError, () => {
+  new Array.prototype.entries();
+}, '`new Array.prototype.entries()` throws TypeError');
+
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/entries/prop-desc.js b/js/src/tests/test262/built-ins/Array/prototype/entries/prop-desc.js
new file mode 100644
index 0000000000..c04251a9a9
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/entries/prop-desc.js
@@ -0,0 +1,24 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.entries
+description: >
+  Property type and descriptor.
+info: |
+  22.1.3.4 Array.prototype.entries ( )
+
+  17 ECMAScript Standard Built-in Objects
+includes: [propertyHelper.js]
+---*/
+
+assert.sameValue(
+  typeof Array.prototype.entries,
+  'function',
+  '`typeof Array.prototype.entries` is `function`'
+);
+
+verifyNotEnumerable(Array.prototype, 'entries');
+verifyWritable(Array.prototype, 'entries');
+verifyConfigurable(Array.prototype, 'entries');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/entries/return-abrupt-from-this.js b/js/src/tests/test262/built-ins/Array/prototype/entries/return-abrupt-from-this.js
new file mode 100644
index 0000000000..91a57bf125
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/entries/return-abrupt-from-this.js
@@ -0,0 +1,22 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.entries
+description: >
+  Return abrupt from ToObject(this value).
+info: |
+  22.1.3.4 Array.prototype.entries ( )
+
+  1. Let O be ToObject(this value).
+  2. ReturnIfAbrupt(O).
+---*/
+
+assert.throws(TypeError, function() {
+  Array.prototype.entries.call(undefined);
+});
+
+assert.throws(TypeError, function() {
+  Array.prototype.entries.call(null);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/entries/returns-iterator-from-object.js b/js/src/tests/test262/built-ins/Array/prototype/entries/returns-iterator-from-object.js
new file mode 100644
index 0000000000..2a4ba60806
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/entries/returns-iterator-from-object.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.entries
+description: >
+  Creates an iterator from a custom object.
+info: |
+  22.1.3.4 Array.prototype.entries ( )
+
+  1. Let O be ToObject(this value).
+  2. ReturnIfAbrupt(O).
+  3. Return CreateArrayIterator(O, "key+value").
+features: [Symbol.iterator]
+---*/
+
+var obj = {
+  length: 2
+};
+var iter = Array.prototype.entries.call(obj);
+var ArrayIteratorProto = Object.getPrototypeOf([][Symbol.iterator]());
+
+assert.sameValue(
+  Object.getPrototypeOf(iter), ArrayIteratorProto,
+  'The prototype of [].entries() is %ArrayIteratorPrototype%'
+);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/entries/returns-iterator.js b/js/src/tests/test262/built-ins/Array/prototype/entries/returns-iterator.js
new file mode 100644
index 0000000000..f07261270e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/entries/returns-iterator.js
@@ -0,0 +1,32 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.entries
+description: >
+  The method should return an Iterator instance.
+info: |
+  22.1.3.4 Array.prototype.entries ( )
+
+  1. Let O be ToObject(this value).
+  2. ReturnIfAbrupt(O).
+  3. Return CreateArrayIterator(O, "key+value").
+
+  22.1.5.1 CreateArrayIterator Abstract Operation
+
+  ...
+  2. Let iterator be ObjectCreate(%ArrayIteratorPrototype%, «‍[[IteratedObject]],
+  [[ArrayIteratorNextIndex]], [[ArrayIterationKind]]»).
+  ...
+  6. Return iterator.
+features: [Symbol.iterator]
+---*/
+
+var ArrayIteratorProto = Object.getPrototypeOf([][Symbol.iterator]());
+var iter = [].entries();
+
+assert.sameValue(
+  Object.getPrototypeOf(iter), ArrayIteratorProto,
+  'The prototype of [].entries() is %ArrayIteratorPrototype%'
+);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/entries/shell.js b/js/src/tests/test262/built-ins/Array/prototype/entries/shell.js
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-0-1.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-0-1.js
new file mode 100644
index 0000000000..5748303499
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-0-1.js
@@ -0,0 +1,13 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: Array.prototype.every must exist as a function
+---*/
+
+var f = Array.prototype.every;
+
+assert.sameValue(typeof(f), "function", 'typeof(f)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-1-1.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-1-1.js
new file mode 100644
index 0000000000..28ea6d417b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-1-1.js
@@ -0,0 +1,14 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: Array.prototype.every applied to undefined throws a TypeError
+---*/
+
+
+assert.throws(TypeError, function() {
+  Array.prototype.every.call(undefined); // TypeError is thrown if value is undefined
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-1-10.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-1-10.js
new file mode 100644
index 0000000000..84d73fedf7
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-1-10.js
@@ -0,0 +1,18 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: Array.prototype.every applied to the Math object
+---*/
+
+function callbackfn(val, idx, obj) {
+  return ('[object Math]' !== Object.prototype.toString.call(obj));
+}
+
+Math.length = 1;
+Math[0] = 1;
+
+assert.sameValue(Array.prototype.every.call(Math, callbackfn), false, 'Array.prototype.every.call(Math, callbackfn)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-1-11.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-1-11.js
new file mode 100644
index 0000000000..07413cbbab
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-1-11.js
@@ -0,0 +1,19 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: Array.prototype.every applied to Date object
+---*/
+
+function callbackfn(val, idx, obj) {
+  return !(obj instanceof Date);
+}
+
+var obj = new Date();
+obj.length = 1;
+obj[0] = 1;
+
+assert.sameValue(Array.prototype.every.call(obj, callbackfn), false, 'Array.prototype.every.call(obj, callbackfn)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-1-12.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-1-12.js
new file mode 100644
index 0000000000..725940e814
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-1-12.js
@@ -0,0 +1,19 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: Array.prototype.every applied to RegExp object
+---*/
+
+function callbackfn(val, idx, obj) {
+  return !(obj instanceof RegExp);
+}
+
+var obj = new RegExp();
+obj.length = 1;
+obj[0] = 1;
+
+assert.sameValue(Array.prototype.every.call(obj, callbackfn), false, 'Array.prototype.every.call(obj, callbackfn)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-1-13.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-1-13.js
new file mode 100644
index 0000000000..b4a4ee5a5b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-1-13.js
@@ -0,0 +1,18 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: Array.prototype.every applied to the JSON object
+---*/
+
+function callbackfn(val, idx, obj) {
+  return ('[object JSON]' !== Object.prototype.toString.call(obj));
+}
+
+JSON.length = 1;
+JSON[0] = 1;
+
+assert.sameValue(Array.prototype.every.call(JSON, callbackfn), false, 'Array.prototype.every.call(JSON, callbackfn)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-1-14.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-1-14.js
new file mode 100644
index 0000000000..89ff1df9e8
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-1-14.js
@@ -0,0 +1,19 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: Array.prototype.every applied to Error object
+---*/
+
+function callbackfn(val, idx, obj) {
+  return !(obj instanceof Error);
+}
+
+var obj = new Error();
+obj.length = 1;
+obj[0] = 1;
+
+assert.sameValue(Array.prototype.every.call(obj, callbackfn), false, 'Array.prototype.every.call(obj, callbackfn)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-1-15.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-1-15.js
new file mode 100644
index 0000000000..a6ffd11526
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-1-15.js
@@ -0,0 +1,19 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: Array.prototype.every applied to the Arguments object
+---*/
+
+function callbackfn(val, idx, obj) {
+  return ('[object Arguments]' !== Object.prototype.toString.call(obj));
+}
+
+var obj = (function fun() {
+  return arguments;
+}("a", "b"));
+
+assert.sameValue(Array.prototype.every.call(obj, callbackfn), false, 'Array.prototype.every.call(obj, callbackfn)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-1-2.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-1-2.js
new file mode 100644
index 0000000000..d3ca2b6104
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-1-2.js
@@ -0,0 +1,14 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: Array.prototype.every applied to null throws a TypeError
+---*/
+
+
+assert.throws(TypeError, function() {
+  Array.prototype.every.call(null); // TypeError is thrown if value is null
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-1-3.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-1-3.js
new file mode 100644
index 0000000000..53710c52a6
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-1-3.js
@@ -0,0 +1,22 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: Array.prototype.every applied to boolean primitive
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return obj instanceof Boolean;
+}
+
+Boolean.prototype[0] = 1;
+Boolean.prototype.length = 1;
+
+assert(Array.prototype.every.call(false, callbackfn), 'Array.prototype.every.call(false, callbackfn) !== true');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-1-4.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-1-4.js
new file mode 100644
index 0000000000..502fddcc8b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-1-4.js
@@ -0,0 +1,24 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: Array.prototype.every applied to Boolean object
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return obj instanceof Boolean;
+}
+
+var obj = new Boolean(true);
+obj.length = 2;
+obj[0] = 11;
+obj[1] = 12;
+
+assert(Array.prototype.every.call(obj, callbackfn), 'Array.prototype.every.call(obj, callbackfn) !== true');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-1-5.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-1-5.js
new file mode 100644
index 0000000000..7f705289f6
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-1-5.js
@@ -0,0 +1,22 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: Array.prototype.every applied to number primitive
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return obj instanceof Number;
+}
+
+Number.prototype[0] = 1;
+Number.prototype.length = 1;
+
+assert(Array.prototype.every.call(2.5, callbackfn), 'Array.prototype.every.call(2.5, callbackfn) !== true');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-1-6.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-1-6.js
new file mode 100644
index 0000000000..1900feccdb
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-1-6.js
@@ -0,0 +1,24 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: Array.prototype.every applied to Number object
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return obj instanceof Number;
+}
+
+var obj = new Number(-128);
+obj.length = 2;
+obj[0] = 11;
+obj[1] = 12;
+
+assert(Array.prototype.every.call(obj, callbackfn), 'Array.prototype.every.call(obj, callbackfn) !== true');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-1-7.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-1-7.js
new file mode 100644
index 0000000000..11a157862b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-1-7.js
@@ -0,0 +1,15 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: Array.prototype.every applied to string primitive
+---*/
+
+function callbackfn(val, idx, obj) {
+  return !(obj instanceof String);
+}
+
+assert.sameValue(Array.prototype.every.call("hello\nworld\\!", callbackfn), false, 'Array.prototype.every.call("hello\nworld\\!", callbackfn)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-1-8.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-1-8.js
new file mode 100644
index 0000000000..8c91c089e5
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-1-8.js
@@ -0,0 +1,17 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: Array.prototype.every applied to String object
+---*/
+
+function callbackfn(val, idx, obj) {
+  return !(obj instanceof String);
+}
+
+var obj = new String("hello\nworld\\!");
+
+assert.sameValue(Array.prototype.every.call(obj, callbackfn), false, 'Array.prototype.every.call(obj, callbackfn)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-1-9.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-1-9.js
new file mode 100644
index 0000000000..b6f878e640
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-1-9.js
@@ -0,0 +1,21 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: Array.prototype.every applied to Function object
+---*/
+
+function callbackfn(val, idx, obj) {
+  return !(obj instanceof Function);
+}
+
+var obj = function(a, b) {
+  return a + b;
+};
+obj[0] = 11;
+obj[1] = 9;
+
+assert.sameValue(Array.prototype.every.call(obj, callbackfn), false, 'Array.prototype.every.call(obj, callbackfn)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-2-1.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-2-1.js
new file mode 100644
index 0000000000..bb4777ce82
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-2-1.js
@@ -0,0 +1,29 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every applied to Array-like object, 'length' is an
+    own data property
+---*/
+
+function callbackfn1(val, idx, obj) {
+  return val > 10;
+}
+
+function callbackfn2(val, idx, obj) {
+  return val > 11;
+}
+
+var obj = {
+  0: 12,
+  1: 11,
+  2: 9,
+  length: 2
+};
+
+assert(Array.prototype.every.call(obj, callbackfn1), 'Array.prototype.every.call(obj, callbackfn1) !== true');
+assert.sameValue(Array.prototype.every.call(obj, callbackfn2), false, 'Array.prototype.every.call(obj, callbackfn2)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-2-10.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-2-10.js
new file mode 100644
index 0000000000..1fb57d459f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-2-10.js
@@ -0,0 +1,39 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every applied to Array-like object, 'length' is an
+    inherited accessor property
+---*/
+
+function callbackfn1(val, idx, obj) {
+  return val > 10;
+}
+
+function callbackfn2(val, idx, obj) {
+  return val > 11;
+}
+
+var proto = {};
+
+Object.defineProperty(proto, "length", {
+  get: function() {
+    return 2;
+  },
+  configurable: true
+});
+
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+child[0] = 12;
+child[1] = 11;
+child[2] = 9;
+
+assert(Array.prototype.every.call(child, callbackfn1), 'Array.prototype.every.call(child, callbackfn1) !== true');
+assert.sameValue(Array.prototype.every.call(child, callbackfn2), false, 'Array.prototype.every.call(child, callbackfn2)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-2-11.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-2-11.js
new file mode 100644
index 0000000000..0c4a6515d6
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-2-11.js
@@ -0,0 +1,30 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every applied to Array-like object, 'length' is an
+    own accessor property without a get function
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return val > 10;
+}
+
+var obj = {
+  0: 9,
+  1: 8
+};
+Object.defineProperty(obj, "length", {
+  set: function() {},
+  configurable: true
+});
+
+assert(Array.prototype.every.call(obj, callbackfn), 'Array.prototype.every.call(obj, callbackfn) !== true');
+assert.sameValue(accessed, false, 'accessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-2-12.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-2-12.js
new file mode 100644
index 0000000000..06ac2af411
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-2-12.js
@@ -0,0 +1,37 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every - 'length' is own accessor property without
+    a get function that overrides an inherited accessor property
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return val > 10;
+}
+
+Object.defineProperty(Object.prototype, "length", {
+  get: function() {
+    return 2;
+  },
+  configurable: true
+});
+
+var obj = {
+  0: 9,
+  1: 8
+};
+Object.defineProperty(obj, "length", {
+  set: function() {},
+  configurable: true
+});
+
+assert(Array.prototype.every.call(obj, callbackfn), 'Array.prototype.every.call(obj, callbackfn) !== true');
+assert.sameValue(accessed, false, 'accessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-2-13.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-2-13.js
new file mode 100644
index 0000000000..3dfed8d28c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-2-13.js
@@ -0,0 +1,34 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every applied to the Array-like object that
+    'length' is inherited accessor property without a get function
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return val > 10;
+}
+
+var proto = {};
+Object.defineProperty(proto, "length", {
+  set: function() {},
+  configurable: true
+});
+
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+child[0] = 9;
+child[1] = 8;
+
+assert(Array.prototype.every.call(child, callbackfn), 'Array.prototype.every.call(child, callbackfn) !== true');
+assert.sameValue(accessed, false, 'accessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-2-14.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-2-14.js
new file mode 100644
index 0000000000..5ba3993d15
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-2-14.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every applied to the Array-like object that
+    'length' property doesn't exist
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return val > 10;
+}
+
+var obj = {
+  0: 11,
+  1: 12
+};
+
+assert(Array.prototype.every.call(obj, callbackfn), 'Array.prototype.every.call(obj, callbackfn) !== true');
+assert.sameValue(accessed, false, 'accessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-2-17.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-2-17.js
new file mode 100644
index 0000000000..d6d41c06ed
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-2-17.js
@@ -0,0 +1,27 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every applied to the Arguments object, which
+    implements its own property get method
+---*/
+
+function callbackfn1(val, idx, obj) {
+  return val > 10;
+}
+
+function callbackfn2(val, idx, obj) {
+  return val > 11;
+}
+
+var func = function(a, b) {
+  arguments[2] = 9;
+  return Array.prototype.every.call(arguments, callbackfn1) &&
+    !Array.prototype.every.call(arguments, callbackfn2);
+};
+
+assert(func(12, 11), 'func(12, 11) !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-2-18.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-2-18.js
new file mode 100644
index 0000000000..ea410a0e7e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-2-18.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every applied to String object, which implements
+    its own property get method
+---*/
+
+function callbackfn1(val, idx, obj) {
+  return parseInt(val, 10) > 1;
+}
+
+function callbackfn2(val, idx, obj) {
+  return parseInt(val, 10) > 2;
+}
+
+var str = new String("432");
+
+String.prototype[3] = "1";
+
+assert(Array.prototype.every.call(str, callbackfn1), 'Array.prototype.every.call(str, callbackfn1) !== true');
+assert.sameValue(Array.prototype.every.call(str, callbackfn2), false, 'Array.prototype.every.call(str, callbackfn2)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-2-19.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-2-19.js
new file mode 100644
index 0000000000..9b4e28396c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-2-19.js
@@ -0,0 +1,29 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every applied to Function object, which implements
+    its own property get method
+---*/
+
+function callbackfn1(val, idx, obj) {
+  return val > 10;
+}
+
+function callbackfn2(val, idx, obj) {
+  return val > 11;
+}
+
+var fun = function(a, b) {
+  return a + b;
+};
+fun[0] = 12;
+fun[1] = 11;
+fun[2] = 9;
+
+assert(Array.prototype.every.call(fun, callbackfn1), 'Array.prototype.every.call(fun, callbackfn1) !== true');
+assert.sameValue(Array.prototype.every.call(fun, callbackfn2), false, 'Array.prototype.every.call(fun, callbackfn2)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-2-2.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-2-2.js
new file mode 100644
index 0000000000..66517da434
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-2-2.js
@@ -0,0 +1,22 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: Array.prototype.every - 'length' is own data property on an Array
+---*/
+
+function callbackfn1(val, idx, obj) {
+  return val > 10;
+}
+
+function callbackfn2(val, idx, obj) {
+  return val > 11;
+}
+
+Array.prototype[2] = 9;
+
+assert([12, 11].every(callbackfn1), '[12, 11].every(callbackfn1) !== true');
+assert.sameValue([12, 11].every(callbackfn2), false, '[12, 11].every(callbackfn2)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-2-3.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-2-3.js
new file mode 100644
index 0000000000..34edd6487f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-2-3.js
@@ -0,0 +1,35 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every applied to Array-like object, 'length' is an
+    own data property that overrides an inherited data property
+---*/
+
+function callbackfn1(val, idx, obj) {
+  return val > 10;
+}
+
+function callbackfn2(val, idx, obj) {
+  return val > 11;
+}
+
+var proto = {
+  length: 3
+};
+
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+child.length = 2;
+child[0] = 12;
+child[1] = 11;
+child[2] = 9;
+
+assert(Array.prototype.every.call(child, callbackfn1), 'Array.prototype.every.call(child, callbackfn1) !== true');
+assert.sameValue(Array.prototype.every.call(child, callbackfn2), false, 'Array.prototype.every.call(child, callbackfn2)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-2-4.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-2-4.js
new file mode 100644
index 0000000000..401816a1dd
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-2-4.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every - 'length' is own data property that
+    overrides an inherited data property on an Array
+---*/
+
+var arrProtoLen = 0;
+
+function callbackfn1(val, idx, obj) {
+  return val > 10;
+}
+
+function callbackfn2(val, idx, obj) {
+  return val > 11;
+}
+
+arrProtoLen = Array.prototype.length;
+Array.prototype.length = 0;
+Array.prototype[2] = 9;
+
+assert([12, 11].every(callbackfn1), '[12, 11].every(callbackfn1) !== true');
+assert.sameValue([12, 11].every(callbackfn2), false, '[12, 11].every(callbackfn2)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-2-5.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-2-5.js
new file mode 100644
index 0000000000..71a5cf7422
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-2-5.js
@@ -0,0 +1,44 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every applied to Array-like object, 'length' is an
+    own data property that overrides an inherited accessor property
+---*/
+
+function callbackfn1(val, idx, obj) {
+  return val > 10;
+}
+
+function callbackfn2(val, idx, obj) {
+  return val > 11;
+}
+
+var proto = {};
+
+Object.defineProperty(proto, "length", {
+  get: function() {
+    return 3;
+  },
+  configurable: true
+});
+
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+child[0] = 12;
+child[1] = 11;
+child[2] = 9;
+
+Object.defineProperty(child, "length", {
+  value: 2,
+  configurable: true
+});
+
+assert(Array.prototype.every.call(child, callbackfn1), 'Array.prototype.every.call(child, callbackfn1) !== true');
+assert.sameValue(Array.prototype.every.call(child, callbackfn2), false, 'Array.prototype.every.call(child, callbackfn2)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-2-6.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-2-6.js
new file mode 100644
index 0000000000..afbe1bc864
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-2-6.js
@@ -0,0 +1,34 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every applied to Array-like object, 'length' is an
+    inherited data property
+---*/
+
+function callbackfn1(val, idx, obj) {
+  return val > 10;
+}
+
+function callbackfn2(val, idx, obj) {
+  return val > 11;
+}
+
+var proto = {
+  length: 2
+};
+
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+child[0] = 12;
+child[1] = 11;
+child[2] = 9;
+
+assert(Array.prototype.every.call(child, callbackfn1), 'Array.prototype.every.call(child, callbackfn1) !== true');
+assert.sameValue(Array.prototype.every.call(child, callbackfn2), false, 'Array.prototype.every.call(child, callbackfn2)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-2-7.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-2-7.js
new file mode 100644
index 0000000000..63646b52c6
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-2-7.js
@@ -0,0 +1,35 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every applied to Array-like object, 'length' is an
+    own accessor property
+---*/
+
+function callbackfn1(val, idx, obj) {
+  return val > 10;
+}
+
+function callbackfn2(val, idx, obj) {
+  return val > 11;
+}
+
+var obj = {};
+
+Object.defineProperty(obj, "length", {
+  get: function() {
+    return 2;
+  },
+  configurable: true
+});
+
+obj[0] = 12;
+obj[1] = 11;
+obj[2] = 9;
+
+assert(Array.prototype.every.call(obj, callbackfn1), 'Array.prototype.every.call(obj, callbackfn1) !== true');
+assert.sameValue(Array.prototype.every.call(obj, callbackfn2), false, 'Array.prototype.every.call(obj, callbackfn2)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-2-8.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-2-8.js
new file mode 100644
index 0000000000..a84db41a55
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-2-8.js
@@ -0,0 +1,42 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every applied to Array-like object, 'length' is an
+    own accessor property that overrides an inherited data property
+---*/
+
+function callbackfn1(val, idx, obj) {
+  return val > 10;
+}
+
+function callbackfn2(val, idx, obj) {
+  return val > 11;
+}
+
+var proto = {
+  length: 3
+};
+
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+
+Object.defineProperty(child, "length", {
+  get: function() {
+    return 2;
+  },
+  configurable: true
+});
+
+child[0] = 12;
+child[1] = 11;
+child[2] = 9;
+
+assert(Array.prototype.every.call(child, callbackfn1), 'Array.prototype.every.call(child, callbackfn1) !== true');
+assert.sameValue(Array.prototype.every.call(child, callbackfn2), false, 'Array.prototype.every.call(child, callbackfn2)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-2-9.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-2-9.js
new file mode 100644
index 0000000000..294a8ca36c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-2-9.js
@@ -0,0 +1,47 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every applied to Array-like object, 'length' is an
+    own accessor property that overrides an inherited accessor property
+---*/
+
+function callbackfn1(val, idx, obj) {
+  return val > 10;
+}
+
+function callbackfn2(val, idx, obj) {
+  return val > 11;
+}
+
+var proto = {};
+
+Object.defineProperty(proto, "length", {
+  get: function() {
+    return 3;
+  },
+  configurable: true
+});
+
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+
+Object.defineProperty(child, "length", {
+  get: function() {
+    return 2;
+  },
+  configurable: true
+});
+
+child[0] = 12;
+child[1] = 11;
+child[2] = 9;
+
+assert(Array.prototype.every.call(child, callbackfn1), 'Array.prototype.every.call(child, callbackfn1) !== true');
+assert.sameValue(Array.prototype.every.call(child, callbackfn2), false, 'Array.prototype.every.call(child, callbackfn2)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-3-1.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-3-1.js
new file mode 100644
index 0000000000..2bb0e7335c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-3-1.js
@@ -0,0 +1,24 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: Array.prototype.every - value of 'length' is undefined
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return val > 10;
+}
+
+var obj = {
+  0: 9,
+  length: undefined
+};
+
+assert(Array.prototype.every.call(obj, callbackfn), 'Array.prototype.every.call(obj, callbackfn) !== true');
+assert.sameValue(accessed, false, 'accessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-3-10.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-3-10.js
new file mode 100644
index 0000000000..eb41b2930b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-3-10.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every - value of 'length' is a number (value is
+    NaN)
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return val > 10;
+}
+
+var obj = {
+  0: 9,
+  length: NaN
+};
+
+assert(Array.prototype.every.call(obj, callbackfn), 'Array.prototype.every.call(obj, callbackfn) !== true');
+assert.sameValue(accessed, false, 'accessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-3-11.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-3-11.js
new file mode 100644
index 0000000000..274cecba8e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-3-11.js
@@ -0,0 +1,29 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every - 'length' is a string containing a positive
+    number
+---*/
+
+function callbackfn1(val, idx, obj) {
+  return val > 10;
+}
+
+function callbackfn2(val, idx, obj) {
+  return val > 11;
+}
+
+var obj = {
+  0: 12,
+  1: 11,
+  2: 9,
+  length: "2"
+};
+
+assert(Array.prototype.every.call(obj, callbackfn1), 'Array.prototype.every.call(obj, callbackfn1) !== true');
+assert.sameValue(Array.prototype.every.call(obj, callbackfn2), false, 'Array.prototype.every.call(obj, callbackfn2)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-3-12.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-3-12.js
new file mode 100644
index 0000000000..574d2775d0
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-3-12.js
@@ -0,0 +1,29 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every - 'length' is a string containing a negative
+    number
+---*/
+
+function callbackfn1(val, idx, obj) {
+  return val > 10;
+}
+
+function callbackfn2(val, idx, obj) {
+  return val > 11;
+}
+
+var obj = {
+  0: 11,
+  1: 12,
+  2: 9,
+  length: "-4294967294"
+};
+
+assert(Array.prototype.every.call(obj, callbackfn1), 'Array.prototype.every.call(obj, callbackfn1) !== true');
+assert(Array.prototype.every.call(obj, callbackfn2), 'Array.prototype.every.call(obj, callbackfn2) !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-3-13.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-3-13.js
new file mode 100644
index 0000000000..67629eea18
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-3-13.js
@@ -0,0 +1,29 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every - 'length' is a string containing a decimal
+    number
+---*/
+
+function callbackfn1(val, idx, obj) {
+  return val > 10;
+}
+
+function callbackfn2(val, idx, obj) {
+  return val > 11;
+}
+
+var obj = {
+  0: 12,
+  1: 11,
+  2: 9,
+  length: "2.5"
+};
+
+assert(Array.prototype.every.call(obj, callbackfn1), 'Array.prototype.every.call(obj, callbackfn1) !== true');
+assert.sameValue(Array.prototype.every.call(obj, callbackfn2), false, 'Array.prototype.every.call(obj, callbackfn2)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-3-14.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-3-14.js
new file mode 100644
index 0000000000..3bb80e60f6
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-3-14.js
@@ -0,0 +1,34 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: Array.prototype.every - 'length' is a string containing +/-Infinity
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return val > 10;
+}
+
+var objOne = {
+  0: 9,
+  length: "Infinity"
+};
+var objTwo = {
+  0: 9,
+  length: "+Infinity"
+};
+var objThree = {
+  0: 9,
+  length: "-Infinity"
+};
+
+assert.sameValue(Array.prototype.every.call(objOne, callbackfn), false, 'Array.prototype.every.call(objOne, callbackfn)');
+assert.sameValue(Array.prototype.every.call(objTwo, callbackfn), false, 'Array.prototype.every.call(objTwo, callbackfn)');
+assert(Array.prototype.every.call(objThree, callbackfn), 'Array.prototype.every.call(objThree, callbackfn) !== true');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-3-15.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-3-15.js
new file mode 100644
index 0000000000..44c8bd416a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-3-15.js
@@ -0,0 +1,29 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every - 'length' is a string containing an
+    exponential number
+---*/
+
+function callbackfn1(val, idx, obj) {
+  return val > 10;
+}
+
+function callbackfn2(val, idx, obj) {
+  return val > 11;
+}
+
+var obj = {
+  0: 12,
+  1: 11,
+  2: 9,
+  length: "2E0"
+};
+
+assert(Array.prototype.every.call(obj, callbackfn1), 'Array.prototype.every.call(obj, callbackfn1) !== true');
+assert.sameValue(Array.prototype.every.call(obj, callbackfn2), false, 'Array.prototype.every.call(obj, callbackfn2)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-3-16.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-3-16.js
new file mode 100644
index 0000000000..e89b05d06c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-3-16.js
@@ -0,0 +1,29 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every - 'length' is a string containing a hex
+    number
+---*/
+
+function callbackfn1(val, idx, obj) {
+  return val > 10;
+}
+
+function callbackfn2(val, idx, obj) {
+  return val > 11;
+}
+
+var obj = {
+  0: 12,
+  1: 11,
+  2: 9,
+  length: "0x0002"
+};
+
+assert(Array.prototype.every.call(obj, callbackfn1), 'Array.prototype.every.call(obj, callbackfn1) !== true');
+assert.sameValue(Array.prototype.every.call(obj, callbackfn2), false, 'Array.prototype.every.call(obj, callbackfn2)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-3-17.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-3-17.js
new file mode 100644
index 0000000000..96c78cd4ec
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-3-17.js
@@ -0,0 +1,29 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every - 'length' is a string containing a number
+    with leading zeros
+---*/
+
+function callbackfn1(val, idx, obj) {
+  return val > 10;
+}
+
+function callbackfn2(val, idx, obj) {
+  return val > 11;
+}
+
+var obj = {
+  0: 12,
+  1: 11,
+  2: 9,
+  length: "0002.00"
+};
+
+assert(Array.prototype.every.call(obj, callbackfn1), 'Array.prototype.every.call(obj, callbackfn1) !== true');
+assert.sameValue(Array.prototype.every.call(obj, callbackfn2), false, 'Array.prototype.every.call(obj, callbackfn2)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-3-18.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-3-18.js
new file mode 100644
index 0000000000..06f0631b71
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-3-18.js
@@ -0,0 +1,27 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every - value of 'length' is a string that can't
+    convert to a number
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return val > 10;
+}
+
+var obj = {
+  0: 9,
+  1: 8,
+  length: "two"
+};
+
+assert(Array.prototype.every.call(obj, callbackfn), 'Array.prototype.every.call(obj, callbackfn) !== true');
+assert.sameValue(accessed, false, 'accessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-3-19.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-3-19.js
new file mode 100644
index 0000000000..f6d9887381
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-3-19.js
@@ -0,0 +1,43 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every - value of 'length' is an Object which has
+    an own toString method
+---*/
+
+function callbackfn1(val, idx, obj) {
+  return val > 10;
+}
+
+function callbackfn2(val, idx, obj) {
+  return val > 11;
+}
+
+var toStringAccessed = false;
+var obj = {
+  0: 12,
+  1: 11,
+  2: 9,
+
+  length: {
+    toString: function() {
+      toStringAccessed = true;
+      return '2';
+    }
+  }
+};
+
+// objects inherit the default valueOf() method from Object
+// that simply returns itself. Since the default valueOf() method
+// does not return a primitive value, ES next tries to convert the object
+// to a number by calling its toString() method and converting the
+// resulting string to a number.
+
+assert(Array.prototype.every.call(obj, callbackfn1), 'Array.prototype.every.call(obj, callbackfn1) !== true');
+assert.sameValue(Array.prototype.every.call(obj, callbackfn2), false, 'Array.prototype.every.call(obj, callbackfn2)');
+assert(toStringAccessed, 'toStringAccessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-3-2.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-3-2.js
new file mode 100644
index 0000000000..cb811b2e4c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-3-2.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every on an Array-like object if 'length' is 1
+    (length overridden to true(type conversion))
+---*/
+
+function callbackfn1(val, idx, obj) {
+  return val > 10;
+}
+
+function callbackfn2(val, idx, obj) {
+  return val > 11;
+}
+
+var obj = {
+  0: 11,
+  1: 9,
+  length: true
+};
+
+assert(Array.prototype.every.call(obj, callbackfn1), 'Array.prototype.every.call(obj, callbackfn1) !== true');
+assert.sameValue(Array.prototype.every.call(obj, callbackfn2), false, 'Array.prototype.every.call(obj, callbackfn2)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-3-20.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-3-20.js
new file mode 100644
index 0000000000..acd8b90006
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-3-20.js
@@ -0,0 +1,37 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every - value of 'length' is an Object which has
+    an own valueOf method
+---*/
+
+function callbackfn1(val, idx, obj) {
+  return val > 10;
+}
+
+function callbackfn2(val, idx, obj) {
+  return val > 11;
+}
+
+var valueOfAccessed = false;
+
+var obj = {
+  0: 12,
+  1: 11,
+  2: 9,
+  length: {
+    valueOf: function() {
+      valueOfAccessed = true;
+      return 2;
+    }
+  }
+};
+
+assert(Array.prototype.every.call(obj, callbackfn1), 'Array.prototype.every.call(obj, callbackfn1) !== true');
+assert.sameValue(Array.prototype.every.call(obj, callbackfn2), false, 'Array.prototype.every.call(obj, callbackfn2)');
+assert(valueOfAccessed, 'valueOfAccessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-3-21.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-3-21.js
new file mode 100644
index 0000000000..237423b379
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-3-21.js
@@ -0,0 +1,44 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every - 'length' is an object that has an own
+    valueOf method that returns an object and toString method that
+    returns a string
+---*/
+
+function callbackfn1(val, idx, obj) {
+  return val > 10;
+}
+
+function callbackfn2(val, idx, obj) {
+  return val > 11;
+}
+
+var toStringAccessed = false;
+var valueOfAccessed = false;
+
+var obj = {
+  0: 12,
+  1: 11,
+  2: 9,
+  length: {
+    valueOf: function() {
+      valueOfAccessed = true;
+      return {};
+    },
+    toString: function() {
+      toStringAccessed = true;
+      return '2';
+    }
+  }
+};
+
+assert(Array.prototype.every.call(obj, callbackfn1), 'Array.prototype.every.call(obj, callbackfn1) !== true');
+assert.sameValue(Array.prototype.every.call(obj, callbackfn2), false, 'Array.prototype.every.call(obj, callbackfn2)');
+assert(valueOfAccessed, 'valueOfAccessed !== true');
+assert(toStringAccessed, 'toStringAccessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-3-22.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-3-22.js
new file mode 100644
index 0000000000..047a45dd92
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-3-22.js
@@ -0,0 +1,43 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every throws TypeError exception when 'length' is
+    an object with toString and valueOf methods that don�t return
+    primitive values
+---*/
+
+var callbackfnAccessed = false;
+var toStringAccessed = false;
+var valueOfAccessed = false;
+
+function callbackfn(val, idx, obj) {
+  callbackfnAccessed = true;
+  return val > 10;
+}
+
+var obj = {
+  0: 11,
+  1: 12,
+
+  length: {
+    valueOf: function() {
+      valueOfAccessed = true;
+      return {};
+    },
+    toString: function() {
+      toStringAccessed = true;
+      return {};
+    }
+  }
+};
+assert.throws(TypeError, function() {
+  Array.prototype.every.call(obj, callbackfn);
+});
+assert(toStringAccessed, 'toStringAccessed !== true');
+assert(valueOfAccessed, 'valueOfAccessed !== true');
+assert.sameValue(callbackfnAccessed, false, 'callbackfnAccessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-3-23.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-3-23.js
new file mode 100644
index 0000000000..957425b49e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-3-23.js
@@ -0,0 +1,51 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every uses inherited valueOf method when 'length'
+    is an object with an own toString and inherited valueOf methods
+---*/
+
+function callbackfn1(val, idx, obj) {
+  return val > 10;
+}
+
+function callbackfn2(val, idx, obj) {
+  return val > 11;
+}
+
+var valueOfAccessed = false;
+var toStringAccessed = false;
+
+var proto = {
+  valueOf: function() {
+    valueOfAccessed = true;
+    return 2;
+  }
+};
+
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+
+child.toString = function() {
+  toStringAccessed = true;
+  return '1';
+};
+
+var obj = {
+  0: 12,
+  1: 11,
+  2: 9,
+  length: child
+};
+
+assert(Array.prototype.every.call(obj, callbackfn1), 'Array.prototype.every.call(obj, callbackfn1) !== true');
+assert.sameValue(Array.prototype.every.call(obj, callbackfn2), false, 'Array.prototype.every.call(obj, callbackfn2)');
+assert(valueOfAccessed, 'valueOfAccessed !== true');
+assert.sameValue(toStringAccessed, false, 'toStringAccessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-3-24.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-3-24.js
new file mode 100644
index 0000000000..cf3e03afb4
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-3-24.js
@@ -0,0 +1,29 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every - value of 'length' is a positive
+    non-integer, ensure truncation occurs in the proper direction
+---*/
+
+function callbackfn1(val, idx, obj) {
+  return val > 10;
+}
+
+function callbackfn2(val, idx, obj) {
+  return val > 11;
+}
+
+var obj = {
+  0: 12,
+  1: 11,
+  2: 9,
+  length: 2.685
+};
+
+assert(Array.prototype.every.call(obj, callbackfn1), 'Array.prototype.every.call(obj, callbackfn1) !== true');
+assert.sameValue(Array.prototype.every.call(obj, callbackfn2), false, 'Array.prototype.every.call(obj, callbackfn2)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-3-25.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-3-25.js
new file mode 100644
index 0000000000..a0172b5547
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-3-25.js
@@ -0,0 +1,27 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: Array.prototype.every - value of 'length' is a negative non-integer
+---*/
+
+function callbackfn1(val, idx, obj) {
+  return val > 10;
+}
+
+function callbackfn2(val, idx, obj) {
+  return val > 11;
+}
+
+var obj = {
+  0: 12,
+  1: 11,
+  2: 9,
+  length: -4294967294.5
+};
+
+assert(Array.prototype.every.call(obj, callbackfn1), 'Array.prototype.every.call(obj, callbackfn1) !== true');
+assert(Array.prototype.every.call(obj, callbackfn2), 'Array.prototype.every.call(obj, callbackfn2) !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-3-29.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-3-29.js
new file mode 100644
index 0000000000..f1515ea20f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-3-29.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every - value of 'length' is boundary value (2^32
+    + 1)
+---*/
+
+function callbackfn1(val, idx, obj) {
+  return val > 10;
+}
+
+function callbackfn2(val, idx, obj) {
+  return val > 11;
+}
+
+var obj = {
+  0: 11,
+  1: 9,
+  length: 4294967297
+};
+
+assert.sameValue(Array.prototype.every.call(obj, callbackfn1), false, 'Array.prototype.every.call(obj, callbackfn1)');
+assert.sameValue(Array.prototype.every.call(obj, callbackfn2), false, 'Array.prototype.every.call(obj, callbackfn2)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-3-3.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-3-3.js
new file mode 100644
index 0000000000..343a0f2283
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-3-3.js
@@ -0,0 +1,24 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: Array.prototype.every - value of 'length' is a number (value is 0)
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return val > 10;
+}
+
+var obj = {
+  0: 9,
+  length: 0
+};
+
+assert(Array.prototype.every.call(obj, callbackfn), 'Array.prototype.every.call(obj, callbackfn) !== true');
+assert.sameValue(accessed, false, 'accessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-3-4.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-3-4.js
new file mode 100644
index 0000000000..39978edf22
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-3-4.js
@@ -0,0 +1,24 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: Array.prototype.every - value of 'length' is a number (value is +0)
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return val > 10;
+}
+
+var obj = {
+  0: 9,
+  length: +0
+};
+
+assert(Array.prototype.every.call(obj, callbackfn), 'Array.prototype.every.call(obj, callbackfn) !== true');
+assert.sameValue(accessed, false, 'accessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-3-5.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-3-5.js
new file mode 100644
index 0000000000..05e0a87044
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-3-5.js
@@ -0,0 +1,24 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: Array.prototype.every - value of 'length' is a number (value is -0)
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return val > 10;
+}
+
+var obj = {
+  0: 9,
+  length: -0
+};
+
+assert(Array.prototype.every.call(obj, callbackfn), 'Array.prototype.every.call(obj, callbackfn) !== true');
+assert.sameValue(accessed, false, 'accessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-3-6.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-3-6.js
new file mode 100644
index 0000000000..b416e4edbd
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-3-6.js
@@ -0,0 +1,29 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every - value of 'length' is a number (value is
+    positive)
+---*/
+
+function callbackfn1(val, idx, obj) {
+  return val > 10;
+}
+
+function callbackfn2(val, idx, obj) {
+  return val > 11;
+}
+
+var obj = {
+  0: 12,
+  1: 11,
+  2: 9,
+  length: 2
+};
+
+assert(Array.prototype.every.call(obj, callbackfn1), 'Array.prototype.every.call(obj, callbackfn1) !== true');
+assert.sameValue(Array.prototype.every.call(obj, callbackfn2), false, 'Array.prototype.every.call(obj, callbackfn2)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-3-7.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-3-7.js
new file mode 100644
index 0000000000..9864dabcc5
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-3-7.js
@@ -0,0 +1,29 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every - value of 'length' is a number (value is
+    negative)
+---*/
+
+function callbackfn1(val, idx, obj) {
+  return val > 10;
+}
+
+function callbackfn2(val, idx, obj) {
+  return val > 11;
+}
+
+var obj = {
+  0: 12,
+  1: 11,
+  2: 9,
+  length: -4294967294
+}; //length used to exec while loop is 0
+
+assert(Array.prototype.every.call(obj, callbackfn1), 'Array.prototype.every.call(obj, callbackfn1) !== true');
+assert(Array.prototype.every.call(obj, callbackfn2), 'Array.prototype.every.call(obj, callbackfn2) !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-3-8.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-3-8.js
new file mode 100644
index 0000000000..89c0f289df
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-3-8.js
@@ -0,0 +1,27 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+es5id: 15.4.4.16-3-8
+description: >
+    Array.prototype.every - value of 'length' is a number (value is
+    Infinity)
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return val > 10;
+}
+
+var obj = {
+  0: 9,
+  length: Infinity
+};
+
+assert.sameValue(Array.prototype.every.call(obj, callbackfn), false, 'Array.prototype.every.call(obj, callbackfn)');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-3-9.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-3-9.js
new file mode 100644
index 0000000000..68982576f5
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-3-9.js
@@ -0,0 +1,27 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+es5id: 15.4.4.16-3-9
+description: >
+    Array.prototype.every - value of 'length' is a number (value is
+    -Infinity)
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return val > 10;
+}
+
+var obj = {
+  0: 9,
+  length: -Infinity
+};
+
+assert(Array.prototype.every.call(obj, callbackfn), 'Array.prototype.every.call(obj, callbackfn) !== true');
+assert.sameValue(accessed, false, 'accessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-4-1.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-4-1.js
new file mode 100644
index 0000000000..660ec859fd
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-4-1.js
@@ -0,0 +1,15 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+es5id: 15.4.4.16-4-1
+description: Array.prototype.every throws TypeError if callbackfn is undefined
+---*/
+
+var arr = new Array(10);
+assert.throws(TypeError, function() {
+  arr.every();
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-4-10.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-4-10.js
new file mode 100644
index 0000000000..436b110fde
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-4-10.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+es5id: 15.4.4.16-4-10
+description: >
+    Array.prototype.every - the exception is not thrown if exception
+    was thrown by step 2
+---*/
+
+var obj = {
+  0: 11,
+  1: 12
+};
+
+Object.defineProperty(obj, "length", {
+  get: function() {
+    throw new Test262Error();
+  },
+  configurable: true
+});
+
+assert.throws(Test262Error, function() {
+  Array.prototype.every.call(obj, undefined);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-4-11.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-4-11.js
new file mode 100644
index 0000000000..237922ffce
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-4-11.js
@@ -0,0 +1,32 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+es5id: 15.4.4.16-4-11
+description: >
+    Array.prototype.every - the exception is not thrown if exception
+    was thrown by step 3
+---*/
+
+var obj = {
+  0: 11,
+  1: 12
+};
+
+Object.defineProperty(obj, "length", {
+  get: function() {
+    return {
+      toString: function() {
+        throw new Test262Error();
+      }
+    };
+  },
+  configurable: true
+});
+
+assert.throws(Test262Error, function() {
+  Array.prototype.every.call(obj, undefined);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-4-12.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-4-12.js
new file mode 100644
index 0000000000..6621699bb0
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-4-12.js
@@ -0,0 +1,16 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+es5id: 15.4.4.16-4-12
+description: Array.prototype.every - 'callbackfn' is a function
+---*/
+
+function callbackfn(val, idx, obj) {
+  return val > 10;
+}
+
+assert.sameValue([11, 9].every(callbackfn), false, '[11, 9].every(callbackfn)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-4-15.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-4-15.js
new file mode 100644
index 0000000000..bb36b41b38
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-4-15.js
@@ -0,0 +1,39 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+es5id: 15.4.4.16-4-15
+description: >
+    Array.prototype.every - calling with no callbackfn is the same as
+    passing undefined for callbackfn
+---*/
+
+var obj = {
+  10: 10
+};
+var lengthAccessed = false;
+var loopAccessed = false;
+
+Object.defineProperty(obj, "length", {
+  get: function() {
+    lengthAccessed = true;
+    return 20;
+  },
+  configurable: true
+});
+
+Object.defineProperty(obj, "0", {
+  get: function() {
+    loopAccessed = true;
+    return 10;
+  },
+  configurable: true
+});
+assert.throws(TypeError, function() {
+  Array.prototype.every.call(obj);
+});
+assert(lengthAccessed, 'lengthAccessed !== true');
+assert.sameValue(loopAccessed, false, 'loopAccessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-4-3.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-4-3.js
new file mode 100644
index 0000000000..4e474a3aba
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-4-3.js
@@ -0,0 +1,15 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+es5id: 15.4.4.16-4-3
+description: Array.prototype.every throws TypeError if callbackfn is null
+---*/
+
+var arr = new Array(10);
+assert.throws(TypeError, function() {
+  arr.every(null);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-4-4.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-4-4.js
new file mode 100644
index 0000000000..41ba39632c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-4-4.js
@@ -0,0 +1,15 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+es5id: 15.4.4.16-4-4
+description: Array.prototype.every throws TypeError if callbackfn is boolean
+---*/
+
+var arr = new Array(10);
+assert.throws(TypeError, function() {
+  arr.every(true);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-4-5.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-4-5.js
new file mode 100644
index 0000000000..e8c3e10d4c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-4-5.js
@@ -0,0 +1,15 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+es5id: 15.4.4.16-4-5
+description: Array.prototype.every throws TypeError if callbackfn is number
+---*/
+
+var arr = new Array(10);
+assert.throws(TypeError, function() {
+  arr.every(5);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-4-6.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-4-6.js
new file mode 100644
index 0000000000..9f3ecf12a4
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-4-6.js
@@ -0,0 +1,15 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+es5id: 15.4.4.16-4-6
+description: Array.prototype.every throws TypeError if callbackfn is string
+---*/
+
+var arr = new Array(10);
+assert.throws(TypeError, function() {
+  arr.every("abc");
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-4-7.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-4-7.js
new file mode 100644
index 0000000000..8e19f45269
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-4-7.js
@@ -0,0 +1,17 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+es5id: 15.4.4.16-4-7
+description: >
+    Array.prototype.every throws TypeError if callbackfn is Object
+    without a Call internal method
+---*/
+
+var arr = new Array(10);
+assert.throws(TypeError, function() {
+  arr.every({});
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-4-8.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-4-8.js
new file mode 100644
index 0000000000..2478684e7a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-4-8.js
@@ -0,0 +1,31 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+es5id: 15.4.4.16-4-8
+description: >
+    Array.prototype.every - side effects produced by step 2 are
+    visible when an exception occurs
+---*/
+
+var obj = {
+  0: 11,
+  1: 12
+};
+
+var accessed = false;
+
+Object.defineProperty(obj, "length", {
+  get: function() {
+    accessed = true;
+    return 2;
+  },
+  configurable: true
+});
+assert.throws(TypeError, function() {
+  Array.prototype.every.call(obj, null);
+});
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-4-9.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-4-9.js
new file mode 100644
index 0000000000..62e27db550
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-4-9.js
@@ -0,0 +1,35 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+es5id: 15.4.4.16-4-9
+description: >
+    Array.prototype.every - side effects produced by step 3 are
+    visible when an exception occurs
+---*/
+
+var obj = {
+  0: 11,
+  1: 12
+};
+
+var accessed = false;
+
+Object.defineProperty(obj, "length", {
+  get: function() {
+    return {
+      toString: function() {
+        accessed = true;
+        return "2";
+      }
+    };
+  },
+  configurable: true
+});
+assert.throws(TypeError, function() {
+  Array.prototype.every.call(obj, null);
+});
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-5-1-s.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-5-1-s.js
new file mode 100644
index 0000000000..b58627a9ac
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-5-1-s.js
@@ -0,0 +1,23 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+es5id: 15.4.4.16-5-1-s
+description: Array.prototype.every - thisArg not passed to strict callbackfn
+flags: [noStrict]
+---*/
+
+var innerThisCorrect = false;
+
+function callbackfn(val, idx, obj) {
+  "use strict";
+  innerThisCorrect = this === undefined;
+  return true;
+}
+
+[1].every(callbackfn);
+
+assert(innerThisCorrect, 'innerThisCorrect !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-5-1.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-5-1.js
new file mode 100644
index 0000000000..dbbd29508b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-5-1.js
@@ -0,0 +1,22 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+es5id: 15.4.4.16-5-1
+description: Array.prototype.every - thisArg not passed
+flags: [noStrict]
+---*/
+
+var global = this;
+
+function callbackfn(val, idx, obj)
+{
+  return this === global;
+}
+
+var arr = [1];
+
+assert.sameValue(arr.every(callbackfn), true, 'arr.every(callbackfn)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-5-10.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-5-10.js
new file mode 100644
index 0000000000..772cdcf93e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-5-10.js
@@ -0,0 +1,23 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+es5id: 15.4.4.16-5-10
+description: Array.prototype.every - Array Object can be used as thisArg
+---*/
+
+var accessed = false;
+var objArray = [];
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return this === objArray;
+}
+
+
+
+assert([11].every(callbackfn, objArray), '[11].every(callbackfn, objArray) !== true');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-5-11.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-5-11.js
new file mode 100644
index 0000000000..c06aa99f50
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-5-11.js
@@ -0,0 +1,23 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+es5id: 15.4.4.16-5-11
+description: Array.prototype.every - String Object can be used as thisArg
+---*/
+
+var accessed = false;
+var objString = new String();
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return this === objString;
+}
+
+
+
+assert([11].every(callbackfn, objString), '[11].every(callbackfn, objString) !== true');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-5-12.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-5-12.js
new file mode 100644
index 0000000000..8429f21f1a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-5-12.js
@@ -0,0 +1,23 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+es5id: 15.4.4.16-5-12
+description: Array.prototype.every - Boolean Object can be used as thisArg
+---*/
+
+var accessed = false;
+var objBoolean = new Boolean();
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return this === objBoolean;
+}
+
+
+
+assert([11].every(callbackfn, objBoolean), '[11].every(callbackfn, objBoolean) !== true');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-5-13.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-5-13.js
new file mode 100644
index 0000000000..f22b4dd5bb
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-5-13.js
@@ -0,0 +1,21 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+es5id: 15.4.4.16-5-13
+description: Array.prototype.every - Number Object can be used as thisArg
+---*/
+
+var accessed = false;
+var objNumber = new Number();
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return this === objNumber;
+}
+
+assert([11].every(callbackfn, objNumber), '[11].every(callbackfn, objNumber) !== true');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-5-14.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-5-14.js
new file mode 100644
index 0000000000..6cb8c66d25
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-5-14.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+es5id: 15.4.4.16-5-14
+description: Array.prototype.every - the Math object can be used as thisArg
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return this === Math;
+}
+
+assert([11].every(callbackfn, Math), '[11].every(callbackfn, Math) !== true');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-5-15.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-5-15.js
new file mode 100644
index 0000000000..0e76efc48c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-5-15.js
@@ -0,0 +1,21 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+es5id: 15.4.4.16-5-15
+description: Array.prototype.every - Date Object can be used as thisArg
+---*/
+
+var accessed = false;
+var objDate = new Date();
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return this === objDate;
+}
+
+assert([11].every(callbackfn, objDate), '[11].every(callbackfn, objDate) !== true');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-5-16.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-5-16.js
new file mode 100644
index 0000000000..2e7e8a453d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-5-16.js
@@ -0,0 +1,21 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+es5id: 15.4.4.16-5-16
+description: Array.prototype.every - RegExp Object can be used as thisArg
+---*/
+
+var accessed = false;
+var objRegExp = new RegExp();
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return this === objRegExp;
+}
+
+assert([11].every(callbackfn, objRegExp), '[11].every(callbackfn, objRegExp) !== true');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-5-17.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-5-17.js
new file mode 100644
index 0000000000..5c856a3b35
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-5-17.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+es5id: 15.4.4.16-5-17
+description: Array.prototype.every - the JSON object can be used as thisArg
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return this === JSON;
+}
+
+assert([11].every(callbackfn, JSON), '[11].every(callbackfn, JSON) !== true');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-5-18.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-5-18.js
new file mode 100644
index 0000000000..da70339083
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-5-18.js
@@ -0,0 +1,21 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+es5id: 15.4.4.16-5-18
+description: Array.prototype.every - Error Object can be used as thisArg
+---*/
+
+var accessed = false;
+var objError = new RangeError();
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return this === objError;
+}
+
+assert([11].every(callbackfn, objError), '[11].every(callbackfn, objError) !== true');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-5-19.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-5-19.js
new file mode 100644
index 0000000000..2c77316dbd
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-5-19.js
@@ -0,0 +1,25 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+es5id: 15.4.4.16-5-19
+description: Array.prototype.every - the Arguments object can be used as thisArg
+---*/
+
+var accessed = false;
+var arg;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return this === arg;
+}
+
+(function fun() {
+  arg = arguments;
+}(1, 2, 3));
+
+assert([11].every(callbackfn, arg), '[11].every(callbackfn, arg) !== true');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-5-2.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-5-2.js
new file mode 100644
index 0000000000..8a119b612b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-5-2.js
@@ -0,0 +1,23 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+es5id: 15.4.4.16-5-2
+description: Array.prototype.every - thisArg is Object
+---*/
+
+var res = false;
+var o = new Object();
+o.res = true;
+
+function callbackfn(val, idx, obj)
+{
+  return this.res;
+}
+
+var arr = [1];
+
+assert.sameValue(arr.every(callbackfn, o), true, 'arr.every(callbackfn, o)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-5-21.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-5-21.js
new file mode 100644
index 0000000000..f3c0bb3e2f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-5-21.js
@@ -0,0 +1,21 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+es5id: 15.4.4.16-5-21
+description: Array.prototype.every - the global object can be used as thisArg
+---*/
+
+var global = this;
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return this === global;
+}
+
+assert([11].every(callbackfn, global), '[11].every(callbackfn, global) !== true');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-5-22.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-5-22.js
new file mode 100644
index 0000000000..1439f3cca3
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-5-22.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+es5id: 15.4.4.16-5-22
+description: Array.prototype.every - boolean primitive can be used as thisArg
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return this.valueOf() === false;
+}
+
+assert([11].every(callbackfn, false), '[11].every(callbackfn, false) !== true');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-5-23.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-5-23.js
new file mode 100644
index 0000000000..8726eb7180
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-5-23.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+es5id: 15.4.4.16-5-23
+description: Array.prototype.every - number primitive can be used as thisArg
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return this.valueOf() === 101;
+}
+
+assert([11].every(callbackfn, 101), '[11].every(callbackfn, 101) !== true');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-5-24.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-5-24.js
new file mode 100644
index 0000000000..6807fafebb
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-5-24.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+es5id: 15.4.4.16-5-24
+description: Array.prototype.every - string primitive can be used as thisArg
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return this.valueOf() === "abc";
+}
+
+assert([11].every(callbackfn, "abc"), '[11].every(callbackfn, "abc") !== true');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-5-3.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-5-3.js
new file mode 100644
index 0000000000..1ef5836771
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-5-3.js
@@ -0,0 +1,23 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+es5id: 15.4.4.16-5-3
+description: Array.prototype.every - thisArg is Array
+---*/
+
+var res = false;
+var a = new Array();
+a.res = true;
+
+function callbackfn(val, idx, obj)
+{
+  return this.res;
+}
+
+var arr = [1];
+
+assert.sameValue(arr.every(callbackfn, a), true, 'arr.every(callbackfn, a)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-5-4.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-5-4.js
new file mode 100644
index 0000000000..e6792a467c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-5-4.js
@@ -0,0 +1,25 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every - thisArg is object from object
+    template(prototype)
+---*/
+
+var res = false;
+
+function callbackfn(val, idx, obj)
+{
+  return this.res;
+}
+
+function foo() {}
+foo.prototype.res = true;
+var f = new foo();
+var arr = [1];
+
+assert.sameValue(arr.every(callbackfn, f), true, 'arr.every(callbackfn,f)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-5-5.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-5-5.js
new file mode 100644
index 0000000000..bd15cad257
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-5-5.js
@@ -0,0 +1,23 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: Array.prototype.every - thisArg is object from object template
+---*/
+
+var res = false;
+
+function callbackfn(val, idx, obj)
+{
+  return this.res;
+}
+
+function foo() {}
+var f = new foo();
+f.res = true;
+var arr = [1];
+
+assert.sameValue(arr.every(callbackfn, f), true, 'arr.every(callbackfn,f)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-5-6.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-5-6.js
new file mode 100644
index 0000000000..ae582cd1aa
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-5-6.js
@@ -0,0 +1,22 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: Array.prototype.every - thisArg is function
+---*/
+
+var res = false;
+
+function callbackfn(val, idx, obj)
+{
+  return this.res;
+}
+
+function foo() {}
+foo.res = true;
+var arr = [1];
+
+assert.sameValue(arr.every(callbackfn, foo), true, 'arr.every(callbackfn,foo)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-5-7.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-5-7.js
new file mode 100644
index 0000000000..39af89d8b9
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-5-7.js
@@ -0,0 +1,19 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: Array.prototype.every - built-in functions can be used as thisArg
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return this === eval;
+}
+
+assert([11].every(callbackfn, eval), '[11].every(callbackfn, eval) !== true');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-5-9.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-5-9.js
new file mode 100644
index 0000000000..6e74e1ef9a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-5-9.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: Array.prototype.every - Function Object can be used as thisArg
+---*/
+
+var accessed = false;
+var objFunction = function() {};
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return this === objFunction;
+}
+
+assert([11].every(callbackfn, objFunction), '[11].every(callbackfn, objFunction) !== true');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-1.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-1.js
new file mode 100644
index 0000000000..eaf18b68c5
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-1.js
@@ -0,0 +1,27 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every considers new elements added to array after
+    the call
+---*/
+
+var calledForThree = false;
+
+function callbackfn(val, Idx, obj)
+{
+  arr[2] = 3;
+  if (val == 3)
+    calledForThree = true;
+  return true;
+}
+
+var arr = [1, 2, , 4, 5];
+
+var res = arr.every(callbackfn);
+
+assert(calledForThree, 'calledForThree !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-2.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-2.js
new file mode 100644
index 0000000000..95ca0bee7e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-2.js
@@ -0,0 +1,25 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every considers new value of elements in array
+    after the call
+---*/
+
+function callbackfn(val, Idx, obj)
+{
+  arr[4] = 6;
+  if (val < 6)
+    return true;
+  else
+    return false;
+}
+
+var arr = [1, 2, 3, 4, 5];
+
+
+assert.sameValue(arr.every(callbackfn), false, 'arr.every(callbackfn)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-3.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-3.js
new file mode 100644
index 0000000000..f0af51e8b7
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-3.js
@@ -0,0 +1,25 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every doesn't visit deleted elements in array
+    after the call
+---*/
+
+function callbackfn(val, Idx, obj)
+{
+  delete arr[2];
+  if (val == 3)
+    return false;
+  else
+    return true;
+}
+
+var arr = [1, 2, 3, 4, 5];
+
+
+assert.sameValue(arr.every(callbackfn), true, 'arr.every(callbackfn)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-4.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-4.js
new file mode 100644
index 0000000000..8e933e580f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-4.js
@@ -0,0 +1,25 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every doesn't visit deleted elements when
+    Array.length is decreased
+---*/
+
+function callbackfn(val, Idx, obj)
+{
+  arr.length = 3;
+  if (val < 4)
+    return true;
+  else
+    return false;
+}
+
+var arr = [1, 2, 3, 4, 6];
+
+
+assert.sameValue(arr.every(callbackfn), true, 'arr.every(callbackfn)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-5.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-5.js
new file mode 100644
index 0000000000..16e3d6100f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-5.js
@@ -0,0 +1,27 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every doesn't consider newly added elements in
+    sparse array
+---*/
+
+function callbackfn(val, Idx, obj)
+{
+  arr[1000] = 3;
+  if (val < 3)
+    return true;
+  else
+    return false;
+}
+
+var arr = new Array(10);
+arr[1] = 1;
+arr[2] = 2;
+
+
+assert.sameValue(arr.every(callbackfn), true, 'arr.every(callbackfn)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-6.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-6.js
new file mode 100644
index 0000000000..3c0aea28c0
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-6.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every visits deleted element in array after the
+    call when same index is also present in prototype
+---*/
+
+function callbackfn(val, Idx, obj)
+{
+  delete arr[2];
+  if (val == 3)
+    return false;
+  else
+    return true;
+}
+
+Array.prototype[2] = 3;
+var arr = [1, 2, 3, 4, 5];
+
+var res = arr.every(callbackfn);
+delete Array.prototype[2];
+
+assert.sameValue(res, false, 'res');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-7.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-7.js
new file mode 100644
index 0000000000..4b3366964b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-7.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every - Deleting the array itself within the
+    callbackfn of Array.prototype.every is successful once
+    Array.prototype.every is called for all elements
+---*/
+
+var o = new Object();
+o.arr = [1, 2, 3, 4, 5];
+
+function callbackfn(val, Idx, obj) {
+  delete o.arr;
+  if (val === Idx + 1)
+    return true;
+  else
+    return false;
+}
+
+assert(o.arr.every(callbackfn), 'o.arr.every(callbackfn) !== true');
+assert.sameValue(o.hasOwnProperty("arr"), false, 'o.hasOwnProperty("arr")');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-8.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-8.js
new file mode 100644
index 0000000000..68a382931b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-8.js
@@ -0,0 +1,25 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: Array.prototype.every - no observable effects occur if len is 0
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return val > 10;
+}
+
+var obj = {
+  0: 11,
+  1: 12,
+  length: 0
+};
+
+assert(Array.prototype.every.call(obj, callbackfn), 'Array.prototype.every.call(obj, callbackfn) !== true');
+assert.sameValue(accessed, false, 'accessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-9.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-9.js
new file mode 100644
index 0000000000..0e778e091d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-9.js
@@ -0,0 +1,35 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every - modifications to length don't change
+    number of iterations
+---*/
+
+var called = 0;
+
+function callbackfn(val, idx, obj) {
+  called++;
+  return val > 10;
+}
+
+var obj = {
+  1: 12,
+  2: 9,
+  length: 2
+};
+
+Object.defineProperty(obj, "0", {
+  get: function() {
+    obj.length = 3;
+    return 11;
+  },
+  configurable: true
+});
+
+assert(Array.prototype.every.call(obj, callbackfn), 'Array.prototype.every.call(obj, callbackfn) !== true');
+assert.sameValue(called, 2, 'called');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-b-1.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-b-1.js
new file mode 100644
index 0000000000..b221961a43
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-b-1.js
@@ -0,0 +1,25 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every - callbackfn not called for indexes never
+    been assigned values
+---*/
+
+var callCnt = 0.;
+
+function callbackfn(val, Idx, obj)
+{
+  callCnt++;
+  return true;
+}
+
+var arr = new Array(10);
+arr[1] = undefined;
+arr.every(callbackfn);
+
+assert.sameValue(callCnt, 1, 'callCnt');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-b-10.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-b-10.js
new file mode 100644
index 0000000000..67d49de5dd
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-b-10.js
@@ -0,0 +1,35 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every - deleting property of prototype causes
+    prototype index property not to be visited on an Array-like Object
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return idx !== 1;
+}
+var arr = {
+  2: 2,
+  length: 20
+};
+
+Object.defineProperty(arr, "0", {
+  get: function() {
+    delete Object.prototype[1];
+    return 0;
+  },
+  configurable: true
+});
+
+Object.prototype[1] = 1;
+
+assert(Array.prototype.every.call(arr, callbackfn), 'Array.prototype.every.call(arr, callbackfn) !== true');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-b-11.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-b-11.js
new file mode 100644
index 0000000000..5b92707559
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-b-11.js
@@ -0,0 +1,32 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every - deleting property of prototype causes
+    prototype index property not to be visited on an Array
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return idx !== 1;
+}
+var arr = [0, , 2];
+
+Object.defineProperty(arr, "0", {
+  get: function() {
+    delete Array.prototype[1];
+    return 0;
+  },
+  configurable: true
+});
+
+Array.prototype[1] = 1;
+
+assert(arr.every(callbackfn), 'arr.every(callbackfn) !== true');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-b-12.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-b-12.js
new file mode 100644
index 0000000000..77d666ec9c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-b-12.js
@@ -0,0 +1,38 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every - deleting own property with prototype
+    property causes prototype index property to be visited on an
+    Array-like object
+---*/
+
+function callbackfn(val, idx, obj) {
+  if (idx === 1 && val === 1) {
+    return false;
+  } else {
+    return true;
+  }
+}
+var arr = {
+  0: 0,
+  1: 111,
+  2: 2,
+  length: 10
+};
+
+Object.defineProperty(arr, "0", {
+  get: function() {
+    delete arr[1];
+    return 0;
+  },
+  configurable: true
+});
+
+Object.prototype[1] = 1;
+
+assert.sameValue(Array.prototype.every.call(arr, callbackfn), false, 'Array.prototype.every.call(arr, callbackfn)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-b-13.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-b-13.js
new file mode 100644
index 0000000000..0fa44eca4d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-b-13.js
@@ -0,0 +1,32 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every - deleting own property with prototype
+    property causes prototype index property to be visited on an Array
+---*/
+
+function callbackfn(val, idx, obj) {
+  if (idx === 1 && val === 1) {
+    return false;
+  } else {
+    return true;
+  }
+}
+var arr = [0, 111, 2];
+
+Object.defineProperty(arr, "0", {
+  get: function() {
+    delete arr[1];
+    return 0;
+  },
+  configurable: true
+});
+
+Array.prototype[1] = 1;
+
+assert.sameValue(arr.every(callbackfn), false, 'arr.every(callbackfn)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-b-14.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-b-14.js
new file mode 100644
index 0000000000..19b1312ebd
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-b-14.js
@@ -0,0 +1,30 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every - decreasing length of array causes index
+    property not to be visited
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return idx !== 3;
+}
+var arr = [0, 1, 2, "last"];
+
+Object.defineProperty(arr, "0", {
+  get: function() {
+    arr.length = 3;
+    return 0;
+  },
+  configurable: true
+});
+
+assert(arr.every(callbackfn), 'arr.every(callbackfn) !== true');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-b-15.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-b-15.js
new file mode 100644
index 0000000000..fce7ac918e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-b-15.js
@@ -0,0 +1,37 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every - decreasing length of array with prototype
+    property causes prototype index property to be visited
+---*/
+
+function callbackfn(val, idx, obj) {
+  if (idx === 2 && val === "prototype") {
+    return false;
+  } else {
+    return true;
+  }
+}
+var arr = [0, 1, 2];
+
+Object.defineProperty(Array.prototype, "2", {
+  get: function() {
+    return "prototype";
+  },
+  configurable: true
+});
+
+Object.defineProperty(arr, "1", {
+  get: function() {
+    arr.length = 2;
+    return 1;
+  },
+  configurable: true
+});
+
+assert.sameValue(arr.every(callbackfn), false, 'arr.every(callbackfn)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-b-16.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-b-16.js
new file mode 100644
index 0000000000..e60d1682bb
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-b-16.js
@@ -0,0 +1,39 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every - decreasing length of array does not delete
+    non-configurable properties
+flags: [noStrict]
+---*/
+
+function callbackfn(val, idx, obj) {
+  if (idx === 2 && val === "unconfigurable") {
+    return false;
+  } else {
+    return true;
+  }
+}
+
+var arr = [0, 1, 2];
+
+Object.defineProperty(arr, "2", {
+  get: function() {
+    return "unconfigurable";
+  },
+  configurable: false
+});
+
+Object.defineProperty(arr, "1", {
+  get: function() {
+    arr.length = 2;
+    return 1;
+  },
+  configurable: true
+});
+
+assert.sameValue(arr.every(callbackfn), false, 'arr.every(callbackfn)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-b-2.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-b-2.js
new file mode 100644
index 0000000000..25914b29bd
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-b-2.js
@@ -0,0 +1,29 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: Array.prototype.every - added properties in step 2 are visible here
+---*/
+
+function callbackfn(val, idx, obj) {
+  if (idx === 2 && val === "length") {
+    return false;
+  } else {
+    return true;
+  }
+}
+
+var arr = {};
+
+Object.defineProperty(arr, "length", {
+  get: function() {
+    arr[2] = "length";
+    return 3;
+  },
+  configurable: true
+});
+
+assert.sameValue(Array.prototype.every.call(arr, callbackfn), false, 'Array.prototype.every.call(arr, callbackfn)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-b-3.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-b-3.js
new file mode 100644
index 0000000000..73a2623d5f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-b-3.js
@@ -0,0 +1,33 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every - deleted properties in step 2 are visible
+    here
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return idx !== 2;
+}
+var arr = {
+  2: 6.99,
+  8: 19
+};
+
+Object.defineProperty(arr, "length", {
+  get: function() {
+    delete arr[2];
+    return 10;
+  },
+  configurable: true
+});
+
+assert(Array.prototype.every.call(arr, callbackfn), 'Array.prototype.every.call(arr, callbackfn) !== true');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-b-4.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-b-4.js
new file mode 100644
index 0000000000..2b87ad1e0d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-b-4.js
@@ -0,0 +1,38 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every - properties added into own object after
+    current position are visited on an Array-like object
+---*/
+
+function callbackfn(val, idx, obj) {
+  if (idx === 1 && val === 1) {
+    return false;
+  } else {
+    return true;
+  }
+}
+
+var arr = {
+  length: 2
+};
+
+Object.defineProperty(arr, "0", {
+  get: function() {
+    Object.defineProperty(arr, "1", {
+      get: function() {
+        return 1;
+      },
+      configurable: true
+    });
+    return 0;
+  },
+  configurable: true
+});
+
+assert.sameValue(Array.prototype.every.call(arr, callbackfn), false, 'Array.prototype.every.call(arr, callbackfn)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-b-5.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-b-5.js
new file mode 100644
index 0000000000..cda8b9df39
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-b-5.js
@@ -0,0 +1,36 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every - properties added into own object after
+    current position are visited on an Array
+---*/
+
+function callbackfn(val, idx, obj) {
+  if (idx === 1 && val === 1) {
+    return false;
+  } else {
+    return true;
+  }
+}
+
+var arr = [0, , 2];
+
+Object.defineProperty(arr, "0", {
+  get: function() {
+    Object.defineProperty(arr, "1", {
+      get: function() {
+        return 1;
+      },
+      configurable: true
+    });
+    return 0;
+  },
+  configurable: true
+});
+
+assert.sameValue(arr.every(callbackfn), false, 'arr.every(callbackfn)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-b-6.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-b-6.js
new file mode 100644
index 0000000000..727635b49d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-b-6.js
@@ -0,0 +1,37 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every - properties can be added to prototype after
+    current position are visited on an Array-like object
+---*/
+
+function callbackfn(val, idx, obj) {
+  if (idx === 1 && val === 6.99) {
+    return false;
+  } else {
+    return true;
+  }
+}
+var arr = {
+  length: 2
+};
+
+Object.defineProperty(arr, "0", {
+  get: function() {
+    Object.defineProperty(Object.prototype, "1", {
+      get: function() {
+        return 6.99;
+      },
+      configurable: true
+    });
+    return 0;
+  },
+  configurable: true
+});
+
+assert.sameValue(Array.prototype.every.call(arr, callbackfn), false, 'Array.prototype.every.call(arr, callbackfn)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-b-7.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-b-7.js
new file mode 100644
index 0000000000..9ff0cf2689
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-b-7.js
@@ -0,0 +1,35 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every - properties can be added to prototype after
+    current position are visited on an Array
+---*/
+
+function callbackfn(val, idx, obj) {
+  if (idx === 1 && val === 6.99) {
+    return false;
+  } else {
+    return true;
+  }
+}
+var arr = [0, , 2];
+
+Object.defineProperty(arr, "0", {
+  get: function() {
+    Object.defineProperty(Array.prototype, "1", {
+      get: function() {
+        return 6.99;
+      },
+      configurable: true
+    });
+    return 0;
+  },
+  configurable: true
+});
+
+assert.sameValue(arr.every(callbackfn), false, 'arr.every(callbackfn)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-b-8.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-b-8.js
new file mode 100644
index 0000000000..f57a6a8d79
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-b-8.js
@@ -0,0 +1,39 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every - deleting own property causes index
+    property not to be visited on an Array-like object
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return idx !== 1;
+}
+var obj = {
+  length: 2
+};
+
+Object.defineProperty(obj, "1", {
+  get: function() {
+    return 6.99;
+  },
+  configurable: true
+});
+
+Object.defineProperty(obj, "0", {
+  get: function() {
+    delete obj[1];
+    return 0;
+  },
+  configurable: true
+});
+
+assert(Array.prototype.every.call(obj, callbackfn), 'Array.prototype.every.call(obj, callbackfn) !== true');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-b-9.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-b-9.js
new file mode 100644
index 0000000000..af743c4c9a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-b-9.js
@@ -0,0 +1,37 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every - deleting own property causes index
+    property not to be visited on an Array
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return idx !== 1;
+}
+var arr = [1, 2];
+
+Object.defineProperty(arr, "1", {
+  get: function() {
+    return "6.99";
+  },
+  configurable: true
+});
+
+Object.defineProperty(arr, "0", {
+  get: function() {
+    delete arr[1];
+    return 0;
+  },
+  configurable: true
+});
+
+assert(arr.every(callbackfn), 'arr.every(callbackfn) !== true');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-i-1.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-i-1.js
new file mode 100644
index 0000000000..a3ec312a6f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-i-1.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every - element to be retrieved is own data
+    property on an Array-like object
+---*/
+
+var kValue = {};
+
+function callbackfn(val, idx, obj) {
+  if (idx === 5) {
+    return val !== kValue;
+  } else {
+    return true;
+  }
+}
+
+var obj = {
+  5: kValue,
+  length: 100
+};
+
+assert.sameValue(Array.prototype.every.call(obj, callbackfn), false, 'Array.prototype.every.call(obj, callbackfn)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-i-10.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-i-10.js
new file mode 100644
index 0000000000..e6ce8319dc
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-i-10.js
@@ -0,0 +1,30 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every - element to be retrieved is own accessor
+    property on an Array
+---*/
+
+function callbackfn(val, idx, obj) {
+  if (idx === 2) {
+    return val !== 12;
+  } else {
+    return true;
+  }
+}
+
+var arr = [];
+
+Object.defineProperty(arr, "2", {
+  get: function() {
+    return 12;
+  },
+  configurable: true
+});
+
+assert.sameValue(arr.every(callbackfn), false, 'arr.every(callbackfn)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-i-11.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-i-11.js
new file mode 100644
index 0000000000..9dbb01c5c4
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-i-11.js
@@ -0,0 +1,40 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every - element to be retrieved is own accessor
+    property that overrides an inherited data property on an
+    Array-like object
+---*/
+
+function callbackfn(val, idx, obj) {
+  if (idx === 0) {
+    return val === 5;
+  } else {
+    return true;
+  }
+}
+
+var proto = {
+  0: 5,
+  1: 6
+};
+
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+child.length = 10;
+
+Object.defineProperty(child, "0", {
+  get: function() {
+    return 11;
+  },
+  configurable: true
+});
+
+assert.sameValue(Array.prototype.every.call(child, callbackfn), false, 'Array.prototype.every.call(child, callbackfn)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-i-12.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-i-12.js
new file mode 100644
index 0000000000..f84e20f1bc
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-i-12.js
@@ -0,0 +1,32 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every - element to be retrieved is own accessor
+    property that overrides an inherited data property on an Array
+---*/
+
+function callbackfn(val, idx, obj) {
+  if (idx === 0) {
+    return val === 10;
+  } else {
+    return true;
+  }
+}
+
+var arr = [];
+
+Array.prototype[0] = 10;
+
+Object.defineProperty(arr, "0", {
+  get: function() {
+    return 111;
+  },
+  configurable: true
+});
+
+assert.sameValue(arr.every(callbackfn), false, 'arr.every(callbackfn)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-i-13.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-i-13.js
new file mode 100644
index 0000000000..1189f25845
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-i-13.js
@@ -0,0 +1,45 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every - element to be retrieved is own accessor
+    property that overrides an inherited accessor property on an
+    Array-like object
+---*/
+
+function callbackfn(val, idx, obj) {
+  if (idx === 1) {
+    return val === 6;
+  } else {
+    return true;
+  }
+}
+
+var proto = {};
+
+Object.defineProperty(proto, "1", {
+  get: function() {
+    return 6;
+  },
+  configurable: true
+});
+
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+child.length = 10;
+
+Object.defineProperty(child, "1", {
+  get: function() {
+    return 12;
+  },
+  configurable: true
+});
+
+
+assert.sameValue(Array.prototype.every.call(child, callbackfn), false, 'Array.prototype.every.call(child, callbackfn)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-i-14.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-i-14.js
new file mode 100644
index 0000000000..a02801f02d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-i-14.js
@@ -0,0 +1,37 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every - element to be retrieved is own accessor
+    property that overrides an inherited accessor property on an Array
+---*/
+
+function callbackfn(val, idx, obj) {
+  if (idx === 0) {
+    return val === 5;
+  } else {
+    return true;
+  }
+}
+
+var arr = [];
+
+Object.defineProperty(Array.prototype, "0", {
+  get: function() {
+    return 5;
+  },
+  configurable: true
+});
+
+Object.defineProperty(arr, "0", {
+  get: function() {
+    return 11;
+  },
+  configurable: true
+});
+
+assert.sameValue(arr.every(callbackfn), false, 'arr.every(callbackfn)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-i-15.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-i-15.js
new file mode 100644
index 0000000000..eafb0d8281
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-i-15.js
@@ -0,0 +1,36 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every - element to be retrieved is inherited
+    accessor property on an Array-like object
+---*/
+
+function callbackfn(val, idx, obj) {
+  if (idx === 1) {
+    return val !== 11;
+  } else {
+    return true;
+  }
+}
+
+var proto = {};
+
+Object.defineProperty(proto, "1", {
+  get: function() {
+    return 11;
+  },
+  configurable: true
+});
+
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+child.length = 20;
+
+assert.sameValue(Array.prototype.every.call(child, callbackfn), false, 'Array.prototype.every.call(child, callbackfn)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-i-16.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-i-16.js
new file mode 100644
index 0000000000..91b7955ae5
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-i-16.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every - element to be retrieved is inherited
+    accessor property on an Array
+---*/
+
+function callbackfn(val, idx, obj) {
+  if (idx === 0) {
+    return val !== 11;
+  } else {
+    return true;
+  }
+}
+
+Object.defineProperty(Array.prototype, "0", {
+  get: function() {
+    return 11;
+  },
+  configurable: true
+});
+
+assert.sameValue([, , , ].every(callbackfn), false, '[, , , ].every(callbackfn)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-i-17.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-i-17.js
new file mode 100644
index 0000000000..0b2a3ca6e0
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-i-17.js
@@ -0,0 +1,29 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every - element to be retrieved is own accessor
+    property without a get function on an Array-like object
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return typeof val === "undefined";
+}
+
+var obj = {
+  length: 2
+};
+Object.defineProperty(obj, "1", {
+  set: function() {},
+  configurable: true
+});
+
+assert(Array.prototype.every.call(obj, callbackfn), 'Array.prototype.every.call(obj, callbackfn) !== true');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-i-18.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-i-18.js
new file mode 100644
index 0000000000..0a54c4f918
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-i-18.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every - element to be retrieved is own accessor
+    property without a get function on an Array
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return typeof val === "undefined";
+}
+
+var arr = [];
+
+Object.defineProperty(arr, "0", {
+  set: function() {},
+  configurable: true
+});
+
+assert(arr.every(callbackfn), 'arr.every(callbackfn) !== true');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-i-19.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-i-19.js
new file mode 100644
index 0000000000..760a06ae6e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-i-19.js
@@ -0,0 +1,32 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every - element to be retrieved is own accessor
+    property without a get function that overrides an inherited
+    accessor property on an Array-like object
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return typeof val === "undefined";
+}
+
+var obj = {
+  length: 2
+};
+Object.defineProperty(obj, "1", {
+  set: function() {},
+  configurable: true
+});
+
+Object.prototype[1] = 10;
+
+assert(Array.prototype.every.call(obj, callbackfn), 'Array.prototype.every.call(obj, callbackfn) !== true');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-i-2.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-i-2.js
new file mode 100644
index 0000000000..98b6c2bdbd
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-i-2.js
@@ -0,0 +1,21 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every - element to be retrieved is own data
+    property on an Array
+---*/
+
+var called = 0;
+
+function callbackfn(val, idx, obj) {
+  called++;
+  return val === 11;
+}
+
+assert([11].every(callbackfn), '[11].every(callbackfn) !== true');
+assert.sameValue(called, 1, 'called');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-i-20.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-i-20.js
new file mode 100644
index 0000000000..e321a06144
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-i-20.js
@@ -0,0 +1,31 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every - element to be retrieved is own accessor
+    property without a get function that overrides an inherited
+    accessor property on an Array
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return typeof val === "undefined";
+}
+
+var arr = [];
+
+Object.defineProperty(arr, "0", {
+  set: function() {},
+  configurable: true
+});
+
+Array.prototype[0] = 100;
+
+assert(arr.every(callbackfn), 'arr.every(callbackfn) !== true');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-i-21.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-i-21.js
new file mode 100644
index 0000000000..4eb8479bf3
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-i-21.js
@@ -0,0 +1,33 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every - element to be retrieved is inherited
+    accessor property without a get function on an Array-like object
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return typeof val === "undefined";
+}
+
+var proto = {};
+Object.defineProperty(proto, "1", {
+  set: function() {},
+  configurable: true
+});
+
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+child.length = 2;
+
+assert(Array.prototype.every.call(child, callbackfn), 'Array.prototype.every.call(child, callbackfn) !== true');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-i-22.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-i-22.js
new file mode 100644
index 0000000000..ce383847fa
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-i-22.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every - element to be retrieved is inherited
+    accessor property without a get function on an Array
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return typeof val === "undefined";
+}
+
+Object.defineProperty(Array.prototype, "0", {
+  set: function() {},
+  configurable: true
+});
+
+assert([, ].every(callbackfn), '[, ].every(callbackfn) !== true');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-i-25.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-i-25.js
new file mode 100644
index 0000000000..89bdfc77b7
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-i-25.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every - This object is the Arguments object which
+    implements its own property get method (number of arguments is
+    less than number of parameters)
+---*/
+
+var called = 0;
+
+function callbackfn(val, idx, obj) {
+  called++;
+  return val === 11;
+}
+
+var func = function(a, b) {
+  return Array.prototype.every.call(arguments, callbackfn);
+};
+
+assert(func(11), 'func(11) !== true');
+assert.sameValue(called, 1, 'called');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-i-26.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-i-26.js
new file mode 100644
index 0000000000..95085b4dc5
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-i-26.js
@@ -0,0 +1,32 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every - This object is the Arguments object which
+    implements its own property get method (number of arguments equals
+    number of parameters)
+---*/
+
+var called = 0;
+
+function callbackfn(val, idx, obj) {
+  called++;
+  if (idx === 0) {
+    return val === 11;
+  } else if (idx === 1) {
+    return val === 9;
+  } else {
+    return false;
+  }
+}
+
+var func = function(a, b) {
+  return Array.prototype.every.call(arguments, callbackfn);
+};
+
+assert(func(11, 9), 'func(11, 9) !== true');
+assert.sameValue(called, 2, 'called');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-i-27.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-i-27.js
new file mode 100644
index 0000000000..5828d3d03a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-i-27.js
@@ -0,0 +1,32 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every - This object is the Arguments object which
+    implements its own property get method (number of arguments is
+    greater than number of parameters)
+---*/
+
+var called = 0;
+
+function callbackfn(val, idx, obj) {
+  called++;
+  if (idx < 2) {
+    return val > 10;
+  } else if (idx === 2) {
+    return val < 10;
+  } else {
+    return false;
+  }
+}
+
+var func = function(a, b) {
+  return Array.prototype.every.call(arguments, callbackfn);
+};
+
+assert(func(11, 12, 9), 'func(11, 12, 9) !== true');
+assert.sameValue(called, 3, 'called');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-i-28.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-i-28.js
new file mode 100644
index 0000000000..13fc6575d4
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-i-28.js
@@ -0,0 +1,39 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every - element changed by getter on previous
+    iterations is observed on an Array
+---*/
+
+var preIterVisible = false;
+var arr = [];
+
+function callbackfn(val, idx, obj) {
+  return val > 10;
+}
+
+Object.defineProperty(arr, "0", {
+  get: function() {
+    preIterVisible = true;
+    return 11;
+  },
+  configurable: true
+});
+
+Object.defineProperty(arr, "1", {
+  get: function() {
+    if (preIterVisible) {
+      return 9;
+    } else {
+      return 11;
+    }
+  },
+  configurable: true
+});
+
+assert.sameValue(arr.every(callbackfn), false, 'arr.every(callbackfn)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-i-29.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-i-29.js
new file mode 100644
index 0000000000..ec59d0df3e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-i-29.js
@@ -0,0 +1,41 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every - element changed by getter on previous
+    iterations is observed on an Array-like object
+---*/
+
+function callbackfn(val, idx, obj) {
+  return val > 10;
+}
+
+var preIterVisible = false;
+var obj = {
+  length: 2
+};
+
+Object.defineProperty(obj, "0", {
+  get: function() {
+    preIterVisible = true;
+    return 11;
+  },
+  configurable: true
+});
+
+Object.defineProperty(obj, "1", {
+  get: function() {
+    if (preIterVisible) {
+      return 9;
+    } else {
+      return 13;
+    }
+  },
+  configurable: true
+});
+
+assert.sameValue(Array.prototype.every.call(obj, callbackfn), false, 'Array.prototype.every.call(obj, callbackfn)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-i-3.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-i-3.js
new file mode 100644
index 0000000000..5d51ec7e94
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-i-3.js
@@ -0,0 +1,33 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every - element to be retrieved is own data
+    property that overrides an inherited data property on an Array
+---*/
+
+function callbackfn(val, idx, obj) {
+  if (idx === 5) {
+    return val === 100;
+  } else {
+    return true;
+  }
+}
+
+var proto = {
+  0: 11,
+  5: 100
+};
+
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+child[5] = "abc";
+child.length = 10;
+
+assert.sameValue(Array.prototype.every.call(child, callbackfn), false, 'Array.prototype.every.call(child, callbackfn)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-i-30.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-i-30.js
new file mode 100644
index 0000000000..1827b8392c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-i-30.js
@@ -0,0 +1,37 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every - unnhandled exceptions happened in getter
+    terminate iteration on an Array-like object
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  if (idx > 1) {
+    accessed = true;
+  }
+  return true;
+}
+
+var obj = {
+  0: 11,
+  5: 10,
+  10: 8,
+  length: 20
+};
+Object.defineProperty(obj, "1", {
+  get: function() {
+    throw new RangeError("unhandle exception happened in getter");
+  },
+  configurable: true
+});
+assert.throws(RangeError, function() {
+  Array.prototype.every.call(obj, callbackfn);
+});
+assert.sameValue(accessed, false, 'accessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-i-31.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-i-31.js
new file mode 100644
index 0000000000..b31a514d9b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-i-31.js
@@ -0,0 +1,35 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every - unhandled exceptions happened in getter
+    terminate iteration on an Array
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  if (idx > 1) {
+    accessed = true;
+  }
+  return true;
+}
+
+var arr = [];
+arr[5] = 10;
+arr[10] = 100;
+
+Object.defineProperty(arr, "1", {
+  get: function() {
+    throw new RangeError("unhandle exception happened in getter");
+  },
+  configurable: true
+});
+assert.throws(RangeError, function() {
+  arr.every(callbackfn);
+});
+assert.sameValue(accessed, false, 'accessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-i-4.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-i-4.js
new file mode 100644
index 0000000000..c80150753e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-i-4.js
@@ -0,0 +1,24 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every - element to be retrieved is own data
+    property that overrides an inherited data property on an Array
+---*/
+
+var called = 0;
+
+function callbackfn(val, idx, obj) {
+  called++;
+  return val === 12;
+}
+
+Array.prototype[0] = 11;
+Array.prototype[1] = 11;
+
+assert([12, 12].every(callbackfn), '[12, 12].every(callbackfn) !== true');
+assert.sameValue(called, 2, 'called');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-i-5.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-i-5.js
new file mode 100644
index 0000000000..75da7d1972
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-i-5.js
@@ -0,0 +1,42 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every - element to be retrieved is own data
+    property that overrides an inherited accessor property on an
+    Array-like object
+---*/
+
+function callbackfn(val, idx, obj) {
+  if (idx === 0) {
+    return val === 5;
+  } else {
+    return true;
+  }
+}
+
+var proto = {};
+
+Object.defineProperty(proto, "0", {
+  get: function() {
+    return 5;
+  },
+  configurable: true
+});
+
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+child.length = 2;
+Object.defineProperty(child, "0", {
+  value: 11,
+  configurable: true
+});
+child[1] = 12;
+
+assert.sameValue(Array.prototype.every.call(child, callbackfn), false, 'Array.prototype.every.call(child, callbackfn)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-i-6.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-i-6.js
new file mode 100644
index 0000000000..b5a7668a9c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-i-6.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every - element to be retrieved is own data
+    property that overrides an inherited accessor property on an Array
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return val === 11;
+}
+
+Object.defineProperty(Array.prototype, "0", {
+  get: function() {
+    return 9;
+  },
+  configurable: true
+});
+
+assert([11].every(callbackfn), '[11].every(callbackfn) !== true');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-i-7.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-i-7.js
new file mode 100644
index 0000000000..9b94b838a1
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-i-7.js
@@ -0,0 +1,33 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every - element to be retrieved is inherited data
+    property on an Array-like object
+---*/
+
+var kValue = 'abc';
+
+function callbackfn(val, idx, obj) {
+  if (idx === 5) {
+    return val !== kValue;
+  } else {
+    return true;
+  }
+}
+
+var proto = {
+  5: kValue
+};
+
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+child.length = 10;
+
+assert.sameValue(Array.prototype.every.call(child, callbackfn), false, 'Array.prototype.every.call(child, callbackfn)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-i-8.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-i-8.js
new file mode 100644
index 0000000000..d3acaa169d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-i-8.js
@@ -0,0 +1,23 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every - element to be retrieved is inherited data
+    property on an Array
+---*/
+
+function callbackfn(val, idx, obj) {
+  if (idx === 1) {
+    return val !== 13;
+  } else {
+    return true;
+  }
+}
+
+Array.prototype[1] = 13;
+
+assert.sameValue([, , , ].every(callbackfn), false, '[, , , ].every(callbackfn)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-i-9.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-i-9.js
new file mode 100644
index 0000000000..5676f4d329
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-i-9.js
@@ -0,0 +1,34 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every - element to be retrieved is own accessor
+    property on an Array-like object
+---*/
+
+function callbackfn(val, idx, obj) {
+  if (idx === 0) {
+    return val !== 11;
+  } else {
+    return true;
+  }
+}
+
+var obj = {
+  10: 10,
+  length: 20
+};
+
+Object.defineProperty(obj, "0", {
+  get: function() {
+    return 11;
+  },
+  configurable: true
+});
+
+
+assert.sameValue(Array.prototype.every.call(obj, callbackfn), false, 'Array.prototype.every.call(obj, callbackfn)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-ii-1.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-ii-1.js
new file mode 100644
index 0000000000..cafd32233c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-ii-1.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: Array.prototype.every - callbackfn called with correct parameters
+---*/
+
+function callbackfn(val, Idx, obj)
+{
+  if (obj[Idx] === val)
+    return true;
+}
+
+var arr = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9];
+
+
+assert.sameValue(arr.every(callbackfn), true, 'arr.every(callbackfn)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-ii-10.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-ii-10.js
new file mode 100644
index 0000000000..8e70a78688
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-ii-10.js
@@ -0,0 +1,21 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every - callbackfn is called with 1 formal
+    parameter
+---*/
+
+var called = 0;
+
+function callbackfn(val) {
+  called++;
+  return val > 10;
+}
+
+assert([11, 12].every(callbackfn), '[11, 12].every(callbackfn) !== true');
+assert.sameValue(called, 2, 'called');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-ii-11.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-ii-11.js
new file mode 100644
index 0000000000..8f62a39f46
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-ii-11.js
@@ -0,0 +1,21 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every - callbackfn is called with 2 formal
+    parameter
+---*/
+
+var called = 0;
+
+function callbackfn(val, idx) {
+  called++;
+  return val > 10 && arguments[2][idx] === val;
+}
+
+assert([11, 12].every(callbackfn), '[11, 12].every(callbackfn) !== true');
+assert.sameValue(called, 2, 'called');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-ii-12.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-ii-12.js
new file mode 100644
index 0000000000..41a1faeb43
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-ii-12.js
@@ -0,0 +1,21 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every - callbackfn is called with 3 formal
+    parameter
+---*/
+
+var called = 0;
+
+function callbackfn(val, idx, obj) {
+  called++;
+  return val > 10 && obj[idx] === val;
+}
+
+assert([11, 12, 13].every(callbackfn), '[11, 12, 13].every(callbackfn) !== true');
+assert.sameValue(called, 3, 'called');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-ii-13.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-ii-13.js
new file mode 100644
index 0000000000..1744fed957
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-ii-13.js
@@ -0,0 +1,21 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every - callbackfn that uses arguments object to
+    get parameter value
+---*/
+
+var called = 0;
+
+function callbackfn() {
+  called++;
+  return arguments[2][arguments[1]] === arguments[0];
+}
+
+assert([11, 12].every(callbackfn), '[11, 12].every(callbackfn) !== true');
+assert.sameValue(called, 2, 'called');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-ii-16.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-ii-16.js
new file mode 100644
index 0000000000..f3703a9d63
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-ii-16.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every - 'this' of 'callbackfn' is a Boolean object
+    when T is not an object (T is a boolean primitive)
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return this.valueOf() !== false;
+}
+
+var obj = {
+  0: 11,
+  length: 2
+};
+
+assert.sameValue(Array.prototype.every.call(obj, callbackfn, false), false, 'Array.prototype.every.call(obj, callbackfn, false)');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-ii-17.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-ii-17.js
new file mode 100644
index 0000000000..c802a549d1
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-ii-17.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every -'this' of 'callbackfn' is a Number object
+    when T is not an object (T is a number primitive)
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, o) {
+  accessed = true;
+  return 5 === this.valueOf();
+}
+
+var obj = {
+  0: 11,
+  length: 2
+};
+
+assert(Array.prototype.every.call(obj, callbackfn, 5), 'Array.prototype.every.call(obj, callbackfn, 5) !== true');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-ii-18.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-ii-18.js
new file mode 100644
index 0000000000..0efd97e77f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-ii-18.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every - 'this' of 'callbackfn' is an String object
+    when T is not an object (T is a string primitive)
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return 'hello' === this.valueOf();
+}
+
+var obj = {
+  0: 11,
+  length: 2
+};
+
+assert(Array.prototype.every.call(obj, callbackfn, "hello"), 'Array.prototype.every.call(obj, callbackfn, "hello") !== true');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-ii-19.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-ii-19.js
new file mode 100644
index 0000000000..074faed23a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-ii-19.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: Array.prototype.every - non-indexed properties are not called
+---*/
+
+var called = 0;
+
+function callbackfn(val, idx, obj) {
+  called++;
+  return val !== 8;
+}
+
+var obj = {
+  0: 11,
+  10: 12,
+  non_index_property: 8,
+  length: 20
+};
+
+assert(Array.prototype.every.call(obj, callbackfn), 'Array.prototype.every.call(obj, callbackfn) !== true');
+assert.sameValue(called, 2, 'called');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-ii-2.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-ii-2.js
new file mode 100644
index 0000000000..9ff21a0194
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-ii-2.js
@@ -0,0 +1,21 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: Array.prototype.every - callbackfn takes 3 arguments
+---*/
+
+function callbackfn(val, Idx, obj)
+{
+  if (arguments.length === 3) //verify if callbackfn was called with 3 parameters
+    return true;
+}
+
+var arr = [0, 1, true, null, new Object(), "five"];
+arr[999999] = -6.6;
+
+
+assert.sameValue(arr.every(callbackfn), true, 'arr.every(callbackfn)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-ii-20.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-ii-20.js
new file mode 100644
index 0000000000..31df2f4e2e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-ii-20.js
@@ -0,0 +1,29 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every - callbackfn called with correct parameters
+    (thisArg is correct)
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return 10 === this.threshold;
+}
+
+var thisArg = {
+  threshold: 10
+};
+
+var obj = {
+  0: 11,
+  length: 1
+};
+
+assert(Array.prototype.every.call(obj, callbackfn, thisArg), 'Array.prototype.every.call(obj, callbackfn, thisArg) !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-ii-21.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-ii-21.js
new file mode 100644
index 0000000000..008fa8586c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-ii-21.js
@@ -0,0 +1,34 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every - callbackfn called with correct parameters
+    (kValue is correct)
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  if (idx === 0) {
+    return val === 11;
+  }
+
+  if (idx === 1) {
+    return val === 12;
+  }
+
+}
+
+var obj = {
+  0: 11,
+  1: 12,
+  length: 2
+};
+
+assert(Array.prototype.every.call(obj, callbackfn), 'Array.prototype.every.call(obj, callbackfn) !== true');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-ii-22.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-ii-22.js
new file mode 100644
index 0000000000..70d72b873f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-ii-22.js
@@ -0,0 +1,34 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every - callbackfn called with correct parameters
+    (the index k is correct)
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  if (val === 11) {
+    return idx === 0;
+  }
+
+  if (val === 12) {
+    return idx === 1;
+  }
+
+}
+
+var obj = {
+  0: 11,
+  1: 12,
+  length: 2
+};
+
+assert(Array.prototype.every.call(obj, callbackfn), 'Array.prototype.every.call(obj, callbackfn) !== true');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-ii-23.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-ii-23.js
new file mode 100644
index 0000000000..ac38a0b929
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-ii-23.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every - callbackfn called with correct parameters
+    (this object O is correct)
+---*/
+
+var called = 0;
+var obj = {
+  0: 11,
+  1: 12,
+  length: 2
+};
+
+function callbackfn(val, idx, o) {
+  called++;
+  return obj === o;
+}
+
+assert(Array.prototype.every.call(obj, callbackfn), 'Array.prototype.every.call(obj, callbackfn) !== true');
+assert.sameValue(called, 2, 'called');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-ii-3.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-ii-3.js
new file mode 100644
index 0000000000..a0f62215e9
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-ii-3.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every immediately returns false if callbackfn
+    returns false
+---*/
+
+var callCnt = 0;
+
+function callbackfn(val, idx, obj)
+{
+  callCnt++;
+  if (idx > 5)
+    return false;
+  else
+    return true;
+}
+
+var arr = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9];
+
+
+assert.sameValue(arr.every(callbackfn), false, 'arr.every(callbackfn)');
+assert.sameValue(callCnt, 7, 'callCnt');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-ii-4.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-ii-4.js
new file mode 100644
index 0000000000..6962bc7c4f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-ii-4.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every - k values are passed in ascending numeric
+    order
+---*/
+
+var arr = [0, 1, 2, 3, 4, 5];
+var lastIdx = 0;
+var called = 0;
+
+function callbackfn(val, idx, o) {
+  called++;
+  if (lastIdx !== idx) {
+    return false;
+  } else {
+    lastIdx++;
+    return true;
+  }
+}
+
+assert(arr.every(callbackfn), 'arr.every(callbackfn) !== true');
+assert.sameValue(arr.length, called, 'arr.length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-ii-5.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-ii-5.js
new file mode 100644
index 0000000000..655134d01a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-ii-5.js
@@ -0,0 +1,33 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every - k values are accessed during each
+    iteration and not prior to starting the loop on an Array
+---*/
+
+var called = 0;
+var kIndex = [];
+
+//By below way, we could verify that k would be setted as 0, 1, ..., length - 1 in order, and each value will be setted one time.
+function callbackfn(val, idx, obj) {
+  called++;
+  //Each position should be visited one time, which means k is accessed one time during iterations.
+  if (typeof kIndex[idx] === "undefined") {
+    //when current position is visited, its previous index should has been visited.
+    if (idx !== 0 && typeof kIndex[idx - 1] === "undefined") {
+      return false;
+    }
+    kIndex[idx] = 1;
+    return true;
+  } else {
+    return false;
+  }
+}
+
+assert([11, 12, 13, 14].every(callbackfn, undefined), '[11, 12, 13, 14].every(callbackfn, undefined) !== true');
+assert.sameValue(called, 4, 'called');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-ii-6.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-ii-6.js
new file mode 100644
index 0000000000..16eba872ab
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-ii-6.js
@@ -0,0 +1,27 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: Array.prototype.every - arguments to callbackfn are self consistent
+---*/
+
+var accessed = false;
+var thisArg = {};
+var obj = {
+  0: 11,
+  length: 1
+};
+
+function callbackfn() {
+  accessed = true;
+  return this === thisArg &&
+    arguments[0] === 11 &&
+    arguments[1] === 0 &&
+    arguments[2] === obj;
+}
+
+assert(Array.prototype.every.call(obj, callbackfn, thisArg), 'Array.prototype.every.call(obj, callbackfn, thisArg) !== true');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-ii-7.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-ii-7.js
new file mode 100644
index 0000000000..7f6039c2f4
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-ii-7.js
@@ -0,0 +1,34 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every - unhandled exceptions happened in
+    callbackfn terminate iteration
+---*/
+
+var called = 0;
+
+function callbackfn(val, idx, obj) {
+  called++;
+  if (called === 1) {
+    throw new Test262Error("Exception occurred in callbackfn");
+  }
+  return true;
+}
+
+var obj = {
+  0: 11,
+  4: 10,
+  10: 8,
+  length: 20
+};
+
+assert.throws(Test262Error, function() {
+  Array.prototype.every.call(obj, callbackfn);
+});
+
+assert.sameValue(called, 1, 'called');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-ii-8.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-ii-8.js
new file mode 100644
index 0000000000..3ca6cfa324
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-ii-8.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every - element changed by callbackfn on previous
+    iterations is observed
+---*/
+
+var obj = {
+  0: 11,
+  1: 12,
+  length: 2
+};
+
+function callbackfn(val, idx, o) {
+  if (idx === 0) {
+    obj[idx + 1] = 8;
+  }
+  return val > 10;
+}
+
+
+
+assert.sameValue(Array.prototype.every.call(obj, callbackfn), false, 'Array.prototype.every.call(obj, callbackfn)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-ii-9.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-ii-9.js
new file mode 100644
index 0000000000..e3f1679c60
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-ii-9.js
@@ -0,0 +1,21 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every - callbackfn is called with 0 formal
+    parameter
+---*/
+
+var called = 0;
+
+function callbackfn() {
+  called++;
+  return true;
+}
+
+assert([11, 12].every(callbackfn), '[11, 12].every(callbackfn) !== true');
+assert.sameValue(called, 2, 'called');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-iii-1.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-iii-1.js
new file mode 100644
index 0000000000..822414b772
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-iii-1.js
@@ -0,0 +1,25 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: Array.prototype.every - return value of callbackfn is undefined
+---*/
+
+var accessed = false;
+var obj = {
+  0: 11,
+  length: 1
+};
+
+function callbackfn(val, idx, o) {
+  accessed = true;
+  return undefined;
+}
+
+
+
+assert.sameValue(Array.prototype.every.call(obj, callbackfn), false, 'Array.prototype.every.call(obj, callbackfn)');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-iii-10.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-iii-10.js
new file mode 100644
index 0000000000..ddba79131b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-iii-10.js
@@ -0,0 +1,21 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every - return value of callbackfn is a number
+    (value is Infinity)
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return Infinity;
+}
+
+assert([11].every(callbackfn), '[11].every(callbackfn) !== true');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-iii-11.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-iii-11.js
new file mode 100644
index 0000000000..4e0da36fe9
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-iii-11.js
@@ -0,0 +1,21 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every - return value of callbackfn is a number
+    (value is -Infinity)
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return -Infinity;
+}
+
+assert([11].every(callbackfn), '[11].every(callbackfn) !== true');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-iii-12.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-iii-12.js
new file mode 100644
index 0000000000..3849133131
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-iii-12.js
@@ -0,0 +1,21 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every - return value of callbackfn is a number
+    (value is NaN)
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return NaN;
+}
+
+assert.sameValue([11].every(callbackfn), false, '[11].every(callbackfn)');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-iii-13.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-iii-13.js
new file mode 100644
index 0000000000..3edcf5499d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-iii-13.js
@@ -0,0 +1,21 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every - return value of callbackfn is an empty
+    string
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return "";
+}
+
+assert.sameValue([11].every(callbackfn), false, '[11].every(callbackfn)');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-iii-14.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-iii-14.js
new file mode 100644
index 0000000000..52a5f92bab
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-iii-14.js
@@ -0,0 +1,21 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every - return value of callbackfn is a non-empty
+    string
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return "non-empty string";
+}
+
+assert([11].every(callbackfn), '[11].every(callbackfn) !== true');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-iii-15.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-iii-15.js
new file mode 100644
index 0000000000..88c930c3bd
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-iii-15.js
@@ -0,0 +1,21 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every - return value of callbackfn is a Function
+    object
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return function() {};
+}
+
+assert([11].every(callbackfn), '[11].every(callbackfn) !== true');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-iii-16.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-iii-16.js
new file mode 100644
index 0000000000..94f14a52e2
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-iii-16.js
@@ -0,0 +1,21 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every - return value of callbackfn is an Array
+    object
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return [];
+}
+
+assert([11].every(callbackfn), '[11].every(callbackfn) !== true');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-iii-17.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-iii-17.js
new file mode 100644
index 0000000000..09bfc4a0f5
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-iii-17.js
@@ -0,0 +1,21 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every - return value of callbackfn is a String
+    object
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return new String();
+}
+
+assert([11].every(callbackfn), '[11].every(callbackfn) !== true');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-iii-18.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-iii-18.js
new file mode 100644
index 0000000000..5de172c4c0
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-iii-18.js
@@ -0,0 +1,21 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every - return value of callbackfn is a Boolean
+    object
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return new Boolean();
+}
+
+assert([11].every(callbackfn), '[11].every(callbackfn) !== true');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-iii-19.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-iii-19.js
new file mode 100644
index 0000000000..a53fff8bc0
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-iii-19.js
@@ -0,0 +1,21 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every - return value of callbackfn is a Number
+    object
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return new Number();
+}
+
+assert([11].every(callbackfn), '[11].every(callbackfn) !== true');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-iii-2.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-iii-2.js
new file mode 100644
index 0000000000..be850ac536
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-iii-2.js
@@ -0,0 +1,25 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: Array.prototype.every - return value of callbackfn is null
+---*/
+
+var accessed = false;
+var obj = {
+  0: 11,
+  length: 1
+};
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return null;
+}
+
+
+
+assert.sameValue(Array.prototype.every.call(obj, callbackfn), false, 'Array.prototype.every.call(obj, callbackfn)');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-iii-20.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-iii-20.js
new file mode 100644
index 0000000000..5f20d29720
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-iii-20.js
@@ -0,0 +1,21 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every - return value of callbackfn is the Math
+    object
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return Math;
+}
+
+assert([11].every(callbackfn), '[11].every(callbackfn) !== true');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-iii-21.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-iii-21.js
new file mode 100644
index 0000000000..6ce6fa52ef
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-iii-21.js
@@ -0,0 +1,19 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: Array.prototype.every - return value of callbackfn is a Date object
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return new Date();
+}
+
+assert([11].every(callbackfn), '[11].every(callbackfn) !== true');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-iii-22.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-iii-22.js
new file mode 100644
index 0000000000..3fd482cc75
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-iii-22.js
@@ -0,0 +1,21 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every - return value of callbackfn is a RegExp
+    object
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return new RegExp();
+}
+
+assert([11].every(callbackfn), '[11].every(callbackfn) !== true');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-iii-23.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-iii-23.js
new file mode 100644
index 0000000000..d18cf83cff
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-iii-23.js
@@ -0,0 +1,21 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every - return value of callbackfn is the JSON
+    object
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return JSON;
+}
+
+assert([11].every(callbackfn), '[11].every(callbackfn) !== true');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-iii-24.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-iii-24.js
new file mode 100644
index 0000000000..58cad1d777
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-iii-24.js
@@ -0,0 +1,21 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every - return value of callbackfn is an Error
+    object
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return new EvalError();
+}
+
+assert([11].every(callbackfn), '[11].every(callbackfn) !== true');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-iii-25.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-iii-25.js
new file mode 100644
index 0000000000..05680e0df5
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-iii-25.js
@@ -0,0 +1,21 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every - return value of callbackfn is the
+    Arguments object
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return arguments;
+}
+
+assert([11].every(callbackfn), '[11].every(callbackfn) !== true');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-iii-27.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-iii-27.js
new file mode 100644
index 0000000000..3985d330dd
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-iii-27.js
@@ -0,0 +1,22 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every - return value of callbackfn is the global
+    object
+---*/
+
+var global = this;
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return global;
+}
+
+assert([11].every(callbackfn), '[11].every(callbackfn) !== true');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-iii-28.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-iii-28.js
new file mode 100644
index 0000000000..f4fde7c5c2
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-iii-28.js
@@ -0,0 +1,46 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: Array.prototype.every - false prevents further side effects
+---*/
+
+var result = false;
+var obj = {
+  length: 20
+};
+
+function callbackfn(val, idx, obj) {
+  if (idx > 1) {
+    result = true;
+  }
+  return val > 10;
+}
+
+Object.defineProperty(obj, "0", {
+  get: function() {
+    return 11;
+  },
+  configurable: true
+});
+
+Object.defineProperty(obj, "1", {
+  get: function() {
+    return 8;
+  },
+  configurable: true
+});
+
+Object.defineProperty(obj, "2", {
+  get: function() {
+    result = true;
+    return 8;
+  },
+  configurable: true
+});
+
+assert.sameValue(Array.prototype.every.call(obj, callbackfn), false, 'Array.prototype.every.call(obj, callbackfn)');
+assert.sameValue(result, false, 'result');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-iii-29.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-iii-29.js
new file mode 100644
index 0000000000..77a3b0894f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-iii-29.js
@@ -0,0 +1,21 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every - return value (new Boolean(false)) of
+    callbackfn is treated as true value
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return new Boolean(false);
+}
+
+assert([11].every(callbackfn), '[11].every(callbackfn) !== true');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-iii-3.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-iii-3.js
new file mode 100644
index 0000000000..0a7c070b47
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-iii-3.js
@@ -0,0 +1,25 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every - return value of callbackfn is a boolean
+    (value is false)
+---*/
+
+var accessed = false;
+var obj = {
+  0: 11,
+  length: 1
+};
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return false;
+}
+
+assert.sameValue(Array.prototype.every.call(obj, callbackfn), false, 'Array.prototype.every.call(obj, callbackfn)');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-iii-4.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-iii-4.js
new file mode 100644
index 0000000000..8d090b844c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-iii-4.js
@@ -0,0 +1,27 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every - return value of callbackfn is a boolean
+    (value is true)
+---*/
+
+var accessed = false;
+var obj = {
+  0: 11,
+  length: 1
+};
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return true;
+}
+
+
+
+assert(Array.prototype.every.call(obj, callbackfn), 'Array.prototype.every.call(obj, callbackfn) !== true');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-iii-5.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-iii-5.js
new file mode 100644
index 0000000000..1560afa6e0
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-iii-5.js
@@ -0,0 +1,21 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every - return value of callbackfn is a number
+    (value is 0)
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return 0;
+}
+
+assert.sameValue([11].every(callbackfn), false, '[11].every(callbackfn)');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-iii-6.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-iii-6.js
new file mode 100644
index 0000000000..23eeb249b3
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-iii-6.js
@@ -0,0 +1,21 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every - return value of callbackfn is a number
+    (value is +0)
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return +0;
+}
+
+assert.sameValue([11].every(callbackfn), false, '[11].every(callbackfn)');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-iii-7.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-iii-7.js
new file mode 100644
index 0000000000..1dbb74c91b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-iii-7.js
@@ -0,0 +1,21 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every - return value of callbackfn is a nunmber
+    (value is -0)
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return -0;
+}
+
+assert.sameValue([11].every(callbackfn), false, '[11].every(callbackfn)');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-iii-8.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-iii-8.js
new file mode 100644
index 0000000000..9998803a04
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-iii-8.js
@@ -0,0 +1,21 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every - return value of callbackfn is a number
+    (value is positive number)
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return 5;
+}
+
+assert([11].every(callbackfn), '[11].every(callbackfn) !== true');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-iii-9.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-iii-9.js
new file mode 100644
index 0000000000..45731e95a5
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-7-c-iii-9.js
@@ -0,0 +1,21 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every - return value of callbackfn is a number
+    (value is negative number)
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return -5;
+}
+
+assert([11].every(callbackfn), '[11].every(callbackfn) !== true');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-8-1.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-8-1.js
new file mode 100644
index 0000000000..e21788de75
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-8-1.js
@@ -0,0 +1,14 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: Array.prototype.every returns true if 'length' is 0 (empty array)
+---*/
+
+function cb() {}
+var i = [].every(cb);
+
+assert.sameValue(i, true, 'i');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-8-10.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-8-10.js
new file mode 100644
index 0000000000..8be8730c95
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-8-10.js
@@ -0,0 +1,27 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: Array.prototype.every - subclassed array when length is reduced
+---*/
+
+foo.prototype = new Array(1, 2, 3);
+
+function foo() {}
+var f = new foo();
+f.length = 2;
+
+function cb(val)
+{
+  if (val > 2)
+    return false;
+  else
+    return true;
+}
+var i = f.every(cb);
+
+
+assert.sameValue(i, true, 'i');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-8-11.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-8-11.js
new file mode 100644
index 0000000000..0ffed8116e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-8-11.js
@@ -0,0 +1,25 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every returns true when all calls to callbackfn
+    return true
+---*/
+
+var callCnt = 0;
+
+function callbackfn(val, idx, obj)
+{
+  callCnt++;
+  return true;
+}
+
+var arr = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9];
+
+
+assert.sameValue(arr.every(callbackfn), true, 'arr.every(callbackfn)');
+assert.sameValue(callCnt, 10, 'callCnt');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-8-12.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-8-12.js
new file mode 100644
index 0000000000..f26076a8a5
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-8-12.js
@@ -0,0 +1,24 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every doesn't mutate the array on which it is
+    called on
+---*/
+
+function callbackfn(val, idx, obj)
+{
+  return true;
+}
+var arr = [1, 2, 3, 4, 5];
+arr.every(callbackfn);
+
+assert.sameValue(arr[0], 1, 'arr[0]');
+assert.sameValue(arr[1], 2, 'arr[1]');
+assert.sameValue(arr[2], 3, 'arr[2]');
+assert.sameValue(arr[3], 4, 'arr[3]');
+assert.sameValue(arr[4], 5, 'arr[4]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-8-13.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-8-13.js
new file mode 100644
index 0000000000..73ddb2f547
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-8-13.js
@@ -0,0 +1,25 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: Array.prototype.every doesn't visit expandos
+---*/
+
+var callCnt = 0;
+
+function callbackfn(val, idx, obj)
+{
+  callCnt++;
+  return true;
+}
+
+var arr = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9];
+arr["i"] = 10;
+arr[true] = 11;
+
+
+assert.sameValue(arr.every(callbackfn), true, 'arr.every(callbackfn)');
+assert.sameValue(callCnt, 10, 'callCnt');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-8-2.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-8-2.js
new file mode 100644
index 0000000000..cfceada732
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-8-2.js
@@ -0,0 +1,23 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every returns true if 'length' is 0 (subclassed
+    Array, length overridden to null (type conversion))
+---*/
+
+foo.prototype = new Array(1, 2, 3);
+
+function foo() {}
+var f = new foo();
+f.length = null;
+
+function cb() {}
+var i = f.every(cb);
+
+
+assert.sameValue(i, true, 'i');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-8-3.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-8-3.js
new file mode 100644
index 0000000000..0848d2a83c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-8-3.js
@@ -0,0 +1,23 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every returns true if 'length' is 0 (subclassed
+    Array, length overridden to false (type conversion))
+---*/
+
+foo.prototype = new Array(1, 2, 3);
+
+function foo() {}
+var f = new foo();
+f.length = false;
+
+function cb() {}
+var i = f.every(cb);
+
+
+assert.sameValue(i, true, 'i');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-8-4.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-8-4.js
new file mode 100644
index 0000000000..9e4d263ae7
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-8-4.js
@@ -0,0 +1,23 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every returns true if 'length' is 0 (subclassed
+    Array, length overridden to 0 (type conversion))
+---*/
+
+foo.prototype = new Array(1, 2, 3);
+
+function foo() {}
+var f = new foo();
+f.length = 0;
+
+function cb() {}
+var i = f.every(cb);
+
+
+assert.sameValue(i, true, 'i');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-8-5.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-8-5.js
new file mode 100644
index 0000000000..df0ff6b2d4
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-8-5.js
@@ -0,0 +1,23 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every returns true if 'length' is 0 (subclassed
+    Array, length overridden to '0' (type conversion))
+---*/
+
+foo.prototype = new Array(1, 2, 3);
+
+function foo() {}
+var f = new foo();
+f.length = '0';
+
+function cb() {}
+var i = f.every(cb);
+
+
+assert.sameValue(i, true, 'i');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-8-6.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-8-6.js
new file mode 100644
index 0000000000..2424224c4d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-8-6.js
@@ -0,0 +1,29 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every returns true if 'length' is 0 (subclassed
+    Array, length overridden with obj with valueOf)
+---*/
+
+foo.prototype = new Array(1, 2, 3);
+
+function foo() {}
+var f = new foo();
+
+var o = {
+  valueOf: function() {
+    return 0;
+  }
+};
+f.length = o;
+
+function cb() {}
+var i = f.every(cb);
+
+
+assert.sameValue(i, true, 'i');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-8-7.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-8-7.js
new file mode 100644
index 0000000000..72a6dc4569
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-8-7.js
@@ -0,0 +1,34 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every returns true if 'length' is 0 (subclassed
+    Array, length overridden with obj w/o valueOf (toString))
+---*/
+
+foo.prototype = new Array(1, 2, 3);
+
+function foo() {}
+var f = new foo();
+
+var o = {
+  toString: function() {
+    return '0';
+  }
+};
+f.length = o;
+
+// objects inherit the default valueOf method of the Object object;
+// that simply returns the itself. Since the default valueOf() method
+// does not return a primitive value, ES next tries to convert the object
+// to a number by calling its toString() method and converting the
+// resulting string to a number.
+function cb() {}
+var i = f.every(cb);
+
+
+assert.sameValue(i, true, 'i');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-8-8.js b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-8-8.js
new file mode 100644
index 0000000000..c888904a33
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/15.4.4.16-8-8.js
@@ -0,0 +1,38 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+    Array.prototype.every returns true if 'length' is 0 (subclassed
+    Array, length overridden with []
+---*/
+
+foo.prototype = new Array(1, 2, 3);
+
+function foo() {}
+var f = new foo();
+
+f.length = [];
+
+// objects inherit the default valueOf method of the Object object;
+// that simply returns the itself. Since the default valueOf() method
+// does not return a primitive value, ES next tries to convert the object
+// to a number by calling its toString() method and converting the
+// resulting string to a number.
+//
+// The toString( ) method on Array converts the array elements to strings,
+// then returns the result of concatenating these strings, with commas in
+// between. An array with no elements converts to the empty string, which
+// converts to the number 0. If an array has a single element that is a
+// number n, the array converts to a string representation of n, which is
+// then converted back to n itself. If an array contains more than one element,
+// or if its one element is not a number, the array converts to NaN.
+
+function cb() {}
+var i = f.every(cb);
+
+
+assert.sameValue(i, true, 'i');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/browser.js b/js/src/tests/test262/built-ins/Array/prototype/every/browser.js
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/call-with-boolean.js b/js/src/tests/test262/built-ins/Array/prototype/every/call-with-boolean.js
new file mode 100644
index 0000000000..76e4bab1a7
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/call-with-boolean.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2020 Rick Waldron.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: Array.prototype.every applied to boolean primitive
+---*/
+
+assert.sameValue(
+  Array.prototype.every.call(true, () => {}),
+  true,
+  'Array.prototype.every.call(true, () => {}) must return true'
+);
+assert.sameValue(
+  Array.prototype.every.call(false, () => {}),
+  true,
+  'Array.prototype.every.call(false, () => {}) must return true'
+);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/callbackfn-resize-arraybuffer.js b/js/src/tests/test262/built-ins/Array/prototype/every/callbackfn-resize-arraybuffer.js
new file mode 100644
index 0000000000..a1a4ee5456
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/callbackfn-resize-arraybuffer.js
@@ -0,0 +1,74 @@
+// |reftest| shell-option(--enable-arraybuffer-resizable) skip-if(!ArrayBuffer.prototype.resize||!xulRuntime.shell) -- resizable-arraybuffer is not enabled unconditionally, requires shell-options
+// Copyright (C) 2021 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.every
+description: TypedArray instance buffer can be resized during iteration
+includes: [testTypedArray.js, compareArray.js]
+features: [TypedArray, resizable-arraybuffer]
+---*/
+
+// If the host chooses to throw as allowed by the specification, the observed
+// behavior will be identical to the case where `ArrayBuffer.prototype.resize`
+// has not been implemented. The following assertion prevents this test from
+// passing in runtimes which have not implemented the method.
+assert.sameValue(typeof ArrayBuffer.prototype.resize, 'function');
+
+testWithTypedArrayConstructors(function(TA) {
+  var BPE = TA.BYTES_PER_ELEMENT;
+  var buffer = new ArrayBuffer(BPE * 3, {maxByteLength: BPE * 4});
+  var sample = new TA(buffer);
+  var expectedElements, expectedIndices, expectedArrays;
+  var elements, indices, arrays, result;
+
+  elements = [];
+  indices = [];
+  arrays = [];
+  result = Array.prototype.every.call(sample, function(element, index, array) {
+    if (elements.length === 0) {
+      try {
+        buffer.resize(2 * BPE);
+        expectedElements = [0, 0];
+        expectedIndices = [0, 1];
+        expectedArrays = [sample, sample];
+      } catch (_) {
+        expectedElements = [0, 0, 0];
+        expectedIndices = [0, 1, 2];
+        expectedArrays = [sample, sample, sample];
+      }
+    }
+
+    elements.push(element);
+    indices.push(index);
+    arrays.push(array);
+    return true;
+  });
+
+  assert.compareArray(elements, expectedElements, 'elements (shrink)');
+  assert.compareArray(indices, expectedIndices, 'indices (shrink)');
+  assert.compareArray(arrays, expectedArrays, 'arrays (shrink)');
+  assert.sameValue(result, true, 'result (shrink)');
+
+  elements = [];
+  indices = [];
+  arrays = [];
+  result = Array.prototype.every.call(sample, function(element, index, array) {
+    if (elements.length === 0) {
+      try {
+        buffer.resize(4 * BPE);
+      } catch (_) {}
+    }
+
+    elements.push(element);
+    indices.push(index);
+    arrays.push(array);
+    return true;
+  });
+
+  assert.compareArray(elements, expectedElements, 'elements (grow)');
+  assert.compareArray(indices, expectedIndices, 'indices (grow)');
+  assert.compareArray(arrays, expectedArrays, 'arrays (grow)');
+  assert.sameValue(result, true, 'result (grow)');
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/length.js b/js/src/tests/test262/built-ins/Array/prototype/every/length.js
new file mode 100644
index 0000000000..65015d9799
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/length.js
@@ -0,0 +1,23 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// Copyright (C) 2017 Corey Frang. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.every
+description: >
+  Array.prototype.every.length value and property descriptor
+info: |
+  Array.prototype.every ( callbackfn [ , thisArg] )
+  The length property of the of function is 1.
+includes: [propertyHelper.js]
+---*/
+
+assert.sameValue(
+  Array.prototype.every.length, 1,
+  'The value of `Array.prototype.every.length` is `1`'
+);
+
+verifyNotEnumerable(Array.prototype.every, 'length');
+verifyNotWritable(Array.prototype.every, 'length');
+verifyConfigurable(Array.prototype.every, 'length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/name.js b/js/src/tests/test262/built-ins/Array/prototype/every/name.js
new file mode 100644
index 0000000000..5bb10976b6
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/name.js
@@ -0,0 +1,28 @@
+// Copyright (C) 2015 André Bargull. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+  Array.prototype.every.name is "every".
+info: |
+  Array.prototype.every ( callbackfn [ , thisArg] )
+
+  17 ECMAScript Standard Built-in Objects:
+    Every built-in Function object, including constructors, that is not
+    identified as an anonymous function has a name property whose value
+    is a String.
+
+    Unless otherwise specified, the name property of a built-in Function
+    object, if it exists, has the attributes { [[Writable]]: false,
+    [[Enumerable]]: false, [[Configurable]]: true }.
+includes: [propertyHelper.js]
+---*/
+
+assert.sameValue(Array.prototype.every.name, "every");
+
+verifyNotEnumerable(Array.prototype.every, "name");
+verifyNotWritable(Array.prototype.every, "name");
+verifyConfigurable(Array.prototype.every, "name");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/not-a-constructor.js b/js/src/tests/test262/built-ins/Array/prototype/every/not-a-constructor.js
new file mode 100644
index 0000000000..54dee55e8b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/not-a-constructor.js
@@ -0,0 +1,35 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Array.prototype.every does not implement [[Construct]], is not new-able
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+
+  sec-evaluatenew
+
+  ...
+  7. If IsConstructor(constructor) is false, throw a TypeError exception.
+  ...
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Array.prototype.every),
+  false,
+  'isConstructor(Array.prototype.every) must return false'
+);
+
+assert.throws(TypeError, () => {
+  new Array.prototype.every(() => {});
+}, '`new Array.prototype.every(() => {})` throws TypeError');
+
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/prop-desc.js b/js/src/tests/test262/built-ins/Array/prototype/every/prop-desc.js
new file mode 100644
index 0000000000..1bc9174eef
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/prop-desc.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2017 Leo Balter. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.every
+description: >
+  "every" property of Array.prototype
+info: |
+  17 ECMAScript Standard Built-in Objects
+  
+  Every other data property described in clauses 18 through 26 and in Annex B.2
+  has the attributes { [[Writable]]: true, [[Enumerable]]: false,
+    [[Configurable]]: true } unless otherwise specified.
+includes: [propertyHelper.js]
+---*/
+
+assert.sameValue(typeof Array.prototype.every, 'function', 'typeof');
+
+verifyNotEnumerable(Array.prototype, "every");
+verifyWritable(Array.prototype, "every");
+verifyConfigurable(Array.prototype, "every");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/every/shell.js b/js/src/tests/test262/built-ins/Array/prototype/every/shell.js
new file mode 100644
index 0000000000..05fecd6ef1
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/every/shell.js
@@ -0,0 +1,161 @@
+// GENERATED, DO NOT EDIT
+// file: testTypedArray.js
+// Copyright (C) 2015 André Bargull. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+description: |
+    Collection of functions used to assert the correctness of TypedArray objects.
+defines:
+  - floatArrayConstructors
+  - nonClampedIntArrayConstructors
+  - intArrayConstructors
+  - typedArrayConstructors
+  - TypedArray
+  - testWithTypedArrayConstructors
+  - nonAtomicsFriendlyTypedArrayConstructors
+  - testWithAtomicsFriendlyTypedArrayConstructors
+  - testWithNonAtomicsFriendlyTypedArrayConstructors
+  - testTypedArrayConversions
+---*/
+
+var floatArrayConstructors = [
+  Float64Array,
+  Float32Array
+];
+
+var nonClampedIntArrayConstructors = [
+  Int32Array,
+  Int16Array,
+  Int8Array,
+  Uint32Array,
+  Uint16Array,
+  Uint8Array
+];
+
+var intArrayConstructors = nonClampedIntArrayConstructors.concat([Uint8ClampedArray]);
+
+// Float16Array is a newer feature
+// adding it to this list unconditionally would cause implementations lacking it to fail every test which uses it
+if (typeof Float16Array !== 'undefined') {
+  floatArrayConstructors.push(Float16Array);
+}
+
+/**
+ * Array containing every non-bigint typed array constructor.
+ */
+
+var typedArrayConstructors = floatArrayConstructors.concat(intArrayConstructors);
+
+/**
+ * The %TypedArray% intrinsic constructor function.
+ */
+var TypedArray = Object.getPrototypeOf(Int8Array);
+
+/**
+ * Callback for testing a typed array constructor.
+ *
+ * @callback typedArrayConstructorCallback
+ * @param {Function} Constructor the constructor object to test with.
+ */
+
+/**
+ * Calls the provided function for every typed array constructor.
+ *
+ * @param {typedArrayConstructorCallback} f - the function to call for each typed array constructor.
+ * @param {Array} selected - An optional Array with filtered typed arrays
+ */
+function testWithTypedArrayConstructors(f, selected) {
+  var constructors = selected || typedArrayConstructors;
+  for (var i = 0; i < constructors.length; ++i) {
+    var constructor = constructors[i];
+    try {
+      f(constructor);
+    } catch (e) {
+      e.message += " (Testing with " + constructor.name + ".)";
+      throw e;
+    }
+  }
+}
+
+var nonAtomicsFriendlyTypedArrayConstructors = floatArrayConstructors.concat([Uint8ClampedArray]);
+/**
+ * Calls the provided function for every non-"Atomics Friendly" typed array constructor.
+ *
+ * @param {typedArrayConstructorCallback} f - the function to call for each typed array constructor.
+ * @param {Array} selected - An optional Array with filtered typed arrays
+ */
+function testWithNonAtomicsFriendlyTypedArrayConstructors(f) {
+  testWithTypedArrayConstructors(f, nonAtomicsFriendlyTypedArrayConstructors);
+}
+
+/**
+ * Calls the provided function for every "Atomics Friendly" typed array constructor.
+ *
+ * @param {typedArrayConstructorCallback} f - the function to call for each typed array constructor.
+ * @param {Array} selected - An optional Array with filtered typed arrays
+ */
+function testWithAtomicsFriendlyTypedArrayConstructors(f) {
+  testWithTypedArrayConstructors(f, [
+    Int32Array,
+    Int16Array,
+    Int8Array,
+    Uint32Array,
+    Uint16Array,
+    Uint8Array,
+  ]);
+}
+
+/**
+ * Helper for conversion operations on TypedArrays, the expected values
+ * properties are indexed in order to match the respective value for each
+ * TypedArray constructor
+ * @param  {Function} fn - the function to call for each constructor and value.
+ *                         will be called with the constructor, value, expected
+ *                         value, and a initial value that can be used to avoid
+ *                         a false positive with an equivalent expected value.
+ */
+function testTypedArrayConversions(byteConversionValues, fn) {
+  var values = byteConversionValues.values;
+  var expected = byteConversionValues.expected;
+
+  testWithTypedArrayConstructors(function(TA) {
+    var name = TA.name.slice(0, -5);
+
+    return values.forEach(function(value, index) {
+      var exp = expected[name][index];
+      var initial = 0;
+      if (exp === 0) {
+        initial = 1;
+      }
+      fn(TA, value, exp, initial);
+    });
+  });
+}
+
+/**
+ * Checks if the given argument is one of the float-based TypedArray constructors.
+ *
+ * @param {constructor} ctor - the value to check
+ * @returns {boolean}
+ */
+function isFloatTypedArrayConstructor(arg) {
+  return floatArrayConstructors.indexOf(arg) !== -1;
+}
+
+/**
+ * Determines the precision of the given float-based TypedArray constructor.
+ *
+ * @param {constructor} ctor - the value to check
+ * @returns {string} "half", "single", or "double" for Float16Array, Float32Array, and Float64Array respectively.
+ */
+function floatTypedArrayConstructorPrecision(FA) {
+  if (typeof Float16Array !== "undefined" && FA === Float16Array) {
+    return "half";
+  } else if (FA === Float32Array) {
+    return "single";
+  } else if (FA === Float64Array) {
+    return "double";
+  } else {
+    throw new Error("Malformed test - floatTypedArrayConstructorPrecision called with non-float TypedArray");
+  }
+}
diff --git a/js/src/tests/test262/built-ins/Array/prototype/exotic-array.js b/js/src/tests/test262/built-ins/Array/prototype/exotic-array.js
new file mode 100644
index 0000000000..b1ab60ace7
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/exotic-array.js
@@ -0,0 +1,26 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// Copyright (C) 2017 Leo Balter. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-properties-of-the-array-prototype-object
+description: >
+  Array.prototype is an exoctic array object
+info: |
+  22.1.3 Properties of the Array Prototype Object
+
+  (...)
+  The Array prototype object is an Array exotic object and has the internal
+  methods specified for such objects.
+---*/
+
+Array.prototype[2] = 42;
+
+assert.sameValue(Array.prototype.length, 3);
+assert.sameValue(Array.prototype[0], undefined, 'Array.prototype[0]');
+assert.sameValue(Array.prototype[1], undefined, 'Array.prototype[1]');
+assert.sameValue(Array.prototype[2], 42, 'Array.prototype[2]');
+
+assert.sameValue({}.toString.call(Array.prototype), '[object Array]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/fill/browser.js b/js/src/tests/test262/built-ins/Array/prototype/fill/browser.js
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/js/src/tests/test262/built-ins/Array/prototype/fill/call-with-boolean.js b/js/src/tests/test262/built-ins/Array/prototype/fill/call-with-boolean.js
new file mode 100644
index 0000000000..0796174edd
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/fill/call-with-boolean.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2020 Rick Waldron.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.fill
+description: Array.prototype.fill applied to boolean primitive
+---*/
+
+assert.sameValue(
+  Array.prototype.fill.call(true) instanceof Boolean,
+  true,
+  'The result of `(Array.prototype.fill.call(true) instanceof Boolean)` is true'
+);
+assert.sameValue(
+  Array.prototype.fill.call(false) instanceof Boolean,
+  true,
+  'The result of `(Array.prototype.fill.call(false) instanceof Boolean)` is true'
+);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/fill/coerced-indexes.js b/js/src/tests/test262/built-ins/Array/prototype/fill/coerced-indexes.js
new file mode 100644
index 0000000000..3cf5954171
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/fill/coerced-indexes.js
@@ -0,0 +1,77 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.fill
+description: >
+  Fills elements from coerced to Integer `start` and `end` values
+info: |
+  22.1.3.6 Array.prototype.fill (value [ , start [ , end ] ] )
+
+  ...
+  7. Let relativeStart be ToInteger(start).
+  8. ReturnIfAbrupt(relativeStart).
+  9. If relativeStart < 0, let k be max((len + relativeStart),0); else let k be
+  min(relativeStart, len).
+  10. If end is undefined, let relativeEnd be len; else let relativeEnd be
+  ToInteger(end).
+  ...
+includes: [compareArray.js]
+---*/
+
+assert.compareArray([0, 0].fill(1, undefined), [1, 1],
+  '[0, 0].fill(1, undefined) must return [1, 1]'
+);
+
+assert.compareArray([0, 0].fill(1, 0, undefined), [1, 1],
+  '[0, 0].fill(1, 0, undefined) must return [1, 1]'
+);
+
+assert.compareArray([0, 0].fill(1, null), [1, 1],
+  '[0, 0].fill(1, null) must return [1, 1]'
+);
+
+assert.compareArray([0, 0].fill(1, 0, null), [0, 0],
+  '[0, 0].fill(1, 0, null) must return [0, 0]'
+);
+
+assert.compareArray([0, 0].fill(1, true), [0, 1],
+  '[0, 0].fill(1, true) must return [0, 1]'
+);
+
+assert.compareArray([0, 0].fill(1, 0, true), [1, 0],
+  '[0, 0].fill(1, 0, true) must return [1, 0]'
+);
+
+assert.compareArray([0, 0].fill(1, false), [1, 1],
+  '[0, 0].fill(1, false) must return [1, 1]'
+);
+
+assert.compareArray([0, 0].fill(1, 0, false), [0, 0],
+  '[0, 0].fill(1, 0, false) must return [0, 0]'
+);
+
+assert.compareArray([0, 0].fill(1, NaN), [1, 1],
+  '[0, 0].fill(1, NaN) must return [1, 1]'
+);
+
+assert.compareArray([0, 0].fill(1, 0, NaN), [0, 0],
+  '[0, 0].fill(1, 0, NaN) must return [0, 0]'
+);
+
+assert.compareArray([0, 0].fill(1, '1'), [0, 1],
+  '[0, 0].fill(1, "1") must return [0, 1]'
+);
+
+assert.compareArray([0, 0].fill(1, 0, '1'), [1, 0],
+  '[0, 0].fill(1, 0, "1") must return [1, 0]'
+);
+
+assert.compareArray([0, 0].fill(1, 1.5), [0, 1],
+  '[0, 0].fill(1, 1.5) must return [0, 1]'
+);
+
+assert.compareArray([0, 0].fill(1, 0, 1.5), [1, 0],
+  '[0, 0].fill(1, 0, 1.5) must return [1, 0]'
+);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/fill/fill-values-custom-start-and-end.js b/js/src/tests/test262/built-ins/Array/prototype/fill/fill-values-custom-start-and-end.js
new file mode 100644
index 0000000000..5eeedcfc92
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/fill/fill-values-custom-start-and-end.js
@@ -0,0 +1,40 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.fill
+description: >
+  Fills all the elements from a with a custom start and end indexes.
+info: |
+  22.1.3.6 Array.prototype.fill (value [ , start [ , end ] ] )
+
+  ...
+  7. If relativeStart < 0, let k be max((len + relativeStart),0); else let k be
+  min(relativeStart, len).
+  8. If end is undefined, let relativeEnd be len; else let relativeEnd be
+  ToInteger(end).
+  9. ReturnIfAbrupt(relativeEnd).
+  10. If relativeEnd < 0, let final be max((len + relativeEnd),0); else let
+  final be min(relativeEnd, len).
+  ...
+includes: [compareArray.js]
+---*/
+
+assert.compareArray([0, 0, 0].fill(8, 1, 2), [0, 8, 0], '[0, 0, 0].fill(8, 1, 2) must return [0, 8, 0]');
+assert.compareArray(
+  [0, 0, 0, 0, 0].fill(8, -3, 4),
+  [0, 0, 8, 8, 0],
+  '[0, 0, 0, 0, 0].fill(8, -3, 4) must return [0, 0, 8, 8, 0]'
+);
+assert.compareArray(
+  [0, 0, 0, 0, 0].fill(8, -2, -1),
+  [0, 0, 0, 8, 0],
+  '[0, 0, 0, 0, 0].fill(8, -2, -1) must return [0, 0, 0, 8, 0]'
+);
+assert.compareArray(
+  [0, 0, 0, 0, 0].fill(8, -1, -3),
+  [0, 0, 0, 0, 0],
+  '[0, 0, 0, 0, 0].fill(8, -1, -3) must return [0, 0, 0, 0, 0]'
+);
+assert.compareArray([, , , , 0].fill(8, 1, 3), [, 8, 8, , 0], '[, , , , 0].fill(8, 1, 3) must return [, 8, 8, , 0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/fill/fill-values-relative-end.js b/js/src/tests/test262/built-ins/Array/prototype/fill/fill-values-relative-end.js
new file mode 100644
index 0000000000..078c8b6574
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/fill/fill-values-relative-end.js
@@ -0,0 +1,32 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.fill
+description: >
+  Fills all the elements from a with a custom start index.
+info: |
+  22.1.3.6 Array.prototype.fill (value [ , start [ , end ] ] )
+
+  ...
+  8. If end is undefined, let relativeEnd be len; else let relativeEnd be
+  ToInteger(end).
+  9. ReturnIfAbrupt(relativeEnd).
+  10. If relativeEnd < 0, let final be max((len + relativeEnd),0); else let
+  final be min(relativeEnd, len).
+  ...
+includes: [compareArray.js]
+---*/
+
+assert.compareArray([0, 0, 0].fill(8, 0, 1), [8, 0, 0],
+  '[0, 0, 0].fill(8, 0, 1) must return [8, 0, 0]'
+);
+
+assert.compareArray([0, 0, 0].fill(8, 0, -1), [8, 8, 0],
+  '[0, 0, 0].fill(8, 0, -1) must return [8, 8, 0]'
+);
+
+assert.compareArray([0, 0, 0].fill(8, 0, 5), [8, 8, 8],
+  '[0, 0, 0].fill(8, 0, 5) must return [8, 8, 8]'
+);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/fill/fill-values-relative-start.js b/js/src/tests/test262/built-ins/Array/prototype/fill/fill-values-relative-start.js
new file mode 100644
index 0000000000..da7aa5f642
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/fill/fill-values-relative-start.js
@@ -0,0 +1,29 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.fill
+description: >
+  Fills all the elements from a with a custom start index.
+info: |
+  22.1.3.6 Array.prototype.fill (value [ , start [ , end ] ] )
+
+  ...
+  7. If relativeStart < 0, let k be max((len + relativeStart),0); else let k be
+  min(relativeStart, len).
+  ...
+includes: [compareArray.js]
+---*/
+
+assert.compareArray([0, 0, 0].fill(8, 1), [0, 8, 8],
+  '[0, 0, 0].fill(8, 1) must return [0, 8, 8]'
+);
+
+assert.compareArray([0, 0, 0].fill(8, 4), [0, 0, 0],
+  '[0, 0, 0].fill(8, 4) must return [0, 0, 0]'
+);
+
+assert.compareArray([0, 0, 0].fill(8, -1), [0, 0, 8],
+  '[0, 0, 0].fill(8, -1) must return [0, 0, 8]'
+);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/fill/fill-values.js b/js/src/tests/test262/built-ins/Array/prototype/fill/fill-values.js
new file mode 100644
index 0000000000..124da418f0
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/fill/fill-values.js
@@ -0,0 +1,35 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.fill
+description: >
+  Fills all the elements with `value` from a defaul start and index.
+info: |
+  22.1.3.6 Array.prototype.fill (value [ , start [ , end ] ] )
+
+  ...
+  7. If relativeStart < 0, let k be max((len + relativeStart),0); else let k be
+  min(relativeStart, len).
+  8. If end is undefined, let relativeEnd be len; else let relativeEnd be
+  ToInteger(end).
+  9. ReturnIfAbrupt(relativeEnd).
+  10. If relativeEnd < 0, let final be max((len + relativeEnd),0); else let
+  final be min(relativeEnd, len).
+  11. Repeat, while k < final
+    a. Let Pk be ToString(k).
+    b. Let setStatus be Set(O, Pk, value, true).
+    c. ReturnIfAbrupt(setStatus).
+    d. Increase k by 1.
+  12. Return O.
+includes: [compareArray.js]
+---*/
+
+assert.compareArray([].fill(8), [], '[].fill(8) must return []');
+
+assert.compareArray([0, 0].fill(), [undefined, undefined], '[0, 0].fill() must return [undefined, undefined]');
+
+assert.compareArray([0, 0, 0].fill(8), [8, 8, 8],
+  '[0, 0, 0].fill(8) must return [8, 8, 8]'
+);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/fill/length-near-integer-limit.js b/js/src/tests/test262/built-ins/Array/prototype/fill/length-near-integer-limit.js
new file mode 100644
index 0000000000..413175dcfb
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/fill/length-near-integer-limit.js
@@ -0,0 +1,33 @@
+// Copyright (C) 2020 Alexey Shvayka. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.fill
+description: >
+  Elements are filled in an array-like object
+  whose "length" property is near the integer limit.
+info: |
+  Array.prototype.fill ( value [ , start [ , end ] ] )
+
+  1. Let O be ? ToObject(this value).
+  2. Let len be ? LengthOfArrayLike(O).
+  [...]
+  7. Repeat, while k < final
+    a. Let Pk be ! ToString(k).
+    b. Perform ? Set(O, Pk, value, true).
+    [...]
+---*/
+
+var value = {};
+var startIndex = Number.MAX_SAFE_INTEGER - 3;
+var arrayLike = {
+  length: Number.MAX_SAFE_INTEGER,
+};
+
+Array.prototype.fill.call(arrayLike, value, startIndex, startIndex + 3);
+
+assert.sameValue(arrayLike[startIndex], value);
+assert.sameValue(arrayLike[startIndex + 1], value);
+assert.sameValue(arrayLike[startIndex + 2], value);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/fill/length.js b/js/src/tests/test262/built-ins/Array/prototype/fill/length.js
new file mode 100644
index 0000000000..1d12345bc0
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/fill/length.js
@@ -0,0 +1,20 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.fill
+description: Array.prototype.fill.length value and descriptor.
+info: |
+  17 ECMAScript Standard Built-in Objects
+includes: [propertyHelper.js]
+---*/
+
+assert.sameValue(
+  Array.prototype.fill.length, 1,
+  'The value of `Array.prototype.fill.length` is `1`'
+);
+
+verifyNotEnumerable(Array.prototype.fill, 'length');
+verifyNotWritable(Array.prototype.fill, 'length');
+verifyConfigurable(Array.prototype.fill, 'length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/fill/name.js b/js/src/tests/test262/built-ins/Array/prototype/fill/name.js
new file mode 100644
index 0000000000..35d210dec3
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/fill/name.js
@@ -0,0 +1,24 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.fill
+description: >
+  Array.prototype.fill.name value and descriptor.
+info: |
+  22.1.3.6 Array.prototype.fill (value [ , start [ , end ] ] )
+
+  17 ECMAScript Standard Built-in Objects
+
+includes: [propertyHelper.js]
+---*/
+
+assert.sameValue(
+  Array.prototype.fill.name, 'fill',
+  'The value of `Array.prototype.fill.name` is `"fill"`'
+);
+
+verifyNotEnumerable(Array.prototype.fill, 'name');
+verifyNotWritable(Array.prototype.fill, 'name');
+verifyConfigurable(Array.prototype.fill, 'name');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/fill/not-a-constructor.js b/js/src/tests/test262/built-ins/Array/prototype/fill/not-a-constructor.js
new file mode 100644
index 0000000000..77d1be633b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/fill/not-a-constructor.js
@@ -0,0 +1,31 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Array.prototype.fill does not implement [[Construct]], is not new-able
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+
+  sec-evaluatenew
+
+  ...
+  7. If IsConstructor(constructor) is false, throw a TypeError exception.
+  ...
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(isConstructor(Array.prototype.fill), false, 'isConstructor(Array.prototype.fill) must return false');
+
+assert.throws(TypeError, () => {
+  new Array.prototype.fill();
+}, '`new Array.prototype.fill()` throws TypeError');
+
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/fill/prop-desc.js b/js/src/tests/test262/built-ins/Array/prototype/fill/prop-desc.js
new file mode 100644
index 0000000000..bd0d1314ea
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/fill/prop-desc.js
@@ -0,0 +1,21 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.fill
+description: Property type and descriptor.
+info: |
+  17 ECMAScript Standard Built-in Objects
+includes: [propertyHelper.js]
+---*/
+
+assert.sameValue(
+  typeof Array.prototype.fill,
+  'function',
+  '`typeof Array.prototype.fill` is `function`'
+);
+
+verifyNotEnumerable(Array.prototype, 'fill');
+verifyWritable(Array.prototype, 'fill');
+verifyConfigurable(Array.prototype, 'fill');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/fill/return-abrupt-from-end-as-symbol.js b/js/src/tests/test262/built-ins/Array/prototype/fill/return-abrupt-from-end-as-symbol.js
new file mode 100644
index 0000000000..c6976b08a9
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/fill/return-abrupt-from-end-as-symbol.js
@@ -0,0 +1,24 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.fill
+description: >
+  Return abrupt from ToInteger(end) as a Symbol.
+info: |
+  22.1.3.6 Array.prototype.fill (value [ , start [ , end ] ] )
+
+  ...
+  8. If end is undefined, let relativeEnd be len; else let relativeEnd be
+  ToInteger(end).
+  9. ReturnIfAbrupt(relativeEnd).
+  ...
+features: [Symbol]
+---*/
+
+var end = Symbol(1);
+
+assert.throws(TypeError, function() {
+  [].fill(1, 0, end);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/fill/return-abrupt-from-end.js b/js/src/tests/test262/built-ins/Array/prototype/fill/return-abrupt-from-end.js
new file mode 100644
index 0000000000..644b5fb097
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/fill/return-abrupt-from-end.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.fill
+description: >
+  Return abrupt from ToInteger(end).
+info: |
+  22.1.3.6 Array.prototype.fill (value [ , start [ , end ] ] )
+
+  ...
+  8. If end is undefined, let relativeEnd be len; else let relativeEnd be
+  ToInteger(end).
+  9. ReturnIfAbrupt(relativeEnd).
+  ...
+---*/
+
+var end = {
+  valueOf: function() {
+    throw new Test262Error();
+  }
+};
+
+assert.throws(Test262Error, function() {
+  [].fill(1, 0, end);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/fill/return-abrupt-from-setting-property-value.js b/js/src/tests/test262/built-ins/Array/prototype/fill/return-abrupt-from-setting-property-value.js
new file mode 100644
index 0000000000..bbd439ffae
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/fill/return-abrupt-from-setting-property-value.js
@@ -0,0 +1,36 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.fill
+description: >
+  Return abrupt from setting a property value.
+info: |
+  22.1.3.6 Array.prototype.fill (value [ , start [ , end ] ] )
+
+  ...
+  11. Repeat, while k < final
+    a. Let Pk be ToString(k).
+    b. Let setStatus be Set(O, Pk, value, true).
+    c. ReturnIfAbrupt(setStatus).
+  ...
+---*/
+
+var a1 = [];
+Object.freeze(a1);
+
+// won't break on an empty array.
+a1.fill(1);
+
+var a2 = {
+  length: 1
+};
+Object.defineProperty(a2, '0', {
+  set: function() {
+    throw new Test262Error();
+  }
+})
+assert.throws(Test262Error, function() {
+  Array.prototype.fill.call(a2);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/fill/return-abrupt-from-start-as-symbol.js b/js/src/tests/test262/built-ins/Array/prototype/fill/return-abrupt-from-start-as-symbol.js
new file mode 100644
index 0000000000..572486c7f4
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/fill/return-abrupt-from-start-as-symbol.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.fill
+description: >
+  Return abrupt from ToInteger(start) as a Symbol.
+info: |
+  22.1.3.6 Array.prototype.fill (value [ , start [ , end ] ] )
+
+  ...
+  5. Let relativeStart be ToInteger(start).
+  6. ReturnIfAbrupt(relativeStart).
+  ...
+features: [Symbol]
+---*/
+
+var start = Symbol(1);
+
+assert.throws(TypeError, function() {
+  [].fill(1, start);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/fill/return-abrupt-from-start.js b/js/src/tests/test262/built-ins/Array/prototype/fill/return-abrupt-from-start.js
new file mode 100644
index 0000000000..326c9a9009
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/fill/return-abrupt-from-start.js
@@ -0,0 +1,26 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.fill
+description: >
+  Return abrupt from ToInteger(start).
+info: |
+  22.1.3.6 Array.prototype.fill (value [ , start [ , end ] ] )
+
+  ...
+  5. Let relativeStart be ToInteger(start).
+  6. ReturnIfAbrupt(relativeStart).
+  ...
+---*/
+
+var start = {
+  valueOf: function() {
+    throw new Test262Error();
+  }
+};
+
+assert.throws(Test262Error, function() {
+  [].fill(1, start);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/fill/return-abrupt-from-this-length-as-symbol.js b/js/src/tests/test262/built-ins/Array/prototype/fill/return-abrupt-from-this-length-as-symbol.js
new file mode 100644
index 0000000000..5fe17d264e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/fill/return-abrupt-from-this-length-as-symbol.js
@@ -0,0 +1,26 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.fill
+description: >
+  Return abrupt from ToLength(Get(O, "length")) where length is a Symbol.
+info: |
+  22.1.3.6 Array.prototype.fill (value [ , start [ , end ] ] )
+
+  1. Let O be ToObject(this value).
+  2. ReturnIfAbrupt(O).
+  3. Let len be ToLength(Get(O, "length")).
+  4. ReturnIfAbrupt(len).
+features: [Symbol]
+---*/
+
+var o = {};
+
+o.length = Symbol(1);
+
+// value argument is given to avoid false positives
+assert.throws(TypeError, function() {
+  [].fill.call(o, 1);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/fill/return-abrupt-from-this-length.js b/js/src/tests/test262/built-ins/Array/prototype/fill/return-abrupt-from-this-length.js
new file mode 100644
index 0000000000..c4d7384549
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/fill/return-abrupt-from-this-length.js
@@ -0,0 +1,39 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.fill
+description: >
+  Return abrupt from ToLength(Get(O, "length")).
+info: |
+  22.1.3.6 Array.prototype.fill (value [ , start [ , end ] ] )
+
+  1. Let O be ToObject(this value).
+  2. ReturnIfAbrupt(O).
+  3. Let len be ToLength(Get(O, "length")).
+  4. ReturnIfAbrupt(len).
+---*/
+
+var o1 = {};
+
+Object.defineProperty(o1, 'length', {
+  get: function() {
+    throw new Test262Error();
+  },
+  configurable: true
+});
+assert.throws(Test262Error, function() {
+  [].fill.call(o1, 1);
+});
+
+var o2 = {
+  length: {
+    valueOf: function() {
+      throw new Test262Error();
+    }
+  }
+};
+assert.throws(Test262Error, function() {
+  [].fill.call(o2, 1);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/fill/return-abrupt-from-this.js b/js/src/tests/test262/built-ins/Array/prototype/fill/return-abrupt-from-this.js
new file mode 100644
index 0000000000..5f3f7294d8
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/fill/return-abrupt-from-this.js
@@ -0,0 +1,22 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.fill
+description: >
+  Return abrupt from ToObject(this value).
+info: |
+  22.1.3.6 Array.prototype.fill (value [ , start [ , end ] ] )
+
+  1. Let O be ToObject(this value).
+  2. ReturnIfAbrupt(O).
+---*/
+
+assert.throws(TypeError, function() {
+  Array.prototype.fill.call(undefined, 1);
+});
+
+assert.throws(TypeError, function() {
+  Array.prototype.fill.call(null, 1);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/fill/return-this.js b/js/src/tests/test262/built-ins/Array/prototype/fill/return-this.js
new file mode 100644
index 0000000000..40c4389738
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/fill/return-this.js
@@ -0,0 +1,22 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.fill
+description: >
+  Returns `this`.
+info: |
+  12. Return O.
+---*/
+
+var arr = [];
+var result = arr.fill(1);
+
+assert.sameValue(result, arr);
+
+var o = {
+  length: 0
+};
+result = Array.prototype.fill.call(o);
+assert.sameValue(result, o);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/fill/shell.js b/js/src/tests/test262/built-ins/Array/prototype/fill/shell.js
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-1-1.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-1-1.js
new file mode 100644
index 0000000000..353a38d2bc
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-1-1.js
@@ -0,0 +1,14 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: Array.prototype.filter applied to undefined throws a TypeError
+---*/
+
+
+assert.throws(TypeError, function() {
+  Array.prototype.filter.call(undefined); // TypeError is thrown if value is undefined
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-1-10.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-1-10.js
new file mode 100644
index 0000000000..5b57ba7a12
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-1-10.js
@@ -0,0 +1,19 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: Array.prototype.filter applied to the Math object
+---*/
+
+function callbackfn(val, idx, obj) {
+  return '[object Math]' === Object.prototype.toString.call(obj);
+}
+
+Math.length = 1;
+Math[0] = 1;
+var newArr = Array.prototype.filter.call(Math, callbackfn);
+
+assert.sameValue(newArr[0], 1, 'newArr[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-1-11.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-1-11.js
new file mode 100644
index 0000000000..8f187eb12f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-1-11.js
@@ -0,0 +1,21 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: Array.prototype.filter applied to Date object
+---*/
+
+function callbackfn(val, idx, obj) {
+  return obj instanceof Date;
+}
+
+var obj = new Date();
+obj.length = 1;
+obj[0] = 1;
+
+var newArr = Array.prototype.filter.call(obj, callbackfn);
+
+assert.sameValue(newArr[0], 1, 'newArr[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-1-12.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-1-12.js
new file mode 100644
index 0000000000..99a2fbb219
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-1-12.js
@@ -0,0 +1,21 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: Array.prototype.filter applied to RegExp object
+---*/
+
+function callbackfn(val, idx, obj) {
+  return obj instanceof RegExp;
+}
+
+var obj = new RegExp();
+obj.length = 2;
+obj[1] = true;
+
+var newArr = Array.prototype.filter.call(obj, callbackfn);
+
+assert.sameValue(newArr[0], true, 'newArr[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-1-13.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-1-13.js
new file mode 100644
index 0000000000..81433b27d3
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-1-13.js
@@ -0,0 +1,19 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: Array.prototype.filter applied to the JSON object
+---*/
+
+function callbackfn(val, idx, obj) {
+  return '[object JSON]' === Object.prototype.toString.call(JSON);
+}
+
+JSON.length = 1;
+JSON[0] = 1;
+var newArr = Array.prototype.filter.call(JSON, callbackfn);
+
+assert.sameValue(newArr[0], 1, 'newArr[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-1-14.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-1-14.js
new file mode 100644
index 0000000000..c92ef73121
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-1-14.js
@@ -0,0 +1,21 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: Array.prototype.filter applied to Error object
+---*/
+
+function callbackfn(val, idx, obj) {
+  return obj instanceof Error;
+}
+
+var obj = new Error();
+obj.length = 1;
+obj[0] = 1;
+
+var newArr = Array.prototype.filter.call(obj, callbackfn);
+
+assert.sameValue(newArr[0], 1, 'newArr[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-1-15.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-1-15.js
new file mode 100644
index 0000000000..ae7b4382ce
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-1-15.js
@@ -0,0 +1,22 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: Array.prototype.filter applied to the Arguments object
+---*/
+
+function callbackfn(val, idx, obj) {
+  return '[object Arguments]' === Object.prototype.toString.call(obj);
+}
+
+var obj = (function() {
+  return arguments;
+}("a", "b"));
+
+var newArr = Array.prototype.filter.call(obj, callbackfn);
+
+assert.sameValue(newArr[0], "a", 'newArr[0]');
+assert.sameValue(newArr[1], "b", 'newArr[1]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-1-2.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-1-2.js
new file mode 100644
index 0000000000..a060c4dbcb
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-1-2.js
@@ -0,0 +1,14 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: Array.prototype.filter applied to null throws a TypeError
+---*/
+
+
+assert.throws(TypeError, function() {
+  Array.prototype.filter.call(null);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-1-3.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-1-3.js
new file mode 100644
index 0000000000..ded3e11af6
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-1-3.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: Array.prototype.filter applied to boolean primitive
+---*/
+
+function callbackfn(val, idx, obj) {
+  return obj instanceof Boolean;
+}
+
+Boolean.prototype[0] = true;
+Boolean.prototype.length = 1;
+
+var newArr = Array.prototype.filter.call(false, callbackfn);
+
+assert.sameValue(newArr[0], true, 'newArr[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-1-4.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-1-4.js
new file mode 100644
index 0000000000..8ee3b23f02
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-1-4.js
@@ -0,0 +1,23 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: Array.prototype.filter applied to Boolean Object
+---*/
+
+function callbackfn(val, idx, obj) {
+  return obj instanceof Boolean;
+}
+
+var obj = new Boolean(true);
+obj.length = 2;
+obj[0] = 11;
+obj[1] = 12;
+
+var newArr = Array.prototype.filter.call(obj, callbackfn);
+
+assert.sameValue(newArr[0], 11, 'newArr[0]');
+assert.sameValue(newArr[1], 12, 'newArr[1]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-1-5.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-1-5.js
new file mode 100644
index 0000000000..f1877b6544
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-1-5.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: Array.prototype.filter applied to number primitive
+---*/
+
+function callbackfn(val, idx, obj) {
+  return obj instanceof Number;
+}
+
+Number.prototype[0] = 1;
+Number.prototype.length = 1;
+
+var newArr = Array.prototype.filter.call(2.5, callbackfn);
+
+assert.sameValue(newArr[0], 1, 'newArr[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-1-6.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-1-6.js
new file mode 100644
index 0000000000..210a2b538e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-1-6.js
@@ -0,0 +1,23 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: Array.prototype.filter applied to Number object
+---*/
+
+function callbackfn(val, idx, obj) {
+  return obj instanceof Number;
+}
+
+var obj = new Number(-128);
+obj.length = 2;
+obj[0] = 11;
+obj[1] = 12;
+
+var newArr = Array.prototype.filter.call(obj, callbackfn);
+
+assert.sameValue(newArr[0], 11, 'newArr[0]');
+assert.sameValue(newArr[1], 12, 'newArr[1]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-1-7.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-1-7.js
new file mode 100644
index 0000000000..fc358c7460
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-1-7.js
@@ -0,0 +1,17 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: Array.prototype.filter applied to string primitive
+---*/
+
+function callbackfn(val, idx, obj) {
+  return obj instanceof String;
+}
+
+var newArr = Array.prototype.filter.call("abc", callbackfn);
+
+assert.sameValue(newArr[0], "a", 'newArr[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-1-8.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-1-8.js
new file mode 100644
index 0000000000..7e0ddc08d2
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-1-8.js
@@ -0,0 +1,18 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: Array.prototype.filter applied to String object
+---*/
+
+function callbackfn(val, idx, obj) {
+  return obj instanceof String;
+}
+
+var obj = new String("abc");
+var newArr = Array.prototype.filter.call(obj, callbackfn);
+
+assert.sameValue(newArr[0], "a", 'newArr[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-1-9.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-1-9.js
new file mode 100644
index 0000000000..da468f6cb0
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-1-9.js
@@ -0,0 +1,24 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: Array.prototype.filter applied to Function object
+---*/
+
+function callbackfn(val, idx, obj) {
+  return obj instanceof Function;
+}
+
+var obj = function(a, b) {
+  return a + b;
+};
+obj[0] = 11;
+obj[1] = 9;
+
+var newArr = Array.prototype.filter.call(obj, callbackfn);
+
+assert.sameValue(newArr[0], 11, 'newArr[0]');
+assert.sameValue(newArr[1], 9, 'newArr[1]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-10-1.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-10-1.js
new file mode 100644
index 0000000000..d69b8f89ff
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-10-1.js
@@ -0,0 +1,24 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: >
+    Array.prototype.filter doesn't mutate the Array on which it is
+    called on
+---*/
+
+function callbackfn(val, idx, obj)
+{
+  return true;
+}
+var srcArr = [1, 2, 3, 4, 5];
+srcArr.filter(callbackfn);
+
+assert.sameValue(srcArr[0], 1, 'srcArr[0]');
+assert.sameValue(srcArr[1], 2, 'srcArr[1]');
+assert.sameValue(srcArr[2], 3, 'srcArr[2]');
+assert.sameValue(srcArr[3], 4, 'srcArr[3]');
+assert.sameValue(srcArr[4], 5, 'srcArr[4]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-10-2.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-10-2.js
new file mode 100644
index 0000000000..b1e81d72ca
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-10-2.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: >
+    Array.prototype.filter returns new Array with length equal to
+    number of true returned by callbackfn
+---*/
+
+function callbackfn(val, idx, obj)
+{
+  if (val % 2)
+    return true;
+  else
+    return false;
+}
+var srcArr = [1, 2, 3, 4, 5];
+var resArr = srcArr.filter(callbackfn);
+
+assert.sameValue(resArr.length, 3, 'resArr.length');
+assert.sameValue(resArr[0], 1, 'resArr[0]');
+assert.sameValue(resArr[1], 3, 'resArr[1]');
+assert.sameValue(resArr[2], 5, 'resArr[2]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-10-3.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-10-3.js
new file mode 100644
index 0000000000..ea732a2775
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-10-3.js
@@ -0,0 +1,24 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: Array.prototype.filter - subclassed array when length is reduced
+---*/
+
+foo.prototype = new Array(1, 2, 3);
+
+function foo() {}
+var f = new foo();
+f.length = 1;
+
+function cb() {
+  return true;
+}
+var a = f.filter(cb);
+
+
+assert(Array.isArray(a), 'Array.isArray(a) !== true');
+assert.sameValue(a.length, 1, 'a.length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-10-4.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-10-4.js
new file mode 100644
index 0000000000..417828fe76
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-10-4.js
@@ -0,0 +1,23 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: Array.prototype.filter doesn't visit expandos
+---*/
+
+var callCnt = 0;
+
+function callbackfn(val, idx, obj)
+{
+  callCnt++;
+}
+var srcArr = [1, 2, 3, 4, 5];
+srcArr["i"] = 10;
+srcArr[true] = 11;
+
+var resArr = srcArr.filter(callbackfn);
+
+assert.sameValue(callCnt, 5, 'callCnt');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-2-1.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-2-1.js
new file mode 100644
index 0000000000..48bd125ee0
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-2-1.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: >
+    Array.prototype.filter applied to Array-like object, 'length' is
+    own data property
+---*/
+
+function callbackfn(val, idx, obj) {
+  return obj.length === 2;
+}
+
+var obj = {
+  0: 12,
+  1: 11,
+  2: 9,
+  length: 2
+};
+
+var newArr = Array.prototype.filter.call(obj, callbackfn);
+
+assert.sameValue(newArr.length, 2, 'newArr.length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-2-10.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-2-10.js
new file mode 100644
index 0000000000..36ccaaa6f7
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-2-10.js
@@ -0,0 +1,36 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: >
+    Array.prototype.filter applied to Array-like object, 'length' is
+    inherited accessor property
+---*/
+
+function callbackfn(val, idx, obj) {
+  return obj.length === 2;
+}
+
+var proto = {};
+
+Object.defineProperty(proto, "length", {
+  get: function() {
+    return 2;
+  },
+  configurable: true
+});
+
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+child[0] = 12;
+child[1] = 11;
+child[2] = 9;
+
+var newArr = Array.prototype.filter.call(child, callbackfn);
+
+assert.sameValue(newArr.length, 2, 'newArr.length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-2-11.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-2-11.js
new file mode 100644
index 0000000000..5a677b381b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-2-11.js
@@ -0,0 +1,32 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: >
+    Array.prototype.filter applied to Array-like object, 'length' is
+    own accessor property without a get function
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return true;
+}
+
+var obj = {
+  0: 11,
+  1: 12
+};
+Object.defineProperty(obj, "length", {
+  set: function() {},
+  configurable: true
+});
+
+var newArr = Array.prototype.filter.call(obj, callbackfn);
+
+assert.sameValue(newArr.length, 0, 'newArr.length');
+assert.sameValue(accessed, false, 'accessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-2-12.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-2-12.js
new file mode 100644
index 0000000000..195c29d06d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-2-12.js
@@ -0,0 +1,39 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: >
+    Array.prototype.filter - 'length' is own accessor property without
+    a get function that overrides an inherited accessor property
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return true;
+}
+
+Object.defineProperty(Object.prototype, "length", {
+  get: function() {
+    return 2;
+  },
+  configurable: true
+});
+
+var obj = {
+  0: 12,
+  1: 11
+};
+Object.defineProperty(obj, "length", {
+  set: function() {},
+  configurable: true
+});
+
+var newArr = Array.prototype.filter.call(obj, callbackfn);
+
+assert.sameValue(newArr.length, 0, 'newArr.length');
+assert.sameValue(accessed, false, 'accessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-2-13.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-2-13.js
new file mode 100644
index 0000000000..dac99a967d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-2-13.js
@@ -0,0 +1,36 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: >
+    Array.prototype.filter applied to the Array-like object that
+    'length' is inherited accessor property without a get function
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return true;
+}
+
+var proto = {};
+Object.defineProperty(proto, "length", {
+  set: function() {},
+  configurable: true
+});
+
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+child[0] = 11;
+child[1] = 12;
+
+var newArr = Array.prototype.filter.call(child, callbackfn);
+
+assert.sameValue(newArr.length, 0, 'newArr.length');
+assert.sameValue(accessed, false, 'accessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-2-14.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-2-14.js
new file mode 100644
index 0000000000..f2d7e5e276
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-2-14.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: >
+    Array.prototype.filter applied to the Array-like object that
+    'length property doesn't exist
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return true;
+}
+
+var obj = {
+  0: 11,
+  1: 12
+};
+
+var newArr = Array.prototype.filter.call(obj, callbackfn);
+
+assert.sameValue(newArr.length, 0, 'newArr.length');
+assert.sameValue(accessed, false, 'accessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-2-17.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-2-17.js
new file mode 100644
index 0000000000..9250b9fbd9
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-2-17.js
@@ -0,0 +1,22 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: >
+    Array.prototype.filter applied to the Arguments object, which
+    implements its own property get method
+---*/
+
+function callbackfn(val, idx, obj) {
+  return obj.length === 2;
+}
+
+var func = function(a, b) {
+  var newArr = Array.prototype.filter.call(arguments, callbackfn);
+  return newArr.length === 2;
+};
+
+assert(func(12, 11), 'func(12, 11) !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-2-18.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-2-18.js
new file mode 100644
index 0000000000..3660e392ad
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-2-18.js
@@ -0,0 +1,21 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: >
+    Array.prototype.filter applied to String object, which implements
+    its own property get method
+---*/
+
+function callbackfn(val, idx, obj) {
+  return obj.length === 3;
+}
+
+var str = new String("012");
+
+var newArr = Array.prototype.filter.call(str, callbackfn);
+
+assert.sameValue(newArr.length, 3, 'newArr.length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-2-19.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-2-19.js
new file mode 100644
index 0000000000..876e104660
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-2-19.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: >
+    Array.prototype.filter applied to Function object, which
+    implements its own property get method
+---*/
+
+function callbackfn(val, idx, obj) {
+  return obj.length === 2;
+}
+
+var fun = function(a, b) {
+  return a + b;
+};
+fun[0] = 12;
+fun[1] = 11;
+fun[2] = 9;
+
+var newArr = Array.prototype.filter.call(fun, callbackfn);
+
+assert.sameValue(newArr.length, 2, 'newArr.length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-2-2.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-2-2.js
new file mode 100644
index 0000000000..b67bb19b26
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-2-2.js
@@ -0,0 +1,17 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: Array.prototype.filter - 'length' is own data property on an Array
+---*/
+
+function callbackfn(val, idx, obj) {
+  return obj.length === 2;
+}
+
+var newArr = [12, 11].filter(callbackfn);
+
+assert.sameValue(newArr.length, 2, 'newArr.length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-2-3.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-2-3.js
new file mode 100644
index 0000000000..674169313a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-2-3.js
@@ -0,0 +1,32 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: >
+    Array.prototype.filter applied to Array-like object, 'length' is
+    an own data property that overrides an inherited data property
+---*/
+
+function callbackfn(val, idx, obj) {
+  return obj.length === 2;
+}
+
+var proto = {
+  length: 3
+};
+
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+child.length = 2;
+child[0] = 12;
+child[1] = 11;
+child[2] = 9;
+
+var newArr = Array.prototype.filter.call(child, callbackfn);
+
+assert.sameValue(newArr.length, 2, 'newArr.length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-2-4.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-2-4.js
new file mode 100644
index 0000000000..33c1bf0fc5
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-2-4.js
@@ -0,0 +1,23 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: >
+    Array.prototype.filter - 'length' is own data property that
+    overrides an inherited data property on an Array
+---*/
+
+var arrProtoLen;
+
+function callbackfn(val, idx, obj) {
+  return obj.length === 2;
+}
+
+arrProtoLen = Array.prototype.length;
+Array.prototype.length = 0;
+var newArr = [12, 11].filter(callbackfn);
+
+assert.sameValue(newArr.length, 2, 'newArr.length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-2-5.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-2-5.js
new file mode 100644
index 0000000000..0e3692f636
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-2-5.js
@@ -0,0 +1,40 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: >
+    Array.prototype.filter to Array-like object, 'length' is an own
+    data property that overrides an inherited accessor property
+---*/
+
+function callbackfn(val, idx, obj) {
+  return obj.length === 2;
+}
+
+var proto = {};
+
+Object.defineProperty(proto, "length", {
+  get: function() {
+    return 3;
+  },
+  configurable: true
+});
+
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+Object.defineProperty(child, "length", {
+  value: 2,
+  configurable: true
+});
+child[0] = 12;
+child[1] = 11;
+child[2] = 9;
+
+var newArr = Array.prototype.filter.call(child, callbackfn);
+
+assert.sameValue(newArr.length, 2, 'newArr.length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-2-6.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-2-6.js
new file mode 100644
index 0000000000..e6c242e034
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-2-6.js
@@ -0,0 +1,31 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: >
+    Array.prototype.filter applied to Array-like object, 'length' is
+    an inherited data property
+---*/
+
+function callbackfn(val, idx, obj) {
+  return obj.length === 2;
+}
+
+var proto = {
+  length: 2
+};
+
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+child[0] = 12;
+child[1] = 11;
+child[2] = 9;
+
+var newArr = Array.prototype.filter.call(child, callbackfn);
+
+assert.sameValue(newArr.length, 2, 'newArr.length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-2-7.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-2-7.js
new file mode 100644
index 0000000000..1cc47a52e7
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-2-7.js
@@ -0,0 +1,32 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: >
+    Array.prototype.filter applied to Array-like object, 'length' is
+    an own accessor property
+---*/
+
+function callbackfn(val, idx, obj) {
+  return obj.length === 2;
+}
+
+var obj = {};
+
+Object.defineProperty(obj, "length", {
+  get: function() {
+    return 2;
+  },
+  configurable: true
+});
+
+obj[0] = 12;
+obj[1] = 11;
+obj[2] = 9;
+
+var newArr = Array.prototype.filter.call(obj, callbackfn);
+
+assert.sameValue(newArr.length, 2, 'newArr.length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-2-8.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-2-8.js
new file mode 100644
index 0000000000..739aed6976
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-2-8.js
@@ -0,0 +1,39 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: >
+    Array.prototype.filter applied to Array-like object, 'length' is
+    own accessor property that overrides an inherited data property
+---*/
+
+function callbackfn(val, idx, obj) {
+  return obj.length === 2;
+}
+
+var proto = {
+  length: 3
+};
+
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+
+Object.defineProperty(child, "length", {
+  get: function() {
+    return 2;
+  },
+  configurable: true
+});
+
+child[0] = 12;
+child[1] = 11;
+child[2] = 9;
+
+var newArr = Array.prototype.filter.call(child, callbackfn);
+
+assert.sameValue(newArr.length, 2, 'newArr.length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-2-9.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-2-9.js
new file mode 100644
index 0000000000..5f0a0f513b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-2-9.js
@@ -0,0 +1,45 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: >
+    Array.prototype.filter applied to Array-like object, 'length' is
+    an own accessor property that overrides an inherited accessor
+    property
+---*/
+
+function callbackfn(val, idx, obj) {
+  return obj.length === 2;
+}
+
+var proto = {};
+
+Object.defineProperty(proto, "length", {
+  get: function() {
+    return 3;
+  },
+  configurable: true
+});
+
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+
+Object.defineProperty(child, "length", {
+  get: function() {
+    return 2;
+  },
+  configurable: true
+});
+
+child[0] = 12;
+child[1] = 11;
+child[2] = 9;
+
+var newArr = Array.prototype.filter.call(child, callbackfn);
+
+assert.sameValue(newArr.length, 2, 'newArr.length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-3-1.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-3-1.js
new file mode 100644
index 0000000000..68cb7c9124
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-3-1.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: Array.prototype.filter - value of 'length' is undefined
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return true;
+}
+
+var obj = {
+  0: 0,
+  1: 1,
+  length: undefined
+};
+var newArr = Array.prototype.filter.call(obj, callbackfn);
+
+assert.sameValue(newArr.length, 0, 'newArr.length');
+assert.sameValue(accessed, false, 'accessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-3-10.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-3-10.js
new file mode 100644
index 0000000000..4d2bb32d41
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-3-10.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: >
+    Array.prototype.filter - value of 'length' is a number (value is
+    NaN)
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return true;
+}
+
+var obj = {
+  0: 9,
+  length: NaN
+};
+
+var newArr = Array.prototype.filter.call(obj, callbackfn);
+
+assert.sameValue(newArr.length, 0, 'newArr.length');
+assert.sameValue(accessed, false, 'accessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-3-11.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-3-11.js
new file mode 100644
index 0000000000..90943c5308
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-3-11.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: >
+    Array.prototype.filter - 'length' is a string containing a
+    positive number
+---*/
+
+function callbackfn(val, idx, obj) {
+  return true;
+}
+
+var obj = {
+  1: 11,
+  2: 9,
+  length: "2"
+};
+
+var newArr = Array.prototype.filter.call(obj, callbackfn);
+
+assert.sameValue(newArr.length, 1, 'newArr.length');
+assert.sameValue(newArr[0], 11, 'newArr[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-3-12.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-3-12.js
new file mode 100644
index 0000000000..8188fddfd7
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-3-12.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: >
+    Array.prototype.filter - 'length' is a string containing a
+    negative number
+---*/
+
+function callbackfn(val, idx, obj) {
+  return true;
+}
+
+var obj = {
+  1: 11,
+  2: 9,
+  length: "-4294967294"
+};
+
+var newArr = Array.prototype.filter.call(obj, callbackfn);
+
+assert.sameValue(newArr.length, 0, 'newArr.length');
+assert.sameValue(newArr[0], undefined, 'newArr[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-3-13.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-3-13.js
new file mode 100644
index 0000000000..802c761bc1
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-3-13.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: >
+    Array.prototype.filter - 'length' is a string containing a decimal
+    number
+---*/
+
+function callbackfn(val, idx, obj) {
+  return true;
+}
+
+var obj = {
+  1: 11,
+  2: 9,
+  length: "2.5"
+};
+
+var newArr = Array.prototype.filter.call(obj, callbackfn);
+
+assert.sameValue(newArr.length, 1, 'newArr.length');
+assert.sameValue(newArr[0], 11, 'newArr[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-3-14.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-3-14.js
new file mode 100644
index 0000000000..5be62103ba
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-3-14.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: Array.prototype.filter - 'length' is a string containing -Infinity
+---*/
+
+var accessed2 = false;
+
+function callbackfn2(val, idx, obj) {
+  accessed2 = true;
+  return true;
+}
+
+var obj2 = {
+  0: 9,
+  length: "-Infinity"
+};
+
+var newArr2 = Array.prototype.filter.call(obj2, callbackfn2);
+
+assert.sameValue(accessed2, false, 'accessed2');
+assert.sameValue(newArr2.length, 0, 'newArr2.length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-3-15.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-3-15.js
new file mode 100644
index 0000000000..cca36b39c4
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-3-15.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: >
+    Array.prototype.filter - 'length' is a string containing an
+    exponential number
+---*/
+
+function callbackfn(val, idx, obj) {
+  return true;
+}
+
+var obj = {
+  1: 11,
+  2: 9,
+  length: "2E0"
+};
+
+var newArr = Array.prototype.filter.call(obj, callbackfn);
+
+assert.sameValue(newArr.length, 1, 'newArr.length');
+assert.sameValue(newArr[0], 11, 'newArr[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-3-16.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-3-16.js
new file mode 100644
index 0000000000..29cf064b6b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-3-16.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: >
+    Array.prototype.filter - 'length' is a string containing a hex
+    number
+---*/
+
+function callbackfn(val, idx, obj) {
+  return true;
+}
+
+var obj = {
+  1: 11,
+  2: 9,
+  length: "0x0002"
+};
+
+var newArr = Array.prototype.filter.call(obj, callbackfn);
+
+assert.sameValue(newArr.length, 1, 'newArr.length');
+assert.sameValue(newArr[0], 11, 'newArr[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-3-17.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-3-17.js
new file mode 100644
index 0000000000..30b986ef1d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-3-17.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: >
+    Array.prototype.filter - 'length' is a string containing a number
+    with leading zeros
+---*/
+
+function callbackfn(val, idx, obj) {
+  return true;
+}
+
+var obj = {
+  1: 11,
+  2: 9,
+  length: "0002.00"
+};
+
+var newArr = Array.prototype.filter.call(obj, callbackfn);
+
+assert.sameValue(newArr.length, 1, 'newArr.length');
+assert.sameValue(newArr[0], 11, 'newArr[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-3-18.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-3-18.js
new file mode 100644
index 0000000000..0215e2694b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-3-18.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: >
+    Array.prototype.filter - value of 'length' is a string that can't
+    convert to a number
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return true;
+}
+
+var obj = {
+  0: 9,
+  length: "asdf!_"
+};
+
+var newArr = Array.prototype.filter.call(obj, callbackfn);
+
+assert.sameValue(accessed, false, 'accessed');
+assert.sameValue(newArr.length, 0, 'newArr.length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-3-19.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-3-19.js
new file mode 100644
index 0000000000..3ab158f710
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-3-19.js
@@ -0,0 +1,30 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: >
+    Array.prototype.filter - value of 'length' is an Object which has
+    an own toString method.
+---*/
+
+function callbackfn(val, idx, obj) {
+  return true;
+}
+
+var obj = {
+  1: 11,
+  2: 9,
+  length: {
+    toString: function() {
+      return '2';
+    }
+  }
+};
+
+var newArr = Array.prototype.filter.call(obj, callbackfn);
+
+assert.sameValue(newArr.length, 1, 'newArr.length');
+assert.sameValue(newArr[0], 11, 'newArr[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-3-2.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-3-2.js
new file mode 100644
index 0000000000..22e01265b7
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-3-2.js
@@ -0,0 +1,25 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: >
+    Array.prototype.filter applied on an Array-like object if 'length'
+    is 1 (length overridden to true(type conversion))
+---*/
+
+function callbackfn(val, idx, obj) {
+  return true;
+}
+
+var obj = {
+  0: 11,
+  1: 9,
+  length: true
+};
+var newArr = Array.prototype.filter.call(obj, callbackfn);
+
+assert.sameValue(newArr.length, 1, 'newArr.length');
+assert.sameValue(newArr[0], 11, 'newArr[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-3-20.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-3-20.js
new file mode 100644
index 0000000000..f90742ca90
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-3-20.js
@@ -0,0 +1,30 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: >
+    Array.prototype.filter - value of 'length' is an Object which has
+    an own valueOf method.
+---*/
+
+function callbackfn(val, idx, obj) {
+  return true;
+}
+
+var obj = {
+  1: 11,
+  2: 9,
+  length: {
+    valueOf: function() {
+      return 2;
+    }
+  }
+};
+
+var newArr = Array.prototype.filter.call(obj, callbackfn);
+
+assert.sameValue(newArr.length, 1, 'newArr.length');
+assert.sameValue(newArr[0], 11, 'newArr[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-3-21.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-3-21.js
new file mode 100644
index 0000000000..9ff6c26339
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-3-21.js
@@ -0,0 +1,41 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: >
+    Array.prototype.filter - 'length' is an object that has an own
+    valueOf method that returns an object and toString method that
+    returns a string
+---*/
+
+var firstStepOccured = false;
+var secondStepOccured = false;
+
+function callbackfn(val, idx, obj) {
+  return true;
+}
+
+var obj = {
+  1: 11,
+  2: 9,
+  length: {
+    valueOf: function() {
+      firstStepOccured = true;
+      return {};
+    },
+    toString: function() {
+      secondStepOccured = true;
+      return '2';
+    }
+  }
+};
+
+var newArr = Array.prototype.filter.call(obj, callbackfn);
+
+assert.sameValue(newArr.length, 1, 'newArr.length');
+assert.sameValue(newArr[0], 11, 'newArr[0]');
+assert(firstStepOccured, 'firstStepOccured !== true');
+assert(secondStepOccured, 'secondStepOccured !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-3-22.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-3-22.js
new file mode 100644
index 0000000000..154689a2fb
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-3-22.js
@@ -0,0 +1,43 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: >
+    Array.prototype.filter throws TypeError exception when 'length' is
+    an object with toString and valueOf methods that don�t return
+    primitive values
+---*/
+
+var accessed = false;
+var firstStepOccured = false;
+var secondStepOccured = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return true;
+}
+
+var obj = {
+  1: 11,
+  2: 12,
+
+  length: {
+    valueOf: function() {
+      firstStepOccured = true;
+      return {};
+    },
+    toString: function() {
+      secondStepOccured = true;
+      return {};
+    }
+  }
+};
+assert.throws(TypeError, function() {
+  Array.prototype.filter.call(obj, callbackfn);
+});
+assert.sameValue(accessed, false, 'accessed');
+assert(firstStepOccured, 'firstStepOccured !== true');
+assert(secondStepOccured, 'secondStepOccured !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-3-23.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-3-23.js
new file mode 100644
index 0000000000..b8c1c53bf7
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-3-23.js
@@ -0,0 +1,48 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: >
+    Array.prototype.filter uses inherited valueOf method when 'length'
+    is an object with an own toString and inherited valueOf methods
+---*/
+
+var valueOfAccessed = false;
+var toStringAccessed = false;
+
+function callbackfn(val, idx, obj) {
+  return true;
+}
+
+var proto = {
+  valueOf: function() {
+    valueOfAccessed = true;
+    return 2;
+  }
+};
+
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+
+child.toString = function() {
+  toStringAccessed = true;
+  return '1';
+};
+
+var obj = {
+  1: 11,
+  2: 9,
+  length: child
+};
+
+var newArr = Array.prototype.filter.call(obj, callbackfn);
+
+assert.sameValue(newArr.length, 1, 'newArr.length');
+assert.sameValue(newArr[0], 11, 'newArr[0]');
+assert(valueOfAccessed, 'valueOfAccessed !== true');
+assert.sameValue(toStringAccessed, false, 'toStringAccessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-3-24.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-3-24.js
new file mode 100644
index 0000000000..3e36d93bde
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-3-24.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: >
+    Array.prototype.filter - value of 'length' is a positive
+    non-integer, ensure truncation occurs in the proper direction
+---*/
+
+function callbackfn(val, idx, obj) {
+  return true;
+}
+
+var obj = {
+  1: 11,
+  2: 9,
+  length: 2.685
+};
+
+var newArr = Array.prototype.filter.call(obj, callbackfn);
+
+assert.sameValue(newArr.length, 1, 'newArr.length');
+assert.sameValue(newArr[0], 11, 'newArr[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-3-25.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-3-25.js
new file mode 100644
index 0000000000..7c49e457ba
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-3-25.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: >
+    Array.prototype.filter - value of 'length' is a negative
+    non-integer
+---*/
+
+function callbackfn(val, idx, obj) {
+  return true;
+}
+
+var obj = {
+  1: 11,
+  2: 9,
+  length: -4294967294.5
+};
+
+var newArr = Array.prototype.filter.call(obj, callbackfn);
+
+assert.sameValue(newArr.length, 0, 'newArr.length');
+assert.sameValue(newArr[0], undefined, 'newArr[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-3-3.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-3-3.js
new file mode 100644
index 0000000000..1c736e81fc
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-3-3.js
@@ -0,0 +1,25 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: Array.prototype.filter - value of 'length' is a number (value is 0)
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return true;
+}
+
+var obj = {
+  0: 11,
+  length: 0
+};
+var newArr = Array.prototype.filter.call(obj, callbackfn);
+
+assert.sameValue(newArr.length, 0, 'newArr.length');
+assert.sameValue(accessed, false, 'accessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-3-4.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-3-4.js
new file mode 100644
index 0000000000..b2c07a36e1
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-3-4.js
@@ -0,0 +1,27 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: >
+    Array.prototype.filter - value of 'length' is a number (value is
+    +0)
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return true;
+}
+
+var obj = {
+  0: 11,
+  length: +0
+};
+var newArr = Array.prototype.filter.call(obj, callbackfn);
+
+assert.sameValue(newArr.length, 0, 'newArr.length');
+assert.sameValue(accessed, false, 'accessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-3-5.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-3-5.js
new file mode 100644
index 0000000000..1f42a8adb7
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-3-5.js
@@ -0,0 +1,27 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: >
+    Array.prototype.filter - value of 'length' is a number (value is
+    -0)
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return true;
+}
+
+var obj = {
+  0: 11,
+  length: -0
+};
+var newArr = Array.prototype.filter.call(obj, callbackfn);
+
+assert.sameValue(newArr.length, 0, 'newArr.length');
+assert.sameValue(accessed, false, 'accessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-3-6.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-3-6.js
new file mode 100644
index 0000000000..b1c1ce75a4
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-3-6.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: >
+    Array.prototype.filter - value of 'length' is a number (value is
+    positive)
+---*/
+
+function callbackfn(val, idx, obj) {
+  return true;
+}
+
+var obj = {
+  1: 11,
+  2: 9,
+  length: 2
+};
+
+var newArr = Array.prototype.filter.call(obj, callbackfn);
+
+assert.sameValue(newArr.length, 1, 'newArr.length');
+assert.sameValue(newArr[0], 11, 'newArr[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-3-7.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-3-7.js
new file mode 100644
index 0000000000..d1271b8e26
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-3-7.js
@@ -0,0 +1,25 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: >
+    Array.prototype.filter - value of 'length' is a number (value is
+    negative)
+---*/
+
+function callbackfn(val, idx, obj) {
+  return true;
+}
+
+var obj = {
+  1: 11,
+  2: 9,
+  length: -4294967294
+};
+var newArr = Array.prototype.filter.call(obj, callbackfn);
+
+assert.sameValue(newArr.length, 0, 'newArr.length');
+assert.sameValue(newArr[0], undefined, 'newArr[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-3-9.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-3-9.js
new file mode 100644
index 0000000000..04964b5017
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-3-9.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: >
+    Array.prototype.filter - value of 'length' is a number (value is
+    -Infinity)
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return true;
+}
+
+var obj = {
+  0: 9,
+  length: -Infinity
+};
+
+var newArr = Array.prototype.filter.call(obj, callbackfn);
+
+assert.sameValue(newArr.length, 0, 'newArr.length');
+assert.sameValue(accessed, false, 'accessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-4-1.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-4-1.js
new file mode 100644
index 0000000000..195ff47c06
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-4-1.js
@@ -0,0 +1,14 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: Array.prototype.filter throws TypeError if callbackfn is undefined
+---*/
+
+var arr = new Array(10);
+assert.throws(TypeError, function() {
+  arr.filter();
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-4-10.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-4-10.js
new file mode 100644
index 0000000000..d96861317d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-4-10.js
@@ -0,0 +1,27 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: >
+    Array.prototype.filter - the exception is not thrown if exception
+    was thrown by step 2
+---*/
+
+var obj = {
+  0: 11,
+  1: 12
+};
+
+Object.defineProperty(obj, "length", {
+  get: function() {
+    throw new Test262Error();
+  },
+  configurable: true
+});
+
+assert.throws(Test262Error, function() {
+  Array.prototype.filter.call(obj, undefined);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-4-11.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-4-11.js
new file mode 100644
index 0000000000..a9ece8bd6e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-4-11.js
@@ -0,0 +1,31 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: >
+    Array.prototype.filter - the exception is not thrown if exception
+    was thrown by step 3
+---*/
+
+var obj = {
+  0: 11,
+  1: 12
+};
+
+Object.defineProperty(obj, "length", {
+  get: function() {
+    return {
+      toString: function() {
+        throw new Test262Error();
+      }
+    };
+  },
+  configurable: true
+});
+
+assert.throws(Test262Error, function() {
+  Array.prototype.filter.call(obj, undefined);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-4-12.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-4-12.js
new file mode 100644
index 0000000000..4b7a09be3a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-4-12.js
@@ -0,0 +1,21 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: Array.prototype.filter - 'callbackfn' is a function
+---*/
+
+function callbackfn(val, idx, obj) {
+  if (idx === 1) {
+    return val === 9;
+  }
+  return false;
+}
+
+var newArr = [11, 9].filter(callbackfn);
+
+assert.sameValue(newArr.length, 1, 'newArr.length');
+assert.sameValue(newArr[0], 9, 'newArr[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-4-15.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-4-15.js
new file mode 100644
index 0000000000..5da546cf1b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-4-15.js
@@ -0,0 +1,36 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: >
+    Array.prototype.filter - calling with no callbackfn is the same as
+    passing undefined for callbackfn
+---*/
+
+var obj = {
+  10: 10
+};
+var lengthAccessed = false;
+var loopAccessed = false;
+Object.defineProperty(obj, "length", {
+  get: function() {
+    lengthAccessed = true;
+    return 20;
+  },
+  configurable: true
+});
+Object.defineProperty(obj, "0", {
+  get: function() {
+    loopAccessed = true;
+    return 10;
+  },
+  configurable: true
+});
+assert.throws(TypeError, function() {
+  Array.prototype.filter.call(obj);
+});
+assert(lengthAccessed, 'lengthAccessed !== true');
+assert.sameValue(loopAccessed, false, 'loopAccessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-4-2.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-4-2.js
new file mode 100644
index 0000000000..2cbeba24f7
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-4-2.js
@@ -0,0 +1,16 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: >
+    Array.prototype.filter throws ReferenceError if callbackfn is
+    unreferenced
+---*/
+
+var arr = new Array(10);
+assert.throws(ReferenceError, function() {
+  arr.filter(foo);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-4-3.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-4-3.js
new file mode 100644
index 0000000000..00e84f9daa
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-4-3.js
@@ -0,0 +1,14 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: Array.prototype.filter throws TypeError if callbackfn is null
+---*/
+
+var arr = new Array(10);
+assert.throws(TypeError, function() {
+  arr.filter(null);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-4-4.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-4-4.js
new file mode 100644
index 0000000000..c3903d90df
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-4-4.js
@@ -0,0 +1,14 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: Array.prototype.filter throws TypeError if callbackfn is boolean
+---*/
+
+var arr = new Array(10);
+assert.throws(TypeError, function() {
+  arr.filter(true);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-4-5.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-4-5.js
new file mode 100644
index 0000000000..20df59f015
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-4-5.js
@@ -0,0 +1,14 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: Array.prototype.filter throws TypeError if callbackfn is number
+---*/
+
+var arr = new Array(10);
+assert.throws(TypeError, function() {
+  arr.filter(5);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-4-6.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-4-6.js
new file mode 100644
index 0000000000..ea86a87569
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-4-6.js
@@ -0,0 +1,14 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: Array.prototype.filter throws TypeError if callbackfn is string
+---*/
+
+var arr = new Array(10);
+assert.throws(TypeError, function() {
+  arr.filter("abc");
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-4-7.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-4-7.js
new file mode 100644
index 0000000000..b5438a1094
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-4-7.js
@@ -0,0 +1,16 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: >
+    Array.prototype.filter throws TypeError if callbackfn is Object
+    without [[Call]] internal method
+---*/
+
+var arr = new Array(10);
+assert.throws(TypeError, function() {
+  arr.filter(new Object());
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-4-8.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-4-8.js
new file mode 100644
index 0000000000..ee4539946c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-4-8.js
@@ -0,0 +1,30 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: >
+    Array.prototype.filter - side effects produced by step 2 are
+    visible when an exception occurs
+---*/
+
+var obj = {
+  0: 11,
+  1: 12
+};
+
+var accessed = false;
+
+Object.defineProperty(obj, "length", {
+  get: function() {
+    accessed = true;
+    return 2;
+  },
+  configurable: true
+});
+assert.throws(TypeError, function() {
+  Array.prototype.filter.call(obj, null);
+});
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-4-9.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-4-9.js
new file mode 100644
index 0000000000..172734d3d1
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-4-9.js
@@ -0,0 +1,34 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: >
+    Array.prototype.filter - side effects produced by step 3 are
+    visible when an exception occurs
+---*/
+
+var obj = {
+  0: 11,
+  1: 12
+};
+
+var accessed = false;
+
+Object.defineProperty(obj, "length", {
+  get: function() {
+    return {
+      toString: function() {
+        accessed = true;
+        return "2";
+      }
+    };
+  },
+  configurable: true
+});
+assert.throws(TypeError, function() {
+  Array.prototype.filter.call(obj, null);
+});
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-5-1-s.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-5-1-s.js
new file mode 100644
index 0000000000..c9a8b2fdf7
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-5-1-s.js
@@ -0,0 +1,22 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: Array.prototype.filter - thisArg not passed to strict callbackfn
+flags: [noStrict]
+---*/
+
+var innerThisCorrect = false;
+
+function callbackfn(val, idx, obj) {
+  "use strict";
+  innerThisCorrect = this === undefined;
+  return true;
+}
+
+[1].filter(callbackfn);
+
+assert(innerThisCorrect, 'innerThisCorrect !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-5-1.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-5-1.js
new file mode 100644
index 0000000000..b1aa2e4d26
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-5-1.js
@@ -0,0 +1,23 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: Array.prototype.filter - thisArg is passed
+flags: [noStrict]
+---*/
+
+(function() {
+  this._15_4_4_20_5_1 = false;
+  var _15_4_4_20_5_1 = true;
+
+  function callbackfn(val, idx, obj) {
+    return this._15_4_4_20_5_1;
+  }
+  var srcArr = [1];
+  var resArr = srcArr.filter(callbackfn);
+
+  assert.sameValue(resArr.length, 0, 'resArr.length');
+})();
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-5-10.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-5-10.js
new file mode 100644
index 0000000000..57f34c4413
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-5-10.js
@@ -0,0 +1,23 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: Array.prototype.filter - Array Object can be used as thisArg
+---*/
+
+var accessed = false;
+var objArray = new Array(10);
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return this === objArray;
+}
+
+
+var newArr = [11].filter(callbackfn, objArray);
+
+assert.sameValue(newArr[0], 11, 'newArr[0]');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-5-11.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-5-11.js
new file mode 100644
index 0000000000..8046262733
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-5-11.js
@@ -0,0 +1,22 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: Array.prototype.filter - String Object can be used as thisArg
+---*/
+
+var accessed = false;
+var objString = new String();
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return this === objString;
+}
+
+var newArr = [11].filter(callbackfn, objString);
+
+assert.sameValue(newArr[0], 11, 'newArr[0]');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-5-12.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-5-12.js
new file mode 100644
index 0000000000..38088bbfa6
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-5-12.js
@@ -0,0 +1,22 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: Array.prototype.filter - Boolean Object can be used as thisArg
+---*/
+
+var accessed = false;
+var objBoolean = new Boolean();
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return this === objBoolean;
+}
+
+var newArr = [11].filter(callbackfn, objBoolean);
+
+assert.sameValue(newArr[0], 11, 'newArr[0]');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-5-13.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-5-13.js
new file mode 100644
index 0000000000..7015603bab
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-5-13.js
@@ -0,0 +1,22 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: Array.prototype.filter - Number Object can be used as thisArg
+---*/
+
+var accessed = false;
+var objNumber = new Number();
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return this === objNumber;
+}
+
+var newArr = [11].filter(callbackfn, objNumber);
+
+assert.sameValue(newArr[0], 11, 'newArr[0]');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-5-14.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-5-14.js
new file mode 100644
index 0000000000..d920aeb176
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-5-14.js
@@ -0,0 +1,21 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: Array.prototype.filter - the Math object can be used as thisArg
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return this === Math;
+}
+
+var newArr = [11].filter(callbackfn, Math);
+
+assert.sameValue(newArr[0], 11, 'newArr[0]');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-5-15.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-5-15.js
new file mode 100644
index 0000000000..5d8633d077
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-5-15.js
@@ -0,0 +1,23 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: Array.prototype.filter - Date Object can be used as thisArg
+---*/
+
+var accessed = false;
+
+var objDate = new Date();
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return this === objDate;
+}
+
+var newArr = [11].filter(callbackfn, objDate);
+
+assert.sameValue(newArr[0], 11, 'newArr[0]');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-5-16.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-5-16.js
new file mode 100644
index 0000000000..cc8b0c651d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-5-16.js
@@ -0,0 +1,23 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: Array.prototype.filter - RegExp Object can be used as thisArg
+---*/
+
+var accessed = false;
+
+var objRegExp = new RegExp();
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return this === objRegExp;
+}
+
+var newArr = [11].filter(callbackfn, objRegExp);
+
+assert.sameValue(newArr[0], 11, 'newArr[0]');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-5-17.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-5-17.js
new file mode 100644
index 0000000000..162cec62bb
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-5-17.js
@@ -0,0 +1,21 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: Array.prototype.filter - the JSON object can be used as thisArg
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return this === JSON;
+}
+
+var newArr = [11].filter(callbackfn, JSON);
+
+assert.sameValue(newArr[0], 11, 'newArr[0]');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-5-18.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-5-18.js
new file mode 100644
index 0000000000..4803e432ed
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-5-18.js
@@ -0,0 +1,22 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: Array.prototype.filter - Error Object can be used as thisArg
+---*/
+
+var accessed = false;
+var objError = new RangeError();
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return this === objError;
+}
+
+var newArr = [11].filter(callbackfn, objError);
+
+assert.sameValue(newArr[0], 11, 'newArr[0]');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-5-19.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-5-19.js
new file mode 100644
index 0000000000..fdf60d6557
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-5-19.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: >
+    Array.prototype.filter - the Arguments object can be used as
+    thisArg
+---*/
+
+var accessed = false;
+var arg;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return this === arg;
+}
+
+(function fun() {
+  arg = arguments;
+}(1, 2, 3));
+
+var newArr = [11].filter(callbackfn, arg);
+
+assert.sameValue(newArr[0], 11, 'newArr[0]');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-5-2.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-5-2.js
new file mode 100644
index 0000000000..3049d8b4d3
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-5-2.js
@@ -0,0 +1,23 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: Array.prototype.filter - thisArg is Object
+---*/
+
+var res = false;
+var o = new Object();
+o.res = true;
+
+function callbackfn(val, idx, obj)
+{
+  return this.res;
+}
+
+var srcArr = [1];
+var resArr = srcArr.filter(callbackfn, o);
+
+assert.sameValue(resArr.length, 1, 'resArr.length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-5-21.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-5-21.js
new file mode 100644
index 0000000000..fcee8ec25c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-5-21.js
@@ -0,0 +1,23 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: Array.prototype.filter - the global object can be used as thisArg
+---*/
+
+var global = this;
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return this === global;
+}
+
+var newArr = [11].filter(callbackfn, global);
+
+assert.sameValue(newArr[0], 11, 'newArr[0]');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-5-22.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-5-22.js
new file mode 100644
index 0000000000..5b66d3c755
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-5-22.js
@@ -0,0 +1,21 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: Array.prototype.filter - boolean primitive can be used as thisArg
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return this.valueOf() === false;
+}
+
+var newArr = [11].filter(callbackfn, false);
+
+assert.sameValue(newArr[0], 11, 'newArr[0]');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-5-23.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-5-23.js
new file mode 100644
index 0000000000..cc9a5e62e1
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-5-23.js
@@ -0,0 +1,21 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: Array.prototype.filter - number primitive can be used as thisArg
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return this.valueOf() === 101;
+}
+
+var newArr = [11].filter(callbackfn, 101);
+
+assert.sameValue(newArr[0], 11, 'newArr[0]');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-5-24.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-5-24.js
new file mode 100644
index 0000000000..4b8f2b9eb0
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-5-24.js
@@ -0,0 +1,21 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: Array.prototype.filter - string primitive can be used as thisArg
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return this.valueOf() === "abc";
+}
+
+var newArr = [11].filter(callbackfn, "abc");
+
+assert.sameValue(newArr[0], 11, 'newArr[0]');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-5-27.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-5-27.js
new file mode 100644
index 0000000000..f53147f35e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-5-27.js
@@ -0,0 +1,15 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: >
+    Array.prototype.filter - Array.isArray(arg) returns true when arg
+    is the returned array
+---*/
+
+var newArr = [11].filter(function() {});
+
+assert(Array.isArray(newArr), 'Array.isArray(newArr) !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-5-28.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-5-28.js
new file mode 100644
index 0000000000..e1aad658de
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-5-28.js
@@ -0,0 +1,13 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: Array.prototype.filter - the returned array is instanceof Array
+---*/
+
+var newArr = [11].filter(function() {});
+
+assert(newArr instanceof Array, 'newArr instanceof Array !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-5-29.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-5-29.js
new file mode 100644
index 0000000000..2c8a19cbac
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-5-29.js
@@ -0,0 +1,13 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: Array.prototype.filter - returns an array whose length is 0
+---*/
+
+var newArr = [11].filter(function() {});
+
+assert.sameValue(newArr.length, 0, 'newArr.length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-5-3.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-5-3.js
new file mode 100644
index 0000000000..591e1e0c88
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-5-3.js
@@ -0,0 +1,23 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: Array.prototype.filter - thisArg is Array
+---*/
+
+var res = false;
+var a = new Array();
+a.res = true;
+
+function callbackfn(val, idx, obj)
+{
+  return this.res;
+}
+
+var srcArr = [1];
+var resArr = srcArr.filter(callbackfn, a);
+
+assert.sameValue(resArr.length, 1, 'resArr.length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-5-30.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-5-30.js
new file mode 100644
index 0000000000..135964229e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-5-30.js
@@ -0,0 +1,24 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: Array.prototype.filter - thisArg not passed
+flags: [noStrict]
+---*/
+
+function innerObj() {
+  this._15_4_4_20_5_30 = true;
+  var _15_4_4_20_5_30 = false;
+
+  function callbackfn(val, idx, obj) {
+    return this._15_4_4_20_5_30;
+  }
+  var srcArr = [1];
+  var resArr = srcArr.filter(callbackfn);
+  this.retVal = resArr.length === 0;
+}
+
+assert(new innerObj().retVal, 'new innerObj().retVal !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-5-4.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-5-4.js
new file mode 100644
index 0000000000..e46344834a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-5-4.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+es5id: 15.4.4.20-5-4
+description: >
+    Array.prototype.filter - thisArg is object from object
+    template(prototype)
+---*/
+
+var res = false;
+
+function callbackfn(val, idx, obj)
+{
+  return this.res;
+}
+
+function foo() {}
+foo.prototype.res = true;
+var f = new foo();
+
+var srcArr = [1];
+var resArr = srcArr.filter(callbackfn, f);
+
+assert.sameValue(resArr.length, 1, 'resArr.length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-5-5.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-5-5.js
new file mode 100644
index 0000000000..1e18d25e06
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-5-5.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+es5id: 15.4.4.20-5-5
+description: Array.prototype.filter - thisArg is object from object template
+---*/
+
+var res = false;
+
+function callbackfn(val, idx, obj)
+{
+  return this.res;
+}
+
+function foo() {}
+var f = new foo();
+f.res = true;
+
+var srcArr = [1];
+var resArr = srcArr.filter(callbackfn, f);
+
+assert.sameValue(resArr.length, 1, 'resArr.length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-5-6.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-5-6.js
new file mode 100644
index 0000000000..2784f54252
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-5-6.js
@@ -0,0 +1,25 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+es5id: 15.4.4.20-5-6
+description: Array.prototype.filter - thisArg is function
+---*/
+
+var res = false;
+
+function callbackfn(val, idx, obj)
+{
+  return this.res;
+}
+
+function foo() {}
+foo.res = true;
+
+var srcArr = [1];
+var resArr = srcArr.filter(callbackfn, foo);
+
+assert.sameValue(resArr.length, 1, 'resArr.length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-5-7.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-5-7.js
new file mode 100644
index 0000000000..76f7b0161a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-5-7.js
@@ -0,0 +1,22 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+es5id: 15.4.4.20-5-7
+description: Array.prototype.filter - built-in functions can be used as thisArg
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return this === eval;
+}
+
+var newArr = [11].filter(callbackfn, eval);
+
+assert.sameValue(newArr[0], 11, 'newArr[0]');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-5-9.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-5-9.js
new file mode 100644
index 0000000000..f2be4d947a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-5-9.js
@@ -0,0 +1,23 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+es5id: 15.4.4.20-5-9
+description: Array.prototype.filter - Function Object can be used as thisArg
+---*/
+
+var accessed = false;
+var objFunction = function() {};
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return this === objFunction;
+}
+
+var newArr = [11].filter(callbackfn, objFunction);
+
+assert.sameValue(newArr[0], 11, 'newArr[0]');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-6-1.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-6-1.js
new file mode 100644
index 0000000000..b37bd42001
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-6-1.js
@@ -0,0 +1,18 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+es5id: 15.4.4.20-6-1
+description: >
+    Array.prototype.filter returns an empty array if 'length' is 0
+    (empty array)
+---*/
+
+function cb() {}
+var a = [].filter(cb);
+
+assert(Array.isArray(a), 'Array.isArray(a) !== true');
+assert.sameValue(a.length, 0, 'a.length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-6-2.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-6-2.js
new file mode 100644
index 0000000000..babc443f62
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-6-2.js
@@ -0,0 +1,25 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+es5id: 15.4.4.20-6-2
+description: >
+    Array.prototype.filter returns an empty array if 'length' is 0
+    (subclassed Array, length overridden to null (type conversion))
+---*/
+
+foo.prototype = new Array(1, 2, 3);
+
+function foo() {}
+var f = new foo();
+f.length = null;
+
+function cb() {}
+var a = f.filter(cb);
+
+
+assert(Array.isArray(a), 'Array.isArray(a) !== true');
+assert.sameValue(a.length, 0, 'a.length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-6-3.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-6-3.js
new file mode 100644
index 0000000000..fa85fb3e6d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-6-3.js
@@ -0,0 +1,25 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+es5id: 15.4.4.20-6-3
+description: >
+    Array.prototype.filter returns an empty array if 'length' is 0
+    (subclassed Array, length overridden to false (type conversion))
+---*/
+
+foo.prototype = new Array(1, 2, 3);
+
+function foo() {}
+var f = new foo();
+f.length = false;
+
+function cb() {}
+var a = f.filter(cb);
+
+
+assert(Array.isArray(a), 'Array.isArray(a) !== true');
+assert.sameValue(a.length, 0, 'a.length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-6-4.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-6-4.js
new file mode 100644
index 0000000000..da5b339473
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-6-4.js
@@ -0,0 +1,25 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+es5id: 15.4.4.20-6-4
+description: >
+    Array.prototype.filter returns an empty array if 'length' is 0
+    (subclassed Array, length overridden to 0 (type conversion))
+---*/
+
+foo.prototype = new Array(1, 2, 3);
+
+function foo() {}
+var f = new foo();
+f.length = 0;
+
+function cb() {}
+var a = f.filter(cb);
+
+
+assert(Array.isArray(a), 'Array.isArray(a) !== true');
+assert.sameValue(a.length, 0, 'a.length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-6-5.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-6-5.js
new file mode 100644
index 0000000000..2c163c61c8
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-6-5.js
@@ -0,0 +1,25 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+es5id: 15.4.4.20-6-5
+description: >
+    Array.prototype.filter returns an empty array if 'length' is 0
+    (subclassed Array, length overridden to '0' (type conversion))
+---*/
+
+foo.prototype = new Array(1, 2, 3);
+
+function foo() {}
+var f = new foo();
+f.length = '0';
+
+function cb() {}
+var a = f.filter(cb);
+
+
+assert(Array.isArray(a), 'Array.isArray(a) !== true');
+assert.sameValue(a.length, 0, 'a.length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-6-6.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-6-6.js
new file mode 100644
index 0000000000..9284917cb5
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-6-6.js
@@ -0,0 +1,31 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+es5id: 15.4.4.20-6-6
+description: >
+    Array.prototype.filter returns an empty array if 'length' is 0
+    (subclassed Array, length overridden with obj with valueOf)
+---*/
+
+foo.prototype = new Array(1, 2, 3);
+
+function foo() {}
+var f = new foo();
+
+var o = {
+  valueOf: function() {
+    return 0;
+  }
+};
+f.length = o;
+
+function cb() {}
+var a = f.filter(cb);
+
+
+assert(Array.isArray(a), 'Array.isArray(a) !== true');
+assert.sameValue(a.length, 0, 'a.length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-6-7.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-6-7.js
new file mode 100644
index 0000000000..3197dd19e9
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-6-7.js
@@ -0,0 +1,38 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+es5id: 15.4.4.20-6-7
+description: >
+    Array.prototype.filter returns an empty array if 'length' is 0
+    (subclassed Array, length overridden with obj w/o valueOf
+    (toString))
+---*/
+
+foo.prototype = new Array(1, 2, 3);
+
+function foo() {}
+var f = new foo();
+
+var o = {
+  toString: function() {
+    return '0';
+  }
+};
+f.length = o;
+
+// objects inherit the default valueOf method of the Object object;
+// that simply returns the itself. Since the default valueOf() method
+// does not return a primitive value, ES next tries to convert the object
+// to a number by calling its toString() method and converting the
+// resulting string to a number.
+
+function cb() {}
+var a = f.filter(cb);
+
+
+assert(Array.isArray(a), 'Array.isArray(a) !== true');
+assert.sameValue(a.length, 0, 'a.length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-6-8.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-6-8.js
new file mode 100644
index 0000000000..08cd6176e9
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-6-8.js
@@ -0,0 +1,40 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+es5id: 15.4.4.20-6-8
+description: >
+    Array.prototype.filter returns an empty array if 'length' is 0
+    (subclassed Array, length overridden with []
+---*/
+
+foo.prototype = new Array(1, 2, 3);
+
+function foo() {}
+var f = new foo();
+
+f.length = [];
+
+// objects inherit the default valueOf method of the Object object;
+// that simply returns the itself. Since the default valueOf() method
+// does not return a primitive value, ES next tries to convert the object
+// to a number by calling its toString() method and converting the
+// resulting string to a number.
+//
+// The toString( ) method on Array converts the array elements to strings,
+// then returns the result of concatenating these strings, with commas in
+// between. An array with no elements converts to the empty string, which
+// converts to the number 0. If an array has a single element that is a
+// number n, the array converts to a string representation of n, which is
+// then converted back to n itself. If an array contains more than one element,
+// or if its one element is not a number, the array converts to NaN.
+
+function cb() {}
+var a = f.filter(cb);
+
+
+assert(Array.isArray(a), 'Array.isArray(a) !== true');
+assert.sameValue(a.length, 0, 'a.length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-1.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-1.js
new file mode 100644
index 0000000000..005f390cc4
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-1.js
@@ -0,0 +1,23 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+es5id: 15.4.4.20-9-1
+description: >
+    Array.prototype.filter doesn't consider new elements added to
+    array after it is called
+---*/
+
+function callbackfn(val, idx, obj) {
+  srcArr[2] = 3;
+  srcArr[5] = 6;
+  return true;
+}
+
+var srcArr = [1, 2, , 4, 5];
+var resArr = srcArr.filter(callbackfn);
+
+assert.sameValue(resArr.length, 5, 'resArr.length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-2.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-2.js
new file mode 100644
index 0000000000..3814a7614f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-2.js
@@ -0,0 +1,29 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+es5id: 15.4.4.20-9-2
+description: >
+    Array.prototype.filter considers new value of elements in array
+    after it is called
+---*/
+
+function callbackfn(val, idx, obj)
+{
+  srcArr[2] = -1;
+  srcArr[4] = -1;
+  if (val > 0)
+    return true;
+  else
+    return false;
+}
+
+var srcArr = [1, 2, 3, 4, 5];
+var resArr = srcArr.filter(callbackfn);
+
+assert.sameValue(resArr.length, 3, 'resArr.length');
+assert.sameValue(resArr[0], 1, 'resArr[0]');
+assert.sameValue(resArr[2], 4, 'resArr[2]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-3.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-3.js
new file mode 100644
index 0000000000..a793631f50
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-3.js
@@ -0,0 +1,30 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+es5id: 15.4.4.20-9-3
+description: >
+    Array.prototype.filter doesn't visit deleted elements in array
+    after the call
+---*/
+
+function callbackfn(val, idx, obj)
+{
+  delete srcArr[2];
+  delete srcArr[4];
+  if (val > 0)
+    return true;
+  else
+    return false;
+}
+
+var srcArr = [1, 2, 3, 4, 5];
+var resArr = srcArr.filter(callbackfn);
+
+// two elements deleted
+assert.sameValue(resArr.length, 3, 'resArr.length');
+assert.sameValue(resArr[0], 1, 'resArr[0]');
+assert.sameValue(resArr[2], 4, 'resArr[2]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-4.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-4.js
new file mode 100644
index 0000000000..84f7a666c4
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-4.js
@@ -0,0 +1,23 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+es5id: 15.4.4.20-9-4
+description: >
+    Array.prototype.filter doesn't visit deleted elements when
+    Array.length is decreased
+---*/
+
+function callbackfn(val, idx, obj)
+{
+  srcArr.length = 2;
+  return true;
+}
+
+var srcArr = [1, 2, 3, 4, 6];
+var resArr = srcArr.filter(callbackfn);
+
+assert.sameValue(resArr.length, 2, 'resArr.length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-5.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-5.js
new file mode 100644
index 0000000000..4b29c8d726
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-5.js
@@ -0,0 +1,25 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+es5id: 15.4.4.20-9-5
+description: >
+    Array.prototype.filter doesn't consider newly added elements in
+    sparse array
+---*/
+
+function callbackfn(val, idx, obj)
+{
+  srcArr[1000] = 3;
+  return true;
+}
+
+var srcArr = new Array(10);
+srcArr[1] = 1;
+srcArr[2] = 2;
+var resArr = srcArr.filter(callbackfn);
+
+assert.sameValue(resArr.length, 2, 'resArr.length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-6.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-6.js
new file mode 100644
index 0000000000..4086e87b1a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-6.js
@@ -0,0 +1,32 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+es5id: 15.4.4.20-9-6
+description: >
+    Array.prototype.filter visits deleted element in array after the
+    call when same index is also present in prototype
+---*/
+
+function callbackfn(val, idx, obj)
+{
+  delete srcArr[2];
+  delete srcArr[4];
+  if (val > 0)
+    return true;
+  else
+    return false;
+}
+
+Array.prototype[4] = 5;
+var srcArr = [1, 2, 3, 4, 5];
+var resArr = srcArr.filter(callbackfn);
+delete Array.prototype[4];
+
+// only one element deleted
+assert.sameValue(resArr.length, 4, 'resArr.length');
+assert.sameValue(resArr[0], 1, 'resArr[0]');
+assert.sameValue(resArr[3], 5, 'resArr[3]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-7.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-7.js
new file mode 100644
index 0000000000..911b7bf0a0
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-7.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+es5id: 15.4.4.20-9-7
+description: >
+    Array.prototype.filter stops calling callbackfn once the array is
+    deleted during the call
+---*/
+
+var o = new Object();
+o.srcArr = [1, 2, 3, 4, 5];
+
+function callbackfn(val, idx, obj) {
+  delete o.srcArr;
+  if (val > 0)
+    return true;
+  else
+    return false;
+}
+
+var resArr = o.srcArr.filter(callbackfn);
+
+assert.sameValue(resArr.length, 5, 'resArr.length');
+assert.sameValue(typeof o.srcArr, "undefined", 'typeof o.srcArr');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-8.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-8.js
new file mode 100644
index 0000000000..36cd0cd218
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-8.js
@@ -0,0 +1,29 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+es5id: 15.4.4.20-9-8
+description: Array.prototype.filter - no observable effects occur if len is 0
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return val > 10;
+}
+
+var obj = {
+  0: 11,
+  1: 12,
+  length: 0
+};
+
+var newArr = Array.prototype.filter.call(obj, callbackfn);
+
+assert.sameValue(accessed, false, 'accessed');
+assert.sameValue(obj.length, 0, 'obj.length');
+assert.sameValue(newArr.length, 0, 'newArr.length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-9.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-9.js
new file mode 100644
index 0000000000..199c15d30e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-9.js
@@ -0,0 +1,38 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+es5id: 15.4.4.20-9-9
+description: >
+    Array.prototype.filter - modifications to length don't change
+    number of iterations
+---*/
+
+var called = 0;
+
+function callbackfn(val, idx, obj) {
+  called++;
+  return true;
+}
+
+var obj = {
+  1: 12,
+  2: 9,
+  length: 2
+};
+
+Object.defineProperty(obj, "0", {
+  get: function() {
+    obj.length = 3;
+    return 11;
+  },
+  configurable: true
+});
+
+var newArr = Array.prototype.filter.call(obj, callbackfn);
+
+assert.sameValue(newArr.length, 2, 'newArr.length');
+assert.sameValue(called, 2, 'called');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-b-1.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-b-1.js
new file mode 100644
index 0000000000..dce5fdae23
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-b-1.js
@@ -0,0 +1,27 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+es5id: 15.4.4.20-9-b-1
+description: >
+    Array.prototype.filter - callbackfn not called for indexes never
+    been assigned values
+---*/
+
+var callCnt = 0;
+
+function callbackfn(val, idx, obj)
+{
+  callCnt++;
+  return false;
+}
+
+var srcArr = new Array(10);
+srcArr[1] = undefined; //explicitly assigning a value
+var resArr = srcArr.filter(callbackfn);
+
+assert.sameValue(resArr.length, 0, 'resArr.length');
+assert.sameValue(callCnt, 1, 'callCnt');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-b-10.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-b-10.js
new file mode 100644
index 0000000000..bbd0c85461
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-b-10.js
@@ -0,0 +1,34 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+es5id: 15.4.4.20-9-b-10
+description: >
+    Array.prototype.filter - deleting property of prototype causes
+    prototype index property not to be visited on an Array-like Object
+---*/
+
+function callbackfn(val, idx, obj) {
+  return true;
+}
+var obj = {
+  2: 2,
+  length: 20
+};
+
+Object.defineProperty(obj, "0", {
+  get: function() {
+    delete Object.prototype[1];
+    return 0;
+  },
+  configurable: true
+});
+
+Object.prototype[1] = 1;
+var newArr = Array.prototype.filter.call(obj, callbackfn);
+
+assert.sameValue(newArr.length, 2, 'newArr.length');
+assert.notSameValue(newArr[1], 1, 'newArr[1]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-b-11.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-b-11.js
new file mode 100644
index 0000000000..5b16c7f308
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-b-11.js
@@ -0,0 +1,31 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+es5id: 15.4.4.20-9-b-11
+description: >
+    Array.prototype.filter - deleting property of prototype causes
+    prototype index property not to be visited on an Array
+---*/
+
+function callbackfn(val, idx, obj) {
+  return true;
+}
+var arr = [0, , 2];
+
+Object.defineProperty(arr, "0", {
+  get: function() {
+    delete Array.prototype[1];
+    return 0;
+  },
+  configurable: true
+});
+
+Array.prototype[1] = 1;
+var newArr = arr.filter(callbackfn);
+
+assert.sameValue(newArr.length, 2, 'newArr.length');
+assert.notSameValue(newArr[1], 1, 'newArr[1]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-b-12.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-b-12.js
new file mode 100644
index 0000000000..5474b0e6f8
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-b-12.js
@@ -0,0 +1,37 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+es5id: 15.4.4.20-9-b-12
+description: >
+    Array.prototype.filter - deleting own property with prototype
+    property causes prototype index property to be visited on an
+    Array-like object
+---*/
+
+function callbackfn(val, idx, obj) {
+  return true;
+}
+var obj = {
+  0: 0,
+  1: 111,
+  2: 2,
+  length: 10
+};
+
+Object.defineProperty(obj, "0", {
+  get: function() {
+    delete obj[1];
+    return 0;
+  },
+  configurable: true
+});
+
+Object.prototype[1] = 1;
+var newArr = Array.prototype.filter.call(obj, callbackfn);
+
+assert.sameValue(newArr.length, 3, 'newArr.length');
+assert.sameValue(newArr[1], 1, 'newArr[1]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-b-13.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-b-13.js
new file mode 100644
index 0000000000..bd91c8bf50
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-b-13.js
@@ -0,0 +1,31 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+es5id: 15.4.4.20-9-b-13
+description: >
+    Array.prototype.filter - deleting own property with prototype
+    property causes prototype index property to be visited on an Array
+---*/
+
+function callbackfn(val, idx, obj) {
+  return val < 3 ? true : false;
+}
+var arr = [0, 111, 2];
+
+Object.defineProperty(arr, "0", {
+  get: function() {
+    delete arr[1];
+    return 0;
+  },
+  configurable: true
+});
+
+Array.prototype[1] = 1;
+var newArr = arr.filter(callbackfn);
+
+assert.sameValue(newArr.length, 3, 'newArr.length');
+assert.sameValue(newArr[1], 1, 'newArr[1]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-b-14.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-b-14.js
new file mode 100644
index 0000000000..3d1136e563
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-b-14.js
@@ -0,0 +1,31 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+es5id: 15.4.4.20-9-b-14
+description: >
+    Array.prototype.filter - decreasing length of array causes index
+    property not to be visited
+---*/
+
+function callbackfn(val, idx, obj) {
+  return true;
+}
+var arr = [0, 1, 2, "last"];
+
+Object.defineProperty(arr, "0", {
+  get: function() {
+    arr.length = 3;
+    return 0;
+  },
+  configurable: true
+});
+
+var newArr = arr.filter(callbackfn);
+
+
+assert.sameValue(newArr.length, 3, 'newArr.length');
+assert.sameValue(newArr[2], 2, 'newArr[2]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-b-15.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-b-15.js
new file mode 100644
index 0000000000..9869b600ea
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-b-15.js
@@ -0,0 +1,37 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+es5id: 15.4.4.20-9-b-15
+description: >
+    Array.prototype.filter - decreasing length of array with prototype
+    property causes prototype index property to be visited
+---*/
+
+function callbackfn(val, idx, obj) {
+  return true;
+}
+var arr = [0, 1, 2];
+
+Object.defineProperty(Array.prototype, "2", {
+  get: function() {
+    return "prototype";
+  },
+  configurable: true
+});
+
+Object.defineProperty(arr, "1", {
+  get: function() {
+    arr.length = 2;
+    return 1;
+  },
+  configurable: true
+});
+
+var newArr = arr.filter(callbackfn);
+
+assert.sameValue(newArr.length, 3, 'newArr.length');
+assert.sameValue(newArr[2], "prototype", 'newArr[2]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-b-16.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-b-16.js
new file mode 100644
index 0000000000..8c47a71c1f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-b-16.js
@@ -0,0 +1,39 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+es5id: 15.4.4.20-9-b-16
+description: >
+    Array.prototype.filter - decreasing length of array does not
+    delete non-configurable properties
+flags: [noStrict]
+---*/
+
+function callbackfn(val, idx, obj) {
+  return true;
+}
+
+var arr = [0, 1, 2];
+
+Object.defineProperty(arr, "2", {
+  get: function() {
+    return "unconfigurable";
+  },
+  configurable: false
+});
+
+Object.defineProperty(arr, "1", {
+  get: function() {
+    arr.length = 2;
+    return 1;
+  },
+  configurable: true
+});
+
+var newArr = arr.filter(callbackfn);
+
+assert.sameValue(newArr.length, 3, 'newArr.length');
+assert.sameValue(newArr[2], "unconfigurable", 'newArr[2]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-b-2.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-b-2.js
new file mode 100644
index 0000000000..051659aa81
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-b-2.js
@@ -0,0 +1,31 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+es5id: 15.4.4.20-9-b-2
+description: >
+    Array.prototype.filter - added properties in step 2 are visible
+    here
+---*/
+
+function callbackfn(val, idx, obj) {
+  return true;
+}
+
+var obj = {};
+
+Object.defineProperty(obj, "length", {
+  get: function() {
+    obj[2] = "length";
+    return 3;
+  },
+  configurable: true
+});
+
+var newArr = Array.prototype.filter.call(obj, callbackfn);
+
+assert.sameValue(newArr.length, 1, 'newArr.length');
+assert.sameValue(newArr[0], "length", 'newArr[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-b-3.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-b-3.js
new file mode 100644
index 0000000000..b9261879dd
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-b-3.js
@@ -0,0 +1,33 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+es5id: 15.4.4.20-9-b-3
+description: >
+    Array.prototype.filter - deleted properties in step 2 are visible
+    here
+---*/
+
+function callbackfn(val, idx, obj) {
+  return true;
+}
+var obj = {
+  2: 6.99,
+  8: 19
+};
+
+Object.defineProperty(obj, "length", {
+  get: function() {
+    delete obj[2];
+    return 10;
+  },
+  configurable: true
+});
+
+var newArr = Array.prototype.filter.call(obj, callbackfn);
+
+assert.sameValue(newArr.length, 1, 'newArr.length');
+assert.notSameValue(newArr[0], 6.99, 'newArr[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-b-4.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-b-4.js
new file mode 100644
index 0000000000..e2af2fac14
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-b-4.js
@@ -0,0 +1,38 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+es5id: 15.4.4.20-9-b-4
+description: >
+    Array.prototype.filter - properties added into own object after
+    current position are visited on an Array-like object
+---*/
+
+function callbackfn(val, idx, obj) {
+  return true;
+}
+
+var obj = {
+  length: 2
+};
+
+Object.defineProperty(obj, "0", {
+  get: function() {
+    Object.defineProperty(obj, "1", {
+      get: function() {
+        return 6.99;
+      },
+      configurable: true
+    });
+    return 0;
+  },
+  configurable: true
+});
+
+var newArr = Array.prototype.filter.call(obj, callbackfn);
+
+assert.sameValue(newArr.length, 2, 'newArr.length');
+assert.sameValue(newArr[1], 6.99, 'newArr[1]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-b-5.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-b-5.js
new file mode 100644
index 0000000000..0095c888a0
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-b-5.js
@@ -0,0 +1,36 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+es5id: 15.4.4.20-9-b-5
+description: >
+    Array.prototype.filter - properties added into own object after
+    current position are visited on an Array
+---*/
+
+function callbackfn(val, idx, obj) {
+  return true;
+}
+
+var arr = [0, , 2];
+
+Object.defineProperty(arr, "0", {
+  get: function() {
+    Object.defineProperty(arr, "1", {
+      get: function() {
+        return 6.99;
+      },
+      configurable: true
+    });
+    return 0;
+  },
+  configurable: true
+});
+
+var newArr = arr.filter(callbackfn);
+
+assert.sameValue(newArr.length, 3, 'newArr.length');
+assert.sameValue(newArr[1], 6.99, 'newArr[1]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-b-6.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-b-6.js
new file mode 100644
index 0000000000..acc9dfcb04
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-b-6.js
@@ -0,0 +1,37 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+es5id: 15.4.4.20-9-b-6
+description: >
+    Array.prototype.filter - properties can be added to prototype
+    after current position are visited on an Array-like object
+---*/
+
+function callbackfn(val, idx, obj) {
+  return true;
+}
+var obj = {
+  length: 2
+};
+
+Object.defineProperty(obj, "0", {
+  get: function() {
+    Object.defineProperty(Object.prototype, "1", {
+      get: function() {
+        return 6.99;
+      },
+      configurable: true
+    });
+    return 0;
+  },
+  configurable: true
+});
+
+var newArr = Array.prototype.filter.call(obj, callbackfn);
+
+assert.sameValue(newArr.length, 2, 'newArr.length');
+assert.sameValue(Array[1], 6.99, 'Array[1]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-b-7.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-b-7.js
new file mode 100644
index 0000000000..60f19c3b63
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-b-7.js
@@ -0,0 +1,35 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+es5id: 15.4.4.20-9-b-7
+description: >
+    Array.prototype.filter - properties can be added to prototype
+    after current position are visited on an Array
+---*/
+
+function callbackfn(val, idx, obj) {
+  return true;
+}
+var arr = [0, , 2];
+
+Object.defineProperty(arr, "0", {
+  get: function() {
+    Object.defineProperty(Array.prototype, "1", {
+      get: function() {
+        return 6.99;
+      },
+      configurable: true
+    });
+    return 0;
+  },
+  configurable: true
+});
+
+var newArr = arr.filter(callbackfn);
+
+assert.sameValue(newArr.length, 3, 'newArr.length');
+assert.sameValue(newArr[1], 6.99, 'newArr[1]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-b-8.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-b-8.js
new file mode 100644
index 0000000000..08b65a302d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-b-8.js
@@ -0,0 +1,42 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+es5id: 15.4.4.20-9-b-8
+description: >
+    Array.prototype.filter - deleting own property causes index
+    property not to be visited on an Array-like object
+---*/
+
+var accessed = false;
+var obj = {
+  length: 2
+};
+
+function callbackfn(val, idx, o) {
+  accessed = true;
+  return true;
+}
+
+Object.defineProperty(obj, "1", {
+  get: function() {
+    return 6.99;
+  },
+  configurable: true
+});
+
+Object.defineProperty(obj, "0", {
+  get: function() {
+    delete obj[1];
+    return 0;
+  },
+  configurable: true
+});
+
+var newArr = Array.prototype.filter.call(obj, callbackfn);
+
+assert.sameValue(newArr.length, 1, 'newArr.length');
+assert.sameValue(newArr[0], 0, 'newArr[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-b-9.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-b-9.js
new file mode 100644
index 0000000000..2e88dde503
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-b-9.js
@@ -0,0 +1,37 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+es5id: 15.4.4.20-9-b-9
+description: >
+    Array.prototype.filter - deleting own property causes index
+    property not to be visited on an Array
+---*/
+
+function callbackfn(val, idx, obj) {
+  return true;
+}
+var arr = [1, 2];
+
+Object.defineProperty(arr, "1", {
+  get: function() {
+    return "6.99";
+  },
+  configurable: true
+});
+
+Object.defineProperty(arr, "0", {
+  get: function() {
+    delete arr[1];
+    return 0;
+  },
+  configurable: true
+});
+
+var newArr = arr.filter(callbackfn);
+
+assert.sameValue(newArr.length, 1, 'newArr.length');
+assert.sameValue(newArr[0], 0, 'newArr[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-i-1.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-i-1.js
new file mode 100644
index 0000000000..8fae59879c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-i-1.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+es5id: 15.4.4.20-9-c-i-1
+description: >
+    Array.prototype.filter - element to be retrieved is own data
+    property on an Array-like object
+---*/
+
+var kValue = {};
+
+function callbackfn(val, idx, obj) {
+  return (idx === 5) && (val === kValue);
+}
+
+var obj = {
+  5: kValue,
+  length: 100
+};
+
+var newArr = Array.prototype.filter.call(obj, callbackfn);
+
+assert.sameValue(newArr.length, 1, 'newArr.length');
+assert.sameValue(newArr[0], kValue, 'newArr[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-i-10.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-i-10.js
new file mode 100644
index 0000000000..2407566e84
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-i-10.js
@@ -0,0 +1,29 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+es5id: 15.4.4.20-9-c-i-10
+description: >
+    Array.prototype.filter - element to be retrieved is own accessor
+    property on an Array
+---*/
+
+function callbackfn(val, idx, obj) {
+  return idx === 2 && val === 12;
+}
+
+var arr = [];
+
+Object.defineProperty(arr, "2", {
+  get: function() {
+    return 12;
+  },
+  configurable: true
+});
+var newArr = arr.filter(callbackfn);
+
+assert.sameValue(newArr.length, 1, 'newArr.length');
+assert.sameValue(newArr[0], 12, 'newArr[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-i-11.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-i-11.js
new file mode 100644
index 0000000000..2d36debda2
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-i-11.js
@@ -0,0 +1,39 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+es5id: 15.4.4.20-9-c-i-11
+description: >
+    Array.prototype.filter - element to be retrieved is own accessor
+    property that overrides an inherited data property on an
+    Array-like object
+---*/
+
+function callbackfn(val, idx, obj) {
+  return idx === 0 && val === 11;
+}
+
+var proto = {
+  0: 5,
+  1: 6
+};
+
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+child.length = 10;
+
+Object.defineProperty(child, "0", {
+  get: function() {
+    return 11;
+  },
+  configurable: true
+});
+var newArr = Array.prototype.filter.call(child, callbackfn);
+
+assert.sameValue(newArr.length, 1, 'newArr.length');
+assert.sameValue(newArr[0], 11, 'newArr[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-i-12.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-i-12.js
new file mode 100644
index 0000000000..b6fcffc65a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-i-12.js
@@ -0,0 +1,31 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+es5id: 15.4.4.20-9-c-i-12
+description: >
+    Array.prototype.filter - element to be retrieved is own accessor
+    property that overrides an inherited data property on an Array
+---*/
+
+function callbackfn(val, idx, obj) {
+  return val === 111 && idx === 0;
+}
+
+var arr = [];
+
+Array.prototype[0] = 10;
+
+Object.defineProperty(arr, "0", {
+  get: function() {
+    return 111;
+  },
+  configurable: true
+});
+var newArr = arr.filter(callbackfn);
+
+assert.sameValue(newArr.length, 1, 'newArr.length');
+assert.sameValue(newArr[0], 111, 'newArr[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-i-13.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-i-13.js
new file mode 100644
index 0000000000..ce0d6d9343
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-i-13.js
@@ -0,0 +1,43 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+es5id: 15.4.4.20-9-c-i-13
+description: >
+    Array.prototype.filter - element to be retrieved is own accessor
+    property that overrides an inherited accessor property on an
+    Array-like object
+---*/
+
+function callbackfn(val, idx, obj) {
+  return idx === 1 && val === 12;
+}
+
+var proto = {};
+
+Object.defineProperty(proto, "1", {
+  get: function() {
+    return 6;
+  },
+  configurable: true
+});
+
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+child.length = 10;
+
+Object.defineProperty(child, "1", {
+  get: function() {
+    return 12;
+  },
+  configurable: true
+});
+var newArr = Array.prototype.filter.call(child, callbackfn);
+
+assert.sameValue(newArr.length, 1, 'newArr.length');
+assert.sameValue(newArr[0], 12, 'newArr[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-i-14.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-i-14.js
new file mode 100644
index 0000000000..47fd5d8a2d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-i-14.js
@@ -0,0 +1,36 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+es5id: 15.4.4.20-9-c-i-14
+description: >
+    Array.prototype.filter - element to be retrieved is own accessor
+    property that overrides an inherited accessor property on an Array
+---*/
+
+function callbackfn(val, idx, obj) {
+  return idx === 0 && val === 11;
+}
+
+var arr = [];
+
+Object.defineProperty(Array.prototype, "0", {
+  get: function() {
+    return 5;
+  },
+  configurable: true
+});
+
+Object.defineProperty(arr, "0", {
+  get: function() {
+    return 11;
+  },
+  configurable: true
+});
+var newArr = arr.filter(callbackfn);
+
+assert.sameValue(newArr.length, 1, 'newArr.length');
+assert.sameValue(newArr[0], 11, 'newArr[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-i-15.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-i-15.js
new file mode 100644
index 0000000000..7f0b850f12
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-i-15.js
@@ -0,0 +1,34 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: >
+    Array.prototype.filter - element to be retrieved is inherited
+    accessor property on an Array-like object
+---*/
+
+function callbackfn(val, idx, obj) {
+  return val === 11 && idx === 1;
+}
+
+var proto = {};
+
+Object.defineProperty(proto, "1", {
+  get: function() {
+    return 11;
+  },
+  configurable: true
+});
+
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+child.length = 20;
+var newArr = Array.prototype.filter.call(child, callbackfn);
+
+assert.sameValue(newArr.length, 1, 'newArr.length');
+assert.sameValue(newArr[0], 11, 'newArr[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-i-16.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-i-16.js
new file mode 100644
index 0000000000..81290ab570
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-i-16.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: >
+    Array.prototype.filter - element to be retrieved is inherited
+    accessor property on an Array
+---*/
+
+function callbackfn(val, idx, obj) {
+  return idx === 0 && val === 11;
+}
+
+Object.defineProperty(Array.prototype, "0", {
+  get: function() {
+    return 11;
+  },
+  configurable: true
+});
+var newArr = [, , , ].filter(callbackfn);
+
+assert.sameValue(newArr.length, 1, 'newArr.length');
+assert.sameValue(newArr[0], 11, 'newArr[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-i-17.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-i-17.js
new file mode 100644
index 0000000000..2245f7fffb
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-i-17.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: >
+    Array.prototype.filter - element to be retrieved is own accessor
+    property without a get function on an Array-like object
+---*/
+
+function callbackfn(val, idx, obj) {
+  return undefined === val && idx === 1;
+}
+
+var obj = {
+  length: 2
+};
+Object.defineProperty(obj, "1", {
+  set: function() {},
+  configurable: true
+});
+
+var newArr = Array.prototype.filter.call(obj, callbackfn);
+
+assert.sameValue(newArr.length, 1, 'newArr.length');
+assert.sameValue(newArr[0], undefined, 'newArr[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-i-18.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-i-18.js
new file mode 100644
index 0000000000..d874ccc003
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-i-18.js
@@ -0,0 +1,27 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: >
+    Array.prototype.filter - element to be retrieved is own accessor
+    property without a get function on an Array
+---*/
+
+function callbackfn(val, idx, obj) {
+  return undefined === val && idx === 0;
+}
+
+var arr = [];
+
+Object.defineProperty(arr, "0", {
+  set: function() {},
+  configurable: true
+});
+
+var newArr = arr.filter(callbackfn);
+
+assert.sameValue(newArr.length, 1, 'newArr.length');
+assert.sameValue(newArr[0], undefined, 'newArr[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-i-19.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-i-19.js
new file mode 100644
index 0000000000..3c72bb4730
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-i-19.js
@@ -0,0 +1,30 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: >
+    Array.prototype.filter - element to be retrieved is own accessor
+    property without a get function that overrides an inherited
+    accessor property on an Array-like object
+---*/
+
+function callbackfn(val, idx, obj) {
+  return undefined === val && idx === 1;
+}
+
+var obj = {
+  length: 2
+};
+Object.defineProperty(obj, "1", {
+  set: function() {},
+  configurable: true
+});
+
+Object.prototype[1] = 10;
+var newArr = Array.prototype.filter.call(obj, callbackfn);
+
+assert.sameValue(newArr.length, 1, 'newArr.length');
+assert.sameValue(newArr[0], undefined, 'newArr[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-i-2.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-i-2.js
new file mode 100644
index 0000000000..d1653a9ee5
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-i-2.js
@@ -0,0 +1,22 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: >
+    Array.prototype.filter - element to be retrieved is own data
+    property on an Array
+---*/
+
+function callbackfn(val, idx, obj) {
+  if (idx === 0) {
+    return val === 11;
+  }
+}
+
+var newArr = [11].filter(callbackfn);
+
+assert.sameValue(newArr.length, 1, 'newArr.length');
+assert.sameValue(newArr[0], 11, 'newArr[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-i-20.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-i-20.js
new file mode 100644
index 0000000000..ed21997766
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-i-20.js
@@ -0,0 +1,29 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: >
+    Array.prototype.filter - element to be retrieved is own accessor
+    property without a get function that overrides an inherited
+    accessor property on an Array
+---*/
+
+function callbackfn(val, idx, obj) {
+  return undefined === val && idx === 0;
+}
+
+var arr = [];
+
+Object.defineProperty(arr, "0", {
+  set: function() {},
+  configurable: true
+});
+
+Array.prototype[0] = 100;
+var newArr = arr.filter(callbackfn);
+
+assert.sameValue(newArr.length, 1, 'newArr.length');
+assert.sameValue(newArr[0], undefined, 'newArr[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-i-21.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-i-21.js
new file mode 100644
index 0000000000..b666378c92
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-i-21.js
@@ -0,0 +1,31 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: >
+    Array.prototype.filter - element to be retrieved is inherited
+    accessor property without a get function on an Array-like object
+---*/
+
+function callbackfn(val, idx, obj) {
+  return val === undefined && idx === 1;
+}
+
+var proto = {};
+Object.defineProperty(proto, "1", {
+  set: function() {},
+  configurable: true
+});
+
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+child.length = 2;
+var newArr = Array.prototype.filter.call(child, callbackfn);
+
+assert.sameValue(newArr.length, 1, 'newArr.length');
+assert.sameValue(newArr[0], undefined, 'newArr[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-i-22.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-i-22.js
new file mode 100644
index 0000000000..e18f313a42
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-i-22.js
@@ -0,0 +1,24 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: >
+    Array.prototype.filter - element to be retrieved is inherited
+    accessor property without a get function on an Array
+---*/
+
+function callbackfn(val, idx, obj) {
+  return undefined === val && idx === 0;
+}
+
+Object.defineProperty(Array.prototype, "0", {
+  set: function() {},
+  configurable: true
+});
+var newArr = [, ].filter(callbackfn);
+
+assert.sameValue(newArr.length, 1, 'newArr.length');
+assert.sameValue(newArr[0], undefined, 'newArr[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-i-25.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-i-25.js
new file mode 100644
index 0000000000..718dfda7fd
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-i-25.js
@@ -0,0 +1,25 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: >
+    Array.prototype.filter - This object is the Arguments object which
+    implements its own property get method (number of arguments is
+    less than number of parameters)
+---*/
+
+function callbackfn(val, idx, obj) {
+  return val === 11 && idx === 0;
+}
+
+var func = function(a, b) {
+  return Array.prototype.filter.call(arguments, callbackfn);
+};
+
+var newArr = func(11);
+
+assert.sameValue(newArr.length, 1, 'newArr.length');
+assert.sameValue(newArr[0], 11, 'newArr[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-i-26.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-i-26.js
new file mode 100644
index 0000000000..e76d51b46d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-i-26.js
@@ -0,0 +1,31 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: >
+    Array.prototype.filter - This object is the Arguments object which
+    implements its own property get method (number of arguments equals
+    number of parameters)
+---*/
+
+function callbackfn(val, idx, obj) {
+  if (idx === 0) {
+    return val === 11;
+  } else if (idx === 1) {
+    return val === 9;
+  } else {
+    return false;
+  }
+}
+
+var func = function(a, b) {
+  return Array.prototype.filter.call(arguments, callbackfn);
+};
+var newArr = func(11, 9);
+
+assert.sameValue(newArr.length, 2, 'newArr.length');
+assert.sameValue(newArr[0], 11, 'newArr[0]');
+assert.sameValue(newArr[1], 9, 'newArr[1]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-i-27.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-i-27.js
new file mode 100644
index 0000000000..5da6560806
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-i-27.js
@@ -0,0 +1,34 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: >
+    Array.prototype.filter - This object is the Arguments object which
+    implements its own property get method (number of arguments is
+    greater than number of parameters)
+---*/
+
+function callbackfn(val, idx, obj) {
+  if (idx === 0) {
+    return val === 11;
+  } else if (idx === 1) {
+    return val === 12;
+  } else if (idx === 2) {
+    return val === 9;
+  } else {
+    return false;
+  }
+}
+
+var func = function(a, b) {
+  return Array.prototype.filter.call(arguments, callbackfn);
+};
+var newArr = func(11, 12, 9);
+
+assert.sameValue(newArr.length, 3, 'newArr.length');
+assert.sameValue(newArr[0], 11, 'newArr[0]');
+assert.sameValue(newArr[1], 12, 'newArr[1]');
+assert.sameValue(newArr[2], 9, 'newArr[2]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-i-28.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-i-28.js
new file mode 100644
index 0000000000..03f0b1b1b1
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-i-28.js
@@ -0,0 +1,41 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: >
+    Array.prototype.filter - element changed by getter on previous
+    iterations is observed on an Array
+---*/
+
+var preIterVisible = false;
+var arr = [];
+
+function callbackfn(val, idx, obj) {
+  return idx === 1 && val === 9;
+}
+
+Object.defineProperty(arr, "0", {
+  get: function() {
+    preIterVisible = true;
+    return 11;
+  },
+  configurable: true
+});
+
+Object.defineProperty(arr, "1", {
+  get: function() {
+    if (preIterVisible) {
+      return 9;
+    } else {
+      return 11;
+    }
+  },
+  configurable: true
+});
+var newArr = arr.filter(callbackfn);
+
+assert.sameValue(newArr.length, 1, 'newArr.length');
+assert.sameValue(newArr[0], 9, 'newArr[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-i-29.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-i-29.js
new file mode 100644
index 0000000000..9acdb8dae0
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-i-29.js
@@ -0,0 +1,43 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: >
+    Array.prototype.filter - element changed by getter on previous
+    iterations is observed on an Array-like object
+---*/
+
+function callbackfn(val, idx, obj) {
+  return val === 9 && idx === 1;
+}
+
+var preIterVisible = false;
+var obj = {
+  length: 2
+};
+
+Object.defineProperty(obj, "0", {
+  get: function() {
+    preIterVisible = true;
+    return 11;
+  },
+  configurable: true
+});
+
+Object.defineProperty(obj, "1", {
+  get: function() {
+    if (preIterVisible) {
+      return 9;
+    } else {
+      return 13;
+    }
+  },
+  configurable: true
+});
+var newArr = Array.prototype.filter.call(obj, callbackfn);
+
+assert.sameValue(newArr.length, 1, 'newArr.length');
+assert.sameValue(newArr[0], 9, 'newArr[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-i-3.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-i-3.js
new file mode 100644
index 0000000000..ce8a21e6c7
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-i-3.js
@@ -0,0 +1,33 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: >
+    Array.prototype.filter - element to be retrieved is own data
+    property that overrides an inherited data property on an
+    Array-like object
+---*/
+
+function callbackfn(val, idx, obj) {
+  return (idx === 5) && (val === "abc");
+}
+
+var proto = {
+  0: 11,
+  5: 100
+};
+
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+child[5] = "abc";
+child.length = 10;
+
+var newArr = Array.prototype.filter.call(child, callbackfn);
+
+assert.sameValue(newArr.length, 1, 'newArr.length');
+assert.sameValue(newArr[0], "abc", 'newArr[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-i-30.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-i-30.js
new file mode 100644
index 0000000000..6e85b19ef7
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-i-30.js
@@ -0,0 +1,37 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: >
+    Array.prototype.filter - unnhandled exceptions happened in getter
+    terminate iteration on an Array-like object
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  if (idx > 1) {
+    accessed = true;
+  }
+  return true;
+}
+
+var obj = {
+  0: 11,
+  5: 10,
+  10: 8,
+  length: 20
+};
+Object.defineProperty(obj, "1", {
+  get: function() {
+    throw new RangeError("unhandle exception happened in getter");
+  },
+  configurable: true
+});
+assert.throws(RangeError, function() {
+  Array.prototype.filter.call(obj, callbackfn);
+});
+assert.sameValue(accessed, false, 'accessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-i-31.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-i-31.js
new file mode 100644
index 0000000000..d4ca7989db
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-i-31.js
@@ -0,0 +1,35 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: >
+    Array.prototype.filter - unnhandled exceptions happened in getter
+    terminate iteration on an Array
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  if (idx > 1) {
+    accessed = true;
+  }
+  return true;
+}
+
+var arr = [];
+arr[5] = 10;
+arr[10] = 100;
+
+Object.defineProperty(arr, "1", {
+  get: function() {
+    throw new RangeError("unhandle exception happened in getter");
+  },
+  configurable: true
+});
+assert.throws(RangeError, function() {
+  arr.filter(callbackfn);
+});
+assert.sameValue(accessed, false, 'accessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-i-4.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-i-4.js
new file mode 100644
index 0000000000..5cf957322c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-i-4.js
@@ -0,0 +1,21 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: >
+    Array.prototype.filter - element to be retrieved is own data
+    property that overrides an inherited data property on an Array
+---*/
+
+function callbackfn(val, idx, obj) {
+  return (idx === 0) && (val === 12);
+}
+
+Array.prototype[0] = 11;
+var newArr = [12].filter(callbackfn);
+
+assert.sameValue(newArr.length, 1, 'newArr.length');
+assert.sameValue(newArr[0], 12, 'newArr[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-i-5.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-i-5.js
new file mode 100644
index 0000000000..3bc9704ed2
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-i-5.js
@@ -0,0 +1,41 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: >
+    Array.prototype.filter - element to be retrieved is own data
+    property that overrides an inherited accessor property on an
+    Array-like object
+---*/
+
+function callbackfn(val, idx, obj) {
+  return idx === 0 && val === 11;
+}
+
+var proto = {};
+
+Object.defineProperty(proto, "0", {
+  get: function() {
+    return 5;
+  },
+  configurable: true
+});
+
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+child.length = 2;
+Object.defineProperty(child, "0", {
+  value: 11,
+  configurable: true
+});
+child[1] = 12;
+
+var newArr = Array.prototype.filter.call(child, callbackfn);
+
+assert.sameValue(newArr.length, 1, 'newArr.length');
+assert.sameValue(newArr[0], 11, 'newArr[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-i-6.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-i-6.js
new file mode 100644
index 0000000000..b71fded79d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-i-6.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: >
+    Array.prototype.filter - element to be retrieved is own data
+    property that overrides an inherited accessor property on an Array
+---*/
+
+function callbackfn(val, idx, obj) {
+  return val === 11;
+}
+
+Object.defineProperty(Array.prototype, "0", {
+  get: function() {
+    return 9;
+  },
+  configurable: true
+});
+var newArr = [11].filter(callbackfn);
+
+assert.sameValue(newArr.length, 1, 'newArr.length');
+assert.sameValue(newArr[0], 11, 'newArr[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-i-7.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-i-7.js
new file mode 100644
index 0000000000..b0bcff3e14
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-i-7.js
@@ -0,0 +1,32 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: >
+    Array.prototype.filter - element to be retrieved is inherited data
+    property on an Array-like object
+---*/
+
+var kValue = 'abc';
+
+function callbackfn(val, idx, obj) {
+  return (idx === 5) && (val === kValue);
+}
+
+var proto = {
+  5: kValue
+};
+
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+child.length = 10;
+
+var newArr = Array.prototype.filter.call(child, callbackfn);
+
+assert.sameValue(newArr.length, 1, 'newArr.length');
+assert.sameValue(newArr[0], kValue, 'newArr[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-i-8.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-i-8.js
new file mode 100644
index 0000000000..26edd8cf3f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-i-8.js
@@ -0,0 +1,21 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: >
+    Array.prototype.filter - element to be retrieved is inherited data
+    property on an Array
+---*/
+
+function callbackfn(val, idx, obj) {
+  return (idx === 1) && (val === 13);
+}
+
+Array.prototype[1] = 13;
+var newArr = [, , , ].filter(callbackfn);
+
+assert.sameValue(newArr.length, 1, 'newArr.length');
+assert.sameValue(newArr[0], 13, 'newArr[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-i-9.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-i-9.js
new file mode 100644
index 0000000000..33563fe84b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-i-9.js
@@ -0,0 +1,32 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: >
+    Array.prototype.filter - element to be retrieved is own accessor
+    property on an Array-like object
+---*/
+
+function callbackfn(val, idx, obj) {
+  return (idx === 0) && (val === 11);
+}
+
+var obj = {
+  10: 10,
+  length: 20
+};
+
+Object.defineProperty(obj, "0", {
+  get: function() {
+    return 11;
+  },
+  configurable: true
+});
+
+var newArr = Array.prototype.filter.call(obj, callbackfn);
+
+assert.sameValue(newArr.length, 1, 'newArr.length');
+assert.sameValue(newArr[0], 11, 'newArr[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-ii-1.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-ii-1.js
new file mode 100644
index 0000000000..fe654e1055
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-ii-1.js
@@ -0,0 +1,27 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: Array.prototype.filter - callbackfn called with correct parameters
+---*/
+
+var bPar = true;
+var bCalled = false;
+
+function callbackfn(val, idx, obj)
+{
+  bCalled = true;
+  if (obj[idx] !== val)
+    bPar = false;
+}
+
+var srcArr = [0, 1, true, null, new Object(), "five"];
+srcArr[999999] = -6.6;
+var resArr = srcArr.filter(callbackfn);
+
+
+assert.sameValue(bCalled, true, 'bCalled');
+assert.sameValue(bPar, true, 'bPar');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-ii-10.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-ii-10.js
new file mode 100644
index 0000000000..b1256bd8f8
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-ii-10.js
@@ -0,0 +1,19 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: >
+    Array.prototype.filter - callbackfn is called with 1 formal
+    parameter
+---*/
+
+function callbackfn(val) {
+  return val > 10;
+}
+var newArr = [12].filter(callbackfn);
+
+assert.sameValue(newArr.length, 1, 'newArr.length');
+assert.sameValue(newArr[0], 12, 'newArr[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-ii-11.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-ii-11.js
new file mode 100644
index 0000000000..c698738aa1
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-ii-11.js
@@ -0,0 +1,19 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: >
+    Array.prototype.filter - callbackfn is called with 2 formal
+    parameter
+---*/
+
+function callbackfn(val, idx) {
+  return val > 10 && arguments[2][idx] === val;
+}
+var newArr = [11].filter(callbackfn);
+
+assert.sameValue(newArr.length, 1, 'newArr.length');
+assert.sameValue(newArr[0], 11, 'newArr[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-ii-12.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-ii-12.js
new file mode 100644
index 0000000000..6eab263f20
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-ii-12.js
@@ -0,0 +1,19 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: >
+    Array.prototype.filter - callbackfn is called with 3 formal
+    parameter
+---*/
+
+function callbackfn(val, idx, obj) {
+  return val > 10 && obj[idx] === val;
+}
+var newArr = [11].filter(callbackfn);
+
+assert.sameValue(newArr.length, 1, 'newArr.length');
+assert.sameValue(newArr[0], 11, 'newArr[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-ii-13.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-ii-13.js
new file mode 100644
index 0000000000..c1c273a5f0
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-ii-13.js
@@ -0,0 +1,19 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: >
+    Array.prototype.filter - callbackfn that uses arguments object to
+    get parameter value
+---*/
+
+function callbackfn() {
+  return arguments[2][arguments[1]] === arguments[0];
+}
+var newArr = [11].filter(callbackfn);
+
+assert.sameValue(newArr.length, 1, 'newArr.length');
+assert.sameValue(newArr[0], 11, 'newArr[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-ii-16.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-ii-16.js
new file mode 100644
index 0000000000..a5037a7db3
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-ii-16.js
@@ -0,0 +1,24 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: >
+    Array.prototype.filter - 'this' of 'callbackfn' is a Boolean
+    object when T is not an object (T is a boolean)
+---*/
+
+function callbackfn(val, idx, obj) {
+  return this.valueOf() === false;
+}
+
+var obj = {
+  0: 11,
+  length: 2
+};
+var newArr = Array.prototype.filter.call(obj, callbackfn, false);
+
+assert.sameValue(newArr.length, 1, 'newArr.length');
+assert.sameValue(newArr[0], 11, 'newArr[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-ii-17.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-ii-17.js
new file mode 100644
index 0000000000..a31e0c995d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-ii-17.js
@@ -0,0 +1,24 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: >
+    Array.prototype.filter -'this' of 'callbackfn' is a Number object
+    when T is not an object (T is a number)
+---*/
+
+function callbackfn(val, idx, o) {
+  return 5 === this.valueOf();
+}
+
+var obj = {
+  0: 11,
+  length: 2
+};
+var newArr = Array.prototype.filter.call(obj, callbackfn, 5);
+
+assert.sameValue(newArr.length, 1, 'newArr.length');
+assert.sameValue(newArr[0], 11, 'newArr[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-ii-18.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-ii-18.js
new file mode 100644
index 0000000000..c3d0237bf2
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-ii-18.js
@@ -0,0 +1,24 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: >
+    Array.prototype.filter - 'this' of 'callbackfn' is an String
+    object when T is not an object (T is a string)
+---*/
+
+function callbackfn(val, idx, obj) {
+  return 'hello' === this.valueOf();
+}
+
+var obj = {
+  0: 11,
+  length: 2
+};
+var newArr = Array.prototype.filter.call(obj, callbackfn, "hello");
+
+assert.sameValue(newArr.length, 1, 'newArr.length');
+assert.sameValue(newArr[0], 11, 'newArr[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-ii-19.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-ii-19.js
new file mode 100644
index 0000000000..caf9d7c13e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-ii-19.js
@@ -0,0 +1,27 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: Array.prototype.filter - non-indexed properties are not called
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return val === 8;
+}
+
+var obj = {
+  0: 11,
+  non_index_property: 8,
+  2: 5,
+  length: 20
+};
+var newArr = Array.prototype.filter.call(obj, callbackfn);
+
+assert.sameValue(newArr.length, 0, 'newArr.length');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-ii-2.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-ii-2.js
new file mode 100644
index 0000000000..4165794019
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-ii-2.js
@@ -0,0 +1,25 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: Array.prototype.filter - callbackfn takes 3 arguments
+---*/
+
+var parCnt = 3;
+var bCalled = false
+
+function callbackfn(val, idx, obj)
+{
+  bCalled = true;
+  if (arguments.length !== 3)
+    parCnt = arguments.length; //verify if callbackfn was called with 3 parameters
+}
+
+var srcArr = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9];
+var resArr = srcArr.filter(callbackfn);
+
+assert.sameValue(bCalled, true, 'bCalled');
+assert.sameValue(parCnt, 3, 'parCnt');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-ii-20.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-ii-20.js
new file mode 100644
index 0000000000..922371250c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-ii-20.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: >
+    Array.prototype.filter - callbackfn called with correct parameters
+    (thisArg is correct)
+---*/
+
+var thisArg = {
+  threshold: 10
+};
+
+function callbackfn(val, idx, obj) {
+  return this === thisArg;
+}
+
+var obj = {
+  0: 11,
+  length: 1
+};
+var newArr = Array.prototype.filter.call(obj, callbackfn, thisArg);
+
+assert.sameValue(newArr.length, 1, 'newArr.length');
+assert.sameValue(newArr[0], 11, 'newArr[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-ii-21.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-ii-21.js
new file mode 100644
index 0000000000..866144fbd2
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-ii-21.js
@@ -0,0 +1,34 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: >
+    Array.prototype.filter - callbackfn called with correct parameters
+    (kValue is correct)
+---*/
+
+function callbackfn(val, idx, obj) {
+  if (idx === 0) {
+    return val === 11;
+  }
+
+  if (idx === 1) {
+    return val === 12;
+  }
+
+  return false;
+}
+
+var obj = {
+  0: 11,
+  1: 12,
+  length: 2
+};
+var newArr = Array.prototype.filter.call(obj, callbackfn);
+
+assert.sameValue(newArr.length, 2, 'newArr.length');
+assert.sameValue(newArr[0], 11, 'newArr[0]');
+assert.sameValue(newArr[1], 12, 'newArr[1]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-ii-22.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-ii-22.js
new file mode 100644
index 0000000000..38c78e20af
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-ii-22.js
@@ -0,0 +1,34 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: >
+    Array.prototype.filter - callbackfn called with correct parameters
+    (the index k is correct)
+---*/
+
+function callbackfn(val, idx, obj) {
+  if (val === 11) {
+    return idx === 0;
+  }
+
+  if (val === 12) {
+    return idx === 1;
+  }
+
+  return false;
+}
+
+var obj = {
+  0: 11,
+  1: 12,
+  length: 2
+};
+var newArr = Array.prototype.filter.call(obj, callbackfn);
+
+assert.sameValue(newArr.length, 2, 'newArr.length');
+assert.sameValue(newArr[0], 11, 'newArr[0]');
+assert.sameValue(newArr[1], 12, 'newArr[1]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-ii-23.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-ii-23.js
new file mode 100644
index 0000000000..2bc0f778f0
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-ii-23.js
@@ -0,0 +1,25 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: >
+    Array.prototype.filter - callbackfn called with correct parameters
+    (this object O is correct)
+---*/
+
+var obj = {
+  0: 11,
+  length: 2
+};
+
+function callbackfn(val, idx, o) {
+  return obj === o;
+}
+
+var newArr = Array.prototype.filter.call(obj, callbackfn);
+
+assert.sameValue(newArr.length, 1, 'newArr.length');
+assert.sameValue(newArr[0], 11, 'newArr[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-ii-4.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-ii-4.js
new file mode 100644
index 0000000000..7244da2879
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-ii-4.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: >
+    Array.prototype.filter - k values are passed in ascending numeric
+    order
+---*/
+
+var arr = [0, 1, 2, 3, 4, 5];
+var lastIdx = 0;
+var called = 0;
+
+function callbackfn(val, idx, o) {
+  called++;
+  if (lastIdx !== idx) {
+    return false;
+  } else {
+    lastIdx++;
+    return true;
+  }
+}
+var newArr = arr.filter(callbackfn);
+
+assert.sameValue(newArr.length, called, 'newArr.length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-ii-5.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-ii-5.js
new file mode 100644
index 0000000000..277c5acf61
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-ii-5.js
@@ -0,0 +1,34 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: >
+    Array.prototype.filter - k values are accessed during each
+    iteration and not prior to starting the loop on an Array
+---*/
+
+var kIndex = [];
+var called = 0;
+
+//By below way, we could verify that k would be setted as 0, 1, ..., length - 1 in order, and each value will be setted one time.
+function callbackfn(val, idx, obj) {
+  called++;
+  //Each position should be visited one time, which means k is accessed one time during iterations.
+  if (kIndex[idx] === undefined) {
+    //when current position is visited, its previous index should has been visited.
+    if (idx !== 0 && kIndex[idx - 1] === undefined) {
+      return true;
+    }
+    kIndex[idx] = 1;
+    return false;
+  } else {
+    return true;
+  }
+}
+var newArr = [11, 12, 13, 14].filter(callbackfn, undefined);
+
+assert.sameValue(newArr.length, 0, 'newArr.length');
+assert.sameValue(called, 4, 'called');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-ii-6.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-ii-6.js
new file mode 100644
index 0000000000..d2df7c598b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-ii-6.js
@@ -0,0 +1,29 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: >
+    Array.prototype.filter - arguments to callbackfn are self
+    consistent
+---*/
+
+var obj = {
+  0: 11,
+  length: 1
+};
+var thisArg = {};
+
+function callbackfn() {
+  return this === thisArg &&
+    arguments[0] === 11 &&
+    arguments[1] === 0 &&
+    arguments[2] === obj;
+}
+
+var newArr = Array.prototype.filter.call(obj, callbackfn, thisArg);
+
+assert.sameValue(newArr.length, 1, 'newArr.length');
+assert.sameValue(newArr[0], 11, 'newArr[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-ii-7.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-ii-7.js
new file mode 100644
index 0000000000..825c76941d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-ii-7.js
@@ -0,0 +1,32 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: >
+    Array.prototype.filter - unhandled exceptions happened in
+    callbackfn terminate iteration
+---*/
+
+var called = 0;
+
+function callbackfn(val, idx, obj) {
+  called++;
+  if (called === 1) {
+    throw new Error("Exception occurred in callbackfn");
+  }
+  return true;
+}
+
+var obj = {
+  0: 11,
+  4: 10,
+  10: 8,
+  length: 20
+};
+assert.throws(Error, function() {
+  Array.prototype.filter.call(obj, callbackfn);
+});
+assert.sameValue(called, 1, 'called');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-ii-8.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-ii-8.js
new file mode 100644
index 0000000000..15741a6d34
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-ii-8.js
@@ -0,0 +1,29 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: >
+    Array.prototype.filter - element changed by callbackfn on previous
+    iterations is observed
+---*/
+
+var obj = {
+  0: 11,
+  1: 12,
+  length: 2
+};
+
+function callbackfn(val, idx, o) {
+  if (idx === 0) {
+    obj[idx + 1] = 8;
+  }
+  return val > 10;
+}
+
+var newArr = Array.prototype.filter.call(obj, callbackfn);
+
+assert.sameValue(newArr.length, 1, 'newArr.length');
+assert.sameValue(newArr[0], 11, 'newArr[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-ii-9.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-ii-9.js
new file mode 100644
index 0000000000..11c144921f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-ii-9.js
@@ -0,0 +1,19 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: >
+    Array.prototype.filter - callbackfn is called with 0 formal
+    parameter
+---*/
+
+function callbackfn() {
+  return true;
+}
+var newArr = [11].filter(callbackfn);
+
+assert.sameValue(newArr.length, 1, 'newArr.length');
+assert.sameValue(newArr[0], 11, 'newArr[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-iii-1-1.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-iii-1-1.js
new file mode 100644
index 0000000000..a7f966813a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-iii-1-1.js
@@ -0,0 +1,25 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: >
+    Array.prototype.filter - value of returned array element equals to
+    'kValue'
+---*/
+
+function callbackfn(val, idx, obj) {
+  return true;
+}
+
+var obj = {
+  0: 11,
+  1: 9,
+  length: 2
+};
+var newArr = Array.prototype.filter.call(obj, callbackfn);
+
+assert.sameValue(newArr[0], obj[0], 'newArr[0]');
+assert.sameValue(newArr[1], obj[1], 'newArr[1]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-iii-1-2.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-iii-1-2.js
new file mode 100644
index 0000000000..6dfdc285d7
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-iii-1-2.js
@@ -0,0 +1,27 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: >
+    Array.prototype.filter - value of returned array element can be
+    overwritten
+---*/
+
+function callbackfn(val, idx, obj) {
+  return true;
+}
+
+var obj = {
+  0: 11,
+  1: 9,
+  length: 2
+};
+var newArr = Array.prototype.filter.call(obj, callbackfn);
+
+var tempVal = newArr[1];
+newArr[1] += 1;
+
+assert.notSameValue(newArr[1], tempVal, 'newArr[1]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-iii-1-3.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-iii-1-3.js
new file mode 100644
index 0000000000..6b66f5f114
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-iii-1-3.js
@@ -0,0 +1,33 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: >
+    Array.prototype.filter - value of returned array element can be
+    enumerated
+---*/
+
+function callbackfn(val, idx, obj) {
+  return true;
+}
+
+var obj = {
+  0: 11,
+  length: 2
+};
+var newArr = Array.prototype.filter.call(obj, callbackfn);
+
+var prop;
+var enumerable = false;
+for (prop in newArr) {
+  if (newArr.hasOwnProperty(prop)) {
+    if (prop === "0") {
+      enumerable = true;
+    }
+  }
+}
+
+assert(enumerable, 'enumerable !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-iii-1-4.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-iii-1-4.js
new file mode 100644
index 0000000000..df599b8bfa
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-iii-1-4.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: >
+    Array.prototype.filter - value of returned array element can be
+    changed or deleted
+---*/
+
+function callbackfn(val, idx, obj) {
+  return true;
+}
+
+var obj = {
+  0: 11,
+  1: 9,
+  length: 2
+};
+var newArr = Array.prototype.filter.call(obj, callbackfn);
+
+var tempVal = newArr[1];
+delete newArr[1];
+
+assert.notSameValue(tempVal, undefined, 'tempVal');
+assert.sameValue(newArr[1], undefined, 'newArr[1]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-iii-1-5.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-iii-1-5.js
new file mode 100644
index 0000000000..3bd6dcc5cb
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-iii-1-5.js
@@ -0,0 +1,29 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: >
+    Array.prototype.filter - values of 'to' are passed in acending
+    numeric order
+---*/
+
+var arr = [0, 1, 2, 3, 4];
+var lastToIdx = 0;
+var called = 0;
+
+function callbackfn(val, idx, obj) {
+  called++;
+  if (lastToIdx !== idx) {
+    return false;
+  } else {
+    lastToIdx++;
+    return true;
+  }
+}
+var newArr = arr.filter(callbackfn);
+
+assert.sameValue(newArr.length, 5, 'newArr.length');
+assert.sameValue(called, 5, 'called');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-iii-1-6.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-iii-1-6.js
new file mode 100644
index 0000000000..1ff610ed7f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-iii-1-6.js
@@ -0,0 +1,35 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: >
+    Array.prototype.filter - values of 'to' are accessed during each
+    iteration when 'selected' is converted to true and not prior to
+    starting the loop
+---*/
+
+var toIndex = [];
+var called = 0;
+
+//By below way, we could verify that 'to' would be setted as 0, 1, ..., length - 1 in order, and each value will be setted one time.
+function callbackfn(val, idx, obj) {
+  called++;
+  //Each position should be visited one time, which means 'to' is accessed one time during iterations.
+  if (toIndex[idx] === undefined) {
+    //when current position is visited, its previous index should has been visited.
+    if (idx !== 0 && toIndex[idx - 1] === undefined) {
+      return false;
+    }
+    toIndex[idx] = 1;
+    return true;
+  } else {
+    return false;
+  }
+}
+var newArr = [11, 12, 13, 14].filter(callbackfn, undefined);
+
+assert.sameValue(newArr.length, 4, 'newArr.length');
+assert.sameValue(called, 4, 'called');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-iii-1.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-iii-1.js
new file mode 100644
index 0000000000..b50fe6d2f1
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-iii-1.js
@@ -0,0 +1,29 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: >
+    Array.prototype.filter - getOwnPropertyDescriptor(all true) of
+    returned array element
+---*/
+
+function callbackfn(val, idx, obj) {
+  if (val % 2)
+    return true;
+  else
+    return false;
+}
+var srcArr = [0, 1, 2, 3, 4];
+var resArr = srcArr.filter(callbackfn);
+
+assert(resArr.length > 0, 'resArr.length > 0');
+
+var desc = Object.getOwnPropertyDescriptor(resArr, 1);
+
+assert.sameValue(desc.value, 3, 'desc.value'); //srcArr[1] = true
+assert.sameValue(desc.writable, true, 'desc.writable');
+assert.sameValue(desc.enumerable, true, 'desc.enumerable');
+assert.sameValue(desc.configurable, true, 'desc.configurable');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-iii-10.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-iii-10.js
new file mode 100644
index 0000000000..b45947f805
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-iii-10.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: >
+    Array.prototype.filter return value of callbackfn is a number
+    (value is negative number)
+---*/
+
+function callbackfn(val, idx, obj) {
+  return -5;
+}
+
+var newArr = [11].filter(callbackfn);
+
+assert.sameValue(newArr.length, 1, 'newArr.length');
+assert.sameValue(newArr[0], 11, 'newArr[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-iii-11.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-iii-11.js
new file mode 100644
index 0000000000..31c26199c6
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-iii-11.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: >
+    Array.prototype.filter return value of callbackfn is a number
+    (value is Infinity)
+---*/
+
+function callbackfn(val, idx, obj) {
+  return Infinity;
+}
+
+var newArr = [11].filter(callbackfn);
+
+assert.sameValue(newArr.length, 1, 'newArr.length');
+assert.sameValue(newArr[0], 11, 'newArr[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-iii-12.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-iii-12.js
new file mode 100644
index 0000000000..8fd6b71d46
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-iii-12.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: >
+    Array.prototype.filter return value of callbackfn is a number
+    (value is -Infinity)
+---*/
+
+function callbackfn(val, idx, obj) {
+  return -Infinity;
+}
+
+var newArr = [11].filter(callbackfn);
+
+assert.sameValue(newArr.length, 1, 'newArr.length');
+assert.sameValue(newArr[0], 11, 'newArr[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-iii-13.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-iii-13.js
new file mode 100644
index 0000000000..93770cfb67
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-iii-13.js
@@ -0,0 +1,23 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: >
+    Array.prototype.filter return value of callbackfn is a number
+    (value is NaN)
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return NaN;
+}
+
+var newArr = [11].filter(callbackfn);
+
+assert.sameValue(newArr.length, 0, 'newArr.length');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-iii-14.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-iii-14.js
new file mode 100644
index 0000000000..36884f363c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-iii-14.js
@@ -0,0 +1,23 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: >
+    Array.prototype.filter return value of callbackfn is an empty
+    string
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return "";
+}
+
+var newArr = [11].filter(callbackfn);
+
+assert.sameValue(newArr.length, 0, 'newArr.length');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-iii-15.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-iii-15.js
new file mode 100644
index 0000000000..dd791bbe27
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-iii-15.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: >
+    Array.prototype.filter return value of callbackfn is a non-empty
+    string
+---*/
+
+function callbackfn(val, idx, obj) {
+  return "non-empty string";
+}
+
+var newArr = [11].filter(callbackfn);
+
+assert.sameValue(newArr.length, 1, 'newArr.length');
+assert.sameValue(newArr[0], 11, 'newArr[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-iii-16.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-iii-16.js
new file mode 100644
index 0000000000..cde900a1d0
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-iii-16.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: >
+    Array.prototype.filter return value of callbackfn is a Function
+    object
+---*/
+
+function callbackfn(val, idx, obj) {
+  return function() {};
+}
+
+var newArr = [11].filter(callbackfn);
+
+assert.sameValue(newArr.length, 1, 'newArr.length');
+assert.sameValue(newArr[0], 11, 'newArr[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-iii-17.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-iii-17.js
new file mode 100644
index 0000000000..7555efa70c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-iii-17.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: >
+    Array.prototype.filter return value of callbackfn is an Array
+    object
+---*/
+
+function callbackfn(val, idx, obj) {
+  return new Array(10);
+}
+
+var newArr = [11].filter(callbackfn);
+
+assert.sameValue(newArr.length, 1, 'newArr.length');
+assert.sameValue(newArr[0], 11, 'newArr[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-iii-18.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-iii-18.js
new file mode 100644
index 0000000000..8240f69cfc
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-iii-18.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: >
+    Array.prototype.filter return value of callbackfn is a String
+    object
+---*/
+
+function callbackfn(val, idx, obj) {
+  return new String();
+}
+
+var newArr = [11].filter(callbackfn);
+
+assert.sameValue(newArr.length, 1, 'newArr.length');
+assert.sameValue(newArr[0], 11, 'newArr[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-iii-19.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-iii-19.js
new file mode 100644
index 0000000000..cb47321ea4
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-iii-19.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: >
+    Array.prototype.filter return value of callbackfn is a Boolean
+    object
+---*/
+
+function callbackfn(val, idx, obj) {
+  return new Boolean();
+}
+
+var newArr = [11].filter(callbackfn);
+
+assert.sameValue(newArr.length, 1, 'newArr.length');
+assert.sameValue(newArr[0], 11, 'newArr[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-iii-2.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-iii-2.js
new file mode 100644
index 0000000000..9a6f784bf2
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-iii-2.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: Array.prototype.filter - return value of callbackfn is undefined
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, o) {
+  accessed = true;
+  return undefined;
+}
+
+var obj = {
+  0: 11,
+  length: 1
+};
+
+var newArr = Array.prototype.filter.call(obj, callbackfn);
+
+assert.sameValue(newArr.length, 0, 'newArr.length');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-iii-20.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-iii-20.js
new file mode 100644
index 0000000000..09a90a5db9
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-iii-20.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: >
+    Array.prototype.filter - return value of callbackfn is a Number
+    object
+---*/
+
+function callbackfn(val, idx, obj) {
+  return new Number();
+}
+
+var newArr = [11].filter(callbackfn);
+
+assert.sameValue(newArr.length, 1, 'newArr.length');
+assert.sameValue(newArr[0], 11, 'newArr[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-iii-21.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-iii-21.js
new file mode 100644
index 0000000000..222219ecd3
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-iii-21.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: >
+    Array.prototype.filter - return value of callbackfn is the Math
+    object
+---*/
+
+function callbackfn(val, idx, obj) {
+  return Math;
+}
+
+var newArr = [11].filter(callbackfn);
+
+assert.sameValue(newArr.length, 1, 'newArr.length');
+assert.sameValue(newArr[0], 11, 'newArr[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-iii-22.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-iii-22.js
new file mode 100644
index 0000000000..d935e2d12f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-iii-22.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: >
+    Array.prototype.filter - return value of callbackfn is a Date
+    object
+---*/
+
+function callbackfn(val, idx, obj) {
+  return new Date();
+}
+
+var newArr = [11].filter(callbackfn);
+
+assert.sameValue(newArr.length, 1, 'newArr.length');
+assert.sameValue(newArr[0], 11, 'newArr[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-iii-23.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-iii-23.js
new file mode 100644
index 0000000000..7ddcfd05c2
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-iii-23.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: >
+    Array.prototype.filter - return value of callbackfn is a RegExp
+    object
+---*/
+
+function callbackfn(val, idx, obj) {
+  return new RegExp();
+}
+
+var newArr = [11].filter(callbackfn);
+
+assert.sameValue(newArr.length, 1, 'newArr.length');
+assert.sameValue(newArr[0], 11, 'newArr[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-iii-24.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-iii-24.js
new file mode 100644
index 0000000000..99df34f35a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-iii-24.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: >
+    Array.prototype.filter - return value of callbackfn is the JSON
+    object
+---*/
+
+function callbackfn(val, idx, obj) {
+  return JSON;
+}
+
+var newArr = [11].filter(callbackfn);
+
+assert.sameValue(newArr.length, 1, 'newArr.length');
+assert.sameValue(newArr[0], 11, 'newArr[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-iii-25.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-iii-25.js
new file mode 100644
index 0000000000..7d83be14e6
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-iii-25.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: >
+    Array.prototype.filter - return value of callbackfn is an Error
+    object
+---*/
+
+function callbackfn(val, idx, obj) {
+  return new EvalError();
+}
+
+var newArr = [11].filter(callbackfn);
+
+assert.sameValue(newArr.length, 1, 'newArr.length');
+assert.sameValue(newArr[0], 11, 'newArr[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-iii-26.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-iii-26.js
new file mode 100644
index 0000000000..bcbd116e10
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-iii-26.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: >
+    Array.prototype.filter - return value of callbackfn is the
+    Arguments object
+---*/
+
+function callbackfn(val, idx, obj) {
+  return arguments;
+}
+
+var newArr = [11].filter(callbackfn);
+
+assert.sameValue(newArr.length, 1, 'newArr.length');
+assert.sameValue(newArr[0], 11, 'newArr[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-iii-28.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-iii-28.js
new file mode 100644
index 0000000000..990d93dfe2
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-iii-28.js
@@ -0,0 +1,22 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: >
+    Array.prototype.filter - return value of callbackfn is the global
+    object
+---*/
+
+var global = this;
+
+function callbackfn(val, idx, obj) {
+  return global;
+}
+
+var newArr = [11].filter(callbackfn);
+
+assert.sameValue(newArr.length, 1, 'newArr.length');
+assert.sameValue(newArr[0], 11, 'newArr[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-iii-29.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-iii-29.js
new file mode 100644
index 0000000000..a07954a33f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-iii-29.js
@@ -0,0 +1,30 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: >
+    Array.prototype.filter - false prevents element added to output
+    Array
+---*/
+
+var called = 0;
+
+function callbackfn(val, idx, obj) {
+  called++;
+  return val > 10;
+}
+
+var obj = {
+  0: 11,
+  1: 8,
+  length: 20
+};
+
+var newArr = Array.prototype.filter.call(obj, callbackfn);
+
+assert.sameValue(newArr.length, 1, 'newArr.length');
+assert.notSameValue(newArr[0], 8, 'newArr[0]');
+assert.sameValue(called, 2, 'called');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-iii-3.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-iii-3.js
new file mode 100644
index 0000000000..5899132312
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-iii-3.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: Array.prototype.filter - return value of callbackfn is null
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return null;
+}
+
+var obj = {
+  0: 11,
+  length: 1
+};
+
+var newArr = Array.prototype.filter.call(obj, callbackfn);
+
+assert.sameValue(newArr.length, 0, 'newArr.length');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-iii-30.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-iii-30.js
new file mode 100644
index 0000000000..ba0497c761
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-iii-30.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: >
+    Array.prototype.filter - return value (new Boolean(false)) of
+    callbackfn is treated as true value
+---*/
+
+function callbackfn(val, idx, obj) {
+  return new Boolean(false);
+}
+
+var newArr = [11].filter(callbackfn);
+
+assert.sameValue(newArr.length, 1, 'newArr.length');
+assert.sameValue(newArr[0], 11, 'newArr[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-iii-4.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-iii-4.js
new file mode 100644
index 0000000000..eaf48e0554
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-iii-4.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: >
+    Array.prototype.filter - return value of callbackfn is a boolean
+    (value is false)
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return false;
+}
+
+var obj = {
+  0: 11,
+  length: 1
+};
+
+var newArr = Array.prototype.filter.call(obj, callbackfn);
+
+assert.sameValue(newArr.length, 0, 'newArr.length');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-iii-5.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-iii-5.js
new file mode 100644
index 0000000000..e80422ec13
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-iii-5.js
@@ -0,0 +1,25 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: >
+    Array.prototype.filter - return value of callbackfn is a boolean
+    (value is true)
+---*/
+
+function callbackfn(val, idx, obj) {
+  return true;
+}
+
+var obj = {
+  0: 11,
+  length: 1
+};
+
+var newArr = Array.prototype.filter.call(obj, callbackfn);
+
+assert.sameValue(newArr.length, 1, 'newArr.length');
+assert.sameValue(newArr[0], 11, 'newArr[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-iii-6.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-iii-6.js
new file mode 100644
index 0000000000..47e984643e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-iii-6.js
@@ -0,0 +1,23 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: >
+    Array.prototype.filter - return value of callbackfn is a number
+    (value is 0)
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return 0;
+}
+
+var newArr = [11].filter(callbackfn);
+
+assert.sameValue(newArr.length, 0, 'newArr.length');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-iii-7.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-iii-7.js
new file mode 100644
index 0000000000..c5d81dc4e9
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-iii-7.js
@@ -0,0 +1,23 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: >
+    Array.prototype.filter - return value of callbackfn is a number
+    (value is +0)
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return +0;
+}
+
+var newArr = [11].filter(callbackfn);
+
+assert.sameValue(newArr.length, 0, 'newArr.length');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-iii-8.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-iii-8.js
new file mode 100644
index 0000000000..603f47378f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-iii-8.js
@@ -0,0 +1,23 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: >
+    Array.prototype.filter - return value of callbackfn is a nunmber
+    (value is -0)
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return -0;
+}
+
+var newArr = [11].filter(callbackfn);
+
+assert.sameValue(newArr.length, 0, 'newArr.length');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-iii-9.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-iii-9.js
new file mode 100644
index 0000000000..759f76f46b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-c-iii-9.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: >
+    Array.prototype.filter - return value of callbackfn is a number
+    (value is positive number)
+---*/
+
+function callbackfn(val, idx, obj) {
+  return 5;
+}
+
+var newArr = [11].filter(callbackfn);
+
+assert.sameValue(newArr.length, 1, 'newArr.length');
+assert.sameValue(newArr[0], 11, 'newArr[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/browser.js b/js/src/tests/test262/built-ins/Array/prototype/filter/browser.js
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/call-with-boolean.js b/js/src/tests/test262/built-ins/Array/prototype/filter/call-with-boolean.js
new file mode 100644
index 0000000000..cc9590aa33
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/call-with-boolean.js
@@ -0,0 +1,21 @@
+// Copyright (c) 2020 Rick Waldron.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: Array.prototype.filter applied to boolean primitive
+includes: [compareArray.js]
+---*/
+
+assert.compareArray(
+  Array.prototype.filter.call(true, () => {}),
+  [],
+  'Array.prototype.filter.call(true, () => {}) must return []'
+);
+assert.compareArray(
+  Array.prototype.filter.call(false, () => {}),
+  [],
+  'Array.prototype.filter.call(false, () => {}) must return []'
+);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/callbackfn-resize-arraybuffer.js b/js/src/tests/test262/built-ins/Array/prototype/filter/callbackfn-resize-arraybuffer.js
new file mode 100644
index 0000000000..ef7612695d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/callbackfn-resize-arraybuffer.js
@@ -0,0 +1,74 @@
+// |reftest| shell-option(--enable-arraybuffer-resizable) skip-if(!ArrayBuffer.prototype.resize||!xulRuntime.shell) -- resizable-arraybuffer is not enabled unconditionally, requires shell-options
+// Copyright (C) 2021 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.filter
+description: TypedArray instance buffer can be resized during iteration
+includes: [testTypedArray.js, compareArray.js]
+features: [TypedArray, resizable-arraybuffer]
+---*/
+
+// If the host chooses to throw as allowed by the specification, the observed
+// behavior will be identical to the case where `ArrayBuffer.prototype.resize`
+// has not been implemented. The following assertion prevents this test from
+// passing in runtimes which have not implemented the method.
+assert.sameValue(typeof ArrayBuffer.prototype.resize, 'function');
+
+testWithTypedArrayConstructors(function(TA) {
+  var BPE = TA.BYTES_PER_ELEMENT;
+  var buffer = new ArrayBuffer(BPE * 3, {maxByteLength: BPE * 4});
+  var sample = new TA(buffer);
+  var expectedElements, expectedIndices, expectedArrays;
+  var elements, indices, arrays, result;
+
+  elements = [];
+  indices = [];
+  arrays = [];
+  result = Array.prototype.filter.call(sample, function(element, index, array) {
+    if (elements.length === 0) {
+      try {
+        buffer.resize(2 * BPE);
+        expectedElements = [0, 0];
+        expectedIndices = [0, 1];
+        expectedArrays = [sample, sample];
+      } catch (_) {
+        expectedElements = [0, 0, 0];
+        expectedIndices = [0, 1, 2];
+        expectedArrays = [sample, sample, sample];
+      }
+    }
+
+    elements.push(element);
+    indices.push(index);
+    arrays.push(array);
+    return true;
+  });
+
+  assert.compareArray(elements, expectedElements, 'elements (shrink)');
+  assert.compareArray(indices, expectedIndices, 'indices (shrink)');
+  assert.compareArray(arrays, expectedArrays, 'arrays (shrink)');
+  assert.compareArray(result, expectedElements, 'result (shrink)');
+
+  elements = [];
+  indices = [];
+  arrays = [];
+  result = Array.prototype.filter.call(sample, function(element, index, array) {
+    if (elements.length === 0) {
+      try {
+        buffer.resize(4 * BPE);
+      } catch (_) {}
+    }
+
+    elements.push(element);
+    indices.push(index);
+    arrays.push(array);
+    return true;
+  });
+
+  assert.compareArray(elements, expectedElements, 'elements (grow)');
+  assert.compareArray(indices, expectedIndices, 'indices (grow)');
+  assert.compareArray(arrays, expectedArrays, 'arrays (grow)');
+  assert.compareArray(result, expectedElements, 'result (grow)');
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/create-ctor-non-object.js b/js/src/tests/test262/built-ins/Array/prototype/filter/create-ctor-non-object.js
new file mode 100644
index 0000000000..afab7f214f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/create-ctor-non-object.js
@@ -0,0 +1,53 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.filter
+description: >
+    Behavior when `constructor` property is neither an Object nor undefined
+info: |
+    [...]
+    5. Let A be ? ArraySpeciesCreate(O, 0).
+    [...]
+
+    9.4.2.3 ArraySpeciesCreate
+
+    [...]
+    5. Let C be ? Get(originalArray, "constructor").
+    [...]
+    9. If IsConstructor(C) is false, throw a TypeError exception.
+---*/
+
+var a = [];
+var callCount = 0;
+var cb = function() {
+  callCount += 0;
+};
+
+a.constructor = null;
+assert.throws(TypeError, function() {
+  a.filter(cb);
+}, 'null value');
+assert.sameValue(callCount, 0, 'callback not invoked (null value)');
+
+a = [];
+a.constructor = 1;
+assert.throws(TypeError, function() {
+  a.filter(cb);
+}, 'number value');
+assert.sameValue(callCount, 0, 'callback not invoked (number value)');
+
+a = [];
+a.constructor = 'string';
+assert.throws(TypeError, function() {
+  a.filter(cb);
+}, 'string value');
+assert.sameValue(callCount, 0, 'callback not invoked (string value)');
+
+a = [];
+a.constructor = true;
+assert.throws(TypeError, function() {
+  a.filter(cb);
+}, 'boolean value');
+assert.sameValue(callCount, 0, 'callback not invoked (boolean value)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/create-ctor-poisoned.js b/js/src/tests/test262/built-ins/Array/prototype/filter/create-ctor-poisoned.js
new file mode 100644
index 0000000000..77290e1cdd
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/create-ctor-poisoned.js
@@ -0,0 +1,34 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.filter
+description: Abrupt completion from `constructor` property access
+info: |
+    [...]
+    5. Let A be ? ArraySpeciesCreate(O, 0).
+    [...]
+
+    9.4.2.3 ArraySpeciesCreate
+
+    [...]
+    5. Let C be ? Get(originalArray, "constructor").
+---*/
+
+var a = [];
+var callCount = 0;
+var cb = function() {
+  callCount += 1;
+};
+
+Object.defineProperty(a, 'constructor', {
+  get: function() {
+    throw new Test262Error();
+  }
+});
+
+assert.throws(Test262Error, function() {
+  a.filter(cb);
+});
+assert.sameValue(callCount, 0);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/create-non-array.js b/js/src/tests/test262/built-ins/Array/prototype/filter/create-non-array.js
new file mode 100644
index 0000000000..1c95704270
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/create-non-array.js
@@ -0,0 +1,36 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.filter
+description: Constructor is ignored for non-Array values
+info: |
+    [...]
+    5. Let A be ? ArraySpeciesCreate(O, 0).
+    [...]
+
+    9.4.2.3 ArraySpeciesCreate
+
+    [...]
+    3. Let isArray be ? IsArray(originalArray).
+    4. If isArray is false, return ? ArrayCreate(length).
+---*/
+
+var obj = {
+  length: 0
+};
+var callCount = 0;
+var result;
+Object.defineProperty(obj, 'constructor', {
+  get: function() {
+    callCount += 1;
+  }
+});
+
+result = Array.prototype.filter.call(obj, function() {});
+
+assert.sameValue(callCount, 0, '`constructor` property not accessed');
+assert.sameValue(Object.getPrototypeOf(result), Array.prototype);
+assert(Array.isArray(result), 'result is an Array exotic object');
+assert.sameValue(result.length, 0, 'array created with appropriate length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/create-proto-from-ctor-realm-array.js b/js/src/tests/test262/built-ins/Array/prototype/filter/create-proto-from-ctor-realm-array.js
new file mode 100644
index 0000000000..fe8d6ce281
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/create-proto-from-ctor-realm-array.js
@@ -0,0 +1,45 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.filter
+description: Prefer Array constructor of current realm record
+info: |
+    1. Let O be ? ToObject(this value).
+    [...]
+    5. Let A be ? ArraySpeciesCreate(O, 0).
+    [...]
+
+    9.4.2.3 ArraySpeciesCreate
+
+    [...]
+    5. Let C be ? Get(originalArray, "constructor").
+    6. If IsConstructor(C) is true, then
+       a. Let thisRealm be the current Realm Record.
+       b. Let realmC be ? GetFunctionRealm(C).
+       c. If thisRealm and realmC are not the same Realm Record, then
+          i. If SameValue(C, realmC.[[Intrinsics]].[[%Array%]]) is true, let C
+             be undefined.
+    [...]
+features: [cross-realm, Symbol.species]
+---*/
+
+var array = [];
+var callCount = 0;
+var OArray = $262.createRealm().global.Array;
+var speciesDesc = {
+  get: function() {
+    callCount += 1;
+  }
+};
+var result;
+array.constructor = OArray;
+
+Object.defineProperty(Array, Symbol.species, speciesDesc);
+Object.defineProperty(OArray, Symbol.species, speciesDesc);
+
+result = array.filter(function() {});
+
+assert.sameValue(Object.getPrototypeOf(result), Array.prototype);
+assert.sameValue(callCount, 0, 'Species constructor is not referenced');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/create-proto-from-ctor-realm-non-array.js b/js/src/tests/test262/built-ins/Array/prototype/filter/create-proto-from-ctor-realm-non-array.js
new file mode 100644
index 0000000000..9909bf2d2f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/create-proto-from-ctor-realm-non-array.js
@@ -0,0 +1,46 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.filter
+description: Accept non-Array constructors from other realms
+info: |
+    1. Let O be ? ToObject(this value).
+    [...]
+    5. Let A be ? ArraySpeciesCreate(O, 0).
+    [...]
+
+    9.4.2.3 ArraySpeciesCreate
+
+    [...]
+    5. Let C be ? Get(originalArray, "constructor").
+    6. If IsConstructor(C) is true, then
+       a. Let thisRealm be the current Realm Record.
+       b. Let realmC be ? GetFunctionRealm(C).
+       c. If thisRealm and realmC are not the same Realm Record, then
+          i. If SameValue(C, realmC.[[Intrinsics]].[[%Array%]]) is true, let C
+             be undefined.
+    [...]
+features: [cross-realm, Symbol.species]
+---*/
+
+var array = [];
+var callCount = 0;
+var CustomCtor = function() {};
+var OObject = $262.createRealm().global.Object;
+var speciesDesc = {
+  get: function() {
+    callCount += 1;
+  }
+};
+var result;
+array.constructor = OObject;
+OObject[Symbol.species] = CustomCtor;
+
+Object.defineProperty(Array, Symbol.species, speciesDesc);
+
+result = array.filter(function() {});
+
+assert.sameValue(Object.getPrototypeOf(result), CustomCtor.prototype);
+assert.sameValue(callCount, 0, 'Array species constructor is not referenced');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/create-proxy.js b/js/src/tests/test262/built-ins/Array/prototype/filter/create-proxy.js
new file mode 100644
index 0000000000..53fdf04bc0
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/create-proxy.js
@@ -0,0 +1,41 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.filter
+description: Species constructor of a Proxy object whose target is an array
+info: |
+    [...]
+    5. Let A be ? ArraySpeciesCreate(O, 0).
+    [...]
+    9. Return A.
+
+    9.4.2.3 ArraySpeciesCreate
+
+    [...]
+    3. Let isArray be ? IsArray(originalArray).
+
+    7.2.2 IsArray
+
+    [...]
+    3. If argument is a Proxy exotic object, then
+       a. If the value of the [[ProxyHandler]] internal slot of argument is
+          null, throw a TypeError exception.
+       b. Let target be the value of the [[ProxyTarget]] internal slot of
+          argument.
+       c. Return ? IsArray(target).
+features: [Proxy, Symbol.species]
+---*/
+
+var array = [];
+var proxy = new Proxy(new Proxy(array, {}), {});
+var Ctor = function() {};
+var result;
+
+array.constructor = function() {};
+array.constructor[Symbol.species] = Ctor;
+
+result = Array.prototype.filter.call(proxy, function() {});
+
+assert.sameValue(Object.getPrototypeOf(result), Ctor.prototype);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/create-revoked-proxy.js b/js/src/tests/test262/built-ins/Array/prototype/filter/create-revoked-proxy.js
new file mode 100644
index 0000000000..e49abe2f44
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/create-revoked-proxy.js
@@ -0,0 +1,46 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.filter
+description: Abrupt completion from constructor that is a revoked Proxy object
+info: |
+    [...]
+    5. Let A be ? ArraySpeciesCreate(O, 0).
+    [...]
+
+    9.4.2.3 ArraySpeciesCreate
+
+    [...]
+    3. Let isArray be ? IsArray(originalArray).
+
+    7.2.2 IsArray
+
+    [...]
+    3. If argument is a Proxy exotic object, then
+       a. If the value of the [[ProxyHandler]] internal slot of argument is
+          null, throw a TypeError exception.
+features: [Proxy]
+---*/
+
+var o = Proxy.revocable([], {});
+var ctorCount = 0;
+var cbCount = 0;
+var cb = function() {
+  cbCount += 1;
+};
+
+Object.defineProperty(o.proxy, 'constructor', {
+  get: function() {
+    ctorCount += 1;
+  }
+});
+o.revoke();
+
+assert.throws(TypeError, function() {
+  Array.prototype.filter.call(o.proxy, cb);
+});
+
+assert.sameValue(ctorCount, 0, '`constructor` property not accessed');
+assert.sameValue(cbCount, 0, 'callback not invoked');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/create-species-abrupt.js b/js/src/tests/test262/built-ins/Array/prototype/filter/create-species-abrupt.js
new file mode 100644
index 0000000000..1380003108
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/create-species-abrupt.js
@@ -0,0 +1,40 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.filter
+description: Species constructor returns an abrupt completion
+info: |
+    [...]
+    5. Let A be ? ArraySpeciesCreate(O, 0).
+    [...]
+
+    9.4.2.3 ArraySpeciesCreate
+
+    [...]
+    5. Let C be ? Get(originalArray, "constructor").
+    [...]
+    7. If Type(C) is Object, then
+       a. Let C be ? Get(C, @@species).
+       b. If C is null, let C be undefined.
+    [...]
+    10. Return ? Construct(C, « length »).
+features: [Symbol.species]
+---*/
+
+var Ctor = function() {
+  throw new Test262Error();
+};
+var callCount = 0;
+var cb = function() {
+  callCount += 1;
+};
+var a = [];
+a.constructor = {};
+a.constructor[Symbol.species] = Ctor;
+
+assert.throws(Test262Error, function() {
+  a.filter(cb);
+});
+assert.sameValue(callCount, 0);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/create-species-non-ctor.js b/js/src/tests/test262/built-ins/Array/prototype/filter/create-species-non-ctor.js
new file mode 100644
index 0000000000..fff049a2c6
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/create-species-non-ctor.js
@@ -0,0 +1,46 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.filter
+description: >
+    Behavior when the @@species attribute is a non-constructor object
+info: |
+    [...]
+    5. Let A be ? ArraySpeciesCreate(O, 0).
+    [...]
+
+    9.4.2.3 ArraySpeciesCreate
+
+    [...]
+    5. Let C be ? Get(originalArray, "constructor").
+    [...]
+    7. If Type(C) is Object, then
+       a. Let C be ? Get(C, @@species).
+       b. If C is null, let C be undefined.
+    [...]
+    9. If IsConstructor(C) is false, throw a TypeError exception.
+includes: [isConstructor.js]
+features: [Symbol.species, Reflect.construct]
+---*/
+
+assert.sameValue(
+  isConstructor(parseInt),
+  false,
+  'precondition: isConstructor(parseInt) must return false'
+);
+
+var a = [];
+var callCount = 0;
+var cb = function() {
+  callCount += 1;
+};
+
+a.constructor = {};
+a.constructor[Symbol.species] = parseInt;
+
+assert.throws(TypeError, function() {
+  a.filter(cb);
+}, 'a.filter(cb) throws a TypeError exception');
+assert.sameValue(callCount, 0);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/create-species-null.js b/js/src/tests/test262/built-ins/Array/prototype/filter/create-species-null.js
new file mode 100644
index 0000000000..a1cf95abff
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/create-species-null.js
@@ -0,0 +1,35 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.filter
+description: >
+    A null value for the @@species constructor is interpreted as `undefined`
+info: |
+    [...]
+    5. Let A be ? ArraySpeciesCreate(O, 0).
+    [...]
+
+    9.4.2.3 ArraySpeciesCreate
+
+    [...]
+    5. Let C be ? Get(originalArray, "constructor").
+    [...]
+    7. If Type(C) is Object, then
+       a. Let C be ? Get(C, @@species).
+       b. If C is null, let C be undefined.
+    8. If C is undefined, return ? ArrayCreate(length).
+features: [Symbol.species]
+---*/
+
+var a = [];
+var result;
+
+a.constructor = {};
+a.constructor[Symbol.species] = null;
+
+result = a.filter(function() {});
+
+assert.sameValue(Object.getPrototypeOf(result), Array.prototype);
+assert(Array.isArray(result), 'result is an Array exotic object');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/create-species-poisoned.js b/js/src/tests/test262/built-ins/Array/prototype/filter/create-species-poisoned.js
new file mode 100644
index 0000000000..dbab47d6ae
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/create-species-poisoned.js
@@ -0,0 +1,39 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.filter
+description: Abrupt completion from `@@species` property access
+info: |
+    [...]
+    5. Let A be ? ArraySpeciesCreate(O, 0).
+    [...]
+
+    9.4.2.3 ArraySpeciesCreate
+
+    [...]
+    5. Let C be ? Get(originalArray, "constructor").
+    [...]
+    7. If Type(C) is Object, then
+       a. Let C be ? Get(C, @@species).
+features: [Symbol.species]
+---*/
+
+var a = [];
+var callCount = 0;
+var cb = function() {
+  callCount += 1;
+};
+a.constructor = {};
+
+Object.defineProperty(a.constructor, Symbol.species, {
+  get: function() {
+    throw new Test262Error();
+  }
+});
+
+assert.throws(Test262Error, function() {
+  a.filter(cb);
+});
+assert.sameValue(callCount, 0);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/create-species-undef.js b/js/src/tests/test262/built-ins/Array/prototype/filter/create-species-undef.js
new file mode 100644
index 0000000000..ec36822363
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/create-species-undef.js
@@ -0,0 +1,36 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.filter
+description: >
+    An undefined value for the @@species constructor triggers the creation  of
+    an Array exotic object
+info: |
+    [...]
+    5. Let A be ? ArraySpeciesCreate(O, 0).
+    [...]
+
+    9.4.2.3 ArraySpeciesCreate
+
+    [...]
+    5. Let C be ? Get(originalArray, "constructor").
+    [...]
+    7. If Type(C) is Object, then
+       a. Let C be ? Get(C, @@species).
+       b. If C is null, let C be undefined.
+    8. If C is undefined, return ? ArrayCreate(length).
+features: [Symbol.species]
+---*/
+
+var a = [];
+var result;
+
+a.constructor = {};
+a.constructor[Symbol.species] = undefined;
+
+result = a.filter(function() {});
+
+assert.sameValue(Object.getPrototypeOf(result), Array.prototype);
+assert(Array.isArray(result), 'result is an Array exotic object');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/create-species.js b/js/src/tests/test262/built-ins/Array/prototype/filter/create-species.js
new file mode 100644
index 0000000000..82eadd41e9
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/create-species.js
@@ -0,0 +1,45 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.filter
+description: Species constructor is used to create a new instance
+info: |
+    [...]
+    5. Let A be ? ArraySpeciesCreate(O, 0).
+    [...]
+
+    9.4.2.3 ArraySpeciesCreate
+
+    [...]
+    5. Let C be ? Get(originalArray, "constructor").
+    [...]
+    7. If Type(C) is Object, then
+       a. Let C be ? Get(C, @@species).
+       b. If C is null, let C be undefined.
+    [...]
+    10. Return ? Construct(C, « length »).
+features: [Symbol.species]
+---*/
+
+var thisValue, args, result;
+var callCount = 0;
+var instance = [];
+var Ctor = function() {
+  callCount += 1;
+  thisValue = this;
+  args = arguments;
+  return instance;
+};
+var a = [1, 2, 3, 4, 5, 6, 7];
+a.constructor = {};
+a.constructor[Symbol.species] = Ctor;
+
+result = a.filter(function() {});
+
+assert.sameValue(callCount, 1, 'Constructor invoked exactly once');
+assert.sameValue(Object.getPrototypeOf(thisValue), Ctor.prototype);
+assert.sameValue(args.length, 1, 'Constructor invoked with a single argument');
+assert.sameValue(args[0], 0);
+assert.sameValue(result, instance);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/length.js b/js/src/tests/test262/built-ins/Array/prototype/filter/length.js
new file mode 100644
index 0000000000..06c9cf9762
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/length.js
@@ -0,0 +1,32 @@
+// Copyright (C) 2017 Leo Balter. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: >
+  The "length" property of Array.prototype.filter
+info: |
+  22.1.3.7 Array.prototype.filter ( callbackfn [ , thisArg ] )
+
+  17 ECMAScript Standard Built-in Objects
+
+  Every built-in function object, including constructors, has a length property
+  whose value is an integer. Unless otherwise specified, this value is equal to
+  the largest number of named arguments shown in the subclause headings for the
+  function description. Optional parameters (which are indicated with brackets:
+  [ ]) or rest parameters (which are shown using the form «...name») are not
+  included in the default argument count.
+
+  Unless otherwise specified, the length property of a built-in function object
+  has the attributes { [[Writable]]: false, [[Enumerable]]: false,
+    [[Configurable]]: true }.
+includes: [propertyHelper.js]
+---*/
+
+assert.sameValue(Array.prototype.filter.length, 1);
+
+verifyNotEnumerable(Array.prototype.filter, 'length');
+verifyNotWritable(Array.prototype.filter, 'length');
+verifyConfigurable(Array.prototype.filter, 'length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/name.js b/js/src/tests/test262/built-ins/Array/prototype/filter/name.js
new file mode 100644
index 0000000000..4fbfcefd92
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/name.js
@@ -0,0 +1,28 @@
+// Copyright (C) 2015 André Bargull. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: >
+  Array.prototype.filter.name is "filter".
+info: |
+  Array.prototype.filter ( callbackfn [ , thisArg ] )
+
+  17 ECMAScript Standard Built-in Objects:
+    Every built-in Function object, including constructors, that is not
+    identified as an anonymous function has a name property whose value
+    is a String.
+
+    Unless otherwise specified, the name property of a built-in Function
+    object, if it exists, has the attributes { [[Writable]]: false,
+    [[Enumerable]]: false, [[Configurable]]: true }.
+includes: [propertyHelper.js]
+---*/
+
+assert.sameValue(Array.prototype.filter.name, "filter");
+
+verifyNotEnumerable(Array.prototype.filter, "name");
+verifyNotWritable(Array.prototype.filter, "name");
+verifyConfigurable(Array.prototype.filter, "name");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/not-a-constructor.js b/js/src/tests/test262/built-ins/Array/prototype/filter/not-a-constructor.js
new file mode 100644
index 0000000000..f9b011ced5
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/not-a-constructor.js
@@ -0,0 +1,35 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Array.prototype.filter does not implement [[Construct]], is not new-able
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+
+  sec-evaluatenew
+
+  ...
+  7. If IsConstructor(constructor) is false, throw a TypeError exception.
+  ...
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Array.prototype.filter),
+  false,
+  'isConstructor(Array.prototype.filter) must return false'
+);
+
+assert.throws(TypeError, () => {
+  new Array.prototype.filter(() => {});
+}, '`new Array.prototype.filter(() => {})` throws TypeError');
+
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/prop-desc.js b/js/src/tests/test262/built-ins/Array/prototype/filter/prop-desc.js
new file mode 100644
index 0000000000..2f7d688805
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/prop-desc.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2017 Leo Balter. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: >
+  "filter" property of Array.prototype
+info: |
+  17 ECMAScript Standard Built-in Objects
+  
+  Every other data property described in clauses 18 through 26 and in Annex B.2
+  has the attributes { [[Writable]]: true, [[Enumerable]]: false,
+    [[Configurable]]: true } unless otherwise specified.
+includes: [propertyHelper.js]
+---*/
+
+assert.sameValue(typeof Array.prototype.filter, 'function', 'typeof');
+
+verifyNotEnumerable(Array.prototype, "filter");
+verifyWritable(Array.prototype, "filter");
+verifyConfigurable(Array.prototype, "filter");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/shell.js b/js/src/tests/test262/built-ins/Array/prototype/filter/shell.js
new file mode 100644
index 0000000000..05fecd6ef1
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/shell.js
@@ -0,0 +1,161 @@
+// GENERATED, DO NOT EDIT
+// file: testTypedArray.js
+// Copyright (C) 2015 André Bargull. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+description: |
+    Collection of functions used to assert the correctness of TypedArray objects.
+defines:
+  - floatArrayConstructors
+  - nonClampedIntArrayConstructors
+  - intArrayConstructors
+  - typedArrayConstructors
+  - TypedArray
+  - testWithTypedArrayConstructors
+  - nonAtomicsFriendlyTypedArrayConstructors
+  - testWithAtomicsFriendlyTypedArrayConstructors
+  - testWithNonAtomicsFriendlyTypedArrayConstructors
+  - testTypedArrayConversions
+---*/
+
+var floatArrayConstructors = [
+  Float64Array,
+  Float32Array
+];
+
+var nonClampedIntArrayConstructors = [
+  Int32Array,
+  Int16Array,
+  Int8Array,
+  Uint32Array,
+  Uint16Array,
+  Uint8Array
+];
+
+var intArrayConstructors = nonClampedIntArrayConstructors.concat([Uint8ClampedArray]);
+
+// Float16Array is a newer feature
+// adding it to this list unconditionally would cause implementations lacking it to fail every test which uses it
+if (typeof Float16Array !== 'undefined') {
+  floatArrayConstructors.push(Float16Array);
+}
+
+/**
+ * Array containing every non-bigint typed array constructor.
+ */
+
+var typedArrayConstructors = floatArrayConstructors.concat(intArrayConstructors);
+
+/**
+ * The %TypedArray% intrinsic constructor function.
+ */
+var TypedArray = Object.getPrototypeOf(Int8Array);
+
+/**
+ * Callback for testing a typed array constructor.
+ *
+ * @callback typedArrayConstructorCallback
+ * @param {Function} Constructor the constructor object to test with.
+ */
+
+/**
+ * Calls the provided function for every typed array constructor.
+ *
+ * @param {typedArrayConstructorCallback} f - the function to call for each typed array constructor.
+ * @param {Array} selected - An optional Array with filtered typed arrays
+ */
+function testWithTypedArrayConstructors(f, selected) {
+  var constructors = selected || typedArrayConstructors;
+  for (var i = 0; i < constructors.length; ++i) {
+    var constructor = constructors[i];
+    try {
+      f(constructor);
+    } catch (e) {
+      e.message += " (Testing with " + constructor.name + ".)";
+      throw e;
+    }
+  }
+}
+
+var nonAtomicsFriendlyTypedArrayConstructors = floatArrayConstructors.concat([Uint8ClampedArray]);
+/**
+ * Calls the provided function for every non-"Atomics Friendly" typed array constructor.
+ *
+ * @param {typedArrayConstructorCallback} f - the function to call for each typed array constructor.
+ * @param {Array} selected - An optional Array with filtered typed arrays
+ */
+function testWithNonAtomicsFriendlyTypedArrayConstructors(f) {
+  testWithTypedArrayConstructors(f, nonAtomicsFriendlyTypedArrayConstructors);
+}
+
+/**
+ * Calls the provided function for every "Atomics Friendly" typed array constructor.
+ *
+ * @param {typedArrayConstructorCallback} f - the function to call for each typed array constructor.
+ * @param {Array} selected - An optional Array with filtered typed arrays
+ */
+function testWithAtomicsFriendlyTypedArrayConstructors(f) {
+  testWithTypedArrayConstructors(f, [
+    Int32Array,
+    Int16Array,
+    Int8Array,
+    Uint32Array,
+    Uint16Array,
+    Uint8Array,
+  ]);
+}
+
+/**
+ * Helper for conversion operations on TypedArrays, the expected values
+ * properties are indexed in order to match the respective value for each
+ * TypedArray constructor
+ * @param  {Function} fn - the function to call for each constructor and value.
+ *                         will be called with the constructor, value, expected
+ *                         value, and a initial value that can be used to avoid
+ *                         a false positive with an equivalent expected value.
+ */
+function testTypedArrayConversions(byteConversionValues, fn) {
+  var values = byteConversionValues.values;
+  var expected = byteConversionValues.expected;
+
+  testWithTypedArrayConstructors(function(TA) {
+    var name = TA.name.slice(0, -5);
+
+    return values.forEach(function(value, index) {
+      var exp = expected[name][index];
+      var initial = 0;
+      if (exp === 0) {
+        initial = 1;
+      }
+      fn(TA, value, exp, initial);
+    });
+  });
+}
+
+/**
+ * Checks if the given argument is one of the float-based TypedArray constructors.
+ *
+ * @param {constructor} ctor - the value to check
+ * @returns {boolean}
+ */
+function isFloatTypedArrayConstructor(arg) {
+  return floatArrayConstructors.indexOf(arg) !== -1;
+}
+
+/**
+ * Determines the precision of the given float-based TypedArray constructor.
+ *
+ * @param {constructor} ctor - the value to check
+ * @returns {string} "half", "single", or "double" for Float16Array, Float32Array, and Float64Array respectively.
+ */
+function floatTypedArrayConstructorPrecision(FA) {
+  if (typeof Float16Array !== "undefined" && FA === Float16Array) {
+    return "half";
+  } else if (FA === Float32Array) {
+    return "single";
+  } else if (FA === Float64Array) {
+    return "double";
+  } else {
+    throw new Error("Malformed test - floatTypedArrayConstructorPrecision called with non-float TypedArray");
+  }
+}
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/target-array-non-extensible.js b/js/src/tests/test262/built-ins/Array/prototype/filter/target-array-non-extensible.js
new file mode 100644
index 0000000000..e7f4d9e56b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/target-array-non-extensible.js
@@ -0,0 +1,44 @@
+// Copyright (C) 2020 Alexey Shvayka. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: >
+  TypeError is thrown if CreateDataProperty fails.
+  (result object is non-extensible)
+info: |
+  Array.prototype.filter ( callbackfn [ , thisArg ] )
+
+  [...]
+  7. Repeat, while k < len
+    [...]
+    c. If kPresent is true, then
+      [...]
+      iii. If selected is true, then
+        1. Perform ? CreateDataPropertyOrThrow(A, ! ToString(to), kValue).
+    [...]
+
+  CreateDataPropertyOrThrow ( O, P, V )
+
+  [...]
+  3. Let success be ? CreateDataProperty(O, P, V).
+  4. If success is false, throw a TypeError exception.
+features: [Symbol.species]
+---*/
+
+var A = function(_length) {
+  this.length = 0;
+  Object.preventExtensions(this);
+};
+
+var arr = [1];
+arr.constructor = {};
+arr.constructor[Symbol.species] = A;
+
+assert.throws(TypeError, function() {
+  arr.filter(function() {
+    return true;
+  });
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/target-array-with-non-configurable-property.js b/js/src/tests/test262/built-ins/Array/prototype/filter/target-array-with-non-configurable-property.js
new file mode 100644
index 0000000000..2ee21a69ab
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/target-array-with-non-configurable-property.js
@@ -0,0 +1,46 @@
+// Copyright (C) 2020 Alexey Shvayka. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: >
+  TypeError is thrown if CreateDataProperty fails.
+  (result object's "0" is non-configurable)
+info: |
+  Array.prototype.filter ( callbackfn [ , thisArg ] )
+
+  [...]
+  7. Repeat, while k < len
+    [...]
+    c. If kPresent is true, then
+      [...]
+      iii. If selected is true, then
+        1. Perform ? CreateDataPropertyOrThrow(A, ! ToString(to), kValue).
+  [...]
+
+  CreateDataPropertyOrThrow ( O, P, V )
+
+  [...]
+  3. Let success be ? CreateDataProperty(O, P, V).
+  4. If success is false, throw a TypeError exception.
+features: [Symbol.species]
+---*/
+
+var A = function(_length) {
+  Object.defineProperty(this, "0", {
+    writable: true,
+    configurable: false,
+  });
+};
+
+var arr = [1];
+arr.constructor = {};
+arr.constructor[Symbol.species] = A;
+
+assert.throws(TypeError, function() {
+  arr.filter(function() {
+    return true;
+  });
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/target-array-with-non-writable-property.js b/js/src/tests/test262/built-ins/Array/prototype/filter/target-array-with-non-writable-property.js
new file mode 100644
index 0000000000..f158da2e74
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/target-array-with-non-writable-property.js
@@ -0,0 +1,39 @@
+// Copyright (C) 2018 André Bargull. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.filter
+description: >
+  Non-writable properties are overwritten by CreateDataPropertyOrThrow.
+info: |
+  22.1.3.7 Array.prototype.filter ( callbackfn [ , thisArg ] )
+
+  ...
+  8. Repeat, while k < len
+    ...
+    c. If kPresent is true, then
+      ...
+      iii. If selected is true, then
+        1. Perform ? CreateDataPropertyOrThrow(A, ! ToString(to), kValue).
+        ...
+features: [Symbol.species]
+includes: [propertyHelper.js]
+---*/
+
+var a = [1];
+a.constructor = {};
+a.constructor[Symbol.species] = function(len) {
+    var q = new Array(0);
+    Object.defineProperty(q, 0, {
+        value: 0, writable: false, configurable: true, enumerable: false,
+    });
+    return q;
+};
+
+var r = a.filter(function(){ return true; });
+
+verifyProperty(r, 0, {
+    value: 1, writable: true, configurable: true, enumerable: true,
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/find/array-altered-during-loop.js b/js/src/tests/test262/built-ins/Array/prototype/find/array-altered-during-loop.js
new file mode 100644
index 0000000000..4cedb36f08
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/find/array-altered-during-loop.js
@@ -0,0 +1,49 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.find
+description: >
+  The range of elements processed is set before the first call to `predicate`.
+info: |
+  22.1.3.8 Array.prototype.find ( predicate[ , thisArg ] )
+
+  ...
+  6. If thisArg was supplied, let T be thisArg; else let T be undefined.
+  7. Let k be 0.
+  8. Repeat, while k < len
+    ...
+    d. Let testResult be ToBoolean(Call(predicate, T, «kValue, k, O»)).
+  ...
+---*/
+
+var arr = ['Shoes', 'Car', 'Bike'];
+var results = [];
+
+arr.find(function(kValue) {
+  if (results.length === 0) {
+    arr.splice(1, 1);
+  }
+  results.push(kValue);
+});
+
+assert.sameValue(results.length, 3, 'predicate called three times');
+assert.sameValue(results[0], 'Shoes');
+assert.sameValue(results[1], 'Bike');
+assert.sameValue(results[2], undefined);
+
+results = [];
+arr = ['Skateboard', 'Barefoot'];
+arr.find(function(kValue) {
+  if (results.length === 0) {
+    arr.push('Motorcycle');
+    arr[1] = 'Magic Carpet';
+  }
+
+  results.push(kValue);
+});
+
+assert.sameValue(results.length, 2, 'predicate called twice');
+assert.sameValue(results[0], 'Skateboard');
+assert.sameValue(results[1], 'Magic Carpet');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/find/browser.js b/js/src/tests/test262/built-ins/Array/prototype/find/browser.js
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/js/src/tests/test262/built-ins/Array/prototype/find/call-with-boolean.js b/js/src/tests/test262/built-ins/Array/prototype/find/call-with-boolean.js
new file mode 100644
index 0000000000..4ac4e5fa42
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/find/call-with-boolean.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2020 Rick Waldron.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.find
+description: Array.prototype.find applied to boolean primitive
+---*/
+
+assert.sameValue(
+  Array.prototype.find.call(true, () => {}),
+  undefined,
+  'Array.prototype.find.call(true, () => {}) must return undefined'
+);
+assert.sameValue(
+  Array.prototype.find.call(false, () => {}),
+  undefined,
+  'Array.prototype.find.call(false, () => {}) must return undefined'
+);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/find/callbackfn-resize-arraybuffer.js b/js/src/tests/test262/built-ins/Array/prototype/find/callbackfn-resize-arraybuffer.js
new file mode 100644
index 0000000000..31a7b55750
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/find/callbackfn-resize-arraybuffer.js
@@ -0,0 +1,76 @@
+// |reftest| shell-option(--enable-arraybuffer-resizable) skip-if(!ArrayBuffer.prototype.resize||!xulRuntime.shell) -- resizable-arraybuffer is not enabled unconditionally, requires shell-options
+// Copyright (C) 2021 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.find
+description: TypedArray instance buffer can be resized during iteration
+includes: [testTypedArray.js, compareArray.js]
+features: [TypedArray, resizable-arraybuffer]
+---*/
+
+// If the host chooses to throw as allowed by the specification, the observed
+// behavior will be identical to the case where `ArrayBuffer.prototype.resize`
+// has not been implemented. The following assertion prevents this test from
+// passing in runtimes which have not implemented the method.
+assert.sameValue(typeof ArrayBuffer.prototype.resize, 'function');
+
+testWithTypedArrayConstructors(function(TA) {
+  var BPE = TA.BYTES_PER_ELEMENT;
+  var buffer = new ArrayBuffer(BPE * 3, {maxByteLength: BPE * 4});
+  var sample = new TA(buffer);
+  var finalElement, expectedElements, expectedIndices, expectedArrays;
+  var elements, indices, arrays, result;
+
+  elements = [];
+  indices = [];
+  arrays = [];
+  result = Array.prototype.find.call(sample, function(element, index, array) {
+    if (elements.length === 0) {
+      try {
+        buffer.resize(2 * BPE);
+        finalElement = undefined;
+        expectedElements = [0, 0];
+        expectedIndices = [0, 1];
+        expectedArrays = [sample, sample];
+      } catch (_) {
+        finalElement = 0;
+        expectedElements = [0, 0, 0];
+        expectedIndices = [0, 1, 2];
+        expectedArrays = [sample, sample, sample];
+      }
+    }
+
+    elements.push(element);
+    indices.push(index);
+    arrays.push(array);
+    return false;
+  });
+
+  assert.compareArray(elements, [0, 0, finalElement], 'elements (shrink)');
+  assert.compareArray(indices, [0, 1, 2], 'indices (shrink)');
+  assert.compareArray(arrays, [sample, sample, sample], 'arrays (shrink)');
+  assert.sameValue(result, undefined, 'result (shrink)');
+
+  elements = [];
+  indices = [];
+  arrays = [];
+  result = Array.prototype.find.call(sample, function(element, index, array) {
+    if (elements.length === 0) {
+      try {
+        buffer.resize(4 * BPE);
+      } catch (_) {}
+    }
+
+    elements.push(element);
+    indices.push(index);
+    arrays.push(array);
+    return false;
+  });
+
+  assert.compareArray(elements, expectedElements, 'elements (grow)');
+  assert.compareArray(indices, expectedIndices, 'indices (grow)');
+  assert.compareArray(arrays, expectedArrays, 'arrays (grow)');
+  assert.sameValue(result, undefined, 'result (grow)');
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/find/length.js b/js/src/tests/test262/built-ins/Array/prototype/find/length.js
new file mode 100644
index 0000000000..2522319483
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/find/length.js
@@ -0,0 +1,20 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.find
+description: Array.prototype.find.length value and descriptor.
+info: |
+  17 ECMAScript Standard Built-in Objects
+includes: [propertyHelper.js]
+---*/
+
+assert.sameValue(
+  Array.prototype.find.length, 1,
+  'The value of `Array.prototype.find.length` is `1`'
+);
+
+verifyNotEnumerable(Array.prototype.find, 'length');
+verifyNotWritable(Array.prototype.find, 'length');
+verifyConfigurable(Array.prototype.find, 'length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/find/name.js b/js/src/tests/test262/built-ins/Array/prototype/find/name.js
new file mode 100644
index 0000000000..8a4c21fe67
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/find/name.js
@@ -0,0 +1,24 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.find
+description: >
+  Array.prototype.find.name value and descriptor.
+info: |
+  22.1.3.8 Array.prototype.find ( predicate [ , thisArg ] )
+
+  17 ECMAScript Standard Built-in Objects
+
+includes: [propertyHelper.js]
+---*/
+
+assert.sameValue(
+  Array.prototype.find.name, 'find',
+  'The value of `Array.prototype.find.name` is `"find"`'
+);
+
+verifyNotEnumerable(Array.prototype.find, 'name');
+verifyNotWritable(Array.prototype.find, 'name');
+verifyConfigurable(Array.prototype.find, 'name');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/find/not-a-constructor.js b/js/src/tests/test262/built-ins/Array/prototype/find/not-a-constructor.js
new file mode 100644
index 0000000000..8e2d17caff
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/find/not-a-constructor.js
@@ -0,0 +1,31 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Array.prototype.find does not implement [[Construct]], is not new-able
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+
+  sec-evaluatenew
+
+  ...
+  7. If IsConstructor(constructor) is false, throw a TypeError exception.
+  ...
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(isConstructor(Array.prototype.find), false, 'isConstructor(Array.prototype.find) must return false');
+
+assert.throws(TypeError, () => {
+  new Array.prototype.find(() => {});
+}, '`new Array.prototype.find(() => {})` throws TypeError');
+
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/find/predicate-call-parameters.js b/js/src/tests/test262/built-ins/Array/prototype/find/predicate-call-parameters.js
new file mode 100644
index 0000000000..aa9483c656
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/find/predicate-call-parameters.js
@@ -0,0 +1,48 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.find
+description: >
+  Predicate called as F.call( thisArg, kValue, k, O ) for each array entry.
+info: |
+  22.1.3.8 Array.prototype.find ( predicate[ , thisArg ] )
+
+  ...
+  6. If thisArg was supplied, let T be thisArg; else let T be undefined.
+  7. Let k be 0.
+  8. Repeat, while k < len
+    ...
+    d. Let testResult be ToBoolean(Call(predicate, T, «kValue, k, O»)).
+    e. ReturnIfAbrupt(testResult).
+  ...
+---*/
+
+var arr = ['Mike', 'Rick', 'Leo'];
+
+var results = [];
+
+arr.find(function(kValue, k, O) {
+  results.push(arguments);
+});
+
+assert.sameValue(results.length, 3);
+
+var result = results[0];
+assert.sameValue(result[0], 'Mike');
+assert.sameValue(result[1], 0);
+assert.sameValue(result[2], arr);
+assert.sameValue(result.length, 3);
+
+result = results[1];
+assert.sameValue(result[0], 'Rick');
+assert.sameValue(result[1], 1);
+assert.sameValue(result[2], arr);
+assert.sameValue(result.length, 3);
+
+result = results[2];
+assert.sameValue(result[0], 'Leo');
+assert.sameValue(result[1], 2);
+assert.sameValue(result[2], arr);
+assert.sameValue(result.length, 3);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/find/predicate-call-this-non-strict.js b/js/src/tests/test262/built-ins/Array/prototype/find/predicate-call-this-non-strict.js
new file mode 100644
index 0000000000..b9b1827fb0
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/find/predicate-call-this-non-strict.js
@@ -0,0 +1,34 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.find
+description: >
+  Predicate thisArg as F.call( thisArg, kValue, k, O ) for each array entry.
+info: |
+  22.1.3.8 Array.prototype.find ( predicate[ , thisArg ] )
+
+  ...
+  8. Repeat, while k < len
+    ...
+    d. Let testResult be ToBoolean(Call(predicate, T, «kValue, k, O»)).
+    e. ReturnIfAbrupt(testResult).
+  ...
+flags: [noStrict]
+---*/
+
+var result;
+
+[1].find(function(kValue, k, O) {
+  result = this;
+});
+
+assert.sameValue(result, this);
+
+var o = {};
+[1].find(function() {
+  result = this;
+}, o);
+
+assert.sameValue(result, o);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/find/predicate-call-this-strict-strict.js b/js/src/tests/test262/built-ins/Array/prototype/find/predicate-call-this-strict-strict.js
new file mode 100644
index 0000000000..4ed3a65b04
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/find/predicate-call-this-strict-strict.js
@@ -0,0 +1,35 @@
+'use strict';
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.find
+description: >
+  Predicate thisArg as F.call( thisArg, kValue, k, O ) for each array entry.
+info: |
+  22.1.3.8 Array.prototype.find ( predicate[ , thisArg ] )
+
+  ...
+  8. Repeat, while k < len
+    ...
+    d. Let testResult be ToBoolean(Call(predicate, T, «kValue, k, O»)).
+    e. ReturnIfAbrupt(testResult).
+  ...
+flags: [onlyStrict]
+---*/
+
+var result;
+
+[1].find(function(kValue, k, O) {
+  result = this;
+});
+
+assert.sameValue(result, undefined);
+
+var o = {};
+[1].find(function() {
+  result = this;
+}, o);
+
+assert.sameValue(result, o);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/find/predicate-called-for-each-array-property.js b/js/src/tests/test262/built-ins/Array/prototype/find/predicate-called-for-each-array-property.js
new file mode 100644
index 0000000000..6e42134880
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/find/predicate-called-for-each-array-property.js
@@ -0,0 +1,28 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.find
+description: >
+  Predicate is called for each array property.
+info: |
+  22.1.3.8 Array.prototype.find ( predicate[ , thisArg ] )
+
+  ...
+  6. If thisArg was supplied, let T be thisArg; else let T be undefined.
+  7. Let k be 0.
+  8. Repeat, while k < len
+    ...
+    d. Let testResult be ToBoolean(Call(predicate, T, «kValue, k, O»)).
+  ...
+---*/
+
+var arr = [undefined, , , 'foo'];
+var called = 0;
+
+arr.find(function() {
+  called++;
+});
+
+assert.sameValue(called, 4);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/find/predicate-is-not-callable-throws.js b/js/src/tests/test262/built-ins/Array/prototype/find/predicate-is-not-callable-throws.js
new file mode 100644
index 0000000000..09266c14a7
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/find/predicate-is-not-callable-throws.js
@@ -0,0 +1,51 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.find
+description: >
+  Throws a TypeError exception if predicate is not callable.
+info: |
+  22.1.3.8 Array.prototype.find ( predicate[ , thisArg ] )
+
+  ...
+  5. If IsCallable(predicate) is false, throw a TypeError exception.
+  ...
+---*/
+
+assert.throws(TypeError, function() {
+  [].find({});
+});
+
+assert.throws(TypeError, function() {
+  [].find(null);
+});
+
+assert.throws(TypeError, function() {
+  [].find(undefined);
+});
+
+assert.throws(TypeError, function() {
+  [].find(true);
+});
+
+assert.throws(TypeError, function() {
+  [].find(1);
+});
+
+assert.throws(TypeError, function() {
+  [].find('');
+});
+
+assert.throws(TypeError, function() {
+  [].find(1);
+});
+
+assert.throws(TypeError, function() {
+  [].find([]);
+});
+
+assert.throws(TypeError, function() {
+  [].find(/./);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/find/predicate-not-called-on-empty-array.js b/js/src/tests/test262/built-ins/Array/prototype/find/predicate-not-called-on-empty-array.js
new file mode 100644
index 0000000000..115e03774a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/find/predicate-not-called-on-empty-array.js
@@ -0,0 +1,31 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.find
+description: >
+  Predicate is only called if this.length is > 0.
+info: |
+  22.1.3.8 Array.prototype.find ( predicate[ , thisArg ] )
+
+  ...
+  7. Let k be 0.
+  8. Repeat, while k < len
+    ...
+    d. Let testResult be ToBoolean(Call(predicate, T, «kValue, k, O»)).
+  ...
+  9. Return undefined.
+---*/
+
+var called = false;
+
+var predicate = function() {
+  called = true;
+  return true;
+};
+
+var result = [].find(predicate);
+
+assert.sameValue(called, false, '[].find(predicate) does not call predicate');
+assert.sameValue(result, undefined, '[].find(predicate) returned undefined');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/find/prop-desc.js b/js/src/tests/test262/built-ins/Array/prototype/find/prop-desc.js
new file mode 100644
index 0000000000..1e36c8a92f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/find/prop-desc.js
@@ -0,0 +1,21 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.find
+description: Property type and descriptor.
+info: |
+  17 ECMAScript Standard Built-in Objects
+includes: [propertyHelper.js]
+---*/
+
+assert.sameValue(
+  typeof Array.prototype.find,
+  'function',
+  '`typeof Array.prototype.find` is `function`'
+);
+
+verifyNotEnumerable(Array.prototype, 'find');
+verifyWritable(Array.prototype, 'find');
+verifyConfigurable(Array.prototype, 'find');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/find/return-abrupt-from-predicate-call.js b/js/src/tests/test262/built-ins/Array/prototype/find/return-abrupt-from-predicate-call.js
new file mode 100644
index 0000000000..d12cc87369
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/find/return-abrupt-from-predicate-call.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.find
+description: >
+  Return abrupt from predicate call.
+info: |
+  22.1.3.8 Array.prototype.find ( predicate[ , thisArg ] )
+
+  ...
+  7. Let k be 0.
+  8. Repeat, while k < len
+    ...
+    d. Let testResult be ToBoolean(Call(predicate, T, «kValue, k, O»)).
+    e. ReturnIfAbrupt(testResult).
+  ...
+---*/
+
+var predicate = function() {
+  throw new Test262Error();
+};
+
+assert.throws(Test262Error, function() {
+  [1].find(predicate);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/find/return-abrupt-from-property.js b/js/src/tests/test262/built-ins/Array/prototype/find/return-abrupt-from-property.js
new file mode 100644
index 0000000000..27d0bd6870
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/find/return-abrupt-from-property.js
@@ -0,0 +1,33 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.find
+description: >
+  Returns abrupt from getting property value from `this`.
+info: |
+  22.1.3.8 Array.prototype.find ( predicate[ , thisArg ] )
+
+  ...
+  7. Let k be 0.
+  8. Repeat, while k < len
+    a. Let Pk be ToString(k).
+    b. Let kValue be Get(O, Pk).
+    c. ReturnIfAbrupt(kValue).
+  ...
+---*/
+
+var o = {
+  length: 1
+};
+
+Object.defineProperty(o, 0, {
+  get: function() {
+    throw new Test262Error();
+  }
+});
+
+assert.throws(Test262Error, function() {
+  [].find.call(o, function() {});
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/find/return-abrupt-from-this-length-as-symbol.js b/js/src/tests/test262/built-ins/Array/prototype/find/return-abrupt-from-this-length-as-symbol.js
new file mode 100644
index 0000000000..25fc55d79f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/find/return-abrupt-from-this-length-as-symbol.js
@@ -0,0 +1,26 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.find
+description: >
+  Return abrupt from ToLength(Get(O, "length")) where length is a Symbol.
+info: |
+  22.1.3.8 Array.prototype.find ( predicate[ , thisArg ] )
+
+  1. Let O be ToObject(this value).
+  2. ReturnIfAbrupt(O).
+  3. Let len be ToLength(Get(O, "length")).
+  4. ReturnIfAbrupt(len).
+features: [Symbol]
+---*/
+
+var o = {};
+
+o.length = Symbol(1);
+
+// predicate fn is given to avoid false positives
+assert.throws(TypeError, function() {
+  [].find.call(o, function() {});
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/find/return-abrupt-from-this-length.js b/js/src/tests/test262/built-ins/Array/prototype/find/return-abrupt-from-this-length.js
new file mode 100644
index 0000000000..0063384230
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/find/return-abrupt-from-this-length.js
@@ -0,0 +1,40 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.find
+description: >
+  Return abrupt from ToLength(Get(O, "length")).
+info: |
+  22.1.3.8 Array.prototype.find ( predicate[ , thisArg ] )
+
+  1. Let O be ToObject(this value).
+  2. ReturnIfAbrupt(O).
+  3. Let len be ToLength(Get(O, "length")).
+  4. ReturnIfAbrupt(len).
+---*/
+
+var o1 = {};
+
+Object.defineProperty(o1, 'length', {
+  get: function() {
+    throw new Test262Error();
+  },
+  configurable: true
+});
+
+assert.throws(Test262Error, function() {
+  [].find.call(o1);
+});
+
+var o2 = {
+  length: {
+    valueOf: function() {
+      throw new Test262Error();
+    }
+  }
+};
+assert.throws(Test262Error, function() {
+  [].find.call(o2);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/find/return-abrupt-from-this.js b/js/src/tests/test262/built-ins/Array/prototype/find/return-abrupt-from-this.js
new file mode 100644
index 0000000000..4be965cd8f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/find/return-abrupt-from-this.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.find
+description: >
+  Return abrupt from ToObject(this value).
+info: |
+  22.1.3.8 Array.prototype.find ( predicate[ , thisArg ] )
+
+  1. Let O be ToObject(this value).
+  2. ReturnIfAbrupt(O).
+---*/
+
+// predicate fn is given to avoid false positives
+assert.throws(TypeError, function() {
+  Array.prototype.find.call(undefined, function() {});
+});
+
+assert.throws(TypeError, function() {
+  Array.prototype.find.call(null, function() {});
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/find/return-found-value-predicate-result-is-true.js b/js/src/tests/test262/built-ins/Array/prototype/find/return-found-value-predicate-result-is-true.js
new file mode 100644
index 0000000000..bde5b7c13c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/find/return-found-value-predicate-result-is-true.js
@@ -0,0 +1,65 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.find
+description: >
+  Return found value if predicate return a boolean true value.
+info: |
+  22.1.3.8 Array.prototype.find ( predicate[ , thisArg ] )
+
+  ...
+  8. Repeat, while k < len
+    ...
+    d. Let testResult be ToBoolean(Call(predicate, T, «kValue, k, O»)).
+    e. ReturnIfAbrupt(testResult).
+    f. If testResult is true, return kValue.
+  ...
+features: [Symbol]
+---*/
+
+var arr = ['Shoes', 'Car', 'Bike'];
+var called = 0;
+
+var result = arr.find(function(val) {
+  called++;
+  return true;
+});
+
+assert.sameValue(result, 'Shoes');
+assert.sameValue(called, 1, 'predicate was called once');
+
+called = 0;
+result = arr.find(function(val) {
+  called++;
+  return val === 'Bike';
+});
+
+assert.sameValue(called, 3, 'predicate was called three times');
+assert.sameValue(result, 'Bike');
+
+result = arr.find(function(val) {
+  return 'string';
+});
+assert.sameValue(result, 'Shoes', 'coerced string');
+
+result = arr.find(function(val) {
+  return {};
+});
+assert.sameValue(result, 'Shoes', 'coerced object');
+
+result = arr.find(function(val) {
+  return Symbol('');
+});
+assert.sameValue(result, 'Shoes', 'coerced Symbol');
+
+result = arr.find(function(val) {
+  return 1;
+});
+assert.sameValue(result, 'Shoes', 'coerced number');
+
+result = arr.find(function(val) {
+  return -1;
+});
+assert.sameValue(result, 'Shoes', 'coerced negative number');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/find/return-undefined-if-predicate-returns-false-value.js b/js/src/tests/test262/built-ins/Array/prototype/find/return-undefined-if-predicate-returns-false-value.js
new file mode 100644
index 0000000000..51a8d9aa20
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/find/return-undefined-if-predicate-returns-false-value.js
@@ -0,0 +1,55 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.find
+description: >
+  Return undefined if predicate always returns a boolean false value.
+info: |
+  22.1.3.8 Array.prototype.find ( predicate[ , thisArg ] )
+
+  ...
+  8. Repeat, while k < len
+    ...
+    d. Let testResult be ToBoolean(Call(predicate, T, «kValue, k, O»)).
+    ...
+  9. Return undefined.
+features: [Symbol]
+---*/
+
+var arr = ['Shoes', 'Car', 'Bike'];
+var called = 0;
+
+var result = arr.find(function(val) {
+  called++;
+  return false;
+});
+
+assert.sameValue(called, 3, 'predicate was called three times');
+assert.sameValue(result, undefined);
+
+result = arr.find(function(val) {
+  return '';
+});
+assert.sameValue(result, undefined, 'coerced string');
+
+result = arr.find(function(val) {
+  return undefined;
+});
+assert.sameValue(result, undefined, 'coerced undefined');
+
+result = arr.find(function(val) {
+  return null;
+});
+assert.sameValue(result, undefined, 'coerced null');
+
+result = arr.find(function(val) {
+  return 0;
+});
+assert.sameValue(result, undefined, 'coerced 0');
+
+result = arr.find(function(val) {
+  return NaN;
+});
+assert.sameValue(result, undefined, 'coerced NaN');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/find/shell.js b/js/src/tests/test262/built-ins/Array/prototype/find/shell.js
new file mode 100644
index 0000000000..05fecd6ef1
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/find/shell.js
@@ -0,0 +1,161 @@
+// GENERATED, DO NOT EDIT
+// file: testTypedArray.js
+// Copyright (C) 2015 André Bargull. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+description: |
+    Collection of functions used to assert the correctness of TypedArray objects.
+defines:
+  - floatArrayConstructors
+  - nonClampedIntArrayConstructors
+  - intArrayConstructors
+  - typedArrayConstructors
+  - TypedArray
+  - testWithTypedArrayConstructors
+  - nonAtomicsFriendlyTypedArrayConstructors
+  - testWithAtomicsFriendlyTypedArrayConstructors
+  - testWithNonAtomicsFriendlyTypedArrayConstructors
+  - testTypedArrayConversions
+---*/
+
+var floatArrayConstructors = [
+  Float64Array,
+  Float32Array
+];
+
+var nonClampedIntArrayConstructors = [
+  Int32Array,
+  Int16Array,
+  Int8Array,
+  Uint32Array,
+  Uint16Array,
+  Uint8Array
+];
+
+var intArrayConstructors = nonClampedIntArrayConstructors.concat([Uint8ClampedArray]);
+
+// Float16Array is a newer feature
+// adding it to this list unconditionally would cause implementations lacking it to fail every test which uses it
+if (typeof Float16Array !== 'undefined') {
+  floatArrayConstructors.push(Float16Array);
+}
+
+/**
+ * Array containing every non-bigint typed array constructor.
+ */
+
+var typedArrayConstructors = floatArrayConstructors.concat(intArrayConstructors);
+
+/**
+ * The %TypedArray% intrinsic constructor function.
+ */
+var TypedArray = Object.getPrototypeOf(Int8Array);
+
+/**
+ * Callback for testing a typed array constructor.
+ *
+ * @callback typedArrayConstructorCallback
+ * @param {Function} Constructor the constructor object to test with.
+ */
+
+/**
+ * Calls the provided function for every typed array constructor.
+ *
+ * @param {typedArrayConstructorCallback} f - the function to call for each typed array constructor.
+ * @param {Array} selected - An optional Array with filtered typed arrays
+ */
+function testWithTypedArrayConstructors(f, selected) {
+  var constructors = selected || typedArrayConstructors;
+  for (var i = 0; i < constructors.length; ++i) {
+    var constructor = constructors[i];
+    try {
+      f(constructor);
+    } catch (e) {
+      e.message += " (Testing with " + constructor.name + ".)";
+      throw e;
+    }
+  }
+}
+
+var nonAtomicsFriendlyTypedArrayConstructors = floatArrayConstructors.concat([Uint8ClampedArray]);
+/**
+ * Calls the provided function for every non-"Atomics Friendly" typed array constructor.
+ *
+ * @param {typedArrayConstructorCallback} f - the function to call for each typed array constructor.
+ * @param {Array} selected - An optional Array with filtered typed arrays
+ */
+function testWithNonAtomicsFriendlyTypedArrayConstructors(f) {
+  testWithTypedArrayConstructors(f, nonAtomicsFriendlyTypedArrayConstructors);
+}
+
+/**
+ * Calls the provided function for every "Atomics Friendly" typed array constructor.
+ *
+ * @param {typedArrayConstructorCallback} f - the function to call for each typed array constructor.
+ * @param {Array} selected - An optional Array with filtered typed arrays
+ */
+function testWithAtomicsFriendlyTypedArrayConstructors(f) {
+  testWithTypedArrayConstructors(f, [
+    Int32Array,
+    Int16Array,
+    Int8Array,
+    Uint32Array,
+    Uint16Array,
+    Uint8Array,
+  ]);
+}
+
+/**
+ * Helper for conversion operations on TypedArrays, the expected values
+ * properties are indexed in order to match the respective value for each
+ * TypedArray constructor
+ * @param  {Function} fn - the function to call for each constructor and value.
+ *                         will be called with the constructor, value, expected
+ *                         value, and a initial value that can be used to avoid
+ *                         a false positive with an equivalent expected value.
+ */
+function testTypedArrayConversions(byteConversionValues, fn) {
+  var values = byteConversionValues.values;
+  var expected = byteConversionValues.expected;
+
+  testWithTypedArrayConstructors(function(TA) {
+    var name = TA.name.slice(0, -5);
+
+    return values.forEach(function(value, index) {
+      var exp = expected[name][index];
+      var initial = 0;
+      if (exp === 0) {
+        initial = 1;
+      }
+      fn(TA, value, exp, initial);
+    });
+  });
+}
+
+/**
+ * Checks if the given argument is one of the float-based TypedArray constructors.
+ *
+ * @param {constructor} ctor - the value to check
+ * @returns {boolean}
+ */
+function isFloatTypedArrayConstructor(arg) {
+  return floatArrayConstructors.indexOf(arg) !== -1;
+}
+
+/**
+ * Determines the precision of the given float-based TypedArray constructor.
+ *
+ * @param {constructor} ctor - the value to check
+ * @returns {string} "half", "single", or "double" for Float16Array, Float32Array, and Float64Array respectively.
+ */
+function floatTypedArrayConstructorPrecision(FA) {
+  if (typeof Float16Array !== "undefined" && FA === Float16Array) {
+    return "half";
+  } else if (FA === Float32Array) {
+    return "single";
+  } else if (FA === Float64Array) {
+    return "double";
+  } else {
+    throw new Error("Malformed test - floatTypedArrayConstructorPrecision called with non-float TypedArray");
+  }
+}
diff --git a/js/src/tests/test262/built-ins/Array/prototype/findIndex/array-altered-during-loop.js b/js/src/tests/test262/built-ins/Array/prototype/findIndex/array-altered-during-loop.js
new file mode 100644
index 0000000000..0a51a82754
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/findIndex/array-altered-during-loop.js
@@ -0,0 +1,49 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.findindex
+description: >
+  The range of elements processed is set before the first call to `predicate`.
+info: |
+  22.1.3.9 Array.prototype.findIndex ( predicate[ , thisArg ] )
+
+  ...
+  6. If thisArg was supplied, let T be thisArg; else let T be undefined.
+  7. Let k be 0.
+  8. Repeat, while k < len
+    ...
+    d. Let testResult be ToBoolean(Call(predicate, T, «kValue, k, O»)).
+  ...
+---*/
+
+var arr = ['Shoes', 'Car', 'Bike'];
+var results = [];
+
+arr.findIndex(function(kValue) {
+  if (results.length === 0) {
+    arr.splice(1, 1);
+  }
+  results.push(kValue);
+});
+
+assert.sameValue(results.length, 3, 'predicate called three times');
+assert.sameValue(results[0], 'Shoes');
+assert.sameValue(results[1], 'Bike');
+assert.sameValue(results[2], undefined);
+
+results = [];
+arr = ['Skateboard', 'Barefoot'];
+arr.findIndex(function(kValue) {
+  if (results.length === 0) {
+    arr.push('Motorcycle');
+    arr[1] = 'Magic Carpet';
+  }
+
+  results.push(kValue);
+});
+
+assert.sameValue(results.length, 2, 'predicate called twice');
+assert.sameValue(results[0], 'Skateboard');
+assert.sameValue(results[1], 'Magic Carpet');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/findIndex/browser.js b/js/src/tests/test262/built-ins/Array/prototype/findIndex/browser.js
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/js/src/tests/test262/built-ins/Array/prototype/findIndex/call-with-boolean.js b/js/src/tests/test262/built-ins/Array/prototype/findIndex/call-with-boolean.js
new file mode 100644
index 0000000000..fe775ec2f4
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/findIndex/call-with-boolean.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2020 Rick Waldron.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.findIndex
+description: Array.prototype.findIndex applied to boolean primitive
+---*/
+
+assert.sameValue(
+  Array.prototype.findIndex.call(true, () => {}),
+  -1,
+  'Array.prototype.findIndex.call(true, () => {}) must return -1'
+);
+assert.sameValue(
+  Array.prototype.findIndex.call(false, () => {}),
+  -1,
+  'Array.prototype.findIndex.call(false, () => {}) must return -1'
+);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/findIndex/callbackfn-resize-arraybuffer.js b/js/src/tests/test262/built-ins/Array/prototype/findIndex/callbackfn-resize-arraybuffer.js
new file mode 100644
index 0000000000..dbd5c88d63
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/findIndex/callbackfn-resize-arraybuffer.js
@@ -0,0 +1,76 @@
+// |reftest| shell-option(--enable-arraybuffer-resizable) skip-if(!ArrayBuffer.prototype.resize||!xulRuntime.shell) -- resizable-arraybuffer is not enabled unconditionally, requires shell-options
+// Copyright (C) 2021 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.findindex
+description: TypedArray instance buffer can be resized during iteration
+includes: [testTypedArray.js, compareArray.js]
+features: [TypedArray, resizable-arraybuffer]
+---*/
+
+// If the host chooses to throw as allowed by the specification, the observed
+// behavior will be identical to the case where `ArrayBuffer.prototype.resize`
+// has not been implemented. The following assertion prevents this test from
+// passing in runtimes which have not implemented the method.
+assert.sameValue(typeof ArrayBuffer.prototype.resize, 'function');
+
+testWithTypedArrayConstructors(function(TA) {
+  var BPE = TA.BYTES_PER_ELEMENT;
+  var buffer = new ArrayBuffer(BPE * 3, {maxByteLength: BPE * 4});
+  var sample = new TA(buffer);
+  var finalElement, expectedElements, expectedIndices, expectedArrays;
+  var elements, indices, arrays, result;
+
+  elements = [];
+  indices = [];
+  arrays = [];
+  result = Array.prototype.findIndex.call(sample, function(element, index, array) {
+    if (elements.length === 0) {
+      try {
+        buffer.resize(2 * BPE);
+        finalElement = undefined;
+        expectedElements = [0, 0];
+        expectedIndices = [0, 1];
+        expectedArrays = [sample, sample];
+      } catch (_) {
+        finalElement = 0;
+        expectedElements = [0, 0, 0];
+        expectedIndices = [0, 1, 2];
+        expectedArrays = [sample, sample, sample];
+      }
+    }
+
+    elements.push(element);
+    indices.push(index);
+    arrays.push(array);
+    return false;
+  });
+
+  assert.compareArray(elements, [0, 0, finalElement], 'elements (shrink)');
+  assert.compareArray(indices, [0, 1, 2], 'indices (shrink)');
+  assert.compareArray(arrays, [sample, sample, sample], 'arrays (shrink)');
+  assert.sameValue(result, -1, 'result (shrink)');
+
+  elements = [];
+  indices = [];
+  arrays = [];
+  result = Array.prototype.findIndex.call(sample, function(element, index, array) {
+    if (elements.length === 0) {
+      try {
+        buffer.resize(4 * BPE);
+      } catch (_) {}
+    }
+
+    elements.push(element);
+    indices.push(index);
+    arrays.push(array);
+    return false;
+  });
+
+  assert.compareArray(elements, expectedElements, 'elements (grow)');
+  assert.compareArray(indices, expectedIndices, 'indices (grow)');
+  assert.compareArray(arrays, expectedArrays, 'arrays (grow)');
+  assert.sameValue(result, -1, 'result (grow)');
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/findIndex/length.js b/js/src/tests/test262/built-ins/Array/prototype/findIndex/length.js
new file mode 100644
index 0000000000..dafeb333b1
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/findIndex/length.js
@@ -0,0 +1,20 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.findindex
+description: Array.prototype.findIndex.length value and descriptor.
+info: |
+  17 ECMAScript Standard Built-in Objects
+includes: [propertyHelper.js]
+---*/
+
+assert.sameValue(
+  Array.prototype.findIndex.length, 1,
+  'The value of `Array.prototype.findIndex.length` is `1`'
+);
+
+verifyNotEnumerable(Array.prototype.findIndex, 'length');
+verifyNotWritable(Array.prototype.findIndex, 'length');
+verifyConfigurable(Array.prototype.findIndex, 'length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/findIndex/name.js b/js/src/tests/test262/built-ins/Array/prototype/findIndex/name.js
new file mode 100644
index 0000000000..ad6b6d5a28
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/findIndex/name.js
@@ -0,0 +1,24 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.findindex
+description: >
+  Array.prototype.findIndex.name value and descriptor.
+info: |
+  22.1.3.9 Array.prototype.findIndex ( predicate [ , thisArg ] )
+
+  17 ECMAScript Standard Built-in Objects
+
+includes: [propertyHelper.js]
+---*/
+
+assert.sameValue(
+  Array.prototype.findIndex.name, 'findIndex',
+  'The value of `Array.prototype.findIndex.name` is `"findIndex"`'
+);
+
+verifyNotEnumerable(Array.prototype.findIndex, 'name');
+verifyNotWritable(Array.prototype.findIndex, 'name');
+verifyConfigurable(Array.prototype.findIndex, 'name');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/findIndex/not-a-constructor.js b/js/src/tests/test262/built-ins/Array/prototype/findIndex/not-a-constructor.js
new file mode 100644
index 0000000000..ce4d52002d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/findIndex/not-a-constructor.js
@@ -0,0 +1,35 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Array.prototype.findIndex does not implement [[Construct]], is not new-able
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+
+  sec-evaluatenew
+
+  ...
+  7. If IsConstructor(constructor) is false, throw a TypeError exception.
+  ...
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Array.prototype.findIndex),
+  false,
+  'isConstructor(Array.prototype.findIndex) must return false'
+);
+
+assert.throws(TypeError, () => {
+  new Array.prototype.findIndex(() => {});
+}, '`new Array.prototype.findIndex(() => {})` throws TypeError');
+
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/findIndex/predicate-call-parameters.js b/js/src/tests/test262/built-ins/Array/prototype/findIndex/predicate-call-parameters.js
new file mode 100644
index 0000000000..cb5505f555
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/findIndex/predicate-call-parameters.js
@@ -0,0 +1,47 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.findindex
+description: >
+  Predicate called as F.call( thisArg, kValue, k, O ) for each array entry.
+info: |
+  22.1.3.9 Array.prototype.findIndex ( predicate[ , thisArg ] )
+
+  ...
+  6. If thisArg was supplied, let T be thisArg; else let T be undefined.
+  7. Let k be 0.
+  8. Repeat, while k < len
+    ...
+    d. Let testResult be ToBoolean(Call(predicate, T, «kValue, k, O»)).
+  ...
+---*/
+
+var arr = ['Mike', 'Rick', 'Leo'];
+
+var results = [];
+
+arr.findIndex(function(kValue, k, O) {
+  results.push(arguments);
+});
+
+assert.sameValue(results.length, 3);
+
+var result = results[0];
+assert.sameValue(result[0], 'Mike');
+assert.sameValue(result[1], 0);
+assert.sameValue(result[2], arr);
+assert.sameValue(result.length, 3);
+
+result = results[1];
+assert.sameValue(result[0], 'Rick');
+assert.sameValue(result[1], 1);
+assert.sameValue(result[2], arr);
+assert.sameValue(result.length, 3);
+
+result = results[2];
+assert.sameValue(result[0], 'Leo');
+assert.sameValue(result[1], 2);
+assert.sameValue(result[2], arr);
+assert.sameValue(result.length, 3);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/findIndex/predicate-call-this-non-strict.js b/js/src/tests/test262/built-ins/Array/prototype/findIndex/predicate-call-this-non-strict.js
new file mode 100644
index 0000000000..9399052631
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/findIndex/predicate-call-this-non-strict.js
@@ -0,0 +1,34 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.findindex
+description: >
+  Predicate thisArg as F.call( thisArg, kValue, k, O ) for each array entry.
+info: |
+  22.1.3.9 Array.prototype.findIndex ( predicate[ , thisArg ] )
+
+  ...
+  8. Repeat, while k < len
+    ...
+    d. Let testResult be ToBoolean(Call(predicate, T, «kValue, k, O»)).
+    e. ReturnIfAbrupt(testResult).
+  ...
+flags: [noStrict]
+---*/
+
+var result;
+
+[1].find(function(kValue, k, O) {
+  result = this;
+});
+
+assert.sameValue(result, this);
+
+var o = {};
+[1].find(function() {
+  result = this;
+}, o);
+
+assert.sameValue(result, o);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/findIndex/predicate-call-this-strict-strict.js b/js/src/tests/test262/built-ins/Array/prototype/findIndex/predicate-call-this-strict-strict.js
new file mode 100644
index 0000000000..5d1029f8da
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/findIndex/predicate-call-this-strict-strict.js
@@ -0,0 +1,35 @@
+'use strict';
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.findindex
+description: >
+  Predicate thisArg as F.call( thisArg, kValue, k, O ) for each array entry.
+info: |
+  22.1.3.9 Array.prototype.findIndex ( predicate[ , thisArg ] )
+
+  ...
+  8. Repeat, while k < len
+    ...
+    d. Let testResult be ToBoolean(Call(predicate, T, «kValue, k, O»)).
+    e. ReturnIfAbrupt(testResult).
+  ...
+flags: [onlyStrict]
+---*/
+
+var result;
+
+[1].find(function(kValue, k, O) {
+  result = this;
+});
+
+assert.sameValue(result, undefined);
+
+var o = {};
+[1].find(function() {
+  result = this;
+}, o);
+
+assert.sameValue(result, o);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/findIndex/predicate-called-for-each-array-property.js b/js/src/tests/test262/built-ins/Array/prototype/findIndex/predicate-called-for-each-array-property.js
new file mode 100644
index 0000000000..b343af598d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/findIndex/predicate-called-for-each-array-property.js
@@ -0,0 +1,28 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.findindex
+description: >
+  Predicate is called for each array property.
+info: |
+  22.1.3.9 Array.prototype.findIndex ( predicate[ , thisArg ] )
+
+  ...
+  6. If thisArg was supplied, let T be thisArg; else let T be undefined.
+  7. Let k be 0.
+  8. Repeat, while k < len
+    ...
+    d. Let testResult be ToBoolean(Call(predicate, T, «kValue, k, O»)).
+  ...
+---*/
+
+var arr = [undefined, , , 'foo'];
+var called = 0;
+
+arr.findIndex(function() {
+  called++;
+});
+
+assert.sameValue(called, 4);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/findIndex/predicate-is-not-callable-throws.js b/js/src/tests/test262/built-ins/Array/prototype/findIndex/predicate-is-not-callable-throws.js
new file mode 100644
index 0000000000..f985fa0aee
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/findIndex/predicate-is-not-callable-throws.js
@@ -0,0 +1,51 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.findindex
+description: >
+  Throws a TypeError exception if predicate is not callable.
+info: |
+  22.1.3.9 Array.prototype.findIndex ( predicate[ , thisArg ] )
+
+  ...
+  5. If IsCallable(predicate) is false, throw a TypeError exception.
+  ...
+---*/
+
+assert.throws(TypeError, function() {
+  [].findIndex({});
+});
+
+assert.throws(TypeError, function() {
+  [].findIndex(null);
+});
+
+assert.throws(TypeError, function() {
+  [].findIndex(undefined);
+});
+
+assert.throws(TypeError, function() {
+  [].findIndex(true);
+});
+
+assert.throws(TypeError, function() {
+  [].findIndex(1);
+});
+
+assert.throws(TypeError, function() {
+  [].findIndex('');
+});
+
+assert.throws(TypeError, function() {
+  [].findIndex(1);
+});
+
+assert.throws(TypeError, function() {
+  [].findIndex([]);
+});
+
+assert.throws(TypeError, function() {
+  [].findIndex(/./);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/findIndex/predicate-not-called-on-empty-array.js b/js/src/tests/test262/built-ins/Array/prototype/findIndex/predicate-not-called-on-empty-array.js
new file mode 100644
index 0000000000..c3bd339896
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/findIndex/predicate-not-called-on-empty-array.js
@@ -0,0 +1,37 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.findindex
+description: >
+  Predicate is only called if this.length is > 0.
+info: |
+  22.1.3.9 Array.prototype.findIndex ( predicate[ , thisArg ] )
+
+  ...
+  7. Let k be 0.
+  8. Repeat, while k < len
+    ...
+    d. Let testResult be ToBoolean(Call(predicate, T, «kValue, k, O»)).
+  ...
+  9. Return -1.
+---*/
+
+var called = false;
+
+var predicate = function() {
+  called = true;
+  return true;
+};
+
+var result = [].findIndex(predicate);
+
+assert.sameValue(
+  called, false,
+  '[].findIndex(predicate) does not call predicate'
+);
+assert.sameValue(
+  result, -1,
+  '[].findIndex(predicate) returned undefined'
+);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/findIndex/prop-desc.js b/js/src/tests/test262/built-ins/Array/prototype/findIndex/prop-desc.js
new file mode 100644
index 0000000000..c894ccf968
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/findIndex/prop-desc.js
@@ -0,0 +1,21 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.findindex
+description: Property type and descriptor.
+info: |
+  17 ECMAScript Standard Built-in Objects
+includes: [propertyHelper.js]
+---*/
+
+assert.sameValue(
+  typeof Array.prototype.findIndex,
+  'function',
+  '`typeof Array.prototype.findIndex` is `function`'
+);
+
+verifyNotEnumerable(Array.prototype, 'findIndex');
+verifyWritable(Array.prototype, 'findIndex');
+verifyConfigurable(Array.prototype, 'findIndex');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/findIndex/return-abrupt-from-predicate-call.js b/js/src/tests/test262/built-ins/Array/prototype/findIndex/return-abrupt-from-predicate-call.js
new file mode 100644
index 0000000000..41e0b25bd5
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/findIndex/return-abrupt-from-predicate-call.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.findindex
+description: >
+  Return abrupt from predicate call.
+info: |
+  22.1.3.9 Array.prototype.findIndex ( predicate[ , thisArg ] )
+
+  ...
+  7. Let k be 0.
+  8. Repeat, while k < len
+    ...
+    d. Let testResult be ToBoolean(Call(predicate, T, «kValue, k, O»)).
+    e. ReturnIfAbrupt(testResult).
+  ...
+---*/
+
+var predicate = function() {
+  throw new Test262Error();
+};
+
+assert.throws(Test262Error, function() {
+  [1].findIndex(predicate);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/findIndex/return-abrupt-from-property.js b/js/src/tests/test262/built-ins/Array/prototype/findIndex/return-abrupt-from-property.js
new file mode 100644
index 0000000000..641f324b13
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/findIndex/return-abrupt-from-property.js
@@ -0,0 +1,33 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.findindex
+description: >
+  Returns abrupt from getting property value from `this`.
+info: |
+  22.1.3.9 Array.prototype.findIndex ( predicate[ , thisArg ] )
+
+  ...
+  7. Let k be 0.
+  8. Repeat, while k < len
+    a. Let Pk be ToString(k).
+    b. Let kValue be Get(O, Pk).
+    c. ReturnIfAbrupt(kValue).
+  ...
+---*/
+
+var o = {
+  length: 1
+};
+
+Object.defineProperty(o, 0, {
+  get: function() {
+    throw new Test262Error();
+  }
+});
+
+assert.throws(Test262Error, function() {
+  [].findIndex.call(o, function() {});
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/findIndex/return-abrupt-from-this-length-as-symbol.js b/js/src/tests/test262/built-ins/Array/prototype/findIndex/return-abrupt-from-this-length-as-symbol.js
new file mode 100644
index 0000000000..3884770242
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/findIndex/return-abrupt-from-this-length-as-symbol.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.findindex
+description: >
+  Return abrupt from ToLength(Get(O, "length")) where length is a Symbol.
+info: |
+  22.1.3.9 Array.prototype.findIndex ( predicate[ , thisArg ] )
+
+  1. Let O be ToObject(this value).
+  2. ReturnIfAbrupt(O).
+  3. Let len be ToLength(Get(O, "length")).
+  4. ReturnIfAbrupt(len).
+  ...
+features: [Symbol]
+---*/
+
+var o = {};
+
+o.length = Symbol(1);
+
+// predicate fn is given to avoid false positives
+assert.throws(TypeError, function() {
+  [].findIndex.call(o, function() {});
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/findIndex/return-abrupt-from-this-length.js b/js/src/tests/test262/built-ins/Array/prototype/findIndex/return-abrupt-from-this-length.js
new file mode 100644
index 0000000000..152e05756b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/findIndex/return-abrupt-from-this-length.js
@@ -0,0 +1,40 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.findindex
+description: >
+  Return abrupt from ToLength(Get(O, "length")).
+info: |
+  22.1.3.9 Array.prototype.findIndex ( predicate[ , thisArg ] )
+
+  1. Let O be ToObject(this value).
+  2. ReturnIfAbrupt(O).
+  3. Let len be ToLength(Get(O, "length")).
+  4. ReturnIfAbrupt(len).
+---*/
+
+var o1 = {};
+
+Object.defineProperty(o1, 'length', {
+  get: function() {
+    throw new Test262Error();
+  },
+  configurable: true
+});
+// predicate fn is given to avoid false positives
+assert.throws(Test262Error, function() {
+  [].findIndex.call(o1, function() {});
+});
+
+var o2 = {
+  length: {
+    valueOf: function() {
+      throw new Test262Error();
+    }
+  }
+};
+assert.throws(Test262Error, function() {
+  [].findIndex.call(o2, function() {});
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/findIndex/return-abrupt-from-this.js b/js/src/tests/test262/built-ins/Array/prototype/findIndex/return-abrupt-from-this.js
new file mode 100644
index 0000000000..88e0ca0b38
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/findIndex/return-abrupt-from-this.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.findindex
+description: >
+  Return abrupt from ToObject(this value).
+info: |
+  22.1.3.9 Array.prototype.findIndex ( predicate[ , thisArg ] )
+
+  1. Let O be ToObject(this value).
+  2. ReturnIfAbrupt(O).
+---*/
+
+// predicate fn is given to avoid false positives
+assert.throws(TypeError, function() {
+  Array.prototype.findIndex.call(undefined, function() {});
+});
+
+assert.throws(TypeError, function() {
+  Array.prototype.findIndex.call(null, function() {});
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/findIndex/return-index-predicate-result-is-true.js b/js/src/tests/test262/built-ins/Array/prototype/findIndex/return-index-predicate-result-is-true.js
new file mode 100644
index 0000000000..a327f75137
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/findIndex/return-index-predicate-result-is-true.js
@@ -0,0 +1,65 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.findindex
+description: >
+  Return index if predicate return a boolean true value.
+info: |
+  22.1.3.9 Array.prototype.findIndex ( predicate[ , thisArg ] )
+
+  ...
+  8. Repeat, while k < len
+    ...
+    d. Let testResult be ToBoolean(Call(predicate, T, «kValue, k, O»)).
+    e. ReturnIfAbrupt(testResult).
+    f. If testResult is true, return k.
+  ...
+features: [Symbol]
+---*/
+
+var arr = ['Shoes', 'Car', 'Bike'];
+var called = 0;
+
+var result = arr.findIndex(function(val) {
+  called++;
+  return true;
+});
+
+assert.sameValue(result, 0);
+assert.sameValue(called, 1, 'predicate was called once');
+
+called = 0;
+result = arr.findIndex(function(val) {
+  called++;
+  return val === 'Bike';
+});
+
+assert.sameValue(called, 3, 'predicate was called three times');
+assert.sameValue(result, 2);
+
+result = arr.findIndex(function(val) {
+  return 'string';
+});
+assert.sameValue(result, 0, 'coerced string');
+
+result = arr.findIndex(function(val) {
+  return {};
+});
+assert.sameValue(result, 0, 'coerced object');
+
+result = arr.findIndex(function(val) {
+  return Symbol('');
+});
+assert.sameValue(result, 0, 'coerced Symbol');
+
+result = arr.findIndex(function(val) {
+  return 1;
+});
+assert.sameValue(result, 0, 'coerced number');
+
+result = arr.findIndex(function(val) {
+  return -1;
+});
+assert.sameValue(result, 0, 'coerced negative number');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/findIndex/return-negative-one-if-predicate-returns-false-value.js b/js/src/tests/test262/built-ins/Array/prototype/findIndex/return-negative-one-if-predicate-returns-false-value.js
new file mode 100644
index 0000000000..419ec5ccce
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/findIndex/return-negative-one-if-predicate-returns-false-value.js
@@ -0,0 +1,55 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.findindex
+description: >
+  Return -1 if predicate always returns a boolean false value.
+info: |
+  22.1.3.9 Array.prototype.findIndex ( predicate[ , thisArg ] )
+
+  ...
+  8. Repeat, while k < len
+    ...
+    d. Let testResult be ToBoolean(Call(predicate, T, «kValue, k, O»)).
+    ...
+  9. Return -1.
+features: [Symbol]
+---*/
+
+var arr = ['Shoes', 'Car', 'Bike'];
+var called = 0;
+
+var result = arr.findIndex(function(val) {
+  called++;
+  return false;
+});
+
+assert.sameValue(called, 3, 'predicate was called three times');
+assert.sameValue(result, -1);
+
+result = arr.findIndex(function(val) {
+  return '';
+});
+assert.sameValue(result, -1, 'coerced string');
+
+result = arr.findIndex(function(val) {
+  return undefined;
+});
+assert.sameValue(result, -1, 'coerced undefined');
+
+result = arr.findIndex(function(val) {
+  return null;
+});
+assert.sameValue(result, -1, 'coerced null');
+
+result = arr.findIndex(function(val) {
+  return 0;
+});
+assert.sameValue(result, -1, 'coerced 0');
+
+result = arr.findIndex(function(val) {
+  return NaN;
+});
+assert.sameValue(result, -1, 'coerced NaN');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/findIndex/shell.js b/js/src/tests/test262/built-ins/Array/prototype/findIndex/shell.js
new file mode 100644
index 0000000000..05fecd6ef1
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/findIndex/shell.js
@@ -0,0 +1,161 @@
+// GENERATED, DO NOT EDIT
+// file: testTypedArray.js
+// Copyright (C) 2015 André Bargull. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+description: |
+    Collection of functions used to assert the correctness of TypedArray objects.
+defines:
+  - floatArrayConstructors
+  - nonClampedIntArrayConstructors
+  - intArrayConstructors
+  - typedArrayConstructors
+  - TypedArray
+  - testWithTypedArrayConstructors
+  - nonAtomicsFriendlyTypedArrayConstructors
+  - testWithAtomicsFriendlyTypedArrayConstructors
+  - testWithNonAtomicsFriendlyTypedArrayConstructors
+  - testTypedArrayConversions
+---*/
+
+var floatArrayConstructors = [
+  Float64Array,
+  Float32Array
+];
+
+var nonClampedIntArrayConstructors = [
+  Int32Array,
+  Int16Array,
+  Int8Array,
+  Uint32Array,
+  Uint16Array,
+  Uint8Array
+];
+
+var intArrayConstructors = nonClampedIntArrayConstructors.concat([Uint8ClampedArray]);
+
+// Float16Array is a newer feature
+// adding it to this list unconditionally would cause implementations lacking it to fail every test which uses it
+if (typeof Float16Array !== 'undefined') {
+  floatArrayConstructors.push(Float16Array);
+}
+
+/**
+ * Array containing every non-bigint typed array constructor.
+ */
+
+var typedArrayConstructors = floatArrayConstructors.concat(intArrayConstructors);
+
+/**
+ * The %TypedArray% intrinsic constructor function.
+ */
+var TypedArray = Object.getPrototypeOf(Int8Array);
+
+/**
+ * Callback for testing a typed array constructor.
+ *
+ * @callback typedArrayConstructorCallback
+ * @param {Function} Constructor the constructor object to test with.
+ */
+
+/**
+ * Calls the provided function for every typed array constructor.
+ *
+ * @param {typedArrayConstructorCallback} f - the function to call for each typed array constructor.
+ * @param {Array} selected - An optional Array with filtered typed arrays
+ */
+function testWithTypedArrayConstructors(f, selected) {
+  var constructors = selected || typedArrayConstructors;
+  for (var i = 0; i < constructors.length; ++i) {
+    var constructor = constructors[i];
+    try {
+      f(constructor);
+    } catch (e) {
+      e.message += " (Testing with " + constructor.name + ".)";
+      throw e;
+    }
+  }
+}
+
+var nonAtomicsFriendlyTypedArrayConstructors = floatArrayConstructors.concat([Uint8ClampedArray]);
+/**
+ * Calls the provided function for every non-"Atomics Friendly" typed array constructor.
+ *
+ * @param {typedArrayConstructorCallback} f - the function to call for each typed array constructor.
+ * @param {Array} selected - An optional Array with filtered typed arrays
+ */
+function testWithNonAtomicsFriendlyTypedArrayConstructors(f) {
+  testWithTypedArrayConstructors(f, nonAtomicsFriendlyTypedArrayConstructors);
+}
+
+/**
+ * Calls the provided function for every "Atomics Friendly" typed array constructor.
+ *
+ * @param {typedArrayConstructorCallback} f - the function to call for each typed array constructor.
+ * @param {Array} selected - An optional Array with filtered typed arrays
+ */
+function testWithAtomicsFriendlyTypedArrayConstructors(f) {
+  testWithTypedArrayConstructors(f, [
+    Int32Array,
+    Int16Array,
+    Int8Array,
+    Uint32Array,
+    Uint16Array,
+    Uint8Array,
+  ]);
+}
+
+/**
+ * Helper for conversion operations on TypedArrays, the expected values
+ * properties are indexed in order to match the respective value for each
+ * TypedArray constructor
+ * @param  {Function} fn - the function to call for each constructor and value.
+ *                         will be called with the constructor, value, expected
+ *                         value, and a initial value that can be used to avoid
+ *                         a false positive with an equivalent expected value.
+ */
+function testTypedArrayConversions(byteConversionValues, fn) {
+  var values = byteConversionValues.values;
+  var expected = byteConversionValues.expected;
+
+  testWithTypedArrayConstructors(function(TA) {
+    var name = TA.name.slice(0, -5);
+
+    return values.forEach(function(value, index) {
+      var exp = expected[name][index];
+      var initial = 0;
+      if (exp === 0) {
+        initial = 1;
+      }
+      fn(TA, value, exp, initial);
+    });
+  });
+}
+
+/**
+ * Checks if the given argument is one of the float-based TypedArray constructors.
+ *
+ * @param {constructor} ctor - the value to check
+ * @returns {boolean}
+ */
+function isFloatTypedArrayConstructor(arg) {
+  return floatArrayConstructors.indexOf(arg) !== -1;
+}
+
+/**
+ * Determines the precision of the given float-based TypedArray constructor.
+ *
+ * @param {constructor} ctor - the value to check
+ * @returns {string} "half", "single", or "double" for Float16Array, Float32Array, and Float64Array respectively.
+ */
+function floatTypedArrayConstructorPrecision(FA) {
+  if (typeof Float16Array !== "undefined" && FA === Float16Array) {
+    return "half";
+  } else if (FA === Float32Array) {
+    return "single";
+  } else if (FA === Float64Array) {
+    return "double";
+  } else {
+    throw new Error("Malformed test - floatTypedArrayConstructorPrecision called with non-float TypedArray");
+  }
+}
diff --git a/js/src/tests/test262/built-ins/Array/prototype/findLast/array-altered-during-loop.js b/js/src/tests/test262/built-ins/Array/prototype/findLast/array-altered-during-loop.js
new file mode 100644
index 0000000000..99746b971a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/findLast/array-altered-during-loop.js
@@ -0,0 +1,49 @@
+// Copyright (C) 2021 Microsoft. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.findlast
+description: >
+  The range of elements processed is set before the first call to `predicate`.
+info: |
+  Array.prototype.findLast ( predicate[ , thisArg ] )
+
+  ...
+  4. Let k be len - 1.
+  5. Repeat, while k ≥ 0,
+  ...
+  c. Let testResult be ! ToBoolean(? Call(predicate, thisArg, « kValue, 𝔽(k), O »)).
+  ...
+features: [array-find-from-last]
+---*/
+
+var arr = ['Shoes', 'Car', 'Bike'];
+var results = [];
+
+arr.findLast(function(kValue) {
+  if (results.length === 0) {
+    arr.splice(1, 1);
+  }
+  results.push(kValue);
+});
+
+assert.sameValue(results.length, 3, 'predicate called three times');
+assert.sameValue(results[0], 'Bike');
+assert.sameValue(results[1], 'Bike');
+assert.sameValue(results[2], 'Shoes');
+
+results = [];
+arr = ['Skateboard', 'Barefoot'];
+arr.findLast(function(kValue) {
+  if (results.length === 0) {
+    arr.push('Motorcycle');
+    arr[0] = 'Magic Carpet';
+  }
+
+  results.push(kValue);
+});
+
+assert.sameValue(results.length, 2, 'predicate called twice');
+assert.sameValue(results[0], 'Barefoot');
+assert.sameValue(results[1], 'Magic Carpet');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/findLast/browser.js b/js/src/tests/test262/built-ins/Array/prototype/findLast/browser.js
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/js/src/tests/test262/built-ins/Array/prototype/findLast/call-with-boolean.js b/js/src/tests/test262/built-ins/Array/prototype/findLast/call-with-boolean.js
new file mode 100644
index 0000000000..7f7a75ac7c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/findLast/call-with-boolean.js
@@ -0,0 +1,21 @@
+// Copyright (C) 2021 Microsoft. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.findlast
+description: Array.prototype.findLast applied to boolean primitive.
+features: [array-find-from-last]
+---*/
+
+assert.sameValue(
+  Array.prototype.findLast.call(true, () => {}),
+  undefined,
+  'Array.prototype.findLast.call(true, () => {}) must return undefined'
+);
+assert.sameValue(
+  Array.prototype.findLast.call(false, () => {}),
+  undefined,
+  'Array.prototype.findLast.call(false, () => {}) must return undefined'
+);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/findLast/callbackfn-resize-arraybuffer.js b/js/src/tests/test262/built-ins/Array/prototype/findLast/callbackfn-resize-arraybuffer.js
new file mode 100644
index 0000000000..1f029bde80
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/findLast/callbackfn-resize-arraybuffer.js
@@ -0,0 +1,76 @@
+// |reftest| shell-option(--enable-arraybuffer-resizable) skip-if(!ArrayBuffer.prototype.resize||!xulRuntime.shell) -- resizable-arraybuffer is not enabled unconditionally, requires shell-options
+// Copyright (C) 2021 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.findlast
+description: TypedArray instance buffer can be resized during iteration
+includes: [testTypedArray.js, compareArray.js]
+features: [TypedArray, resizable-arraybuffer]
+---*/
+
+// If the host chooses to throw as allowed by the specification, the observed
+// behavior will be identical to the case where `ArrayBuffer.prototype.resize`
+// has not been implemented. The following assertion prevents this test from
+// passing in runtimes which have not implemented the method.
+assert.sameValue(typeof ArrayBuffer.prototype.resize, 'function');
+
+testWithTypedArrayConstructors(function(TA) {
+  var BPE = TA.BYTES_PER_ELEMENT;
+  var buffer = new ArrayBuffer(BPE * 3, {maxByteLength: BPE * 4});
+  var sample = new TA(buffer);
+  var secondElement, expectedElements, expectedIndices, expectedArrays;
+  var elements, indices, arrays, result;
+
+  elements = [];
+  indices = [];
+  arrays = [];
+  result = Array.prototype.findLast.call(sample, function(element, index, array) {
+    if (elements.length === 0) {
+      try {
+        buffer.resize(BPE);
+        secondElement = undefined;
+        expectedElements = [0];
+        expectedIndices = [0];
+        expectedArrays = [sample];
+      } catch (_) {
+        secondElement = 0;
+        expectedElements = [0, 0, 0];
+        expectedIndices = [2, 1, 0];
+        expectedArrays = [sample, sample, sample];
+      }
+    }
+
+    elements.push(element);
+    indices.push(index);
+    arrays.push(array);
+    return false;
+  });
+
+  assert.compareArray(elements, [0, secondElement, 0], 'elements (shrink)');
+  assert.compareArray(indices, [2, 1, 0], 'indices (shrink)');
+  assert.compareArray(arrays, [sample, sample, sample], 'arrays (shrink)');
+  assert.sameValue(result, undefined, 'result (shrink)');
+
+  elements = [];
+  indices = [];
+  arrays = [];
+  result = Array.prototype.findLast.call(sample, function(element, index, array) {
+    if (elements.length === 0) {
+      try {
+        buffer.resize(4 * BPE);
+      } catch (_) {}
+    }
+
+    elements.push(element);
+    indices.push(index);
+    arrays.push(array);
+    return false;
+  });
+
+  assert.compareArray(elements, expectedElements, 'elements (grow)');
+  assert.compareArray(indices, expectedIndices, 'indices (grow)');
+  assert.compareArray(arrays, expectedArrays, 'arrays (grow)');
+  assert.sameValue(result, undefined, 'result (grow)');
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/findLast/length.js b/js/src/tests/test262/built-ins/Array/prototype/findLast/length.js
new file mode 100644
index 0000000000..772d631d06
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/findLast/length.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2021 Microsoft. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.findlast
+description: Array.prototype.findLast.length value and descriptor.
+info: |
+  17 ECMAScript Standard Built-in Objects
+includes: [propertyHelper.js]
+features: [array-find-from-last]
+---*/
+
+assert.sameValue(
+  Array.prototype.findLast.length, 1,
+  'The value of `Array.prototype.findLast.length` is `1`'
+);
+
+verifyProperty(Array.prototype.findLast, "length", {
+  enumerable: false,
+  writable: false,
+  configurable: true
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/findLast/maximum-index.js b/js/src/tests/test262/built-ins/Array/prototype/findLast/maximum-index.js
new file mode 100644
index 0000000000..32259c3a62
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/findLast/maximum-index.js
@@ -0,0 +1,38 @@
+// Copyright (C) 2023 Richard Gibson. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.findlast
+description: >
+  Support the maximum valid integer index.
+info: |
+  Array.prototype.findLast ( predicate [ , thisArg ] )
+
+  1. Let O be ? ToObject(this value).
+  2. Let len be ? LengthOfArrayLike(O).
+
+  LengthOfArrayLike ( obj )
+
+  1. Return ℝ(? ToLength(? Get(obj, "length"))).
+
+  ToLength ( argument )
+
+  1. Let len be ? ToIntegerOrInfinity(argument).
+  2. If len ≤ 0, return +0𝔽.
+  3. Return 𝔽(min(len, 2**53 - 1)).
+features: [array-find-from-last]
+---*/
+
+var tooBigLength = Number.MAX_VALUE;
+var maxExpectedIndex = 9007199254740990;
+var arrayLike = { length: tooBigLength };
+var calledWithIndex = [];
+
+Array.prototype.findLast.call(arrayLike, function(_value, index) {
+  calledWithIndex.push(index);
+  return true;
+});
+
+assert.sameValue(calledWithIndex.length, 1, 'predicate invoked once');
+assert.sameValue(calledWithIndex[0], maxExpectedIndex);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/findLast/name.js b/js/src/tests/test262/built-ins/Array/prototype/findLast/name.js
new file mode 100644
index 0000000000..4188b3d7f9
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/findLast/name.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2021 Microsoft. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.findlast
+description: >
+  Array.prototype.findLast.name value and descriptor.
+info: |
+  Array.prototype.findLast ( predicate [ , thisArg ] )
+
+  17 ECMAScript Standard Built-in Objects
+
+includes: [propertyHelper.js]
+features: [array-find-from-last]
+---*/
+
+assert.sameValue(
+  Array.prototype.findLast.name, 'findLast',
+  'The value of `Array.prototype.findLast.name` is `"findLast"`'
+);
+
+verifyProperty(Array.prototype.findLast, "name", {
+  enumerable: false,
+  writable: false,
+  configurable: true
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/findLast/not-a-constructor.js b/js/src/tests/test262/built-ins/Array/prototype/findLast/not-a-constructor.js
new file mode 100644
index 0000000000..9b2316f054
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/findLast/not-a-constructor.js
@@ -0,0 +1,31 @@
+// Copyright (C) 2021 Microsoft. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Array.prototype.findLast does not implement [[Construct]], is not new-able.
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+
+  sec-evaluatenew
+
+  ...
+  7. If IsConstructor(constructor) is false, throw a TypeError exception.
+  ...
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function, array-find-from-last]
+---*/
+
+assert.sameValue(isConstructor(Array.prototype.findLast), false, 'isConstructor(Array.prototype.findLast) must return false');
+
+assert.throws(TypeError, () => {
+  new Array.prototype.findLast(() => {});
+}, '`new Array.prototype.findLast(() => {})` throws TypeError');
+
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/findLast/predicate-call-parameters.js b/js/src/tests/test262/built-ins/Array/prototype/findLast/predicate-call-parameters.js
new file mode 100644
index 0000000000..7165a68110
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/findLast/predicate-call-parameters.js
@@ -0,0 +1,48 @@
+// Copyright (C) 2021 Microsoft. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.findlast
+description: >
+  Predicate called as F.call( thisArg, kValue, k, O ) for each array entry.
+info: |
+  Array.prototype.findLast ( predicate[ , thisArg ] )
+
+  ...
+  4. Let k be len - 1.
+  5. Repeat, while k ≥ 0,
+    ...
+    c. Let testResult be ! ToBoolean(? Call(predicate, thisArg, « kValue, 𝔽(k), O »)).
+    d. If testResult is true, return kValue.
+  ...
+features: [array-find-from-last]
+---*/
+
+var arr = ['Mike', 'Rick', 'Leo'];
+
+var results = [];
+
+arr.findLast(function() {
+  results.push(arguments);
+});
+
+assert.sameValue(results.length, 3);
+
+var result = results[0];
+assert.sameValue(result[0], 'Leo');
+assert.sameValue(result[1], 2);
+assert.sameValue(result[2], arr);
+assert.sameValue(result.length, 3);
+
+result = results[1];
+assert.sameValue(result[0], 'Rick');
+assert.sameValue(result[1], 1);
+assert.sameValue(result[2], arr);
+assert.sameValue(result.length, 3);
+
+result = results[2];
+assert.sameValue(result[0], 'Mike');
+assert.sameValue(result[1], 0);
+assert.sameValue(result[2], arr);
+assert.sameValue(result.length, 3);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/findLast/predicate-call-this-non-strict.js b/js/src/tests/test262/built-ins/Array/prototype/findLast/predicate-call-this-non-strict.js
new file mode 100644
index 0000000000..6b0fa08b5c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/findLast/predicate-call-this-non-strict.js
@@ -0,0 +1,35 @@
+// Copyright (C) 2021 Microsoft. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.findlast
+description: >
+  Predicate thisArg as F.call( thisArg, kValue, k, O ) for each array entry.
+info: |
+  Array.prototype.findLast ( predicate[ , thisArg ] )
+
+  ...
+  5. Repeat, while k ≥ 0,
+    ...
+    c. Let testResult be ! ToBoolean(? Call(predicate, thisArg, « kValue, 𝔽(k), O »)).
+    d. If testResult is true, return kValue.
+  ...
+flags: [noStrict]
+features: [array-find-from-last]
+---*/
+
+var result;
+
+[1].findLast(function() {
+  result = this;
+});
+
+assert.sameValue(result, this);
+
+var o = {};
+[1].findLast(function() {
+  result = this;
+}, o);
+
+assert.sameValue(result, o);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/findLast/predicate-call-this-strict-strict.js b/js/src/tests/test262/built-ins/Array/prototype/findLast/predicate-call-this-strict-strict.js
new file mode 100644
index 0000000000..53f118c7d9
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/findLast/predicate-call-this-strict-strict.js
@@ -0,0 +1,36 @@
+'use strict';
+// Copyright (C) 2021 Microsoft. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.findlast
+description: >
+  Predicate thisArg as F.call( thisArg, kValue, k, O ) for each array entry.
+info: |
+  Array.prototype.findLast ( predicate[ , thisArg ] )
+
+  ...
+  5. Repeat, while k ≥ 0,
+    ...
+    c. Let testResult be ! ToBoolean(? Call(predicate, thisArg, « kValue, 𝔽(k), O »)).
+    d. If testResult is true, return kValue.
+  ...
+flags: [onlyStrict]
+features: [array-find-from-last]
+---*/
+
+var result;
+
+[1].findLast(function() {
+  result = this;
+});
+
+assert.sameValue(result, undefined);
+
+var o = {};
+[1].findLast(function() {
+  result = this;
+}, o);
+
+assert.sameValue(result, o);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/findLast/predicate-called-for-each-array-property.js b/js/src/tests/test262/built-ins/Array/prototype/findLast/predicate-called-for-each-array-property.js
new file mode 100644
index 0000000000..08233f5110
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/findLast/predicate-called-for-each-array-property.js
@@ -0,0 +1,28 @@
+// Copyright (C) 2021 Microsoft. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.findlast
+description: >
+  Predicate is called for each array property.
+info: |
+  Array.prototype.findLast ( predicate[ , thisArg ] )
+
+  ...
+  4. Let k be len - 1.
+  5. Repeat, while k ≥ 0,
+    ...
+    c. Let testResult be ! ToBoolean(? Call(predicate, thisArg, « kValue, 𝔽(k), O »)).
+  ...
+features: [array-find-from-last]
+---*/
+
+var arr = [undefined, , , 'foo'];
+var called = 0;
+
+arr.findLast(function() {
+  called++;
+});
+
+assert.sameValue(called, 4);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/findLast/predicate-is-not-callable-throws.js b/js/src/tests/test262/built-ins/Array/prototype/findLast/predicate-is-not-callable-throws.js
new file mode 100644
index 0000000000..fd8e7d0f98
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/findLast/predicate-is-not-callable-throws.js
@@ -0,0 +1,52 @@
+// Copyright (C) 2021 Microsoft. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.findlast
+description: >
+  Throws a TypeError exception if predicate is not callable.
+info: |
+  Array.prototype.findLast ( predicate[ , thisArg ] )
+
+  ...
+  3. If IsCallable(predicate) is false, throw a TypeError exception.
+  ...
+features: [array-find-from-last]
+---*/
+
+assert.throws(TypeError, function() {
+  [].findLast({});
+});
+
+assert.throws(TypeError, function() {
+  [].findLast(null);
+});
+
+assert.throws(TypeError, function() {
+  [].findLast(undefined);
+});
+
+assert.throws(TypeError, function() {
+  [].findLast(true);
+});
+
+assert.throws(TypeError, function() {
+  [].findLast(1);
+});
+
+assert.throws(TypeError, function() {
+  [].findLast('');
+});
+
+assert.throws(TypeError, function() {
+  [].findLast(1);
+});
+
+assert.throws(TypeError, function() {
+  [].findLast([]);
+});
+
+assert.throws(TypeError, function() {
+  [].findLast(/./);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/findLast/predicate-not-called-on-empty-array.js b/js/src/tests/test262/built-ins/Array/prototype/findLast/predicate-not-called-on-empty-array.js
new file mode 100644
index 0000000000..c922025e33
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/findLast/predicate-not-called-on-empty-array.js
@@ -0,0 +1,32 @@
+// Copyright (C) 2021 Microsoft. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.findlast
+description: >
+  Predicate is only called if this.length is > 0.
+info: |
+  Array.prototype.findLast ( predicate[ , thisArg ] )
+
+  ...
+  4. Let k be len - 1.
+  5. Repeat, while k ≥ 0,
+    ...
+    c. Let testResult be ! ToBoolean(? Call(predicate, thisArg, « kValue, 𝔽(k), O »)).
+  ...
+  6. Return undefined.
+features: [array-find-from-last]
+---*/
+
+var called = false;
+
+var predicate = function() {
+  called = true;
+  return true;
+};
+
+var result = [].findLast(predicate);
+
+assert.sameValue(called, false, '[].findLast(predicate) does not call predicate');
+assert.sameValue(result, undefined, '[].findLast(predicate) returned undefined');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/findLast/prop-desc.js b/js/src/tests/test262/built-ins/Array/prototype/findLast/prop-desc.js
new file mode 100644
index 0000000000..3f66568608
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/findLast/prop-desc.js
@@ -0,0 +1,24 @@
+// Copyright (C) 2021 Microsoft. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.findlast
+description: Property type and descriptor.
+info: |
+  17 ECMAScript Standard Built-in Objects
+includes: [propertyHelper.js]
+features: [array-find-from-last]
+---*/
+
+assert.sameValue(
+  typeof Array.prototype.findLast,
+  'function',
+  '`typeof Array.prototype.findLast` is `function`'
+);
+
+verifyProperty(Array.prototype, "findLast", {
+  enumerable: false,
+  writable: true,
+  configurable: true
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/findLast/return-abrupt-from-predicate-call.js b/js/src/tests/test262/built-ins/Array/prototype/findLast/return-abrupt-from-predicate-call.js
new file mode 100644
index 0000000000..e6d38f74f2
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/findLast/return-abrupt-from-predicate-call.js
@@ -0,0 +1,28 @@
+// Copyright (C) 2021 Microsoft. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.findlast
+description: >
+  Return abrupt from predicate call.
+info: |
+  Array.prototype.findLast ( predicate[ , thisArg ] )
+
+  ...
+  4. Let k be len - 1.
+  5. Repeat, while k ≥ 0,
+    ...
+    c. Let testResult be ! ToBoolean(? Call(predicate, thisArg, « kValue, 𝔽(k), O »)).
+    d. If testResult is true, return kValue.
+  ...
+features: [array-find-from-last]
+---*/
+
+var predicate = function() {
+  throw new Test262Error();
+};
+
+assert.throws(Test262Error, function() {
+  [1].findLast(predicate);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/findLast/return-abrupt-from-property.js b/js/src/tests/test262/built-ins/Array/prototype/findLast/return-abrupt-from-property.js
new file mode 100644
index 0000000000..0462681378
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/findLast/return-abrupt-from-property.js
@@ -0,0 +1,35 @@
+// Copyright (C) 2021 Microsoft. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.findlast
+description: >
+  Returns abrupt from getting property value from `this`.
+info: |
+  Array.prototype.findLast ( predicate[ , thisArg ] )
+
+  ...
+  4. Let k be len - 1.
+  5. Repeat, while k ≥ 0,
+    a. Let Pk be ! ToString(𝔽(k)).
+    b. Let kValue be ? Get(O, Pk).
+    ...
+    d. If testResult is true, return kValue.
+  ...
+features: [array-find-from-last]
+---*/
+
+var o = {
+  length: 1
+};
+
+Object.defineProperty(o, 0, {
+  get: function() {
+    throw new Test262Error();
+  }
+});
+
+assert.throws(Test262Error, function() {
+  [].findLast.call(o, function() {});
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/findLast/return-abrupt-from-this-length-as-symbol.js b/js/src/tests/test262/built-ins/Array/prototype/findLast/return-abrupt-from-this-length-as-symbol.js
new file mode 100644
index 0000000000..3c38d59c0d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/findLast/return-abrupt-from-this-length-as-symbol.js
@@ -0,0 +1,25 @@
+// Copyright (C) 2021 Microsoft. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.findlast
+description: >
+  Return abrupt from ToLength(Get(O, "length")) where length is a Symbol.
+info: |
+  Array.prototype.findLast ( predicate[ , thisArg ] )
+
+  1. Let O be ? ToObject(this value).
+  2. Let len be ? LengthOfArrayLike(O).
+
+features: [Symbol, array-find-from-last]
+---*/
+
+var o = {};
+
+o.length = Symbol(1);
+
+// predicate fn is given to avoid false positives
+assert.throws(TypeError, function() {
+  [].findLast.call(o, function() {});
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/findLast/return-abrupt-from-this-length.js b/js/src/tests/test262/built-ins/Array/prototype/findLast/return-abrupt-from-this-length.js
new file mode 100644
index 0000000000..6c2cd24a37
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/findLast/return-abrupt-from-this-length.js
@@ -0,0 +1,39 @@
+// Copyright (C) 2021 Microsoft. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.findlast
+description: >
+  Return abrupt from ToLength(Get(O, "length")).
+info: |
+  Array.prototype.findLast ( predicate[ , thisArg ] )
+
+  1. Let O be ? ToObject(this value).
+  2. Let len be ? LengthOfArrayLike(O).
+features: [array-find-from-last]
+---*/
+
+var o1 = {};
+
+Object.defineProperty(o1, 'length', {
+  get: function() {
+    throw new Test262Error();
+  },
+  configurable: true
+});
+
+assert.throws(Test262Error, function() {
+  [].findLast.call(o1);
+});
+
+var o2 = {
+  length: {
+    valueOf: function() {
+      throw new Test262Error();
+    }
+  }
+};
+assert.throws(Test262Error, function() {
+  [].findLast.call(o2);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/findLast/return-abrupt-from-this.js b/js/src/tests/test262/built-ins/Array/prototype/findLast/return-abrupt-from-this.js
new file mode 100644
index 0000000000..a24b873282
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/findLast/return-abrupt-from-this.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2021 Microsoft. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.findlast
+description: >
+  Return abrupt from ToObject(this value).
+info: |
+  Array.prototype.findLast ( predicate[ , thisArg ] )
+
+  1. Let O be ? ToObject(this value).
+features: [array-find-from-last]
+---*/
+
+// predicate fn is given to avoid false positives
+assert.throws(TypeError, function() {
+  Array.prototype.findLast.call(undefined, function() {});
+});
+
+assert.throws(TypeError, function() {
+  Array.prototype.findLast.call(null, function() {});
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/findLast/return-found-value-predicate-result-is-true.js b/js/src/tests/test262/built-ins/Array/prototype/findLast/return-found-value-predicate-result-is-true.js
new file mode 100644
index 0000000000..c9026b01ef
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/findLast/return-found-value-predicate-result-is-true.js
@@ -0,0 +1,64 @@
+// Copyright (C) 2021 Microsoft. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.findlast
+description: >
+  Return found value if predicate return a boolean true value.
+info: |
+  Array.prototype.findLast ( predicate[ , thisArg ] )
+
+  ...
+  5. Repeat, while k ≥ 0,
+    ...
+    c. Let testResult be ! ToBoolean(? Call(predicate, thisArg, « kValue, 𝔽(k), O »)).
+    d. If testResult is true, return kValue.
+  ...
+features: [Symbol, array-find-from-last]
+---*/
+
+var arr = ['Shoes', 'Car', 'Bike'];
+var called = 0;
+
+var result = arr.findLast(function() {
+  called++;
+  return true;
+});
+
+assert.sameValue(result, 'Bike');
+assert.sameValue(called, 1, 'predicate was called once');
+
+called = 0;
+result = arr.findLast(function(val) {
+  called++;
+  return val === 'Shoes';
+});
+
+assert.sameValue(called, 3, 'predicate was called three times');
+assert.sameValue(result, 'Shoes');
+
+result = arr.findLast(function() {
+  return 'string';
+});
+assert.sameValue(result, 'Bike', 'coerced string');
+
+result = arr.findLast(function() {
+  return {};
+});
+assert.sameValue(result, 'Bike', 'coerced object');
+
+result = arr.findLast(function() {
+  return Symbol('');
+});
+assert.sameValue(result, 'Bike', 'coerced Symbol');
+
+result = arr.findLast(function() {
+  return 1;
+});
+assert.sameValue(result, 'Bike', 'coerced number');
+
+result = arr.findLast(function() {
+  return -1;
+});
+assert.sameValue(result, 'Bike', 'coerced negative number');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/findLast/return-undefined-if-predicate-returns-false-value.js b/js/src/tests/test262/built-ins/Array/prototype/findLast/return-undefined-if-predicate-returns-false-value.js
new file mode 100644
index 0000000000..6ce25bdaef
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/findLast/return-undefined-if-predicate-returns-false-value.js
@@ -0,0 +1,55 @@
+// Copyright (C) 2021 Microsoft. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.findlast
+description: >
+  Return undefined if predicate always returns a boolean false value.
+info: |
+  Array.prototype.findLast ( predicate[ , thisArg ] )
+
+  ...
+  5. Repeat, while k ≥ 0,
+    ...
+    c. Let testResult be ! ToBoolean(? Call(predicate, thisArg, « kValue, 𝔽(k), O »)).
+    ...
+  6. Return undefined.
+features: [Symbol, array-find-from-last]
+---*/
+
+var arr = ['Shoes', 'Car', 'Bike'];
+var called = 0;
+
+var result = arr.findLast(function() {
+  called++;
+  return false;
+});
+
+assert.sameValue(called, 3, 'predicate was called three times');
+assert.sameValue(result, undefined);
+
+result = arr.findLast(function() {
+  return '';
+});
+assert.sameValue(result, undefined, 'coerced string');
+
+result = arr.findLast(function() {
+  return undefined;
+});
+assert.sameValue(result, undefined, 'coerced undefined');
+
+result = arr.findLast(function() {
+  return null;
+});
+assert.sameValue(result, undefined, 'coerced null');
+
+result = arr.findLast(function() {
+  return 0;
+});
+assert.sameValue(result, undefined, 'coerced 0');
+
+result = arr.findLast(function() {
+  return NaN;
+});
+assert.sameValue(result, undefined, 'coerced NaN');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/findLast/shell.js b/js/src/tests/test262/built-ins/Array/prototype/findLast/shell.js
new file mode 100644
index 0000000000..05fecd6ef1
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/findLast/shell.js
@@ -0,0 +1,161 @@
+// GENERATED, DO NOT EDIT
+// file: testTypedArray.js
+// Copyright (C) 2015 André Bargull. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+description: |
+    Collection of functions used to assert the correctness of TypedArray objects.
+defines:
+  - floatArrayConstructors
+  - nonClampedIntArrayConstructors
+  - intArrayConstructors
+  - typedArrayConstructors
+  - TypedArray
+  - testWithTypedArrayConstructors
+  - nonAtomicsFriendlyTypedArrayConstructors
+  - testWithAtomicsFriendlyTypedArrayConstructors
+  - testWithNonAtomicsFriendlyTypedArrayConstructors
+  - testTypedArrayConversions
+---*/
+
+var floatArrayConstructors = [
+  Float64Array,
+  Float32Array
+];
+
+var nonClampedIntArrayConstructors = [
+  Int32Array,
+  Int16Array,
+  Int8Array,
+  Uint32Array,
+  Uint16Array,
+  Uint8Array
+];
+
+var intArrayConstructors = nonClampedIntArrayConstructors.concat([Uint8ClampedArray]);
+
+// Float16Array is a newer feature
+// adding it to this list unconditionally would cause implementations lacking it to fail every test which uses it
+if (typeof Float16Array !== 'undefined') {
+  floatArrayConstructors.push(Float16Array);
+}
+
+/**
+ * Array containing every non-bigint typed array constructor.
+ */
+
+var typedArrayConstructors = floatArrayConstructors.concat(intArrayConstructors);
+
+/**
+ * The %TypedArray% intrinsic constructor function.
+ */
+var TypedArray = Object.getPrototypeOf(Int8Array);
+
+/**
+ * Callback for testing a typed array constructor.
+ *
+ * @callback typedArrayConstructorCallback
+ * @param {Function} Constructor the constructor object to test with.
+ */
+
+/**
+ * Calls the provided function for every typed array constructor.
+ *
+ * @param {typedArrayConstructorCallback} f - the function to call for each typed array constructor.
+ * @param {Array} selected - An optional Array with filtered typed arrays
+ */
+function testWithTypedArrayConstructors(f, selected) {
+  var constructors = selected || typedArrayConstructors;
+  for (var i = 0; i < constructors.length; ++i) {
+    var constructor = constructors[i];
+    try {
+      f(constructor);
+    } catch (e) {
+      e.message += " (Testing with " + constructor.name + ".)";
+      throw e;
+    }
+  }
+}
+
+var nonAtomicsFriendlyTypedArrayConstructors = floatArrayConstructors.concat([Uint8ClampedArray]);
+/**
+ * Calls the provided function for every non-"Atomics Friendly" typed array constructor.
+ *
+ * @param {typedArrayConstructorCallback} f - the function to call for each typed array constructor.
+ * @param {Array} selected - An optional Array with filtered typed arrays
+ */
+function testWithNonAtomicsFriendlyTypedArrayConstructors(f) {
+  testWithTypedArrayConstructors(f, nonAtomicsFriendlyTypedArrayConstructors);
+}
+
+/**
+ * Calls the provided function for every "Atomics Friendly" typed array constructor.
+ *
+ * @param {typedArrayConstructorCallback} f - the function to call for each typed array constructor.
+ * @param {Array} selected - An optional Array with filtered typed arrays
+ */
+function testWithAtomicsFriendlyTypedArrayConstructors(f) {
+  testWithTypedArrayConstructors(f, [
+    Int32Array,
+    Int16Array,
+    Int8Array,
+    Uint32Array,
+    Uint16Array,
+    Uint8Array,
+  ]);
+}
+
+/**
+ * Helper for conversion operations on TypedArrays, the expected values
+ * properties are indexed in order to match the respective value for each
+ * TypedArray constructor
+ * @param  {Function} fn - the function to call for each constructor and value.
+ *                         will be called with the constructor, value, expected
+ *                         value, and a initial value that can be used to avoid
+ *                         a false positive with an equivalent expected value.
+ */
+function testTypedArrayConversions(byteConversionValues, fn) {
+  var values = byteConversionValues.values;
+  var expected = byteConversionValues.expected;
+
+  testWithTypedArrayConstructors(function(TA) {
+    var name = TA.name.slice(0, -5);
+
+    return values.forEach(function(value, index) {
+      var exp = expected[name][index];
+      var initial = 0;
+      if (exp === 0) {
+        initial = 1;
+      }
+      fn(TA, value, exp, initial);
+    });
+  });
+}
+
+/**
+ * Checks if the given argument is one of the float-based TypedArray constructors.
+ *
+ * @param {constructor} ctor - the value to check
+ * @returns {boolean}
+ */
+function isFloatTypedArrayConstructor(arg) {
+  return floatArrayConstructors.indexOf(arg) !== -1;
+}
+
+/**
+ * Determines the precision of the given float-based TypedArray constructor.
+ *
+ * @param {constructor} ctor - the value to check
+ * @returns {string} "half", "single", or "double" for Float16Array, Float32Array, and Float64Array respectively.
+ */
+function floatTypedArrayConstructorPrecision(FA) {
+  if (typeof Float16Array !== "undefined" && FA === Float16Array) {
+    return "half";
+  } else if (FA === Float32Array) {
+    return "single";
+  } else if (FA === Float64Array) {
+    return "double";
+  } else {
+    throw new Error("Malformed test - floatTypedArrayConstructorPrecision called with non-float TypedArray");
+  }
+}
diff --git a/js/src/tests/test262/built-ins/Array/prototype/findLastIndex/array-altered-during-loop.js b/js/src/tests/test262/built-ins/Array/prototype/findLastIndex/array-altered-during-loop.js
new file mode 100644
index 0000000000..eac5ed5374
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/findLastIndex/array-altered-during-loop.js
@@ -0,0 +1,49 @@
+// Copyright (C) 2021 Microsoft. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.findlastindex
+description: >
+  The range of elements processed is set before the first call to `predicate`.
+info: |
+  Array.prototype.findLastIndex ( predicate[ , thisArg ] )
+
+  ...
+  4. Let k be len - 1.
+  5. Repeat, while k ≥ 0,
+    ...
+    c. Let testResult be ! ToBoolean(? Call(predicate, thisArg, « kValue, 𝔽(k), O »)).
+  ...
+features: [array-find-from-last]
+---*/
+
+var arr = ['Shoes', 'Car', 'Bike'];
+var results = [];
+
+arr.findLastIndex(function(kValue) {
+  if (results.length === 0) {
+    arr.splice(1, 1);
+  }
+  results.push(kValue);
+});
+
+assert.sameValue(results.length, 3, 'predicate called three times');
+assert.sameValue(results[0], 'Bike');
+assert.sameValue(results[1], 'Bike');
+assert.sameValue(results[2], 'Shoes');
+
+results = [];
+arr = ['Skateboard', 'Barefoot'];
+arr.findLastIndex(function(kValue) {
+  if (results.length === 0) {
+    arr.push('Motorcycle');
+    arr[0] = 'Magic Carpet';
+  }
+
+  results.push(kValue);
+});
+
+assert.sameValue(results.length, 2, 'predicate called twice');
+assert.sameValue(results[0], 'Barefoot');
+assert.sameValue(results[1], 'Magic Carpet');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/findLastIndex/browser.js b/js/src/tests/test262/built-ins/Array/prototype/findLastIndex/browser.js
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/js/src/tests/test262/built-ins/Array/prototype/findLastIndex/call-with-boolean.js b/js/src/tests/test262/built-ins/Array/prototype/findLastIndex/call-with-boolean.js
new file mode 100644
index 0000000000..d9565b5641
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/findLastIndex/call-with-boolean.js
@@ -0,0 +1,21 @@
+// Copyright (C) 2021 Microsoft. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.findlastindex
+description: Array.prototype.findLastIndex applied to boolean primitive.
+features: [array-find-from-last]
+---*/
+
+assert.sameValue(
+  Array.prototype.findLastIndex.call(true, () => {}),
+  -1,
+  'Array.prototype.findLastIndex.call(true, () => {}) must return -1'
+);
+assert.sameValue(
+  Array.prototype.findLastIndex.call(false, () => {}),
+  -1,
+  'Array.prototype.findLastIndex.call(false, () => {}) must return -1'
+);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/findLastIndex/callbackfn-resize-arraybuffer.js b/js/src/tests/test262/built-ins/Array/prototype/findLastIndex/callbackfn-resize-arraybuffer.js
new file mode 100644
index 0000000000..3d90fa7f17
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/findLastIndex/callbackfn-resize-arraybuffer.js
@@ -0,0 +1,76 @@
+// |reftest| shell-option(--enable-arraybuffer-resizable) skip-if(!ArrayBuffer.prototype.resize||!xulRuntime.shell) -- resizable-arraybuffer is not enabled unconditionally, requires shell-options
+// Copyright (C) 2021 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.findlastindex
+description: TypedArray instance buffer can be resized during iteration
+includes: [testTypedArray.js, compareArray.js]
+features: [TypedArray, resizable-arraybuffer]
+---*/
+
+// If the host chooses to throw as allowed by the specification, the observed
+// behavior will be identical to the case where `ArrayBuffer.prototype.resize`
+// has not been implemented. The following assertion prevents this test from
+// passing in runtimes which have not implemented the method.
+assert.sameValue(typeof ArrayBuffer.prototype.resize, 'function');
+
+testWithTypedArrayConstructors(function(TA) {
+  var BPE = TA.BYTES_PER_ELEMENT;
+  var buffer = new ArrayBuffer(BPE * 3, {maxByteLength: BPE * 4});
+  var sample = new TA(buffer);
+  var secondElement, expectedElements, expectedIndices, expectedArrays;
+  var elements, indices, arrays, result;
+
+  elements = [];
+  indices = [];
+  arrays = [];
+  result = Array.prototype.findLastIndex.call(sample, function(element, index, array) {
+    if (elements.length === 0) {
+      try {
+        buffer.resize(BPE);
+        secondElement = undefined;
+        expectedElements = [0];
+        expectedIndices = [0];
+        expectedArrays = [sample];
+      } catch (_) {
+        secondElement = 0;
+        expectedElements = [0, 0, 0];
+        expectedIndices = [2, 1, 0];
+        expectedArrays = [sample, sample, sample];
+      }
+    }
+
+    elements.push(element);
+    indices.push(index);
+    arrays.push(array);
+    return false;
+  });
+
+  assert.compareArray(elements, [0, secondElement, 0], 'elements (shrink)');
+  assert.compareArray(indices, [2, 1, 0], 'indices (shrink)');
+  assert.compareArray(arrays, [sample, sample, sample], 'arrays (shrink)');
+  assert.sameValue(result, -1, 'result (shrink)');
+
+  elements = [];
+  indices = [];
+  arrays = [];
+  result = Array.prototype.findLastIndex.call(sample, function(element, index, array) {
+    if (elements.length === 0) {
+      try {
+        buffer.resize(4 * BPE);
+      } catch (_) {}
+    }
+
+    elements.push(element);
+    indices.push(index);
+    arrays.push(array);
+    return false;
+  });
+
+  assert.compareArray(elements, expectedElements, 'elements (grow)');
+  assert.compareArray(indices, expectedIndices, 'indices (grow)');
+  assert.compareArray(arrays, expectedArrays, 'arrays (grow)');
+  assert.sameValue(result, -1, 'result (grow)');
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/findLastIndex/length.js b/js/src/tests/test262/built-ins/Array/prototype/findLastIndex/length.js
new file mode 100644
index 0000000000..f5f3f78354
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/findLastIndex/length.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2021 Microsoft. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.findlastindex
+description: Array.prototype.findLastIndex.length value and descriptor.
+info: |
+  17 ECMAScript Standard Built-in Objects
+includes: [propertyHelper.js]
+features: [array-find-from-last]
+---*/
+
+assert.sameValue(
+  Array.prototype.findLastIndex.length, 1,
+  'The value of `Array.prototype.findLastIndex.length` is `1`'
+);
+
+verifyProperty(Array.prototype.findLastIndex, "length", {
+  enumerable: false,
+  writable: false,
+  configurable: true
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/findLastIndex/maximum-index.js b/js/src/tests/test262/built-ins/Array/prototype/findLastIndex/maximum-index.js
new file mode 100644
index 0000000000..27489250fd
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/findLastIndex/maximum-index.js
@@ -0,0 +1,38 @@
+// Copyright (C) 2023 Richard Gibson. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.findlastindex
+description: >
+  Support the maximum valid integer index.
+info: |
+  Array.prototype.findLastIndex ( predicate [ , thisArg ] )
+
+  1. Let O be ? ToObject(this value).
+  2. Let len be ? LengthOfArrayLike(O).
+
+  LengthOfArrayLike ( obj )
+
+  1. Return ℝ(? ToLength(? Get(obj, "length"))).
+
+  ToLength ( argument )
+
+  1. Let len be ? ToIntegerOrInfinity(argument).
+  2. If len ≤ 0, return +0𝔽.
+  3. Return 𝔽(min(len, 2**53 - 1)).
+features: [array-find-from-last]
+---*/
+
+var tooBigLength = Number.MAX_VALUE;
+var maxExpectedIndex = 9007199254740990;
+var arrayLike = { length: tooBigLength };
+var calledWithIndex = [];
+
+Array.prototype.findLastIndex.call(arrayLike, function(_value, index) {
+  calledWithIndex.push(index);
+  return true;
+});
+
+assert.sameValue(calledWithIndex.length, 1, 'predicate invoked once');
+assert.sameValue(calledWithIndex[0], maxExpectedIndex);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/findLastIndex/name.js b/js/src/tests/test262/built-ins/Array/prototype/findLastIndex/name.js
new file mode 100644
index 0000000000..9307eb0374
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/findLastIndex/name.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2021 Microsoft. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.findlastindex
+description: >
+  Array.prototype.findLastIndex.name value and descriptor.
+info: |
+  Array.prototype.findLastIndex ( predicate [ , thisArg ] )
+
+  17 ECMAScript Standard Built-in Objects
+
+includes: [propertyHelper.js]
+features: [array-find-from-last]
+---*/
+
+assert.sameValue(
+  Array.prototype.findLastIndex.name, 'findLastIndex',
+  'The value of `Array.prototype.findLastIndex.name` is `"findLastIndex"`'
+);
+
+verifyProperty(Array.prototype.findLastIndex, "name", {
+  enumerable: false,
+  writable: false,
+  configurable: true
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/findLastIndex/not-a-constructor.js b/js/src/tests/test262/built-ins/Array/prototype/findLastIndex/not-a-constructor.js
new file mode 100644
index 0000000000..8c6000eea2
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/findLastIndex/not-a-constructor.js
@@ -0,0 +1,35 @@
+// Copyright (C) 2021 Microsoft. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Array.prototype.findLastIndex does not implement [[Construct]], is not new-able.
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+
+  sec-evaluatenew
+
+  ...
+  7. If IsConstructor(constructor) is false, throw a TypeError exception.
+  ...
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function, array-find-from-last]
+---*/
+
+assert.sameValue(
+  isConstructor(Array.prototype.findLastIndex),
+  false,
+  'isConstructor(Array.prototype.findLastIndex) must return false'
+);
+
+assert.throws(TypeError, () => {
+  new Array.prototype.findLastIndex(() => {});
+}, '`new Array.prototype.findLastIndex(() => {})` throws TypeError');
+
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/findLastIndex/predicate-call-parameters.js b/js/src/tests/test262/built-ins/Array/prototype/findLastIndex/predicate-call-parameters.js
new file mode 100644
index 0000000000..02bd2f9182
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/findLastIndex/predicate-call-parameters.js
@@ -0,0 +1,47 @@
+// Copyright (C) 2021 Microsoft. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.findlastindex
+description: >
+  Predicate called as F.call( thisArg, kValue, k, O ) for each array entry.
+info: |
+  Array.prototype.findLastIndex ( predicate[ , thisArg ] )
+
+  ...
+  4. Let k be len - 1.
+  5. Repeat, while k ≥ 0,
+    ...
+    c. Let testResult be ! ToBoolean(? Call(predicate, thisArg, « kValue, 𝔽(k), O »)).
+  ...
+features: [array-find-from-last]
+---*/
+
+var arr = ['Mike', 'Rick', 'Leo'];
+
+var results = [];
+
+arr.findLastIndex(function() {
+  results.push(arguments);
+});
+
+assert.sameValue(results.length, 3);
+
+var result = results[0];
+assert.sameValue(result[0], 'Leo');
+assert.sameValue(result[1], 2);
+assert.sameValue(result[2], arr);
+assert.sameValue(result.length, 3);
+
+result = results[1];
+assert.sameValue(result[0], 'Rick');
+assert.sameValue(result[1], 1);
+assert.sameValue(result[2], arr);
+assert.sameValue(result.length, 3);
+
+result = results[2];
+assert.sameValue(result[0], 'Mike');
+assert.sameValue(result[1], 0);
+assert.sameValue(result[2], arr);
+assert.sameValue(result.length, 3);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/findLastIndex/predicate-call-this-non-strict.js b/js/src/tests/test262/built-ins/Array/prototype/findLastIndex/predicate-call-this-non-strict.js
new file mode 100644
index 0000000000..0179b05f3b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/findLastIndex/predicate-call-this-non-strict.js
@@ -0,0 +1,35 @@
+// Copyright (C) 2021 Microsoft. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.findlastindex
+description: >
+  Predicate thisArg as F.call( thisArg, kValue, k, O ) for each array entry.
+info: |
+  Array.prototype.findLastIndex ( predicate[ , thisArg ] )
+
+  ...
+  5. Repeat, while k ≥ 0,
+    ...
+    c. Let testResult be ! ToBoolean(? Call(predicate, thisArg, « kValue, 𝔽(k), O »)).
+    d. If testResult is true, return 𝔽(k).
+  ...
+flags: [noStrict]
+features: [array-find-from-last]
+---*/
+
+var result;
+
+[1].findLastIndex(function() {
+  result = this;
+});
+
+assert.sameValue(result, this);
+
+var o = {};
+[1].findLastIndex(function() {
+  result = this;
+}, o);
+
+assert.sameValue(result, o);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/findLastIndex/predicate-call-this-strict-strict.js b/js/src/tests/test262/built-ins/Array/prototype/findLastIndex/predicate-call-this-strict-strict.js
new file mode 100644
index 0000000000..3de65dfc2d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/findLastIndex/predicate-call-this-strict-strict.js
@@ -0,0 +1,36 @@
+'use strict';
+// Copyright (C) 2021 Microsoft. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.findlastindex
+description: >
+  Predicate thisArg as F.call( thisArg, kValue, k, O ) for each array entry.
+info: |
+  Array.prototype.findLastIndex ( predicate[ , thisArg ] )
+
+  ...
+  5. Repeat, while k ≥ 0,
+    ...
+    c. Let testResult be ! ToBoolean(? Call(predicate, thisArg, « kValue, 𝔽(k), O »)).
+    d. If testResult is true, return 𝔽(k).
+  ...
+flags: [onlyStrict]
+features: [array-find-from-last]
+---*/
+
+var result;
+
+[1].findLastIndex(function() {
+  result = this;
+});
+
+assert.sameValue(result, undefined);
+
+var o = {};
+[1].findLastIndex(function() {
+  result = this;
+}, o);
+
+assert.sameValue(result, o);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/findLastIndex/predicate-called-for-each-array-property.js b/js/src/tests/test262/built-ins/Array/prototype/findLastIndex/predicate-called-for-each-array-property.js
new file mode 100644
index 0000000000..487719742b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/findLastIndex/predicate-called-for-each-array-property.js
@@ -0,0 +1,28 @@
+// Copyright (C) 2021 Microsoft. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.findlastindex
+description: >
+  Predicate is called for each array property.
+info: |
+  Array.prototype.findLastIndex ( predicate[ , thisArg ] )
+
+  ...
+  4. Let k be len - 1.
+  5. Repeat, while k ≥ 0,
+    ...
+    c. Let testResult be ! ToBoolean(? Call(predicate, thisArg, « kValue, 𝔽(k), O »)).
+  ...
+features: [array-find-from-last]
+---*/
+
+var arr = [undefined, , , 'foo'];
+var called = 0;
+
+arr.findLastIndex(function() {
+  called++;
+});
+
+assert.sameValue(called, 4);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/findLastIndex/predicate-is-not-callable-throws.js b/js/src/tests/test262/built-ins/Array/prototype/findLastIndex/predicate-is-not-callable-throws.js
new file mode 100644
index 0000000000..f45b659578
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/findLastIndex/predicate-is-not-callable-throws.js
@@ -0,0 +1,52 @@
+// Copyright (C) 2021 Microsoft. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.findlastindex
+description: >
+  Throws a TypeError exception if predicate is not callable.
+info: |
+  Array.prototype.findLastIndex ( predicate[ , thisArg ] )
+
+  ...
+  3. If IsCallable(predicate) is false, throw a TypeError exception.
+  ...
+features: [array-find-from-last]
+---*/
+
+assert.throws(TypeError, function() {
+  [].findLastIndex({});
+});
+
+assert.throws(TypeError, function() {
+  [].findLastIndex(null);
+});
+
+assert.throws(TypeError, function() {
+  [].findLastIndex(undefined);
+});
+
+assert.throws(TypeError, function() {
+  [].findLastIndex(true);
+});
+
+assert.throws(TypeError, function() {
+  [].findLastIndex(1);
+});
+
+assert.throws(TypeError, function() {
+  [].findLastIndex('');
+});
+
+assert.throws(TypeError, function() {
+  [].findLastIndex(1);
+});
+
+assert.throws(TypeError, function() {
+  [].findLastIndex([]);
+});
+
+assert.throws(TypeError, function() {
+  [].findLastIndex(/./);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/findLastIndex/predicate-not-called-on-empty-array.js b/js/src/tests/test262/built-ins/Array/prototype/findLastIndex/predicate-not-called-on-empty-array.js
new file mode 100644
index 0000000000..a68e8420b4
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/findLastIndex/predicate-not-called-on-empty-array.js
@@ -0,0 +1,37 @@
+// Copyright (C) 2021 Microsoft. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.findlastindex
+description: >
+  Predicate is only called if this.length is > 0.
+info: |
+  Array.prototype.findLastIndex ( predicate[ , thisArg ] )
+
+  ...
+  4. Let k be len - 1.
+  5. Repeat, while k ≥ 0,
+    ...
+    c. Let testResult be ! ToBoolean(? Call(predicate, thisArg, « kValue, 𝔽(k), O »)).
+  6. Return -1.
+features: [array-find-from-last]
+---*/
+
+var called = false;
+
+var predicate = function() {
+  called = true;
+  return true;
+};
+
+var result = [].findLastIndex(predicate);
+
+assert.sameValue(
+  called, false,
+  '[].findLastIndex(predicate) does not call predicate'
+);
+assert.sameValue(
+  result, -1,
+  '[].findLastIndex(predicate) returned undefined'
+);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/findLastIndex/prop-desc.js b/js/src/tests/test262/built-ins/Array/prototype/findLastIndex/prop-desc.js
new file mode 100644
index 0000000000..6959d25183
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/findLastIndex/prop-desc.js
@@ -0,0 +1,24 @@
+// Copyright (C) 2021 Microsoft. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.findlastindex
+description: Property type and descriptor.
+info: |
+  17 ECMAScript Standard Built-in Objects
+includes: [propertyHelper.js]
+features: [array-find-from-last]
+---*/
+
+assert.sameValue(
+  typeof Array.prototype.findLastIndex,
+  'function',
+  '`typeof Array.prototype.findLastIndex` is `function`'
+);
+
+verifyProperty(Array.prototype, "findLastIndex", {
+  enumerable: false,
+  writable: true,
+  configurable: true
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/findLastIndex/return-abrupt-from-predicate-call.js b/js/src/tests/test262/built-ins/Array/prototype/findLastIndex/return-abrupt-from-predicate-call.js
new file mode 100644
index 0000000000..295cd21b8a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/findLastIndex/return-abrupt-from-predicate-call.js
@@ -0,0 +1,28 @@
+// Copyright (C) 2021 Microsoft. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.findlastindex
+description: >
+  Return abrupt from predicate call.
+info: |
+  Array.prototype.findLastIndex ( predicate[ , thisArg ] )
+
+  ...
+  4. Let k be len - 1.
+  5. Repeat, while k ≥ 0,
+    ...
+    c. Let testResult be ! ToBoolean(? Call(predicate, thisArg, « kValue, 𝔽(k), O »)).
+    d. If testResult is true, return 𝔽(k).
+  ...
+features: [array-find-from-last]
+---*/
+
+var predicate = function() {
+  throw new Test262Error();
+};
+
+assert.throws(Test262Error, function() {
+  [1].findLastIndex(predicate);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/findLastIndex/return-abrupt-from-property.js b/js/src/tests/test262/built-ins/Array/prototype/findLastIndex/return-abrupt-from-property.js
new file mode 100644
index 0000000000..e92c86e212
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/findLastIndex/return-abrupt-from-property.js
@@ -0,0 +1,33 @@
+// Copyright (C) 2021 Microsoft. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.findlastindex
+description: >
+  Returns abrupt from getting property value from `this`.
+info: |
+  Array.prototype.findLastIndex ( predicate[ , thisArg ] )
+
+  ...
+  4. Let k be len - 1.
+  5. Repeat, while k ≥ 0,
+    a. Let Pk be ! ToString(𝔽(k)).
+    b. Let kValue be ? Get(O, Pk).
+  ...
+features: [array-find-from-last]
+---*/
+
+var o = {
+  length: 1
+};
+
+Object.defineProperty(o, 0, {
+  get: function() {
+    throw new Test262Error();
+  }
+});
+
+assert.throws(Test262Error, function() {
+  [].findLastIndex.call(o, function() {});
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/findLastIndex/return-abrupt-from-this-length-as-symbol.js b/js/src/tests/test262/built-ins/Array/prototype/findLastIndex/return-abrupt-from-this-length-as-symbol.js
new file mode 100644
index 0000000000..f3b1275072
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/findLastIndex/return-abrupt-from-this-length-as-symbol.js
@@ -0,0 +1,25 @@
+// Copyright (C) 2021 Microsoft. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.findlastindex
+description: >
+  Return abrupt from ToLength(Get(O, "length")) where length is a Symbol.
+info: |
+  Array.prototype.findLastIndex ( predicate[ , thisArg ] )
+
+  1. Let O be ? ToObject(this value).
+  2. Let len be ? LengthOfArrayLike(O).
+  ...
+features: [Symbol, array-find-from-last]
+---*/
+
+var o = {};
+
+o.length = Symbol(1);
+
+// predicate fn is given to avoid false positives
+assert.throws(TypeError, function() {
+  [].findLastIndex.call(o, function() {});
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/findLastIndex/return-abrupt-from-this-length.js b/js/src/tests/test262/built-ins/Array/prototype/findLastIndex/return-abrupt-from-this-length.js
new file mode 100644
index 0000000000..d1e98dc134
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/findLastIndex/return-abrupt-from-this-length.js
@@ -0,0 +1,39 @@
+// Copyright (C) 2021 Microsoft. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.findlastindex
+description: >
+  Return abrupt from ToLength(Get(O, "length")).
+info: |
+  Array.prototype.findLastIndex ( predicate[ , thisArg ] )
+
+  1. Let O be ? ToObject(this value).
+  2. Let len be ? LengthOfArrayLike(O).
+features: [array-find-from-last]
+---*/
+
+var o1 = {};
+
+Object.defineProperty(o1, 'length', {
+  get: function() {
+    throw new Test262Error();
+  },
+  configurable: true
+});
+// predicate fn is given to avoid false positives
+assert.throws(Test262Error, function() {
+  [].findLastIndex.call(o1, function() {});
+});
+
+var o2 = {
+  length: {
+    valueOf: function() {
+      throw new Test262Error();
+    }
+  }
+};
+assert.throws(Test262Error, function() {
+  [].findLastIndex.call(o2, function() {});
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/findLastIndex/return-abrupt-from-this.js b/js/src/tests/test262/built-ins/Array/prototype/findLastIndex/return-abrupt-from-this.js
new file mode 100644
index 0000000000..6d756c040f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/findLastIndex/return-abrupt-from-this.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2021 Microsoft. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.findlastindex
+description: >
+  Return abrupt from ToObject(this value).
+info: |
+  Array.prototype.findLastIndex ( predicate[ , thisArg ] )
+
+  1. Let O be ? ToObject(this value).
+features: [array-find-from-last]
+---*/
+
+// predicate fn is given to avoid false positives
+assert.throws(TypeError, function() {
+  Array.prototype.findLastIndex.call(undefined, function() {});
+});
+
+assert.throws(TypeError, function() {
+  Array.prototype.findLastIndex.call(null, function() {});
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/findLastIndex/return-index-predicate-result-is-true.js b/js/src/tests/test262/built-ins/Array/prototype/findLastIndex/return-index-predicate-result-is-true.js
new file mode 100644
index 0000000000..9df93fb9e4
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/findLastIndex/return-index-predicate-result-is-true.js
@@ -0,0 +1,64 @@
+// Copyright (C) 2021 Microsoft. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.findlastindex
+description: >
+  Return index if predicate return a boolean true value.
+info: |
+  Array.prototype.findLastIndex ( predicate[ , thisArg ] )
+
+  ...
+  5. Repeat, while k ≥ 0,
+    ...
+    c. Let testResult be ! ToBoolean(? Call(predicate, thisArg, « kValue, 𝔽(k), O »)).
+    d. If testResult is true, return 𝔽(k).
+  ...
+features: [Symbol, array-find-from-last]
+---*/
+
+var arr = ['Shoes', 'Car', 'Bike'];
+var called = 0;
+
+var result = arr.findLastIndex(function() {
+  called++;
+  return true;
+});
+
+assert.sameValue(result, 2);
+assert.sameValue(called, 1, 'predicate was called once');
+
+called = 0;
+result = arr.findLastIndex(function(val) {
+  called++;
+  return val === 'Shoes';
+});
+
+assert.sameValue(called, 3, 'predicate was called three times');
+assert.sameValue(result, 0);
+
+result = arr.findLastIndex(function() {
+  return 'string';
+});
+assert.sameValue(result, 2, 'coerced string');
+
+result = arr.findLastIndex(function() {
+  return {};
+});
+assert.sameValue(result, 2, 'coerced object');
+
+result = arr.findLastIndex(function() {
+  return Symbol('');
+});
+assert.sameValue(result, 2, 'coerced Symbol');
+
+result = arr.findLastIndex(function() {
+  return 1;
+});
+assert.sameValue(result, 2, 'coerced number');
+
+result = arr.findLastIndex(function() {
+  return -1;
+});
+assert.sameValue(result, 2, 'coerced negative number');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/findLastIndex/return-negative-one-if-predicate-returns-false-value.js b/js/src/tests/test262/built-ins/Array/prototype/findLastIndex/return-negative-one-if-predicate-returns-false-value.js
new file mode 100644
index 0000000000..594091f81d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/findLastIndex/return-negative-one-if-predicate-returns-false-value.js
@@ -0,0 +1,55 @@
+// Copyright (C) 2021 Microsoft. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.findlastindex
+description: >
+  Return -1 if predicate always returns a boolean false value.
+info: |
+  Array.prototype.findLastIndex ( predicate[ , thisArg ] )
+
+  ...
+  5. Repeat, while k ≥ 0,
+    ...
+    c. Let testResult be ! ToBoolean(? Call(predicate, thisArg, « kValue, 𝔽(k), O »)).
+    ...
+  6. Return -1.
+features: [Symbol, array-find-from-last]
+---*/
+
+var arr = ['Shoes', 'Car', 'Bike'];
+var called = 0;
+
+var result = arr.findLastIndex(function() {
+  called++;
+  return false;
+});
+
+assert.sameValue(called, 3, 'predicate was called three times');
+assert.sameValue(result, -1);
+
+result = arr.findLastIndex(function() {
+  return '';
+});
+assert.sameValue(result, -1, 'coerced string');
+
+result = arr.findLastIndex(function() {
+  return undefined;
+});
+assert.sameValue(result, -1, 'coerced undefined');
+
+result = arr.findLastIndex(function() {
+  return null;
+});
+assert.sameValue(result, -1, 'coerced null');
+
+result = arr.findLastIndex(function() {
+  return 0;
+});
+assert.sameValue(result, -1, 'coerced 0');
+
+result = arr.findLastIndex(function() {
+  return NaN;
+});
+assert.sameValue(result, -1, 'coerced NaN');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/findLastIndex/shell.js b/js/src/tests/test262/built-ins/Array/prototype/findLastIndex/shell.js
new file mode 100644
index 0000000000..05fecd6ef1
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/findLastIndex/shell.js
@@ -0,0 +1,161 @@
+// GENERATED, DO NOT EDIT
+// file: testTypedArray.js
+// Copyright (C) 2015 André Bargull. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+description: |
+    Collection of functions used to assert the correctness of TypedArray objects.
+defines:
+  - floatArrayConstructors
+  - nonClampedIntArrayConstructors
+  - intArrayConstructors
+  - typedArrayConstructors
+  - TypedArray
+  - testWithTypedArrayConstructors
+  - nonAtomicsFriendlyTypedArrayConstructors
+  - testWithAtomicsFriendlyTypedArrayConstructors
+  - testWithNonAtomicsFriendlyTypedArrayConstructors
+  - testTypedArrayConversions
+---*/
+
+var floatArrayConstructors = [
+  Float64Array,
+  Float32Array
+];
+
+var nonClampedIntArrayConstructors = [
+  Int32Array,
+  Int16Array,
+  Int8Array,
+  Uint32Array,
+  Uint16Array,
+  Uint8Array
+];
+
+var intArrayConstructors = nonClampedIntArrayConstructors.concat([Uint8ClampedArray]);
+
+// Float16Array is a newer feature
+// adding it to this list unconditionally would cause implementations lacking it to fail every test which uses it
+if (typeof Float16Array !== 'undefined') {
+  floatArrayConstructors.push(Float16Array);
+}
+
+/**
+ * Array containing every non-bigint typed array constructor.
+ */
+
+var typedArrayConstructors = floatArrayConstructors.concat(intArrayConstructors);
+
+/**
+ * The %TypedArray% intrinsic constructor function.
+ */
+var TypedArray = Object.getPrototypeOf(Int8Array);
+
+/**
+ * Callback for testing a typed array constructor.
+ *
+ * @callback typedArrayConstructorCallback
+ * @param {Function} Constructor the constructor object to test with.
+ */
+
+/**
+ * Calls the provided function for every typed array constructor.
+ *
+ * @param {typedArrayConstructorCallback} f - the function to call for each typed array constructor.
+ * @param {Array} selected - An optional Array with filtered typed arrays
+ */
+function testWithTypedArrayConstructors(f, selected) {
+  var constructors = selected || typedArrayConstructors;
+  for (var i = 0; i < constructors.length; ++i) {
+    var constructor = constructors[i];
+    try {
+      f(constructor);
+    } catch (e) {
+      e.message += " (Testing with " + constructor.name + ".)";
+      throw e;
+    }
+  }
+}
+
+var nonAtomicsFriendlyTypedArrayConstructors = floatArrayConstructors.concat([Uint8ClampedArray]);
+/**
+ * Calls the provided function for every non-"Atomics Friendly" typed array constructor.
+ *
+ * @param {typedArrayConstructorCallback} f - the function to call for each typed array constructor.
+ * @param {Array} selected - An optional Array with filtered typed arrays
+ */
+function testWithNonAtomicsFriendlyTypedArrayConstructors(f) {
+  testWithTypedArrayConstructors(f, nonAtomicsFriendlyTypedArrayConstructors);
+}
+
+/**
+ * Calls the provided function for every "Atomics Friendly" typed array constructor.
+ *
+ * @param {typedArrayConstructorCallback} f - the function to call for each typed array constructor.
+ * @param {Array} selected - An optional Array with filtered typed arrays
+ */
+function testWithAtomicsFriendlyTypedArrayConstructors(f) {
+  testWithTypedArrayConstructors(f, [
+    Int32Array,
+    Int16Array,
+    Int8Array,
+    Uint32Array,
+    Uint16Array,
+    Uint8Array,
+  ]);
+}
+
+/**
+ * Helper for conversion operations on TypedArrays, the expected values
+ * properties are indexed in order to match the respective value for each
+ * TypedArray constructor
+ * @param  {Function} fn - the function to call for each constructor and value.
+ *                         will be called with the constructor, value, expected
+ *                         value, and a initial value that can be used to avoid
+ *                         a false positive with an equivalent expected value.
+ */
+function testTypedArrayConversions(byteConversionValues, fn) {
+  var values = byteConversionValues.values;
+  var expected = byteConversionValues.expected;
+
+  testWithTypedArrayConstructors(function(TA) {
+    var name = TA.name.slice(0, -5);
+
+    return values.forEach(function(value, index) {
+      var exp = expected[name][index];
+      var initial = 0;
+      if (exp === 0) {
+        initial = 1;
+      }
+      fn(TA, value, exp, initial);
+    });
+  });
+}
+
+/**
+ * Checks if the given argument is one of the float-based TypedArray constructors.
+ *
+ * @param {constructor} ctor - the value to check
+ * @returns {boolean}
+ */
+function isFloatTypedArrayConstructor(arg) {
+  return floatArrayConstructors.indexOf(arg) !== -1;
+}
+
+/**
+ * Determines the precision of the given float-based TypedArray constructor.
+ *
+ * @param {constructor} ctor - the value to check
+ * @returns {string} "half", "single", or "double" for Float16Array, Float32Array, and Float64Array respectively.
+ */
+function floatTypedArrayConstructorPrecision(FA) {
+  if (typeof Float16Array !== "undefined" && FA === Float16Array) {
+    return "half";
+  } else if (FA === Float32Array) {
+    return "single";
+  } else if (FA === Float64Array) {
+    return "double";
+  } else {
+    throw new Error("Malformed test - floatTypedArrayConstructorPrecision called with non-float TypedArray");
+  }
+}
diff --git a/js/src/tests/test262/built-ins/Array/prototype/flat/array-like-objects.js b/js/src/tests/test262/built-ins/Array/prototype/flat/array-like-objects.js
new file mode 100644
index 0000000000..e89bbd22b8
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/flat/array-like-objects.js
@@ -0,0 +1,33 @@
+// Copyright (C) 2018 Shilpi Jain and Michael Ficarra. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.flat
+description: >
+    array-like objects can be flattened
+includes: [compareArray.js]
+features: [Array.prototype.flat]
+---*/
+
+function getArgumentsObject() {
+  return arguments;
+}
+
+var a = getArgumentsObject([1], [2]);
+var actual = [].flat.call(a);
+assert.compareArray(actual, [1, 2], 'The value of actual is expected to be [1, 2]');
+
+a = {
+  length: 1,
+  0: [1],
+};
+actual = [].flat.call(a);
+assert.compareArray(actual, [1], 'The value of actual is expected to be [1]');
+
+a = {
+  length: undefined,
+  0: [1],
+};
+actual = [].flat.call(a);
+assert.compareArray(actual, [], 'The value of actual is expected to be []');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/flat/bound-function-call.js b/js/src/tests/test262/built-ins/Array/prototype/flat/bound-function-call.js
new file mode 100644
index 0000000000..374507b8f9
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/flat/bound-function-call.js
@@ -0,0 +1,19 @@
+// Copyright (C) 2018 Shilpi Jain and Michael Ficarra. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.flat
+description: >
+    using bound functions
+includes: [compareArray.js]
+features: [Array.prototype.flat]
+---*/
+
+var a = [
+  [0],
+  [1]
+];
+var actual = [].flat.bind(a)();
+
+assert.compareArray(actual, [0, 1], 'The value of actual is expected to be [0, 1]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/flat/browser.js b/js/src/tests/test262/built-ins/Array/prototype/flat/browser.js
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/js/src/tests/test262/built-ins/Array/prototype/flat/call-with-boolean.js b/js/src/tests/test262/built-ins/Array/prototype/flat/call-with-boolean.js
new file mode 100644
index 0000000000..e5edec6120
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/flat/call-with-boolean.js
@@ -0,0 +1,13 @@
+// Copyright (c) 2020 Rick Waldron.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.flat
+description: Array.prototype.flat applied to boolean primitive
+includes: [compareArray.js]
+---*/
+
+assert.compareArray(Array.prototype.flat.call(true), [], 'Array.prototype.flat.call(true) must return []');
+assert.compareArray(Array.prototype.flat.call(false), [], 'Array.prototype.flat.call(false) must return []');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/flat/empty-array-elements.js b/js/src/tests/test262/built-ins/Array/prototype/flat/empty-array-elements.js
new file mode 100644
index 0000000000..a8472974c3
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/flat/empty-array-elements.js
@@ -0,0 +1,26 @@
+// Copyright (C) 2018 Shilpi Jain and Michael Ficarra. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.flat
+description: >
+    arrays with empty arrays elements
+includes: [compareArray.js]
+features: [Array.prototype.flat]
+---*/
+
+var a = {};
+assert.compareArray([].flat(), [], '[].flat() must return []');
+assert.compareArray([
+  [],
+  []
+].flat(), [], '[ [], [] ].flat() must return []');
+assert.compareArray([
+  [],
+  [1]
+].flat(), [1], '[ [], [1] ].flat() must return [1]');
+assert.compareArray([
+  [],
+  [1, a]
+].flat(), [1, a], '[ [], [1, a] ].flat() must return [1, a]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/flat/empty-object-elements.js b/js/src/tests/test262/built-ins/Array/prototype/flat/empty-object-elements.js
new file mode 100644
index 0000000000..29b707fd1a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/flat/empty-object-elements.js
@@ -0,0 +1,24 @@
+// Copyright (C) 2018 Shilpi Jain and Michael Ficarra. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.flat
+description: >
+    arrays with empty object elements
+includes: [compareArray.js]
+features: [Array.prototype.flat]
+---*/
+
+var a = {},
+  b = {};
+
+assert.compareArray([a].flat(), [a], '[a].flat() must return [a]');
+assert.compareArray([a, [b]].flat(), [a, b], '[a, [b]].flat() must return [a, b]');
+assert.compareArray([
+  [a], b
+].flat(), [a, b], '[ [a], b ].flat() must return [a, b]');
+assert.compareArray([
+  [a],
+  [b]
+].flat(), [a, b], '[ [a], [b] ].flat() must return [a, b]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/flat/length.js b/js/src/tests/test262/built-ins/Array/prototype/flat/length.js
new file mode 100644
index 0000000000..0978244cc0
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/flat/length.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2018 Shilpi Jain and Michael Ficarra. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.flat
+description: Array.prototype.flat.length value and descriptor.
+info: >
+  17 ECMAScript Standard Built-in Objects
+includes: [propertyHelper.js]
+features: [Array.prototype.flat]
+---*/
+
+assert.sameValue(
+  Array.prototype.flat.length, 0,
+  'The value of `Array.prototype.flat.length` is `0`'
+);
+
+verifyProperty(Array.prototype.flat, 'length', {
+  enumerable: false,
+  writable: false,
+  configurable: true,
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/flat/name.js b/js/src/tests/test262/built-ins/Array/prototype/flat/name.js
new file mode 100644
index 0000000000..45af8402de
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/flat/name.js
@@ -0,0 +1,24 @@
+// Copyright (C) 2018 Shilpi Jain and Michael Ficarra. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.flat
+description: >
+  Array.prototype.flat.name value and descriptor.
+info: >
+  17 ECMAScript Standard Built-in Objects
+includes: [propertyHelper.js]
+features: [Array.prototype.flat]
+---*/
+
+assert.sameValue(
+  Array.prototype.flat.name, 'flat',
+  'The value of `Array.prototype.flat.name` is `"flat"`'
+);
+
+verifyProperty(Array.prototype.flat, 'name', {
+  enumerable: false,
+  writable: false,
+  configurable: true,
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/flat/non-numeric-depth-should-not-throw.js b/js/src/tests/test262/built-ins/Array/prototype/flat/non-numeric-depth-should-not-throw.js
new file mode 100644
index 0000000000..fb86d87595
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/flat/non-numeric-depth-should-not-throw.js
@@ -0,0 +1,45 @@
+// Copyright (C) 2018 Shilpi Jain and Michael Ficarra. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.flat
+description: >
+    if the argument is a string or object, the depthNum is 0
+includes: [compareArray.js]
+features: [Array.prototype.flat]
+---*/
+
+var a = [1, [2]];
+var expected = a;
+
+// non integral string depthNum is converted to 0
+var depthNum = 'TestString';
+var actual = a.flat(depthNum);
+assert.compareArray(actual, expected, 'The value of actual is expected to equal the value of expected');
+
+// object type depthNum is converted to 0
+depthNum = {};
+actual = a.flat(depthNum);
+assert.compareArray(actual, expected, 'The value of actual is expected to equal the value of expected');
+
+// negative infinity depthNum is converted to 0
+depthNum = Number.NEGATIVE_INFINITY;
+actual = a.flat(depthNum);
+assert.compareArray(actual, expected, 'The value of actual is expected to equal the value of expected');
+
+// positive zero depthNum is converted to 0
+depthNum = +0;
+actual = a.flat(depthNum);
+assert.compareArray(actual, expected, 'The value of actual is expected to equal the value of expected');
+
+// negative zero depthNum is converted to 0
+depthNum = -0;
+actual = a.flat(depthNum);
+assert.compareArray(actual, expected, 'The value of actual is expected to equal the value of expected');
+
+// integral string depthNum is converted to an integer
+depthNum = '1';
+actual = a.flat(depthNum);
+expected = [1, 2]
+assert.compareArray(actual, expected, 'The value of actual is expected to equal the value of expected');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/flat/non-object-ctor-throws.js b/js/src/tests/test262/built-ins/Array/prototype/flat/non-object-ctor-throws.js
new file mode 100644
index 0000000000..fe6886dcc1
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/flat/non-object-ctor-throws.js
@@ -0,0 +1,37 @@
+// Copyright (C) 2018 Shilpi Jain and Michael Ficarra. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.flat
+description: >
+    Behavior when `constructor` property is neither an Object nor undefined
+    - if IsConstructor(C) is false, throw a TypeError exception.
+features: [Array.prototype.flat]
+---*/
+
+assert.sameValue(typeof Array.prototype.flat, 'function');
+
+var a = [];
+a.constructor = null;
+assert.throws(TypeError, function() {
+  a.flat();
+}, 'null value');
+
+a = [];
+a.constructor = 1;
+assert.throws(TypeError, function() {
+  a.flat();
+}, 'number value');
+
+a = [];
+a.constructor = 'string';
+assert.throws(TypeError, function() {
+  a.flat();
+}, 'string value');
+
+a = [];
+a.constructor = true;
+assert.throws(TypeError, function() {
+  a.flat();
+}, 'boolean value');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/flat/not-a-constructor.js b/js/src/tests/test262/built-ins/Array/prototype/flat/not-a-constructor.js
new file mode 100644
index 0000000000..5f9c2c1401
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/flat/not-a-constructor.js
@@ -0,0 +1,31 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Array.prototype.flat does not implement [[Construct]], is not new-able
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+
+  sec-evaluatenew
+
+  ...
+  7. If IsConstructor(constructor) is false, throw a TypeError exception.
+  ...
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(isConstructor(Array.prototype.flat), false, 'isConstructor(Array.prototype.flat) must return false');
+
+assert.throws(TypeError, () => {
+  new Array.prototype.flat();
+}, '`new Array.prototype.flat()` throws TypeError');
+
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/flat/null-undefined-elements.js b/js/src/tests/test262/built-ins/Array/prototype/flat/null-undefined-elements.js
new file mode 100644
index 0000000000..8bbf6a4ffa
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/flat/null-undefined-elements.js
@@ -0,0 +1,34 @@
+// Copyright (C) 2018 Shilpi Jain and Michael Ficarra. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.flat
+description: >
+    arrays with null, and undefined
+includes: [compareArray.js]
+features: [Array.prototype.flat]
+---*/
+
+var a = [void 0];
+
+assert.compareArray(
+  [1, null, void 0].flat(),
+  [1, null, undefined],
+  '[1, null, void 0].flat() must return [1, null, undefined]'
+);
+assert.compareArray(
+  [1, [null, void 0]].flat(),
+  [1, null, undefined],
+  '[1, [null, void 0]].flat() must return [1, null, undefined]'
+);
+assert.compareArray([
+  [null, void 0],
+  [null, void 0]
+].flat(), [null, undefined, null, undefined], '[ [null, void 0], [null, void 0] ].flat() must return [null, undefined, null, undefined]');
+assert.compareArray([1, [null, a]].flat(1), [1, null, a], '[1, [null, a]].flat(1) must return [1, null, a]');
+assert.compareArray(
+  [1, [null, a]].flat(2),
+  [1, null, undefined],
+  '[1, [null, a]].flat(2) must return [1, null, undefined]'
+);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/flat/null-undefined-input-throws.js b/js/src/tests/test262/built-ins/Array/prototype/flat/null-undefined-input-throws.js
new file mode 100644
index 0000000000..aac2ff3346
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/flat/null-undefined-input-throws.js
@@ -0,0 +1,24 @@
+// Copyright (C) 2018 Shilpi Jain and Michael Ficarra. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.flat
+description: >
+    null or undefined should throw TypeError Exception
+features: [Array.prototype.flat]
+---*/
+
+assert.sameValue(typeof Array.prototype.flat, 'function');
+
+assert.throws(TypeError, function() {
+  [].flat.call(null);
+}, 'null value');
+
+assert.throws(TypeError, function() {
+  [].flat.call();
+}, 'missing');
+
+assert.throws(TypeError, function() {
+  [].flat.call(void 0);
+}, 'undefined');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/flat/positive-infinity.js b/js/src/tests/test262/built-ins/Array/prototype/flat/positive-infinity.js
new file mode 100644
index 0000000000..7725c595c1
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/flat/positive-infinity.js
@@ -0,0 +1,14 @@
+// Copyright (C) 2018 Shilpi Jain and Michael Ficarra. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.flat
+description: >
+    if the argument is a positive infinity, the depthNum is max depth of the array
+includes: [compareArray.js]
+features: [Array.prototype.flat]
+---*/
+
+var a = [1, [2, [3, [4]]]]
+assert.compareArray(a.flat(Number.POSITIVE_INFINITY), [1, 2, 3, 4], 'a.flat(Number.POSITIVE_INFINITY) must return [1, 2, 3, 4]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/flat/prop-desc.js b/js/src/tests/test262/built-ins/Array/prototype/flat/prop-desc.js
new file mode 100644
index 0000000000..b7eff99b5b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/flat/prop-desc.js
@@ -0,0 +1,24 @@
+// Copyright (C) 2018 Shilpi Jain and Michael Ficarra. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.flat
+description: Property type and descriptor.
+info: >
+  17 ECMAScript Standard Built-in Objects
+includes: [propertyHelper.js]
+features: [Array.prototype.flat]
+---*/
+
+assert.sameValue(
+  typeof Array.prototype.flat,
+  'function',
+  '`typeof Array.prototype.flat` is `function`'
+);
+
+verifyProperty(Array.prototype, 'flat', {
+  enumerable: false,
+  writable: true,
+  configurable: true,
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/flat/proxy-access-count.js b/js/src/tests/test262/built-ins/Array/prototype/flat/proxy-access-count.js
new file mode 100644
index 0000000000..3100f4ecc8
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/flat/proxy-access-count.js
@@ -0,0 +1,38 @@
+// Copyright (C) 2018 Richard Lawrence. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.flat
+description: >
+  properties are accessed correct number of times by .flat
+info: |
+  Array.prototype.flat( [ depth ] )
+
+  ...
+  6. Perform ? FlattenIntoArray(A, O, sourceLen, 0, depthNum).
+
+  FlattenIntoArray (target, source, sourceLen, start, depth [ , mapperFunction, thisArg ])
+
+  3. Repeat, while sourceIndex < sourceLen
+    a. Let P be ! ToString(sourceIndex).
+    b. Let exists be ? HasProperty(source, P).
+    c. If exists is true, then
+      i. Let element be ? Get(source, P).
+features: [Array.prototype.flat]
+includes: [compareArray.js]
+---*/
+
+const getCalls = [], hasCalls = [];
+const handler = {
+  get : function (t, p, r) { getCalls.push(p); return Reflect.get(t, p, r); },
+  has : function (t, p, r) { hasCalls.push(p); return Reflect.has(t, p, r); }
+}
+
+const tier2 = new Proxy([4, 3], handler);
+const tier1 = new Proxy([2, [3, [4, 2], 2], 5, tier2, 6], handler);
+
+Array.prototype.flat.call(tier1, 3);
+
+assert.compareArray(getCalls, ["length", "constructor", "0", "1", "2", "3", "length", "0", "1", "4"], 'The value of getCalls is expected to be ["length", "constructor", "0", "1", "2", "3", "length", "0", "1", "4"]');
+assert.compareArray(hasCalls, ["0", "1", "2", "3", "0", "1", "4"], 'The value of hasCalls is expected to be ["0", "1", "2", "3", "0", "1", "4"]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/flat/shell.js b/js/src/tests/test262/built-ins/Array/prototype/flat/shell.js
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/js/src/tests/test262/built-ins/Array/prototype/flat/symbol-object-create-null-depth-throws.js b/js/src/tests/test262/built-ins/Array/prototype/flat/symbol-object-create-null-depth-throws.js
new file mode 100644
index 0000000000..a84a154d6a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/flat/symbol-object-create-null-depth-throws.js
@@ -0,0 +1,20 @@
+// Copyright (C) 2018 Shilpi Jain and Michael Ficarra. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.flat
+description: >
+    if the argument is a Symbol or Object null, it throws exception
+features: [Array.prototype.flat]
+---*/
+
+assert.sameValue(typeof Array.prototype.flat, 'function');
+
+assert.throws(TypeError, function() {
+  [].flat(Symbol());
+}, 'symbol value');
+
+assert.throws(TypeError, function() {
+  [].flat(Object.create(null));
+}, 'object create null');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/flat/target-array-non-extensible.js b/js/src/tests/test262/built-ins/Array/prototype/flat/target-array-non-extensible.js
new file mode 100644
index 0000000000..2ac7bf6c1c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/flat/target-array-non-extensible.js
@@ -0,0 +1,50 @@
+// Copyright (C) 2020 Alexey Shvayka. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.flat
+description: >
+  TypeError is thrown if CreateDataProperty fails.
+  (result object is non-extensible, source array is not flattened)
+info: |
+  Array.prototype.flat ( [ depth ] )
+
+  [...]
+  6. Perform ? FlattenIntoArray(A, O, sourceLen, 0, depthNum).
+
+  FlattenIntoArray ( target, source, sourceLen, start, depth [ , mapperFunction, thisArg ] )
+
+  [...]
+  9. Repeat, while sourceIndex < sourceLen
+    [...]
+    c. If exists is true, then
+      [...]
+      v. If shouldFlatten is true, then
+        [...]
+      vi. Else,
+        [...]
+        2. Perform ? CreateDataPropertyOrThrow(target, ! ToString(targetIndex), element).
+      [...]
+
+  CreateDataPropertyOrThrow ( O, P, V )
+
+  [...]
+  3. Let success be ? CreateDataProperty(O, P, V).
+  4. If success is false, throw a TypeError exception.
+features: [Symbol.species]
+---*/
+
+var A = function(_length) {
+  this.length = 0;
+  Object.preventExtensions(this);
+};
+
+var arr = [1];
+arr.constructor = {};
+arr.constructor[Symbol.species] = A;
+
+assert.throws(TypeError, function() {
+  arr.flat(1);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/flat/target-array-with-non-configurable-property.js b/js/src/tests/test262/built-ins/Array/prototype/flat/target-array-with-non-configurable-property.js
new file mode 100644
index 0000000000..c5eef83725
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/flat/target-array-with-non-configurable-property.js
@@ -0,0 +1,50 @@
+// Copyright (C) 2020 Alexey Shvayka. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.flat
+description: >
+  TypeError is thrown if CreateDataProperty fails.
+  (result object's "0" is non-configurable, source array gets flattened)
+info: |
+  Array.prototype.flat ( [ depth ] )
+
+  [...]
+  6. Perform ? FlattenIntoArray(A, O, sourceLen, 0, depthNum).
+
+  FlattenIntoArray ( target, source, sourceLen, start, depth [ , mapperFunction, thisArg ] )
+
+  [...]
+  9. Repeat, while sourceIndex < sourceLen
+    [...]
+    c. If exists is true, then
+      [...]
+      v. If shouldFlatten is true, then
+        [...]
+        2. Set targetIndex to ? FlattenIntoArray(target, element, elementLen, targetIndex, depth - 1).
+      [...]
+
+  CreateDataPropertyOrThrow ( O, P, V )
+
+  [...]
+  3. Let success be ? CreateDataProperty(O, P, V).
+  4. If success is false, throw a TypeError exception.
+features: [Symbol.species]
+---*/
+
+var A = function(_length) {
+  Object.defineProperty(this, "0", {
+    set: function(_value) {},
+    configurable: false,
+  });
+};
+
+var arr = [[1]];
+arr.constructor = {};
+arr.constructor[Symbol.species] = A;
+
+assert.throws(TypeError, function() {
+  arr.flat(1);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/flat/target-array-with-non-writable-property.js b/js/src/tests/test262/built-ins/Array/prototype/flat/target-array-with-non-writable-property.js
new file mode 100644
index 0000000000..4294babb48
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/flat/target-array-with-non-writable-property.js
@@ -0,0 +1,52 @@
+// Copyright (C) 2020 Alexey Shvayka. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.flat
+description: >
+  Non-writable properties are overwritten by CreateDataProperty.
+  (result object's "0" is non-writable, source array gets flattened)
+info: |
+  Array.prototype.flat ( [ depth ] )
+
+  [...]
+  6. Perform ? FlattenIntoArray(A, O, sourceLen, 0, depthNum).
+
+  FlattenIntoArray ( target, source, sourceLen, start, depth [ , mapperFunction, thisArg ] )
+
+  [...]
+  9. Repeat, while sourceIndex < sourceLen
+    [...]
+    c. If exists is true, then
+      [...]
+      v. If shouldFlatten is true, then
+        [...]
+        2. Set targetIndex to ? FlattenIntoArray(target, element, elementLen, targetIndex, depth - 1).
+      [...]
+features: [Symbol.species]
+includes: [propertyHelper.js]
+---*/
+
+var A = function(_length) {
+  Object.defineProperty(this, "0", {
+    value: 1,
+    writable: false,
+    enumerable: false,
+    configurable: true,
+  });
+};
+
+var arr = [[2]];
+arr.constructor = {};
+arr.constructor[Symbol.species] = A;
+
+var res = arr.flat(1);
+
+verifyProperty(res, "0", {
+  value: 2,
+  writable: true,
+  enumerable: true,
+  configurable: true,
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/flatMap/array-like-objects-nested.js b/js/src/tests/test262/built-ins/Array/prototype/flatMap/array-like-objects-nested.js
new file mode 100644
index 0000000000..58152e6c67
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/flatMap/array-like-objects-nested.js
@@ -0,0 +1,74 @@
+// Copyright (C) 2018 Leo Balter. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.flatMap
+description: >
+  Does not flatten array-like objects nested into the main array
+info: |
+  FlattenIntoArray(target, source, sourceLen, start, depth [ , mapperFunction, thisArg ])
+
+  1. Let targetIndex be start.
+  2. Let sourceIndex be 0.
+  3. Repeat, while sourceIndex < sourceLen
+    a. Let P be ! ToString(sourceIndex).
+    b. Let exists be ? HasProperty(source, P).
+    c. If exists is true, then
+      i. Let element be ? Get(source, P).
+      ii. If mapperFunction is present, then
+        1. Assert: thisArg is present.
+        2. Set element to ? Call(mapperFunction, thisArg , « element, sourceIndex, source »).
+      iii. Let shouldFlatten be false.
+      iv. If depth > 0, then
+        1. Set shouldFlatten to ? IsArray(element).
+      v. If shouldFlatten is true, then
+        1. Let elementLen be ? ToLength(? Get(element, "length")).
+        2. Set targetIndex to ? FlattenIntoArray(target, element, elementLen, targetIndex, depth - 1).
+      vi. Else,
+        1. If targetIndex ≥ 253-1, throw a TypeError exception.
+        2. Perform ? CreateDataPropertyOrThrow(target, ! ToString(targetIndex), element).
+        3. Increase targetIndex by 1.
+includes: [compareArray.js]
+features: [Array.prototype.flatMap, Int32Array]
+---*/
+
+function fn(e) {
+  return e;
+}
+
+var obj1 = {
+  length: 1,
+  0: 'a',
+  toString() { return 'obj1'; }
+};
+
+var obj2 = new Int32Array(2);
+
+var obj3 = {
+  get length() { throw "should not even consider the length property" },
+  toString() { return 'obj3'; }
+};
+
+var arr = [obj1, obj2, obj3];
+var actual = arr.flatMap(fn);
+assert.compareArray(actual, arr, 'The value of actual is expected to equal the value of arr');
+assert.notSameValue(actual, arr, 'The value of actual is expected to not equal the value of `arr`');
+
+var arrLike = {
+  length: 4,
+  0: obj1,
+  1: obj2,
+  2: obj3,
+  get 3() { return arrLike },
+  toString() { return 'obj4'; }
+};
+
+actual = [].flatMap.call(arrLike, fn);
+assert.compareArray(actual, [obj1, obj2, obj3, arrLike], 'The value of actual is expected to be [obj1, obj2, obj3, arrLike]');
+assert.notSameValue(actual, arrLike, 'The value of actual is expected to not equal the value of `arrLike`');
+assert.sameValue(
+  Object.getPrototypeOf(actual),
+  Array.prototype,
+  'Object.getPrototypeOf([].flatMap.call(arrLike, fn)") returns Array.prototype'
+);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/flatMap/array-like-objects-poisoned-length.js b/js/src/tests/test262/built-ins/Array/prototype/flatMap/array-like-objects-poisoned-length.js
new file mode 100644
index 0000000000..b7a8d20ef4
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/flatMap/array-like-objects-poisoned-length.js
@@ -0,0 +1,62 @@
+// Copyright (C) 2018 Leo Balter. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.flatMap
+description: >
+  Observe abrupt completion in poisoned lengths of array-like objects
+info: |
+  Array.prototype.flatMap ( mapperFunction [ , thisArg ] )
+
+  1. Let O be ? ToObject(this value).
+  2. Let sourceLen be ? ToLength(? Get(O, "length")).
+features: [Array.prototype.flatMap, Symbol.toPrimitive]
+---*/
+
+assert.sameValue(typeof Array.prototype.flatMap, 'function');
+
+function fn(e) {
+  return e;
+}
+
+var arr = {
+  length: Symbol(),
+};
+assert.throws(TypeError, function() {
+  [].flatMap.call(arr, fn);
+}, 'length is a symbol');
+
+arr = {
+  get length() { throw new Test262Error() }
+};
+assert.throws(Test262Error, function() {
+  [].flatMap.call(arr, fn);
+}, 'custom get error');
+
+arr = {
+  length: {
+    valueOf() { throw new Test262Error() }
+  }
+};
+assert.throws(Test262Error, function() {
+  [].flatMap.call(arr, fn);
+}, 'custom valueOf error');
+
+arr = {
+  length: {
+    toString() { throw new Test262Error() }
+  }
+};
+assert.throws(Test262Error, function() {
+  [].flatMap.call(arr, fn);
+}, 'custom toString error');
+
+arr = {
+  length: {
+    [Symbol.toPrimitive]() { throw new Test262Error() }
+  }
+};
+assert.throws(Test262Error, function() {
+  [].flatMap.call(arr, fn);
+}, 'custom Symbol.toPrimitive error');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/flatMap/array-like-objects-typedarrays.js b/js/src/tests/test262/built-ins/Array/prototype/flatMap/array-like-objects-typedarrays.js
new file mode 100644
index 0000000000..6215e4d2d9
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/flatMap/array-like-objects-typedarrays.js
@@ -0,0 +1,52 @@
+// Copyright (C) 2018 Leo Balter. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.flatMap
+description: >
+  array-like objects can be flattened (typedArrays)
+info: |
+  Array.prototype.flatMap ( mapperFunction [ , thisArg ] )
+
+  1. Let O be ? ToObject(this value).
+  2. Let sourceLen be ? ToLength(? Get(O, "length")).
+  ...
+  5. Let A be ? ArraySpeciesCreate(O, 0).
+  ...
+
+  ArraySpeciesCreate ( originalArray, length )
+
+  3. Let isArray be ? IsArray(originalArray).
+  4. If isArray is false, return ? ArrayCreate(length).
+  5. Let C be ? Get(originalArray, "constructor").
+includes: [compareArray.js]
+features: [Array.prototype.flatMap, Int32Array]
+---*/
+
+function same(e) {
+  return e;
+}
+
+var ta;
+var actual;
+
+ta = new Int32Array([1, 0, 42]);
+
+Object.defineProperty(ta, 'constructor', {
+  get() { throw "it should not object the typedarray ctor"; }
+});
+actual = [].flatMap.call(ta, same);
+assert.compareArray(actual, [1, 0, 42], 'The value of actual is expected to be [1, 0, 42]');
+assert.sameValue(Object.getPrototypeOf(actual), Array.prototype, 'Object.getPrototypeOf([].flatMap.call(ta, same)") returns Array.prototype');
+assert.sameValue(actual instanceof Int32Array, false, 'The result of evaluating (actual instanceof Int32Array) is expected to be false');
+
+ta = new Int32Array(0);
+
+Object.defineProperty(ta, 'constructor', {
+  get() { throw "it should not object the typedarray ctor"; }
+});
+actual = [].flatMap.call(ta, same);
+assert.compareArray(actual, [], 'The value of actual is expected to be []');
+assert.sameValue(Object.getPrototypeOf(actual), Array.prototype, 'Object.getPrototypeOf([].flatMap.call(ta, same)") returns Array.prototype');
+assert.sameValue(actual instanceof Int32Array, false, 'The result of evaluating (actual instanceof Int32Array) is expected to be false');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/flatMap/array-like-objects.js b/js/src/tests/test262/built-ins/Array/prototype/flatMap/array-like-objects.js
new file mode 100644
index 0000000000..6c5fa28717
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/flatMap/array-like-objects.js
@@ -0,0 +1,87 @@
+// Copyright (C) 2018 Shilpi Jain and Michael Ficarra. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.flatMap
+description: >
+  array-like objects can be flattened
+info: |
+  Array.prototype.flatMap ( mapperFunction [ , thisArg ] )
+
+  1. Let O be ? ToObject(this value).
+  2. Let sourceLen be ? ToLength(? Get(O, "length")).
+  ...
+  5. Let A be ? ArraySpeciesCreate(O, 0).
+  ...
+
+  ArraySpeciesCreate ( originalArray, length )
+
+  3. Let isArray be ? IsArray(originalArray).
+  4. If isArray is false, return ? ArrayCreate(length).
+
+  FlattenIntoArray(target, source, sourceLen, start, depth [ , mapperFunction, thisArg ])
+
+  1. Let targetIndex be start.
+  2. Let sourceIndex be 0.
+  3. Repeat, while sourceIndex < sourceLen
+    a. Let P be ! ToString(sourceIndex).
+    b. Let exists be ? HasProperty(source, P).
+    c. If exists is true, then
+      ...
+    ** Skip if property does not exist **
+includes: [compareArray.js]
+features: [Array.prototype.flatMap]
+---*/
+
+function fn(e) {
+  return [39, e * 2]; // returns an array to observe it being flattened after
+}
+
+var a;
+var actual;
+
+a = {
+  length: 3,
+  0: 1,
+  // property 1 will be fully skipped
+  2: 21,
+  get 3() { throw 'it should not get this property'; }
+};
+actual = [].flatMap.call(a, fn);
+assert.compareArray(actual, [39, 2, 39, 42], 'The value of actual is expected to be [39, 2, 39, 42]');
+assert.sameValue(Object.getPrototypeOf(actual), Array.prototype, 'Object.getPrototypeOf([].flatMap.call(a, fn)") returns Array.prototype');
+
+a = {
+  length: undefined,
+  get 0() { throw 'it should not get this property'; },
+};
+actual = [].flatMap.call(a, fn);
+assert.compareArray(actual, [], 'The value of actual is expected to be []');
+assert.sameValue(Object.getPrototypeOf(actual), Array.prototype, 'Object.getPrototypeOf([].flatMap.call(a, fn)") returns Array.prototype');
+
+var called = false;
+a = {
+  get length() {
+    if (!called) {
+      called = true;
+      return 2;
+    } else {
+      throw 'is should get the length only once';
+    }
+  },
+  0: 21,
+  1: 19.5,
+  get 2() { throw 'it should not get this property'; },
+};
+actual = [].flatMap.call(a, fn);
+assert.compareArray(actual, [39, 42, 39, 39], 'The value of actual is expected to be [39, 42, 39, 39]');
+assert.sameValue(Object.getPrototypeOf(actual), Array.prototype, 'Object.getPrototypeOf([].flatMap.call(a, fn)") returns Array.prototype');
+
+a = {
+  length: 10001,
+  [10000]: 7,
+};
+actual = [].flatMap.call(a, fn);
+assert.compareArray(actual, [39, 14], 'The value of actual is expected to be [39, 14]');
+assert.sameValue(Object.getPrototypeOf(actual), Array.prototype, 'Object.getPrototypeOf([].flatMap.call(a, fn)") returns Array.prototype');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/flatMap/bound-function-argument.js b/js/src/tests/test262/built-ins/Array/prototype/flatMap/bound-function-argument.js
new file mode 100644
index 0000000000..e9d9dfb39e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/flatMap/bound-function-argument.js
@@ -0,0 +1,16 @@
+// Copyright (C) 2018 Shilpi Jain and Michael Ficarra. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.flatMap
+description: >
+    Behavior when given a bound function
+includes: [compareArray.js]
+features: [Array.prototype.flatMap]
+---*/
+
+var a = [0, 0];
+assert.compareArray(a.flatMap(function() {
+  return this;
+}.bind([1, 2])), [1, 2, 1, 2], 'a.flatMap(function() {return this;}.bind([1, 2])) must return [1, 2, 1, 2]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/flatMap/browser.js b/js/src/tests/test262/built-ins/Array/prototype/flatMap/browser.js
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/js/src/tests/test262/built-ins/Array/prototype/flatMap/call-with-boolean.js b/js/src/tests/test262/built-ins/Array/prototype/flatMap/call-with-boolean.js
new file mode 100644
index 0000000000..8ebd2c8e20
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/flatMap/call-with-boolean.js
@@ -0,0 +1,21 @@
+// Copyright (c) 2020 Rick Waldron.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.flatMap
+description: Array.prototype.flatMap applied to boolean primitive
+includes: [compareArray.js]
+---*/
+
+assert.compareArray(
+  Array.prototype.flatMap.call(true, () => {}),
+  [],
+  'Array.prototype.flatMap.call(true, () => {}) must return []'
+);
+assert.compareArray(
+  Array.prototype.flatMap.call(false, () => {}),
+  [],
+  'Array.prototype.flatMap.call(false, () => {}) must return []'
+);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/flatMap/depth-always-one.js b/js/src/tests/test262/built-ins/Array/prototype/flatMap/depth-always-one.js
new file mode 100644
index 0000000000..b61c26bae4
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/flatMap/depth-always-one.js
@@ -0,0 +1,25 @@
+// Copyright (C) 2018 Shilpi Jain and Michael Ficarra. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.flatMap
+description: >
+    Behavior when array is depth more than 1
+includes: [compareArray.js]
+features: [Array.prototype.flatMap]
+---*/
+
+assert.compareArray([1, 2].flatMap(function(e) {
+  return [e, e * 2];
+}), [1, 2, 2, 4], '[1, 2].flatMap(function(e) {return [e, e * 2];}) must return [1, 2, 2, 4]');
+
+var result = [1, 2, 3].flatMap(function(ele) {
+  return [
+    [ele * 2]
+  ];
+});
+assert.sameValue(result.length, 3, 'The value of result.length is expected to be 3');
+assert.compareArray(result[0], [2], 'The value of result[0] is expected to be [2]');
+assert.compareArray(result[1], [4], 'The value of result[1] is expected to be [4]');
+assert.compareArray(result[2], [6], 'The value of result[2] is expected to be [6]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/flatMap/length.js b/js/src/tests/test262/built-ins/Array/prototype/flatMap/length.js
new file mode 100644
index 0000000000..c0767be8cc
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/flatMap/length.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2018 Shilpi Jain and Michael Ficarra. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.flatMap
+description: Array.prototype.flatMap.length value and descriptor.
+info: >
+  17 ECMAScript Standard Built-in Objects
+includes: [propertyHelper.js]
+features: [Array.prototype.flatMap]
+---*/
+
+assert.sameValue(
+  Array.prototype.flatMap.length, 1,
+  'The value of `Array.prototype.flatmap.length` is `1`'
+);
+
+verifyProperty(Array.prototype.flatMap, 'length', {
+  enumerable: false,
+  writable: false,
+  configurable: true,
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/flatMap/name.js b/js/src/tests/test262/built-ins/Array/prototype/flatMap/name.js
new file mode 100644
index 0000000000..991c171e78
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/flatMap/name.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2018 Shilpi Jain and Michael Ficarra. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.flatmap
+description: Array.prototype.flatmap name value and descriptor.
+info: >
+  17 ECMAScript Standard Built-in Objects
+includes: [propertyHelper.js]
+features: [Array.prototype.flatMap]
+---*/
+
+assert.sameValue(
+  Array.prototype.flatMap.name, 'flatMap',
+  'The value of `Array.prototype.flatMap.name` is `"flatMap"`'
+);
+
+verifyProperty(Array.prototype.flatMap, 'name', {
+  enumerable: false,
+  writable: false,
+  configurable: true,
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/flatMap/non-callable-argument-throws.js b/js/src/tests/test262/built-ins/Array/prototype/flatMap/non-callable-argument-throws.js
new file mode 100644
index 0000000000..99fa7e30eb
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/flatMap/non-callable-argument-throws.js
@@ -0,0 +1,52 @@
+// Copyright (C) 2018 Shilpi Jain and Michael Ficarra. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.flatMap
+description: >
+  non callable argument should throw TypeError Exception
+info: |
+  Array.prototype.flatMap ( mapperFunction [ , thisArg ] )
+
+  1. Let O be ? ToObject(this value).
+  2. Let sourceLen be ? ToLength(? Get(O, "length")).
+  3. If IsCallable(mapperFunction) is false, throw a TypeError exception.
+  ...
+features: [Array.prototype.flatMap, Symbol]
+---*/
+
+assert.sameValue(typeof Array.prototype.flatMap, "function");
+
+assert.throws(TypeError, function() {
+  [].flatMap({});
+}, 'non callable argument, object');
+
+assert.throws(TypeError, function() {
+  [].flatMap(0);
+}, 'non callable argument, number');
+
+assert.throws(TypeError, function() {
+  [].flatMap();
+}, 'non callable argument, implict undefined');
+
+assert.throws(TypeError, function() {
+  [].flatMap(undefined);
+}, 'non callable argument, undefined');
+
+assert.throws(TypeError, function() {
+  [].flatMap(null);
+}, 'non callable argument, null');
+
+assert.throws(TypeError, function() {
+  [].flatMap(false);
+}, 'non callable argument, boolean');
+
+assert.throws(TypeError, function() {
+  [].flatMap('');
+}, 'non callable argument, string');
+
+var s = Symbol();
+assert.throws(TypeError, function() {
+  [].flatMap(s);
+}, 'non callable argument, symbol');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/flatMap/not-a-constructor.js b/js/src/tests/test262/built-ins/Array/prototype/flatMap/not-a-constructor.js
new file mode 100644
index 0000000000..8facbadc1c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/flatMap/not-a-constructor.js
@@ -0,0 +1,35 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Array.prototype.flatMap does not implement [[Construct]], is not new-able
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+
+  sec-evaluatenew
+
+  ...
+  7. If IsConstructor(constructor) is false, throw a TypeError exception.
+  ...
+includes: [isConstructor.js]
+features: [Reflect.construct, Array.prototype.flatMap, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Array.prototype.flatMap),
+  false,
+  'isConstructor(Array.prototype.flatMap) must return false'
+);
+
+assert.throws(TypeError, () => {
+  new Array.prototype.flatMap(() => {});
+}, '`new Array.prototype.flatMap(() => {})` throws TypeError');
+
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/flatMap/prop-desc.js b/js/src/tests/test262/built-ins/Array/prototype/flatMap/prop-desc.js
new file mode 100644
index 0000000000..59e449ee48
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/flatMap/prop-desc.js
@@ -0,0 +1,29 @@
+// Copyright (C) 2018 Leo Balter. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.flatMap
+description: Property type and descriptor.
+info: >
+  17 ECMAScript Standard Built-in Objects
+
+  Every other data property described in clauses 18 through 26 and in Annex B.2
+  has the attributes { [[Writable]]: true, [[Enumerable]]: false,
+  [[Configurable]]: true } unless otherwise specified.
+includes: [propertyHelper.js]
+features: [Array.prototype.flatMap]
+---*/
+
+assert.sameValue(
+  typeof Array.prototype.flatMap,
+  'function',
+  '`typeof Array.prototype.flatMap` is `function`'
+);
+
+verifyProperty(Array.prototype, 'flatMap', {
+  enumerable: false,
+  writable: true,
+  configurable: true,
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/flatMap/proxy-access-count.js b/js/src/tests/test262/built-ins/Array/prototype/flatMap/proxy-access-count.js
new file mode 100644
index 0000000000..e1693d4ea8
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/flatMap/proxy-access-count.js
@@ -0,0 +1,44 @@
+// Copyright (C) 2018 Richard Lawrence. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.flatMap
+description: >
+  properties are accessed correct number of times by .flatMap
+info: |
+  Array.prototype.flatMap ( mapperFunction [ , thisArg ] )
+
+  ...
+  6. Perform ? FlattenIntoArray(A, O, sourceLen, 0, 1, mapperFunction, T).
+
+  FlattenIntoArray (target, source, sourceLen, start, depth [ , mapperFunction, thisArg ])
+
+  3. Repeat, while sourceIndex < sourceLen
+    a. Let P be ! ToString(sourceIndex).
+    b. Let exists be ? HasProperty(source, P).
+    c. If exists is true, then
+      i. Let element be ? Get(source, P).
+features: [Array.prototype.flatMap]
+includes: [compareArray.js]
+---*/
+
+assert.sameValue(
+  typeof Array.prototype.flatMap,
+  'function',
+  'The value of `typeof Array.prototype.flatMap` is expected to be "function"'
+);
+
+const getCalls = [], hasCalls = [];
+const handler = {
+  get : function (t, p, r) { getCalls.push(p); return Reflect.get(t, p, r); },
+  has : function (t, p, r) { hasCalls.push(p); return Reflect.has(t, p, r); }
+}
+
+const tier2 = new Proxy([4, 3], handler);
+const tier1 = new Proxy([2, [3, 4, 2, 2], 5, tier2, 6], handler);
+
+Array.prototype.flatMap.call(tier1, function(a){ return a; });
+
+assert.compareArray(getCalls, ["length", "constructor", "0", "1", "2", "3", "length", "0", "1", "4"], 'The value of getCalls is expected to be ["length", "constructor", "0", "1", "2", "3", "length", "0", "1", "4"]');
+assert.compareArray(hasCalls, ["0", "1", "2", "3", "0", "1", "4"], 'The value of hasCalls is expected to be ["0", "1", "2", "3", "0", "1", "4"]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/flatMap/shell.js b/js/src/tests/test262/built-ins/Array/prototype/flatMap/shell.js
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/js/src/tests/test262/built-ins/Array/prototype/flatMap/target-array-non-extensible.js b/js/src/tests/test262/built-ins/Array/prototype/flatMap/target-array-non-extensible.js
new file mode 100644
index 0000000000..b5b17dfe6f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/flatMap/target-array-non-extensible.js
@@ -0,0 +1,50 @@
+// Copyright (C) 2020 Alexey Shvayka. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.flatmap
+description: >
+  TypeError is thrown if CreateDataProperty fails.
+  (result object is non-extensible, source array gets flattened)
+info: |
+  Array.prototype.flatMap ( mapperFunction [ , thisArg ] )
+
+  [...]
+  6. Perform ? FlattenIntoArray(A, O, sourceLen, 0, depthNum).
+
+  FlattenIntoArray ( target, source, sourceLen, start, depth [ , mapperFunction, thisArg ] )
+
+  [...]
+  9. Repeat, while sourceIndex < sourceLen
+    [...]
+    c. If exists is true, then
+      [...]
+      v. If shouldFlatten is true, then
+        [...]
+        2. Set targetIndex to ? FlattenIntoArray(target, element, elementLen, targetIndex, depth - 1).
+      [...]
+
+  CreateDataPropertyOrThrow ( O, P, V )
+
+  [...]
+  3. Let success be ? CreateDataProperty(O, P, V).
+  4. If success is false, throw a TypeError exception.
+features: [Symbol.species]
+---*/
+
+var A = function(_length) {
+  this.length = 0;
+  Object.preventExtensions(this);
+};
+
+var arr = [[1]];
+arr.constructor = {};
+arr.constructor[Symbol.species] = A;
+
+assert.throws(TypeError, function() {
+  arr.flatMap(function(item) {
+    return item;
+  });
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/flatMap/target-array-with-non-configurable-property.js b/js/src/tests/test262/built-ins/Array/prototype/flatMap/target-array-with-non-configurable-property.js
new file mode 100644
index 0000000000..4df2aacac0
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/flatMap/target-array-with-non-configurable-property.js
@@ -0,0 +1,54 @@
+// Copyright (C) 2020 Alexey Shvayka. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.flatmap
+description: >
+  TypeError is thrown if CreateDataProperty fails.
+  (result object's "0" is non-configurable, source array is not flattened)
+info: |
+  Array.prototype.flatMap ( mapperFunction [ , thisArg ] )
+
+  [...]
+  6. Perform ? FlattenIntoArray(A, O, sourceLen, 0, depthNum).
+
+  FlattenIntoArray ( target, source, sourceLen, start, depth [ , mapperFunction, thisArg ] )
+
+  [...]
+  9. Repeat, while sourceIndex < sourceLen
+    [...]
+    c. If exists is true, then
+      [...]
+      v. If shouldFlatten is true, then
+        [...]
+      vi. Else,
+        [...]
+        2. Perform ? CreateDataPropertyOrThrow(target, ! ToString(targetIndex), element).
+      [...]
+
+  CreateDataPropertyOrThrow ( O, P, V )
+
+  [...]
+  3. Let success be ? CreateDataProperty(O, P, V).
+  4. If success is false, throw a TypeError exception.
+features: [Symbol.species]
+---*/
+
+var A = function(_length) {
+  Object.defineProperty(this, "0", {
+    writable: true,
+    configurable: false,
+  });
+};
+
+var arr = [1];
+arr.constructor = {};
+arr.constructor[Symbol.species] = A;
+
+assert.throws(TypeError, function() {
+  arr.flatMap(function(item) {
+    return item;
+  });
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/flatMap/target-array-with-non-writable-property.js b/js/src/tests/test262/built-ins/Array/prototype/flatMap/target-array-with-non-writable-property.js
new file mode 100644
index 0000000000..1ed7aef093
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/flatMap/target-array-with-non-writable-property.js
@@ -0,0 +1,56 @@
+// Copyright (C) 2020 Alexey Shvayka. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.flatmap
+description: >
+  Non-writable properties are overwritten by CreateDataProperty.
+  (result object's "0" is non-writable, source array is not flattened)
+info: |
+  Array.prototype.flatMap ( mapperFunction [ , thisArg ] )
+
+  [...]
+  6. Perform ? FlattenIntoArray(A, O, sourceLen, 0, depthNum).
+
+  FlattenIntoArray ( target, source, sourceLen, start, depth [ , mapperFunction, thisArg ] )
+
+  [...]
+  9. Repeat, while sourceIndex < sourceLen
+    [...]
+    c. If exists is true, then
+      [...]
+      v. If shouldFlatten is true, then
+        [...]
+      vi. Else,
+        [...]
+        2. Perform ? CreateDataPropertyOrThrow(target, ! ToString(targetIndex), element).
+      [...]
+features: [Symbol.species]
+includes: [propertyHelper.js]
+---*/
+
+var A = function(_length) {
+  Object.defineProperty(this, "0", {
+    value: 1,
+    writable: false,
+    enumerable: false,
+    configurable: true,
+  });
+};
+
+var arr = [2];
+arr.constructor = {};
+arr.constructor[Symbol.species] = A;
+
+var res = arr.flatMap(function(item) {
+  return item;
+});
+
+verifyProperty(res, "0", {
+  value: 2,
+  writable: true,
+  enumerable: true,
+  configurable: true,
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/flatMap/this-value-ctor-non-object.js b/js/src/tests/test262/built-ins/Array/prototype/flatMap/this-value-ctor-non-object.js
new file mode 100644
index 0000000000..896f1054ea
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/flatMap/this-value-ctor-non-object.js
@@ -0,0 +1,84 @@
+// Copyright (C) 2018 Shilpi Jain and Michael Ficarra. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.flatMap
+description: >
+  Assert behavior if this value has a custom non-object constructor property
+info: |
+  Array.prototype.flatMap ( mapperFunction [ , thisArg ] )
+
+  1. Let O be ? ToObject(this value).
+  2. Let sourceLen be ? ToLength(? Get(O, "length")).
+  ...
+  5. Let A be ? ArraySpeciesCreate(O, 0).
+  ...
+
+  ArraySpeciesCreate ( originalArray, length )
+
+  3. Let isArray be ? IsArray(originalArray).
+  4. If isArray is false, return ? ArrayCreate(length).
+  5. Let C be ? Get(originalArray, "constructor").
+  6. If IsConstructor(C) is true, then
+    a. Let thisRealm be the current Realm Record.
+    b. Let realmC be ? GetFunctionRealm(C).
+    c. If thisRealm and realmC are not the same Realm Record, then
+      i. If SameValue(C, realmC.[[Intrinsics]].[[%Array%]]) is true, set C to undefined.
+  7. If Type(C) is Object, then
+    a. Set C to ? Get(C, @@species).
+    b. If C is null, set C to undefined.
+  8. If C is undefined, return ? ArrayCreate(length).
+  9. If IsConstructor(C) is false, throw a TypeError exception.
+features: [Array.prototype.flatMap, Symbol]
+includes: [compareArray.js]
+---*/
+
+assert.sameValue(
+  typeof Array.prototype.flatMap,
+  'function',
+  'The value of `typeof Array.prototype.flatMap` is expected to be "function"'
+);
+
+var a = [];
+var mapperFn = function() {};
+
+a.constructor = null;
+assert.throws(TypeError, function() {
+  a.flatMap(mapperFn);
+}, 'a.flatMap(mapperFn) throws a TypeError exception');
+
+a = [];
+a.constructor = 1;
+assert.throws(TypeError, function() {
+  a.flatMap(mapperFn);
+}, 'a.flatMap(mapperFn) throws a TypeError exception');
+
+a = [];
+a.constructor = 'string';
+assert.throws(TypeError, function() {
+  a.flatMap(mapperFn);
+}, 'a.flatMap(mapperFn) throws a TypeError exception');
+
+a = [];
+a.constructor = true;
+assert.throws(TypeError, function() {
+  a.flatMap(mapperFn);
+}, 'a.flatMap(mapperFn) throws a TypeError exception');
+
+a = [];
+a.constructor = Symbol();
+assert.throws(TypeError, function() {
+  a.flatMap(mapperFn);
+}, 'a.flatMap(mapperFn) throws a TypeError exception');
+
+a = [];
+a.constructor = undefined;
+var actual = a.flatMap(mapperFn);
+assert.compareArray(actual, [], 'The value of actual is expected to be []');
+assert.sameValue(
+  Object.getPrototypeOf(actual),
+  Array.prototype,
+  'Object.getPrototypeOf(a.flatMap(mapperFn)) returns Array.prototype'
+);
+assert.notSameValue(actual, a, 'The value of actual is expected to not equal the value of `a`');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/flatMap/this-value-ctor-object-species-bad-throws.js b/js/src/tests/test262/built-ins/Array/prototype/flatMap/this-value-ctor-object-species-bad-throws.js
new file mode 100644
index 0000000000..e7ebabfce3
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/flatMap/this-value-ctor-object-species-bad-throws.js
@@ -0,0 +1,139 @@
+// Copyright (C) 2018 Leo Balter. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.flatMap
+description: >
+  Assert behavior if this value has a custom object constructor property species
+info: |
+  Array.prototype.flatMap ( mapperFunction [ , thisArg ] )
+
+  1. Let O be ? ToObject(this value).
+  2. Let sourceLen be ? ToLength(? Get(O, "length")).
+  ...
+  5. Let A be ? ArraySpeciesCreate(O, 0).
+  ...
+
+  ArraySpeciesCreate ( originalArray, length )
+
+  3. Let isArray be ? IsArray(originalArray).
+  4. If isArray is false, return ? ArrayCreate(length).
+  5. Let C be ? Get(originalArray, "constructor").
+  6. If IsConstructor(C) is true, then
+    a. Let thisRealm be the current Realm Record.
+    b. Let realmC be ? GetFunctionRealm(C).
+    c. If thisRealm and realmC are not the same Realm Record, then
+      i. If SameValue(C, realmC.[[Intrinsics]].[[%Array%]]) is true, set C to undefined.
+  7. If Type(C) is Object, then
+    a. Set C to ? Get(C, @@species).
+    b. If C is null, set C to undefined.
+  8. If C is undefined, return ? ArrayCreate(length).
+  9. If IsConstructor(C) is false, throw a TypeError exception.
+  10. Return ? Construct(C, « length »).
+features: [Array.prototype.flatMap, Symbol, Symbol.species]
+includes: [compareArray.js]
+---*/
+
+assert.sameValue(
+  typeof Array.prototype.flatMap,
+  'function',
+  'The value of `typeof Array.prototype.flatMap` is expected to be "function"'
+);
+
+var arr = [[42, 1], [42, 2]];
+var mapperFn = function(e) { return e; };
+
+arr.constructor = {};
+var actual = arr.flatMap(mapperFn);
+assert.compareArray(actual, [42, 1, 42, 2], 'The value of actual is expected to be [42, 1, 42, 2]');
+assert.sameValue(
+  Object.getPrototypeOf(actual),
+  Array.prototype,
+  'Object.getPrototypeOf(arr.flatMap(mapperFn)) returns Array.prototype'
+);
+
+var called = 0;
+arr.constructor = {
+  get [Symbol.species]() {
+    called++;
+    return 0;
+  }
+};
+assert.throws(TypeError, function() {
+  arr.flatMap(mapperFn);
+}, 'arr.flatMap(mapperFn) throws a TypeError exception');
+assert.sameValue(called, 1, 'The value of called is expected to be 1');
+
+called = 0;
+arr.constructor = {
+  get [Symbol.species]() {
+    called++;
+    return '';
+  }
+};
+assert.throws(TypeError, function() {
+  arr.flatMap(mapperFn);
+}, 'arr.flatMap(mapperFn) throws a TypeError exception');
+assert.sameValue(called, 1, 'The value of called is expected to be 1');
+
+called = 0;
+arr.constructor = {
+  get [Symbol.species]() {
+    called++;
+    return false;
+  }
+};
+assert.throws(TypeError, function() {
+  arr.flatMap(mapperFn);
+}, 'arr.flatMap(mapperFn) throws a TypeError exception');
+assert.sameValue(called, 1, 'The value of called is expected to be 1');
+
+called = 0;
+arr.constructor = {
+  get [Symbol.species]() {
+    called++;
+    return {};
+  }
+};
+assert.throws(TypeError, function() {
+  arr.flatMap(mapperFn);
+}, 'arr.flatMap(mapperFn) throws a TypeError exception');
+assert.sameValue(called, 1, 'The value of called is expected to be 1');
+
+called = 0;
+arr.constructor = {
+  get [Symbol.species]() {
+    called++;
+    return [];
+  }
+};
+assert.throws(TypeError, function() {
+  arr.flatMap(mapperFn);
+}, 'arr.flatMap(mapperFn) throws a TypeError exception');
+assert.sameValue(called, 1, 'The value of called is expected to be 1');
+
+called = 0;
+arr.constructor = {
+  get [Symbol.species]() {
+    called++;
+    return Symbol();
+  }
+};
+assert.throws(TypeError, function() {
+  arr.flatMap(mapperFn);
+}, 'arr.flatMap(mapperFn) throws a TypeError exception');
+assert.sameValue(called, 1, 'The value of called is expected to be 1');
+
+called = 0;
+arr.constructor = {
+  get [Symbol.species]() {
+    called++;
+    throw new Test262Error
+  }
+};
+assert.throws(Test262Error, function() {
+  arr.flatMap(mapperFn);
+}, 'arr.flatMap(mapperFn) throws a Test262Error exception');
+assert.sameValue(called, 1, 'The value of called is expected to be 1');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/flatMap/this-value-ctor-object-species-custom-ctor-poisoned-throws.js b/js/src/tests/test262/built-ins/Array/prototype/flatMap/this-value-ctor-object-species-custom-ctor-poisoned-throws.js
new file mode 100644
index 0000000000..e3d6cd262e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/flatMap/this-value-ctor-object-species-custom-ctor-poisoned-throws.js
@@ -0,0 +1,60 @@
+// Copyright (C) 2018 Leo Balter. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.flatMap
+description: >
+  Assert behavior if this value has a poisoned custom species constructor
+info: |
+  Array.prototype.flatMap ( mapperFunction [ , thisArg ] )
+
+  1. Let O be ? ToObject(this value).
+  2. Let sourceLen be ? ToLength(? Get(O, "length")).
+  ...
+  5. Let A be ? ArraySpeciesCreate(O, 0).
+  6. Perform ? FlattenIntoArray(A, O, sourceLen, 0, 1, mapperFunction, T).
+  7. Return A.
+
+  ArraySpeciesCreate ( originalArray, length )
+
+  3. Let isArray be ? IsArray(originalArray).
+  4. If isArray is false, return ? ArrayCreate(length).
+  5. Let C be ? Get(originalArray, "constructor").
+  6. If IsConstructor(C) is true, then
+    ...
+  7. If Type(C) is Object, then
+    a. Set C to ? Get(C, @@species).
+    b. If C is null, set C to undefined.
+  8. If C is undefined, return ? ArrayCreate(length).
+  9. If IsConstructor(C) is false, throw a TypeError exception.
+  10. Return ? Construct(C, « length »).
+features: [Array.prototype.flatMap, Symbol, Symbol.species]
+---*/
+
+assert.sameValue(typeof Array.prototype.flatMap, 'function');
+
+var arr = [];
+var mapperFn = function(e) { return e; };
+
+var called = 0;
+var ctorCalled = 0;
+function ctor(len) {
+  assert.sameValue(new.target, ctor, 'new target is defined');
+  assert.sameValue(len, 0, 'first argument is always 0');
+  ctorCalled++;
+  throw new Test262Error();
+}
+
+arr.constructor = {
+  get [Symbol.species]() {
+    called++;
+    return ctor;
+  }
+};
+assert.throws(Test262Error, function() {
+  arr.flatMap(mapperFn);
+}, 'Return abrupt completion from species custom ctor');
+assert.sameValue(called, 1, 'got species once');
+assert.sameValue(ctorCalled, 1, 'called custom ctor once');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/flatMap/this-value-ctor-object-species-custom-ctor.js b/js/src/tests/test262/built-ins/Array/prototype/flatMap/this-value-ctor-object-species-custom-ctor.js
new file mode 100644
index 0000000000..1424e57d24
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/flatMap/this-value-ctor-object-species-custom-ctor.js
@@ -0,0 +1,96 @@
+// Copyright (C) 2018 Leo Balter. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.flatMap
+description: >
+  Assert behavior if this value has a custom species constructor
+info: |
+  Array.prototype.flatMap ( mapperFunction [ , thisArg ] )
+
+  1. Let O be ? ToObject(this value).
+  2. Let sourceLen be ? ToLength(? Get(O, "length")).
+  ...
+  5. Let A be ? ArraySpeciesCreate(O, 0).
+  6. Perform ? FlattenIntoArray(A, O, sourceLen, 0, 1, mapperFunction, T).
+  7. Return A.
+
+  ArraySpeciesCreate ( originalArray, length )
+
+  3. Let isArray be ? IsArray(originalArray).
+  4. If isArray is false, return ? ArrayCreate(length).
+  5. Let C be ? Get(originalArray, "constructor").
+  6. If IsConstructor(C) is true, then
+    ...
+  7. If Type(C) is Object, then
+    a. Set C to ? Get(C, @@species).
+    b. If C is null, set C to undefined.
+  8. If C is undefined, return ? ArrayCreate(length).
+  9. If IsConstructor(C) is false, throw a TypeError exception.
+  10. Return ? Construct(C, « length »).
+
+  FlattenIntoArray(target, source, sourceLen, start, depth [ , mapperFunction, thisArg ])
+
+  3. Repeat, while sourceIndex < sourceLen
+    a. Let P be ! ToString(sourceIndex).
+    b. Let exists be ? HasProperty(source, P).
+    c. If exists is true, then
+      ...
+      vi. Else,
+        ...
+        2. Perform ? CreateDataPropertyOrThrow(target, ! ToString(targetIndex), element).
+features: [Array.prototype.flatMap, Symbol, Symbol.species]
+includes: [propertyHelper.js]
+---*/
+
+assert.sameValue(typeof Array.prototype.flatMap, 'function');
+
+var arr = [[42, 1], [42, 2]];
+var mapperFn = function(e) { return e; };
+
+var called = 0;
+var ctorCalled = 0;
+function ctor(len) {
+  assert.sameValue(new.target, ctor, 'new target is defined');
+  assert.sameValue(len, 0, 'first argument is always 0');
+  ctorCalled++;
+}
+
+arr.constructor = {
+  get [Symbol.species]() {
+    called++;
+    return ctor;
+  }
+};
+var actual = arr.flatMap(mapperFn);
+assert(actual instanceof ctor, 'returned value is an instance of custom ctor');
+assert.sameValue(called, 1, 'got species once');
+assert.sameValue(ctorCalled, 1, 'called custom ctor once');
+
+assert.sameValue(Object.prototype.hasOwnProperty.call(actual, 'length'), false, 'it does not define an own length property');
+verifyProperty(actual, '0', {
+  configurable: true,
+  writable: true,
+  enumerable: true,
+  value: 42
+});
+verifyProperty(actual, '1', {
+  configurable: true,
+  writable: true,
+  enumerable: true,
+  value: 1
+});
+verifyProperty(actual, '2', {
+  configurable: true,
+  writable: true,
+  enumerable: true,
+  value: 42
+});
+verifyProperty(actual, '3', {
+  configurable: true,
+  writable: true,
+  enumerable: true,
+  value: 2
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/flatMap/this-value-ctor-object-species.js b/js/src/tests/test262/built-ins/Array/prototype/flatMap/this-value-ctor-object-species.js
new file mode 100644
index 0000000000..25106bdbe2
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/flatMap/this-value-ctor-object-species.js
@@ -0,0 +1,159 @@
+// Copyright (C) 2018 Leo Balter. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.flatMap
+description: >
+  Assert behavior if this value has a custom object constructor property
+info: |
+  Array.prototype.flatMap ( mapperFunction [ , thisArg ] )
+
+  1. Let O be ? ToObject(this value).
+  2. Let sourceLen be ? ToLength(? Get(O, "length")).
+  ...
+  5. Let A be ? ArraySpeciesCreate(O, 0).
+  ...
+
+  ArraySpeciesCreate ( originalArray, length )
+
+  3. Let isArray be ? IsArray(originalArray).
+  4. If isArray is false, return ? ArrayCreate(length).
+  5. Let C be ? Get(originalArray, "constructor").
+  6. If IsConstructor(C) is true, then
+    a. Let thisRealm be the current Realm Record.
+    b. Let realmC be ? GetFunctionRealm(C).
+    c. If thisRealm and realmC are not the same Realm Record, then
+      i. If SameValue(C, realmC.[[Intrinsics]].[[%Array%]]) is true, set C to undefined.
+  7. If Type(C) is Object, then
+    a. Set C to ? Get(C, @@species).
+    b. If C is null, set C to undefined.
+  8. If C is undefined, return ? ArrayCreate(length).
+  9. If IsConstructor(C) is false, throw a TypeError exception.
+  10. Return ? Construct(C, « length »).
+features: [Array.prototype.flatMap, Symbol, Symbol.species]
+includes: [compareArray.js]
+---*/
+
+assert.sameValue(
+  typeof Array.prototype.flatMap,
+  'function',
+  'The value of `typeof Array.prototype.flatMap` is expected to be "function"'
+);
+
+var arr = [[42, 1], [42, 2]];
+var mapperFn = function(e) { return e; };
+
+arr.constructor = {};
+var actual = arr.flatMap(mapperFn);
+assert.compareArray(actual, [42, 1, 42, 2], 'The value of actual is expected to be [42, 1, 42, 2]');
+assert.sameValue(
+  Object.getPrototypeOf(actual),
+  Array.prototype,
+  'Object.getPrototypeOf(arr.flatMap(mapperFn)) returns Array.prototype'
+);
+
+var called = 0;
+arr.constructor = {
+  get [Symbol.species]() {
+    called++;
+    return null;
+  }
+};
+actual = arr.flatMap(mapperFn);
+assert.compareArray(actual, [42, 1, 42, 2], 'The value of actual is expected to be [42, 1, 42, 2]');
+assert.sameValue(
+  Object.getPrototypeOf(actual),
+  Array.prototype,
+  'Object.getPrototypeOf(arr.flatMap(mapperFn)) returns Array.prototype'
+);
+assert.sameValue(called, 1, 'The value of called is expected to be 1');
+
+called = 0;
+arr.constructor = {
+  get [Symbol.species]() {
+    called++;
+    return undefined;
+  }
+};
+actual = arr.flatMap(mapperFn);
+assert.compareArray(actual, [42, 1, 42, 2], 'The value of actual is expected to be [42, 1, 42, 2]');
+assert.sameValue(
+  Object.getPrototypeOf(actual),
+  Array.prototype,
+  'Object.getPrototypeOf(arr.flatMap(mapperFn)) returns Array.prototype'
+);
+assert.sameValue(called, 1, 'The value of called is expected to be 1');
+
+called = 0;
+arr.constructor = {
+  get [Symbol.species]() {
+    called++;
+    return 0;
+  }
+};
+assert.throws(TypeError, function() {
+  arr.flatMap(mapperFn);
+}, 'arr.flatMap(mapperFn) throws a TypeError exception');
+assert.sameValue(called, 1, 'The value of called is expected to be 1');
+
+called = 0;
+arr.constructor = {
+  get [Symbol.species]() {
+    called++;
+    return '';
+  }
+};
+assert.throws(TypeError, function() {
+  arr.flatMap(mapperFn);
+}, 'arr.flatMap(mapperFn) throws a TypeError exception');
+assert.sameValue(called, 1, 'The value of called is expected to be 1');
+
+called = 0;
+arr.constructor = {
+  get [Symbol.species]() {
+    called++;
+    return false;
+  }
+};
+assert.throws(TypeError, function() {
+  arr.flatMap(mapperFn);
+}, 'arr.flatMap(mapperFn) throws a TypeError exception');
+assert.sameValue(called, 1, 'The value of called is expected to be 1');
+
+called = 0;
+arr.constructor = {
+  get [Symbol.species]() {
+    called++;
+    return {};
+  }
+};
+assert.throws(TypeError, function() {
+  arr.flatMap(mapperFn);
+}, 'arr.flatMap(mapperFn) throws a TypeError exception');
+assert.sameValue(called, 1, 'The value of called is expected to be 1');
+
+called = 0;
+arr.constructor = {
+  get [Symbol.species]() {
+    called++;
+    return [];
+  }
+};
+assert.throws(TypeError, function() {
+  arr.flatMap(mapperFn);
+}, 'arr.flatMap(mapperFn) throws a TypeError exception');
+assert.sameValue(called, 1, 'The value of called is expected to be 1');
+
+called = 0;
+arr.constructor = {
+  get [Symbol.species]() {
+    called++;
+    return Symbol();
+  }
+};
+assert.throws(TypeError, function() {
+  arr.flatMap(mapperFn);
+}, 'arr.flatMap(mapperFn) throws a TypeError exception');
+assert.sameValue(called, 1, 'The value of called is expected to be 1');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/flatMap/this-value-null-undefined-throws.js b/js/src/tests/test262/built-ins/Array/prototype/flatMap/this-value-null-undefined-throws.js
new file mode 100644
index 0000000000..f2b52aeb34
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/flatMap/this-value-null-undefined-throws.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2018 Shilpi Jain and Michael Ficarra. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.flatMap
+description: >
+  Throw a TypeError if this value is null or undefined
+info: |
+  Array.prototype.flatMap ( mapperFunction [ , thisArg ] )
+
+  1. Let O be ? ToObject(this value).
+  ...
+features: [Array.prototype.flatMap]
+---*/
+
+assert.sameValue(typeof Array.prototype.flatMap, 'function');
+
+var mapperFn = function() {};
+
+assert.throws(TypeError, function() {
+  [].flatMap.call(null, mapperFn);
+}, 'null value');
+
+assert.throws(TypeError, function() {
+  [].flatMap.call(undefined, mapperFn);
+}, 'undefined');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/flatMap/thisArg-argument-strict.js b/js/src/tests/test262/built-ins/Array/prototype/flatMap/thisArg-argument-strict.js
new file mode 100644
index 0000000000..b2b1ad9347
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/flatMap/thisArg-argument-strict.js
@@ -0,0 +1,48 @@
+'use strict';
+// Copyright (C) 2018 Shilpi Jain and Michael Ficarra. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.flatMap
+description: >
+    Behavior when thisArg is provided
+    Array.prototype.flatMap ( mapperFunction [ , thisArg ] )
+flags: [onlyStrict]
+includes: [compareArray.js]
+features: [Array.prototype.flatMap]
+---*/
+
+var a = {};
+var actual;
+
+actual = [1].flatMap(function() {
+  return [this];
+}, "TestString");
+assert.compareArray(actual, ["TestString"], 'The value of actual is expected to be ["TestString"]');
+
+actual = [1].flatMap(function() {
+  return [this];
+}, 1);
+assert.compareArray(actual, [1], 'The value of actual is expected to be [1]');
+
+actual = [1].flatMap(function() {
+  return [this];
+}, null);
+assert.compareArray(actual, [null], 'The value of actual is expected to be [null]');
+
+actual = [1].flatMap(function() {
+  return [this];
+}, true);
+assert.compareArray(actual, [true], 'The value of actual is expected to be [true]');
+
+actual = [1].flatMap(function() {
+  return [this];
+}, a);
+assert.compareArray(actual, [a], 'The value of actual is expected to be [a]');
+
+actual = [1].flatMap(function() {
+  return [this];
+}, void 0);
+assert.compareArray(actual, [undefined], 'The value of actual is expected to be [undefined]');
+
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-1-1.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-1-1.js
new file mode 100644
index 0000000000..97ba0e7da3
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-1-1.js
@@ -0,0 +1,14 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: Array.prototype.forEach applied to undefined
+---*/
+
+
+assert.throws(TypeError, function() {
+  Array.prototype.forEach.call(undefined); // TypeError is thrown if value is undefined
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-1-10.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-1-10.js
new file mode 100644
index 0000000000..5111e7439e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-1-10.js
@@ -0,0 +1,21 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: Array.prototype.forEach applied to the Math object
+---*/
+
+var result = false;
+
+function callbackfn(val, idx, obj) {
+  result = ('[object Math]' === Object.prototype.toString.call(obj));
+}
+
+Math.length = 1;
+Math[0] = 1;
+Array.prototype.forEach.call(Math, callbackfn);
+
+assert(result, 'result !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-1-11.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-1-11.js
new file mode 100644
index 0000000000..b4f123e219
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-1-11.js
@@ -0,0 +1,23 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: Array.prototype.forEach applied to Date object
+---*/
+
+var result = false;
+
+function callbackfn(val, idx, obj) {
+  result = obj instanceof Date;
+}
+
+var obj = new Date();
+obj.length = 1;
+obj[0] = 1;
+
+Array.prototype.forEach.call(obj, callbackfn);
+
+assert(result, 'result !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-1-12.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-1-12.js
new file mode 100644
index 0000000000..75339e9910
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-1-12.js
@@ -0,0 +1,23 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: Array.prototype.forEach applied to RegExp object
+---*/
+
+var result = false;
+
+function callbackfn(val, idx, obj) {
+  result = obj instanceof RegExp;
+}
+
+var obj = new RegExp();
+obj.length = 1;
+obj[0] = 1;
+
+Array.prototype.forEach.call(obj, callbackfn);
+
+assert(result, 'result !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-1-13.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-1-13.js
new file mode 100644
index 0000000000..02a8100a02
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-1-13.js
@@ -0,0 +1,21 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: Array.prototype.forEach applied to the JSON object
+---*/
+
+var result = false;
+
+function callbackfn(val, idx, obj) {
+  result = ('[object JSON]' === Object.prototype.toString.call(obj));
+}
+
+JSON.length = 1;
+JSON[0] = 1;
+Array.prototype.forEach.call(JSON, callbackfn);
+
+assert(result, 'result !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-1-14.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-1-14.js
new file mode 100644
index 0000000000..df44a2e13d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-1-14.js
@@ -0,0 +1,23 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: Array.prototype.forEach applied to Error object
+---*/
+
+var result = false;
+
+function callbackfn(val, idx, obj) {
+  result = obj instanceof Error;
+}
+
+var obj = new Error();
+obj.length = 1;
+obj[0] = 1;
+
+Array.prototype.forEach.call(obj, callbackfn);
+
+assert(result, 'result !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-1-15.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-1-15.js
new file mode 100644
index 0000000000..4a7d180d32
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-1-15.js
@@ -0,0 +1,23 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: Array.prototype.forEach applied to the Arguments object
+---*/
+
+var result = false;
+
+function callbackfn(val, idx, obj) {
+  result = ('[object Arguments]' === Object.prototype.toString.call(obj));
+}
+
+var obj = (function() {
+  return arguments;
+}("a", "b"));
+
+Array.prototype.forEach.call(obj, callbackfn);
+
+assert(result, 'result !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-1-2.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-1-2.js
new file mode 100644
index 0000000000..e098f04e7c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-1-2.js
@@ -0,0 +1,14 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: Array.prototype.forEach applied to null
+---*/
+
+
+assert.throws(TypeError, function() {
+  Array.prototype.forEach.call(null); // TypeError is thrown if value is null
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-1-3.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-1-3.js
new file mode 100644
index 0000000000..dbeae73b60
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-1-3.js
@@ -0,0 +1,22 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: Array.prototype.forEach applied to boolean primitive
+---*/
+
+var result = false;
+
+function callbackfn(val, idx, obj) {
+  result = obj instanceof Boolean;
+}
+
+Boolean.prototype[0] = true;
+Boolean.prototype.length = 1;
+
+Array.prototype.forEach.call(false, callbackfn);
+
+assert(result, 'result !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-1-4.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-1-4.js
new file mode 100644
index 0000000000..75a5123bd3
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-1-4.js
@@ -0,0 +1,24 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: Array.prototype.forEach applied to Boolean object
+---*/
+
+var result = false;
+
+function callbackfn(val, idx, obj) {
+  result = obj instanceof Boolean;
+}
+
+var obj = new Boolean(true);
+obj.length = 2;
+obj[0] = 11;
+obj[1] = 12;
+
+Array.prototype.forEach.call(obj, callbackfn);
+
+assert(result, 'result !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-1-5.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-1-5.js
new file mode 100644
index 0000000000..68178afdc4
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-1-5.js
@@ -0,0 +1,22 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: Array.prototype.forEach applied to number primitive
+---*/
+
+var result = false;
+
+function callbackfn(val, idx, obj) {
+  result = obj instanceof Number;
+}
+
+Number.prototype[0] = 1;
+Number.prototype.length = 1;
+
+Array.prototype.forEach.call(2.5, callbackfn);
+
+assert(result, 'result !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-1-6.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-1-6.js
new file mode 100644
index 0000000000..cc0ce7ab45
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-1-6.js
@@ -0,0 +1,24 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: Array.prototype.forEach applied to Number object
+---*/
+
+var result = false;
+
+function callbackfn(val, idx, obj) {
+  result = obj instanceof Number;
+}
+
+var obj = new Number(-128);
+obj.length = 2;
+obj[0] = 11;
+obj[1] = 12;
+
+Array.prototype.forEach.call(obj, callbackfn);
+
+assert(result, 'result !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-1-7.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-1-7.js
new file mode 100644
index 0000000000..50d0615659
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-1-7.js
@@ -0,0 +1,19 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: Array.prototype.forEach applied to string primitive
+---*/
+
+var result = false;
+
+function callbackfn(val, idx, obj) {
+  result = obj instanceof String;
+}
+
+Array.prototype.forEach.call("abc", callbackfn);
+
+assert(result, 'result !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-1-8.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-1-8.js
new file mode 100644
index 0000000000..b87705bec5
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-1-8.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: Array.prototype.forEach applied to String object
+---*/
+
+var result = false;
+
+function callbackfn(val, idx, obj) {
+  result = obj instanceof String;
+}
+
+var obj = new String("abc");
+Array.prototype.forEach.call(obj, callbackfn);
+
+assert(result, 'result !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-1-9.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-1-9.js
new file mode 100644
index 0000000000..5c6a97e425
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-1-9.js
@@ -0,0 +1,25 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: Array.prototype.forEach applied to Function object
+---*/
+
+var result = false;
+
+function callbackfn(val, idx, obj) {
+  result = obj instanceof Function;
+}
+
+var obj = function(a, b) {
+  return a + b;
+};
+obj[0] = 11;
+obj[1] = 9;
+
+Array.prototype.forEach.call(obj, callbackfn);
+
+assert(result, 'result !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-2-1.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-2-1.js
new file mode 100644
index 0000000000..049761cb71
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-2-1.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: >
+    Array.prototype.forEach - 'length' is own data property on an
+    Array-like object
+---*/
+
+var result = false;
+
+function callbackfn(val, idx, obj) {
+  result = (obj.length === 2);
+}
+
+var obj = {
+  0: 12,
+  1: 11,
+  2: 9,
+  length: 2
+};
+
+Array.prototype.forEach.call(obj, callbackfn);
+
+assert(result, 'result !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-2-10.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-2-10.js
new file mode 100644
index 0000000000..87dd30422d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-2-10.js
@@ -0,0 +1,38 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: >
+    Array.prototype.forEach applied to Array-like object, 'length' is
+    an inherited accessor property
+---*/
+
+var result = false;
+
+function callbackfn(val, idx, obj) {
+  result = (obj.length === 2);
+}
+
+var proto = {};
+
+Object.defineProperty(proto, "length", {
+  get: function() {
+    return 2;
+  },
+  configurable: true
+});
+
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+child[0] = 12;
+child[1] = 11;
+child[2] = 9;
+
+Array.prototype.forEach.call(child, callbackfn);
+
+assert(result, 'result !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-2-11.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-2-11.js
new file mode 100644
index 0000000000..510a7ed21e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-2-11.js
@@ -0,0 +1,30 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: >
+    Array.prototype.forEach applied to Array-like object, 'length' is
+    an own accessor property without a get function
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+}
+
+var obj = {
+  0: 11,
+  1: 12
+};
+Object.defineProperty(obj, "length", {
+  set: function() {},
+  configurable: true
+});
+
+Array.prototype.forEach.call(obj, callbackfn);
+
+assert.sameValue(accessed, false, 'accessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-2-12.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-2-12.js
new file mode 100644
index 0000000000..a8bbd6f1af
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-2-12.js
@@ -0,0 +1,38 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: >
+    Array.prototype.forEach - 'length' is own accessor property
+    without a get function that overrides an inherited accessor
+    property on an Array
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+}
+
+Object.defineProperty(Object.prototype, "length", {
+  get: function() {
+    return 2;
+  },
+  configurable: true
+});
+
+var obj = {
+  0: 12,
+  1: 11
+};
+Object.defineProperty(obj, "length", {
+  set: function() {},
+  configurable: true
+});
+
+Array.prototype.forEach.call(obj, callbackfn);
+
+assert.sameValue(accessed, false, 'accessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-2-13.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-2-13.js
new file mode 100644
index 0000000000..540a8394cf
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-2-13.js
@@ -0,0 +1,34 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: >
+    Array.prototype.forEach applied to the Array-like object that
+    'length' is inherited accessor property without a get function
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+}
+
+var proto = {};
+Object.defineProperty(proto, "length", {
+  set: function() {},
+  configurable: true
+});
+
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+child[0] = 11;
+child[1] = 12;
+
+Array.prototype.forEach.call(child, callbackfn);
+
+assert.sameValue(accessed, false, 'accessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-2-14.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-2-14.js
new file mode 100644
index 0000000000..f0c0721d9c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-2-14.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: >
+    Array.prototype.forEach applied to the Array-like object that
+    'length' property doesn't exist
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+}
+
+var obj = {
+  0: 11,
+  1: 12
+};
+
+Array.prototype.forEach.call(obj, callbackfn);
+
+assert.sameValue(accessed, false, 'accessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-2-17.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-2-17.js
new file mode 100644
index 0000000000..331c567413
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-2-17.js
@@ -0,0 +1,25 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: >
+    Array.prototype.forEach applied to the Arguments object, which
+    implements its own property get method
+---*/
+
+var result = false;
+
+function callbackfn(val, idx, obj) {
+  result = (obj.length === 2);
+}
+
+var func = function(a, b) {
+  arguments[2] = 9;
+  Array.prototype.forEach.call(arguments, callbackfn);
+  return result;
+};
+
+assert(func(12, 11), 'func(12, 11) !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-2-18.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-2-18.js
new file mode 100644
index 0000000000..0635558208
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-2-18.js
@@ -0,0 +1,23 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: >
+    Array.prototype.forEach applied to String object, which implements
+    its own property get method
+---*/
+
+var result = false;
+
+function callbackfn(val, idx, obj) {
+  result = (obj.length === 3);
+}
+
+var str = new String("012");
+
+Array.prototype.forEach.call(str, callbackfn);
+
+assert(result, 'result !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-2-19.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-2-19.js
new file mode 100644
index 0000000000..a18c47d3e1
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-2-19.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: >
+    Array.prototype.forEach applied to Function object, which
+    implements its own property get method
+---*/
+
+var result = false;
+
+function callbackfn(val, idx, obj) {
+  result = (obj.length === 2);
+}
+
+var fun = function(a, b) {
+  return a + b;
+};
+fun[0] = 12;
+fun[1] = 11;
+fun[2] = 9;
+
+Array.prototype.forEach.call(fun, callbackfn);
+
+assert(result, 'result !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-2-2.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-2-2.js
new file mode 100644
index 0000000000..9bd8645233
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-2-2.js
@@ -0,0 +1,19 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: Array.prototype.forEach - 'length' is own data property on an Array
+---*/
+
+var result = false;
+
+function callbackfn(val, idx, obj) {
+  result = (obj.length === 2);
+}
+
+[12, 11].forEach(callbackfn);
+
+assert(result, 'result !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-2-3.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-2-3.js
new file mode 100644
index 0000000000..19b2e2c686
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-2-3.js
@@ -0,0 +1,34 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: >
+    Array.prototype.forEach - 'length' is an own data property that
+    overrides an inherited data property on an Array-like object
+---*/
+
+var result = false;
+
+function callbackfn(val, idx, obj) {
+  result = (obj.length === 2);
+}
+
+var proto = {
+  length: 3
+};
+
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+child.length = 2;
+child[0] = 12;
+child[1] = 11;
+child[2] = 9;
+
+Array.prototype.forEach.call(child, callbackfn);
+
+assert(result, 'result !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-2-4.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-2-4.js
new file mode 100644
index 0000000000..bc7c2f0566
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-2-4.js
@@ -0,0 +1,24 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: >
+    Array.prototype.forEach - 'length' is own data property that
+    overrides an inherited data property on an Array
+---*/
+
+var result = false;
+var arrProtoLen;
+
+function callbackfn(val, idx, obj) {
+  result = (obj.length === 2);
+}
+
+arrProtoLen = Array.prototype.length;
+Array.prototype.length = 0;
+[12, 11].forEach(callbackfn);
+
+assert(result, 'result !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-2-5.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-2-5.js
new file mode 100644
index 0000000000..4b7348b4d8
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-2-5.js
@@ -0,0 +1,42 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: >
+    Array.prototype.forEach applied to Array-like object, 'length' is
+    an own data property that overrides an inherited accessor property
+---*/
+
+var result = false;
+
+function callbackfn(val, idx, obj) {
+  result = (obj.length === 2);
+}
+
+var proto = {};
+
+Object.defineProperty(proto, "length", {
+  get: function() {
+    return 3;
+  },
+  configurable: true
+});
+
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+Object.defineProperty(child, "length", {
+  value: 2,
+  configurable: true
+});
+child[0] = 12;
+child[1] = 11;
+child[2] = 9;
+
+Array.prototype.forEach.call(child, callbackfn);
+
+assert(result, 'result !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-2-6.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-2-6.js
new file mode 100644
index 0000000000..19a8f05448
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-2-6.js
@@ -0,0 +1,33 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: >
+    Array.prototype.forEach applied to Array-like object, 'length' is
+    an inherited data property
+---*/
+
+var result = false;
+
+function callbackfn(val, idx, obj) {
+  result = (obj.length === 2);
+}
+
+var proto = {
+  length: 2
+};
+
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+child[0] = 12;
+child[1] = 11;
+child[2] = 9;
+
+Array.prototype.forEach.call(child, callbackfn);
+
+assert(result, 'result !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-2-7.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-2-7.js
new file mode 100644
index 0000000000..cf5c407755
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-2-7.js
@@ -0,0 +1,34 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: >
+    Array.prototype.forEach applied to Array-like object, 'length' is
+    an own accessor property
+---*/
+
+var result = false;
+
+function callbackfn(val, idx, obj) {
+  result = (obj.length === 2);
+}
+
+var obj = {};
+
+Object.defineProperty(obj, "length", {
+  get: function() {
+    return 2;
+  },
+  configurable: true
+});
+
+obj[0] = 12;
+obj[1] = 11;
+obj[2] = 9;
+
+Array.prototype.forEach.call(obj, callbackfn);
+
+assert(result, 'result !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-2-8.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-2-8.js
new file mode 100644
index 0000000000..0cc7d8f8fe
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-2-8.js
@@ -0,0 +1,41 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: >
+    Array.prototype.forEach applied to Array-like object, 'length' is
+    an own accessor property that overrides an inherited data property
+---*/
+
+var result = false;
+
+function callbackfn(val, idx, obj) {
+  result = (obj.length === 2);
+}
+
+var proto = {
+  length: 3
+};
+
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+
+Object.defineProperty(child, "length", {
+  get: function() {
+    return 2;
+  },
+  configurable: true
+});
+
+child[0] = 12;
+child[1] = 11;
+child[2] = 9;
+
+Array.prototype.forEach.call(child, callbackfn);
+
+assert(result, 'result !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-2-9.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-2-9.js
new file mode 100644
index 0000000000..418e0fd618
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-2-9.js
@@ -0,0 +1,47 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: >
+    Array.prototype.forEach applied to Array-like object, 'length' is
+    an own accessor property that overrides an inherited accessor
+    property
+---*/
+
+var result = false;
+
+function callbackfn(val, idx, obj) {
+  result = (obj.length === 2);
+}
+
+var proto = {};
+
+Object.defineProperty(proto, "length", {
+  get: function() {
+    return 3;
+  },
+  configurable: true
+});
+
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+
+Object.defineProperty(child, "length", {
+  get: function() {
+    return 2;
+  },
+  configurable: true
+});
+
+child[0] = 12;
+child[1] = 11;
+child[2] = 9;
+
+Array.prototype.forEach.call(child, callbackfn);
+
+assert(result, 'result !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-3-1.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-3-1.js
new file mode 100644
index 0000000000..1ed6f554e9
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-3-1.js
@@ -0,0 +1,25 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: Array.prototype.forEach - value of 'length' is undefined
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+}
+
+var obj = {
+  0: 0,
+  1: 1,
+  length: undefined
+};
+
+Array.prototype.forEach.call(obj, callbackfn);
+
+assert.sameValue(accessed, false, 'accessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-3-10.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-3-10.js
new file mode 100644
index 0000000000..d55c5ae5a5
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-3-10.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: >
+    Array.prototype.forEach - value of 'length' is a number (value is
+    NaN)
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+}
+
+var obj = {
+  0: 9,
+  length: NaN
+};
+
+Array.prototype.forEach.call(obj, callbackfn);
+
+assert.sameValue(accessed, false, 'accessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-3-11.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-3-11.js
new file mode 100644
index 0000000000..5f38eed122
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-3-11.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+es5id: 15.4.4.18-3-11
+description: >
+    Array.prototype.forEach - 'length' is a string containing a
+    positive number
+---*/
+
+var testResult = false;
+
+function callbackfn(val, idx, obj) {
+  testResult = (val > 10);
+}
+
+var obj = {
+  1: 11,
+  2: 9,
+  length: "2"
+};
+
+Array.prototype.forEach.call(obj, callbackfn);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-3-12.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-3-12.js
new file mode 100644
index 0000000000..88182344e7
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-3-12.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+es5id: 15.4.4.18-3-12
+description: >
+    Array.prototype.forEach - 'length' is a string containing a
+    negative number
+---*/
+
+var testResult = false;
+
+function callbackfn(val, idx, obj) {
+  testResult = (val > 10);
+}
+
+var obj = {
+  1: 11,
+  2: 9,
+  length: "-4294967294"
+};
+
+Array.prototype.forEach.call(obj, callbackfn);
+
+assert.sameValue(testResult, false, 'testResult');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-3-13.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-3-13.js
new file mode 100644
index 0000000000..2e02b153dd
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-3-13.js
@@ -0,0 +1,27 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+es5id: 15.4.4.18-3-13
+description: >
+    Array.prototype.forEach - 'length' is a string containing a
+    decimal number
+---*/
+
+var testResult = false;
+
+function callbackfn(val, idx, obj) {
+  testResult = (val > 10);
+}
+var obj = {
+  1: 11,
+  2: 9,
+  length: "2.5"
+};
+
+Array.prototype.forEach.call(obj, callbackfn);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-3-14.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-3-14.js
new file mode 100644
index 0000000000..caea1bfe8a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-3-14.js
@@ -0,0 +1,25 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+es5id: 15.4.4.18-3-14
+description: Array.prototype.forEach - 'length' is a string containing -Infinity
+---*/
+
+var accessed2 = false;
+
+function callbackfn2(val, idx, obj) {
+  accessed2 = true;
+}
+
+var obj2 = {
+  0: 9,
+  length: "-Infinity"
+};
+
+Array.prototype.forEach.call(obj2, callbackfn2);
+
+assert.sameValue(accessed2, false, 'accessed2');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-3-15.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-3-15.js
new file mode 100644
index 0000000000..ad9ff226e1
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-3-15.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+es5id: 15.4.4.18-3-15
+description: >
+    Array.prototype.forEach - 'length' is a string containing an
+    exponential number
+---*/
+
+var testResult = false;
+
+function callbackfn(val, idx, obj) {
+  testResult = (val > 10);
+}
+
+var obj = {
+  1: 11,
+  2: 9,
+  length: "2E0"
+};
+
+Array.prototype.forEach.call(obj, callbackfn);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-3-16.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-3-16.js
new file mode 100644
index 0000000000..142e67ae2b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-3-16.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+es5id: 15.4.4.18-3-16
+description: >
+    Array.prototype.forEach - 'length' is a string containing a hex
+    number
+---*/
+
+var testResult = false;
+
+function callbackfn(val, idx, obj) {
+  testResult = (val > 10);
+}
+
+var obj = {
+  1: 11,
+  2: 9,
+  length: "0x0002"
+};
+
+Array.prototype.forEach.call(obj, callbackfn);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-3-17.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-3-17.js
new file mode 100644
index 0000000000..02f6f4a92c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-3-17.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+es5id: 15.4.4.18-3-17
+description: >
+    Array.prototype.forEach - 'length' is a string containing a number
+    with leading zeros
+---*/
+
+var testResult = false;
+
+function callbackfn(val, idx, obj) {
+  testResult = (val > 10);
+}
+
+var obj = {
+  1: 11,
+  2: 9,
+  length: "0002.00"
+};
+
+Array.prototype.forEach.call(obj, callbackfn);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-3-18.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-3-18.js
new file mode 100644
index 0000000000..e86eadea72
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-3-18.js
@@ -0,0 +1,27 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+es5id: 15.4.4.18-3-18
+description: >
+    Array.prototype.forEach - value of 'length' is a string that can't
+    convert to a number
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+}
+
+var obj = {
+  0: 9,
+  length: "asdf!_"
+};
+
+Array.prototype.forEach.call(obj, callbackfn);
+
+assert.sameValue(accessed, false, 'accessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-3-19.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-3-19.js
new file mode 100644
index 0000000000..eca8094b8c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-3-19.js
@@ -0,0 +1,32 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+es5id: 15.4.4.18-3-19
+description: >
+    Array.prototype.forEach - value of 'length' is an Object which has
+    an own toString method.
+---*/
+
+var testResult = false;
+
+function callbackfn(val, idx, obj) {
+  testResult = (val > 10);
+}
+
+var obj = {
+  1: 11,
+  2: 9,
+  length: {
+    toString: function() {
+      return '2';
+    }
+  }
+};
+
+Array.prototype.forEach.call(obj, callbackfn);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-3-2.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-3-2.js
new file mode 100644
index 0000000000..f4a7dd3612
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-3-2.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+es5id: 15.4.4.18-3-2
+description: >
+    Array.prototype.forEach - value of 'length' is a boolean (value is
+    true)
+---*/
+
+var testResult = false;
+
+function callbackfn(val, idx, obj) {
+  testResult = (val > 10);
+}
+
+var obj = {
+  0: 11,
+  1: 9,
+  length: true
+};
+
+Array.prototype.forEach.call(obj, callbackfn);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-3-20.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-3-20.js
new file mode 100644
index 0000000000..a8afca0e75
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-3-20.js
@@ -0,0 +1,32 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+es5id: 15.4.4.18-3-20
+description: >
+    Array.prototype.forEach - value of 'length' is an Object which has
+    an own valueOf method.
+---*/
+
+var testResult = false;
+
+function callbackfn(val, idx, obj) {
+  testResult = (val > 10);
+}
+
+var obj = {
+  1: 11,
+  2: 9,
+  length: {
+    valueOf: function() {
+      return 2;
+    }
+  }
+};
+
+Array.prototype.forEach.call(obj, callbackfn);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-3-21.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-3-21.js
new file mode 100644
index 0000000000..f03f2ac619
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-3-21.js
@@ -0,0 +1,42 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+es5id: 15.4.4.18-3-21
+description: >
+    Array.prototype.forEach - 'length' is an object that has an own
+    valueOf method that returns an object and toString method that
+    returns a string
+---*/
+
+var testResult = false;
+var firstStepOccured = false;
+var secondStepOccured = false;
+
+function callbackfn(val, idx, obj) {
+  testResult = (val > 10);
+}
+
+var obj = {
+  1: 11,
+  2: 9,
+  length: {
+    valueOf: function() {
+      firstStepOccured = true;
+      return {};
+    },
+    toString: function() {
+      secondStepOccured = true;
+      return '2';
+    }
+  }
+};
+
+Array.prototype.forEach.call(obj, callbackfn);
+
+assert(testResult, 'testResult !== true');
+assert(firstStepOccured, 'firstStepOccured !== true');
+assert(secondStepOccured, 'secondStepOccured !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-3-22.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-3-22.js
new file mode 100644
index 0000000000..db0322d283
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-3-22.js
@@ -0,0 +1,41 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+es5id: 15.4.4.18-3-22
+description: >
+    Array.prototype.forEach throws TypeError exception when 'length'
+    is an object with toString and valueOf methods that don�t return
+    primitive values
+---*/
+
+var accessed = false;
+var firstStepOccured = false;
+var secondStepOccured = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+}
+
+var obj = {
+  1: 11,
+  2: 12,
+
+  length: {
+    valueOf: function() {
+      firstStepOccured = true;
+      return {};
+    },
+    toString: function() {
+      secondStepOccured = true;
+      return {};
+    }
+  }
+};
+assert.throws(TypeError, function() {
+  Array.prototype.forEach.call(obj, callbackfn);
+});
+assert.sameValue(accessed, false, 'accessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-3-23.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-3-23.js
new file mode 100644
index 0000000000..924f5cf975
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-3-23.js
@@ -0,0 +1,50 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+es5id: 15.4.4.18-3-23
+description: >
+    Array.prototype.forEach uses inherited valueOf method when
+    'length' is an object with an own toString and inherited valueOf
+    methods
+---*/
+
+var testResult = false;
+var valueOfAccessed = false;
+var toStringAccessed = false;
+
+function callbackfn(val, idx, obj) {
+  testResult = (val > 10);
+}
+
+var proto = {
+  valueOf: function() {
+    valueOfAccessed = true;
+    return 2;
+  }
+};
+
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+
+child.toString = function() {
+  toStringAccessed = true;
+  return '1';
+};
+
+var obj = {
+  1: 11,
+  2: 9,
+  length: child
+};
+
+Array.prototype.forEach.call(obj, callbackfn);
+
+assert(testResult, 'testResult !== true');
+assert(valueOfAccessed, 'valueOfAccessed !== true');
+assert.sameValue(toStringAccessed, false, 'toStringAccessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-3-24.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-3-24.js
new file mode 100644
index 0000000000..b0f05c4b35
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-3-24.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+es5id: 15.4.4.18-3-24
+description: >
+    Array.prototype.forEach - value of 'length' is a positive
+    non-integer, ensure truncation occurs in the proper direction
+---*/
+
+var testResult = false;
+
+function callbackfn(val, idx, obj) {
+  testResult = (val > 10);
+}
+
+var obj = {
+  1: 11,
+  2: 9,
+  length: 2.685
+};
+
+Array.prototype.forEach.call(obj, callbackfn);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-3-25.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-3-25.js
new file mode 100644
index 0000000000..06371424a8
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-3-25.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+es5id: 15.4.4.18-3-25
+description: >
+    Array.prototype.forEach - value of 'length' is a negative
+    non-integer
+---*/
+
+var testResult = false;
+
+function callbackfn(val, idx, obj) {
+  testResult = (val > 10);
+}
+
+var obj = {
+  1: 11,
+  2: 9,
+  length: -4294967294.5
+};
+
+Array.prototype.forEach.call(obj, callbackfn);
+
+assert.sameValue(testResult, false, 'testResult');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-3-3.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-3-3.js
new file mode 100644
index 0000000000..19040140b5
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-3-3.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+es5id: 15.4.4.18-3-3
+description: >
+    Array.prototype.forEach - value of 'length' is a number (value is
+    0)
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+}
+
+var obj = {
+  0: 1,
+  1: 1,
+  length: 0
+};
+
+Array.prototype.forEach.call(obj, callbackfn);
+
+assert.sameValue(accessed, false, 'accessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-3-4.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-3-4.js
new file mode 100644
index 0000000000..4f57dcd698
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-3-4.js
@@ -0,0 +1,27 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+es5id: 15.4.4.18-3-4
+description: >
+    Array.prototype.forEach - value of 'length' is a number (value is
+    +0)
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+}
+
+var obj = {
+  0: 11,
+  length: +0
+};
+
+Array.prototype.forEach.call(obj, callbackfn);
+
+assert.sameValue(accessed, false, 'accessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-3-5.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-3-5.js
new file mode 100644
index 0000000000..083c6ae27f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-3-5.js
@@ -0,0 +1,27 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+es5id: 15.4.4.18-3-5
+description: >
+    Array.prototype.forEach - value of 'length' is a number (value is
+    -0)
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+}
+
+var obj = {
+  0: 11,
+  length: -0
+};
+
+Array.prototype.forEach.call(obj, callbackfn);
+
+assert.sameValue(accessed, false, 'accessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-3-6.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-3-6.js
new file mode 100644
index 0000000000..81758b3626
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-3-6.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+es5id: 15.4.4.18-3-6
+description: >
+    Array.prototype.forEach - value of 'length' is a number (value is
+    positive)
+---*/
+
+var testResult1 = false;
+
+function callbackfn(val, idx, obj) {
+  testResult1 = (val > 10);
+}
+
+var obj = {
+  1: 11,
+  2: 9,
+  length: 2
+};
+
+Array.prototype.forEach.call(obj, callbackfn);
+
+assert(testResult1, 'testResult1 !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-3-7.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-3-7.js
new file mode 100644
index 0000000000..bb62f0389b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-3-7.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+es5id: 15.4.4.18-3-7
+description: >
+    Array.prototype.forEach - value of 'length' is a number (value is
+    negative)
+---*/
+
+var testResult1 = false;
+
+function callbackfn(val, idx, obj) {
+  testResult1 = (val > 10);
+}
+
+var obj = {
+  1: 11,
+  2: 9,
+  length: -4294967294
+};
+
+Array.prototype.forEach.call(obj, callbackfn);
+
+assert.sameValue(testResult1, false, 'testResult1');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-3-9.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-3-9.js
new file mode 100644
index 0000000000..9fb4239a2a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-3-9.js
@@ -0,0 +1,27 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+es5id: 15.4.4.18-3-9
+description: >
+    Array.prototype.forEach - value of 'length' is a number (value is
+    -Infinity)
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+}
+
+var obj = {
+  0: 9,
+  length: -Infinity
+};
+
+Array.prototype.forEach.call(obj, callbackfn);
+
+assert.sameValue(accessed, false, 'accessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-4-1.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-4-1.js
new file mode 100644
index 0000000000..1d2e1adb25
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-4-1.js
@@ -0,0 +1,15 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+es5id: 15.4.4.18-4-1
+description: Array.prototype.forEach throws TypeError if callbackfn is undefined
+---*/
+
+var arr = new Array(10);
+assert.throws(TypeError, function() {
+  arr.forEach();
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-4-10.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-4-10.js
new file mode 100644
index 0000000000..4cfc18c34a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-4-10.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+es5id: 15.4.4.18-4-10
+description: >
+    Array.prototype.forEach - the exception is not thrown if exception
+    was thrown by step 2
+---*/
+
+var obj = {
+  0: 11,
+  1: 12
+};
+
+Object.defineProperty(obj, "length", {
+  get: function() {
+    throw new Test262Error();
+  },
+  configurable: true
+});
+
+assert.throws(Test262Error, function() {
+  Array.prototype.forEach.call(obj, undefined);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-4-11.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-4-11.js
new file mode 100644
index 0000000000..b1c38f7f26
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-4-11.js
@@ -0,0 +1,32 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+es5id: 15.4.4.18-4-11
+description: >
+    Array.prototype.forEach - the exception is not thrown if exception
+    was thrown by step 3
+---*/
+
+var obj = {
+  0: 11,
+  1: 12
+};
+
+Object.defineProperty(obj, "length", {
+  get: function() {
+    return {
+      toString: function() {
+        throw new Test262Error();
+      }
+    };
+  },
+  configurable: true
+});
+
+assert.throws(Test262Error, function() {
+  Array.prototype.forEach.call(obj, undefined);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-4-12.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-4-12.js
new file mode 100644
index 0000000000..7193be7253
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-4-12.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+es5id: 15.4.4.18-4-12
+description: Array.prototype.forEach - 'callbackfn' is a function
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+}
+
+[11, 9].forEach(callbackfn);
+
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-4-15.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-4-15.js
new file mode 100644
index 0000000000..1f21e7ce32
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-4-15.js
@@ -0,0 +1,39 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+es5id: 15.4.4.18-4-15
+description: >
+    Array.prototype.forEach - calling with no callbackfn is the same
+    as passing undefined for callbackfn
+---*/
+
+var obj = {
+  10: 10
+};
+var lengthAccessed = false;
+var loopAccessed = false;
+
+Object.defineProperty(obj, "length", {
+  get: function() {
+    lengthAccessed = true;
+    return 20;
+  },
+  configurable: true
+});
+
+Object.defineProperty(obj, "0", {
+  get: function() {
+    loopAccessed = true;
+    return 10;
+  },
+  configurable: true
+});
+assert.throws(TypeError, function() {
+  Array.prototype.forEach.call(obj);
+});
+assert(lengthAccessed, 'lengthAccessed !== true');
+assert.sameValue(loopAccessed, false, 'loopAccessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-4-2.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-4-2.js
new file mode 100644
index 0000000000..d2314173b8
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-4-2.js
@@ -0,0 +1,17 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+es5id: 15.4.4.18-4-2
+description: >
+    Array.prototype.forEach throws ReferenceError if callbackfn is
+    unreferenced
+---*/
+
+var arr = new Array(10);
+assert.throws(ReferenceError, function() {
+  arr.forEach(foo);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-4-3.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-4-3.js
new file mode 100644
index 0000000000..7ac0d0c314
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-4-3.js
@@ -0,0 +1,15 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+es5id: 15.4.4.18-4-3
+description: Array.prototype.forEach throws TypeError if callbackfn is null
+---*/
+
+var arr = new Array(10);
+assert.throws(TypeError, function() {
+  arr.forEach(null);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-4-4.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-4-4.js
new file mode 100644
index 0000000000..99a096fa93
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-4-4.js
@@ -0,0 +1,15 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+es5id: 15.4.4.18-4-4
+description: Array.prototype.forEach throws TypeError if callbackfn is boolean
+---*/
+
+var arr = new Array(10);
+assert.throws(TypeError, function() {
+  arr.forEach(true);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-4-5.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-4-5.js
new file mode 100644
index 0000000000..5a755627e6
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-4-5.js
@@ -0,0 +1,15 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+es5id: 15.4.4.18-4-5
+description: Array.prototype.forEach throws TypeError if callbackfn is number
+---*/
+
+var arr = new Array(10);
+assert.throws(TypeError, function() {
+  arr.forEach(5);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-4-6.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-4-6.js
new file mode 100644
index 0000000000..c4d9f4388f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-4-6.js
@@ -0,0 +1,15 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+es5id: 15.4.4.18-4-6
+description: Array.prototype.forEach throws TypeError if callbackfn is string
+---*/
+
+var arr = new Array(10);
+assert.throws(TypeError, function() {
+  arr.forEach("abc");
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-4-7.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-4-7.js
new file mode 100644
index 0000000000..300b7b9b13
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-4-7.js
@@ -0,0 +1,16 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: >
+    Array.prototype.forEach throws TypeError if callbackfn is Object
+    without Call internal method
+---*/
+
+var arr = new Array(10);
+assert.throws(TypeError, function() {
+  arr.forEach(new Object());
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-4-8.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-4-8.js
new file mode 100644
index 0000000000..7bec9f84e1
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-4-8.js
@@ -0,0 +1,30 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: >
+    Array.prototype.forEach - side effects produced by step 2 are
+    visible when an exception occurs
+---*/
+
+var obj = {
+  0: 11,
+  1: 12
+};
+
+var accessed = false;
+
+Object.defineProperty(obj, "length", {
+  get: function() {
+    accessed = true;
+    return 2;
+  },
+  configurable: true
+});
+assert.throws(TypeError, function() {
+  Array.prototype.forEach.call(obj, null);
+});
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-4-9.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-4-9.js
new file mode 100644
index 0000000000..4d9a7dc9c2
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-4-9.js
@@ -0,0 +1,34 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: >
+    Array.prototype.forEach - side effects produced by step 3 are
+    visible when an exception occurs
+---*/
+
+var obj = {
+  0: 11,
+  1: 12
+};
+
+var accessed = false;
+
+Object.defineProperty(obj, "length", {
+  get: function() {
+    return {
+      toString: function() {
+        accessed = true;
+        return "2";
+      }
+    };
+  },
+  configurable: true
+});
+assert.throws(TypeError, function() {
+  Array.prototype.forEach.call(obj, null);
+});
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-5-1-s.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-5-1-s.js
new file mode 100644
index 0000000000..8278ff7e27
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-5-1-s.js
@@ -0,0 +1,22 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: Array.prototype.forEach - thisArg not passed to strict callbackfn
+flags: [noStrict]
+---*/
+
+var innerThisCorrect = false;
+
+function callbackfn(val, idx, obj) {
+  "use strict";
+  innerThisCorrect = this === undefined;
+  return true;
+}
+
+[1].forEach(callbackfn);
+
+assert(innerThisCorrect, 'innerThisCorrect !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-5-1.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-5-1.js
new file mode 100644
index 0000000000..51cf3aa3b4
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-5-1.js
@@ -0,0 +1,24 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: Array.prototype.forEach - thisArg is passed
+flags: [noStrict]
+---*/
+
+(function() {
+  this._15_4_4_18_5_1 = false;
+  var _15_4_4_18_5_1 = true;
+  var result;
+
+  function callbackfn(val, idx, obj) {
+    result = this._15_4_4_18_5_1;
+  }
+  var arr = [1];
+  arr.forEach(callbackfn)
+
+  assert.sameValue(result, false, 'result');
+})();
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-5-10.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-5-10.js
new file mode 100644
index 0000000000..b08d9a9bbf
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-5-10.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: Array.prototype.forEach - Array Object can be used as thisArg
+---*/
+
+var result = false;
+var objArray = [];
+
+function callbackfn(val, idx, obj) {
+  result = (this === objArray);
+}
+
+[11].forEach(callbackfn, objArray);
+
+assert(result, 'result !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-5-11.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-5-11.js
new file mode 100644
index 0000000000..d8117261de
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-5-11.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: Array.prototype.forEach - String Object can be used as thisArg
+---*/
+
+var result = false;
+var objString = new String();
+
+function callbackfn(val, idx, obj) {
+  result = (this === objString);
+}
+
+[11].forEach(callbackfn, objString);
+
+assert(result, 'result !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-5-12.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-5-12.js
new file mode 100644
index 0000000000..e8f8fd0b10
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-5-12.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: Array.prototype.forEach - Boolean Object can be used as thisArg
+---*/
+
+var result = false;
+var objBoolean = new Boolean();
+
+function callbackfn(val, idx, obj) {
+  result = (this === objBoolean);
+}
+
+[11].forEach(callbackfn, objBoolean);
+
+assert(result, 'result !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-5-13.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-5-13.js
new file mode 100644
index 0000000000..ca75a95c46
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-5-13.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: Array.prototype.forEach - Number Object can be used as thisArg
+---*/
+
+var result = false;
+var objNumber = new Number();
+
+function callbackfn(val, idx, obj) {
+  result = (this === objNumber);
+}
+
+[11].forEach(callbackfn, objNumber);
+
+assert(result, 'result !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-5-14.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-5-14.js
new file mode 100644
index 0000000000..1fecc909bc
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-5-14.js
@@ -0,0 +1,19 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: Array.prototype.forEach - the Math object can be used as thisArg
+---*/
+
+var result = false;
+
+function callbackfn(val, idx, obj) {
+  result = (this === Math);
+}
+
+[11].forEach(callbackfn, Math);
+
+assert(result, 'result !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-5-15.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-5-15.js
new file mode 100644
index 0000000000..a4d1caf0f3
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-5-15.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: Array.prototype.forEach - Date Object can be used as thisArg
+---*/
+
+var result = false;
+var objDate = new Date();
+
+function callbackfn(val, idx, obj) {
+  result = (this === objDate);
+}
+
+[11].forEach(callbackfn, objDate);
+
+assert(result, 'result !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-5-16.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-5-16.js
new file mode 100644
index 0000000000..76619c117a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-5-16.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: Array.prototype.forEach - RegExp Object can be used as thisArg
+---*/
+
+var result = false;
+var objRegExp = new RegExp();
+
+function callbackfn(val, idx, obj) {
+  result = (this === objRegExp);
+}
+
+[11].forEach(callbackfn, objRegExp);
+
+assert(result, 'result !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-5-17.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-5-17.js
new file mode 100644
index 0000000000..5285ac8814
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-5-17.js
@@ -0,0 +1,19 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: Array.prototype.forEach - the JSON object can be used as thisArg
+---*/
+
+var result = false;
+
+function callbackfn(val, idx, obj) {
+  result = (this === JSON);
+}
+
+[11].forEach(callbackfn, JSON);
+
+assert(result, 'result !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-5-18.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-5-18.js
new file mode 100644
index 0000000000..a0dc54973e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-5-18.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: Array.prototype.forEach - Error Object can be used as thisArg
+---*/
+
+var result = false;
+var objError = new RangeError();
+
+function callbackfn(val, idx, obj) {
+  result = (this === objError);
+}
+
+[11].forEach(callbackfn, objError);
+
+assert(result, 'result !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-5-19.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-5-19.js
new file mode 100644
index 0000000000..85a5e1eb73
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-5-19.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: >
+    Array.prototype.forEach - the Arguments object can be used as
+    thisArg
+---*/
+
+var result = false;
+var arg;
+
+function callbackfn(val, idx, obj) {
+  result = (this === arg);
+}
+
+(function fun() {
+  arg = arguments;
+}(1, 2, 3));
+
+[11].forEach(callbackfn, arg);
+
+assert(result, 'result !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-5-2.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-5-2.js
new file mode 100644
index 0000000000..43b1b871e7
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-5-2.js
@@ -0,0 +1,24 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: Array.prototype.forEach - thisArg is Object
+---*/
+
+var res = false;
+var o = new Object();
+o.res = true;
+var result;
+
+function callbackfn(val, idx, obj)
+{
+  result = this.res;
+}
+
+var arr = [1];
+arr.forEach(callbackfn, o)
+
+assert.sameValue(result, true, 'result');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-5-21.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-5-21.js
new file mode 100644
index 0000000000..6fdb94c24f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-5-21.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: Array.prototype.forEach - the global object can be used as thisArg
+---*/
+
+var global = this;
+var result = false;
+
+function callbackfn(val, idx, obj) {
+  result = (this === global);
+}
+
+[11].forEach(callbackfn, this);
+
+assert(result, 'result !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-5-22.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-5-22.js
new file mode 100644
index 0000000000..e947218cdb
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-5-22.js
@@ -0,0 +1,19 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: Array.prototype.forEach - boolean primitive can be used as thisArg
+---*/
+
+var result = false;
+
+function callbackfn(val, idx, obj) {
+  result = (this.valueOf() === false);
+}
+
+[11].forEach(callbackfn, false);
+
+assert(result, 'result !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-5-23.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-5-23.js
new file mode 100644
index 0000000000..6a4c52b911
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-5-23.js
@@ -0,0 +1,19 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: Array.prototype.forEach - number primitive can be used as thisArg
+---*/
+
+var result = false;
+
+function callbackfn(val, idx, obj) {
+  result = (this.valueOf() === 101);
+}
+
+[11].forEach(callbackfn, 101);
+
+assert(result, 'result !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-5-24.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-5-24.js
new file mode 100644
index 0000000000..7888f3042f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-5-24.js
@@ -0,0 +1,19 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: Array.prototype.forEach - string primitive can be used as thisArg
+---*/
+
+var result = false;
+
+function callbackfn(val, idx, obj) {
+  result = (this.valueOf() === "abc");
+}
+
+[11].forEach(callbackfn, "abc");
+
+assert(result, 'result !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-5-25.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-5-25.js
new file mode 100644
index 0000000000..32ab29eaf1
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-5-25.js
@@ -0,0 +1,25 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: Array.prototype.forEach - thisArg not passed
+flags: [noStrict]
+---*/
+
+function innerObj() {
+  this._15_4_4_18_5_25 = true;
+  var _15_4_4_18_5_25 = false;
+  var result;
+
+  function callbackfn(val, idx, obj) {
+    result = this._15_4_4_18_5_25;
+  }
+  var arr = [1];
+  arr.forEach(callbackfn)
+  this.retVal = !result;
+}
+
+assert(new innerObj().retVal, 'new innerObj().retVal !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-5-3.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-5-3.js
new file mode 100644
index 0000000000..f31bf20aac
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-5-3.js
@@ -0,0 +1,24 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: Array.prototype.forEach - thisArg is Array
+---*/
+
+var res = false;
+var a = new Array();
+a.res = true;
+var result;
+
+function callbackfn(val, idx, obj)
+{
+  result = this.res;
+}
+
+var arr = [1];
+arr.forEach(callbackfn, a)
+
+assert.sameValue(result, true, 'result');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-5-4.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-5-4.js
new file mode 100644
index 0000000000..fe1ed7f8bc
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-5-4.js
@@ -0,0 +1,27 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: >
+    Array.prototype.forEach - thisArg is object from object
+    template(prototype)
+---*/
+
+var res = false;
+var result;
+
+function callbackfn(val, idx, obj)
+{
+  result = this.res;
+}
+
+function foo() {}
+foo.prototype.res = true;
+var f = new foo();
+var arr = [1];
+arr.forEach(callbackfn, f)
+
+assert.sameValue(result, true, 'result');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-5-5.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-5-5.js
new file mode 100644
index 0000000000..7ebb9bec1a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-5-5.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: Array.prototype.forEach - thisArg is object from object template
+---*/
+
+var res = false;
+var result;
+
+function callbackfn(val, idx, obj)
+{
+  result = this.res;
+}
+
+function foo() {}
+var f = new foo();
+f.res = true;
+
+var arr = [1];
+arr.forEach(callbackfn, f)
+
+assert.sameValue(result, true, 'result');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-5-6.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-5-6.js
new file mode 100644
index 0000000000..e0d807f48f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-5-6.js
@@ -0,0 +1,25 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: Array.prototype.forEach - thisArg is function
+---*/
+
+var res = false;
+var result;
+
+function callbackfn(val, idx, obj)
+{
+  result = this.res;
+}
+
+function foo() {}
+foo.res = true;
+
+var arr = [1];
+arr.forEach(callbackfn, foo)
+
+assert.sameValue(result, true, 'result');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-5-7.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-5-7.js
new file mode 100644
index 0000000000..367fef55bb
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-5-7.js
@@ -0,0 +1,19 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: Array.prototype.forEach - built-in functions can be used as thisArg
+---*/
+
+var result = false;
+
+function callbackfn(val, idx, obj) {
+  result = (this === eval);
+}
+
+[11].forEach(callbackfn, eval);
+
+assert(result, 'result !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-5-9.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-5-9.js
new file mode 100644
index 0000000000..c5dd67ec2e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-5-9.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: Array.prototype.forEach - Function Object can be used as thisArg
+---*/
+
+var result = false;
+var objString = function() {};
+
+function callbackfn(val, idx, obj) {
+  result = (this === objString);
+}
+
+[11].forEach(callbackfn, objString);
+
+assert(result, 'result !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-1.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-1.js
new file mode 100644
index 0000000000..0c29176657
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-1.js
@@ -0,0 +1,25 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: >
+    Array.prototype.forEach doesn't consider new elements added to
+    array after the call
+---*/
+
+var callCnt = 0;
+
+function callbackfn(val, idx, obj)
+{
+  callCnt++;
+  arr[2] = 3;
+  arr[5] = 6;
+}
+
+var arr = [1, 2, , 4, 5];
+arr.forEach(callbackfn);
+
+assert.sameValue(callCnt, 5, 'callCnt');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-2.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-2.js
new file mode 100644
index 0000000000..1fc9736bf3
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-2.js
@@ -0,0 +1,25 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: >
+    Array.prototype.forEach doesn't visit deleted elements in array
+    after the call
+---*/
+
+var callCnt = 0;
+
+function callbackfn(val, idx, obj)
+{
+  if (callCnt == 0)
+    delete arr[3];
+  callCnt++;
+}
+
+var arr = [1, 2, 3, 4, 5];
+arr.forEach(callbackfn)
+
+assert.sameValue(callCnt, 4, 'callCnt');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-3.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-3.js
new file mode 100644
index 0000000000..a45f1903ed
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-3.js
@@ -0,0 +1,24 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: >
+    Array.prototype.forEach doesn't visit deleted elements when
+    Array.length is decreased
+---*/
+
+var callCnt = 0;
+
+function callbackfn(val, idx, obj)
+{
+  arr.length = 3;
+  callCnt++;
+}
+
+var arr = [1, 2, 3, 4, 5];
+arr.forEach(callbackfn);
+
+assert.sameValue(callCnt, 3, 'callCnt');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-4.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-4.js
new file mode 100644
index 0000000000..28e8d05102
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-4.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: >
+    Array.prototype.forEach doesn't consider newly added elements in
+    sparse array
+---*/
+
+var callCnt = 0;
+
+function callbackfn(val, idx, obj)
+{
+  arr[1000] = 3;
+  callCnt++;
+}
+
+var arr = new Array(10);
+arr[1] = 1;
+arr[2] = 2;
+arr.forEach(callbackfn);
+
+assert.sameValue(callCnt, 2, 'callCnt');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-5.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-5.js
new file mode 100644
index 0000000000..aa7a3a8904
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-5.js
@@ -0,0 +1,27 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: >
+    Array.prototype.forEach visits deleted element in array after the
+    call when same index is also present in prototype
+---*/
+
+var callCnt = 0;
+
+function callbackfn(val, idx, obj)
+{
+  delete arr[4];
+  callCnt++;
+}
+
+Array.prototype[4] = 5;
+
+var arr = [1, 2, 3, 4, 5];
+arr.forEach(callbackfn)
+delete Array.prototype[4];
+
+assert.sameValue(callCnt, 5, 'callCnt');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-7.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-7.js
new file mode 100644
index 0000000000..18acb0f63f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-7.js
@@ -0,0 +1,25 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: >
+    Array.prototype.forEach - considers new value of elements in array
+    after the call
+---*/
+
+var result = false;
+var arr = [1, 2, 3, 4, 5];
+
+function callbackfn(val, Idx, obj) {
+  arr[4] = 6;
+  if (val >= 6) {
+    result = true;
+  }
+}
+
+arr.forEach(callbackfn);
+
+assert(result, 'result !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-8.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-8.js
new file mode 100644
index 0000000000..f51e436e8e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-8.js
@@ -0,0 +1,25 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: Array.prototype.forEach - no observable effects occur if len is 0
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+}
+
+var obj = {
+  0: 11,
+  1: 12,
+  length: 0
+};
+
+Array.prototype.forEach.call(obj, callbackfn);
+
+assert.sameValue(accessed, false, 'accessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-9.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-9.js
new file mode 100644
index 0000000000..ea7e1ad1be
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-9.js
@@ -0,0 +1,35 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: >
+    Array.prototype.forEach - modifications to length don't change
+    number of iterations
+---*/
+
+var called = 0;
+
+function callbackfn(val, idx, obj) {
+  called++;
+}
+
+var obj = {
+  1: 12,
+  2: 9,
+  length: 2
+};
+
+Object.defineProperty(obj, "0", {
+  get: function() {
+    obj.length = 3;
+    return 11;
+  },
+  configurable: true
+});
+
+Array.prototype.forEach.call(obj, callbackfn);
+
+assert.sameValue(called, 2, 'called');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-b-1.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-b-1.js
new file mode 100644
index 0000000000..70ea37fdaf
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-b-1.js
@@ -0,0 +1,24 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: >
+    Array.prototype.forEach - callbackfn not called for indexes never
+    been assigned values
+---*/
+
+var callCnt = 0;
+
+function callbackfn(val, idx, obj)
+{
+  callCnt++;
+}
+
+var arr = new Array(10);
+arr[1] = undefined;
+arr.forEach(callbackfn);
+
+assert.sameValue(callCnt, 1, 'callCnt');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-b-10.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-b-10.js
new file mode 100644
index 0000000000..ac9a9d81d3
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-b-10.js
@@ -0,0 +1,40 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: >
+    Array.prototype.forEach - deleting property of prototype causes
+    prototype index property not to be visited on an Array-like Object
+---*/
+
+var accessed = false;
+var testResult = true;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  if (idx === 3) {
+    testResult = false;
+  }
+}
+
+var obj = {
+  2: 2,
+  length: 20
+};
+
+Object.defineProperty(obj, "0", {
+  get: function() {
+    delete Object.prototype[1];
+    return 0;
+  },
+  configurable: true
+});
+
+Object.prototype[1] = 1;
+Array.prototype.forEach.call(obj, callbackfn);
+
+assert(testResult, 'testResult !== true');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-b-11.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-b-11.js
new file mode 100644
index 0000000000..e0d9dfd150
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-b-11.js
@@ -0,0 +1,37 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: >
+    Array.prototype.forEach - deleting property of prototype causes
+    prototype index property not to be visited on an Array
+---*/
+
+var accessed = false;
+var testResult = true;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  if (idx === 1) {
+    testResult = false;
+  }
+}
+
+var arr = [0, , ];
+
+Object.defineProperty(arr, "0", {
+  get: function() {
+    delete Array.prototype[1];
+    return 0;
+  },
+  configurable: true
+});
+
+Array.prototype[1] = 1;
+arr.forEach(callbackfn);
+
+assert(testResult, 'testResult !== true');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-b-12.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-b-12.js
new file mode 100644
index 0000000000..38910365bd
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-b-12.js
@@ -0,0 +1,39 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: >
+    Array.prototype.forEach - deleting own property with prototype
+    property causes prototype index property to be visited on an
+    Array-like object
+---*/
+
+var testResult = false;
+
+function callbackfn(val, idx, obj) {
+  if (idx === 1 && val === 1) {
+    testResult = true;
+  }
+}
+
+var obj = {
+  0: 0,
+  1: 111,
+  length: 10
+};
+
+Object.defineProperty(obj, "0", {
+  get: function() {
+    delete obj[1];
+    return 0;
+  },
+  configurable: true
+});
+
+Object.prototype[1] = 1;
+Array.prototype.forEach.call(obj, callbackfn);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-b-13.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-b-13.js
new file mode 100644
index 0000000000..cf28d94eba
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-b-13.js
@@ -0,0 +1,33 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: >
+    Array.prototype.forEach - deleting own property with prototype
+    property causes prototype index property to be visited on an Array
+---*/
+
+var testResult = false;
+
+function callbackfn(val, idx, obj) {
+  if (idx === 1 && val === 1) {
+    testResult = true;
+  }
+}
+var arr = [0, 111];
+
+Object.defineProperty(arr, "0", {
+  get: function() {
+    delete arr[1];
+    return 0;
+  },
+  configurable: true
+});
+
+Array.prototype[1] = 1;
+arr.forEach(callbackfn);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-b-14.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-b-14.js
new file mode 100644
index 0000000000..d2f5569cd6
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-b-14.js
@@ -0,0 +1,36 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: >
+    Array.prototype.forEach - decreasing length of array causes index
+    property not to be visited
+---*/
+
+var accessed = false;
+var testResult = true;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  if (idx === 3) {
+    testResult = false;
+  }
+}
+
+var arr = [0, 1, 2, "last"];
+
+Object.defineProperty(arr, "0", {
+  get: function() {
+    arr.length = 3;
+    return 0;
+  },
+  configurable: true
+});
+
+arr.forEach(callbackfn);
+
+assert(testResult, 'testResult !== true');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-b-15.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-b-15.js
new file mode 100644
index 0000000000..f62b2ac9ad
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-b-15.js
@@ -0,0 +1,39 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: >
+    Array.prototype.forEach - decreasing length of array with
+    prototype property causes prototype index property to be visited
+---*/
+
+var testResult = false;
+
+function callbackfn(val, idx, obj) {
+  if (idx === 2 && val === "prototype") {
+    testResult = true;
+  }
+}
+var arr = [0, 1, 2];
+
+Object.defineProperty(Array.prototype, "2", {
+  get: function() {
+    return "prototype";
+  },
+  configurable: true
+});
+
+Object.defineProperty(arr, "1", {
+  get: function() {
+    arr.length = 2;
+    return 1;
+  },
+  configurable: true
+});
+
+arr.forEach(callbackfn);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-b-16.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-b-16.js
new file mode 100644
index 0000000000..f29cfd513a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-b-16.js
@@ -0,0 +1,41 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: >
+    Array.prototype.forEach - decreasing length of array does not
+    delete non-configurable properties
+flags: [noStrict]
+---*/
+
+var testResult = false;
+
+function callbackfn(val, idx, obj) {
+  if (idx === 2 && val === "unconfigurable") {
+    testResult = true;
+  }
+}
+
+var arr = [0, 1, 2];
+
+Object.defineProperty(arr, "2", {
+  get: function() {
+    return "unconfigurable";
+  },
+  configurable: false
+});
+
+Object.defineProperty(arr, "1", {
+  get: function() {
+    arr.length = 2;
+    return 1;
+  },
+  configurable: true
+});
+
+arr.forEach(callbackfn);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-b-2.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-b-2.js
new file mode 100644
index 0000000000..abf2a576a3
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-b-2.js
@@ -0,0 +1,33 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: >
+    Array.prototype.forEach - added properties in step 2 are visible
+    here
+---*/
+
+var testResult = false;
+
+function callbackfn(val, idx, obj) {
+  if (idx === 2 && val === "length") {
+    testResult = true;
+  }
+}
+
+var obj = {};
+
+Object.defineProperty(obj, "length", {
+  get: function() {
+    obj[2] = "length";
+    return 3;
+  },
+  configurable: true
+});
+
+Array.prototype.forEach.call(obj, callbackfn);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-b-3.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-b-3.js
new file mode 100644
index 0000000000..8e0f1cc5f0
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-b-3.js
@@ -0,0 +1,38 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: >
+    Array.prototype.forEach - deleted properties in step 2 are visible
+    here
+---*/
+
+var accessed = false;
+var testResult = true;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  if (idx === 8) {
+    testResult = false;
+  }
+}
+var obj = {
+  2: 6.99,
+  8: 19
+};
+
+Object.defineProperty(obj, "length", {
+  get: function() {
+    delete obj[8];
+    return 10;
+  },
+  configurable: true
+});
+
+Array.prototype.forEach.call(obj, callbackfn);
+
+assert(testResult, 'testResult !== true');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-b-4.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-b-4.js
new file mode 100644
index 0000000000..adcf620909
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-b-4.js
@@ -0,0 +1,40 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: >
+    Array.prototype.forEach - properties added into own object after
+    current position are visited on an Array-like object
+---*/
+
+var testResult = false;
+
+function callbackfn(val, idx, obj) {
+  if (idx === 1 && val === 1) {
+    testResult = true;
+  }
+}
+
+var obj = {
+  length: 2
+};
+
+Object.defineProperty(obj, "0", {
+  get: function() {
+    Object.defineProperty(obj, "1", {
+      get: function() {
+        return 1;
+      },
+      configurable: true
+    });
+    return 0;
+  },
+  configurable: true
+});
+
+Array.prototype.forEach.call(obj, callbackfn);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-b-5.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-b-5.js
new file mode 100644
index 0000000000..d655dd4446
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-b-5.js
@@ -0,0 +1,38 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: >
+    Array.prototype.forEach - properties added into own object after
+    current position are visited on an Array
+---*/
+
+var testResult = false;
+
+function callbackfn(val, idx, obj) {
+  if (idx === 1 && val === 1) {
+    testResult = true;
+  }
+}
+
+var arr = [0, , 2];
+
+Object.defineProperty(arr, "0", {
+  get: function() {
+    Object.defineProperty(arr, "1", {
+      get: function() {
+        return 1;
+      },
+      configurable: true
+    });
+    return 0;
+  },
+  configurable: true
+});
+
+arr.forEach(callbackfn);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-b-6.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-b-6.js
new file mode 100644
index 0000000000..1d2e41de3d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-b-6.js
@@ -0,0 +1,40 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: >
+    Array.prototype.forEach - properties can be added to prototype
+    after current position are visited on an Array-like object
+---*/
+
+var testResult = false;
+
+function callbackfn(val, idx, obj) {
+  if (idx === 1 && val === 6.99) {
+    testResult = true;
+  }
+}
+
+var obj = {
+  length: 2
+};
+
+Object.defineProperty(obj, "0", {
+  get: function() {
+    Object.defineProperty(Object.prototype, "1", {
+      get: function() {
+        return 6.99;
+      },
+      configurable: true
+    });
+    return 0;
+  },
+  configurable: true
+});
+
+Array.prototype.forEach.call(obj, callbackfn);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-b-7.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-b-7.js
new file mode 100644
index 0000000000..7763aba2ec
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-b-7.js
@@ -0,0 +1,38 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: >
+    Array.prototype.forEach - properties can be added to prototype
+    after current position are visited on an Array
+---*/
+
+var testResult = false;
+
+function callbackfn(val, idx, obj) {
+  if (idx === 1 && val === 6.99) {
+    testResult = true;
+  }
+}
+
+var arr = [0, , 2];
+
+Object.defineProperty(arr, "0", {
+  get: function() {
+    Object.defineProperty(Array.prototype, "1", {
+      get: function() {
+        return 6.99;
+      },
+      configurable: true
+    });
+    return 0;
+  },
+  configurable: true
+});
+
+arr.forEach(callbackfn);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-b-8.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-b-8.js
new file mode 100644
index 0000000000..9a9280f206
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-b-8.js
@@ -0,0 +1,45 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: >
+    Array.prototype.forEach - deleting own property causes index
+    property not to be visited on an Array-like object
+---*/
+
+var accessed = false;
+var testResult = true;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  if (idx === 1) {
+    testResult = false;
+  }
+}
+
+var obj = {
+  length: 2
+};
+
+Object.defineProperty(obj, "1", {
+  get: function() {
+    return 6.99;
+  },
+  configurable: true
+});
+
+Object.defineProperty(obj, "0", {
+  get: function() {
+    delete obj[1];
+    return 0;
+  },
+  configurable: true
+});
+
+Array.prototype.forEach.call(obj, callbackfn);
+
+assert(testResult, 'testResult !== true');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-b-9.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-b-9.js
new file mode 100644
index 0000000000..87215222d1
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-b-9.js
@@ -0,0 +1,43 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: >
+    Array.prototype.forEach - deleting own property causes index
+    property not to be visited on an Array
+---*/
+
+var accessed = false;
+var testResult = true;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  if (idx === 1) {
+    testResult = false;
+  }
+}
+
+var arr = [1, 2];
+
+Object.defineProperty(arr, "1", {
+  get: function() {
+    return "6.99";
+  },
+  configurable: true
+});
+
+Object.defineProperty(arr, "0", {
+  get: function() {
+    delete arr[1];
+    return 0;
+  },
+  configurable: true
+});
+
+arr.forEach(callbackfn);
+
+assert(testResult, 'testResult !== true');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-i-1.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-i-1.js
new file mode 100644
index 0000000000..2429652961
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-i-1.js
@@ -0,0 +1,29 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: >
+    Array.prototype.forEach - element to be retrieved is own data
+    property on an Array-like object
+---*/
+
+var kValue = {};
+var testResult = false;
+
+function callbackfn(val, idx, obj) {
+  if (idx === 5) {
+    testResult = (val === kValue);
+  }
+}
+
+var obj = {
+  5: kValue,
+  length: 100
+};
+
+Array.prototype.forEach.call(obj, callbackfn);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-i-10.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-i-10.js
new file mode 100644
index 0000000000..bb272475be
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-i-10.js
@@ -0,0 +1,32 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: >
+    Array.prototype.forEach - element to be retrieved is own accessor
+    property on an Array
+---*/
+
+var testResult = false;
+
+function callbackfn(val, idx, obj) {
+  if (idx === 2) {
+    testResult = (val === 12);
+  }
+}
+
+var arr = [];
+
+Object.defineProperty(arr, "2", {
+  get: function() {
+    return 12;
+  },
+  configurable: true
+});
+
+arr.forEach(callbackfn);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-i-11.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-i-11.js
new file mode 100644
index 0000000000..18dc9af824
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-i-11.js
@@ -0,0 +1,41 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: >
+    Array.prototype.forEach - element to be retrieved is own accessor
+    property that overrides an inherited data property on an
+    Array-like object
+---*/
+
+var testResult = false;
+
+function callbackfn(val, idx, obj) {
+  if (idx === 0) {
+    testResult = (val === 11);
+  }
+}
+
+var proto = {
+  0: 5
+};
+
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+child.length = 10;
+
+Object.defineProperty(child, "0", {
+  get: function() {
+    return 11;
+  },
+  configurable: true
+});
+
+Array.prototype.forEach.call(child, callbackfn);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-i-12.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-i-12.js
new file mode 100644
index 0000000000..5b34577fdf
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-i-12.js
@@ -0,0 +1,34 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: >
+    Array.prototype.forEach - element to be retrieved is own accessor
+    property that overrides an inherited data property on an Array
+---*/
+
+var testResult = false;
+
+function callbackfn(val, idx, obj) {
+  if (idx === 0) {
+    testResult = (val === 111);
+  }
+}
+
+var arr = [];
+
+Array.prototype[0] = 10;
+
+Object.defineProperty(arr, "0", {
+  get: function() {
+    return 111;
+  },
+  configurable: true
+});
+
+arr.forEach(callbackfn);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-i-13.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-i-13.js
new file mode 100644
index 0000000000..7fb479567f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-i-13.js
@@ -0,0 +1,47 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: >
+    Array.prototype.forEach - element to be retrieved is own accessor
+    property that overrides an inherited accessor property on an
+    Array-like object
+---*/
+
+var testResult = false;
+
+function callbackfn(val, idx, obj) {
+  if (idx === 1) {
+    testResult = (val === 12);
+  }
+}
+
+var proto = {};
+
+Object.defineProperty(proto, "1", {
+  get: function() {
+    return 6;
+  },
+  configurable: true
+});
+
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+child.length = 10;
+
+Object.defineProperty(child, "1", {
+  get: function() {
+    return 12;
+  },
+  configurable: true
+});
+
+
+Array.prototype.forEach.call(child, callbackfn);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-i-14.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-i-14.js
new file mode 100644
index 0000000000..080e5935e6
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-i-14.js
@@ -0,0 +1,39 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: >
+    Array.prototype.forEach - element to be retrieved is own accessor
+    property that overrides an inherited accessor property on an Array
+---*/
+
+var testResult = false;
+
+function callbackfn(val, idx, obj) {
+  if (idx === 0) {
+    testResult = (val === 11);
+  }
+}
+
+var arr = [];
+
+Object.defineProperty(Array.prototype, "0", {
+  get: function() {
+    return 5;
+  },
+  configurable: true
+});
+
+Object.defineProperty(arr, "0", {
+  get: function() {
+    return 11;
+  },
+  configurable: true
+});
+
+arr.forEach(callbackfn);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-i-15.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-i-15.js
new file mode 100644
index 0000000000..5740ee349d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-i-15.js
@@ -0,0 +1,38 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: >
+    Array.prototype.forEach - element to be retrieved is inherited
+    accessor property on an Array-like object
+---*/
+
+var testResult = false;
+
+function callbackfn(val, idx, obj) {
+  if (idx === 1) {
+    testResult = (val === 11);
+  }
+}
+
+var proto = {};
+
+Object.defineProperty(proto, "1", {
+  get: function() {
+    return 11;
+  },
+  configurable: true
+});
+
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+child.length = 20;
+
+Array.prototype.forEach.call(child, callbackfn);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-i-16.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-i-16.js
new file mode 100644
index 0000000000..ea98a4d6b0
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-i-16.js
@@ -0,0 +1,30 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: >
+    Array.prototype.forEach - element to be retrieved is inherited
+    accessor property on an Array
+---*/
+
+var testResult = false;
+
+function callbackfn(val, idx, obj) {
+  if (idx === 0) {
+    testResult = (val === 11);
+  }
+}
+
+Object.defineProperty(Array.prototype, "0", {
+  get: function() {
+    return 11;
+  },
+  configurable: true
+});
+
+[, , , ].forEach(callbackfn);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-i-17.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-i-17.js
new file mode 100644
index 0000000000..d9bf6b0a33
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-i-17.js
@@ -0,0 +1,31 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: >
+    Array.prototype.forEach - element to be retrieved is own accessor
+    property without a get function on an Array-like object
+---*/
+
+var testResult = false;
+
+function callbackfn(val, idx, obj) {
+  if (idx === 1) {
+    testResult = (typeof val === "undefined");
+  }
+}
+
+var obj = {
+  length: 2
+};
+Object.defineProperty(obj, "1", {
+  set: function() {},
+  configurable: true
+});
+
+Array.prototype.forEach.call(obj, callbackfn);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-i-18.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-i-18.js
new file mode 100644
index 0000000000..88a693c4cf
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-i-18.js
@@ -0,0 +1,30 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: >
+    Array.prototype.forEach - element to be retrieved is own accessor
+    property without a get function on an Array
+---*/
+
+var testResult = false;
+
+function callbackfn(val, idx, obj) {
+  if (idx === 0) {
+    testResult = (typeof val === "undefined");
+  }
+}
+
+var arr = [];
+
+Object.defineProperty(arr, "0", {
+  set: function() {},
+  configurable: true
+});
+
+arr.forEach(callbackfn);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-i-19.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-i-19.js
new file mode 100644
index 0000000000..9f1fef59e9
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-i-19.js
@@ -0,0 +1,40 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: >
+    Array.prototype.forEach - element to be retrieved is own accessor
+    property without a get function that overrides an inherited
+    accessor property on an Array-like object
+---*/
+
+var testResult = false;
+
+function callbackfn(val, idx, obj) {
+  if (idx === 1) {
+    testResult = (typeof val === "undefined");
+  }
+}
+
+var obj = {
+  length: 2
+};
+
+Object.defineProperty(obj, "1", {
+  set: function() {},
+  configurable: true
+});
+
+Object.defineProperty(Object.prototype, "1", {
+  get: function() {
+    return 10;
+  },
+  configurable: true
+});
+
+Array.prototype.forEach.call(obj, callbackfn);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-i-2.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-i-2.js
new file mode 100644
index 0000000000..c4e3437176
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-i-2.js
@@ -0,0 +1,23 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: >
+    Array.prototype.forEach - element to be retrieved is own data
+    property on an Array
+---*/
+
+var testResult = false;
+
+function callbackfn(val, idx, obj) {
+  if (idx === 0) {
+    testResult = (val === 11);
+  }
+}
+
+[11].forEach(callbackfn);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-i-20.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-i-20.js
new file mode 100644
index 0000000000..bc7eece0d0
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-i-20.js
@@ -0,0 +1,38 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: >
+    Array.prototype.forEach - element to be retrieved is own accessor
+    property without a get function that overrides an inherited
+    accessor property on an Array
+---*/
+
+var testResult = false;
+
+function callbackfn(val, idx, obj) {
+  if (idx === 0) {
+    testResult = (typeof val === "undefined");
+  }
+}
+
+var arr = [];
+
+Object.defineProperty(arr, "0", {
+  set: function() {},
+  configurable: true
+});
+
+Object.defineProperty(Array.prototype, "0", {
+  get: function() {
+    return 100;
+  },
+  configurable: true
+});
+
+arr.forEach(callbackfn);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-i-21.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-i-21.js
new file mode 100644
index 0000000000..65b1578f4b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-i-21.js
@@ -0,0 +1,35 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: >
+    Array.prototype.forEach - element to be retrieved is inherited
+    accessor property without a get function on an Array-like object
+---*/
+
+var testResult = false;
+
+function callbackfn(val, idx, obj) {
+  if (idx === 1) {
+    testResult = (typeof val === "undefined");
+  }
+}
+
+var proto = {};
+Object.defineProperty(proto, "1", {
+  set: function() {},
+  configurable: true
+});
+
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+child.length = 2;
+
+Array.prototype.forEach.call(child, callbackfn);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-i-22.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-i-22.js
new file mode 100644
index 0000000000..030984b6ae
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-i-22.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: >
+    Array.prototype.forEach - element to be retrieved is inherited
+    accessor property without a get function on an Array
+---*/
+
+var testResult = false;
+
+function callbackfn(val, idx, obj) {
+  if (idx === 0) {
+    testResult = (typeof val === "undefined");
+  }
+}
+
+Object.defineProperty(Array.prototype, "0", {
+  set: function() {},
+  configurable: true
+});
+
+[, 1].forEach(callbackfn);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-i-25.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-i-25.js
new file mode 100644
index 0000000000..4bc4a559d2
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-i-25.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: >
+    Array.prototype.forEach - This object is the Arguments object
+    which implements its own property get method (number of arguments
+    is less than number of parameters)
+---*/
+
+var testResult = false;
+
+function callbackfn(val, idx, obj) {
+  if (idx === 0) {
+    testResult = (val === 11);
+  }
+}
+
+var func = function(a, b) {
+  return Array.prototype.forEach.call(arguments, callbackfn);
+};
+
+func(11);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-i-26.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-i-26.js
new file mode 100644
index 0000000000..ad057763a6
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-i-26.js
@@ -0,0 +1,37 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: >
+    Array.prototype.forEach - This object is the Arguments object
+    which implements its own property get method (number of arguments
+    equals number of parameters)
+---*/
+
+var called = 0;
+var testResult = false;
+
+function callbackfn(val, idx, obj) {
+  called++;
+  if (called !== 1 && !testResult) {
+    return;
+  }
+  if (idx === 0) {
+    testResult = (val === 11);
+  } else if (idx === 1) {
+    testResult = (val === 9);
+  } else {
+    testResult = false;
+  }
+}
+
+var func = function(a, b) {
+  Array.prototype.forEach.call(arguments, callbackfn);
+};
+
+func(11, 9);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-i-27.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-i-27.js
new file mode 100644
index 0000000000..df73d8e952
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-i-27.js
@@ -0,0 +1,39 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: >
+    Array.prototype.forEach - This object is the Arguments object
+    which implements its own property get method (number of arguments
+    is greater than number of parameters)
+---*/
+
+var called = 0;
+var testResult = false;
+
+function callbackfn(val, idx, obj) {
+  called++;
+  if (called !== 1 && !testResult) {
+    return;
+  }
+  if (idx === 0) {
+    testResult = (val === 11);
+  } else if (idx === 1) {
+    testResult = (val === 12);
+  } else if (idx === 2) {
+    testResult = (val === 9);
+  } else {
+    testResult = false;
+  }
+}
+
+var func = function(a, b) {
+  return Array.prototype.forEach.call(arguments, callbackfn);
+};
+
+func(11, 12, 9);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-i-28.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-i-28.js
new file mode 100644
index 0000000000..abc425cba1
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-i-28.js
@@ -0,0 +1,44 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: >
+    Array.prototype.forEach - element changed by getter on previous
+    iterations is observed on an Array
+---*/
+
+var preIterVisible = false;
+var arr = [];
+var testResult = false;
+
+function callbackfn(val, idx, obj) {
+  if (idx === 1) {
+    testResult = (val === 9);
+  }
+}
+
+Object.defineProperty(arr, "0", {
+  get: function() {
+    preIterVisible = true;
+    return 11;
+  },
+  configurable: true
+});
+
+Object.defineProperty(arr, "1", {
+  get: function() {
+    if (preIterVisible) {
+      return 9;
+    } else {
+      return 13;
+    }
+  },
+  configurable: true
+});
+
+arr.forEach(callbackfn);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-i-29.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-i-29.js
new file mode 100644
index 0000000000..9305183494
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-i-29.js
@@ -0,0 +1,46 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: >
+    Array.prototype.forEach - element changed by getter on previous
+    iterations is observed on an Array-like object
+---*/
+
+var preIterVisible = false;
+var obj = {
+  length: 2
+};
+var testResult = false;
+
+function callbackfn(val, idx, obj) {
+  if (idx === 1) {
+    testResult = (val === 9);
+  }
+}
+
+Object.defineProperty(obj, "0", {
+  get: function() {
+    preIterVisible = true;
+    return 11;
+  },
+  configurable: true
+});
+
+Object.defineProperty(obj, "1", {
+  get: function() {
+    if (preIterVisible) {
+      return 9;
+    } else {
+      return 13;
+    }
+  },
+  configurable: true
+});
+
+Array.prototype.forEach.call(obj, callbackfn);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-i-3.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-i-3.js
new file mode 100644
index 0000000000..452169dd64
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-i-3.js
@@ -0,0 +1,35 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: >
+    Array.prototype.forEach - element to be retrieved is own data
+    property that overrides an inherited data property on an Array
+---*/
+
+var kValue = "abc";
+var testResult = false;
+
+function callbackfn(val, idx, obj) {
+  if (idx === 5) {
+    testResult = (val === kValue);
+  }
+}
+
+var proto = {
+  5: 100
+};
+
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+child[5] = kValue;
+child.length = 10;
+
+Array.prototype.forEach.call(child, callbackfn);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-i-30.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-i-30.js
new file mode 100644
index 0000000000..a5f13d4a8f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-i-30.js
@@ -0,0 +1,44 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: >
+    Array.prototype.forEach - unnhandled exceptions happened in getter
+    terminate iteration on an Array-like object
+---*/
+
+var obj = {
+  0: 11,
+  5: 10,
+  10: 8,
+  length: 20
+};
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  if (idx > 1) {
+    accessed = true;
+  }
+}
+
+Object.defineProperty(obj, "1", {
+  get: function() {
+    throw new RangeError("unhandle exception happened in getter");
+  },
+  configurable: true
+});
+
+Object.defineProperty(obj, "2", {
+  get: function() {
+    accessed = true;
+    return 100;
+  },
+  configurable: true
+});
+assert.throws(RangeError, function() {
+  Array.prototype.forEach.call(obj, callbackfn);
+});
+assert.sameValue(accessed, false, 'accessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-i-31.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-i-31.js
new file mode 100644
index 0000000000..ff02a77f42
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-i-31.js
@@ -0,0 +1,42 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: >
+    Array.prototype.forEach - unnhandled exceptions happened in getter
+    terminate iteration on an Array-like object
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  if (idx > 1) {
+    accessed = true;
+  }
+}
+
+var arr = [];
+arr[5] = 10;
+arr[10] = 100;
+
+Object.defineProperty(arr, "1", {
+  get: function() {
+    throw new RangeError("unhandle exception happened in getter");
+  },
+  configurable: true
+});
+
+Object.defineProperty(arr, "2", {
+  get: function() {
+    accessed = true;
+    return 100;
+  },
+  configurable: true
+});
+assert.throws(RangeError, function() {
+  arr.forEach(callbackfn);
+});
+assert.sameValue(accessed, false, 'accessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-i-4.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-i-4.js
new file mode 100644
index 0000000000..77723a140d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-i-4.js
@@ -0,0 +1,25 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: >
+    Array.prototype.forEach - element to be retrieved is own data
+    property that overrides an inherited data property on an Array
+---*/
+
+var testResult = false;
+
+function callbackfn(val, idx, obj) {
+  if (idx === 0) {
+    testResult = (val === 12);
+  }
+}
+
+Array.prototype[0] = 11;
+
+[12].forEach(callbackfn);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-i-5.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-i-5.js
new file mode 100644
index 0000000000..28cd165e2f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-i-5.js
@@ -0,0 +1,43 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: >
+    Array.prototype.forEach - element to be retrieved is own data
+    property that overrides an inherited accessor property on an
+    Array-like object
+---*/
+
+var testResult = false;
+
+function callbackfn(val, idx, obj) {
+  if (idx === 0) {
+    testResult = (val === 11);
+  }
+}
+
+var proto = {};
+
+Object.defineProperty(proto, "0", {
+  get: function() {
+    return 5;
+  },
+  configurable: true
+});
+
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+child.length = 2;
+Object.defineProperty(child, "0", {
+  value: 11,
+  configurable: true
+});
+
+Array.prototype.forEach.call(child, callbackfn);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-i-6.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-i-6.js
new file mode 100644
index 0000000000..ac934eb873
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-i-6.js
@@ -0,0 +1,30 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: >
+    Array.prototype.forEach - element to be retrieved is own data
+    property that overrides an inherited accessor property on an Array
+---*/
+
+var testResult = false;
+
+function callbackfn(val, idx, obj) {
+  if (idx === 0) {
+    testResult = (val === 11);
+  }
+}
+
+Object.defineProperty(Array.prototype, "0", {
+  get: function() {
+    return 9;
+  },
+  configurable: true
+});
+
+[11].forEach(callbackfn);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-i-7.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-i-7.js
new file mode 100644
index 0000000000..0305cacd69
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-i-7.js
@@ -0,0 +1,34 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: >
+    Array.prototype.forEach - element to be retrieved is inherited
+    data property on an Array-like object
+---*/
+
+var kValue = 'abc';
+var testResult = false;
+
+function callbackfn(val, idx, obj) {
+  if (idx === 5) {
+    testResult = (val === kValue);
+  }
+}
+
+var proto = {
+  5: kValue
+};
+
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+child.length = 10;
+
+Array.prototype.forEach.call(child, callbackfn);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-i-8.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-i-8.js
new file mode 100644
index 0000000000..dc0ec1d057
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-i-8.js
@@ -0,0 +1,25 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: >
+    Array.prototype.forEach - element to be retrieved is inherited
+    data property on an Array
+---*/
+
+var testResult = false;
+
+function callbackfn(val, idx, obj) {
+  if (idx === 1) {
+    testResult = (val === 13);
+  }
+}
+
+Array.prototype[1] = 13;
+
+[, , , ].forEach(callbackfn);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-i-9.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-i-9.js
new file mode 100644
index 0000000000..9d1965e41e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-i-9.js
@@ -0,0 +1,35 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: >
+    Array.prototype.forEach - element to be retrieved is own accessor
+    property on an Array-like object
+---*/
+
+var testResult = false;
+
+function callbackfn(val, idx, obj) {
+  if (idx === 0) {
+    testResult = (val === 11);
+  }
+}
+
+var obj = {
+  10: 10,
+  length: 20
+};
+
+Object.defineProperty(obj, "0", {
+  get: function() {
+    return 11;
+  },
+  configurable: true
+});
+
+Array.prototype.forEach.call(obj, callbackfn);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-ii-1.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-ii-1.js
new file mode 100644
index 0000000000..1f3b53eb79
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-ii-1.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: Array.prototype.forEach - callbackfn called with correct parameters
+---*/
+
+var bPar = true;
+var bCalled = false;
+
+function callbackfn(val, idx, obj)
+{
+  bCalled = true;
+  if (obj[idx] !== val)
+    bPar = false;
+}
+
+var arr = [0, 1, true, null, new Object(), "five"];
+arr[999999] = -6.6;
+arr.forEach(callbackfn);
+
+assert.sameValue(bCalled, true, 'bCalled');
+assert.sameValue(bPar, true, 'bPar');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-ii-10.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-ii-10.js
new file mode 100644
index 0000000000..99217f9bf4
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-ii-10.js
@@ -0,0 +1,21 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: >
+    Array.prototype.forEach - callbackfn is called with 1 formal
+    parameter
+---*/
+
+var result = false;
+
+function callbackfn(val) {
+  result = (val > 10);
+}
+
+[11].forEach(callbackfn);
+
+assert(result, 'result !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-ii-11.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-ii-11.js
new file mode 100644
index 0000000000..a1a127ca15
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-ii-11.js
@@ -0,0 +1,21 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: >
+    Array.prototype.forEach - callbackfn is called with 2 formal
+    parameter
+---*/
+
+var result = false;
+
+function callbackfn(val, idx) {
+  result = (val > 10 && arguments[2][idx] === val);
+}
+
+[11].forEach(callbackfn);
+
+assert(result, 'result !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-ii-12.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-ii-12.js
new file mode 100644
index 0000000000..fb47d7acd2
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-ii-12.js
@@ -0,0 +1,21 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: >
+    Array.prototype.forEach - callbackfn is called with 3 formal
+    parameter
+---*/
+
+var result = false;
+
+function callbackfn(val, idx, obj) {
+  result = (val > 10 && obj[idx] === val);
+}
+
+[11].forEach(callbackfn);
+
+assert(result, 'result !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-ii-13.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-ii-13.js
new file mode 100644
index 0000000000..086f238342
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-ii-13.js
@@ -0,0 +1,19 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: Array.prototype.forEach - callbackfn that uses arguments
+---*/
+
+var result = false;
+
+function callbackfn() {
+  result = (arguments[2][arguments[1]] === arguments[0]);
+}
+
+[11].forEach(callbackfn);
+
+assert(result, 'result !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-ii-16.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-ii-16.js
new file mode 100644
index 0000000000..a7c21f463c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-ii-16.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: >
+    Array.prototype.forEach - 'this' of 'callbackfn' is a Boolean
+    object when T is not an object (T is a boolean)
+---*/
+
+var result = false;
+
+function callbackfn(val, idx, obj) {
+  result = (this.valueOf() !== false);
+}
+
+var obj = {
+  0: 11,
+  length: 2
+};
+
+Array.prototype.forEach.call(obj, callbackfn, false);
+
+assert.sameValue(result, false, 'result');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-ii-17.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-ii-17.js
new file mode 100644
index 0000000000..2e7607e51c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-ii-17.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: >
+    Array.prototype.forEach - 'this' of 'callbackfn' is a Number
+    object when T is not an object (T is a number)
+---*/
+
+var result = false;
+
+function callbackfn(val, idx, o) {
+  result = (5 === this.valueOf());
+}
+
+var obj = {
+  0: 11,
+  length: 2
+};
+
+Array.prototype.forEach.call(obj, callbackfn, 5);
+
+assert(result, 'result !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-ii-18.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-ii-18.js
new file mode 100644
index 0000000000..cf17e5b042
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-ii-18.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: >
+    Array.prototype.forEach - 'this' of 'callbackfn' is an String
+    object when T is not an object (T is a string)
+---*/
+
+var result = false;
+
+function callbackfn(val, idx, obj) {
+  result = ('hello' === this.valueOf());
+}
+
+var obj = {
+  0: 11,
+  length: 2
+};
+
+Array.prototype.forEach.call(obj, callbackfn, "hello");
+
+assert(result, 'result !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-ii-19.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-ii-19.js
new file mode 100644
index 0000000000..245fc6dace
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-ii-19.js
@@ -0,0 +1,31 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: Array.prototype.forEach - non-indexed properties are not called
+---*/
+
+var accessed = false;
+var result = true;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  if (val === 8) {
+    result = false;
+  }
+}
+
+var obj = {
+  0: 11,
+  10: 12,
+  non_index_property: 8,
+  length: 20
+};
+
+Array.prototype.forEach.call(obj, callbackfn);
+
+assert(result, 'result !== true');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-ii-2.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-ii-2.js
new file mode 100644
index 0000000000..2e5856e588
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-ii-2.js
@@ -0,0 +1,25 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: Array.prototype.forEach - callbackfn takes 3 arguments
+---*/
+
+var parCnt = 3;
+var bCalled = false
+
+function callbackfn(val, idx, obj)
+{
+  bCalled = true;
+  if (arguments.length !== 3)
+    parCnt = arguments.length; //verify if callbackfn was called with 3 parameters
+}
+
+var arr = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9];
+arr.forEach(callbackfn);
+
+assert.sameValue(bCalled, true, 'bCalled');
+assert.sameValue(parCnt, 3, 'parCnt');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-ii-20.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-ii-20.js
new file mode 100644
index 0000000000..e496519e96
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-ii-20.js
@@ -0,0 +1,30 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: >
+    Array.prototype.forEach - callbackfn called with correct
+    parameters (thisArg is correct)
+---*/
+
+var result = false;
+
+function callbackfn(val, idx, obj) {
+  result = (10 === this.threshold);
+}
+
+var thisArg = {
+  threshold: 10
+};
+
+var obj = {
+  0: 11,
+  length: 1
+};
+
+Array.prototype.forEach.call(obj, callbackfn, thisArg);
+
+assert(result, 'result !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-ii-21.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-ii-21.js
new file mode 100644
index 0000000000..3db90a4e84
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-ii-21.js
@@ -0,0 +1,36 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: >
+    Array.prototype.forEach - callbackfn called with correct
+    parameters (kValue is correct)
+---*/
+
+var resultOne = false;
+var resultTwo = false;
+
+function callbackfn(val, idx, obj) {
+  if (idx === 0) {
+    resultOne = (val === 11);
+  }
+
+  if (idx === 1) {
+    resultTwo = (val === 12);
+  }
+
+}
+
+var obj = {
+  0: 11,
+  1: 12,
+  length: 2
+};
+
+Array.prototype.forEach.call(obj, callbackfn);
+
+assert(resultOne, 'resultOne !== true');
+assert(resultTwo, 'resultTwo !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-ii-22.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-ii-22.js
new file mode 100644
index 0000000000..5d985427a7
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-ii-22.js
@@ -0,0 +1,36 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: >
+    Array.prototype.forEach - callbackfn called with correct
+    parameters (the index k is correct)
+---*/
+
+var resultOne = false;
+var resultTwo = false;
+
+function callbackfn(val, idx, obj) {
+  if (val === 11) {
+    resultOne = (idx === 0);
+  }
+
+  if (val === 12) {
+    resultTwo = (idx === 1);
+  }
+
+}
+
+var obj = {
+  0: 11,
+  1: 12,
+  length: 2
+};
+
+Array.prototype.forEach.call(obj, callbackfn);
+
+assert(resultOne, 'resultOne !== true');
+assert(resultTwo, 'resultTwo !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-ii-23.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-ii-23.js
new file mode 100644
index 0000000000..1a4e848648
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-ii-23.js
@@ -0,0 +1,25 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: >
+    Array.prototype.forEach - callbackfn called with correct
+    parameters (this object O is correct)
+---*/
+
+var result = false;
+var obj = {
+  0: 11,
+  length: 2
+};
+
+function callbackfn(val, idx, o) {
+  result = (obj === o);
+}
+
+Array.prototype.forEach.call(obj, callbackfn);
+
+assert(result, 'result !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-ii-4.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-ii-4.js
new file mode 100644
index 0000000000..0be07076bd
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-ii-4.js
@@ -0,0 +1,30 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: >
+    Array.prototype.forEach - k values are passed in ascending numeric
+    order
+---*/
+
+var arr = [0, 1, 2, 3, 4, 5];
+var lastIdx = 0;
+var called = 0;
+var result = true;
+
+function callbackfn(val, idx, o) {
+  called++;
+  if (lastIdx !== idx) {
+    result = false;
+  } else {
+    lastIdx++;
+  }
+}
+
+arr.forEach(callbackfn);
+
+assert(result, 'result !== true');
+assert.sameValue(arr.length, called, 'arr.length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-ii-5.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-ii-5.js
new file mode 100644
index 0000000000..b2576859b2
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-ii-5.js
@@ -0,0 +1,32 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: >
+    Array.prototype.forEach - k values are accessed during each
+    iteration and not prior to starting the loop on an Array
+---*/
+
+var result = true;
+var kIndex = [];
+
+//By below way, we could verify that k would be setted as 0, 1, ..., length - 1 in order, and each value will be setted one time.
+function callbackfn(val, idx, obj) {
+  //Each position should be visited one time, which means k is accessed one time during iterations.
+  if (typeof kIndex[idx] === "undefined") {
+    //when current position is visited, its previous index should has been visited.
+    if (idx !== 0 && typeof kIndex[idx - 1] === "undefined") {
+      result = false;
+    }
+    kIndex[idx] = 1;
+  } else {
+    result = false;
+  }
+}
+
+[11, 12, 13, 14].forEach(callbackfn, undefined);
+
+assert(result, 'result !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-ii-6.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-ii-6.js
new file mode 100644
index 0000000000..725d0cfe81
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-ii-6.js
@@ -0,0 +1,29 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: >
+    Array.prototype.forEach - arguments to callbackfn are self
+    consistent
+---*/
+
+var result = false;
+var obj = {
+  0: 11,
+  length: 1
+};
+var thisArg = {};
+
+function callbackfn() {
+  result = (this === thisArg &&
+    arguments[0] === 11 &&
+    arguments[1] === 0 &&
+    arguments[2] === obj);
+}
+
+Array.prototype.forEach.call(obj, callbackfn, thisArg);
+
+assert(result, 'result !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-ii-7.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-ii-7.js
new file mode 100644
index 0000000000..412f00a381
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-ii-7.js
@@ -0,0 +1,33 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: >
+    Array.prototype.forEach - unhandled exceptions happened in
+    callbackfn terminate iteration
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  if (idx > 0) {
+    accessed = true;
+  }
+  if (idx === 0) {
+    throw new Error("Exception occurred in callbackfn");
+  }
+}
+
+var obj = {
+  0: 11,
+  4: 10,
+  10: 8,
+  length: 20
+};
+assert.throws(Error, function() {
+  Array.prototype.forEach.call(obj, callbackfn);
+});
+assert.sameValue(accessed, false, 'accessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-ii-8.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-ii-8.js
new file mode 100644
index 0000000000..a6f9f43845
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-ii-8.js
@@ -0,0 +1,32 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: >
+    Array.prototype.forEach - element changed by callbackfn on
+    previous iterations is observed
+---*/
+
+var result = false;
+var obj = {
+  0: 11,
+  1: 12,
+  length: 2
+};
+
+function callbackfn(val, idx, o) {
+  if (idx === 0) {
+    obj[idx + 1] = 8;
+  }
+
+  if (idx === 1) {
+    result = (val === 8);
+  }
+}
+
+Array.prototype.forEach.call(obj, callbackfn);
+
+assert(result, 'result !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-ii-9.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-ii-9.js
new file mode 100644
index 0000000000..39f3a8822e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-7-c-ii-9.js
@@ -0,0 +1,21 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: >
+    Array.prototype.forEach - callbackfn is called with 0 formal
+    parameter
+---*/
+
+var called = 0;
+
+function callbackfn() {
+  called++;
+}
+
+[11, 12].forEach(callbackfn);
+
+assert.sameValue(called, 2, 'called');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-8-1.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-8-1.js
new file mode 100644
index 0000000000..c31720f83e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-8-1.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: >
+    Array.prototype.forEach doesn't call callbackfn if 'length' is 0
+    (empty array)
+---*/
+
+var callCnt = 0;
+
+function cb() {
+  callCnt++
+}
+var i = [].forEach(cb);
+
+assert.sameValue(callCnt, 0, 'callCnt');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-8-10.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-8-10.js
new file mode 100644
index 0000000000..e420981f80
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-8-10.js
@@ -0,0 +1,24 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: Array.prototype.forEach - subclassed array when length is reduced
+---*/
+
+foo.prototype = new Array(1, 2, 3);
+
+function foo() {}
+var f = new foo();
+f.length = 1;
+
+var callCnt = 0;
+
+function cb() {
+  callCnt++
+}
+var i = f.forEach(cb);
+
+assert.sameValue(callCnt, 1, 'callCnt');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-8-11.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-8-11.js
new file mode 100644
index 0000000000..7dfb750468
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-8-11.js
@@ -0,0 +1,24 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: >
+    Array.prototype.forEach doesn't mutate the array on which it is
+    called on
+---*/
+
+function callbackfn(val, idx, obj)
+{
+  return true;
+}
+var arr = [1, 2, 3, 4, 5];
+arr.forEach(callbackfn);
+
+assert.sameValue(arr[0], 1, 'arr[0]');
+assert.sameValue(arr[1], 2, 'arr[1]');
+assert.sameValue(arr[2], 3, 'arr[2]');
+assert.sameValue(arr[3], 4, 'arr[3]');
+assert.sameValue(arr[4], 5, 'arr[4]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-8-12.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-8-12.js
new file mode 100644
index 0000000000..d763c47310
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-8-12.js
@@ -0,0 +1,23 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: Array.prototype.forEach doesn't visit expandos
+---*/
+
+var callCnt = 0;
+
+function callbackfn(val, idx, obj)
+{
+  callCnt++;
+}
+var arr = [1, 2, 3, 4, 5];
+arr["i"] = 10;
+arr[true] = 11;
+
+arr.forEach(callbackfn);
+
+assert.sameValue(callCnt, 5, 'callCnt');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-8-13.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-8-13.js
new file mode 100644
index 0000000000..90614a656e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-8-13.js
@@ -0,0 +1,22 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: >
+    Array.prototype.forEach - undefined will be returned when 'len' is
+    0
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+}
+
+var result = [].forEach(callbackfn);
+
+assert.sameValue(typeof result, "undefined", 'typeof result');
+assert.sameValue(accessed, false, 'accessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-8-2.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-8-2.js
new file mode 100644
index 0000000000..1a23bdfd29
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-8-2.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: >
+    Array.prototype.forEach doesn't call callbackfn if 'length' is 0
+    (subclassed Array, length overridden to null (type conversion))
+---*/
+
+foo.prototype = new Array(1, 2, 3);
+
+function foo() {}
+var f = new foo();
+f.length = null;
+
+var callCnt = 0;
+
+function cb() {
+  callCnt++
+}
+var i = f.forEach(cb);
+
+assert.sameValue(callCnt, 0, 'callCnt');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-8-3.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-8-3.js
new file mode 100644
index 0000000000..91efb92f37
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-8-3.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: >
+    Array.prototype.forEach doesn't call callbackfn if 'length' is 0
+    (subclassed Array, length overridden to false (type conversion))
+---*/
+
+foo.prototype = new Array(1, 2, 3);
+
+function foo() {}
+var f = new foo();
+f.length = false;
+
+var callCnt = 0;
+
+function cb() {
+  callCnt++
+}
+var i = f.forEach(cb);
+
+assert.sameValue(callCnt, 0, 'callCnt');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-8-4.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-8-4.js
new file mode 100644
index 0000000000..a207068ae4
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-8-4.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: >
+    Array.prototype.forEach doesn't call callbackfn if 'length' is 0
+    (subclassed Array, length overridden to 0 (type conversion))
+---*/
+
+foo.prototype = new Array(1, 2, 3);
+
+function foo() {}
+var f = new foo();
+f.length = 0;
+
+var callCnt = 0;
+
+function cb() {
+  callCnt++
+}
+var i = f.forEach(cb);
+
+assert.sameValue(callCnt, 0, 'callCnt');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-8-5.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-8-5.js
new file mode 100644
index 0000000000..f9832c79d7
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-8-5.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: >
+    Array.prototype.forEach doesn't call callbackfn if 'length' is 0
+    (subclassed Array, length overridden to '0' (type conversion))
+---*/
+
+foo.prototype = new Array(1, 2, 3);
+
+function foo() {}
+var f = new foo();
+f.length = '0';
+
+var callCnt = 0;
+
+function cb() {
+  callCnt++
+}
+var i = f.forEach(cb);
+
+assert.sameValue(callCnt, 0, 'callCnt');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-8-6.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-8-6.js
new file mode 100644
index 0000000000..e3663c28d0
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-8-6.js
@@ -0,0 +1,32 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: >
+    Array.prototype.forEach doesn't call callbackfn if 'length' is 0
+    (subclassed Array, length overridden with obj with valueOf)
+---*/
+
+foo.prototype = new Array(1, 2, 3);
+
+function foo() {}
+var f = new foo();
+
+var o = {
+  valueOf: function() {
+    return 0;
+  }
+};
+f.length = o;
+
+var callCnt = 0;
+
+function cb() {
+  callCnt++
+}
+var i = f.forEach(cb);
+
+assert.sameValue(callCnt, 0, 'callCnt');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-8-7.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-8-7.js
new file mode 100644
index 0000000000..8e3ff6bc9a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-8-7.js
@@ -0,0 +1,38 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: >
+    Array.prototype.forEach doesn't call callbackfn if 'length' is 0
+    (subclassed Array, length overridden with obj w/o valueOf
+    (toString))
+---*/
+
+foo.prototype = new Array(1, 2, 3);
+
+function foo() {}
+var f = new foo();
+
+var o = {
+  toString: function() {
+    return '0';
+  }
+};
+f.length = o;
+
+// objects inherit the default valueOf method of the Object object;
+// that simply returns the itself. Since the default valueOf() method
+// does not return a primitive value, ES next tries to convert the object
+// to a number by calling its toString() method and converting the
+// resulting string to a number.
+var callCnt = 0;
+
+function cb() {
+  callCnt++
+}
+var i = f.forEach(cb);
+
+assert.sameValue(callCnt, 0, 'callCnt');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-8-8.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-8-8.js
new file mode 100644
index 0000000000..0d12ee5fef
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-8-8.js
@@ -0,0 +1,40 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: >
+    Array.prototype.forEach doesn't call callbackfn if 'length' is 0
+    (subclassed Array, length overridden with []
+---*/
+
+foo.prototype = new Array(1, 2, 3);
+
+function foo() {}
+var f = new foo();
+
+f.length = [];
+
+// objects inherit the default valueOf method of the Object object;
+// that simply returns the itself. Since the default valueOf() method
+// does not return a primitive value, ES next tries to convert the object
+// to a number by calling its toString() method and converting the
+// resulting string to a number.
+//
+// The toString( ) method on Array converts the array elements to strings,
+// then returns the result of concatenating these strings, with commas in
+// between. An array with no elements converts to the empty string, which
+// converts to the number 0. If an array has a single element that is a
+// number n, the array converts to a string representation of n, which is
+// then converted back to n itself. If an array contains more than one element,
+// or if its one element is not a number, the array converts to NaN.
+var callCnt = 0;
+
+function cb() {
+  callCnt++
+}
+var i = f.forEach(cb);
+
+assert.sameValue(callCnt, 0, 'callCnt');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-8-9.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-8-9.js
new file mode 100644
index 0000000000..86b1401585
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/15.4.4.18-8-9.js
@@ -0,0 +1,41 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: >
+    Array.prototype.forEach doesn't call callbackfn if 'length' is 0
+    (subclassed Array, length overridden with [0]
+---*/
+
+foo.prototype = new Array(1, 2, 3);
+
+function foo() {}
+var f = new foo();
+
+f.length = [0];
+
+// objects inherit the default valueOf method of the Object object;
+// that simply returns the itself. Since the default valueOf() method
+// does not return a primitive value, ES next tries to convert the object
+// to a number by calling its toString() method and converting the
+// resulting string to a number.
+//
+// The toString( ) method on Array converts the array elements to strings,
+// then returns the result of concatenating these strings, with commas in
+// between. An array with no elements converts to the empty string, which
+// converts to the number 0. If an array has a single element that is a
+// number n, the array converts to a string representation of n, which is
+// then converted back to n itself. If an array contains more than one element,
+// or if its one element is not a number, the array converts to NaN.
+
+var callCnt = 0;
+
+function cb() {
+  callCnt++
+}
+var i = f.forEach(cb);
+
+assert.sameValue(callCnt, 0, 'callCnt');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/S15.4.4.18_A1.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/S15.4.4.18_A1.js
new file mode 100644
index 0000000000..1b43537136
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/S15.4.4.18_A1.js
@@ -0,0 +1,14 @@
+// Copyright 2011 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: array.forEach can be frozen while in progress
+esid: sec-array.prototype.foreach
+description: Freezes array.forEach during a forEach to see if it works
+---*/
+
+['z'].forEach(function() {
+  Object.freeze(Array.prototype.forEach);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/S15.4.4.18_A2.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/S15.4.4.18_A2.js
new file mode 100644
index 0000000000..9a0f116a3a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/S15.4.4.18_A2.js
@@ -0,0 +1,17 @@
+// Copyright 2011 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: array.forEach can be frozen while in progress
+esid: sec-array.prototype.foreach
+description: Freezes array.forEach during a forEach to see if it works
+---*/
+
+function foo() {
+  ['z'].forEach(function() {
+    Object.freeze(Array.prototype.forEach);
+  });
+}
+foo();
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/browser.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/browser.js
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/call-with-boolean.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/call-with-boolean.js
new file mode 100644
index 0000000000..792044dc69
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/call-with-boolean.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2020 Rick Waldron.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.forEach
+description: Array.prototype.forEach applied to boolean primitive
+---*/
+
+assert.sameValue(
+  Array.prototype.forEach.call(true, () => {}),
+  undefined,
+  'Array.prototype.forEach.call(true, () => {}) must return undefined'
+);
+assert.sameValue(
+  Array.prototype.forEach.call(false, () => {}),
+  undefined,
+  'Array.prototype.forEach.call(false, () => {}) must return undefined'
+);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/callbackfn-resize-arraybuffer.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/callbackfn-resize-arraybuffer.js
new file mode 100644
index 0000000000..402b9a7007
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/callbackfn-resize-arraybuffer.js
@@ -0,0 +1,72 @@
+// |reftest| shell-option(--enable-arraybuffer-resizable) skip-if(!ArrayBuffer.prototype.resize||!xulRuntime.shell) -- resizable-arraybuffer is not enabled unconditionally, requires shell-options
+// Copyright (C) 2021 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.forEach
+description: TypedArray instance buffer can be resized during iteration
+includes: [testTypedArray.js, compareArray.js]
+features: [TypedArray, resizable-arraybuffer]
+---*/
+
+// If the host chooses to throw as allowed by the specification, the observed
+// behavior will be identical to the case where `ArrayBuffer.prototype.resize`
+// has not been implemented. The following assertion prevents this test from
+// passing in runtimes which have not implemented the method.
+assert.sameValue(typeof ArrayBuffer.prototype.resize, 'function');
+
+testWithTypedArrayConstructors(function(TA) {
+  var BPE = TA.BYTES_PER_ELEMENT;
+  var buffer = new ArrayBuffer(BPE * 3, {maxByteLength: BPE * 4});
+  var sample = new TA(buffer);
+  var expectedElements, expectedIndices, expectedArrays;
+  var elements, indices, arrays, result;
+
+  elements = [];
+  indices = [];
+  arrays = [];
+  result = Array.prototype.forEach.call(sample, function(element, index, array) {
+    if (elements.length === 0) {
+      try {
+        buffer.resize(2 * BPE);
+        expectedElements = [0, 0];
+        expectedIndices = [0, 1];
+        expectedArrays = [sample, sample];
+      } catch (_) {
+        expectedElements = [0, 0, 0];
+        expectedIndices = [0, 1, 2];
+        expectedArrays = [sample, sample, sample];
+      }
+    }
+
+    elements.push(element);
+    indices.push(index);
+    arrays.push(array);
+  });
+
+  assert.compareArray(elements, expectedElements, 'elements (shrink)');
+  assert.compareArray(indices, expectedIndices, 'indices (shrink)');
+  assert.compareArray(arrays, expectedArrays, 'arrays (shrink)');
+  assert.sameValue(result, undefined, 'result (shrink)');
+
+  elements = [];
+  indices = [];
+  arrays = [];
+  result = Array.prototype.forEach.call(sample, function(element, index, array) {
+    if (elements.length === 0) {
+      try {
+        buffer.resize(4 * BPE);
+      } catch (_) {}
+    }
+
+    elements.push(element);
+    indices.push(index);
+    arrays.push(array);
+  });
+
+  assert.compareArray(elements, expectedElements, 'elements (grow)');
+  assert.compareArray(indices, expectedIndices, 'indices (grow)');
+  assert.compareArray(arrays, expectedArrays, 'arrays (grow)');
+  assert.sameValue(result, undefined, 'result (grow)');
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/length.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/length.js
new file mode 100644
index 0000000000..8ca4a6185e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/length.js
@@ -0,0 +1,32 @@
+// Copyright (C) 2017 Leo Balter. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.forEach
+description: >
+  The "length" property of Array.prototype.forEach
+info: |
+  22.1.3.10 Array.prototype.forEach ( callbackfn [ , thisArg ] )
+
+  17 ECMAScript Standard Built-in Objects
+
+  Every built-in function object, including constructors, has a length property
+  whose value is an integer. Unless otherwise specified, this value is equal to
+  the largest number of named arguments shown in the subclause headings for the
+  function description. Optional parameters (which are indicated with brackets:
+  [ ]) or rest parameters (which are shown using the form «...name») are not
+  included in the default argument count.
+
+  Unless otherwise specified, the length property of a built-in function object
+  has the attributes { [[Writable]]: false, [[Enumerable]]: false,
+    [[Configurable]]: true }.
+includes: [propertyHelper.js]
+---*/
+
+assert.sameValue(Array.prototype.forEach.length, 1);
+
+verifyNotEnumerable(Array.prototype.forEach, 'length');
+verifyNotWritable(Array.prototype.forEach, 'length');
+verifyConfigurable(Array.prototype.forEach, 'length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/name.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/name.js
new file mode 100644
index 0000000000..08beb915e8
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/name.js
@@ -0,0 +1,28 @@
+// Copyright (C) 2015 André Bargull. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.foreach
+description: >
+  Array.prototype.forEach.name is "forEach".
+info: |
+  Array.prototype.forEach ( callbackfn [ , thisArg ] )
+
+  17 ECMAScript Standard Built-in Objects:
+    Every built-in Function object, including constructors, that is not
+    identified as an anonymous function has a name property whose value
+    is a String.
+
+    Unless otherwise specified, the name property of a built-in Function
+    object, if it exists, has the attributes { [[Writable]]: false,
+    [[Enumerable]]: false, [[Configurable]]: true }.
+includes: [propertyHelper.js]
+---*/
+
+assert.sameValue(Array.prototype.forEach.name, "forEach");
+
+verifyNotEnumerable(Array.prototype.forEach, "name");
+verifyNotWritable(Array.prototype.forEach, "name");
+verifyConfigurable(Array.prototype.forEach, "name");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/not-a-constructor.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/not-a-constructor.js
new file mode 100644
index 0000000000..9662abaf98
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/not-a-constructor.js
@@ -0,0 +1,35 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Array.prototype.forEach does not implement [[Construct]], is not new-able
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+
+  sec-evaluatenew
+
+  ...
+  7. If IsConstructor(constructor) is false, throw a TypeError exception.
+  ...
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Array.prototype.forEach),
+  false,
+  'isConstructor(Array.prototype.forEach) must return false'
+);
+
+assert.throws(TypeError, () => {
+  new Array.prototype.forEach(() => {});
+}, '`new Array.prototype.forEach(() => {})` throws TypeError');
+
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/prop-desc.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/prop-desc.js
new file mode 100644
index 0000000000..d26cffd102
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/prop-desc.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2017 Leo Balter. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.forEach
+description: >
+  "forEach" property of Array.prototype
+info: |
+  17 ECMAScript Standard Built-in Objects
+  
+  Every other data property described in clauses 18 through 26 and in Annex B.2
+  has the attributes { [[Writable]]: true, [[Enumerable]]: false,
+    [[Configurable]]: true } unless otherwise specified.
+includes: [propertyHelper.js]
+---*/
+
+assert.sameValue(typeof Array.prototype.forEach, 'function', 'typeof');
+
+verifyNotEnumerable(Array.prototype, "forEach");
+verifyWritable(Array.prototype, "forEach");
+verifyConfigurable(Array.prototype, "forEach");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/forEach/shell.js b/js/src/tests/test262/built-ins/Array/prototype/forEach/shell.js
new file mode 100644
index 0000000000..05fecd6ef1
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/forEach/shell.js
@@ -0,0 +1,161 @@
+// GENERATED, DO NOT EDIT
+// file: testTypedArray.js
+// Copyright (C) 2015 André Bargull. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+description: |
+    Collection of functions used to assert the correctness of TypedArray objects.
+defines:
+  - floatArrayConstructors
+  - nonClampedIntArrayConstructors
+  - intArrayConstructors
+  - typedArrayConstructors
+  - TypedArray
+  - testWithTypedArrayConstructors
+  - nonAtomicsFriendlyTypedArrayConstructors
+  - testWithAtomicsFriendlyTypedArrayConstructors
+  - testWithNonAtomicsFriendlyTypedArrayConstructors
+  - testTypedArrayConversions
+---*/
+
+var floatArrayConstructors = [
+  Float64Array,
+  Float32Array
+];
+
+var nonClampedIntArrayConstructors = [
+  Int32Array,
+  Int16Array,
+  Int8Array,
+  Uint32Array,
+  Uint16Array,
+  Uint8Array
+];
+
+var intArrayConstructors = nonClampedIntArrayConstructors.concat([Uint8ClampedArray]);
+
+// Float16Array is a newer feature
+// adding it to this list unconditionally would cause implementations lacking it to fail every test which uses it
+if (typeof Float16Array !== 'undefined') {
+  floatArrayConstructors.push(Float16Array);
+}
+
+/**
+ * Array containing every non-bigint typed array constructor.
+ */
+
+var typedArrayConstructors = floatArrayConstructors.concat(intArrayConstructors);
+
+/**
+ * The %TypedArray% intrinsic constructor function.
+ */
+var TypedArray = Object.getPrototypeOf(Int8Array);
+
+/**
+ * Callback for testing a typed array constructor.
+ *
+ * @callback typedArrayConstructorCallback
+ * @param {Function} Constructor the constructor object to test with.
+ */
+
+/**
+ * Calls the provided function for every typed array constructor.
+ *
+ * @param {typedArrayConstructorCallback} f - the function to call for each typed array constructor.
+ * @param {Array} selected - An optional Array with filtered typed arrays
+ */
+function testWithTypedArrayConstructors(f, selected) {
+  var constructors = selected || typedArrayConstructors;
+  for (var i = 0; i < constructors.length; ++i) {
+    var constructor = constructors[i];
+    try {
+      f(constructor);
+    } catch (e) {
+      e.message += " (Testing with " + constructor.name + ".)";
+      throw e;
+    }
+  }
+}
+
+var nonAtomicsFriendlyTypedArrayConstructors = floatArrayConstructors.concat([Uint8ClampedArray]);
+/**
+ * Calls the provided function for every non-"Atomics Friendly" typed array constructor.
+ *
+ * @param {typedArrayConstructorCallback} f - the function to call for each typed array constructor.
+ * @param {Array} selected - An optional Array with filtered typed arrays
+ */
+function testWithNonAtomicsFriendlyTypedArrayConstructors(f) {
+  testWithTypedArrayConstructors(f, nonAtomicsFriendlyTypedArrayConstructors);
+}
+
+/**
+ * Calls the provided function for every "Atomics Friendly" typed array constructor.
+ *
+ * @param {typedArrayConstructorCallback} f - the function to call for each typed array constructor.
+ * @param {Array} selected - An optional Array with filtered typed arrays
+ */
+function testWithAtomicsFriendlyTypedArrayConstructors(f) {
+  testWithTypedArrayConstructors(f, [
+    Int32Array,
+    Int16Array,
+    Int8Array,
+    Uint32Array,
+    Uint16Array,
+    Uint8Array,
+  ]);
+}
+
+/**
+ * Helper for conversion operations on TypedArrays, the expected values
+ * properties are indexed in order to match the respective value for each
+ * TypedArray constructor
+ * @param  {Function} fn - the function to call for each constructor and value.
+ *                         will be called with the constructor, value, expected
+ *                         value, and a initial value that can be used to avoid
+ *                         a false positive with an equivalent expected value.
+ */
+function testTypedArrayConversions(byteConversionValues, fn) {
+  var values = byteConversionValues.values;
+  var expected = byteConversionValues.expected;
+
+  testWithTypedArrayConstructors(function(TA) {
+    var name = TA.name.slice(0, -5);
+
+    return values.forEach(function(value, index) {
+      var exp = expected[name][index];
+      var initial = 0;
+      if (exp === 0) {
+        initial = 1;
+      }
+      fn(TA, value, exp, initial);
+    });
+  });
+}
+
+/**
+ * Checks if the given argument is one of the float-based TypedArray constructors.
+ *
+ * @param {constructor} ctor - the value to check
+ * @returns {boolean}
+ */
+function isFloatTypedArrayConstructor(arg) {
+  return floatArrayConstructors.indexOf(arg) !== -1;
+}
+
+/**
+ * Determines the precision of the given float-based TypedArray constructor.
+ *
+ * @param {constructor} ctor - the value to check
+ * @returns {string} "half", "single", or "double" for Float16Array, Float32Array, and Float64Array respectively.
+ */
+function floatTypedArrayConstructorPrecision(FA) {
+  if (typeof Float16Array !== "undefined" && FA === Float16Array) {
+    return "half";
+  } else if (FA === Float32Array) {
+    return "single";
+  } else if (FA === Float64Array) {
+    return "double";
+  } else {
+    throw new Error("Malformed test - floatTypedArrayConstructorPrecision called with non-float TypedArray");
+  }
+}
diff --git a/js/src/tests/test262/built-ins/Array/prototype/includes/browser.js b/js/src/tests/test262/built-ins/Array/prototype/includes/browser.js
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/js/src/tests/test262/built-ins/Array/prototype/includes/call-with-boolean.js b/js/src/tests/test262/built-ins/Array/prototype/includes/call-with-boolean.js
new file mode 100644
index 0000000000..ca044e76fe
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/includes/call-with-boolean.js
@@ -0,0 +1,17 @@
+// Copyright (c) 2020 Rick Waldron.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.includes
+description: Array.prototype.includes applied to boolean primitive
+features: [Array.prototype.includes]
+---*/
+
+assert.sameValue(Array.prototype.includes.call(true), false, 'Array.prototype.includes.call(true) must return false');
+assert.sameValue(
+  Array.prototype.includes.call(false),
+  false,
+  'Array.prototype.includes.call(false) must return false'
+);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/includes/fromIndex-equal-or-greater-length-returns-false.js b/js/src/tests/test262/built-ins/Array/prototype/includes/fromIndex-equal-or-greater-length-returns-false.js
new file mode 100644
index 0000000000..94e21047a7
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/includes/fromIndex-equal-or-greater-length-returns-false.js
@@ -0,0 +1,26 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.includes
+description: Return false if fromIndex >= ArrayLength
+info: |
+  22.1.3.11 Array.prototype.includes ( searchElement [ , fromIndex ] )
+
+  ...
+  4. Let n be ? ToInteger(fromIndex). (If fromIndex is undefined, this step
+  produces the value 0.)
+  5. If n ≥ 0, then
+    a. Let k be n.
+  ...
+  7. Repeat, while k < len
+    ...
+  8. Return false.
+features: [Array.prototype.includes]
+---*/
+
+var sample = [7, 7, 7, 7];
+assert.sameValue(sample.includes(7, 4), false, "length");
+assert.sameValue(sample.includes(7, 5), false, "length + 1");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/includes/fromIndex-infinity.js b/js/src/tests/test262/built-ins/Array/prototype/includes/fromIndex-infinity.js
new file mode 100644
index 0000000000..b54da632c6
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/includes/fromIndex-infinity.js
@@ -0,0 +1,37 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.includes
+description: handle Infinity values for fromIndex
+info: |
+  22.1.3.11 Array.prototype.includes ( searchElement [ , fromIndex ] )
+
+  ...
+  4. Let n be ? ToInteger(fromIndex). (If fromIndex is undefined, this step
+  produces the value 0.)
+  5. If n ≥ 0, then
+    a. Let k be n.
+  6. Else n < 0,
+    a. Let k be len + n.
+    b. If k < 0, let k be 0.
+  7. Repeat, while k < len
+    ...
+  8. Return false.
+features: [Array.prototype.includes]
+---*/
+
+var sample = [42, 43, 43, 41];
+
+assert.sameValue(
+  sample.includes(43, Infinity),
+  false,
+  "includes(43, Infinity)"
+);
+assert.sameValue(
+  sample.includes(43, -Infinity),
+  true,
+  "includes(43, -Infinity)"
+);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/includes/fromIndex-minus-zero.js b/js/src/tests/test262/built-ins/Array/prototype/includes/fromIndex-minus-zero.js
new file mode 100644
index 0000000000..5a58d0e358
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/includes/fromIndex-minus-zero.js
@@ -0,0 +1,24 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.includes
+description: -0 fromIndex becomes 0
+info: |
+  22.1.3.11 Array.prototype.includes ( searchElement [ , fromIndex ] )
+
+  ...
+  5. If n ≥ 0, then
+    a. Let k be n.
+  ...
+  7. Repeat, while k < len
+  ...
+features: [Array.prototype.includes]
+---*/
+
+var sample = [42, 43];
+assert.sameValue(sample.includes(42, -0), true, "-0 [0]");
+assert.sameValue(sample.includes(43, -0), true, "-0 [1]");
+assert.sameValue(sample.includes(44, -0), false, "-0 [2]");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/includes/get-prop.js b/js/src/tests/test262/built-ins/Array/prototype/includes/get-prop.js
new file mode 100644
index 0000000000..572f4afe54
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/includes/get-prop.js
@@ -0,0 +1,48 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.includes
+description: get array-like indexed properties
+info: |
+  22.1.3.11 Array.prototype.includes ( searchElement [ , fromIndex ] )
+
+  ...
+  7. Repeat, while k < len
+    a. Let elementK be the result of ? Get(O, ! ToString(k)).
+  ...
+includes: [compareArray.js]
+features: [Proxy, Array.prototype.includes]
+---*/
+
+var calls;
+
+var obj = {};
+
+var p = new Proxy(obj, {
+  get: function(_, key) {
+    calls.push(key);
+
+    if (key === "length") {
+      return 4;
+    }
+
+    return key * 10;
+  }
+});
+
+calls = [];
+assert.sameValue(
+  [].includes.call(p, 42),
+  false,
+  '[].includes.call("new Proxy(obj, {get: function(_, key) {calls.push(key); if (key === "length") {return 4;} return key * 10;}})", 42) must return false'
+);
+assert.compareArray(calls, ["length", "0", "1", "2", "3"],
+  'The value of calls is expected to be ["length", "0", "1", "2", "3"]'
+);
+
+calls = [];
+assert.sameValue([].includes.call(p, 10), true, '[].includes.call("new Proxy(obj, {get: function(_, key) {calls.push(key); if (key === "length") {return 4;} return key * 10;}})", 10) must return true');
+assert.compareArray(calls, ["length", "0", "1"], 'The value of calls is expected to be ["length", "0", "1"]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/includes/length-boundaries.js b/js/src/tests/test262/built-ins/Array/prototype/includes/length-boundaries.js
new file mode 100644
index 0000000000..56811d9ca8
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/includes/length-boundaries.js
@@ -0,0 +1,85 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.includes
+description: length boundaries from ToLength operation
+info: |
+  22.1.3.11 Array.prototype.includes ( searchElement [ , fromIndex ] )
+
+  ...
+  2. Let len be ? ToLength(? Get(O, "length")).
+  ...
+
+  7.1.15 ToLength ( argument )
+
+  1. Let len be ? ToInteger(argument).
+  2. If len ≤ +0, return +0.
+  3. If len is +∞, return 2**53-1.
+  4. Return min(len, 2**53-1).
+features: [Array.prototype.includes]
+---*/
+
+var obj = {
+  "0": "a",
+  "1": "b",
+  "9007199254740990": "c", // 2 ** 53 - 2
+  "9007199254740991": "d", // 2 ** 53 - 1
+  "9007199254740992": "e", // 2 ** 53
+};
+
+obj.length = -0;
+assert.sameValue([].includes.call(obj, "a"), false, "-0");
+
+obj.length = -1;
+assert.sameValue([].includes.call(obj, "a"), false, "-1");
+
+obj.length = -0.1;
+assert.sameValue([].includes.call(obj, "a"), false, "-0.1");
+
+obj.length = -Infinity;
+assert.sameValue([].includes.call(obj, "a"), false, "-Infinity");
+
+var fromIndex = 9007199254740990;
+
+obj.length = 9007199254740991;
+assert.sameValue(
+  [].includes.call(obj, "c", fromIndex),
+  true,
+  "2**53-1, found value at 2**53-2"
+);
+
+obj.length = 9007199254740991;
+assert.sameValue(
+  [].includes.call(obj, "d", fromIndex),
+  false,
+  "2**53-1, ignores indexes >= 2**53-1"
+);
+
+obj.length = 9007199254740992;
+assert.sameValue(
+  [].includes.call(obj, "d", fromIndex),
+  false,
+  "2**53, ignores indexes >= 2**53-1"
+);
+
+obj.length = 9007199254740993;
+assert.sameValue(
+  [].includes.call(obj, "d", fromIndex),
+  false,
+  "2**53+1, ignores indexes >= 2**53-1"
+);
+
+obj.length = Infinity;
+assert.sameValue(
+  [].includes.call(obj, "c", fromIndex),
+  true,
+  "Infinity, found item"
+);
+assert.sameValue(
+  [].includes.call(obj, "d", fromIndex),
+  false,
+  "Infinity, ignores indexes >= 2**53-1"
+);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/includes/length-zero-returns-false.js b/js/src/tests/test262/built-ins/Array/prototype/includes/length-zero-returns-false.js
new file mode 100644
index 0000000000..0911c7b02e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/includes/length-zero-returns-false.js
@@ -0,0 +1,30 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.includes
+description: Returns false if length is 0
+info: |
+  22.1.3.11 Array.prototype.includes ( searchElement [ , fromIndex ] )
+
+  ...
+  2. Let len be ? ToLength(? Get(O, "length")).
+  3. If len is 0, return false.
+  ...
+features: [Array.prototype.includes]
+---*/
+
+var calls = 0;
+var fromIndex = {
+  valueOf: function() {
+    calls++;
+  }
+};
+
+var sample = [];
+assert.sameValue(sample.includes(0), false, "returns false");
+assert.sameValue(sample.includes(), false, "returns false - no arg");
+assert.sameValue(sample.includes(0, fromIndex), false, "using fromIndex");
+assert.sameValue(calls, 0, "length is checked before ToInteger(fromIndex)");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/includes/length.js b/js/src/tests/test262/built-ins/Array/prototype/includes/length.js
new file mode 100644
index 0000000000..e437df4d3c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/includes/length.js
@@ -0,0 +1,32 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.includes
+description: >
+  Array.prototype.includes.length is 1.
+info: |
+  Array.prototype.includes ( searchElement [ , fromIndex ] )
+
+  17 ECMAScript Standard Built-in Objects:
+    Every built-in Function object, including constructors, has a length
+    property whose value is an integer. Unless otherwise specified, this
+    value is equal to the largest number of named arguments shown in the
+    subclause headings for the function description, including optional
+    parameters. However, rest parameters shown using the form “...name”
+    are not included in the default argument count.
+
+    Unless otherwise specified, the length property of a built-in Function
+    object has the attributes { [[Writable]]: false, [[Enumerable]]: false,
+    [[Configurable]]: true }.
+includes: [propertyHelper.js]
+features: [Array.prototype.includes]
+---*/
+
+assert.sameValue(Array.prototype.includes.length, 1);
+
+verifyNotEnumerable(Array.prototype.includes, "length");
+verifyNotWritable(Array.prototype.includes, "length");
+verifyConfigurable(Array.prototype.includes, "length");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/includes/name.js b/js/src/tests/test262/built-ins/Array/prototype/includes/name.js
new file mode 100644
index 0000000000..c97a1fed91
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/includes/name.js
@@ -0,0 +1,29 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.includes
+description: >
+  Array.prototype.includes.name is "includes".
+info: |
+  Array.prototype.includes (searchElement [ , fromIndex ] )
+
+  17 ECMAScript Standard Built-in Objects:
+    Every built-in Function object, including constructors, that is not
+    identified as an anonymous function has a name property whose value
+    is a String.
+
+    Unless otherwise specified, the name property of a built-in Function
+    object, if it exists, has the attributes { [[Writable]]: false,
+    [[Enumerable]]: false, [[Configurable]]: true }.
+includes: [propertyHelper.js]
+features: [Array.prototype.includes]
+---*/
+
+assert.sameValue(Array.prototype.includes.name, "includes");
+
+verifyNotEnumerable(Array.prototype.includes, "name");
+verifyNotWritable(Array.prototype.includes, "name");
+verifyConfigurable(Array.prototype.includes, "name");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/includes/no-arg.js b/js/src/tests/test262/built-ins/Array/prototype/includes/no-arg.js
new file mode 100644
index 0000000000..ead28581d8
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/includes/no-arg.js
@@ -0,0 +1,22 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.includes
+description: no argument searches for a undefined value
+info: |
+  22.1.3.11 Array.prototype.includes ( searchElement [ , fromIndex ] )
+
+  ...
+  7. Repeat, while k < len
+    a. Let elementK be the result of ? Get(O, ! ToString(k)).
+    b. If SameValueZero(searchElement, elementK) is true, return true.
+    c. Increase k by 1.
+  ...
+features: [Array.prototype.includes]
+---*/
+
+assert.sameValue([0].includes(), false, "[0].includes()");
+assert.sameValue([undefined].includes(), true, "[undefined].includes()");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/includes/not-a-constructor.js b/js/src/tests/test262/built-ins/Array/prototype/includes/not-a-constructor.js
new file mode 100644
index 0000000000..0d673a9c31
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/includes/not-a-constructor.js
@@ -0,0 +1,35 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Array.prototype.includes does not implement [[Construct]], is not new-able
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+
+  sec-evaluatenew
+
+  ...
+  7. If IsConstructor(constructor) is false, throw a TypeError exception.
+  ...
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function, Array.prototype.includes]
+---*/
+
+assert.sameValue(
+  isConstructor(Array.prototype.includes),
+  false,
+  'isConstructor(Array.prototype.includes) must return false'
+);
+
+assert.throws(TypeError, () => {
+  new Array.prototype.includes(1);
+}, '`new Array.prototype.includes(1)` throws TypeError');
+
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/includes/prop-desc.js b/js/src/tests/test262/built-ins/Array/prototype/includes/prop-desc.js
new file mode 100644
index 0000000000..73df81c82e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/includes/prop-desc.js
@@ -0,0 +1,19 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.includes
+description: >
+  "includes" property of Array.prototype
+info: |
+  ES6 section 17: Every other data property described in clauses 18 through 26
+  and in Annex B.2 has the attributes { [[Writable]]: true,
+  [[Enumerable]]: false, [[Configurable]]: true } unless otherwise specified.
+includes: [propertyHelper.js]
+features: [Array.prototype.includes]
+---*/
+
+verifyNotEnumerable(Array.prototype, "includes");
+verifyWritable(Array.prototype, "includes");
+verifyConfigurable(Array.prototype, "includes");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/includes/return-abrupt-get-length.js b/js/src/tests/test262/built-ins/Array/prototype/includes/return-abrupt-get-length.js
new file mode 100644
index 0000000000..db90db38d1
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/includes/return-abrupt-get-length.js
@@ -0,0 +1,28 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.includes
+description: Return abrupt from Get(O, "length")
+info: |
+  22.1.3.11 Array.prototype.includes ( searchElement [ , fromIndex ] )
+
+  ...
+  2. Let len be ? ToLength(? Get(O, "length")).
+  ...
+features: [Array.prototype.includes]
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "length", {
+  get: function() {
+    throw new Test262Error();
+  }
+});
+
+assert.throws(Test262Error, function() {
+  [].includes.call(obj, 7);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/includes/return-abrupt-get-prop.js b/js/src/tests/test262/built-ins/Array/prototype/includes/return-abrupt-get-prop.js
new file mode 100644
index 0000000000..14b1a49d47
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/includes/return-abrupt-get-prop.js
@@ -0,0 +1,41 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.includes
+description: Return abrupt getting index properties
+info: |
+  22.1.3.11 Array.prototype.includes ( searchElement [ , fromIndex ] )
+
+  ...
+  7. Repeat, while k < len
+    a. Let elementK be the result of ? Get(O, ! ToString(k)).
+  ...
+features: [Array.prototype.includes]
+---*/
+
+var stopped = 0;
+
+var obj = {
+  length: 3
+};
+
+Object.defineProperty(obj, "1", {
+  get: function() {
+    throw new Test262Error();
+  }
+});
+
+Object.defineProperty(obj, "2", {
+  get: function() {
+    stopped++;
+  }
+});
+
+assert.throws(Test262Error, function() {
+  [].includes.call(obj, 7);
+});
+
+assert.sameValue(stopped, 0, "It stops the loop after the abrupt completion");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/includes/return-abrupt-tointeger-fromindex-symbol.js b/js/src/tests/test262/built-ins/Array/prototype/includes/return-abrupt-tointeger-fromindex-symbol.js
new file mode 100644
index 0000000000..34426017f4
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/includes/return-abrupt-tointeger-fromindex-symbol.js
@@ -0,0 +1,25 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.includes
+description: Return abrupt from ToInteger(fromIndex) - using symbol
+info: |
+  22.1.3.11 Array.prototype.includes ( searchElement [ , fromIndex ] )
+
+  ...
+  4. Let n be ? ToInteger(fromIndex). (If fromIndex is undefined, this step
+  produces the value 0.)
+  ...
+features: [Symbol, Array.prototype.includes]
+---*/
+
+var fromIndex = Symbol("1");
+
+var sample = [7];
+
+assert.throws(TypeError, function() {
+  sample.includes(7, fromIndex);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/includes/return-abrupt-tointeger-fromindex.js b/js/src/tests/test262/built-ins/Array/prototype/includes/return-abrupt-tointeger-fromindex.js
new file mode 100644
index 0000000000..0ec1c60e4b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/includes/return-abrupt-tointeger-fromindex.js
@@ -0,0 +1,29 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.includes
+description: Return abrupt from ToInteger(fromIndex)
+info: |
+  22.1.3.11 Array.prototype.includes ( searchElement [ , fromIndex ] )
+
+  ...
+  4. Let n be ? ToInteger(fromIndex). (If fromIndex is undefined, this step
+  produces the value 0.)
+  ...
+features: [Array.prototype.includes]
+---*/
+
+var fromIndex = {
+  valueOf: function() {
+    throw new Test262Error();
+  }
+};
+
+var sample = [7];
+
+assert.throws(Test262Error, function() {
+  sample.includes(7, fromIndex);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/includes/return-abrupt-tonumber-length-symbol.js b/js/src/tests/test262/built-ins/Array/prototype/includes/return-abrupt-tonumber-length-symbol.js
new file mode 100644
index 0000000000..d0d41dd0dd
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/includes/return-abrupt-tonumber-length-symbol.js
@@ -0,0 +1,24 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.includes
+description: Return abrupt from ToNumber(symbol "length")
+info: |
+  22.1.3.11 Array.prototype.includes ( searchElement [ , fromIndex ] )
+
+  ...
+  2. Let len be ? ToLength(? Get(O, "length")).
+  ...
+features: [Symbol, Array.prototype.includes]
+---*/
+
+var obj = {
+  length: Symbol("1")
+};
+
+assert.throws(TypeError, function() {
+  [].includes.call(obj, 7);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/includes/return-abrupt-tonumber-length.js b/js/src/tests/test262/built-ins/Array/prototype/includes/return-abrupt-tonumber-length.js
new file mode 100644
index 0000000000..cfd5d6a024
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/includes/return-abrupt-tonumber-length.js
@@ -0,0 +1,40 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.includes
+description: Return abrupt from ToNumber("length")
+info: |
+  22.1.3.11 Array.prototype.includes ( searchElement [ , fromIndex ] )
+
+  ...
+  2. Let len be ? ToLength(? Get(O, "length")).
+  ...
+features: [Array.prototype.includes]
+---*/
+
+var obj1 = {
+  length: {
+    valueOf: function() {
+      throw new Test262Error();
+    }
+  }
+};
+
+var obj2 = {
+  length: {
+    toString: function() {
+      throw new Test262Error();
+    }
+  }
+};
+
+assert.throws(Test262Error, function() {
+  [].includes.call(obj1);
+}, "valueOf");
+
+assert.throws(Test262Error, function() {
+  [].includes.call(obj2);
+}, "toString");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/includes/samevaluezero.js b/js/src/tests/test262/built-ins/Array/prototype/includes/samevaluezero.js
new file mode 100644
index 0000000000..091cfc72e3
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/includes/samevaluezero.js
@@ -0,0 +1,30 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.includes
+description: search element is compared using SameValueZero
+info: |
+  22.1.3.11 Array.prototype.includes ( searchElement [ , fromIndex ] )
+
+  ...
+  7. Repeat, while k < len
+    a. Let elementK be the result of ? Get(O, ! ToString(k)).
+    b. If SameValueZero(searchElement, elementK) is true, return true.
+    c. Increase k by 1.
+  ...
+features: [Array.prototype.includes]
+---*/
+
+var sample = [42, 0, 1, NaN];
+assert.sameValue(sample.includes("42"), false, "'42'");
+assert.sameValue(sample.includes([42]), false, "[42]");
+assert.sameValue(sample.includes(42.0), true, "42.0");
+assert.sameValue(sample.includes(-0), true, "-0");
+assert.sameValue(sample.includes(true), false, "true");
+assert.sameValue(sample.includes(false), false, "false");
+assert.sameValue(sample.includes(null), false, "null");
+assert.sameValue(sample.includes(""), false, "empty string");
+assert.sameValue(sample.includes(NaN), true, "NaN");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/includes/search-found-returns-true.js b/js/src/tests/test262/built-ins/Array/prototype/includes/search-found-returns-true.js
new file mode 100644
index 0000000000..c6f0bfd9a4
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/includes/search-found-returns-true.js
@@ -0,0 +1,43 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.includes
+description: returns true for found index
+info: |
+  22.1.3.11 Array.prototype.includes ( searchElement [ , fromIndex ] )
+
+  ...
+  5. If n ≥ 0, then
+    a. Let k be n.
+  6. Else n < 0,
+    a. Let k be len + n.
+    b. If k < 0, let k be 0.
+  7. Repeat, while k < len
+    a. Let elementK be the result of ? Get(O, ! ToString(k)).
+    b. If SameValueZero(searchElement, elementK) is true, return true.
+    c. Increase k by 1.
+  ...
+features: [Symbol, Array.prototype.includes]
+---*/
+
+var symbol = Symbol("1");
+var obj = {};
+var array = [];
+
+var sample = [42, "test262", null, undefined, true, false, 0, -1, "", symbol, obj, array];
+
+assert.sameValue(sample.includes(42), true, "42");
+assert.sameValue(sample.includes("test262"), true, "'test262'");
+assert.sameValue(sample.includes(null), true, "null");
+assert.sameValue(sample.includes(undefined), true, "undefined");
+assert.sameValue(sample.includes(true), true, "true");
+assert.sameValue(sample.includes(false), true, "false");
+assert.sameValue(sample.includes(0), true, "0");
+assert.sameValue(sample.includes(-1), true, "-1");
+assert.sameValue(sample.includes(""), true, "the empty string");
+assert.sameValue(sample.includes(symbol), true, "symbol");
+assert.sameValue(sample.includes(obj), true, "obj");
+assert.sameValue(sample.includes(array), true, "array");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/includes/search-not-found-returns-false.js b/js/src/tests/test262/built-ins/Array/prototype/includes/search-not-found-returns-false.js
new file mode 100644
index 0000000000..aadd6db2c7
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/includes/search-not-found-returns-false.js
@@ -0,0 +1,45 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.includes
+description: returns false if the element is not found
+info: |
+  22.1.3.11 Array.prototype.includes ( searchElement [ , fromIndex ] )
+
+    ...
+  5. If n ≥ 0, then
+    a. Let k be n.
+  6. Else n < 0,
+    a. Let k be len + n.
+    b. If k < 0, let k be 0.
+  7. Repeat, while k < len
+    a. Let elementK be the result of ? Get(O, ! ToString(k)).
+    b. If SameValueZero(searchElement, elementK) is true, return true.
+    c. Increase k by 1.
+  8. Return false.
+features: [Symbol, Array.prototype.includes]
+---*/
+
+assert.sameValue([42].includes(43), false, "43");
+
+assert.sameValue(["test262"].includes("test"), false, "string");
+
+assert.sameValue([0, "test262", undefined].includes(""), false, "the empty string");
+
+assert.sameValue(["true", false].includes(true), false, "true");
+assert.sameValue(["", true].includes(false), false, "false");
+
+assert.sameValue([undefined, false, 0, 1].includes(null), false, "null");
+assert.sameValue([null].includes(undefined), false, "undefined");
+
+assert.sameValue([Symbol("1")].includes(Symbol("1")), false, "symbol");
+assert.sameValue([{}].includes({}), false, "object");
+assert.sameValue([
+  []
+].includes([]), false, "array");
+
+var sample = [42];
+assert.sameValue(sample.includes(sample), false, "this");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/includes/shell.js b/js/src/tests/test262/built-ins/Array/prototype/includes/shell.js
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/js/src/tests/test262/built-ins/Array/prototype/includes/sparse.js b/js/src/tests/test262/built-ins/Array/prototype/includes/sparse.js
new file mode 100644
index 0000000000..96e0a6db14
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/includes/sparse.js
@@ -0,0 +1,54 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.includes
+description: Searches all indexes from a sparse array
+info: |
+  22.1.3.11 Array.prototype.includes ( searchElement [ , fromIndex ] )
+
+  ...
+  5. If n ≥ 0, then
+    a. Let k be n.
+  6. Else n < 0,
+    a. Let k be len + n.
+    b. If k < 0, let k be 0.
+  7. Repeat, while k < len
+    a. Let elementK be the result of ? Get(O, ! ToString(k)).
+    b. If SameValueZero(searchElement, elementK) is true, return true.
+    c. Increase k by 1.
+  ...
+features: [Array.prototype.includes]
+---*/
+
+assert.sameValue(
+  [, , , ].includes(undefined),
+  true,
+  "[ , , , ].includes(undefined)"
+);
+
+assert.sameValue(
+  [, , , 42, ].includes(undefined, 4),
+  false,
+  "[ , , , 42, ].includes(undefined, 4)"
+);
+
+var sample = [, , , 42, , ];
+
+assert.sameValue(
+  sample.includes(undefined),
+  true,
+  "sample.includes(undefined)"
+);
+assert.sameValue(
+  sample.includes(undefined, 4),
+  true,
+  "sample.includes(undefined, 4)"
+);
+assert.sameValue(
+  sample.includes(42, 3),
+  true,
+  "sample.includes(42, 3)"
+);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/includes/this-is-not-object.js b/js/src/tests/test262/built-ins/Array/prototype/includes/this-is-not-object.js
new file mode 100644
index 0000000000..c19d2b24a3
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/includes/this-is-not-object.js
@@ -0,0 +1,25 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.includes
+description: >
+  Throws a TypeError exception when `this` cannot be coerced to Object
+info: |
+  22.1.3.11 Array.prototype.includes ( searchElement [ , fromIndex ] )
+
+  1. Let O be ? ToObject(this value).
+  ...
+features: [Array.prototype.includes]
+---*/
+
+var includes = Array.prototype.includes;
+
+assert.throws(TypeError, function() {
+  includes.call(undefined, 42);
+}, "this is undefined");
+
+assert.throws(TypeError, function() {
+  includes.call(null, 42);
+}, "this is null");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/includes/tointeger-fromindex.js b/js/src/tests/test262/built-ins/Array/prototype/includes/tointeger-fromindex.js
new file mode 100644
index 0000000000..3e62e6f620
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/includes/tointeger-fromindex.js
@@ -0,0 +1,55 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.includes
+description: get the integer value from fromIndex
+info: |
+  22.1.3.11 Array.prototype.includes ( searchElement [ , fromIndex ] )
+
+  ...
+  4. Let n be ? ToInteger(fromIndex). (If fromIndex is undefined, this step
+  produces the value 0.)
+  5. If n ≥ 0, then
+    a. Let k be n.
+  ...
+  7. Repeat, while k < len
+    a. Let elementK be the result of ? Get(O, ! ToString(k)).
+    b. If SameValueZero(searchElement, elementK) is true, return true.
+    c. Increase k by 1.
+  8. Return false.
+features: [Array.prototype.includes]
+---*/
+
+var obj = {
+  valueOf: function() {
+    return 1;
+  }
+};
+
+var sample = [42, 43];
+assert.sameValue(sample.includes(42, "1"), false, "string [0]");
+assert.sameValue(sample.includes(43, "1"), true, "string [1]");
+
+assert.sameValue(sample.includes(42, true), false, "true [0]");
+assert.sameValue(sample.includes(43, true), true, "true [1]");
+
+assert.sameValue(sample.includes(42, false), true, "false [0]");
+assert.sameValue(sample.includes(43, false), true, "false [1]");
+
+assert.sameValue(sample.includes(42, NaN), true, "NaN [0]");
+assert.sameValue(sample.includes(43, NaN), true, "NaN [1]");
+
+assert.sameValue(sample.includes(42, null), true, "null [0]");
+assert.sameValue(sample.includes(43, null), true, "null [1]");
+
+assert.sameValue(sample.includes(42, undefined), true, "undefined [0]");
+assert.sameValue(sample.includes(43, undefined), true, "undefined [1]");
+
+assert.sameValue(sample.includes(42, null), true, "null [0]");
+assert.sameValue(sample.includes(43, null), true, "null [1]");
+
+assert.sameValue(sample.includes(42, obj), false, "object [0]");
+assert.sameValue(sample.includes(43, obj), true, "object [1]");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/includes/tolength-length.js b/js/src/tests/test262/built-ins/Array/prototype/includes/tolength-length.js
new file mode 100644
index 0000000000..a2a2fec104
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/includes/tolength-length.js
@@ -0,0 +1,90 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.includes
+description: length value coerced on ToLength
+info: |
+  22.1.3.11 Array.prototype.includes ( searchElement [ , fromIndex ] )
+
+  ...
+  2. Let len be ? ToLength(? Get(O, "length")).
+  ...
+
+  7.1.15 ToLength ( argument )
+
+  1. Let len be ? ToInteger(argument).
+  2. If len ≤ +0, return +0.
+  3. If len is +∞, return 253-1.
+  4. Return min(len, 253-1).
+features: [Array.prototype.includes]
+---*/
+
+var obj = {
+  "0": "a",
+  "1": "b"
+};
+
+obj.length = 0.1;
+assert.sameValue([].includes.call(obj, "a"), false, "0.1");
+
+obj.length = 0.99;
+assert.sameValue([].includes.call(obj, "a"), false, "0.99");
+
+obj.length = 1.00001;
+assert.sameValue([].includes.call(obj, "a"), true, "1.00001");
+
+obj.length = 1.1;
+assert.sameValue([].includes.call(obj, "a"), true, "1.1");
+
+obj.length = "0";
+assert.sameValue([].includes.call(obj, "a"), false, "string '0'");
+
+obj.length = "1";
+assert.sameValue([].includes.call(obj, "a"), true, "string '1', item found");
+
+obj.length = "1";
+assert.sameValue([].includes.call(obj, "b"), false, "string '1', item not found");
+
+obj.length = "2";
+assert.sameValue([].includes.call(obj, "b"), true, "string '2', item found");
+
+obj.length = "";
+assert.sameValue([].includes.call(obj, "a"), false, "the empty string");
+
+obj.length = undefined;
+assert.sameValue([].includes.call(obj, "a"), false, "undefined");
+
+obj.length = NaN;
+assert.sameValue([].includes.call(obj, "a"), false, "NaN");
+
+obj.length = [];
+assert.sameValue([].includes.call(obj, "a"), false, "[]");
+
+obj.length = [1];
+assert.sameValue([].includes.call(obj, "a"), true, "[1]");
+
+obj.length = null;
+assert.sameValue([].includes.call(obj, "a"), false, "null");
+
+obj.length = false;
+assert.sameValue([].includes.call(obj, "a"), false, "false");
+
+obj.length = true;
+assert.sameValue([].includes.call(obj, "a"), true, "true");
+
+obj.length = {
+  valueOf: function() {
+    return 2;
+  }
+};
+assert.sameValue([].includes.call(obj, "b"), true, "ordinary object.valueOf");
+
+obj.length = {
+  toString: function() {
+    return 2;
+  }
+};
+assert.sameValue([].includes.call(obj, "b"), true, "ordinary object.toString");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/includes/using-fromindex.js b/js/src/tests/test262/built-ins/Array/prototype/includes/using-fromindex.js
new file mode 100644
index 0000000000..ea55845ba7
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/includes/using-fromindex.js
@@ -0,0 +1,52 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.includes
+description: Searches using fromIndex
+info: |
+  22.1.3.11 Array.prototype.includes ( searchElement [ , fromIndex ] )
+
+  ...
+  5. If n ≥ 0, then
+    a. Let k be n.
+  6. Else n < 0,
+    a. Let k be len + n.
+    b. If k < 0, let k be 0.
+  7. Repeat, while k < len
+    a. Let elementK be the result of ? Get(O, ! ToString(k)).
+    b. If SameValueZero(searchElement, elementK) is true, return true.
+    c. Increase k by 1.
+  ...
+features: [Array.prototype.includes]
+---*/
+
+var sample = ["a", "b", "c"];
+assert.sameValue(sample.includes("a", 0), true, "includes('a', 0)");
+assert.sameValue(sample.includes("a", 1), false, "includes('a', 1)");
+assert.sameValue(sample.includes("a", 2), false, "includes('a', 2)");
+
+assert.sameValue(sample.includes("b", 0), true, "includes('b', 0)");
+assert.sameValue(sample.includes("b", 1), true, "includes('b', 1)");
+assert.sameValue(sample.includes("b", 2), false, "includes('b', 2)");
+
+assert.sameValue(sample.includes("c", 0), true, "includes('c', 0)");
+assert.sameValue(sample.includes("c", 1), true, "includes('c', 1)");
+assert.sameValue(sample.includes("c", 2), true, "includes('c', 2)");
+
+assert.sameValue(sample.includes("a", -1), false, "includes('a', -1)");
+assert.sameValue(sample.includes("a", -2), false, "includes('a', -2)");
+assert.sameValue(sample.includes("a", -3), true, "includes('a', -3)");
+assert.sameValue(sample.includes("a", -4), true, "includes('a', -4)");
+
+assert.sameValue(sample.includes("b", -1), false, "includes('b', -1)");
+assert.sameValue(sample.includes("b", -2), true, "includes('b', -2)");
+assert.sameValue(sample.includes("b", -3), true, "includes('b', -3)");
+assert.sameValue(sample.includes("b", -4), true, "includes('b', -4)");
+
+assert.sameValue(sample.includes("c", -1), true, "includes('c', -1)");
+assert.sameValue(sample.includes("c", -2), true, "includes('c', -2)");
+assert.sameValue(sample.includes("c", -3), true, "includes('c', -3)");
+assert.sameValue(sample.includes("c", -4), true, "includes('c', -4)");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/includes/values-are-not-cached.js b/js/src/tests/test262/built-ins/Array/prototype/includes/values-are-not-cached.js
new file mode 100644
index 0000000000..229e1f16da
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/includes/values-are-not-cached.js
@@ -0,0 +1,46 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.includes
+description: indexed values are not cached
+info: |
+  22.1.3.11 Array.prototype.includes ( searchElement [ , fromIndex ] )
+
+  ...
+  7. Repeat, while k < len
+    a. Let elementK be the result of ? Get(O, ! ToString(k)).
+  ...
+features: [Array.prototype.includes]
+---*/
+
+function getCleanObj() {
+  var obj = {};
+  Object.defineProperty(obj, "length", {
+    get: function() {
+      Object.defineProperty(obj, "0", {
+        get: function() {
+          obj[1] = "ecma262";
+          obj[2] = "cake";
+          return "tc39";
+        }
+      });
+      return 2;
+    }
+  });
+
+  return obj;
+}
+
+var obj;
+obj = getCleanObj();
+assert.sameValue([].includes.call(obj, "tc39"), true, "'tc39' is true");
+
+obj = getCleanObj();
+assert.sameValue([].includes.call(obj, "ecma262"), true, "'ecma262' is true");
+
+obj = getCleanObj();
+assert.sameValue([].includes.call(obj, "cake"), false, "'cake' is false");
+assert.sameValue(obj[2], "cake", "'2' is set");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-1-1.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-1-1.js
new file mode 100644
index 0000000000..11d3aa8be5
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-1-1.js
@@ -0,0 +1,14 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: Array.prototype.indexOf applied to undefined throws a TypeError
+---*/
+
+
+assert.throws(TypeError, function() {
+  Array.prototype.indexOf.call(undefined);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-1-10.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-1-10.js
new file mode 100644
index 0000000000..932296e6d7
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-1-10.js
@@ -0,0 +1,14 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: Array.prototype.indexOf applied to the Math object
+---*/
+
+Math[1] = true;
+Math.length = 2;
+
+assert.sameValue(Array.prototype.indexOf.call(Math, true), 1, 'Array.prototype.indexOf.call(Math, true)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-1-11.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-1-11.js
new file mode 100644
index 0000000000..2c9aabe034
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-1-11.js
@@ -0,0 +1,15 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: Array.prototype.indexOf applied to Date object
+---*/
+
+var obj = new Date();
+obj.length = 2;
+obj[1] = true;
+
+assert.sameValue(Array.prototype.indexOf.call(obj, true), 1, 'Array.prototype.indexOf.call(obj, true)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-1-12.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-1-12.js
new file mode 100644
index 0000000000..cf772580c3
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-1-12.js
@@ -0,0 +1,15 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: Array.prototype.indexOf applied to RegExp object
+---*/
+
+var obj = new RegExp();
+obj.length = 2;
+obj[1] = true;
+
+assert.sameValue(Array.prototype.indexOf.call(obj, true), 1, 'Array.prototype.indexOf.call(obj, true)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-1-13.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-1-13.js
new file mode 100644
index 0000000000..c5e93fd016
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-1-13.js
@@ -0,0 +1,16 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: Array.prototype.indexOf applied to the JSON object
+---*/
+
+var targetObj = {};
+
+JSON[3] = targetObj;
+JSON.length = 5;
+
+assert.sameValue(Array.prototype.indexOf.call(JSON, targetObj), 3, 'Array.prototype.indexOf.call(JSON, targetObj)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-1-14.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-1-14.js
new file mode 100644
index 0000000000..914b39da96
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-1-14.js
@@ -0,0 +1,15 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: Array.prototype.indexOf applied to Error object
+---*/
+
+var obj = new SyntaxError();
+obj[1] = true;
+obj.length = 2;
+
+assert.sameValue(Array.prototype.indexOf.call(obj, true), 1, 'Array.prototype.indexOf.call(obj, true)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-1-15.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-1-15.js
new file mode 100644
index 0000000000..2574217a04
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-1-15.js
@@ -0,0 +1,16 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: Array.prototype.indexOf applied to Arguments object
+---*/
+
+function fun() {
+  return arguments;
+}
+var obj = fun(1, true, 3);
+
+assert.sameValue(Array.prototype.indexOf.call(obj, true), 1, 'Array.prototype.indexOf.call(obj, true)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-1-2.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-1-2.js
new file mode 100644
index 0000000000..ee6698db14
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-1-2.js
@@ -0,0 +1,14 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: Array.prototype.indexOf applied to null throws a TypeError
+---*/
+
+
+assert.throws(TypeError, function() {
+  Array.prototype.indexOf.call(null);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-1-3.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-1-3.js
new file mode 100644
index 0000000000..3f5658031e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-1-3.js
@@ -0,0 +1,16 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: Array.prototype.indexOf applied to boolean primitive
+---*/
+
+var targetObj = {};
+
+Boolean.prototype[1] = targetObj;
+Boolean.prototype.length = 2;
+
+assert.sameValue(Array.prototype.indexOf.call(true, targetObj), 1, 'Array.prototype.indexOf.call(true, targetObj)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-1-4.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-1-4.js
new file mode 100644
index 0000000000..f09918dd7f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-1-4.js
@@ -0,0 +1,15 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: Array.prototype.indexOf applied to Boolean Object
+---*/
+
+var obj = new Boolean(false);
+obj.length = 2;
+obj[1] = true;
+
+assert.sameValue(Array.prototype.indexOf.call(obj, true), 1, 'Array.prototype.indexOf.call(obj, true)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-1-5.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-1-5.js
new file mode 100644
index 0000000000..5da413e931
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-1-5.js
@@ -0,0 +1,16 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: Array.prototype.indexOf applied to number primitive
+---*/
+
+var targetObj = {};
+
+Number.prototype[1] = targetObj;
+Number.prototype.length = 2;
+
+assert.sameValue(Array.prototype.indexOf.call(5, targetObj), 1, 'Array.prototype.indexOf.call(5, targetObj)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-1-6.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-1-6.js
new file mode 100644
index 0000000000..9a33a67e19
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-1-6.js
@@ -0,0 +1,15 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: Array.prototype.indexOf applied to Number object
+---*/
+
+var obj = new Number(-3);
+obj.length = 2;
+obj[1] = true;
+
+assert.sameValue(Array.prototype.indexOf.call(obj, true), 1, 'Array.prototype.indexOf.call(obj, true)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-1-7.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-1-7.js
new file mode 100644
index 0000000000..153ac82af6
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-1-7.js
@@ -0,0 +1,11 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: Array.prototype.indexOf applied to string primitive
+---*/
+
+assert.sameValue(Array.prototype.indexOf.call("abc", "b"), 1, 'Array.prototype.indexOf.call("abc", "b")');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-1-8.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-1-8.js
new file mode 100644
index 0000000000..6b1a41b797
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-1-8.js
@@ -0,0 +1,13 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: Array.prototype.indexOf applied to String object
+---*/
+
+var obj = new String("null");
+
+assert.sameValue(Array.prototype.indexOf.call(obj, 'l'), 2, 'Array.prototype.indexOf.call(obj, "l")');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-1-9.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-1-9.js
new file mode 100644
index 0000000000..15dfa49518
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-1-9.js
@@ -0,0 +1,16 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: Array.prototype.indexOf applied to Function object
+---*/
+
+var obj = function(a, b) {
+  return a + b;
+};
+obj[1] = true;
+
+assert.sameValue(Array.prototype.indexOf.call(obj, true), 1, 'Array.prototype.indexOf.call(obj, true)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-10-1.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-10-1.js
new file mode 100644
index 0000000000..40f4f5b72d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-10-1.js
@@ -0,0 +1,31 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf returns -1 for elements not present in
+    array
+---*/
+
+var a = new Array();
+a[100] = 1;
+a[99999] = "";
+a[10] = new Object();
+a[5555] = 5.5;
+a[123456] = "str";
+a[5] = 1E+309;
+
+assert.sameValue(a.indexOf(1), 100, 'a.indexOf(1)');
+assert.sameValue(a.indexOf(""), 99999, 'a.indexOf("")');
+assert.sameValue(a.indexOf("str"), 123456, 'a.indexOf("str")');
+assert.sameValue(a.indexOf(1E+309), 5, 'a.indexOf(1E+309)'); //Infinity
+assert.sameValue(a.indexOf(5.5), 5555, 'a.indexOf(5.5)');
+
+assert.sameValue(a.indexOf(true), -1, 'a.indexOf(true)');
+assert.sameValue(a.indexOf(5), -1, 'a.indexOf(5)');
+assert.sameValue(a.indexOf("str1"), -1, 'a.indexOf("str1")');
+assert.sameValue(a.indexOf(null), -1, 'a.indexOf(null)');
+assert.sameValue(a.indexOf(new Object()), -1, 'a.indexOf(new Object())');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-10-2.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-10-2.js
new file mode 100644
index 0000000000..ff0e89ed06
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-10-2.js
@@ -0,0 +1,29 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf returns -1 if 'length' is 0 and does not
+    access any other properties
+---*/
+
+var accessed = false;
+var f = {
+  length: 0
+};
+Object.defineProperty(f, "0", {
+  get: function() {
+    accessed = true;
+    return 1;
+  }
+});
+
+
+var i = Array.prototype.indexOf.call(f, 1);
+
+
+assert.sameValue(i, -1, 'i');
+assert.sameValue(accessed, false, 'accessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-2-1.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-2-1.js
new file mode 100644
index 0000000000..5f430eb93e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-2-1.js
@@ -0,0 +1,23 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf - 'length' is own data property on an
+    Array-like object
+---*/
+
+var objOne = {
+  1: true,
+  length: 2
+};
+var objTwo = {
+  2: true,
+  length: 2
+};
+
+assert.sameValue(Array.prototype.indexOf.call(objOne, true), 1, 'Array.prototype.indexOf.call(objOne, true)');
+assert.sameValue(Array.prototype.indexOf.call(objTwo, true), -1, 'Array.prototype.indexOf.call(objTwo, true)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-2-10.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-2-10.js
new file mode 100644
index 0000000000..d7a505975a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-2-10.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: Array.prototype.indexOf - 'length' is inherited accessor property
+---*/
+
+var proto = {};
+Object.defineProperty(proto, "length", {
+  get: function() {
+    return 2;
+  },
+  configurable: true
+});
+
+var Con = function() {};
+Con.prototype = proto;
+
+var childOne = new Con();
+childOne[1] = true;
+var childTwo = new Con();
+childTwo[2] = true;
+
+assert.sameValue(Array.prototype.indexOf.call(childOne, true), 1, 'Array.prototype.indexOf.call(childOne, true)');
+assert.sameValue(Array.prototype.indexOf.call(childTwo, true), -1, 'Array.prototype.indexOf.call(childTwo, true)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-2-11.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-2-11.js
new file mode 100644
index 0000000000..d876195f4a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-2-11.js
@@ -0,0 +1,21 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf - 'length' is own accessor property
+    without a get function
+---*/
+
+var obj = {
+  1: true
+};
+Object.defineProperty(obj, "length", {
+  set: function() {},
+  configurable: true
+});
+
+assert.sameValue(Array.prototype.indexOf.call(obj, true), -1, 'Array.prototype.indexOf.call(obj, true)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-2-12.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-2-12.js
new file mode 100644
index 0000000000..5deb0792f2
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-2-12.js
@@ -0,0 +1,29 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf - 'length' is own accessor property
+    without a get function that overrides an inherited accessor
+    property
+---*/
+
+Object.defineProperty(Object.prototype, "length", {
+  get: function() {
+    return 20;
+  },
+  configurable: true
+});
+
+var obj = {
+  1: 1
+};
+Object.defineProperty(obj, "length", {
+  set: function() {},
+  configurable: true
+});
+
+assert.sameValue(Array.prototype.indexOf.call(obj, 1), -1, 'Array.prototype.indexOf.call(obj, 1)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-2-13.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-2-13.js
new file mode 100644
index 0000000000..e5cc36b827
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-2-13.js
@@ -0,0 +1,25 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf - 'length' is inherited accessor property
+    without a get function
+---*/
+
+var proto = {};
+Object.defineProperty(proto, "length", {
+  set: function() {},
+  configurable: true
+});
+
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+child[1] = true;
+
+assert.sameValue(Array.prototype.indexOf.call(child, true), -1, 'Array.prototype.indexOf.call(child, true)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-2-14.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-2-14.js
new file mode 100644
index 0000000000..a19d2b0bf2
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-2-14.js
@@ -0,0 +1,16 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: Array.prototype.indexOf - 'length' is undefined property
+---*/
+
+var obj = {
+  0: true,
+  1: true
+};
+
+assert.sameValue(Array.prototype.indexOf.call(obj, true), -1, 'Array.prototype.indexOf.call(obj, true)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-2-17.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-2-17.js
new file mode 100644
index 0000000000..56d42df41f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-2-17.js
@@ -0,0 +1,19 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf applied to Arguments object which
+    implements its own property get method
+---*/
+
+var func = function(a, b) {
+  arguments[2] = false;
+  return Array.prototype.indexOf.call(arguments, true) === 1 &&
+    Array.prototype.indexOf.call(arguments, false) === -1;
+};
+
+assert(func(0, true), 'func(0, true) !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-2-18.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-2-18.js
new file mode 100644
index 0000000000..ed303ebe80
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-2-18.js
@@ -0,0 +1,18 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf applied to String object, which implements
+    its own property get method
+---*/
+
+var str = new String("012");
+
+String.prototype[3] = "3";
+
+assert.sameValue(Array.prototype.indexOf.call(str, "2"), 2, 'Array.prototype.indexOf.call(str, "2")');
+assert.sameValue(Array.prototype.indexOf.call(str, "3"), -1, 'Array.prototype.indexOf.call(str, "3")');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-2-19.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-2-19.js
new file mode 100644
index 0000000000..2fa1f2a27b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-2-19.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf applied to Function object which
+    implements its own property get method
+---*/
+
+var obj = function(a, b) {
+  return a + b;
+};
+obj[1] = "b";
+obj[2] = "c";
+
+assert.sameValue(Array.prototype.indexOf.call(obj, obj[1]), 1, 'Array.prototype.indexOf.call(obj, obj[1])');
+assert.sameValue(Array.prototype.indexOf.call(obj, obj[2]), -1, 'Array.prototype.indexOf.call(obj, obj[2])');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-2-2.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-2-2.js
new file mode 100644
index 0000000000..8960e5980d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-2-2.js
@@ -0,0 +1,17 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: Array.prototype.indexOf - 'length' is own data property on an Array
+---*/
+
+var targetObj = {};
+
+Array.prototype[2] = targetObj;
+
+
+assert.sameValue([0, targetObj].indexOf(targetObj), 1, '[0, targetObj].indexOf(targetObj)');
+assert.sameValue([0, 1].indexOf(targetObj), -1, '[0, 1].indexOf(targetObj)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-2-3.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-2-3.js
new file mode 100644
index 0000000000..e1d5ca85fa
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-2-3.js
@@ -0,0 +1,24 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf - 'length' is own data property that
+    overrides an inherited data property on an Array-like object
+---*/
+
+var proto = {
+  length: 0
+};
+
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+child.length = 2;
+child[1] = true;
+
+assert.sameValue(Array.prototype.indexOf.call(child, true), 1, 'Array.prototype.indexOf.call(child, true)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-2-4.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-2-4.js
new file mode 100644
index 0000000000..0763674b85
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-2-4.js
@@ -0,0 +1,19 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf - 'length' is own data property that
+    overrides an inherited data property on an Array
+---*/
+
+var targetObj = {};
+var arrProtoLen;
+
+arrProtoLen = Array.prototype.length;
+Array.prototype.length = 0;
+
+assert.sameValue([0, targetObj].indexOf(targetObj), 1, '[0, targetObj].indexOf(targetObj)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-2-5.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-2-5.js
new file mode 100644
index 0000000000..44cdad1edd
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-2-5.js
@@ -0,0 +1,32 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf - 'length' is own data property that
+    overrides an inherited accessor property on an Array-like object
+---*/
+
+var proto = {};
+Object.defineProperty(proto, "length", {
+  get: function() {
+    return 0;
+  },
+  configurable: true
+});
+
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+
+Object.defineProperty(child, "length", {
+  value: 2,
+  configurable: true
+});
+child[1] = true;
+
+assert.sameValue(Array.prototype.indexOf.call(child, true), 1, 'Array.prototype.indexOf.call(child, true)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-2-6.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-2-6.js
new file mode 100644
index 0000000000..b33bf0b3cc
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-2-6.js
@@ -0,0 +1,24 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: Array.prototype.indexOf - 'length' is an inherited data property
+---*/
+
+var proto = {
+  length: 2
+};
+
+var Con = function() {};
+Con.prototype = proto;
+
+var childOne = new Con();
+childOne[1] = true;
+var childTwo = new Con();
+childTwo[2] = true;
+
+assert.sameValue(Array.prototype.indexOf.call(childOne, true), 1, 'Array.prototype.indexOf.call(childOne, true)');
+assert.sameValue(Array.prototype.indexOf.call(childTwo, true), -1, 'Array.prototype.indexOf.call(childTwo, true)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-2-7.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-2-7.js
new file mode 100644
index 0000000000..4b30c60aca
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-2-7.js
@@ -0,0 +1,31 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: Array.prototype.indexOf - 'length' is own accessor property
+---*/
+
+var objOne = {
+  1: true
+};
+var objTwo = {
+  2: true
+};
+Object.defineProperty(objOne, "length", {
+  get: function() {
+    return 2;
+  },
+  configurable: true
+});
+Object.defineProperty(objTwo, "length", {
+  get: function() {
+    return 2;
+  },
+  configurable: true
+});
+
+assert.sameValue(Array.prototype.indexOf.call(objOne, true), 1, 'Array.prototype.indexOf.call(objOne, true)');
+assert.sameValue(Array.prototype.indexOf.call(objTwo, true), -1, 'Array.prototype.indexOf.call(objTwo, true)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-2-8.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-2-8.js
new file mode 100644
index 0000000000..b0a5771654
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-2-8.js
@@ -0,0 +1,30 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf - 'length' is own accessor property that
+    overrides an inherited data property
+---*/
+
+var proto = {
+  length: 0
+};
+
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+child[1] = true;
+
+Object.defineProperty(child, "length", {
+  get: function() {
+    return 2;
+  },
+  configurable: true
+});
+
+assert.sameValue(Array.prototype.indexOf.call(child, true), 1, 'Array.prototype.indexOf.call(child, true)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-2-9.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-2-9.js
new file mode 100644
index 0000000000..cae4411018
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-2-9.js
@@ -0,0 +1,34 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf - 'length' is own accessor property that
+    overrides an inherited accessor property
+---*/
+
+var proto = {};
+Object.defineProperty(proto, "length", {
+  get: function() {
+    return 0;
+  },
+  configurable: true
+});
+
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+child[1] = true;
+
+Object.defineProperty(child, "length", {
+  get: function() {
+    return 2;
+  },
+  configurable: true
+});
+
+assert.sameValue(Array.prototype.indexOf.call(child, true), 1, 'Array.prototype.indexOf.call(child, true)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-3-1.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-3-1.js
new file mode 100644
index 0000000000..38c611d40a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-3-1.js
@@ -0,0 +1,17 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: Array.prototype.indexOf - value of 'length' is undefined
+---*/
+
+var obj = {
+  0: 1,
+  1: 1,
+  length: undefined
+};
+
+assert.sameValue(Array.prototype.indexOf.call(obj, 1), -1, 'Array.prototype.indexOf.call(obj, 1)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-3-10.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-3-10.js
new file mode 100644
index 0000000000..6f8df06b3e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-3-10.js
@@ -0,0 +1,18 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf - value of 'length' is number primitive
+    (value is NaN)
+---*/
+
+var obj = {
+  0: 0,
+  length: NaN
+};
+
+assert.sameValue(Array.prototype.indexOf.call(obj, 0), -1, 'Array.prototype.indexOf.call(obj, 0)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-3-11.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-3-11.js
new file mode 100644
index 0000000000..8bcd52ab94
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-3-11.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf - 'length' is a string containing a
+    positive number
+---*/
+
+var obj = {
+  1: 1,
+  2: 2,
+  length: "2"
+};
+
+assert.sameValue(Array.prototype.indexOf.call(obj, 1), 1, 'Array.prototype.indexOf.call(obj, 1)');
+assert.sameValue(Array.prototype.indexOf.call(obj, 2), -1, 'Array.prototype.indexOf.call(obj, 2)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-3-12.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-3-12.js
new file mode 100644
index 0000000000..684104f500
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-3-12.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf - 'length' is a string containing a
+    negative number
+---*/
+
+var obj = {
+  1: "true",
+  2: "2",
+  length: "-4294967294"
+};
+
+assert.sameValue(Array.prototype.indexOf.call(obj, "true"), -1, 'Array.prototype.indexOf.call(obj, "true")');
+assert.sameValue(Array.prototype.indexOf.call(obj, "2"), -1, 'Array.prototype.indexOf.call(obj, "2")');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-3-13.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-3-13.js
new file mode 100644
index 0000000000..aca8a750c1
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-3-13.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf - 'length' is a string containing a
+    decimal number
+---*/
+
+var obj = {
+  199: true,
+  200: "200.59",
+  length: "200.59"
+};
+
+assert.sameValue(Array.prototype.indexOf.call(obj, true), 199, 'Array.prototype.indexOf.call(obj, true)');
+assert.sameValue(Array.prototype.indexOf.call(obj, "200.59"), -1, 'Array.prototype.indexOf.call(obj, "200.59")');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-3-14.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-3-14.js
new file mode 100644
index 0000000000..6a86141571
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-3-14.js
@@ -0,0 +1,31 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf - 'length' is a string containing
+    +/-Infinity
+---*/
+
+var objOne = {
+  0: true,
+  1: true,
+  length: "Infinity"
+};
+var objTwo = {
+  0: true,
+  1: true,
+  length: "+Infinity"
+};
+var objThree = {
+  0: true,
+  1: true,
+  length: "-Infinity"
+};
+
+assert.sameValue(Array.prototype.indexOf.call(objOne, true), 0, 'Array.prototype.indexOf.call(objOne, true)');
+assert.sameValue(Array.prototype.indexOf.call(objTwo, true), 0, 'Array.prototype.indexOf.call(objTwo, true)');
+assert.sameValue(Array.prototype.indexOf.call(objThree, true), -1, 'Array.prototype.indexOf.call(objThree, true)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-3-15.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-3-15.js
new file mode 100644
index 0000000000..481724876c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-3-15.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf - 'length' is a string containing an
+    exponential number
+---*/
+
+var obj = {
+  1: true,
+  2: "2E0",
+  length: "2E0"
+};
+
+assert.sameValue(Array.prototype.indexOf.call(obj, true), 1, 'Array.prototype.indexOf.call(obj, true)');
+assert.sameValue(Array.prototype.indexOf.call(obj, "2E0"), -1, 'Array.prototype.indexOf.call(obj, "2E0")');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-3-16.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-3-16.js
new file mode 100644
index 0000000000..066d22de39
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-3-16.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf - 'length' is a string containing a hex
+    number
+---*/
+
+var obj = {
+  10: true,
+  11: "0x00B",
+  length: "0x00B"
+};
+
+assert.sameValue(Array.prototype.indexOf.call(obj, true), 10, 'Array.prototype.indexOf.call(obj, true)');
+assert.sameValue(Array.prototype.indexOf.call(obj, "0x00B"), -1, 'Array.prototype.indexOf.call(obj, "0x00B")');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-3-17.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-3-17.js
new file mode 100644
index 0000000000..58c9e6f383
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-3-17.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf - 'length' is a string containing a number
+    with leading zeros
+---*/
+
+var obj = {
+  1: true,
+  2: "0002.0",
+  length: "0002.0"
+};
+
+assert.sameValue(Array.prototype.indexOf.call(obj, true), 1, 'Array.prototype.indexOf.call(obj, true)');
+assert.sameValue(Array.prototype.indexOf.call(obj, "0002.0"), -1, 'Array.prototype.indexOf.call(obj, "0002.0")');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-3-18.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-3-18.js
new file mode 100644
index 0000000000..c598a7a809
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-3-18.js
@@ -0,0 +1,19 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf - value of 'length' is a string that can't
+    convert to a number
+---*/
+
+var obj = {
+  0: true,
+  100: true,
+  length: "one"
+};
+
+assert.sameValue(Array.prototype.indexOf.call(obj, true), -1, 'Array.prototype.indexOf.call(obj, true)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-3-19.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-3-19.js
new file mode 100644
index 0000000000..f834b12a4d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-3-19.js
@@ -0,0 +1,31 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf - value of 'length' is an Object which has
+    an own toString method.
+---*/
+
+// objects inherit the default valueOf() method from Object
+// that simply returns itself. Since the default valueOf() method
+// does not return a primitive value, ES next tries to convert the object
+// to a number by calling its toString() method and converting the
+// resulting string to a number.
+
+var obj = {
+  1: true,
+  2: 2,
+
+  length: {
+    toString: function() {
+      return '2';
+    }
+  }
+};
+
+assert.sameValue(Array.prototype.indexOf.call(obj, true), 1, 'Array.prototype.indexOf.call(obj, true)');
+assert.sameValue(Array.prototype.indexOf.call(obj, 2), -1, 'Array.prototype.indexOf.call(obj, 2)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-3-2.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-3-2.js
new file mode 100644
index 0000000000..b438683c94
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-3-2.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf return -1 when 'length' is a boolean
+    (value is true)
+---*/
+
+var obj = {
+  0: 0,
+  1: 1,
+  length: true
+};
+
+assert.sameValue(Array.prototype.indexOf.call(obj, 0), 0, 'Array.prototype.indexOf.call(obj, 0)');
+assert.sameValue(Array.prototype.indexOf.call(obj, 1), -1, 'Array.prototype.indexOf.call(obj, 1)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-3-20.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-3-20.js
new file mode 100644
index 0000000000..48791bba4f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-3-20.js
@@ -0,0 +1,25 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf - value of 'length' is an Object which has
+    an own valueOf method.
+---*/
+
+//valueOf method will be invoked first, since hint is Number
+var obj = {
+  1: true,
+  2: 2,
+  length: {
+    valueOf: function() {
+      return 2;
+    }
+  }
+};
+
+assert.sameValue(Array.prototype.indexOf.call(obj, true), 1, 'Array.prototype.indexOf.call(obj, true)');
+assert.sameValue(Array.prototype.indexOf.call(obj, 2), -1, 'Array.prototype.indexOf.call(obj, 2)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-3-21.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-3-21.js
new file mode 100644
index 0000000000..fe7f644a30
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-3-21.js
@@ -0,0 +1,34 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf - 'length' is an object that has an own
+    valueOf method that returns an object and toString method that
+    returns a string
+---*/
+
+var toStringAccessed = false;
+var valueOfAccessed = false;
+
+var obj = {
+  1: true,
+  length: {
+    toString: function() {
+      toStringAccessed = true;
+      return '2';
+    },
+
+    valueOf: function() {
+      valueOfAccessed = true;
+      return {};
+    }
+  }
+};
+
+assert.sameValue(Array.prototype.indexOf.call(obj, true), 1, 'Array.prototype.indexOf.call(obj, true)');
+assert(toStringAccessed, 'toStringAccessed !== true');
+assert(valueOfAccessed, 'valueOfAccessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-3-22.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-3-22.js
new file mode 100644
index 0000000000..8ac4dbac5f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-3-22.js
@@ -0,0 +1,36 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf throws TypeError exception when 'length'
+    is an object with toString and valueOf methods that don�t return
+    primitive values
+---*/
+
+var toStringAccessed = false;
+var valueOfAccessed = false;
+
+var obj = {
+  length: {
+    toString: function() {
+      toStringAccessed = true;
+      return {};
+    },
+
+    valueOf: function() {
+      valueOfAccessed = true;
+      return {};
+    }
+  }
+};
+
+assert.throws(TypeError, function() {
+  Array.prototype.indexOf.call(obj);
+});
+
+assert(toStringAccessed, 'toStringAccessed');
+assert(valueOfAccessed, 'valueOfAccessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-3-23.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-3-23.js
new file mode 100644
index 0000000000..68cf078ae0
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-3-23.js
@@ -0,0 +1,40 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf uses inherited valueOf method when
+    'length' is an object with an own toString and inherited valueOf
+    methods
+---*/
+
+var toStringAccessed = false;
+var valueOfAccessed = false;
+
+var proto = {
+  valueOf: function() {
+    valueOfAccessed = true;
+    return 2;
+  }
+};
+
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+child.toString = function() {
+  toStringAccessed = true;
+  return 2;
+};
+
+var obj = {
+  1: true,
+  length: child
+};
+
+assert.sameValue(Array.prototype.indexOf.call(obj, true), 1, 'Array.prototype.indexOf.call(obj, true)');
+assert(valueOfAccessed, 'valueOfAccessed !== true');
+assert.sameValue(toStringAccessed, false, 'toStringAccessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-3-24.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-3-24.js
new file mode 100644
index 0000000000..7cf673cc83
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-3-24.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf - value of 'length' is a positive
+    non-integer, ensure truncation occurs in the proper direction
+---*/
+
+var obj = {
+  122: true,
+  123: false,
+  length: 123.321
+}; //length will be 123 finally
+
+assert.sameValue(Array.prototype.indexOf.call(obj, true), 122, 'Array.prototype.indexOf.call(obj, true)');
+assert.sameValue(Array.prototype.indexOf.call(obj, false), -1, 'Array.prototype.indexOf.call(obj, false)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-3-25.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-3-25.js
new file mode 100644
index 0000000000..a1bf7103ce
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-3-25.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf - value of 'length' is a negative
+    non-integer
+---*/
+
+var obj = {
+  1: true,
+  2: false,
+  length: -4294967294.5
+}; //length will be 0 finally
+
+assert.sameValue(Array.prototype.indexOf.call(obj, true), -1, 'Array.prototype.indexOf.call(obj, true)');
+assert.sameValue(Array.prototype.indexOf.call(obj, false), -1, 'Array.prototype.indexOf.call(obj, false)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-3-28.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-3-28.js
new file mode 100644
index 0000000000..e28525b7e5
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-3-28.js
@@ -0,0 +1,21 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf - value of 'length' is boundary value
+    (2^32)
+---*/
+
+var targetObj = {};
+var obj = {
+  0: targetObj,
+  4294967294: targetObj,
+  4294967295: targetObj,
+  length: 4294967296
+};
+
+assert.sameValue(Array.prototype.indexOf.call(obj, targetObj), 0, 'Array.prototype.indexOf.call(obj, targetObj)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-3-29.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-3-29.js
new file mode 100644
index 0000000000..5995fcdea1
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-3-29.js
@@ -0,0 +1,21 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf - value of 'length' is boundary value
+    (2^32 + 1)
+---*/
+
+var targetObj = {};
+var obj = {
+  0: targetObj,
+  1: 4294967297,
+  length: 4294967297
+};
+
+assert.sameValue(Array.prototype.indexOf.call(obj, targetObj), 0, 'Array.prototype.indexOf.call(obj, targetObj)');
+assert.sameValue(Array.prototype.indexOf.call(obj, 4294967297), 1, 'Array.prototype.indexOf.call(obj, 4294967297)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-3-3.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-3-3.js
new file mode 100644
index 0000000000..8c3b35aee3
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-3-3.js
@@ -0,0 +1,18 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf - value of 'length' is a number (value is
+    0)
+---*/
+
+var obj = {
+  0: true,
+  length: 0
+};
+
+assert.sameValue(Array.prototype.indexOf.call(obj, true), -1, 'Array.prototype.indexOf.call(obj, true)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-3-4.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-3-4.js
new file mode 100644
index 0000000000..0b256c079b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-3-4.js
@@ -0,0 +1,18 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf - value of 'length' is a number (value is
+    +0)
+---*/
+
+var obj = {
+  0: true,
+  length: +0
+};
+
+assert.sameValue(Array.prototype.indexOf.call(obj, true), -1, 'Array.prototype.indexOf.call(obj, true)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-3-5.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-3-5.js
new file mode 100644
index 0000000000..eadd3f14ab
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-3-5.js
@@ -0,0 +1,18 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf - value of 'length' is a number (value is
+    -0)
+---*/
+
+var obj = {
+  0: true,
+  length: -0
+};
+
+assert.sameValue(Array.prototype.indexOf.call(obj, true), -1, 'Array.prototype.indexOf.call(obj, true)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-3-6.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-3-6.js
new file mode 100644
index 0000000000..4ce21bcb8d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-3-6.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf - value of 'length' is a number (value is
+    positive)
+---*/
+
+var obj = {
+  3: true,
+  4: false,
+  length: 4
+};
+
+assert.sameValue(Array.prototype.indexOf.call(obj, true), 3, 'Array.prototype.indexOf.call(obj, true)');
+assert.sameValue(Array.prototype.indexOf.call(obj, false), -1, 'Array.prototype.indexOf.call(obj, false)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-3-7.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-3-7.js
new file mode 100644
index 0000000000..837a6e173c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-3-7.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf - value of 'length' is a number (value is
+    negative)
+---*/
+
+var obj = {
+  4: true,
+  5: false,
+  length: 5 - Math.pow(2, 32)
+};
+
+assert.sameValue(Array.prototype.indexOf.call(obj, true), -1, 'Array.prototype.indexOf.call(obj, true)');
+assert.sameValue(Array.prototype.indexOf.call(obj, false), -1, 'Array.prototype.indexOf.call(obj, false)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-3-8.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-3-8.js
new file mode 100644
index 0000000000..ecd7ab5a23
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-3-8.js
@@ -0,0 +1,18 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf - value of 'length' is a number (value is
+    Infinity)
+---*/
+
+var obj = {
+  0: 0,
+  length: Infinity
+};
+
+assert.sameValue(Array.prototype.indexOf.call(obj, 0), 0, 'Array.prototype.indexOf.call(obj, 0)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-3-9.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-3-9.js
new file mode 100644
index 0000000000..f8b8d27f6f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-3-9.js
@@ -0,0 +1,18 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf - value of 'length' is a number (value is
+    -Infinity)
+---*/
+
+var obj = {
+  0: 0,
+  length: -Infinity
+};
+
+assert.sameValue(Array.prototype.indexOf.call(obj, 0), -1, 'Array.prototype.indexOf.call(obj, 0)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-4-1.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-4-1.js
new file mode 100644
index 0000000000..5662545bfe
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-4-1.js
@@ -0,0 +1,13 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: Array.prototype.indexOf returns -1 if 'length' is 0 (empty array)
+---*/
+
+var i = [].indexOf(42);
+
+assert.sameValue(i, -1, 'i');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-4-10.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-4-10.js
new file mode 100644
index 0000000000..852ab80528
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-4-10.js
@@ -0,0 +1,18 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: Array.prototype.indexOf - 'length' is a number of value -6e-1
+---*/
+
+var targetObj = [];
+var obj = {
+  0: targetObj,
+  100: targetObj,
+  length: -6e-1
+};
+
+assert.sameValue(Array.prototype.indexOf.call(obj, targetObj), -1, 'Array.prototype.indexOf.call(obj, targetObj)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-4-11.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-4-11.js
new file mode 100644
index 0000000000..29c47ac5f8
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-4-11.js
@@ -0,0 +1,18 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: Array.prototype.indexOf - 'length' is an empty string
+---*/
+
+var targetObj = [];
+var obj = {
+  0: targetObj,
+  100: targetObj,
+  length: ""
+};
+
+assert.sameValue(Array.prototype.indexOf.call(obj, targetObj), -1, 'Array.prototype.indexOf.call(obj, targetObj)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-4-2.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-4-2.js
new file mode 100644
index 0000000000..5ea615ce0c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-4-2.js
@@ -0,0 +1,18 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf returns -1 if 'length' is 0 ( length
+    overridden to null (type conversion))
+---*/
+
+var i = Array.prototype.indexOf.call({
+  length: null
+}, 1);
+
+
+assert.sameValue(i, -1, 'i');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-4-3.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-4-3.js
new file mode 100644
index 0000000000..edf2191577
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-4-3.js
@@ -0,0 +1,18 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf returns -1 if 'length' is 0 (length
+    overridden to false (type conversion))
+---*/
+
+var i = Array.prototype.indexOf.call({
+  length: false
+}, 1);
+
+
+assert.sameValue(i, -1, 'i');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-4-4.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-4-4.js
new file mode 100644
index 0000000000..bc3c408e4a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-4-4.js
@@ -0,0 +1,18 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf returns -1 if 'length' is 0 (generic
+    'array' with length 0 )
+---*/
+
+var i = Array.prototype.indexOf.call({
+  length: 0
+}, 1);
+
+
+assert.sameValue(i, -1, 'i');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-4-5.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-4-5.js
new file mode 100644
index 0000000000..1c99c2fce5
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-4-5.js
@@ -0,0 +1,18 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf returns -1 if 'length' is 0 ( length
+    overridden to '0' (type conversion))
+---*/
+
+var i = Array.prototype.indexOf.call({
+  length: '0'
+}, 1);
+
+
+assert.sameValue(i, -1, 'i');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-4-6.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-4-6.js
new file mode 100644
index 0000000000..f907ebe0ad
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-4-6.js
@@ -0,0 +1,22 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf returns -1 if 'length' is 0 (subclassed
+    Array, length overridden with obj with valueOf)
+---*/
+
+var i = Array.prototype.indexOf.call({
+  length: {
+    valueOf: function() {
+      return 0;
+    }
+  }
+}, 1);
+
+
+assert.sameValue(i, -1, 'i');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-4-7.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-4-7.js
new file mode 100644
index 0000000000..c9b7d46cbe
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-4-7.js
@@ -0,0 +1,27 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf returns -1 if 'length' is 0 ( length is
+    object overridden with obj w/o valueOf (toString))
+---*/
+
+// objects inherit the default valueOf method of the Object object;
+// that simply returns the itself. Since the default valueOf() method
+// does not return a primitive value, ES next tries to convert the object
+// to a number by calling its toString() method and converting the
+// resulting string to a number.
+var i = Array.prototype.indexOf.call({
+  length: {
+    toString: function() {
+      return '0';
+    }
+  }
+}, 1);
+
+
+assert.sameValue(i, -1, 'i');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-4-8.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-4-8.js
new file mode 100644
index 0000000000..1d182ed052
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-4-8.js
@@ -0,0 +1,31 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf returns -1 if 'length' is 0 (length is an
+    empty array)
+---*/
+
+// objects inherit the default valueOf method of the Object object;
+// that simply returns the itself. Since the default valueOf() method
+// does not return a primitive value, ES next tries to convert the object
+// to a number by calling its toString() method and converting the
+// resulting string to a number.
+//
+// The toString( ) method on Array converts the array elements to strings,
+// then returns the result of concatenating these strings, with commas in
+// between. An array with no elements converts to the empty string, which
+// converts to the number 0. If an array has a single element that is a
+// number n, the array converts to a string representation of n, which is
+// then converted back to n itself. If an array contains more than one element,
+// or if its one element is not a number, the array converts to NaN.
+var i = Array.prototype.indexOf.call({
+  length: []
+}, 1);
+
+
+assert.sameValue(i, -1, 'i');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-4-9.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-4-9.js
new file mode 100644
index 0000000000..507aac7fcf
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-4-9.js
@@ -0,0 +1,18 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: Array.prototype.indexOf - 'length' is a number of value 0.1
+---*/
+
+var targetObj = [];
+var obj = {
+  0: targetObj,
+  100: targetObj,
+  length: 0.1
+};
+
+assert.sameValue(Array.prototype.indexOf.call(obj, targetObj), -1, 'Array.prototype.indexOf.call(obj, targetObj)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-5-1.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-5-1.js
new file mode 100644
index 0000000000..0b535ee0a1
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-5-1.js
@@ -0,0 +1,14 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: Array.prototype.indexOf when fromIndex is string
+---*/
+
+var a = [1, 2, 1, 2, 1, 2];
+
+assert.sameValue(a.indexOf(2, "2"), 3, '"2" resolves to 2');
+assert.sameValue(a.indexOf(2, "one"), 1, '"one" resolves to 0');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-5-10.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-5-10.js
new file mode 100644
index 0000000000..d482884a09
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-5-10.js
@@ -0,0 +1,16 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf - value of 'fromIndex' is a number (value
+    is positive number)
+---*/
+
+var targetObj = {};
+
+assert.sameValue([0, targetObj, 2].indexOf(targetObj, 2), -1, '[0, targetObj, 2].indexOf(targetObj, 2)');
+assert.sameValue([0, 1, targetObj].indexOf(targetObj, 2), 2, '[0, 1, targetObj].indexOf(targetObj, 2)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-5-11.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-5-11.js
new file mode 100644
index 0000000000..dffaa0859f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-5-11.js
@@ -0,0 +1,16 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf - value of 'fromIndex' is a number (value
+    is negative number)
+---*/
+
+var targetObj = {};
+
+assert.sameValue([0, targetObj, 2].indexOf(targetObj, -1), -1, '[0, targetObj, 2].indexOf(targetObj, -1)');
+assert.sameValue([0, 1, targetObj].indexOf(targetObj, -1), 2, '[0, 1, targetObj].indexOf(targetObj, -1)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-5-12.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-5-12.js
new file mode 100644
index 0000000000..2c3fd1e947
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-5-12.js
@@ -0,0 +1,16 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf - value of 'fromIndex' is a number (value
+    is Infinity)
+---*/
+
+var arr = [];
+arr[Math.pow(2, 32) - 2] = true; //length is the max value of Uint type
+
+assert.sameValue(arr.indexOf(true, Infinity), -1, 'arr.indexOf(true, Infinity)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-5-13.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-5-13.js
new file mode 100644
index 0000000000..c144730ac2
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-5-13.js
@@ -0,0 +1,13 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf - value of 'fromIndex' is a number (value
+    is -Infinity)
+---*/
+
+assert.sameValue([true].indexOf(true, -Infinity), 0, '[true].indexOf(true, -Infinity)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-5-14.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-5-14.js
new file mode 100644
index 0000000000..f7c424bda2
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-5-14.js
@@ -0,0 +1,14 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf - value of 'fromIndex' is a number (value
+    is NaN)
+---*/
+
+assert.sameValue([true].indexOf(true, NaN), 0, '[true].indexOf(true, NaN)');
+assert.sameValue([true].indexOf(true, -NaN), 0, '[true].indexOf(true, -NaN)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-5-15.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-5-15.js
new file mode 100644
index 0000000000..555cb704a9
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-5-15.js
@@ -0,0 +1,14 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf - value of 'fromIndex' is a string
+    containing a negative number
+---*/
+
+assert.sameValue([0, true, 2].indexOf(true, "-1"), -1, '[0, true, 2].indexOf(true, "-1")');
+assert.sameValue([0, 1, true].indexOf(true, "-1"), 2, '[0, 1, true].indexOf(true, "-1")');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-5-16.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-5-16.js
new file mode 100644
index 0000000000..b10cf23ae8
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-5-16.js
@@ -0,0 +1,16 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf - value of 'fromIndex' is a string
+    containing Infinity
+---*/
+
+var arr = [];
+arr[Math.pow(2, 32) - 2] = true; //length is the max value of Uint type
+
+assert.sameValue(arr.indexOf(true, "Infinity"), -1, 'arr.indexOf(true, "Infinity")');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-5-17.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-5-17.js
new file mode 100644
index 0000000000..6229e6f0c5
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-5-17.js
@@ -0,0 +1,13 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf - value of 'fromIndex' is a string
+    containing -Infinity
+---*/
+
+assert.sameValue([true].indexOf(true, "-Infinity"), 0, '[true].indexOf(true, "-Infinity")');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-5-18.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-5-18.js
new file mode 100644
index 0000000000..4d02f2b9f2
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-5-18.js
@@ -0,0 +1,16 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf - value of 'fromIndex' is a string
+    containing an exponential number
+---*/
+
+var targetObj = {};
+
+assert.sameValue([0, 1, targetObj, 3, 4].indexOf(targetObj, "3E0"), -1, '[0, 1, targetObj, 3, 4].indexOf(targetObj, "3E0")');
+assert.sameValue([0, 1, 2, targetObj, 4].indexOf(targetObj, "3E0"), 3, '[0, 1, 2, targetObj, 4].indexOf(targetObj, "3E0")');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-5-19.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-5-19.js
new file mode 100644
index 0000000000..34bbfb71ea
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-5-19.js
@@ -0,0 +1,16 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf - value of 'fromIndex' is a string
+    containing a hex number
+---*/
+
+var targetObj = {};
+
+assert.sameValue([0, 1, targetObj, 3, 4].indexOf(targetObj, "0x0003"), -1, '[0, 1, targetObj, 3, 4].indexOf(targetObj, "0x0003")');
+assert.sameValue([0, 1, 2, targetObj, 4].indexOf(targetObj, "0x0003"), 3, '[0, 1, 2, targetObj, 4].indexOf(targetObj, "0x0003")');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-5-2.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-5-2.js
new file mode 100644
index 0000000000..13307e700a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-5-2.js
@@ -0,0 +1,15 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: Array.prototype.indexOf when fromIndex is floating point number
+---*/
+
+var a = new Array(1, 2, 3);
+
+assert.sameValue(a.indexOf(3, 0.49), 2, '0.49 resolves to 0');
+assert.sameValue(a.indexOf(1, 0.51), 0, '0.51 resolves to 0');
+assert.sameValue(a.indexOf(1, 1.51), -1, '1.51 resolves to 1');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-5-20.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-5-20.js
new file mode 100644
index 0000000000..c8665ea766
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-5-20.js
@@ -0,0 +1,16 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf - value of 'fromIndex' which is a string
+    containing a number with leading zeros
+---*/
+
+var targetObj = {};
+
+assert.sameValue([0, 1, targetObj, 3, 4].indexOf(targetObj, "0003.10"), -1, '[0, 1, targetObj, 3, 4].indexOf(targetObj, "0003.10")');
+assert.sameValue([0, 1, 2, targetObj, 4].indexOf(targetObj, "0003.10"), 3, '[0, 1, 2, targetObj, 4].indexOf(targetObj, "0003.10")');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-5-21.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-5-21.js
new file mode 100644
index 0000000000..363684cda1
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-5-21.js
@@ -0,0 +1,24 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf - value of 'fromIndex' is an Object, which
+    has an own toString method
+---*/
+
+// objects inherit the default valueOf() method from Object
+// that simply returns itself. Since the default valueOf() method
+// does not return a primitive value, ES next tries to convert the object
+// to a number by calling its toString() method and converting the
+// resulting string to a number.
+var fromIndex = {
+  toString: function() {
+    return '1';
+  }
+};
+
+assert.sameValue([0, true].indexOf(true, fromIndex), 1, '[0, true].indexOf(true, fromIndex)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-5-22.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-5-22.js
new file mode 100644
index 0000000000..0b0f1d4357
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-5-22.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf - value of 'fromIndex' is an Object, which
+    has an own valueOf method
+---*/
+
+var fromIndex = {
+  valueOf: function() {
+    return 1;
+  }
+};
+
+
+assert.sameValue([0, true].indexOf(true, fromIndex), 1, '[0, true].indexOf(true, fromIndex)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-5-23.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-5-23.js
new file mode 100644
index 0000000000..edc75cf561
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-5-23.js
@@ -0,0 +1,31 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf - value of 'fromIndex' is an object that
+    has an own valueOf method that returns an object and toString
+    method that returns a string
+---*/
+
+var toStringAccessed = false;
+var valueOfAccessed = false;
+
+var fromIndex = {
+  toString: function() {
+    toStringAccessed = true;
+    return '1';
+  },
+
+  valueOf: function() {
+    valueOfAccessed = true;
+    return {};
+  }
+};
+
+assert.sameValue([0, true].indexOf(true, fromIndex), 1, '[0, true].indexOf(true, fromIndex)');
+assert(toStringAccessed, 'toStringAccessed !== true');
+assert(valueOfAccessed, 'valueOfAccessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-5-24.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-5-24.js
new file mode 100644
index 0000000000..774b93121c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-5-24.js
@@ -0,0 +1,33 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf throws TypeError exception when value of
+    'fromIndex' is an object with toString and valueOf methods that
+    don�t return primitive values
+---*/
+
+var toStringAccessed = false;
+var valueOfAccessed = false;
+var fromIndex = {
+  toString: function() {
+    toStringAccessed = true;
+    return {};
+  },
+
+  valueOf: function() {
+    valueOfAccessed = true;
+    return {};
+  }
+};
+
+assert.throws(TypeError, function() {
+  [0, true].indexOf(true, fromIndex);
+});
+
+assert(toStringAccessed, 'toStringAccessed');
+assert(valueOfAccessed, 'valueOfAccessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-5-25.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-5-25.js
new file mode 100644
index 0000000000..15a03f87d7
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-5-25.js
@@ -0,0 +1,35 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf uses inherited valueOf method when value
+    of 'fromIndex' is an object with an own toString and inherited
+    valueOf methods
+---*/
+
+var toStringAccessed = false;
+var valueOfAccessed = false;
+
+var proto = {
+  valueOf: function() {
+    valueOfAccessed = true;
+    return 1;
+  }
+};
+
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+child.toString = function() {
+  toStringAccessed = true;
+  return 2;
+};
+
+assert.sameValue([0, true].indexOf(true, child), 1, '[0, true].indexOf(true, child)');
+assert(valueOfAccessed, 'valueOfAccessed !== true');
+assert.sameValue(toStringAccessed, false, 'toStringAccessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-5-26.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-5-26.js
new file mode 100644
index 0000000000..7ae507d893
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-5-26.js
@@ -0,0 +1,39 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf - side effects produced by step 2 are
+    visible when an exception occurs
+---*/
+
+var stepTwoOccurs = false;
+var stepFiveOccurs = false;
+
+var obj = {};
+
+Object.defineProperty(obj, "length", {
+  get: function() {
+    stepTwoOccurs = true;
+    if (stepFiveOccurs) {
+      throw new Error("Step 5 occurred out of order");
+    }
+    return 20;
+  },
+  configurable: true
+});
+
+var fromIndex = {
+  valueOf: function() {
+    stepFiveOccurs = true;
+    return 0;
+  }
+};
+
+Array.prototype.indexOf.call(obj, undefined, fromIndex);
+
+assert(stepTwoOccurs, 'stepTwoOccurs !== true');
+assert(stepFiveOccurs, 'stepFiveOccurs !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-5-27.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-5-27.js
new file mode 100644
index 0000000000..922dea82be
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-5-27.js
@@ -0,0 +1,43 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf - side effects produced by step 3 are
+    visible when an exception occurs
+---*/
+
+var stepThreeOccurs = false;
+var stepFiveOccurs = false;
+
+var obj = {};
+
+Object.defineProperty(obj, "length", {
+  get: function() {
+    return {
+      valueOf: function() {
+        stepThreeOccurs = true;
+        if (stepFiveOccurs) {
+          throw new Error("Step 5 occurred out of order");
+        }
+        return 20;
+      }
+    };
+  },
+  configurable: true
+});
+
+var fromIndex = {
+  valueOf: function() {
+    stepFiveOccurs = true;
+    return 0;
+  }
+};
+
+Array.prototype.indexOf.call(obj, undefined, fromIndex);
+
+assert(stepThreeOccurs, 'stepThreeOccurs !== true');
+assert(stepFiveOccurs, 'stepFiveOccurs !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-5-28.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-5-28.js
new file mode 100644
index 0000000000..6a52b36f57
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-5-28.js
@@ -0,0 +1,23 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf - side effects produced by step 1 are
+    visible when an exception occurs
+---*/
+
+var stepFiveOccurs = false;
+var fromIndex = {
+  valueOf: function() {
+    stepFiveOccurs = true;
+    return 0;
+  }
+};
+assert.throws(TypeError, function() {
+  Array.prototype.indexOf.call(undefined, undefined, fromIndex);
+});
+assert.sameValue(stepFiveOccurs, false, 'stepFiveOccurs');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-5-29.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-5-29.js
new file mode 100644
index 0000000000..9837ce9833
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-5-29.js
@@ -0,0 +1,32 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf - side effects produced by step 2 are
+    visible when an exception occurs
+---*/
+
+var stepFiveOccurs = false;
+
+var obj = {};
+Object.defineProperty(obj, "length", {
+  get: function() {
+    throw new RangeError();
+  },
+  configurable: true
+});
+
+var fromIndex = {
+  valueOf: function() {
+    stepFiveOccurs = true;
+    return 0;
+  }
+};
+assert.throws(RangeError, function() {
+  Array.prototype.indexOf.call(obj, undefined, fromIndex);
+});
+assert.sameValue(stepFiveOccurs, false, 'stepFiveOccurs');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-5-3.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-5-3.js
new file mode 100644
index 0000000000..809d6b28b9
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-5-3.js
@@ -0,0 +1,14 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: Array.prototype.indexOf when fromIndex is boolean
+---*/
+
+var a = [1, 2, 3];
+
+assert.sameValue(a.indexOf(1, true), -1, 'true resolves to 1');
+assert.sameValue(a.indexOf(1, false), 0, 'false resolves to 0');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-5-30.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-5-30.js
new file mode 100644
index 0000000000..c6a0f57084
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-5-30.js
@@ -0,0 +1,36 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf - side effects produced by step 3 are
+    visible when an exception occurs
+---*/
+
+var stepFiveOccurs = false;
+
+var obj = {};
+Object.defineProperty(obj, "length", {
+  get: function() {
+    return {
+      valueOf: function() {
+        throw new TypeError();
+      }
+    };
+  },
+  configurable: true
+});
+
+var fromIndex = {
+  valueOf: function() {
+    stepFiveOccurs = true;
+    return 0;
+  }
+};
+assert.throws(TypeError, function() {
+  Array.prototype.indexOf.call(obj, undefined, fromIndex);
+});
+assert.sameValue(stepFiveOccurs, false, 'stepFiveOccurs');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-5-31.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-5-31.js
new file mode 100644
index 0000000000..fa49ce4b90
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-5-31.js
@@ -0,0 +1,16 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf - 'fromIndex' is a positive non-integer,
+    verify truncation occurs in the proper direction
+---*/
+
+var targetObj = {};
+
+assert.sameValue([0, targetObj, 2].indexOf(targetObj, 2.5), -1, '[0, targetObj, 2].indexOf(targetObj, 2.5)');
+assert.sameValue([0, 1, targetObj].indexOf(targetObj, 2.5), 2, '[0, 1, targetObj].indexOf(targetObj, 2.5)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-5-32.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-5-32.js
new file mode 100644
index 0000000000..60d3725ac0
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-5-32.js
@@ -0,0 +1,16 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf - 'fromIndex' is a negative non-integer,
+    verify truncation occurs in the proper direction
+---*/
+
+var targetObj = {};
+
+assert.sameValue([0, targetObj, 2].indexOf(targetObj, -1.5), -1, '[0, targetObj, 2].indexOf(targetObj, -1.5)');
+assert.sameValue([0, 1, targetObj].indexOf(targetObj, -1.5), 2, '[0, 1, targetObj].indexOf(targetObj, -1.5)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-5-33.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-5-33.js
new file mode 100644
index 0000000000..48b686415c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-5-33.js
@@ -0,0 +1,17 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf match on the first element, a middle
+    element and the last element when 'fromIndex' is passed
+---*/
+
+assert.sameValue([0, 1, 2, 3, 4].indexOf(0, 0), 0, '[0, 1, 2, 3, 4].indexOf(0, 0)');
+assert.sameValue([0, 1, 2, 3, 4].indexOf(2, 1), 2, '[0, 1, 2, 3, 4].indexOf(2, 1)');
+assert.sameValue([0, 1, 2, 3, 4].indexOf(2, 2), 2, '[0, 1, 2, 3, 4].indexOf(2, 2)');
+assert.sameValue([0, 1, 2, 3, 4].indexOf(4, 2), 4, '[0, 1, 2, 3, 4].indexOf(4, 2)');
+assert.sameValue([0, 1, 2, 3, 4].indexOf(4, 4), 4, '[0, 1, 2, 3, 4].indexOf(4, 4)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-5-4.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-5-4.js
new file mode 100644
index 0000000000..70edf91c2a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-5-4.js
@@ -0,0 +1,14 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: Array.prototype.indexOf returns 0 if fromIndex is 'undefined'
+---*/
+
+var a = [1, 2, 3];
+
+// undefined resolves to 0
+assert.sameValue(a.indexOf(1, undefined), 0, 'a.indexOf(1,undefined)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-5-5.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-5-5.js
new file mode 100644
index 0000000000..f601f1675d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-5-5.js
@@ -0,0 +1,14 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: Array.prototype.indexOf returns 0 if fromIndex is null
+---*/
+
+var a = [1, 2, 3];
+
+// null resolves to 0
+assert.sameValue(a.indexOf(1, null), 0, 'a.indexOf(1,null)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-5-6.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-5-6.js
new file mode 100644
index 0000000000..274f417227
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-5-6.js
@@ -0,0 +1,16 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: Array.prototype.indexOf - 'fromIndex' isn't passed
+---*/
+
+var arr = [0, 1, 2, 3, 4];
+//'fromIndex' will be set as 0 if not passed by default
+
+assert.sameValue(arr.indexOf(0), arr.indexOf(0, 0), 'arr.indexOf(0)');
+assert.sameValue(arr.indexOf(2), arr.indexOf(2, 0), 'arr.indexOf(2)');
+assert.sameValue(arr.indexOf(4), arr.indexOf(4, 0), 'arr.indexOf(4)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-5-7.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-5-7.js
new file mode 100644
index 0000000000..2142402238
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-5-7.js
@@ -0,0 +1,13 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf - value of 'fromIndex' is a number (value
+    is 0)
+---*/
+
+assert.sameValue([true].indexOf(true, 0), 0, '[true].indexOf(true, 0)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-5-8.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-5-8.js
new file mode 100644
index 0000000000..e694a870a2
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-5-8.js
@@ -0,0 +1,13 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf - value of 'fromIndex' is a number (value
+    is +0)
+---*/
+
+assert.sameValue([true].indexOf(true, +0), 0, '[true].indexOf(true, +0)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-5-9.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-5-9.js
new file mode 100644
index 0000000000..c484140e30
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-5-9.js
@@ -0,0 +1,13 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf - value of 'fromIndex' is a number (value
+    is -0)
+---*/
+
+assert.sameValue([true].indexOf(true, -0), 0, '[true].indexOf(true, -0)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-6-1.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-6-1.js
new file mode 100644
index 0000000000..79aa1bd36d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-6-1.js
@@ -0,0 +1,17 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf returns -1 if fromIndex is greater than
+    Array length
+---*/
+
+var a = [1, 2, 3];
+
+assert.sameValue(a.indexOf(1, 5), -1, 'a.indexOf(1,5)');
+assert.sameValue(a.indexOf(1, 3), -1, 'a.indexOf(1,3)');
+assert.sameValue([].indexOf(1, 0), -1, '[ ].indexOf(1,0)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-7-1.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-7-1.js
new file mode 100644
index 0000000000..c03bf04af6
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-7-1.js
@@ -0,0 +1,13 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf returns -1 when 'fromIndex' is length of
+    array - 1
+---*/
+
+assert.sameValue([1, 2, 3].indexOf(1, 2), -1, '[1, 2, 3].indexOf(1, 2)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-7-2.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-7-2.js
new file mode 100644
index 0000000000..9a5e0fa89f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-7-2.js
@@ -0,0 +1,13 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf returns correct index when 'fromIndex' is
+    length of array - 1
+---*/
+
+assert.sameValue([1, 2, 3].indexOf(3, 2), 2, '[1, 2, 3].indexOf(3, 2)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-7-3.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-7-3.js
new file mode 100644
index 0000000000..f3a4585ca8
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-7-3.js
@@ -0,0 +1,13 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf returns -1 when 'fromIndex' and 'length'
+    are both 0
+---*/
+
+assert.sameValue([].indexOf(1, 0), -1, '[].indexOf(1, 0)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-7-4.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-7-4.js
new file mode 100644
index 0000000000..175ae99274
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-7-4.js
@@ -0,0 +1,11 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: Array.prototype.indexOf returns -1 when 'fromIndex' is 1
+---*/
+
+assert.sameValue([1, 2, 3].indexOf(1, 1), -1, '[1, 2, 3].indexOf(1, 1)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-7-5.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-7-5.js
new file mode 100644
index 0000000000..8c7def228d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-7-5.js
@@ -0,0 +1,11 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: Array.prototype.indexOf returns correct index when 'fromIndex' is 1
+---*/
+
+assert.sameValue([1, 2, 3].indexOf(2, 1), 1, '[1, 2, 3].indexOf(2, 1)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-8-1.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-8-1.js
new file mode 100644
index 0000000000..25c5b8043c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-8-1.js
@@ -0,0 +1,17 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: Array.prototype.indexOf with negative fromIndex
+---*/
+
+var a = new Array(1, 2, 3);
+
+
+assert.sameValue(a.indexOf(2, -1), -1, 'a.indexOf(2,-1)');
+assert.sameValue(a.indexOf(2, -2), 1, 'a.indexOf(2,-2)');
+assert.sameValue(a.indexOf(1, -3), 0, 'a.indexOf(1,-3)');
+assert.sameValue(a.indexOf(1, -5.3), 0, 'a.indexOf(1,-5.3)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-8-2.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-8-2.js
new file mode 100644
index 0000000000..ec035415e2
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-8-2.js
@@ -0,0 +1,13 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf returns correct index when 'fromIndex' is
+    -1
+---*/
+
+assert.sameValue([1, 2, 3, 4].indexOf(4, -1), 3, '[1, 2, 3, 4].indexOf(4, -1)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-8-3.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-8-3.js
new file mode 100644
index 0000000000..a752d7ee45
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-8-3.js
@@ -0,0 +1,13 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf returns -1 when abs('fromIndex') is length
+    of array - 1
+---*/
+
+assert.sameValue([1, 2, 3, 4].indexOf(1, -3), -1, '[1, 2, 3, 4].indexOf(1, -3)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-8-4.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-8-4.js
new file mode 100644
index 0000000000..c0fe6e7a36
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-8-4.js
@@ -0,0 +1,13 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf returns -1 when abs('fromIndex') is length
+    of array
+---*/
+
+assert.sameValue([1, 2, 3, 4].indexOf(0, -4), -1, '[1, 2, 3, 4].indexOf(0, -4)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-1.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-1.js
new file mode 100644
index 0000000000..a5ad6f9702
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-1.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: Array.prototype.indexOf must return correct index (boolean)
+---*/
+
+var obj = {
+  toString: function() {
+    return true
+  }
+};
+var _false = false;
+var a = [obj, "true", undefined, 0, _false, null, 1, "str", 0, 1, true, false, true, false];
+
+assert.sameValue(a.indexOf(true), 10, 'a[10]=true');
+assert.sameValue(a.indexOf(false), 4, 'a[4] =_false');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-10.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-10.js
new file mode 100644
index 0000000000..cfe1a6290b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-10.js
@@ -0,0 +1,21 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    note that prior to the finally ES5 draft SameValue was used for comparisions
+    and hence NaNs could be found using indexOf *
+esid: sec-array.prototype.indexof
+description: Array.prototype.indexOf must return correct index (NaN)
+---*/
+
+var _NaN = NaN;
+var a = new Array("NaN", undefined, 0, false, null, {
+  toString: function() {
+    return NaN
+  }
+}, "false", _NaN, NaN);
+
+assert.sameValue(a.indexOf(NaN), -1, 'NaN is equal to nothing, including itself.');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-11.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-11.js
new file mode 100644
index 0000000000..65cab9d813
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-11.js
@@ -0,0 +1,23 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf - the length of iteration isn't changed by
+    adding elements to the array during iteration
+---*/
+
+var arr = [20];
+
+Object.defineProperty(arr, "0", {
+  get: function() {
+    arr[1] = 1;
+    return 0;
+  },
+  configurable: true
+});
+
+assert.sameValue(arr.indexOf(1), -1, 'arr.indexOf(1)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-2.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-2.js
new file mode 100644
index 0000000000..5250eb36d4
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-2.js
@@ -0,0 +1,23 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: Array.prototype.indexOf must return correct index (Number)
+---*/
+
+var obj = {
+  toString: function() {
+    return 0
+  }
+};
+var one = 1;
+var _float = -(4 / 3);
+var a = new Array(false, undefined, null, "0", obj, -1.3333333333333, "str", -0, true, +0, one, 1, 0, false, _float, -(4 / 3));
+
+assert.sameValue(a.indexOf(-(4 / 3)), 14, 'a[14]=_float===-(4/3)');
+assert.sameValue(a.indexOf(0), 7, 'a[7] = +0, 0===+0');
+assert.sameValue(a.indexOf(-0), 7, 'a[7] = +0, -0===+0');
+assert.sameValue(a.indexOf(1), 10, 'a[10] =one=== 1');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-3.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-3.js
new file mode 100644
index 0000000000..ba35d284e2
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-3.js
@@ -0,0 +1,19 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: Array.prototype.indexOf must return correct index(string)
+---*/
+
+var obj = {
+  toString: function() {
+    return "false"
+  }
+};
+var szFalse = "false";
+var a = new Array("false1", undefined, 0, false, null, 1, obj, 0, szFalse, "false");
+
+assert.sameValue(a.indexOf("false"), 8, 'a[8]=szFalse');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-4.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-4.js
new file mode 100644
index 0000000000..daef7b2fe5
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-4.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: Array.prototype.indexOf must return correct index(undefined)
+---*/
+
+var obj = {
+  toString: function() {
+    return undefined;
+  }
+};
+var _undefined1 = undefined;
+var _undefined2;
+var a = new Array(true, 0, false, null, 1, "undefined", obj, 1, _undefined2, _undefined1, undefined);
+
+assert.sameValue(a.indexOf(undefined), 8, 'a[8]=_undefined2');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-5.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-5.js
new file mode 100644
index 0000000000..58a61bda0d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-5.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: Array.prototype.indexOf must return correct index (Object)
+---*/
+
+var obj1 = {
+  toString: function() {
+    return "false"
+  }
+};
+var obj2 = {
+  toString: function() {
+    return "false"
+  }
+};
+var obj3 = obj1;
+var a = new Array(false, undefined, 0, false, null, {
+  toString: function() {
+    return "false"
+  }
+}, "false", obj2, obj1, obj3);
+
+assert.sameValue(a.indexOf(obj3), 8, 'a[8] = obj1');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-6.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-6.js
new file mode 100644
index 0000000000..45f95bb47b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-6.js
@@ -0,0 +1,19 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: Array.prototype.indexOf must return correct index(null)
+---*/
+
+var obj = {
+  toString: function() {
+    return null
+  }
+};
+var _null = null;
+var a = new Array(true, undefined, 0, false, _null, 1, "str", 0, 1, obj, true, false, null);
+
+assert.sameValue(a.indexOf(null), 4, 'a[4]=_null');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-7.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-7.js
new file mode 100644
index 0000000000..a686df3320
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-7.js
@@ -0,0 +1,15 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: Array.prototype.indexOf must return correct index (self reference)
+---*/
+
+var a = new Array(0, 1, 2, 3);
+a[2] = a;
+
+assert.sameValue(a.indexOf(a), 2, 'a.indexOf(a)');
+assert.sameValue(a.indexOf(3), 3, 'a.indexOf(3)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-8.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-8.js
new file mode 100644
index 0000000000..14a34fd1e5
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-8.js
@@ -0,0 +1,15 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: Array.prototype.indexOf must return correct index (Array)
+---*/
+
+var b = new Array("0,1");
+var a = new Array(0, b, "0,1", 3);
+
+assert.sameValue(a.indexOf(b.toString()), 2, 'a.indexOf(b.toString())');
+assert.sameValue(a.indexOf("0,1"), 2, 'a.indexOf("0,1")');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-9.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-9.js
new file mode 100644
index 0000000000..60c04f3105
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-9.js
@@ -0,0 +1,22 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: Array.prototype.indexOf must return correct index (Sparse Array)
+---*/
+
+var a = new Array(0, 1);
+a[4294967294] = 2; // 2^32-2 - is max array element
+a[4294967295] = 3; // 2^32-1 added as non-array element property
+a[4294967296] = 4; // 2^32   added as non-array element property
+a[4294967297] = 5; // 2^32+1 added as non-array element property
+
+// start searching near the end so in case implementation actually tries to test all missing elements!!
+
+assert.sameValue(a.indexOf(2, 4294967290), 4294967294, 'a.indexOf(2,4294967290 )');
+assert.sameValue(a.indexOf(3, 4294967290), -1, 'a.indexOf(3,4294967290)');
+assert.sameValue(a.indexOf(4, 4294967290), -1, 'a.indexOf(4,4294967290)');
+assert.sameValue(a.indexOf(5, 4294967290), -1, 'a.indexOf(5,4294967290)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-a-1.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-a-1.js
new file mode 100644
index 0000000000..eeb1da1da2
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-a-1.js
@@ -0,0 +1,23 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf - added properties in step 2 are visible
+    here
+---*/
+
+var arr = {};
+
+Object.defineProperty(arr, "length", {
+  get: function() {
+    arr[2] = "length";
+    return 3;
+  },
+  configurable: true
+});
+
+assert.sameValue(Array.prototype.indexOf.call(arr, "length"), 2, 'Array.prototype.indexOf.call(arr, "length")');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-a-10.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-a-10.js
new file mode 100644
index 0000000000..ddd98f4e79
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-a-10.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf - properties can be added to prototype
+    after current position are visited on an Array
+---*/
+
+var arr = [0, , 2];
+
+Object.defineProperty(arr, "0", {
+  get: function() {
+    Object.defineProperty(Array.prototype, "1", {
+      get: function() {
+        return 6.99;
+      },
+      configurable: true
+    });
+    return 0;
+  },
+  configurable: true
+});
+
+assert.sameValue(arr.indexOf(6.99), 1, 'arr.indexOf(6.99)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-a-11.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-a-11.js
new file mode 100644
index 0000000000..a95e31b11c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-a-11.js
@@ -0,0 +1,32 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf - deleting own property causes index
+    property not to be visited on an Array-like object
+---*/
+
+var arr = {
+  length: 2
+};
+
+Object.defineProperty(arr, "1", {
+  get: function() {
+    return 6.99;
+  },
+  configurable: true
+});
+
+Object.defineProperty(arr, "0", {
+  get: function() {
+    delete arr[1];
+    return 0;
+  },
+  configurable: true
+});
+
+assert.sameValue(Array.prototype.indexOf.call(arr, 6.99), -1, 'Array.prototype.indexOf.call(arr, 6.99)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-a-12.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-a-12.js
new file mode 100644
index 0000000000..4c503906c5
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-a-12.js
@@ -0,0 +1,30 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf - deleting own property causes index
+    property not to be visited on an Array
+---*/
+
+var arr = [1, 2];
+
+Object.defineProperty(arr, "1", {
+  get: function() {
+    return "6.99";
+  },
+  configurable: true
+});
+
+Object.defineProperty(arr, "0", {
+  get: function() {
+    delete arr[1];
+    return 0;
+  },
+  configurable: true
+});
+
+assert.sameValue(arr.indexOf("6.99"), -1, 'arr.indexOf("6.99")');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-a-13.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-a-13.js
new file mode 100644
index 0000000000..ddd10125cb
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-a-13.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf - deleting property of prototype causes
+    prototype index property not to be visited on an Array-like Object
+---*/
+
+var arr = {
+  2: 2,
+  length: 20
+};
+
+Object.defineProperty(arr, "0", {
+  get: function() {
+    delete Object.prototype[1];
+    return 0;
+  },
+  configurable: true
+});
+
+Object.prototype[1] = 1;
+
+assert.sameValue(Array.prototype.indexOf.call(arr, 1), -1, 'Array.prototype.indexOf.call(arr, 1)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-a-14.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-a-14.js
new file mode 100644
index 0000000000..1edbff8d55
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-a-14.js
@@ -0,0 +1,25 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf - deleting property of prototype causes
+    prototype index property not to be visited on an Array
+---*/
+
+var arr = [0, , 2];
+
+Object.defineProperty(arr, "0", {
+  get: function() {
+    delete Array.prototype[1];
+    return 0;
+  },
+  configurable: true
+});
+
+Array.prototype[1] = 1;
+
+assert.sameValue(arr.indexOf(1), -1, 'arr.indexOf(1)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-a-15.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-a-15.js
new file mode 100644
index 0000000000..34d437b0a5
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-a-15.js
@@ -0,0 +1,31 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf - deleting own property with prototype
+    property causes prototype index property to be visited on an
+    Array-like object
+---*/
+
+var arr = {
+  0: 0,
+  1: 111,
+  2: 2,
+  length: 10
+};
+
+Object.defineProperty(arr, "0", {
+  get: function() {
+    delete arr[1];
+    return 0;
+  },
+  configurable: true
+});
+
+Object.prototype[1] = 1;
+
+assert.sameValue(Array.prototype.indexOf.call(arr, 1), 1, 'Array.prototype.indexOf.call(arr, 1)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-a-16.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-a-16.js
new file mode 100644
index 0000000000..90f84f8c48
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-a-16.js
@@ -0,0 +1,25 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf - deleting own property with prototype
+    property causes prototype index property to be visited on an Array
+---*/
+
+var arr = [0, 111, 2];
+
+Object.defineProperty(arr, "0", {
+  get: function() {
+    delete arr[1];
+    return 0;
+  },
+  configurable: true
+});
+
+Array.prototype[1] = 1;
+
+assert.sameValue(arr.indexOf(1), 1, 'arr.indexOf(1)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-a-17.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-a-17.js
new file mode 100644
index 0000000000..07cfc468c8
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-a-17.js
@@ -0,0 +1,23 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf - decreasing length of array causes index
+    property not to be visited
+---*/
+
+var arr = [0, 1, 2, "last"];
+
+Object.defineProperty(arr, "0", {
+  get: function() {
+    arr.length = 3;
+    return 0;
+  },
+  configurable: true
+});
+
+assert.sameValue(arr.indexOf("last"), -1, 'arr.indexOf("last")');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-a-18.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-a-18.js
new file mode 100644
index 0000000000..f258c5b498
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-a-18.js
@@ -0,0 +1,30 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf - decreasing length of array with
+    prototype property causes prototype index property to be visited
+---*/
+
+var arr = [0, 1, 2];
+
+Object.defineProperty(Array.prototype, "2", {
+  get: function() {
+    return "prototype";
+  },
+  configurable: true
+});
+
+Object.defineProperty(arr, "1", {
+  get: function() {
+    arr.length = 2;
+    return 1;
+  },
+  configurable: true
+});
+
+assert.sameValue(arr.indexOf("prototype"), 2, 'arr.indexOf("prototype")');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-a-19.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-a-19.js
new file mode 100644
index 0000000000..4bf02ee442
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-a-19.js
@@ -0,0 +1,32 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf - decreasing length of array does not
+    delete non-configurable properties
+flags: [noStrict]
+---*/
+
+var arr = [0, 1, 2];
+
+Object.defineProperty(arr, "2", {
+  get: function() {
+    return "unconfigurable";
+  },
+  configurable: false
+});
+
+Object.defineProperty(arr, "1", {
+  get: function() {
+    arr.length = 2;
+    return 1;
+  },
+  configurable: true
+});
+
+
+assert.sameValue(arr.indexOf("unconfigurable"), 2, 'arr.indexOf("unconfigurable")');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-a-2.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-a-2.js
new file mode 100644
index 0000000000..50387482e4
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-a-2.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf - added properties in step 5 are visible
+    here on an Array-like object
+---*/
+
+var arr = {
+  length: 30
+};
+var targetObj = function() {};
+
+var fromIndex = {
+  valueOf: function() {
+    arr[4] = targetObj;
+    return 3;
+  }
+};
+
+
+assert.sameValue(Array.prototype.indexOf.call(arr, targetObj, fromIndex), 4, 'Array.prototype.indexOf.call(arr, targetObj, fromIndex)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-a-3.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-a-3.js
new file mode 100644
index 0000000000..a030847c3f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-a-3.js
@@ -0,0 +1,24 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf - added properties in step 5 are visible
+    here on an Array
+---*/
+
+var arr = [];
+arr.length = 30;
+var targetObj = function() {};
+
+var fromIndex = {
+  valueOf: function() {
+    arr[4] = targetObj;
+    return 3;
+  }
+};
+
+assert.sameValue(arr.indexOf(targetObj, fromIndex), 4, 'arr.indexOf(targetObj, fromIndex)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-a-4.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-a-4.js
new file mode 100644
index 0000000000..ad0b3b53e7
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-a-4.js
@@ -0,0 +1,25 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf - deleted properties in step 2 are visible
+    here
+---*/
+
+var arr = {
+  2: 6.99
+};
+
+Object.defineProperty(arr, "length", {
+  get: function() {
+    delete arr[2];
+    return 3;
+  },
+  configurable: true
+});
+
+assert.sameValue(Array.prototype.indexOf.call(arr, 6.99), -1, 'Array.prototype.indexOf.call(arr, 6.99)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-a-5.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-a-5.js
new file mode 100644
index 0000000000..3bfd0240fd
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-a-5.js
@@ -0,0 +1,25 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf - deleted properties in step 5 are visible
+    here on an Array-like object
+---*/
+
+var arr = {
+  10: false,
+  length: 30
+};
+
+var fromIndex = {
+  valueOf: function() {
+    delete arr[10];
+    return 3;
+  }
+};
+
+assert.sameValue(Array.prototype.indexOf.call(arr, false, fromIndex), -1, 'Array.prototype.indexOf.call(arr, false, fromIndex)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-a-6.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-a-6.js
new file mode 100644
index 0000000000..64b13aec12
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-a-6.js
@@ -0,0 +1,24 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf - deleted properties in step 5 are visible
+    here on an Array
+---*/
+
+var arr = [];
+arr[10] = "10";
+arr.length = 20;
+
+var fromIndex = {
+  valueOf: function() {
+    delete arr[10];
+    return 3;
+  }
+};
+
+assert.sameValue(arr.indexOf("10", fromIndex), -1, 'arr.indexOf("10", fromIndex)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-a-7.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-a-7.js
new file mode 100644
index 0000000000..5f6a0306d9
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-a-7.js
@@ -0,0 +1,30 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf - properties added into own object after
+    current position are visited on an Array-like object
+---*/
+
+var arr = {
+  length: 2
+};
+
+Object.defineProperty(arr, "0", {
+  get: function() {
+    Object.defineProperty(arr, "1", {
+      get: function() {
+        return 1;
+      },
+      configurable: true
+    });
+    return 0;
+  },
+  configurable: true
+});
+
+assert.sameValue(Array.prototype.indexOf.call(arr, 1), 1, 'Array.prototype.indexOf.call(arr, 1)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-a-8.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-a-8.js
new file mode 100644
index 0000000000..fbc2ae6059
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-a-8.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf - properties added into own object after
+    current position are visited on an Array
+---*/
+
+var arr = [0, , 2];
+
+Object.defineProperty(arr, "0", {
+  get: function() {
+    Object.defineProperty(arr, "1", {
+      get: function() {
+        return 1;
+      },
+      configurable: true
+    });
+    return 0;
+  },
+  configurable: true
+});
+
+assert.sameValue(arr.indexOf(1), 1, 'arr.indexOf(1)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-a-9.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-a-9.js
new file mode 100644
index 0000000000..15ced96952
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-a-9.js
@@ -0,0 +1,30 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf - properties can be added to prototype
+    after current position are visited on an Array-like object
+---*/
+
+var arr = {
+  length: 2
+};
+
+Object.defineProperty(arr, "0", {
+  get: function() {
+    Object.defineProperty(Object.prototype, "1", {
+      get: function() {
+        return 6.99;
+      },
+      configurable: true
+    });
+    return 0;
+  },
+  configurable: true
+});
+
+assert.sameValue(Array.prototype.indexOf.call(arr, 6.99), 1, 'Array.prototype.indexOf.call(arr, 6.99)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-b-1.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-b-1.js
new file mode 100644
index 0000000000..0ca9e77463
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-b-1.js
@@ -0,0 +1,11 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: Array.prototype.indexOf - non-existent property wouldn't be called
+---*/
+
+assert.sameValue([0, , 2].indexOf(undefined), -1, '[0, , 2].indexOf(undefined)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-b-i-1.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-b-i-1.js
new file mode 100644
index 0000000000..1307ae7afa
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-b-i-1.js
@@ -0,0 +1,22 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf - element to be retrieved is own data
+    property on an Array-like object
+---*/
+
+var obj = {
+  0: 0,
+  1: 1,
+  2: 2,
+  length: 3
+};
+
+assert.sameValue(Array.prototype.indexOf.call(obj, 0), 0, 'Array.prototype.indexOf.call(obj, 0)');
+assert.sameValue(Array.prototype.indexOf.call(obj, 1), 1, 'Array.prototype.indexOf.call(obj, 1)');
+assert.sameValue(Array.prototype.indexOf.call(obj, 2), 2, 'Array.prototype.indexOf.call(obj, 2)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-b-i-10.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-b-i-10.js
new file mode 100644
index 0000000000..96ea7e5005
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-b-i-10.js
@@ -0,0 +1,39 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf - element to be retrieved is own accessor
+    property on an Array-like object
+---*/
+
+var obj = {
+  length: 3
+};
+Object.defineProperty(obj, "0", {
+  get: function() {
+    return 0;
+  },
+  configurable: true
+});
+
+Object.defineProperty(obj, "1", {
+  get: function() {
+    return 1;
+  },
+  configurable: true
+});
+
+Object.defineProperty(obj, "2", {
+  get: function() {
+    return 2;
+  },
+  configurable: true
+});
+
+assert.sameValue(Array.prototype.indexOf.call(obj, 0), 0, 'Array.prototype.indexOf.call(obj, 0)');
+assert.sameValue(Array.prototype.indexOf.call(obj, 1), 1, 'Array.prototype.indexOf.call(obj, 1)');
+assert.sameValue(Array.prototype.indexOf.call(obj, 2), 2, 'Array.prototype.indexOf.call(obj, 2)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-b-i-11.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-b-i-11.js
new file mode 100644
index 0000000000..0343a6c327
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-b-i-11.js
@@ -0,0 +1,23 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf - element to be retrieved is own accessor
+    property that overrides an inherited data property on an Array
+---*/
+
+var arr = [];
+
+Array.prototype[0] = false;
+Object.defineProperty(arr, "0", {
+  get: function() {
+    return true;
+  },
+  configurable: true
+});
+
+assert.sameValue(arr.indexOf(true), 0, 'arr.indexOf(true)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-b-i-12.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-b-i-12.js
new file mode 100644
index 0000000000..73d18383d0
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-b-i-12.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf - element to be retrieved is own accessor
+    property that overrides an inherited data property on an
+    Array-like object
+---*/
+
+var obj = {
+  length: 1
+};
+
+Object.prototype[0] = false;
+Object.defineProperty(obj, "0", {
+  get: function() {
+    return true;
+  },
+  configurable: true
+});
+
+assert.sameValue(Array.prototype.indexOf.call(obj, true), 0, 'Array.prototype.indexOf.call(obj, true)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-b-i-13.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-b-i-13.js
new file mode 100644
index 0000000000..0012f6e311
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-b-i-13.js
@@ -0,0 +1,29 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf - element to be retrieved is own accessor
+    property that overrides an inherited accessor property on an Array
+---*/
+
+var arr = [];
+
+Object.defineProperty(Array.prototype, "0", {
+  get: function() {
+    return false;
+  },
+  configurable: true
+});
+
+Object.defineProperty(arr, "0", {
+  get: function() {
+    return true;
+  },
+  configurable: true
+});
+
+assert.sameValue(arr.indexOf(true), 0, 'arr.indexOf(true)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-b-i-14.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-b-i-14.js
new file mode 100644
index 0000000000..74e757e7a2
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-b-i-14.js
@@ -0,0 +1,32 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf - element to be retrieved is own accessor
+    property that overrides an inherited accessor property on an
+    Array-like object
+---*/
+
+var obj = {
+  length: 1
+};
+
+Object.defineProperty(Object.prototype, "0", {
+  get: function() {
+    return false;
+  },
+  configurable: true
+});
+
+Object.defineProperty(obj, "0", {
+  get: function() {
+    return true;
+  },
+  configurable: true
+});
+
+assert.sameValue(Array.prototype.indexOf.call(obj, true), 0, 'Array.prototype.indexOf.call(obj, true)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-b-i-15.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-b-i-15.js
new file mode 100644
index 0000000000..26704a212e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-b-i-15.js
@@ -0,0 +1,36 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf - element to be retrieved is inherited
+    accessor property on an Array
+---*/
+
+Object.defineProperty(Array.prototype, "0", {
+  get: function() {
+    return 10;
+  },
+  configurable: true
+});
+
+Object.defineProperty(Array.prototype, "1", {
+  get: function() {
+    return 20;
+  },
+  configurable: true
+});
+
+Object.defineProperty(Array.prototype, "2", {
+  get: function() {
+    return 30;
+  },
+  configurable: true
+});
+
+assert.sameValue([, , , ].indexOf(10), 0, '[, , , ].indexOf(10)');
+assert.sameValue([, , , ].indexOf(20), 1, '[, , , ].indexOf(20)');
+assert.sameValue([, , , ].indexOf(30), 2, '[, , , ].indexOf(30)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-b-i-16.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-b-i-16.js
new file mode 100644
index 0000000000..bc2fb17e56
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-b-i-16.js
@@ -0,0 +1,42 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf - element to be retrieved is inherited
+    accessor property on an Array-like object
+---*/
+
+Object.defineProperty(Object.prototype, "0", {
+  get: function() {
+    return 10;
+  },
+  configurable: true
+});
+
+Object.defineProperty(Object.prototype, "1", {
+  get: function() {
+    return 20;
+  },
+  configurable: true
+});
+
+Object.defineProperty(Object.prototype, "2", {
+  get: function() {
+    return 30;
+  },
+  configurable: true
+});
+
+assert.sameValue(Array.prototype.indexOf.call({
+  length: 3
+}, 10), 0, 'Array.prototype.indexOf.call({ length: 3 }, 10)');
+assert.sameValue(Array.prototype.indexOf.call({
+  length: 3
+}, 20), 1, 'Array.prototype.indexOf.call({ length: 3 }, 20)');
+assert.sameValue(Array.prototype.indexOf.call({
+  length: 3
+}, 30), 2, 'Array.prototype.indexOf.call({ length: 3 }, 30)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-b-i-17.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-b-i-17.js
new file mode 100644
index 0000000000..2f3130b034
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-b-i-17.js
@@ -0,0 +1,19 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf - element to be retrieved is own accessor
+    property without a get function on an Array
+---*/
+
+var arr = [];
+Object.defineProperty(arr, "0", {
+  set: function() {},
+  configurable: true
+});
+
+assert.sameValue(arr.indexOf(undefined), 0, 'arr.indexOf(undefined)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-b-i-18.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-b-i-18.js
new file mode 100644
index 0000000000..56c27077e8
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-b-i-18.js
@@ -0,0 +1,21 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf - element to be retrieved is own accessor
+    property without a get function on an Array-like object
+---*/
+
+var obj = {
+  length: 1
+};
+Object.defineProperty(obj, "0", {
+  set: function() {},
+  configurable: true
+});
+
+assert.sameValue(Array.prototype.indexOf.call(obj, undefined), 0, 'Array.prototype.indexOf.call(obj, undefined)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-b-i-19.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-b-i-19.js
new file mode 100644
index 0000000000..c0f708a2fa
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-b-i-19.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf - element to be retrieved is own accessor
+    property without a get function that overrides an inherited
+    accessor property on an Array
+---*/
+
+var arr = [];
+
+Object.defineProperty(arr, "0", {
+  set: function() {},
+  configurable: true
+});
+
+Object.defineProperty(Array.prototype, "0", {
+  get: function() {
+    return 2;
+  },
+  configurable: true
+});
+
+assert.sameValue(arr.indexOf(undefined), 0, 'arr.indexOf(undefined)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-b-i-2.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-b-i-2.js
new file mode 100644
index 0000000000..d06628706e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-b-i-2.js
@@ -0,0 +1,15 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf - element to be retrieved is own data
+    property on an Array
+---*/
+
+assert.sameValue([true, true, true].indexOf(true), 0, '[true, true, true].indexOf(true)');
+assert.sameValue([false, true, true].indexOf(true), 1, '[false, true, true].indexOf(true)');
+assert.sameValue([false, false, true].indexOf(true), 2, '[false, false, true].indexOf(true)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-b-i-20.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-b-i-20.js
new file mode 100644
index 0000000000..105908b5ba
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-b-i-20.js
@@ -0,0 +1,33 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf - element to be retrieved is own accessor
+    property without a get function that overrides an inherited
+    accessor property on an Array-like object
+---*/
+
+var proto = {};
+Object.defineProperty(proto, "0", {
+  get: function() {
+    return 2;
+  },
+  configurable: true
+});
+
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+child.length = 1;
+
+Object.defineProperty(child, "0", {
+  set: function() {},
+  configurable: true
+});
+
+assert.sameValue(Array.prototype.indexOf.call(child, undefined), 0, 'Array.prototype.indexOf.call(child, undefined)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-b-i-21.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-b-i-21.js
new file mode 100644
index 0000000000..7b237f90b9
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-b-i-21.js
@@ -0,0 +1,18 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf - element to be retrieved is inherited
+    accessor property without a get function on an Array
+---*/
+
+Object.defineProperty(Array.prototype, "0", {
+  set: function() {},
+  configurable: true
+});
+
+assert.sameValue([, ].indexOf(undefined), 0, '[, ].indexOf(undefined)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-b-i-22.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-b-i-22.js
new file mode 100644
index 0000000000..b1226745a7
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-b-i-22.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf - element to be retrieved is inherited
+    accessor property without a get function on an Array-like object
+---*/
+
+Object.defineProperty(Object.prototype, "0", {
+  set: function() {},
+  configurable: true
+});
+
+assert.sameValue(Array.prototype.indexOf.call({
+  length: 1
+}, undefined), 0, 'Array.prototype.indexOf.call({ length: 1 }, undefined)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-b-i-25.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-b-i-25.js
new file mode 100644
index 0000000000..afbf121932
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-b-i-25.js
@@ -0,0 +1,19 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf applied to Arguments object which
+    implements its own property get method (number of arguments is
+    less than number of parameters)
+---*/
+
+var func = function(a, b) {
+  return 0 === Array.prototype.indexOf.call(arguments, arguments[0]) &&
+    -1 === Array.prototype.indexOf.call(arguments, arguments[1]);
+};
+
+assert(func(true), 'func(true) !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-b-i-26.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-b-i-26.js
new file mode 100644
index 0000000000..216c06e40e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-b-i-26.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf applied to Arguments object which
+    implements its own property get method (number of arguments equals
+    to number of parameters)
+---*/
+
+var func = function(a, b) {
+  return 0 === Array.prototype.indexOf.call(arguments, arguments[0]) &&
+    1 === Array.prototype.indexOf.call(arguments, arguments[1]) &&
+    -1 === Array.prototype.indexOf.call(arguments, arguments[2]);
+};
+
+assert(func(0, true), 'func(0, true) !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-b-i-27.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-b-i-27.js
new file mode 100644
index 0000000000..d221275e6b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-b-i-27.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf applied to Arguments object which
+    implements its own property get method (number of arguments is
+    greater than number of parameters)
+---*/
+
+var func = function(a, b) {
+  return 0 === Array.prototype.indexOf.call(arguments, arguments[0]) &&
+    3 === Array.prototype.indexOf.call(arguments, arguments[3]) &&
+    -1 === Array.prototype.indexOf.call(arguments, arguments[4]);
+};
+
+assert(func(0, false, 0, true), 'func(0, false, 0, true) !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-b-i-28.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-b-i-28.js
new file mode 100644
index 0000000000..bfb2296e7c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-b-i-28.js
@@ -0,0 +1,35 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf - side-effects are visible in subsequent
+    iterations on an Array
+---*/
+
+var preIterVisible = false;
+var arr = [];
+
+Object.defineProperty(arr, "0", {
+  get: function() {
+    preIterVisible = true;
+    return false;
+  },
+  configurable: true
+});
+
+Object.defineProperty(arr, "1", {
+  get: function() {
+    if (preIterVisible) {
+      return true;
+    } else {
+      return false;
+    }
+  },
+  configurable: true
+});
+
+assert.sameValue(arr.indexOf(true), 1, 'arr.indexOf(true)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-b-i-29.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-b-i-29.js
new file mode 100644
index 0000000000..8043597a36
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-b-i-29.js
@@ -0,0 +1,37 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf - side-effects are visible in subsequent
+    iterations on an Array-like object
+---*/
+
+var preIterVisible = false;
+var obj = {
+  length: 2
+};
+
+Object.defineProperty(obj, "0", {
+  get: function() {
+    preIterVisible = true;
+    return false;
+  },
+  configurable: true
+});
+
+Object.defineProperty(obj, "1", {
+  get: function() {
+    if (preIterVisible) {
+      return true;
+    } else {
+      return false;
+    }
+  },
+  configurable: true
+});
+
+assert.sameValue(Array.prototype.indexOf.call(obj, true), 1, 'Array.prototype.indexOf.call(obj, true)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-b-i-3.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-b-i-3.js
new file mode 100644
index 0000000000..2f2b8d4ce3
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-b-i-3.js
@@ -0,0 +1,15 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf - element to be retrieved is own data
+    property that overrides an inherited data property on an Array
+---*/
+
+Array.prototype[0] = false;
+
+assert.sameValue([true].indexOf(true), 0, '[true].indexOf(true)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-b-i-30.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-b-i-30.js
new file mode 100644
index 0000000000..d70884aa1e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-b-i-30.js
@@ -0,0 +1,33 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf - terminates iteration on unhandled
+    exception on an Array
+---*/
+
+var accessed = false;
+var arr = [];
+
+Object.defineProperty(arr, "0", {
+  get: function() {
+    throw new TypeError();
+  },
+  configurable: true
+});
+
+Object.defineProperty(arr, "1", {
+  get: function() {
+    accessed = true;
+    return true;
+  },
+  configurable: true
+});
+assert.throws(TypeError, function() {
+  arr.indexOf(true);
+});
+assert.sameValue(accessed, false, 'accessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-b-i-31.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-b-i-31.js
new file mode 100644
index 0000000000..7d02c668dc
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-b-i-31.js
@@ -0,0 +1,35 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf - terminates iteration on unhandled
+    exception on an Array-like object
+---*/
+
+var accessed = false;
+var obj = {
+  length: 2
+};
+
+Object.defineProperty(obj, "0", {
+  get: function() {
+    throw new TypeError();
+  },
+  configurable: true
+});
+
+Object.defineProperty(obj, "1", {
+  get: function() {
+    accessed = true;
+    return true;
+  },
+  configurable: true
+});
+assert.throws(TypeError, function() {
+  Array.prototype.indexOf.call(obj, true);
+});
+assert.sameValue(accessed, false, 'accessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-b-i-4.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-b-i-4.js
new file mode 100644
index 0000000000..5b84ca1310
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-b-i-4.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf - element to be retrieved is own data
+    property that overrides an inherited data property on an
+    Array-like object
+---*/
+
+Object.prototype[0] = false;
+
+assert.sameValue(Array.prototype.indexOf.call({
+  0: true,
+  1: 1,
+  length: 2
+}, true), 0, 'Array.prototype.indexOf.call({ 0: true, 1: 1, length: 2 }, true)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-b-i-5.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-b-i-5.js
new file mode 100644
index 0000000000..dbe3b1f86e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-b-i-5.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf - element to be retrieved is own data
+    property that overrides an inherited accessor property on an Array
+---*/
+
+Object.defineProperty(Array.prototype, "0", {
+  get: function() {
+    return false;
+  },
+  configurable: true
+});
+
+assert.sameValue([true].indexOf(true), 0, '[true].indexOf(true)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-b-i-6.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-b-i-6.js
new file mode 100644
index 0000000000..f95381e58e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-b-i-6.js
@@ -0,0 +1,25 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf - element to be retrieved is own data
+    property that overrides an inherited accessor property on an
+    Array-like object
+---*/
+
+Object.defineProperty(Object.prototype, "0", {
+  get: function() {
+    return false;
+  },
+  configurable: true
+});
+
+assert.sameValue(Array.prototype.indexOf.call({
+  0: true,
+  1: 1,
+  length: 2
+}, true), 0, 'Array.prototype.indexOf.call({ 0: true, 1: 1, length: 2 }, true)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-b-i-7.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-b-i-7.js
new file mode 100644
index 0000000000..b234373741
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-b-i-7.js
@@ -0,0 +1,19 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf - element to be retrieved is inherited
+    data property on an Array
+---*/
+
+Array.prototype[0] = true;
+Array.prototype[1] = false;
+Array.prototype[2] = "true";
+
+assert.sameValue([, , , ].indexOf(true), 0, '[, , , ].indexOf(true)');
+assert.sameValue([, , , ].indexOf(false), 1, '[, , , ].indexOf(false)');
+assert.sameValue([, , , ].indexOf("true"), 2, '[, , , ].indexOf("true")');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-b-i-8.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-b-i-8.js
new file mode 100644
index 0000000000..24d5761a1d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-b-i-8.js
@@ -0,0 +1,25 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf - element to be retrieved is inherited
+    data property on an Array-like object
+---*/
+
+Object.prototype[0] = true;
+Object.prototype[1] = false;
+Object.prototype[2] = "true";
+
+assert.sameValue(Array.prototype.indexOf.call({
+  length: 3
+}, true), 0, 'Array.prototype.indexOf.call({ length: 3 }, true)');
+assert.sameValue(Array.prototype.indexOf.call({
+  length: 3
+}, false), 1, 'Array.prototype.indexOf.call({ length: 3 }, false)');
+assert.sameValue(Array.prototype.indexOf.call({
+  length: 3
+}, "true"), 2, 'Array.prototype.indexOf.call({ length: 3 }, "true")');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-b-i-9.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-b-i-9.js
new file mode 100644
index 0000000000..bfcea0e115
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-b-i-9.js
@@ -0,0 +1,37 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf - element to be retrieved is own accessor
+    property on an Array
+---*/
+
+var arr = [, , , ];
+Object.defineProperty(arr, "0", {
+  get: function() {
+    return 0;
+  },
+  configurable: true
+});
+
+Object.defineProperty(arr, "1", {
+  get: function() {
+    return 1;
+  },
+  configurable: true
+});
+
+Object.defineProperty(arr, "2", {
+  get: function() {
+    return 2;
+  },
+  configurable: true
+});
+
+assert.sameValue(arr.indexOf(0), 0, 'arr.indexOf(0)');
+assert.sameValue(arr.indexOf(1), 1, 'arr.indexOf(1)');
+assert.sameValue(arr.indexOf(2), 2, 'arr.indexOf(2)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-b-ii-1.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-b-ii-1.js
new file mode 100644
index 0000000000..0501809791
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-b-ii-1.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf - type of array element is different from
+    type of search element
+---*/
+
+assert.sameValue(["true"].indexOf(true), -1, '["true"].indexOf(true)');
+assert.sameValue(["0"].indexOf(0), -1, '["0"].indexOf(0)');
+assert.sameValue([false].indexOf(0), -1, '[false].indexOf(0)');
+assert.sameValue([undefined].indexOf(0), -1, '[undefined].indexOf(0)');
+assert.sameValue([null].indexOf(0), -1, '[null].indexOf(0)');
+assert.sameValue([
+  []
+].indexOf(0), -1, '[[]].indexOf(0)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-b-ii-10.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-b-ii-10.js
new file mode 100644
index 0000000000..d264b74681
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-b-ii-10.js
@@ -0,0 +1,13 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf - both array element and search element
+    are Boolean type, and they have same value
+---*/
+
+assert.sameValue([false, true].indexOf(true), 1, '[false, true].indexOf(true)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-b-ii-11.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-b-ii-11.js
new file mode 100644
index 0000000000..c6049a525f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-b-ii-11.js
@@ -0,0 +1,17 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf - both array element and search element
+    are Object type, and they refer to the same object
+---*/
+
+var obj1 = {};
+var obj2 = {};
+var obj3 = obj2;
+
+assert.sameValue([{}, obj1, obj2].indexOf(obj3), 2, '[{}, obj1, obj2].indexOf(obj3)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-b-ii-2.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-b-ii-2.js
new file mode 100644
index 0000000000..cc60a23dab
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-b-ii-2.js
@@ -0,0 +1,14 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf - both type of array element and type of
+    search element are Undefined
+---*/
+
+assert.sameValue([undefined].indexOf(), 0, '[undefined].indexOf()');
+assert.sameValue([undefined].indexOf(undefined), 0, '[undefined].indexOf(undefined)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-b-ii-3.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-b-ii-3.js
new file mode 100644
index 0000000000..d7f0c7c3f5
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-b-ii-3.js
@@ -0,0 +1,13 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf - both type of array element and type of
+    search element are null
+---*/
+
+assert.sameValue([null].indexOf(null), 0, '[null].indexOf(null)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-b-ii-4.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-b-ii-4.js
new file mode 100644
index 0000000000..707a6a95cb
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-b-ii-4.js
@@ -0,0 +1,11 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: Array.prototype.indexOf - search element is NaN
+---*/
+
+assert.sameValue([+NaN, NaN, -NaN].indexOf(NaN), -1, '[+NaN, NaN, -NaN].indexOf(NaN)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-b-ii-5.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-b-ii-5.js
new file mode 100644
index 0000000000..fde2293094
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-b-ii-5.js
@@ -0,0 +1,11 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: Array.prototype.indexOf - search element is -NaN
+---*/
+
+assert.sameValue([+NaN, NaN, -NaN].indexOf(-NaN), -1, '[+NaN, NaN, -NaN].indexOf(-NaN)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-b-ii-6.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-b-ii-6.js
new file mode 100644
index 0000000000..aa80981cc5
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-b-ii-6.js
@@ -0,0 +1,13 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf - array element is +0 and search element
+    is -0
+---*/
+
+assert.sameValue([+0].indexOf(-0), 0, '[+0].indexOf(-0)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-b-ii-7.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-b-ii-7.js
new file mode 100644
index 0000000000..8ab2bc1025
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-b-ii-7.js
@@ -0,0 +1,13 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf - array element is -0 and search element
+    is +0
+---*/
+
+assert.sameValue([-0].indexOf(+0), 0, '[-0].indexOf(+0)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-b-ii-8.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-b-ii-8.js
new file mode 100644
index 0000000000..a94629ab4e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-b-ii-8.js
@@ -0,0 +1,13 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf - both array element and search element
+    are Number, and they have same value
+---*/
+
+assert.sameValue([-1, 0, 1].indexOf(1), 2, '[-1, 0, 1].indexOf(1)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-b-ii-9.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-b-ii-9.js
new file mode 100644
index 0000000000..514461bb32
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-b-ii-9.js
@@ -0,0 +1,13 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf - both array element and search element
+    are String, and they have exactly the same sequence of characters
+---*/
+
+assert.sameValue(["", "ab", "bca", "abc"].indexOf("abc"), 3, '["", "ab", "bca", "abc"].indexOf("abc")');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-b-iii-1.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-b-iii-1.js
new file mode 100644
index 0000000000..3ca832f862
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-b-iii-1.js
@@ -0,0 +1,13 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf - returns index of last one when more than
+    two elements in array are eligible
+---*/
+
+assert.sameValue([1, 2, 2, 1, 2].indexOf(2), 1, '[1, 2, 2, 1, 2].indexOf(2)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-b-iii-2.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-b-iii-2.js
new file mode 100644
index 0000000000..cf0f4fb3c0
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/15.4.4.14-9-b-iii-2.js
@@ -0,0 +1,35 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+    Array.prototype.indexOf - returns without visiting subsequent
+    element once search value is found
+---*/
+
+var arr = [1, 2, , 1, 2];
+var elementThirdAccessed = false;
+var elementFifthAccessed = false;
+
+Object.defineProperty(arr, "2", {
+  get: function() {
+    elementThirdAccessed = true;
+    return 2;
+  },
+  configurable: true
+});
+Object.defineProperty(arr, "4", {
+  get: function() {
+    elementFifthAccessed = true;
+    return 2;
+  },
+  configurable: true
+});
+
+arr.indexOf(2);
+
+assert.sameValue(elementThirdAccessed, false, 'elementThirdAccessed');
+assert.sameValue(elementFifthAccessed, false, 'elementFifthAccessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/browser.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/browser.js
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/call-with-boolean.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/call-with-boolean.js
new file mode 100644
index 0000000000..b39ac9944b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/call-with-boolean.js
@@ -0,0 +1,12 @@
+// Copyright (c) 2020 Rick Waldron.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexOf
+description: Array.prototype.indexOf applied to boolean primitive
+---*/
+
+assert.sameValue(Array.prototype.indexOf.call(true), -1, 'Array.prototype.indexOf.call(true) must return -1');
+assert.sameValue(Array.prototype.indexOf.call(false), -1, 'Array.prototype.indexOf.call(false) must return -1');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/calls-only-has-on-prototype-after-length-zeroed.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/calls-only-has-on-prototype-after-length-zeroed.js
new file mode 100644
index 0000000000..fb95f97899
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/calls-only-has-on-prototype-after-length-zeroed.js
@@ -0,0 +1,45 @@
+// Copyright (C) 2018 André Bargull. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+  Calls [[HasProperty]] on the prototype to check for existing elements.
+info: |
+  22.1.3.12 Array.prototype.indexOf ( searchElement [ , fromIndex ] )
+
+  ...
+  2. Let len be ? ToLength(? Get(O, "length")).
+  ...
+  4. Let n be ? ToInteger(fromIndex). (If fromIndex is undefined, this step produces the value 0.)
+  ...
+  8. Repeat, while k < len
+    a. Let kPresent be ? HasProperty(O, ! ToString(k)).
+    b. If kPresent is true, then
+      i. Let elementK be ? Get(O, ! ToString(k)).
+      ...
+includes: [proxyTrapsHelper.js]
+features: [Proxy]
+---*/
+
+var array = [1, null, 3];
+
+Object.setPrototypeOf(array, new Proxy(Array.prototype, allowProxyTraps({
+    has: function(t, pk) {
+        return pk in t;
+    }
+})));
+
+var fromIndex = {
+    valueOf: function() {
+        // Zero the array's length. The loop in step 8 iterates over the original
+        // length value of 100, but the only prototype MOP method which should be
+        // called is [[HasProperty]].
+        array.length = 0;
+        return 0;
+    }
+};
+
+Array.prototype.indexOf.call(array, 100, fromIndex);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/fromindex-zero-conversion.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/fromindex-zero-conversion.js
new file mode 100644
index 0000000000..721d5db763
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/fromindex-zero-conversion.js
@@ -0,0 +1,18 @@
+// Copyright 2016 The V8 project authors. All rights reserved.
+// This code is governed by the license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.indexof
+description: >
+  Return +0 when fromIndex is -0 and return index refers to the first position
+info: |
+  22.1.3.12 Array.prototype.indexOf ( searchElement [ , fromIndex ] )
+
+  ...
+  6. If n ≥ 0, then
+    a. If n is -0, let k be +0; else let k be n.
+  ...
+---*/
+
+assert.sameValue(1 / [true].indexOf(true, -0), +Infinity)
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/length-near-integer-limit.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/length-near-integer-limit.js
new file mode 100644
index 0000000000..5dddc31aaf
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/length-near-integer-limit.js
@@ -0,0 +1,37 @@
+// Copyright (C) 2020 Alexey Shvayka. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+  Elements are found in an array-like object
+  whose "length" property is near the integer limit.
+info: |
+  Array.prototype.indexOf ( searchElement [ , fromIndex ] )
+
+  1. Let O be ? ToObject(this value).
+  2. Let len be ? LengthOfArrayLike(O).
+  [...]
+  9. Repeat, while k < len
+    a. Let kPresent be ? HasProperty(O, ! ToString(k)).
+    b. If kPresent is true, then
+      i. Let elementK be ? Get(O, ! ToString(k)).
+      ii. Let same be the result of performing Strict Equality Comparison searchElement === elementK.
+      iii. If same is true, return k.
+    [...]
+---*/
+
+var el = {};
+var elIndex = Number.MAX_SAFE_INTEGER - 1;
+var fromIndex = Number.MAX_SAFE_INTEGER - 3;
+var arrayLike = {
+  length: Number.MAX_SAFE_INTEGER,
+};
+
+arrayLike[elIndex] = el;
+
+var res = Array.prototype.indexOf.call(arrayLike, el, fromIndex);
+
+assert.sameValue(res, elIndex);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/length-zero-returns-minus-one.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/length-zero-returns-minus-one.js
new file mode 100644
index 0000000000..aacbec9710
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/length-zero-returns-minus-one.js
@@ -0,0 +1,24 @@
+// Copyright (C) 2020 Alexey Shvayka. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.indexof
+description: >
+  Returns -1 if length is 0.
+info: |
+  Array.prototype.indexOf ( searchElement [ , fromIndex ] )
+
+  1. Let O be ? ToObject(this value).
+  2. Let len be ? LengthOfArrayLike(O).
+  3. If len is 0, return -1.
+---*/
+
+var fromIndex = {
+  valueOf: function() {
+    throw new Test262Error("Length should be checked before ToInteger(fromIndex).");
+  },
+};
+
+assert.sameValue([].indexOf(1), -1);
+assert.sameValue([].indexOf(2, fromIndex), -1);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/length.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/length.js
new file mode 100644
index 0000000000..36a44e19dc
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/length.js
@@ -0,0 +1,30 @@
+// Copyright (C) 2017 Leo Balter. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+  The "length" property of Array.prototype.indexOf
+info: |
+  17 ECMAScript Standard Built-in Objects
+
+  Every built-in function object, including constructors, has a length property
+  whose value is an integer. Unless otherwise specified, this value is equal to
+  the largest number of named arguments shown in the subclause headings for the
+  function description. Optional parameters (which are indicated with brackets:
+  [ ]) or rest parameters (which are shown using the form «...name») are not
+  included in the default argument count.
+
+  Unless otherwise specified, the length property of a built-in function object
+  has the attributes { [[Writable]]: false, [[Enumerable]]: false,
+    [[Configurable]]: true }.
+includes: [propertyHelper.js]
+---*/
+
+assert.sameValue(Array.prototype.indexOf.length, 1);
+
+verifyNotEnumerable(Array.prototype.indexOf, 'length');
+verifyNotWritable(Array.prototype.indexOf, 'length');
+verifyConfigurable(Array.prototype.indexOf, 'length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/name.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/name.js
new file mode 100644
index 0000000000..5017f4381c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/name.js
@@ -0,0 +1,28 @@
+// Copyright (C) 2015 André Bargull. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+  Array.prototype.indexOf.name is "indexOf".
+info: |
+  Array.prototype.indexOf ( searchElement [ , fromIndex ] )
+
+  17 ECMAScript Standard Built-in Objects:
+    Every built-in Function object, including constructors, that is not
+    identified as an anonymous function has a name property whose value
+    is a String.
+
+    Unless otherwise specified, the name property of a built-in Function
+    object, if it exists, has the attributes { [[Writable]]: false,
+    [[Enumerable]]: false, [[Configurable]]: true }.
+includes: [propertyHelper.js]
+---*/
+
+assert.sameValue(Array.prototype.indexOf.name, "indexOf");
+
+verifyNotEnumerable(Array.prototype.indexOf, "name");
+verifyNotWritable(Array.prototype.indexOf, "name");
+verifyConfigurable(Array.prototype.indexOf, "name");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/not-a-constructor.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/not-a-constructor.js
new file mode 100644
index 0000000000..d297029668
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/not-a-constructor.js
@@ -0,0 +1,35 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Array.prototype.indexOf does not implement [[Construct]], is not new-able
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+
+  sec-evaluatenew
+
+  ...
+  7. If IsConstructor(constructor) is false, throw a TypeError exception.
+  ...
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Array.prototype.indexOf),
+  false,
+  'isConstructor(Array.prototype.indexOf) must return false'
+);
+
+assert.throws(TypeError, () => {
+  new Array.prototype.indexOf();
+}, '`new Array.prototype.indexOf()` throws TypeError');
+
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/prop-desc.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/prop-desc.js
new file mode 100644
index 0000000000..dd6ecb2cb3
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/prop-desc.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2017 Leo Balter. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.indexof
+description: >
+  "indexOf" property of Array.prototype
+info: |
+  17 ECMAScript Standard Built-in Objects
+  
+  Every other data property described in clauses 18 through 26 and in Annex B.2
+  has the attributes { [[Writable]]: true, [[Enumerable]]: false,
+    [[Configurable]]: true } unless otherwise specified.
+includes: [propertyHelper.js]
+---*/
+
+assert.sameValue(typeof Array.prototype.indexOf, 'function', 'typeof');
+
+verifyNotEnumerable(Array.prototype, "indexOf");
+verifyWritable(Array.prototype, "indexOf");
+verifyConfigurable(Array.prototype, "indexOf");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/indexOf/shell.js b/js/src/tests/test262/built-ins/Array/prototype/indexOf/shell.js
new file mode 100644
index 0000000000..bc72493f03
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/indexOf/shell.js
@@ -0,0 +1,33 @@
+// GENERATED, DO NOT EDIT
+// file: proxyTrapsHelper.js
+// Copyright (C) 2016 Jordan Harband.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+description: |
+    Used to assert the correctness of object behavior in the presence
+    and context of Proxy objects.
+defines: [allowProxyTraps]
+---*/
+
+function allowProxyTraps(overrides) {
+  function throwTest262Error(msg) {
+    return function () { throw new Test262Error(msg); };
+  }
+  if (!overrides) { overrides = {}; }
+  return {
+    getPrototypeOf: overrides.getPrototypeOf || throwTest262Error('[[GetPrototypeOf]] trap called'),
+    setPrototypeOf: overrides.setPrototypeOf || throwTest262Error('[[SetPrototypeOf]] trap called'),
+    isExtensible: overrides.isExtensible || throwTest262Error('[[IsExtensible]] trap called'),
+    preventExtensions: overrides.preventExtensions || throwTest262Error('[[PreventExtensions]] trap called'),
+    getOwnPropertyDescriptor: overrides.getOwnPropertyDescriptor || throwTest262Error('[[GetOwnProperty]] trap called'),
+    has: overrides.has || throwTest262Error('[[HasProperty]] trap called'),
+    get: overrides.get || throwTest262Error('[[Get]] trap called'),
+    set: overrides.set || throwTest262Error('[[Set]] trap called'),
+    deleteProperty: overrides.deleteProperty || throwTest262Error('[[Delete]] trap called'),
+    defineProperty: overrides.defineProperty || throwTest262Error('[[DefineOwnProperty]] trap called'),
+    enumerate: throwTest262Error('[[Enumerate]] trap called: this trap has been removed'),
+    ownKeys: overrides.ownKeys || throwTest262Error('[[OwnPropertyKeys]] trap called'),
+    apply: overrides.apply || throwTest262Error('[[Call]] trap called'),
+    construct: overrides.construct || throwTest262Error('[[Construct]] trap called')
+  };
+}
diff --git a/js/src/tests/test262/built-ins/Array/prototype/join/S15.4.4.5_A1.1_T1.js b/js/src/tests/test262/built-ins/Array/prototype/join/S15.4.4.5_A1.1_T1.js
new file mode 100644
index 0000000000..3fb2f83124
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/join/S15.4.4.5_A1.1_T1.js
@@ -0,0 +1,22 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: If length is zero, return the empty string
+esid: sec-array.prototype.join
+description: Checking this use new Array() and []
+---*/
+
+var x = new Array();
+if (x.join() !== "") {
+  throw new Test262Error('#1: x = new Array(); x.join() === "". Actual: ' + (x.join()));
+}
+
+x = [];
+x[0] = 1;
+x.length = 0;
+if (x.join() !== "") {
+  throw new Test262Error('#2: x = []; x[0] = 1; x.length = 0; x.join() === "". Actual: ' + (x.join()));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/join/S15.4.4.5_A1.2_T1.js b/js/src/tests/test262/built-ins/Array/prototype/join/S15.4.4.5_A1.2_T1.js
new file mode 100644
index 0000000000..4107dafdb2
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/join/S15.4.4.5_A1.2_T1.js
@@ -0,0 +1,28 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: If separator is undefined, a single comma is used as the separator
+esid: sec-array.prototype.join
+description: Checking this use new Array() and []
+---*/
+
+var x = new Array(0, 1, 2, 3);
+if (x.join() !== "0,1,2,3") {
+  throw new Test262Error('#1: x = new Array(0,1,2,3); x.join() === "0,1,2,3". Actual: ' + (x.join()));
+}
+
+x = [];
+x[0] = 0;
+x[3] = 3;
+if (x.join() !== "0,,,3") {
+  throw new Test262Error('#2: x = []; x[0] = 0; x[3] = 3; x.join() === "0,,,3". Actual: ' + (x.join()));
+}
+
+x = [];
+x[0] = 0;
+if (x.join() !== "0") {
+  throw new Test262Error('#3: x = []; x[0] = 0; x.join() === "0". Actual: ' + (x.join()));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/join/S15.4.4.5_A1.2_T2.js b/js/src/tests/test262/built-ins/Array/prototype/join/S15.4.4.5_A1.2_T2.js
new file mode 100644
index 0000000000..bea80dc36e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/join/S15.4.4.5_A1.2_T2.js
@@ -0,0 +1,28 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: If separator is undefined, a single comma is used as the separator
+esid: sec-array.prototype.join
+description: Checking this use new Array() and []
+---*/
+
+var x = new Array(0, 1, 2, 3);
+if (x.join(undefined) !== "0,1,2,3") {
+  throw new Test262Error('#1: x = new Array(0,1,2,3); x.join(undefined) === "0,1,2,3". Actual: ' + (x.join(undefined)));
+}
+
+x = [];
+x[0] = 0;
+x[3] = 3;
+if (x.join(undefined) !== "0,,,3") {
+  throw new Test262Error('#2: x = []; x[0] = 0; x[3] = 3; x.join(undefined) === "0,,,3". Actual: ' + (x.join(undefined)));
+}
+
+x = [];
+x[0] = 0;
+if (x.join(undefined) !== "0") {
+  throw new Test262Error('#3: x = []; x[0] = 0; x.join(undefined) === "0". Actual: ' + (x.join(undefined)));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/join/S15.4.4.5_A1.3_T1.js b/js/src/tests/test262/built-ins/Array/prototype/join/S15.4.4.5_A1.3_T1.js
new file mode 100644
index 0000000000..23c0bf98aa
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/join/S15.4.4.5_A1.3_T1.js
@@ -0,0 +1,27 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: If array element is undefined or null, use the empty string
+esid: sec-array.prototype.join
+description: Checking this use new Array() and []
+---*/
+
+var x = [];
+x[0] = undefined;
+if (x.join() !== "") {
+  throw new Test262Error('#1: x = []; x[0] = undefined; x.join() === "". Actual: ' + (x.join()));
+}
+
+x = [];
+x[0] = null;
+if (x.join() !== "") {
+  throw new Test262Error('#2: x = []; x[0] = null; x.join() === "". Actual: ' + (x.join()));
+}
+
+x = Array(undefined, 1, null, 3);
+if (x.join() !== ",1,,3") {
+  throw new Test262Error('#3: x = Array(undefined,1,null,3); x.join() === ",1,,3". Actual: ' + (x.join()));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/join/S15.4.4.5_A2_T1.js b/js/src/tests/test262/built-ins/Array/prototype/join/S15.4.4.5_A2_T1.js
new file mode 100644
index 0000000000..3767112626
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/join/S15.4.4.5_A2_T1.js
@@ -0,0 +1,44 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    The join function is intentionally generic.
+    It does not require that its this value be an Array object
+esid: sec-array.prototype.join
+description: If ToUint32(length) is zero, return the empty string
+---*/
+
+var obj = {};
+obj.join = Array.prototype.join;
+
+if (obj.length !== undefined) {
+  throw new Test262Error('#0: var obj = {}; obj.length === undefined. Actual: ' + (obj.length));
+} else {
+  if (obj.join() !== "") {
+    throw new Test262Error('#1: var obj = {}; obj.join = Array.prototype.join; obj.join() === "". Actual: ' + (obj.join()));
+  }
+  if (obj.length !== undefined) {
+    throw new Test262Error('#2: var obj = {}; obj.join = Array.prototype.join; obj.join(); obj.length === undefined. Actual: ' + (obj.length));
+  }
+}
+
+obj.length = undefined;
+if (obj.join() !== "") {
+  throw new Test262Error('#3: var obj = {}; obj.length = undefined; obj.join = Array.prototype.join; obj.join() === ". Actual: ' + (obj.join()));
+}
+
+if (obj.length !== undefined) {
+  throw new Test262Error('#4: var obj = {}; obj.length = undefined; obj.join = Array.prototype.join; obj.join(); obj.length === undefined. Actual: ' + (obj.length));
+}
+
+obj.length = null
+if (obj.join() !== "") {
+  throw new Test262Error('#5: var obj = {}; obj.length = null; obj.join = Array.prototype.join; obj.join() === "". Actual: ' + (obj.join()));
+}
+
+if (obj.length !== null) {
+  throw new Test262Error('#6: var obj = {}; obj.length = null; obj.join = Array.prototype.join; obj.join(); obj.length === null. Actual: ' + (obj.length));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/join/S15.4.4.5_A2_T2.js b/js/src/tests/test262/built-ins/Array/prototype/join/S15.4.4.5_A2_T2.js
new file mode 100644
index 0000000000..ef3b1004ec
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/join/S15.4.4.5_A2_T2.js
@@ -0,0 +1,63 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    The join function is intentionally generic.
+    It does not require that its this value be an Array object
+esid: sec-array.prototype.join
+description: If ToUint32(length) is zero, return the empty string
+---*/
+
+var obj = {};
+obj.join = Array.prototype.join;
+
+obj.length = NaN;
+if (obj.join() !== "") {
+  throw new Test262Error('#1: var obj = {}; obj.length = NaN; obj.join = Array.prototype.join; obj.join() === "". Actual: ' + (obj.join()));
+}
+
+assert.sameValue(obj.length, NaN, "obj.length is NaN");
+
+obj.length = Number.NEGATIVE_INFINITY;
+if (obj.join() !== "") {
+  throw new Test262Error('#5: var obj = {}; obj.length = Number.NEGATIVE_INFINITY; obj.join = Array.prototype.join; obj.join() === "". Actual: ' + (obj.join()));
+}
+
+if (obj.length !== Number.NEGATIVE_INFINITY) {
+  throw new Test262Error('#6: var obj = {}; obj.length = Number.NEGATIVE_INFINITY; obj.join = Array.prototype.join; obj.join(); obj.length === Number.NEGATIVE_INFINITY. Actual: ' + (obj.length));
+}
+
+obj.length = -0;
+if (obj.join() !== "") {
+  throw new Test262Error('#7: var obj = {}; obj.length = -0; obj.join = Array.prototype.join; obj.join() === "". Actual: ' + (obj.join()));
+}
+
+if (obj.length !== -0) {
+  throw new Test262Error('#8: var obj = {}; obj.length = -0; obj.join = Array.prototype.join; obj.join(); obj.length === 0. Actual: ' + (obj.length));
+} else {
+  if (1 / obj.length !== Number.NEGATIVE_INFINITY) {
+    throw new Test262Error('#8: var obj = {}; obj.length = -0; obj.join = Array.prototype.join; obj.join(); obj.length === -0. Actual: ' + (obj.length));
+  }
+}
+
+obj.length = 0.5;
+if (obj.join() !== "") {
+  throw new Test262Error('#9: var obj = {}; obj.length = 0.5; obj.join = Array.prototype.join; obj.join() === "". Actual: ' + (obj.join()));
+}
+
+if (obj.length !== 0.5) {
+  throw new Test262Error('#10: var obj = {}; obj.length = 0.5; obj.join = Array.prototype.join; obj.join(); obj.length === 0.5. Actual: ' + (obj.length));
+}
+
+var x = new Number(0);
+obj.length = x;
+if (obj.join() !== "") {
+  throw new Test262Error('#11: var x = new Number(0); var obj = {}; obj.length = x; obj.join = Array.prototype.join; obj.join() === "". Actual: ' + (obj.join()));
+}
+
+if (obj.length !== x) {
+  throw new Test262Error('#12: var x = new Number(0); var obj = {}; obj.length = x; obj.join = Array.prototype.join; obj.join(); obj.length === x. Actual: ' + (obj.length));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/join/S15.4.4.5_A2_T3.js b/js/src/tests/test262/built-ins/Array/prototype/join/S15.4.4.5_A2_T3.js
new file mode 100644
index 0000000000..edd94bbfb1
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/join/S15.4.4.5_A2_T3.js
@@ -0,0 +1,51 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    The join function is intentionally generic.
+    It does not require that its this value be an Array object
+esid: sec-array.prototype.join
+description: If ToUint32(length) is zero, return the empty string
+---*/
+
+var obj = {};
+obj.join = Array.prototype.join;
+
+obj.length = 4.5;
+if (obj.join() !== ",,,") {
+  throw new Test262Error('#1: var obj = {}; obj.length = 4.5; obj.join = Array.prototype.join; obj.join() === ",,,". Actual: ' + (obj.join()));
+}
+
+obj[0] = undefined;
+obj[1] = 1;
+obj[2] = null;
+if (obj.join() !== ",1,,") {
+  throw new Test262Error('#1: var obj = {}; obj.length = 4.5; obj[0] = undefined; obj[1] = 1; obj[2] = null; obj.join = Array.prototype.join; obj.join() === ",1,,". Actual: ' + (obj.join()));
+}
+
+if (obj.length !== 4.5) {
+  throw new Test262Error('#1: var obj = {}; obj.length = 4.5; obj[0] = undefined; obj[1] = 1; obj[2] = null; obj.join = Array.prototype.join; obj.join(); obj.length === 4.5. Actual: ' + (obj.length));
+}
+
+var obj = {};
+obj.join = Array.prototype.join;
+
+var x = new Number(4.5);
+obj.length = x;
+if (obj.join() !== ",,,") {
+  throw new Test262Error('#4: var obj = {}; var x = new Number(4.5); obj.length = x; obj.join = Array.prototype.join; obj.join() === ",,,". Actual: ' + (obj.join()));
+}
+
+obj[0] = undefined;
+obj[1] = 1;
+obj[2] = null;
+if (obj.join() !== ",1,,") {
+  throw new Test262Error('#5: var obj = {}; var x = new Number(4.5); obj.length = x; obj[0] = undefined; obj[1] = 1; obj[2] = null; obj.join = Array.prototype.join; obj.join() === ",1,,". Actual: ' + (obj.join()));
+}
+
+if (obj.length !== x) {
+  throw new Test262Error('#6: var obj = {}; var x = new Number(4.5); obj.length = x; obj[0] = undefined; obj[1] = 1; obj[2] = null; obj.join = Array.prototype.join; obj.join(); obj.length === x. Actual: ' + (obj.length));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/join/S15.4.4.5_A2_T4.js b/js/src/tests/test262/built-ins/Array/prototype/join/S15.4.4.5_A2_T4.js
new file mode 100644
index 0000000000..a7b77ba974
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/join/S15.4.4.5_A2_T4.js
@@ -0,0 +1,95 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    The join function is intentionally generic.
+    It does not require that its this value be an Array object
+esid: sec-array.prototype.join
+description: >
+    Operator use ToNumber from length.  If Type(value) is Object,
+    evaluate ToPrimitive(value, Number)
+---*/
+
+var obj = {};
+obj.join = Array.prototype.join;
+
+obj.length = {
+  valueOf() {
+    return 3
+  }
+};
+assert.sameValue(obj.join(), ",,", 'obj.join() must return ",,"');
+
+obj.length = {
+  valueOf() {
+    return 3
+  },
+  toString() {
+    return 2
+  }
+};
+assert.sameValue(obj.join(), ",,", 'obj.join() must return ",,"');
+
+obj.length = {
+  valueOf() {
+    return 3
+  },
+  toString() {
+    return {}
+  }
+};
+assert.sameValue(obj.join(), ",,", 'obj.join() must return ",,"');
+
+obj.length = {
+  valueOf() {
+    return 3
+  },
+  toString() {
+    throw new Test262Error();
+  }
+};
+assert.sameValue(obj.join(), ",,", 'obj.join() must return ",,"');
+
+obj.length = {
+  toString() {
+    return 2
+  }
+};
+assert.sameValue(obj.join(), ",", 'obj.join() must return ","');
+
+obj.length = {
+  valueOf() {
+    return {}
+  },
+  toString() {
+    return 2
+  }
+}
+assert.sameValue(obj.join(), ",", 'obj.join() must return ","');
+
+assert.throws(Test262Error, () => {
+  obj.length = {
+    valueOf() {
+      throw new Test262Error();
+    },
+    toString() {
+      return 2
+    }
+  };
+  obj.join();
+});
+
+assert.throws(TypeError, () => {
+  obj.length = {
+    valueOf() {
+      return {}
+    },
+    toString() {
+      return {}
+    }
+  };
+  obj.join();
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/join/S15.4.4.5_A3.1_T1.js b/js/src/tests/test262/built-ins/Array/prototype/join/S15.4.4.5_A3.1_T1.js
new file mode 100644
index 0000000000..1f8dcd4d71
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/join/S15.4.4.5_A3.1_T1.js
@@ -0,0 +1,46 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: Operator use ToString from separator
+esid: sec-array.prototype.join
+description: >
+    Checking separator in ["", "\\", "&", true, Infinity, null,
+    undefind, NaN]
+---*/
+
+var x = new Array(0, 1, 2, 3);
+if (x.join("") !== "0123") {
+  throw new Test262Error('#0: x = new Array(0,1,2,3); x.join("") === "0123". Actual: ' + (x.join("")));
+}
+
+x = new Array(0, 1, 2, 3);
+if (x.join("\\") !== "0\\1\\2\\3") {
+  throw new Test262Error('#1: x = new Array(0,1,2,3); x.join("\\") === "0\\1\\2\\3". Actual: ' + (x.join("\\")));
+}
+
+if (x.join("&") !== "0&1&2&3") {
+  throw new Test262Error('#2: x = new Array(0,1,2,3); x.join("&") === "0&1&2&3". Actual: ' + (x.join("&")));
+}
+
+if (x.join(true) !== "0true1true2true3") {
+  throw new Test262Error('#3: x = new Array(0,1,2,3); x.join(true) === "0true1true2true3". Actual: ' + (x.join(true)));
+}
+
+if (x.join(Infinity) !== "0Infinity1Infinity2Infinity3") {
+  throw new Test262Error('#4: x = new Array(0,1,2,3); x.join(Infinity) === "0Infinity1Infinity2Infinity3". Actual: ' + (x.join(Infinity)));
+}
+
+if (x.join(null) !== "0null1null2null3") {
+  throw new Test262Error('#3: 5 = new Array(0,1,2,3); x.join(null) === "0null1null2null3". Actual: ' + (x.join(null)));
+}
+
+if (x.join(undefined) !== "0,1,2,3") {
+  throw new Test262Error('#6: x = new Array(0,1,2,3); x.join(undefined) === "0,1,2,3". Actual: ' + (x.join(undefined)));
+}
+
+if (x.join(NaN) !== "0NaN1NaN2NaN3") {
+  throw new Test262Error('#7: x = new Array(0,1,2,3); x.join(NaN) === "0NaN1NaN2NaN3". Actual: ' + (x.join(NaN)));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/join/S15.4.4.5_A3.1_T2.js b/js/src/tests/test262/built-ins/Array/prototype/join/S15.4.4.5_A3.1_T2.js
new file mode 100644
index 0000000000..7ceea3ef98
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/join/S15.4.4.5_A3.1_T2.js
@@ -0,0 +1,146 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: Operator use ToString from separator
+esid: sec-array.prototype.join
+description: >
+    If Type(separator) is Object, evaluate ToPrimitive(separator,
+    String)
+---*/
+
+var x = new Array(0, 1, 2, 3);
+var object = {
+  valueOf() {
+    return "+"
+  }
+};
+
+assert.sameValue(
+  x.join(object),
+  "0[object Object]1[object Object]2[object Object]3",
+  'x.join({valueOf() {return "+"}}) must return "0[object Object]1[object Object]2[object Object]3"'
+);
+
+var object = {
+  valueOf() {
+    return "+"
+  },
+  toString() {
+    return "*"
+  }
+};
+
+assert.sameValue(
+  x.join(object),
+  "0*1*2*3",
+  'x.join("{valueOf() {return "+"}, toString() {return "*"}}) must return "0*1*2*3"'
+);
+
+var object = {
+  valueOf() {
+    return "+"
+  },
+  toString() {
+    return {}
+  }
+};
+
+assert.sameValue(
+  x.join(object),
+  "0+1+2+3",
+  'x.join({valueOf() {return "+"}, toString() {return {}}}) must return "0+1+2+3"'
+);
+
+try {
+  var object = {
+    valueOf() {
+      throw "error"
+    },
+    toString() {
+      return "*"
+    }
+  };
+
+  assert.sameValue(
+    x.join(object),
+    "0*1*2*3",
+    'x.join("{valueOf() {throw "error"}, toString() {return "*"}}) must return "0*1*2*3"'
+  );
+}
+catch (e) {
+  assert.notSameValue(e, "error", 'The value of e is not "error"');
+}
+
+var object = {
+  toString() {
+    return "*"
+  }
+};
+assert.sameValue(x.join(object), "0*1*2*3", 'x.join({toString() {return "*"}}) must return "0*1*2*3"');
+
+var object = {
+  valueOf() {
+    return {}
+  },
+  toString() {
+    return "*"
+  }
+}
+
+assert.sameValue(
+  x.join(object),
+  "0*1*2*3",
+  'x.join({valueOf() {return {}}, toString() {return "*"}}) must return "0*1*2*3"'
+);
+
+try {
+  var object = {
+    valueOf() {
+      return "+"
+    },
+    toString() {
+      throw "error"
+    }
+  };
+  x.join(object);
+  throw new Test262Error('#7.1: var object = {valueOf() {return "+"}, toString() {throw "error"}}; x.join(object) throw "error". Actual: ' + (x.join(object)));
+}
+catch (e) {
+  assert.sameValue(e, "error", 'The value of e is expected to be "error"');
+}
+
+try {
+  var object = {
+    valueOf() {
+      return {}
+    },
+    toString() {
+      return {}
+    }
+  };
+  x.join(object);
+  throw new Test262Error('#8.1: var object = {valueOf() {return {}}, toString() {return {}}}; x.join(object) throw TypeError. Actual: ' + (x.join(object)));
+}
+catch (e) {
+  assert.sameValue(
+    e instanceof TypeError,
+    true,
+    'The result of evaluating (e instanceof TypeError) is expected to be true'
+  );
+}
+
+try {
+  var object = {
+    toString() {
+      throw "error"
+    }
+  };
+  [].join(object);
+  throw new Test262Error('#9.1: var object = {toString() {throw "error"}}; [].join(object) throw "error". Actual: ' + ([].join(object)));
+}
+catch (e) {
+  assert.sameValue(e, "error", 'The value of e is expected to be "error"');
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/join/S15.4.4.5_A3.2_T1.js b/js/src/tests/test262/built-ins/Array/prototype/join/S15.4.4.5_A3.2_T1.js
new file mode 100644
index 0000000000..bcea5c4239
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/join/S15.4.4.5_A3.2_T1.js
@@ -0,0 +1,52 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: Operator use ToString from array arguments
+esid: sec-array.prototype.join
+description: >
+    Checking arguments and separator in ["", "\\", "&", true,
+    Infinity, null, undefind, NaN]
+---*/
+
+var x = new Array("", "", "");
+if (x.join("") !== "") {
+  throw new Test262Error('#0: var x = new Array("","",""); x.join("") === "". Actual: ' + (x.join("")));
+}
+
+var x = new Array("\\", "\\", "\\");
+if (x.join("\\") !== "\\\\\\\\\\") {
+  throw new Test262Error('#1: var x = new Array("\\","\\","\\"); x.join("\\") === "\\\\\\\\\\". Actual: ' + (x.join("\\")));
+}
+
+var x = new Array("&", "&", "&");
+if (x.join("&") !== "&&&&&") {
+  throw new Test262Error('#2: var x = new Array("&", "&", "&"); x.join("&") === "&&&&&". Actual: ' + (x.join("&")));
+}
+
+var x = new Array(true, true, true);
+if (x.join() !== "true,true,true") {
+  throw new Test262Error('#3: var x = new Array(true,true,true); x.join(true,true,true) === "true,true,true". Actual: ' + (x.join(true, true, true)));
+}
+
+var x = new Array(null, null, null);
+if (x.join() !== ",,") {
+  throw new Test262Error('#4: var x = new Array(null,null,null); x.join(null,null,null) === ",,". Actual: ' + (x.join(null, null, null)));
+}
+
+var x = new Array(undefined, undefined, undefined);
+if (x.join() !== ",,") {
+  throw new Test262Error('#5: var x = new Array(undefined,undefined,undefined); x.join(undefined,undefined,undefined) === ",,". Actual: ' + (x.join(undefined, undefined, undefined)));
+}
+
+var x = new Array(Infinity, Infinity, Infinity);
+if (x.join() !== "Infinity,Infinity,Infinity") {
+  throw new Test262Error('#6: var x = new Array(Infinity,Infinity,Infinity); x.join(Infinity,Infinity,Infinity) === "Infinity,Infinity,Infinity". Actual: ' + (x.join(Infinity, Infinity, Infinity)));
+}
+
+var x = new Array(NaN, NaN, NaN);
+if (x.join() !== "NaN,NaN,NaN") {
+  throw new Test262Error('#7: var x = new Array(NaN,NaN,NaN); x.join(NaN,NaN,NaN) === "NaN,NaN,NaN". Actual: ' + (x.join(NaN, NaN, NaN)));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/join/S15.4.4.5_A3.2_T2.js b/js/src/tests/test262/built-ins/Array/prototype/join/S15.4.4.5_A3.2_T2.js
new file mode 100644
index 0000000000..047a76bed6
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/join/S15.4.4.5_A3.2_T2.js
@@ -0,0 +1,113 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: Operator use ToString from array arguments
+esid: sec-array.prototype.join
+description: If Type(argument) is Object, evaluate ToPrimitive(argument, String)
+---*/
+
+var object = {
+  valueOf: function() {
+    return "+"
+  }
+};
+var x = new Array(object);
+assert.sameValue(x.join(), "[object Object]", 'x.join() must return "[object Object]"');
+
+var object = {
+  valueOf: function() {
+    return "+"
+  },
+  toString: function() {
+    return "*"
+  }
+};
+var x = new Array(object);
+assert.sameValue(x.join(), "*", 'x.join() must return "*"');
+
+var object = {
+  valueOf: function() {
+    return "+"
+  },
+  toString: function() {
+    return {}
+  }
+};
+var x = new Array(object);
+assert.sameValue(x.join(), "+", 'x.join() must return "+"');
+
+try {
+  var object = {
+    valueOf: function() {
+      throw "error"
+    },
+    toString: function() {
+      return "*"
+    }
+  };
+  var x = new Array(object);
+  assert.sameValue(x.join(), "*", 'x.join() must return "*"');
+}
+catch (e) {
+  assert.notSameValue(e, "error", 'The value of e is not "error"');
+}
+
+var object = {
+  toString: function() {
+    return "*"
+  }
+};
+var x = new Array(object);
+assert.sameValue(x.join(), "*", 'x.join() must return "*"');
+
+var object = {
+  valueOf: function() {
+    return {}
+  },
+  toString: function() {
+    return "*"
+  }
+}
+var x = new Array(object);
+assert.sameValue(x.join(), "*", 'x.join() must return "*"');
+
+try {
+  var object = {
+    valueOf: function() {
+      return "+"
+    },
+    toString: function() {
+      throw "error"
+    }
+  };
+  var x = new Array(object);
+  x.join();
+  throw new Test262Error('#7.1: var object = {valueOf: function() {return "+"}, toString: function() {throw "error"}} var x = new Array(object); x.join() throw "error". Actual: ' + (x.join()));
+}
+catch (e) {
+  assert.sameValue(e, "error", 'The value of e is expected to be "error"');
+}
+
+try {
+  var object = {
+    valueOf: function() {
+      return {}
+    },
+    toString: function() {
+      return {}
+    }
+  };
+  var x = new Array(object);
+  x.join();
+  throw new Test262Error('#8.1: var object = {valueOf: function() {return {}}, toString: function() {return {}}} var x = new Array(object); x.join() throw TypeError. Actual: ' + (x.join()));
+}
+catch (e) {
+  assert.sameValue(
+    e instanceof TypeError,
+    true,
+    'The result of evaluating (e instanceof TypeError) is expected to be true'
+  );
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/join/S15.4.4.5_A4_T3.js b/js/src/tests/test262/built-ins/Array/prototype/join/S15.4.4.5_A4_T3.js
new file mode 100644
index 0000000000..c199dd6210
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/join/S15.4.4.5_A4_T3.js
@@ -0,0 +1,25 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: Check ToLength(length) for non Array objects
+esid: sec-array.prototype.join
+description: length = -4294967294
+---*/
+
+var obj = {};
+obj.join = Array.prototype.join;
+obj[0] = "x";
+obj[1] = "y";
+obj[2] = "z";
+obj.length = -4294967294;
+
+if (obj.join("") !== "") {
+  throw new Test262Error('#1: var obj = {}; obj.join = Array.prototype.join; obj[0] = "x"; obj[1] = "y"; obj[2] = "z"; obj.length = -4294967294; obj.join("") === "". Actual: ' + (obj.join("")));
+}
+
+if (obj.length !== -4294967294) {
+  throw new Test262Error('#2: var obj = {}; obj.join = Array.prototype.join; obj[0] = "x"; obj[1] = "y"; obj[2] = "z"; obj.length = -4294967294; obj.join(""); obj.length === -4294967294. Actual: ' + (obj.length));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/join/S15.4.4.5_A5_T1.js b/js/src/tests/test262/built-ins/Array/prototype/join/S15.4.4.5_A5_T1.js
new file mode 100644
index 0000000000..781cb601d2
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/join/S15.4.4.5_A5_T1.js
@@ -0,0 +1,29 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: "[[Get]] from not an inherited property"
+esid: sec-array.prototype.join
+description: >
+    [[Prototype]] of Array instance is Array.prototype, [[Prototype]
+    of Array.prototype is Object.prototype
+---*/
+
+Array.prototype[1] = 1;
+var x = [0];
+x.length = 2;
+if (x.join() !== "0,1") {
+  throw new Test262Error('#1: Array.prototype[1] = 1; x = [0]; x.length = 2; x.join() === "0,1". Actual: ' + (x.join()));
+}
+
+Object.prototype[1] = 1;
+Object.prototype.length = 2;
+Object.prototype.join = Array.prototype.join;
+x = {
+  0: 0
+};
+if (x.join() !== "0,1") {
+  throw new Test262Error('#2: Object.prototype[1] = 1; Object.prototype.length = 2; Object.prototype.join = Array.prototype.join; x = {0:0}; x.join() === "0,1". Actual: ' + (x.join()));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/join/S15.4.4.5_A6.6.js b/js/src/tests/test262/built-ins/Array/prototype/join/S15.4.4.5_A6.6.js
new file mode 100644
index 0000000000..1772e04386
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/join/S15.4.4.5_A6.6.js
@@ -0,0 +1,14 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: The join property of Array has not prototype property
+esid: sec-array.prototype.join
+description: Checking Array.prototype.join.prototype
+---*/
+
+if (Array.prototype.join.prototype !== undefined) {
+  throw new Test262Error('#1: Array.prototype.join.prototype === undefined. Actual: ' + (Array.prototype.join.prototype));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/join/browser.js b/js/src/tests/test262/built-ins/Array/prototype/join/browser.js
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/js/src/tests/test262/built-ins/Array/prototype/join/call-with-boolean.js b/js/src/tests/test262/built-ins/Array/prototype/join/call-with-boolean.js
new file mode 100644
index 0000000000..3bbdbfd037
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/join/call-with-boolean.js
@@ -0,0 +1,12 @@
+// Copyright (c) 2020 Rick Waldron.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.join
+description: Array.prototype.join applied to boolean primitive
+---*/
+
+assert.sameValue(Array.prototype.join.call(true), "", 'Array.prototype.join.call(true) must return ""');
+assert.sameValue(Array.prototype.join.call(false), "", 'Array.prototype.join.call(false) must return ""');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/join/length.js b/js/src/tests/test262/built-ins/Array/prototype/join/length.js
new file mode 100644
index 0000000000..bdef13a59f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/join/length.js
@@ -0,0 +1,30 @@
+// Copyright (C) 2017 Leo Balter. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.join
+description: >
+  The "length" property of Array.prototype.join
+info: |
+  17 ECMAScript Standard Built-in Objects
+
+  Every built-in function object, including constructors, has a length property
+  whose value is an integer. Unless otherwise specified, this value is equal to
+  the largest number of named arguments shown in the subclause headings for the
+  function description. Optional parameters (which are indicated with brackets:
+  [ ]) or rest parameters (which are shown using the form «...name») are not
+  included in the default argument count.
+
+  Unless otherwise specified, the length property of a built-in function object
+  has the attributes { [[Writable]]: false, [[Enumerable]]: false,
+    [[Configurable]]: true }.
+includes: [propertyHelper.js]
+---*/
+
+assert.sameValue(Array.prototype.join.length, 1);
+
+verifyNotEnumerable(Array.prototype.join, 'length');
+verifyNotWritable(Array.prototype.join, 'length');
+verifyConfigurable(Array.prototype.join, 'length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/join/name.js b/js/src/tests/test262/built-ins/Array/prototype/join/name.js
new file mode 100644
index 0000000000..3af90e214e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/join/name.js
@@ -0,0 +1,28 @@
+// Copyright (C) 2015 André Bargull. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.join
+description: >
+  Array.prototype.join.name is "join".
+info: |
+  Array.prototype.join (separator)
+
+  17 ECMAScript Standard Built-in Objects:
+    Every built-in Function object, including constructors, that is not
+    identified as an anonymous function has a name property whose value
+    is a String.
+
+    Unless otherwise specified, the name property of a built-in Function
+    object, if it exists, has the attributes { [[Writable]]: false,
+    [[Enumerable]]: false, [[Configurable]]: true }.
+includes: [propertyHelper.js]
+---*/
+
+assert.sameValue(Array.prototype.join.name, "join");
+
+verifyNotEnumerable(Array.prototype.join, "name");
+verifyNotWritable(Array.prototype.join, "name");
+verifyConfigurable(Array.prototype.join, "name");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/join/not-a-constructor.js b/js/src/tests/test262/built-ins/Array/prototype/join/not-a-constructor.js
new file mode 100644
index 0000000000..e92cd56335
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/join/not-a-constructor.js
@@ -0,0 +1,31 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Array.prototype.join does not implement [[Construct]], is not new-able
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+
+  sec-evaluatenew
+
+  ...
+  7. If IsConstructor(constructor) is false, throw a TypeError exception.
+  ...
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(isConstructor(Array.prototype.join), false, 'isConstructor(Array.prototype.join) must return false');
+
+assert.throws(TypeError, () => {
+  new Array.prototype.join();
+}, '`new Array.prototype.join()` throws TypeError');
+
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/join/prop-desc.js b/js/src/tests/test262/built-ins/Array/prototype/join/prop-desc.js
new file mode 100644
index 0000000000..f0948561ee
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/join/prop-desc.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2017 Leo Balter. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.join
+description: >
+  "join" property of Array.prototype
+info: |
+  17 ECMAScript Standard Built-in Objects
+  
+  Every other data property described in clauses 18 through 26 and in Annex B.2
+  has the attributes { [[Writable]]: true, [[Enumerable]]: false,
+    [[Configurable]]: true } unless otherwise specified.
+includes: [propertyHelper.js]
+---*/
+
+assert.sameValue(typeof Array.prototype.join, 'function', 'typeof');
+
+verifyNotEnumerable(Array.prototype, "join");
+verifyWritable(Array.prototype, "join");
+verifyConfigurable(Array.prototype, "join");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/join/shell.js b/js/src/tests/test262/built-ins/Array/prototype/join/shell.js
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/js/src/tests/test262/built-ins/Array/prototype/keys/browser.js b/js/src/tests/test262/built-ins/Array/prototype/keys/browser.js
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/js/src/tests/test262/built-ins/Array/prototype/keys/iteration-mutable.js b/js/src/tests/test262/built-ins/Array/prototype/keys/iteration-mutable.js
new file mode 100644
index 0000000000..e1eee7e83c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/keys/iteration-mutable.js
@@ -0,0 +1,41 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.keys
+description: >
+  New items in the array are accessible via iteration until iterator is "done".
+info: |
+  When an item is added to the array after the iterator is created but
+  before the iterator is "done" (as defined by 22.1.5.2.1), the new item's
+  key should be accessible via iteration. When an item is added to the
+  array after the iterator is "done", the new item's key should not be
+  accessible via iteration.
+---*/
+
+var array = [];
+var iterator = array.keys();
+var result;
+
+array.push('a');
+
+result = iterator.next();
+assert.sameValue(result.done, false, 'First result `done` flag');
+assert.sameValue(result.value, 0, 'First result `value`');
+
+result = iterator.next();
+assert.sameValue(result.done, true, 'Exhausted result `done` flag');
+assert.sameValue(result.value, undefined, 'Exhausted result `value`');
+
+array.push('b');
+
+result = iterator.next();
+assert.sameValue(
+  result.done, true,
+  'Exhausted result `done` flag (after push)'
+);
+assert.sameValue(
+  result.value, undefined,
+  'Exhausted result `value` (after push)'
+);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/keys/iteration.js b/js/src/tests/test262/built-ins/Array/prototype/keys/iteration.js
new file mode 100644
index 0000000000..32e0530717
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/keys/iteration.js
@@ -0,0 +1,35 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.keys
+description: >
+  The return is a valid iterator with the array's numeric properties.
+info: |
+  22.1.3.13 Array.prototype.keys ( )
+
+  1. Let O be ToObject(this value).
+  2. ReturnIfAbrupt(O).
+  3. Return CreateArrayIterator(O, "key").
+---*/
+
+var array = ['a', 'b', 'c'];
+var iterator = array.keys();
+var result;
+
+result = iterator.next();
+assert.sameValue(result.value, 0, 'First result `value`');
+assert.sameValue(result.done, false, 'First result `done` flag');
+
+result = iterator.next();
+assert.sameValue(result.value, 1, 'Second result `value`');
+assert.sameValue(result.done, false, 'Second result `done` flag');
+
+result = iterator.next();
+assert.sameValue(result.value, 2, 'Third result `value`');
+assert.sameValue(result.done, false, 'Third result `done` flag');
+
+result = iterator.next();
+assert.sameValue(result.value, undefined, 'Exhausted result `value`');
+assert.sameValue(result.done, true, 'Exhausted result `done` flag');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/keys/length.js b/js/src/tests/test262/built-ins/Array/prototype/keys/length.js
new file mode 100644
index 0000000000..6d997e5972
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/keys/length.js
@@ -0,0 +1,24 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.keys
+description: >
+  Array.prototype.keys.length value and descriptor.
+info: |
+  22.1.3.13 Array.prototype.keys ( )
+
+  17 ECMAScript Standard Built-in Objects
+
+includes: [propertyHelper.js]
+---*/
+
+assert.sameValue(
+  Array.prototype.keys.length, 0,
+  'The value of `Array.prototype.keys.length` is `0`'
+);
+
+verifyNotEnumerable(Array.prototype.keys, 'length');
+verifyNotWritable(Array.prototype.keys, 'length');
+verifyConfigurable(Array.prototype.keys, 'length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/keys/name.js b/js/src/tests/test262/built-ins/Array/prototype/keys/name.js
new file mode 100644
index 0000000000..11ea5c508f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/keys/name.js
@@ -0,0 +1,24 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.keys
+description: >
+  Array.prototype.keys.name value and descriptor.
+info: |
+  22.1.3.13 Array.prototype.keys ( )
+
+  17 ECMAScript Standard Built-in Objects
+
+includes: [propertyHelper.js]
+---*/
+
+assert.sameValue(
+  Array.prototype.keys.name, 'keys',
+  'The value of `Array.prototype.keys.name` is `"keys"`'
+);
+
+verifyNotEnumerable(Array.prototype.keys, 'name');
+verifyNotWritable(Array.prototype.keys, 'name');
+verifyConfigurable(Array.prototype.keys, 'name');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/keys/not-a-constructor.js b/js/src/tests/test262/built-ins/Array/prototype/keys/not-a-constructor.js
new file mode 100644
index 0000000000..8d0b5db966
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/keys/not-a-constructor.js
@@ -0,0 +1,31 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Array.prototype.keys does not implement [[Construct]], is not new-able
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+
+  sec-evaluatenew
+
+  ...
+  7. If IsConstructor(constructor) is false, throw a TypeError exception.
+  ...
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(isConstructor(Array.prototype.keys), false, 'isConstructor(Array.prototype.keys) must return false');
+
+assert.throws(TypeError, () => {
+  new Array.prototype.keys();
+}, '`new Array.prototype.keys()` throws TypeError');
+
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/keys/prop-desc.js b/js/src/tests/test262/built-ins/Array/prototype/keys/prop-desc.js
new file mode 100644
index 0000000000..6230d94566
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/keys/prop-desc.js
@@ -0,0 +1,24 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.keys
+description: >
+  Property type and descriptor.
+info: |
+  22.1.3.13 Array.prototype.keys ( )
+
+  17 ECMAScript Standard Built-in Objects
+includes: [propertyHelper.js]
+---*/
+
+assert.sameValue(
+  typeof Array.prototype.keys,
+  'function',
+  '`typeof Array.prototype.keys` is `function`'
+);
+
+verifyNotEnumerable(Array.prototype, 'keys');
+verifyWritable(Array.prototype, 'keys');
+verifyConfigurable(Array.prototype, 'keys');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/keys/return-abrupt-from-this.js b/js/src/tests/test262/built-ins/Array/prototype/keys/return-abrupt-from-this.js
new file mode 100644
index 0000000000..0885de5532
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/keys/return-abrupt-from-this.js
@@ -0,0 +1,22 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.keys
+description: >
+  Return abrupt from ToObject(this value).
+info: |
+  22.1.3.13 Array.prototype.keys ( )
+
+  1. Let O be ToObject(this value).
+  2. ReturnIfAbrupt(O).
+---*/
+
+assert.throws(TypeError, function() {
+  Array.prototype.keys.call(undefined);
+});
+
+assert.throws(TypeError, function() {
+  Array.prototype.keys.call(null);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/keys/returns-iterator-from-object.js b/js/src/tests/test262/built-ins/Array/prototype/keys/returns-iterator-from-object.js
new file mode 100644
index 0000000000..d48cc27f94
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/keys/returns-iterator-from-object.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.keys
+description: >
+  Creates an iterator from a custom object.
+info: |
+  22.1.3.13 Array.prototype.keys ( )
+
+  1. Let O be ToObject(this value).
+  2. ReturnIfAbrupt(O).
+  3. Return CreateArrayIterator(O, "key").
+features: [Symbol.iterator]
+---*/
+
+var obj = {
+  length: 2
+};
+var iter = Array.prototype.keys.call(obj);
+var ArrayIteratorProto = Object.getPrototypeOf([][Symbol.iterator]());
+
+assert.sameValue(
+  Object.getPrototypeOf(iter), ArrayIteratorProto,
+  'The prototype of [].keys() is %ArrayIteratorPrototype%'
+);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/keys/returns-iterator.js b/js/src/tests/test262/built-ins/Array/prototype/keys/returns-iterator.js
new file mode 100644
index 0000000000..56ba5b5af5
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/keys/returns-iterator.js
@@ -0,0 +1,32 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.keys
+description: >
+  The method should return an Iterator instance.
+info: |
+  22.1.3.13 Array.prototype.keys ( )
+
+  1. Let O be ToObject(this value).
+  2. ReturnIfAbrupt(O).
+  3. Return CreateArrayIterator(O, "key").
+
+  22.1.5.1 CreateArrayIterator Abstract Operation
+
+  ...
+  2. Let iterator be ObjectCreate(%ArrayIteratorPrototype%, «‍[[IteratedObject]],
+  [[ArrayIteratorNextIndex]], [[ArrayIterationKind]]»).
+  ...
+  6. Return iterator.
+features: [Symbol.iterator]
+---*/
+
+var ArrayIteratorProto = Object.getPrototypeOf([][Symbol.iterator]());
+var iter = [].keys();
+
+assert.sameValue(
+  Object.getPrototypeOf(iter), ArrayIteratorProto,
+  'The prototype of [].keys() is %ArrayIteratorPrototype%'
+);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/keys/shell.js b/js/src/tests/test262/built-ins/Array/prototype/keys/shell.js
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-1-1.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-1-1.js
new file mode 100644
index 0000000000..f4385f56f5
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-1-1.js
@@ -0,0 +1,14 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: Array.prototype.lastIndexOf applied to undefined throws a TypeError
+---*/
+
+
+assert.throws(TypeError, function() {
+  Array.prototype.lastIndexOf.call(undefined);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-1-10.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-1-10.js
new file mode 100644
index 0000000000..9d791295f8
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-1-10.js
@@ -0,0 +1,14 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: Array.prototype.lastIndexOf applied to the Math object
+---*/
+
+Math.length = 2;
+Math[1] = 100;
+
+assert.sameValue(Array.prototype.lastIndexOf.call(Math, 100), 1, 'Array.prototype.lastIndexOf.call(Math, 100)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-1-11.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-1-11.js
new file mode 100644
index 0000000000..ba3a3046b4
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-1-11.js
@@ -0,0 +1,15 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: Array.prototype.lastIndexOf applied to Date object
+---*/
+
+var obj = new Date();
+obj.length = 2;
+obj[1] = true;
+
+assert.sameValue(Array.prototype.lastIndexOf.call(obj, true), 1, 'Array.prototype.lastIndexOf.call(obj, true)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-1-12.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-1-12.js
new file mode 100644
index 0000000000..ad8fdee8d0
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-1-12.js
@@ -0,0 +1,15 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: Array.prototype.lastIndexOf applied to RegExp object
+---*/
+
+var obj = new RegExp("afdasf");
+obj.length = 100;
+obj[1] = "afdasf";
+
+assert.sameValue(Array.prototype.lastIndexOf.call(obj, "afdasf"), 1, 'Array.prototype.lastIndexOf.call(obj, "afdasf")');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-1-13.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-1-13.js
new file mode 100644
index 0000000000..0c1b6d06ca
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-1-13.js
@@ -0,0 +1,16 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: Array.prototype.lastIndexOf applied to the JSON object
+---*/
+
+var targetObj = {};
+
+JSON[3] = targetObj;
+JSON.length = 5;
+
+assert.sameValue(Array.prototype.lastIndexOf.call(JSON, targetObj), 3, 'Array.prototype.lastIndexOf.call(JSON, targetObj)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-1-14.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-1-14.js
new file mode 100644
index 0000000000..c4ff1e4c1d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-1-14.js
@@ -0,0 +1,15 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: Array.prototype.lastIndexOf applied to Error object
+---*/
+
+var obj = new SyntaxError();
+obj.length = 2;
+obj[1] = Infinity;
+
+assert.sameValue(Array.prototype.lastIndexOf.call(obj, Infinity), 1, 'Array.prototype.lastIndexOf.call(obj, Infinity)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-1-15.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-1-15.js
new file mode 100644
index 0000000000..2fd89b80d1
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-1-15.js
@@ -0,0 +1,15 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: Array.prototype.lastIndexOf applied to the Arguments object
+---*/
+
+var obj = (function fun() {
+  return arguments;
+}(1, 2, 3));
+
+assert.sameValue(Array.prototype.lastIndexOf.call(obj, 2), 1, 'Array.prototype.lastIndexOf.call(obj, 2)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-1-2.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-1-2.js
new file mode 100644
index 0000000000..ab7a152285
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-1-2.js
@@ -0,0 +1,14 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: Array.prototype.lastIndexOf applied to null throws a TypeError
+---*/
+
+
+assert.throws(TypeError, function() {
+  Array.prototype.lastIndexOf.call(null);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-1-3.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-1-3.js
new file mode 100644
index 0000000000..d662edf0e0
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-1-3.js
@@ -0,0 +1,14 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: Array.prototype.lastIndexOf applied to boolean primitive
+---*/
+
+Boolean.prototype[1] = true;
+Boolean.prototype.length = 2;
+
+assert.sameValue(Array.prototype.lastIndexOf.call(true, true), 1, 'Array.prototype.lastIndexOf.call(true, true)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-1-4.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-1-4.js
new file mode 100644
index 0000000000..7f11852e14
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-1-4.js
@@ -0,0 +1,15 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: Array.prototype.lastIndexOf applied to Boolean object
+---*/
+
+var obj = new Boolean(false);
+obj.length = 2;
+obj[1] = true;
+
+assert.sameValue(Array.prototype.lastIndexOf.call(obj, true), 1, 'Array.prototype.lastIndexOf.call(obj, true)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-1-5.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-1-5.js
new file mode 100644
index 0000000000..d2432b9b22
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-1-5.js
@@ -0,0 +1,14 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: Array.prototype.lastIndexOf applied to number primitive
+---*/
+
+Number.prototype[1] = isNaN;
+Number.prototype.length = 2;
+
+assert.sameValue(Array.prototype.lastIndexOf.call(5, isNaN), 1, 'Array.prototype.lastIndexOf.call(5, isNaN)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-1-6.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-1-6.js
new file mode 100644
index 0000000000..6cd70edfd6
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-1-6.js
@@ -0,0 +1,15 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: Array.prototype.lastIndexOf applied to Number object
+---*/
+
+var obj = new Number(-3);
+obj.length = 2;
+obj[1] = true;
+
+assert.sameValue(Array.prototype.lastIndexOf.call(obj, true), 1, 'Array.prototype.lastIndexOf.call(obj, true)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-1-7.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-1-7.js
new file mode 100644
index 0000000000..5fa4fa5da9
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-1-7.js
@@ -0,0 +1,11 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: Array.prototype.lastIndexOf applied to string primitive
+---*/
+
+assert.sameValue(Array.prototype.lastIndexOf.call("abc", "c"), 2, 'Array.prototype.lastIndexOf.call("abc", "c")');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-1-8.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-1-8.js
new file mode 100644
index 0000000000..8a94cd4945
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-1-8.js
@@ -0,0 +1,13 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: Array.prototype.lastIndexOf applied to String object
+---*/
+
+var obj = new String("undefined");
+
+assert.sameValue(Array.prototype.lastIndexOf.call(obj, "f"), 4, 'Array.prototype.lastIndexOf.call(obj, "f")');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-1-9.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-1-9.js
new file mode 100644
index 0000000000..d01b502e5d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-1-9.js
@@ -0,0 +1,16 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: Array.prototype.lastIndexOf applied to Function object
+---*/
+
+var obj = function(a, b) {
+  return a + b;
+};
+obj[1] = true;
+
+assert.sameValue(Array.prototype.lastIndexOf.call(obj, true), 1, 'Array.prototype.lastIndexOf.call(obj, true)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-2-1.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-2-1.js
new file mode 100644
index 0000000000..1b26440d04
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-2-1.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf - 'length' is own data property on an
+    Array-like object
+---*/
+
+var obj = {
+  1: null,
+  2: undefined,
+  length: 2
+};
+
+assert.sameValue(Array.prototype.lastIndexOf.call(obj, null), 1, 'Array.prototype.lastIndexOf.call(obj, null)');
+assert.sameValue(Array.prototype.lastIndexOf.call(obj, undefined), -1, 'Array.prototype.lastIndexOf.call(obj, undefined)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-2-10.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-2-10.js
new file mode 100644
index 0000000000..672f273669
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-2-10.js
@@ -0,0 +1,29 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf - 'length' is inherited accessor
+    property on an Array-like object
+---*/
+
+var proto = {};
+Object.defineProperty(proto, "length", {
+  get: function() {
+    return 2;
+  },
+  configurable: true
+});
+
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+child[1] = 1;
+child[2] = 2;
+
+assert.sameValue(Array.prototype.lastIndexOf.call(child, 1), 1, 'Array.prototype.lastIndexOf.call(child, 1)');
+assert.sameValue(Array.prototype.lastIndexOf.call(child, 2), -1, 'Array.prototype.lastIndexOf.call(child, 2)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-2-11.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-2-11.js
new file mode 100644
index 0000000000..e5008d2ffb
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-2-11.js
@@ -0,0 +1,21 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf - 'length' is own accessor property
+    without a get function on an Array-like object
+---*/
+
+var obj = {
+  0: 1
+};
+Object.defineProperty(obj, "length", {
+  set: function() {},
+  configurable: true
+});
+
+assert.sameValue(Array.prototype.lastIndexOf.call(obj, 1), -1, 'Array.prototype.lastIndexOf.call(obj, 1)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-2-12.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-2-12.js
new file mode 100644
index 0000000000..a9bbce058e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-2-12.js
@@ -0,0 +1,29 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf - 'length' is own accessor property
+    without a get function that overrides an inherited accessor
+    property on an Array-like object
+---*/
+
+Object.defineProperty(Object.prototype, "length", {
+  get: function() {
+    return 20;
+  },
+  configurable: true
+});
+
+var obj = {
+  1: 1
+};
+Object.defineProperty(obj, "length", {
+  set: function() {},
+  configurable: true
+});
+
+assert.sameValue(Array.prototype.lastIndexOf.call(obj, 1), -1, 'Array.prototype.lastIndexOf.call(obj, 1)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-2-13.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-2-13.js
new file mode 100644
index 0000000000..dcecfb9241
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-2-13.js
@@ -0,0 +1,25 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf - 'length' is inherited accessor
+    property without a get function on an Array-like object
+---*/
+
+var proto = {};
+Object.defineProperty(proto, "length", {
+  set: function() {},
+  configurable: true
+});
+
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+child[0] = true;
+
+assert.sameValue(Array.prototype.lastIndexOf.call(child, true), -1, 'Array.prototype.lastIndexOf.call(child, true)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-2-14.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-2-14.js
new file mode 100644
index 0000000000..58062484b4
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-2-14.js
@@ -0,0 +1,18 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf - 'length' is undefined property on an
+    Array-like object
+---*/
+
+var obj = {
+  0: null,
+  1: undefined
+};
+
+assert.sameValue(Array.prototype.lastIndexOf.call(obj, null), -1, 'Array.prototype.lastIndexOf.call(obj, null)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-2-17.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-2-17.js
new file mode 100644
index 0000000000..5e29cd9be5
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-2-17.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf applied to Arguments object which
+    implements its own property get method
+---*/
+
+var targetObj = function() {};
+var func = function(a, b) {
+  arguments[2] = function() {};
+  return Array.prototype.lastIndexOf.call(arguments, targetObj) === 1 &&
+    Array.prototype.lastIndexOf.call(arguments, arguments[2]) === -1;
+};
+
+assert(func(0, targetObj), 'func(0, targetObj) !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-2-18.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-2-18.js
new file mode 100644
index 0000000000..90c8ee9d56
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-2-18.js
@@ -0,0 +1,18 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf applied to String object which
+    implements its own property get method
+---*/
+
+var str = new String("012");
+
+String.prototype[3] = "3";
+
+assert.sameValue(Array.prototype.lastIndexOf.call(str, "2"), 2, 'Array.prototype.lastIndexOf.call(str, "2")');
+assert.sameValue(Array.prototype.lastIndexOf.call(str, "3"), -1, 'Array.prototype.lastIndexOf.call(str, "3")');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-2-19.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-2-19.js
new file mode 100644
index 0000000000..6278205ca0
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-2-19.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf applied to String object which
+    implements its own property get method
+---*/
+
+var obj = function(a, b) {
+  return a + b;
+};
+obj[1] = "b";
+obj[2] = "c";
+
+assert.sameValue(Array.prototype.lastIndexOf.call(obj, obj[1]), 1, 'Array.prototype.lastIndexOf.call(obj, obj[1])');
+assert.sameValue(Array.prototype.lastIndexOf.call(obj, obj[2]), -1, 'Array.prototype.lastIndexOf.call(obj, obj[2])');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-2-2.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-2-2.js
new file mode 100644
index 0000000000..53f995706d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-2-2.js
@@ -0,0 +1,18 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf - 'length' is own data property on an
+    Array
+---*/
+
+var targetObj = {};
+
+Array.prototype[2] = targetObj;
+
+assert.sameValue([0, targetObj].lastIndexOf(targetObj), 1, '[0, targetObj].lastIndexOf(targetObj)');
+assert.sameValue([0, 1].lastIndexOf(targetObj), -1, '[0, 1].lastIndexOf(targetObj)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-2-3.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-2-3.js
new file mode 100644
index 0000000000..b280836efe
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-2-3.js
@@ -0,0 +1,24 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf - 'length' is own data property that
+    overrides an inherited data property on an Array-like object
+---*/
+
+var proto = {
+  length: 0
+};
+
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+child.length = 2;
+child[1] = child;
+
+assert.sameValue(Array.prototype.lastIndexOf.call(child, child), 1, 'Array.prototype.lastIndexOf.call(child, child)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-2-4.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-2-4.js
new file mode 100644
index 0000000000..7289b10cef
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-2-4.js
@@ -0,0 +1,19 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf when 'length' is own data property
+    that overrides an inherited data property on an Array
+---*/
+
+var targetObj = {};
+var arrProtoLen;
+
+arrProtoLen = Array.prototype.length;
+Array.prototype.length = 0;
+
+assert.sameValue([0, targetObj, 2].lastIndexOf(targetObj), 1, '[0, targetObj, 2].lastIndexOf(targetObj)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-2-5.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-2-5.js
new file mode 100644
index 0000000000..342a9b7b38
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-2-5.js
@@ -0,0 +1,32 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf - 'length' is own data property that
+    overrides an inherited accessor property on an Array-like object
+---*/
+
+var proto = {};
+Object.defineProperty(proto, "length", {
+  get: function() {
+    return 0;
+  },
+  configurable: true
+});
+
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+
+Object.defineProperty(child, "length", {
+  value: 2,
+  configurable: true
+});
+child[1] = null;
+
+assert.sameValue(Array.prototype.lastIndexOf.call(child, null), 1, 'Array.prototype.lastIndexOf.call(child, null)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-2-6.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-2-6.js
new file mode 100644
index 0000000000..c667d16d54
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-2-6.js
@@ -0,0 +1,25 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf - 'length' is an inherited data
+    property on an Array-like object
+---*/
+
+var proto = {
+  length: 2
+};
+
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+child[1] = "x";
+child[2] = "y";
+
+assert.sameValue(Array.prototype.lastIndexOf.call(child, "x"), 1, 'Array.prototype.lastIndexOf.call(child, "x")');
+assert.sameValue(Array.prototype.lastIndexOf.call(child, "y"), -1, 'Array.prototype.lastIndexOf.call(child, "y")');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-2-7.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-2-7.js
new file mode 100644
index 0000000000..c288c87c01
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-2-7.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf - 'length' is own accessor property on
+    an Array-like object
+---*/
+
+var obj = {
+  1: true,
+  2: false
+};
+
+Object.defineProperty(obj, "length", {
+  get: function() {
+    return 2;
+  },
+  configurable: true
+});
+
+assert.sameValue(Array.prototype.lastIndexOf.call(obj, true), 1, 'Array.prototype.lastIndexOf.call(obj, true)');
+assert.sameValue(Array.prototype.lastIndexOf.call(obj, false), -1, 'Array.prototype.lastIndexOf.call(obj, false)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-2-8.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-2-8.js
new file mode 100644
index 0000000000..6bc99e9075
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-2-8.js
@@ -0,0 +1,30 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf - 'length' is own accessor property
+    that overrides an inherited data property on an Array-like object
+---*/
+
+var proto = {
+  length: 0
+};
+
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+child[1] = eval;
+
+Object.defineProperty(child, "length", {
+  get: function() {
+    return 2;
+  },
+  configurable: true
+});
+
+assert.sameValue(Array.prototype.lastIndexOf.call(child, eval), 1, 'Array.prototype.lastIndexOf.call(child, eval)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-2-9.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-2-9.js
new file mode 100644
index 0000000000..eeaf5fea4e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-2-9.js
@@ -0,0 +1,35 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf - 'length' is own accessor property
+    that overrides an inherited accessor property on an Array-like
+    object
+---*/
+
+var proto = {};
+Object.defineProperty(proto, "length", {
+  get: function() {
+    return 0;
+  },
+  configurable: true
+});
+
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+child[1] = true;
+
+Object.defineProperty(child, "length", {
+  get: function() {
+    return 2;
+  },
+  configurable: true
+});
+
+assert.sameValue(Array.prototype.lastIndexOf.call(child, true), 1, 'Array.prototype.lastIndexOf.call(child, true)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-3-1.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-3-1.js
new file mode 100644
index 0000000000..f86e3f5311
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-3-1.js
@@ -0,0 +1,17 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: Array.prototype.lastIndexOf - value of 'length' is undefined
+---*/
+
+var obj = {
+  0: 1,
+  1: 1,
+  length: undefined
+};
+
+assert.sameValue(Array.prototype.lastIndexOf.call(obj, 1), -1, 'Array.prototype.lastIndexOf.call(obj, 1)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-3-10.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-3-10.js
new file mode 100644
index 0000000000..a5c9bddfda
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-3-10.js
@@ -0,0 +1,18 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf - value of 'length' is a number (value
+    is NaN)
+---*/
+
+var obj = {
+  0: 0,
+  length: NaN
+};
+
+assert.sameValue(Array.prototype.lastIndexOf.call(obj, 0), -1, 'Array.prototype.lastIndexOf.call(obj, 0)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-3-11.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-3-11.js
new file mode 100644
index 0000000000..c86e83fedb
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-3-11.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf - value of 'length' is a string
+    containing positive number
+---*/
+
+var obj = {
+  1: true,
+  2: false,
+  length: "2"
+};
+
+assert.sameValue(Array.prototype.lastIndexOf.call(obj, true), 1, 'Array.prototype.lastIndexOf.call(obj, true)');
+assert.sameValue(Array.prototype.lastIndexOf.call(obj, false), -1, 'Array.prototype.lastIndexOf.call(obj, false)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-3-12.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-3-12.js
new file mode 100644
index 0000000000..354a3df9a4
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-3-12.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf - value of 'length' is a string
+    containing negative number
+---*/
+
+var obj = {
+  1: null,
+  2: undefined,
+  length: "-4294967294"
+};
+
+assert.sameValue(Array.prototype.lastIndexOf.call(obj, null), -1, 'Array.prototype.lastIndexOf.call(obj, null)');
+assert.sameValue(Array.prototype.lastIndexOf.call(obj, undefined), -1, 'Array.prototype.lastIndexOf.call(obj, undefined)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-3-13.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-3-13.js
new file mode 100644
index 0000000000..e5e15da4a0
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-3-13.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf - value of 'length' is a string
+    containing a decimal number
+---*/
+
+var obj = {
+  4: 4,
+  5: 5,
+  length: "5.512345"
+};
+
+assert.sameValue(Array.prototype.lastIndexOf.call(obj, 4), 4, 'Array.prototype.lastIndexOf.call(obj, 4)');
+assert.sameValue(Array.prototype.lastIndexOf.call(obj, 5), -1, 'Array.prototype.lastIndexOf.call(obj, 5)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-3-14.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-3-14.js
new file mode 100644
index 0000000000..efae423b3d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-3-14.js
@@ -0,0 +1,19 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf - value of 'length' is a string
+    containing -Infinity
+---*/
+
+var objThree = {
+  0: true,
+  1: true,
+  length: "-Infinity"
+};
+
+assert.sameValue(Array.prototype.lastIndexOf.call(objThree, true), -1, 'Array.prototype.lastIndexOf.call(objThree, true)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-3-15.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-3-15.js
new file mode 100644
index 0000000000..ad686a0d7a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-3-15.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf - value of 'length' is a string
+    containing an exponential number
+---*/
+
+var obj = {
+  229: 229,
+  230: 2.3E2,
+  length: "2.3E2"
+};
+
+assert.sameValue(Array.prototype.lastIndexOf.call(obj, 229), 229, 'Array.prototype.lastIndexOf.call(obj, 229)');
+assert.sameValue(Array.prototype.lastIndexOf.call(obj, 2.3E2), -1, 'Array.prototype.lastIndexOf.call(obj, 2.3E2)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-3-16.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-3-16.js
new file mode 100644
index 0000000000..8a834a9473
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-3-16.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf - value of 'length' is a string which
+    is able to be converted into hex number
+---*/
+
+var obj = {
+  2573: 2573,
+  2574: 0x000A0E,
+  length: "0x000A0E"
+};
+
+assert.sameValue(Array.prototype.lastIndexOf.call(obj, 2573), 2573, 'Array.prototype.lastIndexOf.call(obj, 2573)');
+assert.sameValue(Array.prototype.lastIndexOf.call(obj, 0x000A0E), -1, 'Array.prototype.lastIndexOf.call(obj, 0x000A0E)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-3-17.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-3-17.js
new file mode 100644
index 0000000000..00f1012438
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-3-17.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf - value of 'length' is a string
+    containing a number with leading zeros
+---*/
+
+var obj = {
+  1: 1,
+  2: 2,
+  length: "0002.0"
+};
+
+assert.sameValue(Array.prototype.lastIndexOf.call(obj, 1), 1, 'Array.prototype.lastIndexOf.call(obj, 1)');
+assert.sameValue(Array.prototype.lastIndexOf.call(obj, 2), -1, 'Array.prototype.lastIndexOf.call(obj, 2)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-3-18.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-3-18.js
new file mode 100644
index 0000000000..913eef31ee
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-3-18.js
@@ -0,0 +1,19 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf - value of 'length' is a string that
+    can't convert to a number
+---*/
+
+var targetObj = new String("123abc123");
+var obj = {
+  0: targetObj,
+  length: "123abc123"
+};
+
+assert.sameValue(Array.prototype.lastIndexOf.call(obj, targetObj), -1, 'Array.prototype.lastIndexOf.call(obj, targetObj)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-3-19.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-3-19.js
new file mode 100644
index 0000000000..fd1ee62626
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-3-19.js
@@ -0,0 +1,32 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf - value of 'length' is an Object which
+    has an own toString method
+---*/
+
+// objects inherit the default valueOf() method from Object
+// that simply returns itself. Since the default valueOf() method
+// does not return a primitive value, ES next tries to convert the object
+// to a number by calling its toString() method and converting the
+// resulting string to a number.
+
+var targetObj = this;
+var obj = {
+  1: targetObj,
+  2: 2,
+
+  length: {
+    toString: function() {
+      return '2';
+    }
+  }
+};
+
+assert.sameValue(Array.prototype.lastIndexOf.call(obj, targetObj), 1, 'Array.prototype.lastIndexOf.call(obj, targetObj)');
+assert.sameValue(Array.prototype.lastIndexOf.call(obj, 2), -1, 'Array.prototype.lastIndexOf.call(obj, 2)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-3-2.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-3-2.js
new file mode 100644
index 0000000000..025ec6cb7a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-3-2.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf return -1 when value of 'length' is a
+    boolean (value is true)
+---*/
+
+var obj = {
+  0: 0,
+  1: 1,
+  length: true
+};
+
+assert.sameValue(Array.prototype.lastIndexOf.call(obj, 0), 0, 'Array.prototype.lastIndexOf.call(obj, 0)');
+assert.sameValue(Array.prototype.lastIndexOf.call(obj, 1), -1, 'Array.prototype.lastIndexOf.call(obj, 1)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-3-20.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-3-20.js
new file mode 100644
index 0000000000..880f103161
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-3-20.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf - value of 'length' is an Object which
+    has an own valueOf method
+---*/
+
+//valueOf method will be invoked first, since hint is Number
+var obj = {
+  1: true,
+  2: 2,
+
+  length: {
+    valueOf: function() {
+      return 2;
+    }
+  }
+};
+
+assert.sameValue(Array.prototype.lastIndexOf.call(obj, true), 1, 'Array.prototype.lastIndexOf.call(obj, true)');
+assert.sameValue(Array.prototype.lastIndexOf.call(obj, 2), -1, 'Array.prototype.lastIndexOf.call(obj, 2)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-3-21.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-3-21.js
new file mode 100644
index 0000000000..274586c363
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-3-21.js
@@ -0,0 +1,35 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf - 'length' is an object that has an
+    own valueOf method that returns an object and toString method that
+    returns a string
+---*/
+
+var toStringAccessed = false;
+var valueOfAccessed = false;
+
+var targetObj = this;
+var obj = {
+  1: targetObj,
+  length: {
+    toString: function() {
+      toStringAccessed = true;
+      return '3';
+    },
+
+    valueOf: function() {
+      valueOfAccessed = true;
+      return {};
+    }
+  }
+};
+
+assert.sameValue(Array.prototype.lastIndexOf.call(obj, targetObj), 1, 'Array.prototype.lastIndexOf.call(obj, targetObj)');
+assert(toStringAccessed, 'toStringAccessed !== true');
+assert(valueOfAccessed, 'valueOfAccessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-3-22.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-3-22.js
new file mode 100644
index 0000000000..69b038aec8
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-3-22.js
@@ -0,0 +1,37 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf throws TypeError exception when
+    'length' is an object with toString and valueOf methods that don�t
+    return primitive values
+---*/
+
+var toStringAccessed = false;
+var valueOfAccessed = false;
+
+var obj = {
+  1: true,
+  length: {
+    toString: function() {
+      toStringAccessed = true;
+      return {};
+    },
+
+    valueOf: function() {
+      valueOfAccessed = true;
+      return {};
+    }
+  }
+};
+
+assert.throws(TypeError, function() {
+  Array.prototype.lastIndexOf.call(obj, true);
+});
+
+assert(toStringAccessed, 'toStringAccessed');
+assert(valueOfAccessed, 'valueOfAccessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-3-23.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-3-23.js
new file mode 100644
index 0000000000..af48742adb
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-3-23.js
@@ -0,0 +1,40 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf uses inherited valueOf method when
+    'length' is an object with an own toString and an inherited
+    valueOf methods
+---*/
+
+var toStringAccessed = false;
+var valueOfAccessed = false;
+
+var proto = {
+  valueOf: function() {
+    valueOfAccessed = true;
+    return 2;
+  }
+};
+
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+child.toString = function() {
+  toStringAccessed = true;
+  return 2;
+};
+
+var obj = {
+  1: child,
+  length: child
+};
+
+assert.sameValue(Array.prototype.lastIndexOf.call(obj, child), 1, 'Array.prototype.lastIndexOf.call(obj, child)');
+assert(valueOfAccessed, 'valueOfAccessed !== true');
+assert.sameValue(toStringAccessed, false, 'toStringAccessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-3-24.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-3-24.js
new file mode 100644
index 0000000000..ed6f48f6f9
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-3-24.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf - value of 'length' is a positive
+    non-integer, ensure truncation occurs in the proper direction
+---*/
+
+var obj = {
+  122: true,
+  123: false,
+  length: 123.5
+};
+
+assert.sameValue(Array.prototype.lastIndexOf.call(obj, true), 122, 'Array.prototype.lastIndexOf.call(obj, true)');
+assert.sameValue(Array.prototype.lastIndexOf.call(obj, false), -1, 'Array.prototype.lastIndexOf.call(obj, false)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-3-25.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-3-25.js
new file mode 100644
index 0000000000..585ab0d4c7
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-3-25.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf - value of 'length' is a negative
+    non-integer
+---*/
+
+var obj = {
+  1: true,
+  2: false,
+  length: -4294967294.5
+};
+
+assert.sameValue(Array.prototype.lastIndexOf.call(obj, true), -1, 'Array.prototype.lastIndexOf.call(obj, true)');
+assert.sameValue(Array.prototype.lastIndexOf.call(obj, false), -1, 'Array.prototype.lastIndexOf.call(obj, false)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-3-28.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-3-28.js
new file mode 100644
index 0000000000..24ea851f8e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-3-28.js
@@ -0,0 +1,21 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf - value of 'length' is boundary value
+    (2^32)
+---*/
+
+var targetObj = {};
+var obj = {
+  0: targetObj,
+  4294967294: targetObj,
+  4294967295: targetObj,
+  length: 4294967296
+};
+
+assert.sameValue(Array.prototype.lastIndexOf.call(obj, targetObj), 4294967295, 'verify length is 4294967296 finally');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-3-3.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-3-3.js
new file mode 100644
index 0000000000..de944fac4f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-3-3.js
@@ -0,0 +1,18 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf - value of 'length' is a number (value
+    is 0)
+---*/
+
+var obj = {
+  0: "undefined",
+  length: 0
+};
+
+assert.sameValue(Array.prototype.lastIndexOf.call(obj, "undefined"), -1, 'Array.prototype.lastIndexOf.call(obj, "undefined")');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-3-4.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-3-4.js
new file mode 100644
index 0000000000..34a8125362
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-3-4.js
@@ -0,0 +1,18 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf - value of 'length' is a number (value
+    is -0)
+---*/
+
+var obj = {
+  0: true,
+  length: -0
+};
+
+assert.sameValue(Array.prototype.lastIndexOf.call(obj, true), -1, 'Array.prototype.lastIndexOf.call(obj, true)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-3-5.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-3-5.js
new file mode 100644
index 0000000000..6afbbdf2ed
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-3-5.js
@@ -0,0 +1,18 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf - value of 'length' is a number (value
+    is +0)
+---*/
+
+var obj = {
+  0: +0,
+  length: +0
+};
+
+assert.sameValue(Array.prototype.lastIndexOf.call(obj, +0), -1, 'Array.prototype.lastIndexOf.call(obj, +0)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-3-6.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-3-6.js
new file mode 100644
index 0000000000..8eda321c5c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-3-6.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf - value of 'length' is a number (value
+    is a positive number)
+---*/
+
+var obj = {
+  99: true,
+  100: 100,
+  length: 100
+};
+
+assert.sameValue(Array.prototype.lastIndexOf.call(obj, true), 99, 'Array.prototype.lastIndexOf.call(obj, true)');
+assert.sameValue(Array.prototype.lastIndexOf.call(obj, 100), -1, 'Array.prototype.lastIndexOf.call(obj, 100)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-3-7.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-3-7.js
new file mode 100644
index 0000000000..1927b2a448
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-3-7.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf - value of 'length' is a number (value
+    is a negative number)
+---*/
+
+var obj = {
+  4: -Infinity,
+  5: Infinity,
+  length: 5 - Math.pow(2, 32)
+};
+
+assert.sameValue(Array.prototype.lastIndexOf.call(obj, -Infinity), -1, 'Array.prototype.lastIndexOf.call(obj, -Infinity)');
+assert.sameValue(Array.prototype.lastIndexOf.call(obj, Infinity), -1, 'Array.prototype.lastIndexOf.call(obj, Infinity)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-3-9.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-3-9.js
new file mode 100644
index 0000000000..30c8ef8f83
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-3-9.js
@@ -0,0 +1,18 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf - value of 'length' is a number (value
+    is -Infinity)
+---*/
+
+var obj = {
+  0: 0,
+  length: -Infinity
+};
+
+assert.sameValue(Array.prototype.lastIndexOf.call(obj, 0), -1, 'Array.prototype.lastIndexOf.call(obj, 0)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-4-1.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-4-1.js
new file mode 100644
index 0000000000..bfb23e02ee
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-4-1.js
@@ -0,0 +1,15 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf returns -1 if 'length' is 0 (empty
+    array)
+---*/
+
+var i = [].lastIndexOf(42);
+
+assert.sameValue(i, -1, 'i');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-4-10.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-4-10.js
new file mode 100644
index 0000000000..5f8f630970
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-4-10.js
@@ -0,0 +1,18 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: Array.prototype.lastIndexOf - 'length' is a number of value -6e-1
+---*/
+
+var targetObj = [];
+var obj = {
+  0: targetObj,
+  100: targetObj,
+  length: -6e-1
+};
+
+assert.sameValue(Array.prototype.lastIndexOf.call(obj, targetObj), -1, 'Array.prototype.lastIndexOf.call(obj, targetObj)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-4-11.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-4-11.js
new file mode 100644
index 0000000000..c61d585b22
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-4-11.js
@@ -0,0 +1,18 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: Array.prototype.lastIndexOf - 'length' is an empty string
+---*/
+
+var targetObj = [];
+var obj = {
+  0: targetObj,
+  100: targetObj,
+  length: ""
+};
+
+assert.sameValue(Array.prototype.lastIndexOf.call(obj, targetObj), -1, 'Array.prototype.lastIndexOf.call(obj, targetObj)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-4-2.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-4-2.js
new file mode 100644
index 0000000000..4d0ede9e0c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-4-2.js
@@ -0,0 +1,18 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf returns -1 if 'length' is 0 ( length
+    overridden to null (type conversion))
+---*/
+
+var i = Array.prototype.lastIndexOf.call({
+  length: null
+}, 1);
+
+
+assert.sameValue(i, -1, 'i');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-4-3.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-4-3.js
new file mode 100644
index 0000000000..baa7664f32
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-4-3.js
@@ -0,0 +1,18 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf returns -1 if 'length' is 0 (length
+    overridden to false (type conversion))
+---*/
+
+var i = Array.prototype.lastIndexOf.call({
+  length: false
+}, 1);
+
+
+assert.sameValue(i, -1, 'i');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-4-4.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-4-4.js
new file mode 100644
index 0000000000..c244013353
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-4-4.js
@@ -0,0 +1,24 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf returns -1 if 'length' is 0 (generic
+    'array' with length 0 )
+---*/
+
+foo.prototype = new Array(1, 2, 3);
+
+function foo() {}
+var f = new foo();
+f.length = 0;
+
+var i = Array.prototype.lastIndexOf.call({
+  length: 0
+}, 1);
+
+
+assert.sameValue(i, -1, 'i');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-4-5.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-4-5.js
new file mode 100644
index 0000000000..0e714da0d2
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-4-5.js
@@ -0,0 +1,18 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf returns -1 if 'length' is 0 ( length
+    overridden to '0' (type conversion))
+---*/
+
+var i = Array.prototype.lastIndexOf.call({
+  length: '0'
+}, 1);
+
+
+assert.sameValue(i, -1, 'i');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-4-6.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-4-6.js
new file mode 100644
index 0000000000..a306208a54
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-4-6.js
@@ -0,0 +1,22 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf returns -1 if 'length' is 0
+    (subclassed Array, length overridden with obj with valueOf)
+---*/
+
+var i = Array.prototype.lastIndexOf.call({
+  length: {
+    valueOf: function() {
+      return 0;
+    }
+  }
+}, 1);
+
+
+assert.sameValue(i, -1, 'i');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-4-7.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-4-7.js
new file mode 100644
index 0000000000..427740b352
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-4-7.js
@@ -0,0 +1,39 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf returns -1 if 'length' is 0 ( length
+    is object overridden with obj w/o valueOf (toString))
+---*/
+
+foo.prototype = new Array(1, 2, 3);
+
+function foo() {}
+var f = new foo();
+
+var o = {
+  toString: function() {
+    return '0';
+  }
+};
+f.length = o;
+
+// objects inherit the default valueOf method of the Object object;
+// that simply returns the itself. Since the default valueOf() method
+// does not return a primitive value, ES next tries to convert the object
+// to a number by calling its toString() method and converting the
+// resulting string to a number.
+var i = Array.prototype.lastIndexOf.call({
+  length: {
+    toString: function() {
+      return '0';
+    }
+  }
+}, 1);
+
+
+assert.sameValue(i, -1, 'i');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-4-8.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-4-8.js
new file mode 100644
index 0000000000..cf499e8c88
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-4-8.js
@@ -0,0 +1,31 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf returns -1 if 'length' is 0 (length is
+    an empty array)
+---*/
+
+// objects inherit the default valueOf method of the Object object;
+// that simply returns the itself. Since the default valueOf() method
+// does not return a primitive value, ES next tries to convert the object
+// to a number by calling its toString() method and converting the
+// resulting string to a number.
+//
+// The toString( ) method on Array converts the array elements to strings,
+// then returns the result of concatenating these strings, with commas in
+// between. An array with no elements converts to the empty string, which
+// converts to the number 0. If an array has a single element that is a
+// number n, the array converts to a string representation of n, which is
+// then converted back to n itself. If an array contains more than one element,
+// or if its one element is not a number, the array converts to NaN.
+var i = Array.prototype.lastIndexOf.call({
+  length: []
+}, 1);
+
+
+assert.sameValue(i, -1, 'i');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-4-9.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-4-9.js
new file mode 100644
index 0000000000..8f45c25286
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-4-9.js
@@ -0,0 +1,18 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: Array.prototype.lastIndexOf - 'length' is a number of value 0.1
+---*/
+
+var targetObj = [];
+var obj = {
+  0: targetObj,
+  100: targetObj,
+  length: 0.1
+};
+
+assert.sameValue(Array.prototype.lastIndexOf.call(obj, targetObj), -1, 'Array.prototype.lastIndexOf.call(obj, targetObj)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-5-1.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-5-1.js
new file mode 100644
index 0000000000..d3cdfb1cc3
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-5-1.js
@@ -0,0 +1,14 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: Array.prototype.lastIndexOf when fromIndex is string
+---*/
+
+var a = new Array(0, 1, 1);
+
+assert.sameValue(a.lastIndexOf(1, "1"), 1, '"1" resolves to 1');
+assert.sameValue(a.lastIndexOf(1, "one"), -1, 'NaN string resolves to 01');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-5-10.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-5-10.js
new file mode 100644
index 0000000000..54e6f8d483
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-5-10.js
@@ -0,0 +1,16 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf - value of 'fromIndex' is a number
+    (value is positive number)
+---*/
+
+var targetObj = {};
+
+assert.sameValue([0, targetObj, true].lastIndexOf(targetObj, 1.5), 1, '[0, targetObj, true].lastIndexOf(targetObj, 1.5)');
+assert.sameValue([0, true, targetObj].lastIndexOf(targetObj, 1.5), -1, '[0, true, targetObj].lastIndexOf(targetObj, 1.5)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-5-11.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-5-11.js
new file mode 100644
index 0000000000..a7ba8fac31
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-5-11.js
@@ -0,0 +1,16 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf - value of 'fromIndex' is a number
+    (value is negative number)
+---*/
+
+var targetObj = {};
+
+assert.sameValue([0, targetObj, true].lastIndexOf(targetObj, -2.5), 1, '[0, targetObj, true].lastIndexOf(targetObj, -2.5)');
+assert.sameValue([0, true, targetObj].lastIndexOf(targetObj, -2.5), -1, '[0, true, targetObj].lastIndexOf(targetObj, -2.5)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-5-12.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-5-12.js
new file mode 100644
index 0000000000..d43456a631
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-5-12.js
@@ -0,0 +1,16 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf - value of 'fromIndex' is a number
+    (value is Infinity)
+---*/
+
+var arr = [];
+arr[Math.pow(2, 32) - 2] = null; // length is the max value of Uint type
+
+assert.sameValue(arr.lastIndexOf(null, Infinity), Math.pow(2, 32) - 2, 'arr.lastIndexOf(null, Infinity)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-5-13.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-5-13.js
new file mode 100644
index 0000000000..8dd7c0b72d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-5-13.js
@@ -0,0 +1,13 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf - value of 'fromIndex' is a number
+    (value is -Infinity)
+---*/
+
+assert.sameValue([true].lastIndexOf(true, -Infinity), -1, '[true].lastIndexOf(true, -Infinity)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-5-14.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-5-14.js
new file mode 100644
index 0000000000..719c88cd1b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-5-14.js
@@ -0,0 +1,17 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf - value of 'fromIndex' is a number
+    (value is NaN)
+---*/
+
+// from Index will be convert to +0
+assert.sameValue([0, true].lastIndexOf(true, NaN), -1, '[0, true].lastIndexOf(true, NaN)');
+assert.sameValue([true, 0].lastIndexOf(true, NaN), 0, '[true, 0].lastIndexOf(true, NaN)');
+assert.sameValue([0, true].lastIndexOf(true, -NaN), -1, '[0, true].lastIndexOf(true, -NaN)');
+assert.sameValue([true, 0].lastIndexOf(true, -NaN), 0, '[true, 0].lastIndexOf(true, -NaN)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-5-15.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-5-15.js
new file mode 100644
index 0000000000..5e0bea2c89
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-5-15.js
@@ -0,0 +1,14 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf - value of 'fromIndex' is a string
+    containing a negative number
+---*/
+
+assert.sameValue([0, "-2", 2].lastIndexOf("-2", "-2"), 1, '[0, "-2", 2].lastIndexOf("-2", "-2")');
+assert.sameValue([0, 2, "-2"].lastIndexOf("-2", "-2"), -1, '[0, 2, "-2"].lastIndexOf("-2", "-2")');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-5-16.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-5-16.js
new file mode 100644
index 0000000000..3732ca9a21
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-5-16.js
@@ -0,0 +1,16 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf - value of 'fromIndex' is a string
+    containing Infinity
+---*/
+
+var arr = [];
+arr[Math.pow(2, 32) - 2] = true; // length is the max value of Uint type
+
+assert.sameValue(arr.lastIndexOf(true, "Infinity"), Math.pow(2, 32) - 2, 'arr.lastIndexOf(true, "Infinity")');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-5-17.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-5-17.js
new file mode 100644
index 0000000000..cbb216b417
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-5-17.js
@@ -0,0 +1,13 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf - value of 'fromIndex' is a string
+    containing -Infinity
+---*/
+
+assert.sameValue([true].lastIndexOf(true, "-Infinity"), -1, '[true].lastIndexOf(true, "-Infinity")');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-5-18.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-5-18.js
new file mode 100644
index 0000000000..f38439c1c6
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-5-18.js
@@ -0,0 +1,16 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf - value of 'fromIndex' is a string
+    containing an exponential number
+---*/
+
+var targetObj = {};
+
+assert.sameValue([0, NaN, targetObj, 3, false].lastIndexOf(targetObj, "2E0"), 2, '[0, NaN, targetObj, 3, false].lastIndexOf(targetObj, "2E0")');
+assert.sameValue([0, NaN, 3, targetObj, false].lastIndexOf(targetObj, "2E0"), -1, '[0, NaN, 3, targetObj, false].lastIndexOf(targetObj, "2E0")');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-5-19.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-5-19.js
new file mode 100644
index 0000000000..6045c3150d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-5-19.js
@@ -0,0 +1,16 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf - value of 'fromIndex' is a string
+    containing a hex number
+---*/
+
+var targetObj = {};
+
+assert.sameValue([0, true, targetObj, 3, false].lastIndexOf(targetObj, "0x0002"), 2, '[0, true, targetObj, 3, false].lastIndexOf(targetObj, "0x0002")');
+assert.sameValue([0, true, 3, targetObj, false].lastIndexOf(targetObj, "0x0002"), -1, '[0, true, 3, targetObj, false].lastIndexOf(targetObj, "0x0002")');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-5-2.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-5-2.js
new file mode 100644
index 0000000000..81044c0f9a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-5-2.js
@@ -0,0 +1,15 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: Array.prototype.lastIndexOf when fromIndex is floating point number
+---*/
+
+var a = new Array(1, 2, 1);
+
+assert.sameValue(a.lastIndexOf(2, 1.49), 1, '1.49 resolves to 1');
+assert.sameValue(a.lastIndexOf(2, 0.51), -1, '0.51 resolves to 0');
+assert.sameValue(a.lastIndexOf(1, 0.51), 0, '0.51 resolves to 0');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-5-20.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-5-20.js
new file mode 100644
index 0000000000..d4aeda529e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-5-20.js
@@ -0,0 +1,16 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf - value of 'fromIndex' which is a
+    string containing a number with leading zeros
+---*/
+
+var targetObj = {};
+
+assert.sameValue([0, true, targetObj, 3, false].lastIndexOf(targetObj, "0002.10"), 2, '[0, true, targetObj, 3, false].lastIndexOf(targetObj, "0002.10")');
+assert.sameValue([0, true, 3, targetObj, false].lastIndexOf(targetObj, "0002.10"), -1, '[0, true, 3, targetObj, false].lastIndexOf(targetObj, "0002.10")');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-5-21.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-5-21.js
new file mode 100644
index 0000000000..135ca125b4
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-5-21.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf - value of 'fromIndex' which is an
+    Object, and has an own toString method
+---*/
+
+// objects inherit the default valueOf() method from Object
+// that simply returns itself. Since the default valueOf() method
+// does not return a primitive value, ES next tries to convert the object
+// to a number by calling its toString() method and converting the
+// resulting string to a number.
+var fromIndex = {
+  toString: function() {
+    return '2';
+  }
+};
+var targetObj = new RegExp();
+
+assert.sameValue([0, true, targetObj, 3, false].lastIndexOf(targetObj, fromIndex), 2, '[0, true, targetObj, 3, false].lastIndexOf(targetObj, fromIndex)');
+assert.sameValue([0, true, 3, targetObj, false].lastIndexOf(targetObj, fromIndex), -1, '[0, true, 3, targetObj, false].lastIndexOf(targetObj, fromIndex)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-5-22.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-5-22.js
new file mode 100644
index 0000000000..66c7181a62
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-5-22.js
@@ -0,0 +1,22 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf - value of 'fromIndex' which is an
+    object, and has an own valueOf method
+---*/
+
+var fromIndex = {
+  valueOf: function() {
+    return 2;
+  }
+};
+
+var targetObj = function() {};
+
+assert.sameValue([0, true, targetObj, 3, false].lastIndexOf(targetObj, fromIndex), 2, '[0, true, targetObj, 3, false].lastIndexOf(targetObj, fromIndex)');
+assert.sameValue([0, true, 3, targetObj, false].lastIndexOf(targetObj, fromIndex), -1, '[0, true, 3, targetObj, false].lastIndexOf(targetObj, fromIndex)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-5-23.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-5-23.js
new file mode 100644
index 0000000000..5b47483aba
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-5-23.js
@@ -0,0 +1,31 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf - value of 'fromIndex' is an object
+    that has an own valueOf method that returns an object and toString
+    method that returns a string
+---*/
+
+var toStringAccessed = false;
+var valueOfAccessed = false;
+
+var fromIndex = {
+  toString: function() {
+    toStringAccessed = true;
+    return '1';
+  },
+
+  valueOf: function() {
+    valueOfAccessed = true;
+    return {};
+  }
+};
+
+assert.sameValue([0, true].lastIndexOf(true, fromIndex), 1, '[0, true].lastIndexOf(true, fromIndex)');
+assert(toStringAccessed, 'toStringAccessed !== true');
+assert(valueOfAccessed, 'valueOfAccessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-5-24.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-5-24.js
new file mode 100644
index 0000000000..241fd28960
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-5-24.js
@@ -0,0 +1,34 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf throws TypeError exception when value
+    of 'fromIndex' is an object that both toString and valueOf methods
+    than don't return primitive value
+---*/
+
+var toStringAccessed = false;
+var valueOfAccessed = false;
+
+var fromIndex = {
+  toString: function() {
+    toStringAccessed = true;
+    return {};
+  },
+
+  valueOf: function() {
+    valueOfAccessed = true;
+    return {};
+  }
+};
+
+assert.throws(TypeError, function() {
+  [0, null].lastIndexOf(null, fromIndex);
+});
+
+assert(toStringAccessed, 'toStringAccessed');
+assert(valueOfAccessed, 'valueOfAccessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-5-25.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-5-25.js
new file mode 100644
index 0000000000..880fd7b678
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-5-25.js
@@ -0,0 +1,35 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf use inherited valueOf method when
+    value of 'fromIndex' is an object with an own toString and
+    inherited valueOf methods
+---*/
+
+var toStringAccessed = false;
+var valueOfAccessed = false;
+
+var proto = {
+  valueOf: function() {
+    valueOfAccessed = true;
+    return 1;
+  }
+};
+
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+child.toString = function() {
+  toStringAccessed = true;
+  return 1;
+};
+
+assert.sameValue([0, true].lastIndexOf(true, child), 1, '[0, true].lastIndexOf(true, child)');
+assert(valueOfAccessed, 'valueOfAccessed !== true');
+assert.sameValue(toStringAccessed, false, 'toStringAccessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-5-26.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-5-26.js
new file mode 100644
index 0000000000..99f034bb86
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-5-26.js
@@ -0,0 +1,38 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf - side effects produced by step 2 are
+    visible when an exception occurs
+---*/
+
+var stepTwoOccurs = false;
+var stepFiveOccurs = false;
+var obj = {};
+
+Object.defineProperty(obj, "length", {
+  get: function() {
+    stepTwoOccurs = true;
+    if (stepFiveOccurs) {
+      throw new Error("Step 5 occurred out of order");
+    }
+    return 20;
+  },
+  configurable: true
+});
+
+var fromIndex = {
+  valueOf: function() {
+    stepFiveOccurs = true;
+    return 0;
+  }
+};
+
+Array.prototype.lastIndexOf.call(obj, undefined, fromIndex);
+
+assert(stepTwoOccurs, 'stepTwoOccurs !== true');
+assert(stepFiveOccurs, 'stepFiveOccurs !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-5-27.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-5-27.js
new file mode 100644
index 0000000000..446fa542ca
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-5-27.js
@@ -0,0 +1,43 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf - side effects produced by step 3 are
+    visible when an exception occurs
+---*/
+
+var stepThreeOccurs = false;
+var stepFiveOccurs = false;
+
+var obj = {};
+
+Object.defineProperty(obj, "length", {
+  get: function() {
+    return {
+      valueOf: function() {
+        stepThreeOccurs = true;
+        if (stepFiveOccurs) {
+          throw new Error("Step 5 occurred out of order");
+        }
+        return 20;
+      }
+    };
+  },
+  configurable: true
+});
+
+var fromIndex = {
+  valueOf: function() {
+    stepFiveOccurs = true;
+    return 0;
+  }
+};
+
+Array.prototype.lastIndexOf.call(obj, undefined, fromIndex);
+
+assert(stepThreeOccurs, 'stepThreeOccurs !== true');
+assert(stepFiveOccurs, 'stepFiveOccurs !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-5-28.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-5-28.js
new file mode 100644
index 0000000000..27b7d245bb
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-5-28.js
@@ -0,0 +1,23 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf - side effects produced by step 1 are
+    visible when an exception occurs
+---*/
+
+var stepFiveOccurs = false;
+var fromIndex = {
+  valueOf: function() {
+    stepFiveOccurs = true;
+    return 0;
+  }
+};
+assert.throws(TypeError, function() {
+  Array.prototype.lastIndexOf.call(undefined, undefined, fromIndex);
+});
+assert.sameValue(stepFiveOccurs, false, 'stepFiveOccurs');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-5-29.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-5-29.js
new file mode 100644
index 0000000000..c5a9ce14be
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-5-29.js
@@ -0,0 +1,32 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf - side effects produced by step 2 are
+    visible when an exception occurs
+---*/
+
+var stepFiveOccurs = false;
+
+var obj = {};
+Object.defineProperty(obj, "length", {
+  get: function() {
+    throw new RangeError();
+  },
+  configurable: true
+});
+
+var fromIndex = {
+  valueOf: function() {
+    stepFiveOccurs = true;
+    return 0;
+  }
+};
+assert.throws(RangeError, function() {
+  Array.prototype.lastIndexOf.call(obj, undefined, fromIndex);
+});
+assert.sameValue(stepFiveOccurs, false, 'stepFiveOccurs');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-5-3.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-5-3.js
new file mode 100644
index 0000000000..56bfd0e78b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-5-3.js
@@ -0,0 +1,14 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: Array.prototype.lastIndexOf when fromIndex is boolean
+---*/
+
+var a = new Array(1, 2, 1);
+
+assert.sameValue(a.lastIndexOf(2, true), 1, 'true resolves to 1');
+assert.sameValue(a.lastIndexOf(2, false), -1, 'false resolves to 0');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-5-30.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-5-30.js
new file mode 100644
index 0000000000..4d4f6f0633
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-5-30.js
@@ -0,0 +1,36 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf - side effects produced by step 3 are
+    visible when an exception occurs
+---*/
+
+var stepFiveOccurs = false;
+
+var obj = {};
+Object.defineProperty(obj, "length", {
+  get: function() {
+    return {
+      valueOf: function() {
+        throw new TypeError();
+      }
+    };
+  },
+  configurable: true
+});
+
+var fromIndex = {
+  valueOf: function() {
+    stepFiveOccurs = true;
+    return 0;
+  }
+};
+assert.throws(TypeError, function() {
+  Array.prototype.lastIndexOf.call(obj, undefined, fromIndex);
+});
+assert.sameValue(stepFiveOccurs, false, 'stepFiveOccurs');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-5-31.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-5-31.js
new file mode 100644
index 0000000000..7c4c6a233a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-5-31.js
@@ -0,0 +1,16 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf - 'fromIndex' is a positive
+    non-integer, verify truncation occurs in the proper direction
+---*/
+
+var targetObj = {};
+
+assert.sameValue([0, targetObj, true].lastIndexOf(targetObj, 1.5), 1, '[0, targetObj, true].lastIndexOf(targetObj, 1.5)');
+assert.sameValue([0, true, targetObj].lastIndexOf(targetObj, 1.5), -1, '[0, true, targetObj].lastIndexOf(targetObj, 1.5)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-5-32.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-5-32.js
new file mode 100644
index 0000000000..8e1431b6b3
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-5-32.js
@@ -0,0 +1,16 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf - 'fromIndex' is a negative
+    non-integer, verify truncation occurs in the proper direction
+---*/
+
+var targetObj = {};
+
+assert.sameValue([0, targetObj, true].lastIndexOf(targetObj, -2.5), 1, '[0, targetObj, true].lastIndexOf(targetObj, -2.5)');
+assert.sameValue([0, true, targetObj].lastIndexOf(targetObj, -2.5), -1, '[0, true, targetObj].lastIndexOf(targetObj, -2.5)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-5-33.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-5-33.js
new file mode 100644
index 0000000000..6768c47c48
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-5-33.js
@@ -0,0 +1,17 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf - match on the first element, a middle
+    element and the last element when 'fromIndex' is passed
+---*/
+
+assert.sameValue([0, 1, 2, 3, 4].lastIndexOf(0, 0), 0, '[0, 1, 2, 3, 4].lastIndexOf(0, 0)');
+assert.sameValue([0, 1, 2, 3, 4].lastIndexOf(0, 2), 0, '[0, 1, 2, 3, 4].lastIndexOf(0, 2)');
+assert.sameValue([0, 1, 2, 3, 4].lastIndexOf(2, 2), 2, '[0, 1, 2, 3, 4].lastIndexOf(2, 2)');
+assert.sameValue([0, 1, 2, 3, 4].lastIndexOf(2, 4), 2, '[0, 1, 2, 3, 4].lastIndexOf(2, 4)');
+assert.sameValue([0, 1, 2, 3, 4].lastIndexOf(4, 4), 4, '[0, 1, 2, 3, 4].lastIndexOf(4, 4)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-5-4.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-5-4.js
new file mode 100644
index 0000000000..6ae526981b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-5-4.js
@@ -0,0 +1,16 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: Array.prototype.lastIndexOf when fromIndex is undefined
+---*/
+
+var a = new Array(1, 2, 1);
+
+// undefined resolves to 0, no second argument resolves to len
+assert.sameValue(a.lastIndexOf(2, undefined), -1, 'a.lastIndexOf(2,undefined)');
+assert.sameValue(a.lastIndexOf(1, undefined), 0, 'a.lastIndexOf(1,undefined)');
+assert.sameValue(a.lastIndexOf(1), 2, 'a.lastIndexOf(1)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-5-5.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-5-5.js
new file mode 100644
index 0000000000..1c5773d639
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-5-5.js
@@ -0,0 +1,15 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: Array.prototype.lastIndexOf when fromIndex is null
+---*/
+
+var a = new Array(1, 2, 1);
+
+// null resolves to 0
+assert.sameValue(a.lastIndexOf(2, null), -1, 'a.lastIndexOf(2,null)');
+assert.sameValue(a.lastIndexOf(1, null), 0, 'a.lastIndexOf(1,null)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-5-6.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-5-6.js
new file mode 100644
index 0000000000..80cc1a0171
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-5-6.js
@@ -0,0 +1,16 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: Array.prototype.lastIndexOf when 'fromIndex' isn't passed
+---*/
+
+var arr = [0, 1, 2, 3, 4];
+//'fromIndex' will be set as 4 if not passed by default
+
+assert.sameValue(arr.lastIndexOf(0), arr.lastIndexOf(0, 4), 'arr.lastIndexOf(0)');
+assert.sameValue(arr.lastIndexOf(2), arr.lastIndexOf(2, 4), 'arr.lastIndexOf(2)');
+assert.sameValue(arr.lastIndexOf(4), arr.lastIndexOf(4, 4), 'arr.lastIndexOf(4)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-5-7.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-5-7.js
new file mode 100644
index 0000000000..a35ae973b1
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-5-7.js
@@ -0,0 +1,14 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf - value of 'fromIndex' is a number
+    (value is 0)
+---*/
+
+assert.sameValue([0, 100].lastIndexOf(100, 0), -1, 'verify fromIndex is not more than 0');
+assert.sameValue([200, 0].lastIndexOf(200, 0), 0, 'verify fromIndex is not less than 0');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-5-8.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-5-8.js
new file mode 100644
index 0000000000..3197f71bf5
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-5-8.js
@@ -0,0 +1,14 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf - value of 'fromIndex' is a number
+    (value is +0)
+---*/
+
+assert.sameValue([0, true].lastIndexOf(true, +0), -1, '[0, true].lastIndexOf(true, +0)');
+assert.sameValue([true, 0].lastIndexOf(true, +0), 0, '[true, 0].lastIndexOf(true, +0)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-5-9.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-5-9.js
new file mode 100644
index 0000000000..c253f21f73
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-5-9.js
@@ -0,0 +1,14 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf - value of 'fromIndex' is a number
+    (value is -0)
+---*/
+
+assert.sameValue([0, true].lastIndexOf(true, -0), -1, '[0, true].lastIndexOf(true, -0)');
+assert.sameValue([true, 0].lastIndexOf(true, -0), 0, '[true, 0].lastIndexOf(true, -0)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-6-1.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-6-1.js
new file mode 100644
index 0000000000..955920f7ec
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-6-1.js
@@ -0,0 +1,16 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf when fromIndex greater than
+    Array.length
+---*/
+
+var a = new Array(1, 2, 3);
+
+assert.sameValue(a.lastIndexOf(3, 5.4), 2, 'a.lastIndexOf(3,5.4)');
+assert.sameValue(a.lastIndexOf(3, 3.1), 2, 'a.lastIndexOf(3,3.1)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-6-2.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-6-2.js
new file mode 100644
index 0000000000..f0844197a5
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-6-2.js
@@ -0,0 +1,13 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf returns correct index when 'fromIndex'
+    is length of array - 1
+---*/
+
+assert.sameValue([1, 2, 3].lastIndexOf(3, 2), 2, '[1, 2, 3].lastIndexOf(3, 2)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-6-3.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-6-3.js
new file mode 100644
index 0000000000..ee9c2981b4
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-6-3.js
@@ -0,0 +1,13 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf returns -1 when 'fromIndex' is length
+    of array - 1
+---*/
+
+assert.sameValue([1, 2, 3].lastIndexOf(3, 1), -1, '[1, 2, 3].lastIndexOf(3, 1)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-6-4.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-6-4.js
new file mode 100644
index 0000000000..8bdf1136b4
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-6-4.js
@@ -0,0 +1,13 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf returns -1 when 'fromIndex' and
+    'length' are both 0
+---*/
+
+assert.sameValue([].lastIndexOf(1, 0), -1, '[].lastIndexOf(1, 0)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-6-5.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-6-5.js
new file mode 100644
index 0000000000..7446566b69
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-6-5.js
@@ -0,0 +1,11 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: Array.prototype.lastIndexOf returns -1 when 'fromIndex' is 1
+---*/
+
+assert.sameValue([1, 2, 3].lastIndexOf(3, 1), -1, '[1, 2, 3].lastIndexOf(3, 1)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-6-6.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-6-6.js
new file mode 100644
index 0000000000..b298623733
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-6-6.js
@@ -0,0 +1,13 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf returns correct index when 'fromIndex'
+    is 1
+---*/
+
+assert.sameValue([1, 2, 3].lastIndexOf(2, 1), 1, '[1, 2, 3].lastIndexOf(2, 1)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-7-1.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-7-1.js
new file mode 100644
index 0000000000..b80100b7e4
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-7-1.js
@@ -0,0 +1,16 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: Array.prototype.lastIndexOf with negative fromIndex
+---*/
+
+var a = new Array(1, 2, 3);
+
+
+assert.sameValue(a.lastIndexOf(2, -2), 1, 'a.lastIndexOf(2,-2)');
+assert.sameValue(a.lastIndexOf(2, -3), -1, 'a.lastIndexOf(2,-3)');
+assert.sameValue(a.lastIndexOf(1, -5.3), -1, 'a.lastIndexOf(1,-5.3)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-7-2.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-7-2.js
new file mode 100644
index 0000000000..3cf39efa6b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-7-2.js
@@ -0,0 +1,13 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf returns correct index when 'fromIndex'
+    is -1
+---*/
+
+assert.sameValue([1, 2, 3, 4].lastIndexOf(4, -1), 3, '[1, 2, 3, 4].lastIndexOf(4, -1)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-7-3.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-7-3.js
new file mode 100644
index 0000000000..dfd6dcbf92
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-7-3.js
@@ -0,0 +1,13 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf returns -1 when abs('fromIndex') is
+    length of array - 1
+---*/
+
+assert.sameValue([1, 2, 3, 4].lastIndexOf(3, -3), -1, '[1, 2, 3, 4].lastIndexOf(3, -3)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-7-4.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-7-4.js
new file mode 100644
index 0000000000..460ed58951
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-7-4.js
@@ -0,0 +1,13 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf returns -1 when abs('fromIndex') is
+    length of array
+---*/
+
+assert.sameValue([1, 2, 3, 4].lastIndexOf(2, -4), -1, '[1, 2, 3, 4].lastIndexOf(2, -4)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-1.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-1.js
new file mode 100644
index 0000000000..1c260c4cb9
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-1.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: Array.prototype.lastIndexOf must return correct index(boolean)
+---*/
+
+var obj = {
+  toString: function() {
+    return true
+  }
+};
+var _false = false;
+var a = new Array(false, true, false, obj, _false, true, "true", undefined, 0, null, 1, "str", 0, 1);
+
+assert.sameValue(a.lastIndexOf(true), 5, 'a[5]=true');
+assert.sameValue(a.lastIndexOf(false), 4, 'a[4] =_false');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-10.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-10.js
new file mode 100644
index 0000000000..2915a82e7a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-10.js
@@ -0,0 +1,21 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    note that prior to the finally ES5 draft SameValue was used for comparisions
+    and hence NaNs could be found using lastIndexOf *
+esid: sec-array.prototype.lastindexof
+description: Array.prototype.lastIndexOf must return correct index (NaN)
+---*/
+
+var _NaN = NaN;
+var a = new Array("NaN", _NaN, NaN, undefined, 0, false, null, {
+  toString: function() {
+    return NaN
+  }
+}, "false");
+
+assert.sameValue(a.lastIndexOf(NaN), -1, 'NaN matches nothing, not even itself');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-11.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-11.js
new file mode 100644
index 0000000000..27fcf1ddfa
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-11.js
@@ -0,0 +1,23 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf - the length of iteration isn't
+    changed by adding elements to the array during iteration
+---*/
+
+var arr = [20];
+
+Object.defineProperty(arr, "0", {
+  get: function() {
+    arr[1] = 1;
+    return 0;
+  },
+  configurable: true
+});
+
+assert.sameValue(arr.lastIndexOf(1), -1, 'arr.lastIndexOf(1)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-2.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-2.js
new file mode 100644
index 0000000000..bd64d700ea
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-2.js
@@ -0,0 +1,23 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: Array.prototype.lastIndexOf must return correct index(Number)
+---*/
+
+var obj = {
+  toString: function() {
+    return 0
+  }
+};
+var one = 1;
+var _float = -(4 / 3);
+var a = new Array(+0, true, 0, -0, false, undefined, null, "0", obj, _float, -(4 / 3), -1.3333333333333, "str", one, 1, false);
+
+assert.sameValue(a.lastIndexOf(-(4 / 3)), 10, 'a[10]=-(4/3)');
+assert.sameValue(a.lastIndexOf(0), 3, 'a[3] = -0, but using === -0 and 0 are equal');
+assert.sameValue(a.lastIndexOf(-0), 3, 'a[3] = -0');
+assert.sameValue(a.lastIndexOf(1), 14, 'a[14] = 1');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-3.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-3.js
new file mode 100644
index 0000000000..253cc86161
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-3.js
@@ -0,0 +1,19 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: Array.prototype.lastIndexOf must return correct index(string)
+---*/
+
+var obj = {
+  toString: function() {
+    return "false"
+  }
+};
+var szFalse = "false";
+var a = new Array(szFalse, "false", "false1", undefined, 0, false, null, 1, obj, 0);
+
+assert.sameValue(a.lastIndexOf("false"), 1, 'a.lastIndexOf("false")');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-4.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-4.js
new file mode 100644
index 0000000000..f32dfa8da7
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-4.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: Array.prototype.lastIndexOf must return correct index(undefined)
+---*/
+
+var obj = {
+  toString: function() {
+    return undefined;
+  }
+};
+var _undefined1 = undefined;
+var _undefined2;
+var a = new Array(_undefined1, _undefined2, undefined, true, 0, false, null, 1, "undefined", obj, 1);
+
+assert.sameValue(a.lastIndexOf(undefined), 2, 'a.lastIndexOf(undefined)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-5.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-5.js
new file mode 100644
index 0000000000..70abd20bc2
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-5.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: Array.prototype.lastIndexOf must return correct index(Object)
+---*/
+
+var obj1 = {
+  toString: function() {
+    return "false"
+  }
+};
+var obj2 = {
+  toString: function() {
+    return "false"
+  }
+};
+var obj3 = obj1;
+var a = new Array(obj2, obj1, obj3, false, undefined, 0, false, null, {
+  toString: function() {
+    return "false"
+  }
+}, "false");
+
+assert.sameValue(a.lastIndexOf(obj3), 2, 'a.lastIndexOf(obj3)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-6.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-6.js
new file mode 100644
index 0000000000..6dcade2541
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-6.js
@@ -0,0 +1,19 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: Array.prototype.lastIndexOf must return correct index(null)
+---*/
+
+var obj = {
+  toString: function() {
+    return null
+  }
+};
+var _null = null;
+var a = new Array(true, undefined, 0, false, null, 1, "str", 0, 1, null, true, false, undefined, _null, "null", undefined, "str", obj);
+
+assert.sameValue(a.lastIndexOf(null), 13, 'a.lastIndexOf(null)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-7.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-7.js
new file mode 100644
index 0000000000..c564170300
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-7.js
@@ -0,0 +1,17 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf must return correct index (self
+    reference)
+---*/
+
+var a = new Array(0, 1, 2, 3);
+a[2] = a;
+
+assert.sameValue(a.lastIndexOf(a), 2, 'a.lastIndexOf(a)');
+assert.sameValue(a.lastIndexOf(3), 3, 'a.lastIndexOf(3)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-8.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-8.js
new file mode 100644
index 0000000000..d31afa8f21
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-8.js
@@ -0,0 +1,15 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: Array.prototype.lastIndexOf must return correct index (Array)
+---*/
+
+var b = new Array("0,1");
+var a = new Array(0, b, "0,1", 3);
+
+assert.sameValue(a.lastIndexOf(b.toString()), 2, 'a.lastIndexOf(b.toString())');
+assert.sameValue(a.lastIndexOf("0,1"), 2, 'a.lastIndexOf("0,1")');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-9.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-9.js
new file mode 100644
index 0000000000..142287e556
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-9.js
@@ -0,0 +1,27 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf must return correct index (Sparse
+    Array)
+---*/
+
+var a = new Array(0, 1);
+a[4294967294] = 2; // 2^32-2 - is max array element index
+a[4294967295] = 3; // 2^32-1 added as non-array element property
+a[4294967296] = 4; // 2^32   added as non-array element property
+a[4294967297] = 5; // 2^32+1 added as non-array element property
+// stop searching near the end in case implementation actually tries to test all missing elements!!
+a[4294967200] = 3;
+a[4294967201] = 4;
+a[4294967202] = 5;
+
+
+assert.sameValue(a.lastIndexOf(2), 4294967294, 'a.lastIndexOf(2)');
+assert.sameValue(a.lastIndexOf(3), 4294967200, 'a.lastIndexOf(3)');
+assert.sameValue(a.lastIndexOf(4), 4294967201, 'a.lastIndexOf(4)');
+assert.sameValue(a.lastIndexOf(5), 4294967202, 'a.lastIndexOf(5)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-a-1.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-a-1.js
new file mode 100644
index 0000000000..842ce1212e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-a-1.js
@@ -0,0 +1,23 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf - added properties in step 2 are
+    visible here
+---*/
+
+var arr = {};
+
+Object.defineProperty(arr, "length", {
+  get: function() {
+    arr[2] = "length";
+    return 3;
+  },
+  configurable: true
+});
+
+assert.sameValue(Array.prototype.lastIndexOf.call(arr, "length"), 2, 'Array.prototype.lastIndexOf.call(arr, "length")');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-a-10.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-a-10.js
new file mode 100644
index 0000000000..7203adc20b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-a-10.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf - properties can be added to prototype
+    after current position are visited on an Array
+---*/
+
+var arr = [0, , 2];
+
+Object.defineProperty(arr, "2", {
+  get: function() {
+    Object.defineProperty(Array.prototype, "1", {
+      get: function() {
+        return 6.99;
+      },
+      configurable: true
+    });
+    return 0;
+  },
+  configurable: true
+});
+
+assert.sameValue(arr.lastIndexOf(6.99), 1, 'arr.lastIndexOf(6.99)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-a-11.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-a-11.js
new file mode 100644
index 0000000000..76ccef72e8
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-a-11.js
@@ -0,0 +1,32 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf - deleting own property causes index
+    property not to be visited on an Array-like object
+---*/
+
+var arr = {
+  length: 200
+};
+
+Object.defineProperty(arr, "1", {
+  get: function() {
+    return 6.99;
+  },
+  configurable: true
+});
+
+Object.defineProperty(arr, "100", {
+  get: function() {
+    delete arr[1];
+    return 0;
+  },
+  configurable: true
+});
+
+assert.sameValue(Array.prototype.lastIndexOf.call(arr, 6.99), -1, 'Array.prototype.lastIndexOf.call(arr, 6.99)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-a-12.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-a-12.js
new file mode 100644
index 0000000000..2f2acfd10e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-a-12.js
@@ -0,0 +1,30 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf - deleting own property causes index
+    property not to be visited on an Array
+---*/
+
+var arr = [1, 2, 3, 4];
+
+Object.defineProperty(arr, "1", {
+  get: function() {
+    return "6.99";
+  },
+  configurable: true
+});
+
+Object.defineProperty(arr, "3", {
+  get: function() {
+    delete arr[1];
+    return 0;
+  },
+  configurable: true
+});
+
+assert.sameValue(arr.lastIndexOf("6.99"), -1, 'arr.lastIndexOf("6.99")');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-a-13.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-a-13.js
new file mode 100644
index 0000000000..71733f1f61
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-a-13.js
@@ -0,0 +1,29 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf -  deleting property of prototype
+    causes prototype index property not to be visited on an Array-like
+    Object
+---*/
+
+var arr = {
+  2: 2,
+  length: 20
+};
+
+Object.defineProperty(arr, "3", {
+  get: function() {
+    delete Object.prototype[1];
+    return 0;
+  },
+  configurable: true
+});
+
+Object.prototype[1] = 1;
+
+assert.sameValue(Array.prototype.lastIndexOf.call(arr, 1), -1, 'Array.prototype.lastIndexOf.call(arr, 1)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-a-14.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-a-14.js
new file mode 100644
index 0000000000..f9a2d957c3
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-a-14.js
@@ -0,0 +1,25 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf -  deleting property of prototype
+    causes prototype index property not to be visited on an Array
+---*/
+
+var arr = [0, , 2];
+
+Object.defineProperty(arr, "20", {
+  get: function() {
+    delete Array.prototype[1];
+    return 0;
+  },
+  configurable: true
+});
+
+Array.prototype[1] = 1;
+
+assert.sameValue(arr.lastIndexOf(1), -1, 'arr.lastIndexOf(1)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-a-15.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-a-15.js
new file mode 100644
index 0000000000..c49c77510d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-a-15.js
@@ -0,0 +1,31 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf -  deleting own property with
+    prototype property causes prototype index property to be visited
+    on an Array-like object
+---*/
+
+var arr = {
+  0: 0,
+  1: 111,
+  2: 2,
+  length: 10
+};
+
+Object.defineProperty(arr, "6", {
+  get: function() {
+    delete arr[1];
+    return 0;
+  },
+  configurable: true
+});
+
+Object.prototype[1] = 1;
+
+assert.sameValue(Array.prototype.lastIndexOf.call(arr, 1), 1, 'Array.prototype.lastIndexOf.call(arr, 1)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-a-16.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-a-16.js
new file mode 100644
index 0000000000..1759de886d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-a-16.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf -  deleting own property with
+    prototype property causes prototype index property to be visited
+    on an Array
+---*/
+
+var arr = [0, 111, 2];
+
+Object.defineProperty(arr, "2", {
+  get: function() {
+    delete arr[1];
+    return 0;
+  },
+  configurable: true
+});
+
+Array.prototype[1] = 1;
+
+assert.sameValue(arr.lastIndexOf(1), 1, 'arr.lastIndexOf(1)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-a-17.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-a-17.js
new file mode 100644
index 0000000000..d31028ca92
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-a-17.js
@@ -0,0 +1,23 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf -  decreasing length of array causes
+    index property not to be visited
+---*/
+
+var arr = [0, 1, 2, "last", 4];
+
+Object.defineProperty(arr, "4", {
+  get: function() {
+    arr.length = 3;
+    return 0;
+  },
+  configurable: true
+});
+
+assert.sameValue(arr.lastIndexOf("last"), -1, 'arr.lastIndexOf("last")');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-a-18.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-a-18.js
new file mode 100644
index 0000000000..8ca10a1747
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-a-18.js
@@ -0,0 +1,30 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf -  decreasing length of array with
+    prototype property causes prototype index property to be visited
+---*/
+
+var arr = [0, 1, 2, 3, 4];
+
+Object.defineProperty(Array.prototype, "2", {
+  get: function() {
+    return "prototype";
+  },
+  configurable: true
+});
+
+Object.defineProperty(arr, "3", {
+  get: function() {
+    arr.length = 2;
+    return 1;
+  },
+  configurable: true
+});
+
+assert.sameValue(arr.lastIndexOf("prototype"), 2, 'arr.lastIndexOf("prototype")');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-a-19.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-a-19.js
new file mode 100644
index 0000000000..5c83ccc2eb
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-a-19.js
@@ -0,0 +1,31 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf -  decreasing length of array does not
+    delete non-configurable properties
+flags: [noStrict]
+---*/
+
+var arr = [0, 1, 2, 3];
+
+Object.defineProperty(arr, "2", {
+  get: function() {
+    return "unconfigurable";
+  },
+  configurable: false
+});
+
+Object.defineProperty(arr, "3", {
+  get: function() {
+    arr.length = 2;
+    return 1;
+  },
+  configurable: true
+});
+
+assert.sameValue(arr.lastIndexOf("unconfigurable"), 2, 'arr.lastIndexOf("unconfigurable")');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-a-2.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-a-2.js
new file mode 100644
index 0000000000..ba60f5372e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-a-2.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf -  added properties in step 5 are
+    visible here on an Array-like object
+---*/
+
+var arr = {
+  length: 30
+};
+var targetObj = function() {};
+
+var fromIndex = {
+  valueOf: function() {
+    arr[4] = targetObj;
+    return 10;
+  }
+};
+
+
+assert.sameValue(Array.prototype.lastIndexOf.call(arr, targetObj, fromIndex), 4, 'Array.prototype.lastIndexOf.call(arr, targetObj, fromIndex)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-a-3.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-a-3.js
new file mode 100644
index 0000000000..c2e793eca2
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-a-3.js
@@ -0,0 +1,24 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf -  added properties in step 5 are
+    visible here on an Array
+---*/
+
+var arr = [];
+arr.length = 30;
+var targetObj = function() {};
+
+var fromIndex = {
+  valueOf: function() {
+    arr[4] = targetObj;
+    return 11;
+  }
+};
+
+assert.sameValue(arr.lastIndexOf(targetObj, fromIndex), 4, 'arr.lastIndexOf(targetObj, fromIndex)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-a-4.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-a-4.js
new file mode 100644
index 0000000000..c679b73e99
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-a-4.js
@@ -0,0 +1,25 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf -  deleted properties in step 2 are
+    visible here
+---*/
+
+var arr = {
+  2: 6.99
+};
+
+Object.defineProperty(arr, "length", {
+  get: function() {
+    delete arr[2];
+    return 3;
+  },
+  configurable: true
+});
+
+assert.sameValue(Array.prototype.lastIndexOf.call(arr, 6.99), -1, 'Array.prototype.lastIndexOf.call(arr, 6.99)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-a-5.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-a-5.js
new file mode 100644
index 0000000000..e2334b5c8e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-a-5.js
@@ -0,0 +1,25 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf -  deleted properties of step 5 are
+    visible here on an Array-like object
+---*/
+
+var arr = {
+  10: false,
+  length: 30
+};
+
+var fromIndex = {
+  valueOf: function() {
+    delete arr[10];
+    return 15;
+  }
+};
+
+assert.sameValue(Array.prototype.lastIndexOf.call(arr, false, fromIndex), -1, 'Array.prototype.lastIndexOf.call(arr, false, fromIndex)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-a-6.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-a-6.js
new file mode 100644
index 0000000000..55b9946bcf
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-a-6.js
@@ -0,0 +1,24 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf -  deleted properties of step 5 are
+    visible here on an Array
+---*/
+
+var arr = [];
+arr[10] = "10";
+arr.length = 20;
+
+var fromIndex = {
+  valueOf: function() {
+    delete arr[10];
+    return 11;
+  }
+};
+
+assert.sameValue(arr.lastIndexOf("10", fromIndex), -1, 'arr.lastIndexOf("10", fromIndex)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-a-7.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-a-7.js
new file mode 100644
index 0000000000..2841b2d2ca
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-a-7.js
@@ -0,0 +1,30 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf -  properties added into own object
+    after current position are visited on an Array-like object
+---*/
+
+var arr = {
+  length: 8
+};
+
+Object.defineProperty(arr, "4", {
+  get: function() {
+    Object.defineProperty(arr, "1", {
+      get: function() {
+        return 1;
+      },
+      configurable: true
+    });
+    return 0;
+  },
+  configurable: true
+});
+
+assert.sameValue(Array.prototype.lastIndexOf.call(arr, 1), 1, 'Array.prototype.lastIndexOf.call(arr, 1)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-a-8.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-a-8.js
new file mode 100644
index 0000000000..4ef6ff9545
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-a-8.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf -  properties added into own object
+    after current position are visited on an Array
+---*/
+
+var arr = [0, , 2];
+
+Object.defineProperty(arr, "2", {
+  get: function() {
+    Object.defineProperty(arr, "1", {
+      get: function() {
+        return 1;
+      },
+      configurable: true
+    });
+    return 0;
+  },
+  configurable: true
+});
+
+assert.sameValue(arr.lastIndexOf(1), 1, 'arr.lastIndexOf(1)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-a-9.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-a-9.js
new file mode 100644
index 0000000000..4d49dddf43
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-a-9.js
@@ -0,0 +1,31 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf -  properties can be added to
+    prototype after current position are visited on an Array-like
+    object
+---*/
+
+var arr = {
+  length: 9
+};
+
+Object.defineProperty(arr, "4", {
+  get: function() {
+    Object.defineProperty(Object.prototype, "1", {
+      get: function() {
+        return Infinity;
+      },
+      configurable: true
+    });
+    return 0;
+  },
+  configurable: true
+});
+
+assert.sameValue(Array.prototype.lastIndexOf.call(arr, Infinity), 1, 'Array.prototype.lastIndexOf.call(arr, Infinity)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-b-1.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-b-1.js
new file mode 100644
index 0000000000..0b41785a4c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-b-1.js
@@ -0,0 +1,11 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: Array.prototype.lastIndexOf - undefined property wouldn't be called
+---*/
+
+assert.sameValue([0, , 2].lastIndexOf(undefined), -1, '[0, , 2].lastIndexOf(undefined)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-b-i-1.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-b-i-1.js
new file mode 100644
index 0000000000..2742fd255f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-b-i-1.js
@@ -0,0 +1,22 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf - element to be retrieved is own data
+    property on an Array-like object
+---*/
+
+var obj = {
+  0: 0,
+  1: 1,
+  2: 2,
+  length: 3
+};
+
+assert.sameValue(Array.prototype.lastIndexOf.call(obj, 0), 0, 'Array.prototype.lastIndexOf.call(obj, 0)');
+assert.sameValue(Array.prototype.lastIndexOf.call(obj, 1), 1, 'Array.prototype.lastIndexOf.call(obj, 1)');
+assert.sameValue(Array.prototype.lastIndexOf.call(obj, 2), 2, 'Array.prototype.lastIndexOf.call(obj, 2)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-b-i-10.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-b-i-10.js
new file mode 100644
index 0000000000..bc71c16406
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-b-i-10.js
@@ -0,0 +1,39 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf - element to be retrieved is own
+    accessor property on an Array-like object
+---*/
+
+var obj = {
+  length: 3
+};
+Object.defineProperty(obj, "0", {
+  get: function() {
+    return 0;
+  },
+  configurable: true
+});
+
+Object.defineProperty(obj, "1", {
+  get: function() {
+    return 1;
+  },
+  configurable: true
+});
+
+Object.defineProperty(obj, "2", {
+  get: function() {
+    return 2;
+  },
+  configurable: true
+});
+
+assert.sameValue(Array.prototype.lastIndexOf.call(obj, 0), 0, 'Array.prototype.lastIndexOf.call(obj, 0)');
+assert.sameValue(Array.prototype.lastIndexOf.call(obj, 1), 1, 'Array.prototype.lastIndexOf.call(obj, 1)');
+assert.sameValue(Array.prototype.lastIndexOf.call(obj, 2), 2, 'Array.prototype.lastIndexOf.call(obj, 2)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-b-i-11.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-b-i-11.js
new file mode 100644
index 0000000000..3da84aa06f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-b-i-11.js
@@ -0,0 +1,24 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf - element to be retrieved is own
+    accessor property that overrides an inherited data property on an
+    Array
+---*/
+
+var arr = [];
+
+Array.prototype[0] = false;
+Object.defineProperty(arr, "0", {
+  get: function() {
+    return true;
+  },
+  configurable: true
+});
+
+assert.sameValue(arr.lastIndexOf(true), 0, 'arr.lastIndexOf(true)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-b-i-12.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-b-i-12.js
new file mode 100644
index 0000000000..e370128354
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-b-i-12.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf - element to be retrieved is own
+    accessor property that overrides an inherited data property on an
+    Array-like object
+---*/
+
+var obj = {
+  length: 1
+};
+
+Object.prototype[0] = false;
+Object.defineProperty(obj, "0", {
+  get: function() {
+    return true;
+  },
+  configurable: true
+});
+
+assert.sameValue(Array.prototype.lastIndexOf.call(obj, true), 0, 'Array.prototype.lastIndexOf.call(obj, true)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-b-i-13.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-b-i-13.js
new file mode 100644
index 0000000000..48fb0deee0
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-b-i-13.js
@@ -0,0 +1,30 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf - element to be retrieved is own
+    accessor property that overrides an inherited accessor property on
+    an Array
+---*/
+
+var arr = [];
+
+Object.defineProperty(Array.prototype, "0", {
+  get: function() {
+    return false;
+  },
+  configurable: true
+});
+
+Object.defineProperty(arr, "0", {
+  get: function() {
+    return true;
+  },
+  configurable: true
+});
+
+assert.sameValue(arr.lastIndexOf(true), 0, 'arr.lastIndexOf(true)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-b-i-14.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-b-i-14.js
new file mode 100644
index 0000000000..3242cd10a7
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-b-i-14.js
@@ -0,0 +1,32 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf - element to be retrieved is own
+    accessor property that overrides an inherited accessor property on
+    an Array-like object
+---*/
+
+var obj = {
+  length: 1
+};
+
+Object.defineProperty(Object.prototype, "0", {
+  get: function() {
+    return false;
+  },
+  configurable: true
+});
+
+Object.defineProperty(obj, "0", {
+  get: function() {
+    return true;
+  },
+  configurable: true
+});
+
+assert.sameValue(Array.prototype.lastIndexOf.call(obj, true), 0, 'Array.prototype.lastIndexOf.call(obj, true)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-b-i-15.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-b-i-15.js
new file mode 100644
index 0000000000..17af30793e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-b-i-15.js
@@ -0,0 +1,36 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf - element to be retrieved is inherited
+    accessor property on an Array
+---*/
+
+Object.defineProperty(Array.prototype, "0", {
+  get: function() {
+    return 10;
+  },
+  configurable: true
+});
+
+Object.defineProperty(Array.prototype, "1", {
+  get: function() {
+    return 20;
+  },
+  configurable: true
+});
+
+Object.defineProperty(Array.prototype, "2", {
+  get: function() {
+    return 30;
+  },
+  configurable: true
+});
+
+assert.sameValue([, , , ].lastIndexOf(10), 0, '[, , , ].lastIndexOf(10)');
+assert.sameValue([, , , ].lastIndexOf(20), 1, '[, , , ].lastIndexOf(20)');
+assert.sameValue([, , , ].lastIndexOf(30), 2, '[, , , ].lastIndexOf(30)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-b-i-16.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-b-i-16.js
new file mode 100644
index 0000000000..08f99a3c0d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-b-i-16.js
@@ -0,0 +1,42 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf - element to be retrieved is inherited
+    accessor property on an Array-like object
+---*/
+
+Object.defineProperty(Object.prototype, "0", {
+  get: function() {
+    return 10;
+  },
+  configurable: true
+});
+
+Object.defineProperty(Object.prototype, "1", {
+  get: function() {
+    return 20;
+  },
+  configurable: true
+});
+
+Object.defineProperty(Object.prototype, "2", {
+  get: function() {
+    return 30;
+  },
+  configurable: true
+});
+
+assert.sameValue(Array.prototype.lastIndexOf.call({
+  length: 3
+}, 10), 0, 'Array.prototype.lastIndexOf.call({ length: 3 }, 10)');
+assert.sameValue(Array.prototype.lastIndexOf.call({
+  length: 3
+}, 20), 1, 'Array.prototype.lastIndexOf.call({ length: 3 }, 20)');
+assert.sameValue(Array.prototype.lastIndexOf.call({
+  length: 3
+}, 30), 2, 'Array.prototype.lastIndexOf.call({ length: 3 }, 30)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-b-i-17.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-b-i-17.js
new file mode 100644
index 0000000000..b14f5e38ee
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-b-i-17.js
@@ -0,0 +1,19 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf - element to be retrieved is own
+    accessor property without a get function on an Array
+---*/
+
+var arr = [];
+Object.defineProperty(arr, "0", {
+  set: function() {},
+  configurable: true
+});
+
+assert.sameValue(arr.lastIndexOf(undefined), 0, 'arr.lastIndexOf(undefined)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-b-i-18.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-b-i-18.js
new file mode 100644
index 0000000000..4e0b52c9b7
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-b-i-18.js
@@ -0,0 +1,21 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf - element to be retrieved is own
+    accessor property without a get function on an Array-like object
+---*/
+
+var obj = {
+  length: 1
+};
+Object.defineProperty(obj, "0", {
+  set: function() {},
+  configurable: true
+});
+
+assert.sameValue(Array.prototype.lastIndexOf.call(obj, undefined), 0, 'Array.prototype.lastIndexOf.call(obj, undefined)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-b-i-19.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-b-i-19.js
new file mode 100644
index 0000000000..c2aa8c19cb
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-b-i-19.js
@@ -0,0 +1,30 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf - element to be retrieved is own
+    accessor property without a get function that overrides an
+    inherited accessor property on an Array-like object
+---*/
+
+var obj = {
+  length: 1
+};
+
+Object.defineProperty(Object.prototype, "0", {
+  get: function() {
+    return 20;
+  },
+  configurable: true
+});
+Object.defineProperty(obj, "0", {
+  set: function() {},
+  configurable: true
+});
+
+assert(obj.hasOwnProperty(0), 'obj.hasOwnProperty(0) !== true');
+assert.sameValue(Array.prototype.lastIndexOf.call(obj, undefined), 0, 'Array.prototype.lastIndexOf.call(obj, undefined)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-b-i-2.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-b-i-2.js
new file mode 100644
index 0000000000..0d6bcdbe1b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-b-i-2.js
@@ -0,0 +1,15 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf - element to be retrieved is own data
+    property on an Array
+---*/
+
+assert.sameValue([true, true, true].lastIndexOf(true), 2, '[true, true, true].lastIndexOf(true)');
+assert.sameValue([true, true, false].lastIndexOf(true), 1, '[true, true, false].lastIndexOf(true)');
+assert.sameValue([true, false, false].lastIndexOf(true), 0, '[true, false, false].lastIndexOf(true)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-b-i-20.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-b-i-20.js
new file mode 100644
index 0000000000..9cda64323e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-b-i-20.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf - element to be retrieved is an own
+    accessor property without a get function that overrides an
+    inherited accessor property on an Array
+---*/
+
+var arr = [, 1];
+
+Object.defineProperty(Array.prototype, "0", {
+  get: function() {
+    return 100;
+  },
+  configurable: true
+});
+Object.defineProperty(arr, "0", {
+  set: function() {},
+  configurable: true
+});
+
+assert(arr.hasOwnProperty(0), 'arr.hasOwnProperty(0) !== true');
+assert.sameValue(arr.lastIndexOf(undefined), 0, 'arr.lastIndexOf(undefined)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-b-i-21.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-b-i-21.js
new file mode 100644
index 0000000000..35f9c4af84
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-b-i-21.js
@@ -0,0 +1,18 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf - element to be retrieved is inherited
+    accessor property without a get function on an Array
+---*/
+
+Object.defineProperty(Array.prototype, "0", {
+  set: function() {},
+  configurable: true
+});
+
+assert.sameValue([, ].lastIndexOf(undefined), 0, '[, ].lastIndexOf(undefined)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-b-i-22.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-b-i-22.js
new file mode 100644
index 0000000000..b870f4e856
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-b-i-22.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf - element to be retrieved is inherited
+    accessor property without a get function on an Array-like object
+---*/
+
+Object.defineProperty(Object.prototype, "0", {
+  set: function() {},
+  configurable: true
+});
+
+assert.sameValue(Array.prototype.lastIndexOf.call({
+  length: 1
+}, undefined), 0, 'Array.prototype.lastIndexOf.call({ length: 1 }, undefined)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-b-i-25.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-b-i-25.js
new file mode 100644
index 0000000000..38363b773b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-b-i-25.js
@@ -0,0 +1,19 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf applied to Arguments object which
+    implements its own property get method (number of arguments is
+    less than number of parameters)
+---*/
+
+var func = function(a, b) {
+  return 0 === Array.prototype.lastIndexOf.call(arguments, arguments[0]) &&
+    -1 === Array.prototype.lastIndexOf.call(arguments, arguments[1]);
+};
+
+assert(func(true), 'func(true) !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-b-i-26.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-b-i-26.js
new file mode 100644
index 0000000000..f3e209120c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-b-i-26.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf applied to Arguments object which
+    implements its own property get method (number of arguments equals
+    to number of parameters)
+---*/
+
+var func = function(a, b) {
+  return 0 === Array.prototype.lastIndexOf.call(arguments, arguments[0]) &&
+    1 === Array.prototype.lastIndexOf.call(arguments, arguments[1]) &&
+    -1 === Array.prototype.lastIndexOf.call(arguments, arguments[2]);
+};
+
+assert(func(0, true), 'func(0, true) !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-b-i-27.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-b-i-27.js
new file mode 100644
index 0000000000..9e8618f62c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-b-i-27.js
@@ -0,0 +1,22 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf applied to Arguments object which
+    implements its own property get method (number of arguments is
+    greater than number of parameters)
+---*/
+
+var func = function(a, b) {
+  assert.sameValue(Array.prototype.lastIndexOf.call(arguments, arguments[0]), 2);
+  assert.sameValue(Array.prototype.lastIndexOf.call(arguments, arguments[3]), 3);
+  assert.sameValue(Array.prototype.lastIndexOf.call(arguments, arguments[4]), -1);
+};
+
+(function() {
+  func(0, arguments, 0, Object.prototype);
+})();
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-b-i-28.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-b-i-28.js
new file mode 100644
index 0000000000..6002512ccc
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-b-i-28.js
@@ -0,0 +1,35 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf - side-effects are visible in
+    subsequent iterations on an Array
+---*/
+
+var preIterVisible = false;
+var arr = [];
+
+Object.defineProperty(arr, "2", {
+  get: function() {
+    preIterVisible = true;
+    return false;
+  },
+  configurable: true
+});
+
+Object.defineProperty(arr, "1", {
+  get: function() {
+    if (preIterVisible) {
+      return true;
+    } else {
+      return false;
+    }
+  },
+  configurable: true
+});
+
+assert.sameValue(arr.lastIndexOf(true), 1, 'arr.lastIndexOf(true)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-b-i-29.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-b-i-29.js
new file mode 100644
index 0000000000..8add4d3af8
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-b-i-29.js
@@ -0,0 +1,37 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf - side-effects are visible in
+    subsequent iterations on an Array-like object
+---*/
+
+var preIterVisible = false;
+var obj = {
+  length: 3
+};
+
+Object.defineProperty(obj, "2", {
+  get: function() {
+    preIterVisible = true;
+    return false;
+  },
+  configurable: true
+});
+
+Object.defineProperty(obj, "1", {
+  get: function() {
+    if (preIterVisible) {
+      return true;
+    } else {
+      return false;
+    }
+  },
+  configurable: true
+});
+
+assert.sameValue(Array.prototype.lastIndexOf.call(obj, true), 1, 'Array.prototype.lastIndexOf.call(obj, true)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-b-i-3.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-b-i-3.js
new file mode 100644
index 0000000000..9df7282978
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-b-i-3.js
@@ -0,0 +1,15 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf - element to be retrieved is own data
+    property that overrides an inherited data property on an Array
+---*/
+
+Array.prototype[0] = Object;
+
+assert.sameValue([Object.prototype].lastIndexOf(Object.prototype), 0, '[Object.prototype].lastIndexOf(Object.prototype)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-b-i-30.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-b-i-30.js
new file mode 100644
index 0000000000..15798087fd
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-b-i-30.js
@@ -0,0 +1,33 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf terminates iteration on unhandled
+    exception on an Array
+---*/
+
+var accessed = false;
+var arr = [];
+
+Object.defineProperty(arr, "2", {
+  get: function() {
+    throw new TypeError();
+  },
+  configurable: true
+});
+
+Object.defineProperty(arr, "1", {
+  get: function() {
+    accessed = true;
+    return true;
+  },
+  configurable: true
+});
+assert.throws(TypeError, function() {
+  arr.lastIndexOf(true);
+});
+assert.sameValue(accessed, false, 'accessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-b-i-31.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-b-i-31.js
new file mode 100644
index 0000000000..638b3f2537
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-b-i-31.js
@@ -0,0 +1,35 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf terminates iteration on unhandled
+    exception on an Array-like object
+---*/
+
+var accessed = false;
+var obj = {
+  length: 3
+};
+
+Object.defineProperty(obj, "2", {
+  get: function() {
+    throw new TypeError();
+  },
+  configurable: true
+});
+
+Object.defineProperty(obj, "1", {
+  get: function() {
+    accessed = true;
+    return true;
+  },
+  configurable: true
+});
+assert.throws(TypeError, function() {
+  Array.prototype.lastIndexOf.call(obj, true);
+});
+assert.sameValue(accessed, false, 'accessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-b-i-4.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-b-i-4.js
new file mode 100644
index 0000000000..9183e4d886
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-b-i-4.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf - element to be retrieved is own data
+    property that overrides an inherited data property on an
+    Array-like object
+---*/
+
+Object.prototype[0] = false;
+
+assert.sameValue(Array.prototype.lastIndexOf.call({
+  0: true,
+  1: 1,
+  length: 2
+}, true), 0, 'Array.prototype.lastIndexOf.call({ 0: true, 1: 1, length: 2 }, true)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-b-i-5.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-b-i-5.js
new file mode 100644
index 0000000000..bfabd45dfd
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-b-i-5.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf - element to be retrieved is own data
+    property that overrides an inherited accessor property on an Array
+---*/
+
+Object.defineProperty(Array.prototype, "0", {
+  get: function() {
+    return false;
+  },
+  configurable: true
+});
+
+assert.sameValue([Number].lastIndexOf(Number), 0, '[Number].lastIndexOf(Number)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-b-i-6.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-b-i-6.js
new file mode 100644
index 0000000000..fb30292d7d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-b-i-6.js
@@ -0,0 +1,25 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf - element to be retrieved is own data
+    property that overrides an inherited accessor property on an
+    Array-like object
+---*/
+
+Object.defineProperty(Object.prototype, "0", {
+  get: function() {
+    return false;
+  },
+  configurable: true
+});
+
+assert.sameValue(Array.prototype.lastIndexOf.call({
+  0: true,
+  1: 1,
+  length: 2
+}, true), 0, 'Array.prototype.lastIndexOf.call({ 0: true, 1: 1, length: 2 }, true)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-b-i-7.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-b-i-7.js
new file mode 100644
index 0000000000..1b4eb1f2f0
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-b-i-7.js
@@ -0,0 +1,19 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf - element to be retrieved is inherited
+    data property on an Array
+---*/
+
+Array.prototype[0] = true;
+Array.prototype[1] = false;
+Array.prototype[2] = "true";
+
+assert.sameValue([, , , ].lastIndexOf(true), 0, '[, , , ].lastIndexOf(true)');
+assert.sameValue([, , , ].lastIndexOf(false), 1, '[, , , ].lastIndexOf(false)');
+assert.sameValue([, , , ].lastIndexOf("true"), 2, '[, , , ].lastIndexOf("true")');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-b-i-8.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-b-i-8.js
new file mode 100644
index 0000000000..5e055929b9
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-b-i-8.js
@@ -0,0 +1,25 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf - element to be retrieved is inherited
+    data property on an Array-like object
+---*/
+
+Object.prototype[0] = true;
+Object.prototype[1] = false;
+Object.prototype[2] = "true";
+
+assert.sameValue(Array.prototype.lastIndexOf.call({
+  length: 3
+}, true), 0, 'Array.prototype.lastIndexOf.call({ length: 3 }, true)');
+assert.sameValue(Array.prototype.lastIndexOf.call({
+  length: 3
+}, false), 1, 'Array.prototype.lastIndexOf.call({ length: 3 }, false)');
+assert.sameValue(Array.prototype.lastIndexOf.call({
+  length: 3
+}, "true"), 2, 'Array.prototype.lastIndexOf.call({ length: 3 }, "true")');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-b-i-9.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-b-i-9.js
new file mode 100644
index 0000000000..89a0753d96
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-b-i-9.js
@@ -0,0 +1,37 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf - element to be retrieved is own
+    accessor property on an Array
+---*/
+
+var arr = [, , , ];
+Object.defineProperty(arr, "0", {
+  get: function() {
+    return 0;
+  },
+  configurable: true
+});
+
+Object.defineProperty(arr, "1", {
+  get: function() {
+    return 1;
+  },
+  configurable: true
+});
+
+Object.defineProperty(arr, "2", {
+  get: function() {
+    return 2;
+  },
+  configurable: true
+});
+
+assert.sameValue(arr.lastIndexOf(0), 0, 'arr.lastIndexOf(0)');
+assert.sameValue(arr.lastIndexOf(1), 1, 'arr.lastIndexOf(1)');
+assert.sameValue(arr.lastIndexOf(2), 2, 'arr.lastIndexOf(2)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-b-ii-1.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-b-ii-1.js
new file mode 100644
index 0000000000..ab569337cd
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-b-ii-1.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf - type of array element is different
+    from type of search element
+---*/
+
+assert.sameValue(["true"].lastIndexOf(true), -1, '["true"].lastIndexOf(true)');
+assert.sameValue(["0"].lastIndexOf(0), -1, '["0"].lastIndexOf(0)');
+assert.sameValue([false].lastIndexOf(0), -1, '[false].lastIndexOf(0)');
+assert.sameValue([undefined].lastIndexOf(0), -1, '[undefined].lastIndexOf(0)');
+assert.sameValue([null].lastIndexOf(0), -1, '[null].lastIndexOf(0)');
+assert.sameValue([
+  []
+].lastIndexOf(0), -1, '[[]].lastIndexOf(0)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-b-ii-10.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-b-ii-10.js
new file mode 100644
index 0000000000..5fb4e0ab8d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-b-ii-10.js
@@ -0,0 +1,13 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf - both array element and search
+    element are booleans, and they have same value
+---*/
+
+assert.sameValue([false, true].lastIndexOf(true), 1, '[false, true].lastIndexOf(true)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-b-ii-11.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-b-ii-11.js
new file mode 100644
index 0000000000..15d142a080
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-b-ii-11.js
@@ -0,0 +1,17 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf - both array element and search
+    element are Objects, and they refer to the same object
+---*/
+
+var obj1 = {};
+var obj2 = {};
+var obj3 = obj2;
+
+assert.sameValue([obj2, obj1].lastIndexOf(obj3), 0, '[obj2, obj1].lastIndexOf(obj3)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-b-ii-2.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-b-ii-2.js
new file mode 100644
index 0000000000..3c752a3b0c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-b-ii-2.js
@@ -0,0 +1,14 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf - both type of array element and type
+    of search element are Undefined
+---*/
+
+assert.sameValue([undefined].lastIndexOf(), 0, '[undefined].lastIndexOf()');
+assert.sameValue([undefined].lastIndexOf(undefined), 0, '[undefined].lastIndexOf(undefined)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-b-ii-3.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-b-ii-3.js
new file mode 100644
index 0000000000..8def039e6f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-b-ii-3.js
@@ -0,0 +1,13 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf - both type of array element and type
+    of search element are Null
+---*/
+
+assert.sameValue([null].lastIndexOf(null), 0, '[null].lastIndexOf(null)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-b-ii-4.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-b-ii-4.js
new file mode 100644
index 0000000000..5d001f88a8
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-b-ii-4.js
@@ -0,0 +1,11 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: Array.prototype.lastIndexOf - search element is NaN
+---*/
+
+assert.sameValue([+NaN, NaN, -NaN].lastIndexOf(NaN), -1, '[+NaN, NaN, -NaN].lastIndexOf(NaN)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-b-ii-5.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-b-ii-5.js
new file mode 100644
index 0000000000..5d8ced85f7
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-b-ii-5.js
@@ -0,0 +1,11 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: Array.prototype.lastIndexOf - search element is -NaN
+---*/
+
+assert.sameValue([+NaN, NaN, -NaN].lastIndexOf(-NaN), -1, '[+NaN, NaN, -NaN].lastIndexOf(-NaN)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-b-ii-6.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-b-ii-6.js
new file mode 100644
index 0000000000..c6c71dd524
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-b-ii-6.js
@@ -0,0 +1,13 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf - array element is +0 and search
+    element is -0
+---*/
+
+assert.sameValue([+0].lastIndexOf(-0), 0, '[+0].lastIndexOf(-0)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-b-ii-7.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-b-ii-7.js
new file mode 100644
index 0000000000..a52c350499
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-b-ii-7.js
@@ -0,0 +1,13 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf - array element is -0 and search
+    element is +0
+---*/
+
+assert.sameValue([-0].lastIndexOf(+0), 0, '[-0].lastIndexOf(+0)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-b-ii-8.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-b-ii-8.js
new file mode 100644
index 0000000000..5a990835d5
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-b-ii-8.js
@@ -0,0 +1,13 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf - both array element and search
+    element are numbers, and they have same value
+---*/
+
+assert.sameValue([-1, 0, 1].lastIndexOf(-1), 0, '[-1, 0, 1].lastIndexOf(-1)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-b-ii-9.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-b-ii-9.js
new file mode 100644
index 0000000000..8a175e49bb
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-b-ii-9.js
@@ -0,0 +1,14 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf - both array element and search
+    element are strings, and they have exactly the same sequence of
+    characters
+---*/
+
+assert.sameValue(["abc", "ab", "bca", ""].lastIndexOf("abc"), 0, '["abc", "ab", "bca", ""].lastIndexOf("abc")');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-b-iii-1.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-b-iii-1.js
new file mode 100644
index 0000000000..66ca31475f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-b-iii-1.js
@@ -0,0 +1,13 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf returns index of last one when more
+    than two elements in array are eligible
+---*/
+
+assert.sameValue([2, 1, 2, 2, 1].lastIndexOf(2), 3, '[2, 1, 2, 2, 1].lastIndexOf(2)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-b-iii-2.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-b-iii-2.js
new file mode 100644
index 0000000000..c84939a8b8
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-b-iii-2.js
@@ -0,0 +1,35 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf returns without visiting subsequent
+    element once search value is found
+---*/
+
+var arr = [2, 1, , 1, 2];
+var elementFirstAccessed = false;
+var elementThirdAccessed = false;
+
+Object.defineProperty(arr, "2", {
+  get: function() {
+    elementThirdAccessed = true;
+    return 2;
+  },
+  configurable: true
+});
+Object.defineProperty(arr, "0", {
+  get: function() {
+    elementFirstAccessed = true;
+    return 2;
+  },
+  configurable: true
+});
+
+arr.lastIndexOf(2);
+
+assert.sameValue(elementThirdAccessed, false, 'elementThirdAccessed');
+assert.sameValue(elementFirstAccessed, false, 'elementFirstAccessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-9-1.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-9-1.js
new file mode 100644
index 0000000000..eaa3df340e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-9-1.js
@@ -0,0 +1,29 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: Array.prototype.lastIndexOf returns -1 for elements not present
+---*/
+
+var a = new Array();
+a[100] = 1;
+a[99999] = "";
+a[10] = new Object();
+a[5555] = 5.5;
+a[123456] = "str";
+a[5] = 1E+309;
+
+assert.sameValue(a.lastIndexOf(1), 100, 'a.lastIndexOf(1)');
+assert.sameValue(a.lastIndexOf(""), 99999, 'a.lastIndexOf("")');
+assert.sameValue(a.lastIndexOf("str"), 123456, 'a.lastIndexOf("str")');
+assert.sameValue(a.lastIndexOf(5.5), 5555, 'a.lastIndexOf(5.5)');
+assert.sameValue(a.lastIndexOf(1E+309), 5, 'a.lastIndexOf(1E+309)');
+
+assert.sameValue(a.lastIndexOf(true), -1, 'a.lastIndexOf(true)');
+assert.sameValue(a.lastIndexOf(5), -1, 'a.lastIndexOf(5)');
+assert.sameValue(a.lastIndexOf("str1"), -1, 'a.lastIndexOf("str1")');
+assert.sameValue(a.lastIndexOf(null), -1, 'a.lastIndexOf(null)');
+assert.sameValue(a.lastIndexOf(new Object()), -1, 'a.lastIndexOf(new Object())');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-9-2.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-9-2.js
new file mode 100644
index 0000000000..1ad6837c0f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-9-2.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf returns -1 if 'length' is 0 and does
+    not access any other properties
+---*/
+
+var accessed = false;
+var f = {
+  length: 0
+};
+Object.defineProperty(f, "0", {
+  get: function() {
+    accessed = true;
+    return 1;
+  }
+});
+
+var i = Array.prototype.lastIndexOf.call(f, 1);
+
+
+assert.sameValue(i, -1, 'i');
+assert.sameValue(accessed, false, 'accessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/browser.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/browser.js
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/call-with-boolean.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/call-with-boolean.js
new file mode 100644
index 0000000000..22c6b91a3f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/call-with-boolean.js
@@ -0,0 +1,16 @@
+// Copyright (c) 2020 Rick Waldron.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastIndexOf
+description: Array.prototype.lastIndexOf applied to boolean primitive
+---*/
+
+assert.sameValue(Array.prototype.lastIndexOf.call(true), -1, 'Array.prototype.lastIndexOf.call(true) must return -1');
+assert.sameValue(
+  Array.prototype.lastIndexOf.call(false),
+  -1,
+  'Array.prototype.lastIndexOf.call(false) must return -1'
+);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/calls-only-has-on-prototype-after-length-zeroed.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/calls-only-has-on-prototype-after-length-zeroed.js
new file mode 100644
index 0000000000..67a77465f5
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/calls-only-has-on-prototype-after-length-zeroed.js
@@ -0,0 +1,45 @@
+// Copyright (C) 2018 André Bargull. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+  Calls [[HasProperty]] on the prototype to check for existing elements.
+info: |
+  22.1.3.15 Array.prototype.lastIndexOf ( searchElement [ , fromIndex ] )
+
+  ...
+  2. Let len be ? ToLength(? Get(O, "length")).
+  ...
+  4. If fromIndex is present, let n be ? ToInteger(fromIndex); else let n be len-1.
+  ...
+  7. Repeat, while k ≥ 0
+    a. Let kPresent be ? HasProperty(O, ! ToString(k)).
+    b. If kPresent is true, then
+      i. Let elementK be ? Get(O, ! ToString(k)).
+      ...
+includes: [proxyTrapsHelper.js]
+features: [Proxy]
+---*/
+
+var array = [5, undefined, 7];
+
+Object.setPrototypeOf(array, new Proxy(Array.prototype, allowProxyTraps({
+    has: function(t, pk) {
+        return pk in t;
+    }
+})));
+
+var fromIndex = {
+    valueOf: function() {
+        // Zero the array's length. The loop in step 8 iterates over the original
+        // length value of 100, but the only prototype MOP method which should be
+        // called is [[HasProperty]].
+        array.length = 0;
+        return 2;
+    }
+};
+
+Array.prototype.lastIndexOf.call(array, 100, fromIndex);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/fromindex-zero-conversion.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/fromindex-zero-conversion.js
new file mode 100644
index 0000000000..6ee21c9d7a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/fromindex-zero-conversion.js
@@ -0,0 +1,18 @@
+// Copyright 2016 The V8 project authors. All rights reserved.
+// This code is governed by the license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+  Return +0 when fromIndex is -0 and return index refers to the first position
+info: |
+  22.1.3.15 Array.prototype.lastIndexOf ( searchElement [ , fromIndex ] )
+
+  ...
+  5. If n ≥ 0, then
+    a. If n is -0, let k be +0; else let k be min(n, len - 1).
+  ...
+---*/
+
+assert.sameValue(1 / [true].lastIndexOf(true, -0), +Infinity);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/length-near-integer-limit.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/length-near-integer-limit.js
new file mode 100644
index 0000000000..a10493c771
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/length-near-integer-limit.js
@@ -0,0 +1,37 @@
+// Copyright (C) 2020 Alexey Shvayka. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+  Elements are found in an array-like object
+  whose "length" property is near the integer limit.
+info: |
+  Array.prototype.lastIndexOf ( searchElement [ , fromIndex ] )
+
+  1. Let O be ? ToObject(this value).
+  2. Let len be ? LengthOfArrayLike(O).
+  [...]
+  7. Repeat, while k ≥ 0
+    a. Let kPresent be ? HasProperty(O, ! ToString(k)).
+    b. If kPresent is true, then
+      i. Let elementK be ? Get(O, ! ToString(k)).
+      ii. Let same be the result of performing Strict Equality Comparison searchElement === elementK.
+      iii. If same is true, return k.
+    [...]
+---*/
+
+var el = {};
+var elIndex = Number.MAX_SAFE_INTEGER - 3;
+var fromIndex = Number.MAX_SAFE_INTEGER - 1;
+var arrayLike = {
+  length: Number.MAX_SAFE_INTEGER,
+};
+
+arrayLike[elIndex] = el;
+
+var res = Array.prototype.lastIndexOf.call(arrayLike, el, fromIndex);
+
+assert.sameValue(res, elIndex);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/length-zero-returns-minus-one.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/length-zero-returns-minus-one.js
new file mode 100644
index 0000000000..1ffa00c9a3
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/length-zero-returns-minus-one.js
@@ -0,0 +1,24 @@
+// Copyright (C) 2020 Alexey Shvayka. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+  Returns -1 if length is 0.
+info: |
+  Array.prototype.lastIndexOf ( searchElement [ , fromIndex ] )
+
+  1. Let O be ? ToObject(this value).
+  2. Let len be ? LengthOfArrayLike(O).
+  3. If len is 0, return -1.
+---*/
+
+var fromIndex = {
+  valueOf: function() {
+    throw new Test262Error("Length should be checked before ToInteger(fromIndex).");
+  },
+};
+
+assert.sameValue([].lastIndexOf(1), -1);
+assert.sameValue([].lastIndexOf(2, fromIndex), -1);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/length.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/length.js
new file mode 100644
index 0000000000..56b0fd7f8b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/length.js
@@ -0,0 +1,30 @@
+// Copyright (C) 2017 Leo Balter. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+  The "length" property of Array.prototype.lastIndexOf
+info: |
+  17 ECMAScript Standard Built-in Objects
+
+  Every built-in function object, including constructors, has a length property
+  whose value is an integer. Unless otherwise specified, this value is equal to
+  the largest number of named arguments shown in the subclause headings for the
+  function description. Optional parameters (which are indicated with brackets:
+  [ ]) or rest parameters (which are shown using the form «...name») are not
+  included in the default argument count.
+
+  Unless otherwise specified, the length property of a built-in function object
+  has the attributes { [[Writable]]: false, [[Enumerable]]: false,
+    [[Configurable]]: true }.
+includes: [propertyHelper.js]
+---*/
+
+assert.sameValue(Array.prototype.lastIndexOf.length, 1);
+
+verifyNotEnumerable(Array.prototype.lastIndexOf, 'length');
+verifyNotWritable(Array.prototype.lastIndexOf, 'length');
+verifyConfigurable(Array.prototype.lastIndexOf, 'length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/name.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/name.js
new file mode 100644
index 0000000000..1ab52079e3
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/name.js
@@ -0,0 +1,28 @@
+// Copyright (C) 2015 André Bargull. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+  Array.prototype.lastIndexOf.name is "lastIndexOf".
+info: |
+  Array.prototype.lastIndexOf ( searchElement [ , fromIndex ] )
+
+  17 ECMAScript Standard Built-in Objects:
+    Every built-in Function object, including constructors, that is not
+    identified as an anonymous function has a name property whose value
+    is a String.
+
+    Unless otherwise specified, the name property of a built-in Function
+    object, if it exists, has the attributes { [[Writable]]: false,
+    [[Enumerable]]: false, [[Configurable]]: true }.
+includes: [propertyHelper.js]
+---*/
+
+assert.sameValue(Array.prototype.lastIndexOf.name, "lastIndexOf");
+
+verifyNotEnumerable(Array.prototype.lastIndexOf, "name");
+verifyNotWritable(Array.prototype.lastIndexOf, "name");
+verifyConfigurable(Array.prototype.lastIndexOf, "name");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/not-a-constructor.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/not-a-constructor.js
new file mode 100644
index 0000000000..e3d126b8f9
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/not-a-constructor.js
@@ -0,0 +1,35 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Array.prototype.lastIndexOf does not implement [[Construct]], is not new-able
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+
+  sec-evaluatenew
+
+  ...
+  7. If IsConstructor(constructor) is false, throw a TypeError exception.
+  ...
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Array.prototype.lastIndexOf),
+  false,
+  'isConstructor(Array.prototype.lastIndexOf) must return false'
+);
+
+assert.throws(TypeError, () => {
+  new Array.prototype.lastIndexOf();
+}, '`new Array.prototype.lastIndexOf()` throws TypeError');
+
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/prop-desc.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/prop-desc.js
new file mode 100644
index 0000000000..8b70501c5b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/prop-desc.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2017 Leo Balter. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+  "lastIndexOf" property of Array.prototype
+info: |
+  17 ECMAScript Standard Built-in Objects
+  
+  Every other data property described in clauses 18 through 26 and in Annex B.2
+  has the attributes { [[Writable]]: true, [[Enumerable]]: false,
+    [[Configurable]]: true } unless otherwise specified.
+includes: [propertyHelper.js]
+---*/
+
+assert.sameValue(typeof Array.prototype.lastIndexOf, 'function', 'typeof');
+
+verifyNotEnumerable(Array.prototype, "lastIndexOf");
+verifyWritable(Array.prototype, "lastIndexOf");
+verifyConfigurable(Array.prototype, "lastIndexOf");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/shell.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/shell.js
new file mode 100644
index 0000000000..bc72493f03
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/shell.js
@@ -0,0 +1,33 @@
+// GENERATED, DO NOT EDIT
+// file: proxyTrapsHelper.js
+// Copyright (C) 2016 Jordan Harband.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+description: |
+    Used to assert the correctness of object behavior in the presence
+    and context of Proxy objects.
+defines: [allowProxyTraps]
+---*/
+
+function allowProxyTraps(overrides) {
+  function throwTest262Error(msg) {
+    return function () { throw new Test262Error(msg); };
+  }
+  if (!overrides) { overrides = {}; }
+  return {
+    getPrototypeOf: overrides.getPrototypeOf || throwTest262Error('[[GetPrototypeOf]] trap called'),
+    setPrototypeOf: overrides.setPrototypeOf || throwTest262Error('[[SetPrototypeOf]] trap called'),
+    isExtensible: overrides.isExtensible || throwTest262Error('[[IsExtensible]] trap called'),
+    preventExtensions: overrides.preventExtensions || throwTest262Error('[[PreventExtensions]] trap called'),
+    getOwnPropertyDescriptor: overrides.getOwnPropertyDescriptor || throwTest262Error('[[GetOwnProperty]] trap called'),
+    has: overrides.has || throwTest262Error('[[HasProperty]] trap called'),
+    get: overrides.get || throwTest262Error('[[Get]] trap called'),
+    set: overrides.set || throwTest262Error('[[Set]] trap called'),
+    deleteProperty: overrides.deleteProperty || throwTest262Error('[[Delete]] trap called'),
+    defineProperty: overrides.defineProperty || throwTest262Error('[[DefineOwnProperty]] trap called'),
+    enumerate: throwTest262Error('[[Enumerate]] trap called: this trap has been removed'),
+    ownKeys: overrides.ownKeys || throwTest262Error('[[OwnPropertyKeys]] trap called'),
+    apply: overrides.apply || throwTest262Error('[[Call]] trap called'),
+    construct: overrides.construct || throwTest262Error('[[Construct]] trap called')
+  };
+}
diff --git a/js/src/tests/test262/built-ins/Array/prototype/length.js b/js/src/tests/test262/built-ins/Array/prototype/length.js
new file mode 100644
index 0000000000..914fb17f83
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/length.js
@@ -0,0 +1,26 @@
+// Copyright (C) 2017 Leo Balter. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-properties-of-the-array-prototype-object
+description: >
+  Array.prototype has a length property
+info: |
+  22.1.3 Properties of the Array Prototype Object
+  
+  The Array prototype object is the intrinsic object %ArrayPrototype%. The Array
+  prototype object is an Array exotic object and has the internal methods specified
+  for such objects. It has a length property whose initial value is 0 and whose
+  attributes are { [[Writable]]: true, [[Enumerable]]: false, [[Configurable]]:
+    false }.
+includes: [propertyHelper.js]
+---*/
+
+assert.sameValue(Array.prototype.length, 0);
+
+verifyNotEnumerable(Array.prototype, 'length');
+// specify the value so it avoids a RangeError while setting the length
+verifyWritable(Array.prototype, 'length', false, 42);
+verifyNotConfigurable(Array.prototype, 'length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-1-1.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-1-1.js
new file mode 100644
index 0000000000..0ea571497b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-1-1.js
@@ -0,0 +1,14 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: Array.prototype.map - applied to undefined
+---*/
+
+
+assert.throws(TypeError, function() {
+  Array.prototype.map.call(undefined); // TypeError is thrown if value is undefined
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-1-10.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-1-10.js
new file mode 100644
index 0000000000..c1552a42a4
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-1-10.js
@@ -0,0 +1,19 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: Array.prototype.map - applied to the Math object
+---*/
+
+function callbackfn(val, idx, obj) {
+  return ('[object Math]' === Object.prototype.toString.call(obj));
+}
+
+Math.length = 1;
+Math[0] = 1;
+var testResult = Array.prototype.map.call(Math, callbackfn);
+
+assert.sameValue(testResult[0], true, 'testResult[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-1-11.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-1-11.js
new file mode 100644
index 0000000000..5f7f0c64ae
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-1-11.js
@@ -0,0 +1,21 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: Array.prototype.map - applied to Date object
+---*/
+
+function callbackfn(val, idx, obj) {
+  return obj instanceof Date;
+}
+
+var obj = new Date();
+obj.length = 1;
+obj[0] = 1;
+
+var testResult = Array.prototype.map.call(obj, callbackfn);
+
+assert.sameValue(testResult[0], true, 'testResult[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-1-12.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-1-12.js
new file mode 100644
index 0000000000..62a271b906
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-1-12.js
@@ -0,0 +1,21 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: Array.prototype.map - applied to RegExp object
+---*/
+
+function callbackfn(val, idx, obj) {
+  return obj instanceof RegExp;
+}
+
+var obj = new RegExp();
+obj.length = 1;
+obj[0] = 1;
+
+var testResult = Array.prototype.map.call(obj, callbackfn);
+
+assert.sameValue(testResult[0], true, 'testResult[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-1-13.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-1-13.js
new file mode 100644
index 0000000000..a975a4db11
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-1-13.js
@@ -0,0 +1,19 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: Array.prototype.map - applied to the JSON object
+---*/
+
+function callbackfn(val, idx, obj) {
+  return ('[object JSON]' === Object.prototype.toString.call(obj));
+}
+
+JSON.length = 1;
+JSON[0] = 1;
+var testResult = Array.prototype.map.call(JSON, callbackfn);
+
+assert.sameValue(testResult[0], true, 'testResult[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-1-14.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-1-14.js
new file mode 100644
index 0000000000..7213155ad6
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-1-14.js
@@ -0,0 +1,21 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: Array.prototype.map - applied to Error object
+---*/
+
+function callbackfn(val, idx, obj) {
+  return obj instanceof Error;
+}
+
+var obj = new Error();
+obj.length = 1;
+obj[0] = 1;
+
+var testResult = Array.prototype.map.call(obj, callbackfn);
+
+assert.sameValue(testResult[0], true, 'testResult[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-1-15.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-1-15.js
new file mode 100644
index 0000000000..c04d46aa56
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-1-15.js
@@ -0,0 +1,21 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: Array.prototype.map - applied to the Arguments object
+---*/
+
+function callbackfn(val, idx, obj) {
+  return ('[object Arguments]' === Object.prototype.toString.call(obj));
+}
+
+var obj = (function() {
+  return arguments;
+}("a", "b"));
+
+var testResult = Array.prototype.map.call(obj, callbackfn);
+
+assert.sameValue(testResult[1], true, 'testResult[1]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-1-2.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-1-2.js
new file mode 100644
index 0000000000..ebabd9732b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-1-2.js
@@ -0,0 +1,14 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: Array.prototype.map - applied to null
+---*/
+
+
+assert.throws(TypeError, function() {
+  Array.prototype.map.call(null); // TypeError is thrown if value is null
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-1-3.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-1-3.js
new file mode 100644
index 0000000000..542cda123c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-1-3.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: Array.prototype.map - applied to boolean primitive
+---*/
+
+function callbackfn(val, idx, obj) {
+  return obj instanceof Boolean;
+}
+
+Boolean.prototype[0] = true;
+Boolean.prototype.length = 1;
+
+var testResult = Array.prototype.map.call(false, callbackfn);
+
+assert.sameValue(testResult[0], true, 'testResult[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-1-4.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-1-4.js
new file mode 100644
index 0000000000..443d496a32
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-1-4.js
@@ -0,0 +1,23 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: Array.prototype.map - applied to Boolean object
+---*/
+
+function callbackfn(val, idx, obj) {
+  return obj instanceof Boolean;
+}
+
+var obj = new Boolean(true);
+obj.length = 2;
+obj[0] = 11;
+obj[1] = 12;
+
+var testResult = Array.prototype.map.call(obj, callbackfn);
+
+assert.sameValue(testResult[0], true, 'testResult[0]');
+assert.sameValue(testResult[1], true, 'testResult[1]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-1-5.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-1-5.js
new file mode 100644
index 0000000000..aa0df3adde
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-1-5.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: Array.prototype.map - applied to number primitive
+---*/
+
+function callbackfn(val, idx, obj) {
+  return obj instanceof Number;
+}
+
+Number.prototype[0] = 1;
+Number.prototype.length = 1;
+
+var testResult = Array.prototype.map.call(2.5, callbackfn);
+
+assert.sameValue(testResult[0], true, 'testResult[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-1-6.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-1-6.js
new file mode 100644
index 0000000000..196afbf53e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-1-6.js
@@ -0,0 +1,23 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: Array.prototype.map - applied to Number object
+---*/
+
+function callbackfn(val, idx, obj) {
+  return obj instanceof Number;
+}
+
+var obj = new Number(-128);
+obj.length = 2;
+obj[0] = 11;
+obj[1] = 12;
+
+var testResult = Array.prototype.map.call(obj, callbackfn);
+
+assert.sameValue(testResult[0], true, 'testResult[0]');
+assert.sameValue(testResult[1], true, 'testResult[1]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-1-7.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-1-7.js
new file mode 100644
index 0000000000..52414c52bb
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-1-7.js
@@ -0,0 +1,19 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: Array.prototype.map - applied to string primitive
+---*/
+
+function callbackfn(val, idx, obj) {
+  return obj instanceof String;
+}
+
+var testResult = Array.prototype.map.call("abc", callbackfn);
+
+assert.sameValue(testResult[0], true, 'testResult[0]');
+assert.sameValue(testResult[1], true, 'testResult[1]');
+assert.sameValue(testResult[2], true, 'testResult[2]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-1-8.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-1-8.js
new file mode 100644
index 0000000000..48a3518958
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-1-8.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: Array.prototype.map - applied to String object
+---*/
+
+function callbackfn(val, idx, obj) {
+  return obj instanceof String;
+}
+
+var obj = new String("abc");
+var testResult = Array.prototype.map.call(obj, callbackfn);
+
+assert.sameValue(testResult[0], true, 'testResult[0]');
+assert.sameValue(testResult[1], true, 'testResult[1]');
+assert.sameValue(testResult[2], true, 'testResult[2]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-1-9.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-1-9.js
new file mode 100644
index 0000000000..748536314b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-1-9.js
@@ -0,0 +1,24 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: Array.prototype.map - applied to Function object
+---*/
+
+function callbackfn(val, idx, obj) {
+  return obj instanceof Function;
+}
+
+var obj = function(a, b) {
+  return a + b;
+};
+obj[0] = 11;
+obj[1] = 9;
+
+var testResult = Array.prototype.map.call(obj, callbackfn);
+
+assert.sameValue(testResult[0], true, 'testResult[0]');
+assert.sameValue(testResult[1], true, 'testResult[1]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-2-1.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-2-1.js
new file mode 100644
index 0000000000..9709ade6e1
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-2-1.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: >
+    Array.prototype.map - applied to Array-like object when 'length'
+    is an own data property
+---*/
+
+function callbackfn(val, idx, obj) {
+  return val > 10;
+}
+
+var obj = {
+  0: 12,
+  1: 11,
+  2: 9,
+  length: 2
+};
+
+var testResult = Array.prototype.map.call(obj, callbackfn);
+
+assert.sameValue(testResult.length, 2, 'testResult.length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-2-10.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-2-10.js
new file mode 100644
index 0000000000..b535c59f80
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-2-10.js
@@ -0,0 +1,36 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: >
+    Array.prototype.map - applied to Array-like object, 'length' is an
+    inherited accessor property
+---*/
+
+function callbackfn(val, idx, obj) {
+  return val > 10;
+}
+
+var proto = {};
+
+Object.defineProperty(proto, "length", {
+  get: function() {
+    return 2;
+  },
+  configurable: true
+});
+
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+child[0] = 12;
+child[1] = 11;
+child[2] = 9;
+
+var testResult = Array.prototype.map.call(child, callbackfn);
+
+assert.sameValue(testResult.length, 2, 'testResult.length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-2-11.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-2-11.js
new file mode 100644
index 0000000000..c11e5a4438
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-2-11.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: >
+    Array.prototype.map - applied to Array-like object when 'length'
+    is an own accessor property without a get function
+---*/
+
+function callbackfn(val, idx, obj) {
+  return val > 10;
+}
+
+var obj = {
+  0: 11,
+  1: 12
+};
+Object.defineProperty(obj, "length", {
+  set: function() {},
+  configurable: true
+});
+
+var testResult = Array.prototype.map.call(obj, callbackfn);
+
+assert.sameValue(testResult.length, 0, 'testResult.length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-2-12.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-2-12.js
new file mode 100644
index 0000000000..3bf9d64a9d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-2-12.js
@@ -0,0 +1,36 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: >
+    Array.prototype.map - applied to the Array-like object when
+    'length' is own accessor property without a get function that
+    overrides an inherited accessor property
+---*/
+
+function callbackfn(val, idx, obj) {
+  return val > 10;
+}
+
+Object.defineProperty(Object.prototype, "length", {
+  get: function() {
+    return 2;
+  },
+  configurable: true
+});
+
+var obj = {
+  0: 12,
+  1: 11
+};
+Object.defineProperty(obj, "length", {
+  set: function() {},
+  configurable: true
+});
+
+var testResult = Array.prototype.map.call(obj, callbackfn);
+
+assert.sameValue(testResult.length, 0, 'testResult.length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-2-13.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-2-13.js
new file mode 100644
index 0000000000..d1353167d5
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-2-13.js
@@ -0,0 +1,32 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: >
+    Array.prototype.map - applied to the Array-like object when
+    'length' is inherited accessor property without a get function
+---*/
+
+function callbackfn(val, idx, obj) {
+  return val > 10;
+}
+
+var proto = {};
+Object.defineProperty(proto, "length", {
+  set: function() {},
+  configurable: true
+});
+
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+child[0] = 11;
+child[1] = 12;
+
+var testResult = Array.prototype.map.call(child, callbackfn);
+
+assert.sameValue(testResult.length, 0, 'testResult.length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-2-14.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-2-14.js
new file mode 100644
index 0000000000..932391c1d1
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-2-14.js
@@ -0,0 +1,24 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: >
+    Array.prototype.map - applied to the Array-like object that
+    'length' property doesn't exist
+---*/
+
+function callbackfn(val, idx, obj) {
+  return val > 10;
+}
+
+var obj = {
+  0: 11,
+  1: 12
+};
+
+var testResult = Array.prototype.map.call(obj, callbackfn);
+
+assert.sameValue(testResult.length, 0, 'testResult.length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-2-17.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-2-17.js
new file mode 100644
index 0000000000..8e2f1fa94d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-2-17.js
@@ -0,0 +1,23 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: >
+    Array.prototype.map - applied to Arguments object, which
+    implements its own property get method
+---*/
+
+function callbackfn(val, idx, obj) {
+  return val > 10;
+}
+
+var func = function(a, b) {
+  return Array.prototype.map.call(arguments, callbackfn);
+};
+
+var testResult = func(12, 11);
+
+assert.sameValue(testResult.length, 2, 'testResult.length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-2-18.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-2-18.js
new file mode 100644
index 0000000000..49a86d8de0
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-2-18.js
@@ -0,0 +1,22 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: >
+    Array.prototype.map - applied to String object, which implements
+    its own property get method
+---*/
+
+function callbackfn(val, idx, obj) {
+  return parseInt(val, 10) > 1;
+}
+
+var str = new String("432");
+
+String.prototype[3] = "1";
+var testResult = Array.prototype.map.call(str, callbackfn);
+
+assert.sameValue(testResult.length, 3, 'testResult.length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-2-19.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-2-19.js
new file mode 100644
index 0000000000..5661fd2d23
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-2-19.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: >
+    Array.prototype.map - applied to Function object, which implements
+    its own property get method
+---*/
+
+function callbackfn(val, idx, obj) {
+  return val > 10;
+}
+
+var fun = function(a, b) {
+  return a + b;
+};
+fun[0] = 12;
+fun[1] = 11;
+fun[2] = 9;
+
+var testResult = Array.prototype.map.call(fun, callbackfn);
+
+assert.sameValue(testResult.length, 2, 'testResult.length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-2-2.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-2-2.js
new file mode 100644
index 0000000000..d049873a78
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-2-2.js
@@ -0,0 +1,19 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: >
+    Array.prototype.map - when 'length' is own data property on an
+    Array
+---*/
+
+function callbackfn(val, idx, obj) {
+  return val > 10;
+}
+
+var testResult = [12, 11].map(callbackfn);
+
+assert.sameValue(testResult.length, 2, 'testResult.length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-2-3.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-2-3.js
new file mode 100644
index 0000000000..7b634b713f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-2-3.js
@@ -0,0 +1,32 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: >
+    Array.prototype.map - applied to Array-like object, 'length' is an
+    own data property that overrides an inherited data property
+---*/
+
+function callbackfn(val, idx, obj) {
+  return val > 10;
+}
+
+var proto = {
+  length: 3
+};
+
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+child.length = 2;
+child[0] = 12;
+child[1] = 11;
+child[2] = 9;
+
+var testResult = Array.prototype.map.call(child, callbackfn);
+
+assert.sameValue(testResult.length, 2, 'testResult.length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-2-4.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-2-4.js
new file mode 100644
index 0000000000..21a362c330
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-2-4.js
@@ -0,0 +1,22 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: >
+    Array.prototype.map - when 'length' is own data property that
+    overrides an inherited data property on an Array
+---*/
+
+function callbackfn(val, idx, obj) {
+  return val > 10;
+}
+var arrProtoLen;
+
+arrProtoLen = Array.prototype.length;
+Array.prototype.length = 0;
+var testResult = [12, 11].map(callbackfn);
+
+assert.sameValue(testResult.length, 2, 'testResult.length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-2-5.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-2-5.js
new file mode 100644
index 0000000000..3ff3707018
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-2-5.js
@@ -0,0 +1,40 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: >
+    Array.prototype.map - applied to Array-like object, 'length' is an
+    own data property that overrides an inherited accessor property
+---*/
+
+function callbackfn(val, idx, obj) {
+  return val > 10;
+}
+
+var proto = {};
+
+Object.defineProperty(proto, "length", {
+  get: function() {
+    return 3;
+  },
+  configurable: true
+});
+
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+Object.defineProperty(child, "length", {
+  value: 2,
+  configurable: true
+});
+child[0] = 12;
+child[1] = 11;
+child[2] = 9;
+
+var testResult = Array.prototype.map.call(child, callbackfn);
+
+assert.sameValue(testResult.length, 2, 'testResult.length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-2-6.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-2-6.js
new file mode 100644
index 0000000000..d23fac2644
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-2-6.js
@@ -0,0 +1,31 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: >
+    Array.prototype.map - applied to Array-like object, 'length' is an
+    inherited data property
+---*/
+
+function callbackfn(val, idx, obj) {
+  return val > 10;
+}
+
+var proto = {
+  length: 2
+};
+
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+child[0] = 12;
+child[1] = 11;
+child[2] = 9;
+
+var testResult = Array.prototype.map.call(child, callbackfn);
+
+assert.sameValue(testResult.length, 2, 'testResult.length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-2-7.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-2-7.js
new file mode 100644
index 0000000000..8e0399588a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-2-7.js
@@ -0,0 +1,32 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: >
+    Array.prototype.map - applied to Array-like object, 'length' is an
+    own accessor property
+---*/
+
+function callbackfn(val, idx, obj) {
+  return val > 10;
+}
+
+var obj = {};
+
+Object.defineProperty(obj, "length", {
+  get: function() {
+    return 2;
+  },
+  configurable: true
+});
+
+obj[0] = 12;
+obj[1] = 11;
+obj[2] = 9;
+
+var testResult = Array.prototype.map.call(obj, callbackfn);
+
+assert.sameValue(testResult.length, 2, 'testResult.length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-2-8.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-2-8.js
new file mode 100644
index 0000000000..4a7c16f961
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-2-8.js
@@ -0,0 +1,39 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: >
+    Array.prototype.map - applied to Array-like object, 'length' is an
+    own accessor property that overrides an inherited data property
+---*/
+
+function callbackfn(val, idx, obj) {
+  return val > 10;
+}
+
+var proto = {
+  length: 3
+};
+
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+
+Object.defineProperty(child, "length", {
+  get: function() {
+    return 2;
+  },
+  configurable: true
+});
+
+child[0] = 12;
+child[1] = 11;
+child[2] = 9;
+
+var testResult = Array.prototype.map.call(child, callbackfn);
+
+assert.sameValue(testResult.length, 2, 'testResult.length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-2-9.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-2-9.js
new file mode 100644
index 0000000000..2201158d2e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-2-9.js
@@ -0,0 +1,45 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: >
+    Array.prototype.map - applied to Array-like object when 'length'
+    is an own accessor property that overrides an inherited accessor
+    property
+---*/
+
+function callbackfn(val, idx, obj) {
+  return val > 10;
+}
+
+var proto = {};
+
+Object.defineProperty(proto, "length", {
+  get: function() {
+    return 3;
+  },
+  configurable: true
+});
+
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+
+Object.defineProperty(child, "length", {
+  get: function() {
+    return 2;
+  },
+  configurable: true
+});
+
+child[0] = 12;
+child[1] = 11;
+child[2] = 9;
+
+var testResult = Array.prototype.map.call(child, callbackfn);
+
+assert.sameValue(testResult.length, 2, 'testResult.length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-3-1.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-3-1.js
new file mode 100644
index 0000000000..e1cf01f40b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-3-1.js
@@ -0,0 +1,21 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: Array.prototype.map - value of 'length' is undefined
+---*/
+
+function callbackfn(val, idx, obj) {
+  return val > 10;
+}
+
+var obj = {
+  length: undefined
+};
+
+var newArr = Array.prototype.map.call(obj, callbackfn);
+
+assert.sameValue(newArr.length, 0, 'newArr.length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-3-10.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-3-10.js
new file mode 100644
index 0000000000..45011bb9e3
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-3-10.js
@@ -0,0 +1,22 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: Array.prototype.map - value of 'length' is a number (value is NaN)
+---*/
+
+function callbackfn(val, idx, obj) {
+  return val < 10;
+}
+
+var obj = {
+  0: 9,
+  length: NaN
+};
+
+var newArr = Array.prototype.map.call(obj, callbackfn);
+
+assert.sameValue(newArr.length, 0, 'newArr.length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-3-11.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-3-11.js
new file mode 100644
index 0000000000..325b31daf0
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-3-11.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: >
+    Array.prototype.map - 'length' is a string containing a positive
+    number
+---*/
+
+function callbackfn(val, idx, obj) {
+  return val < 10;
+}
+
+var obj = {
+  0: 11,
+  1: 9,
+  2: 12,
+  length: "2"
+};
+
+var newArr = Array.prototype.map.call(obj, callbackfn);
+
+assert.sameValue(newArr.length, 2, 'newArr.length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-3-12.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-3-12.js
new file mode 100644
index 0000000000..81839023c8
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-3-12.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: >
+    Array.prototype.map - 'length' is a string containing a negative
+    number
+---*/
+
+function callbackfn(val, idx, obj) {
+  return val < 10;
+}
+
+var obj = {
+  0: 11,
+  1: 9,
+  2: 12,
+  length: "-4294967294"
+};
+
+var newArr = Array.prototype.map.call(obj, callbackfn);
+
+assert.sameValue(newArr.length, 0, 'newArr.length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-3-13.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-3-13.js
new file mode 100644
index 0000000000..34057ca1b7
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-3-13.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: >
+    Array.prototype.map - value of 'length' is string that is able to
+    convert to number primitive (value is a decimal number)
+---*/
+
+function callbackfn(val, idx, obj) {
+  return val < 10;
+}
+
+var obj = {
+  0: 11,
+  1: 9,
+  2: 12,
+  length: "2.5"
+};
+
+var newArr = Array.prototype.map.call(obj, callbackfn);
+
+assert.sameValue(newArr.length, 2, 'newArr.length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-3-14.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-3-14.js
new file mode 100644
index 0000000000..40bce0b805
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-3-14.js
@@ -0,0 +1,21 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: Array.prototype.map - 'length' is a string containing Infinity
+---*/
+
+function callbackfn(val, idx, obj) {
+  return val < 10;
+}
+
+var obj = {
+  0: 9,
+  length: "Infinity"
+};
+assert.throws(RangeError, function() {
+  Array.prototype.map.call(obj, callbackfn);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-3-15.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-3-15.js
new file mode 100644
index 0000000000..63f9784f40
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-3-15.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: >
+    Array.prototype.map - 'length' is a string containing an
+    exponential number
+---*/
+
+function callbackfn(val, idx, obj) {
+  return val < 10;
+}
+
+var obj = {
+  0: 11,
+  1: 9,
+  2: 12,
+  length: "2E0"
+};
+
+var newArr = Array.prototype.map.call(obj, callbackfn);
+
+assert.sameValue(newArr.length, 2, 'newArr.length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-3-16.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-3-16.js
new file mode 100644
index 0000000000..3a07eb3ca9
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-3-16.js
@@ -0,0 +1,24 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: Array.prototype.map - 'length' is a string containing a hex number
+---*/
+
+function callbackfn(val, idx, obj) {
+  return val < 10;
+}
+
+var obj = {
+  0: 11,
+  1: 9,
+  2: 12,
+  length: "0x0002"
+};
+
+var newArr = Array.prototype.map.call(obj, callbackfn);
+
+assert.sameValue(newArr.length, 2, 'newArr.length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-3-17.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-3-17.js
new file mode 100644
index 0000000000..af377162ae
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-3-17.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: >
+    Array.prototype.map - when 'length' is a string containing a
+    number with leading zeros
+---*/
+
+function callbackfn(val, idx, obj) {
+  return val < 10;
+}
+
+var obj = {
+  0: 11,
+  1: 9,
+  2: 12,
+  length: "0002.00"
+};
+
+var newArr = Array.prototype.map.call(obj, callbackfn);
+
+assert.sameValue(newArr.length, 2, 'newArr.length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-3-18.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-3-18.js
new file mode 100644
index 0000000000..88f21dd26e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-3-18.js
@@ -0,0 +1,23 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: >
+    Array.prototype.map - value of 'length' is a string that can't
+    convert to a number
+---*/
+
+function callbackfn(val, idx, obj) {
+  return val > 10;
+}
+
+var obj = {
+  length: "asdf!_"
+};
+
+var newArr = Array.prototype.map.call(obj, callbackfn);
+
+assert.sameValue(newArr.length, 0, 'newArr.length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-3-19.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-3-19.js
new file mode 100644
index 0000000000..8db50263ec
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-3-19.js
@@ -0,0 +1,30 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: >
+    Array.prototype.map - value of 'length' is an Object which has an
+    own toString method
+---*/
+
+function callbackfn(val, idx, obj) {
+  return val < 10;
+}
+
+var obj = {
+  0: 11,
+  1: 9,
+
+  length: {
+    toString: function() {
+      return '2';
+    }
+  }
+};
+
+var newArr = Array.prototype.map.call(obj, callbackfn);
+
+assert.sameValue(newArr.length, 2, 'newArr.length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-3-2.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-3-2.js
new file mode 100644
index 0000000000..b22cf94134
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-3-2.js
@@ -0,0 +1,24 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: >
+    Array.prototype.map on an Array-like object if 'length' is 1
+    (length overridden to true(type conversion))
+---*/
+
+function callbackfn(val, idx, obj) {
+  return val > 10;
+}
+
+var obj = {
+  0: 11,
+  length: true
+};
+
+var newArr = Array.prototype.map.call(obj, callbackfn);
+
+assert.sameValue(newArr.length, 1, 'newArr.length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-3-20.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-3-20.js
new file mode 100644
index 0000000000..d8d3139101
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-3-20.js
@@ -0,0 +1,30 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: >
+    Array.prototype.map - value of 'length' is an Object which has an
+    own valueOf method
+---*/
+
+function callbackfn(val, idx, obj) {
+  return val < 10;
+}
+
+var obj = {
+  0: 11,
+  1: 9,
+
+  length: {
+    valueOf: function() {
+      return 2;
+    }
+  }
+};
+
+var newArr = Array.prototype.map.call(obj, callbackfn);
+
+assert.sameValue(newArr.length, 2, 'newArr.length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-3-21.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-3-21.js
new file mode 100644
index 0000000000..a42cd67a1e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-3-21.js
@@ -0,0 +1,40 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: >
+    Array.prototype.map - 'length' is an object that has an own
+    valueOf method that returns an object and toString method that
+    returns a string
+---*/
+
+function callbackfn(val, idx, obj) {
+  return val < 10;
+}
+
+var firstStepOccured = false;
+var secondStepOccured = false;
+var obj = {
+  0: 11,
+  1: 9,
+
+  length: {
+    valueOf: function() {
+      firstStepOccured = true;
+      return {};
+    },
+    toString: function() {
+      secondStepOccured = true;
+      return '2';
+    }
+  }
+};
+
+var newArr = Array.prototype.map.call(obj, callbackfn);
+
+assert.sameValue(newArr.length, 2, 'newArr.length');
+assert(firstStepOccured, 'firstStepOccured !== true');
+assert(secondStepOccured, 'secondStepOccured !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-3-22.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-3-22.js
new file mode 100644
index 0000000000..d30ac3af39
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-3-22.js
@@ -0,0 +1,33 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: >
+    Array.prototype.map throws TypeError exception when 'length' is an
+    object with toString and valueOf methods that don�t return
+    primitive values
+---*/
+
+function callbackfn(val, idx, obj) {
+  return val > 10;
+}
+
+var obj = {
+  1: 11,
+  2: 12,
+
+  length: {
+    valueOf: function() {
+      return {};
+    },
+    toString: function() {
+      return {};
+    }
+  }
+};
+assert.throws(TypeError, function() {
+  Array.prototype.map.call(obj, callbackfn);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-3-23.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-3-23.js
new file mode 100644
index 0000000000..1191410b6c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-3-23.js
@@ -0,0 +1,47 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: >
+    Array.prototype.map uses inherited valueOf method when 'length' is
+    an object with an own toString and inherited valueOf methods
+---*/
+
+function callbackfn(val, idx, obj) {
+  return val < 10;
+}
+
+var valueOfAccessed = false;
+var toStringAccessed = false;
+
+var proto = {
+  valueOf: function() {
+    valueOfAccessed = true;
+    return 2;
+  }
+};
+
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+
+child.toString = function() {
+  toStringAccessed = true;
+  return '1';
+};
+
+var obj = {
+  0: 11,
+  1: 9,
+  length: child
+};
+
+var newArr = Array.prototype.map.call(obj, callbackfn);
+
+assert.sameValue(newArr.length, 2, 'newArr.length');
+assert(valueOfAccessed, 'valueOfAccessed !== true');
+assert.sameValue(toStringAccessed, false, 'toStringAccessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-3-24.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-3-24.js
new file mode 100644
index 0000000000..1e3c720dc2
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-3-24.js
@@ -0,0 +1,25 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: >
+    Array.prototype.map - value of 'length' is a positive non-integer,
+    ensure truncation occurs in the proper direction
+---*/
+
+function callbackfn(val, idx, obj) {
+  return val < 10;
+}
+
+var obj = {
+  0: 11,
+  1: 9,
+  length: 2.685
+};
+
+var newArr = Array.prototype.map.call(obj, callbackfn);
+
+assert.sameValue(newArr.length, 2, 'newArr.length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-3-25.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-3-25.js
new file mode 100644
index 0000000000..c06e0a27cd
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-3-25.js
@@ -0,0 +1,23 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: Array.prototype.map - value of 'length' is a negative non-integer
+---*/
+
+function callbackfn(val, idx, obj) {
+  return val < 10;
+}
+
+var obj = {
+  0: 11,
+  1: 9,
+  length: -4294967294.5
+};
+
+var newArr = Array.prototype.map.call(obj, callbackfn);
+
+assert.sameValue(newArr.length, 0, 'newArr.length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-3-28.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-3-28.js
new file mode 100644
index 0000000000..0af3c40eff
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-3-28.js
@@ -0,0 +1,21 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: Array.prototype.map - value of 'length' is boundary value (2^32)
+---*/
+
+function callbackfn(val, idx, obj) {
+  return val > 10;
+}
+
+var obj = {
+  0: 12,
+  length: 4294967296
+};
+assert.throws(RangeError, function() {
+  var newArr = Array.prototype.map.call(obj, callbackfn);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-3-29.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-3-29.js
new file mode 100644
index 0000000000..f836bb3de6
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-3-29.js
@@ -0,0 +1,24 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: >
+    Array.prototype.map - value of 'length' is boundary value (2^32 +
+    1)
+---*/
+
+function callbackfn(val, idx, obj) {
+  return val > 10;
+}
+
+var obj = {
+  0: 11,
+  1: 9,
+  length: 4294967297
+};
+assert.throws(RangeError, function() {
+  var newArr = Array.prototype.map.call(obj, callbackfn);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-3-3.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-3-3.js
new file mode 100644
index 0000000000..b789a59aa9
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-3-3.js
@@ -0,0 +1,22 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: Array.prototype.map - value of 'length' is a number (value is 0)
+---*/
+
+function callbackfn(val, idx, obj) {
+  return val > 10;
+}
+
+var obj = {
+  0: 11,
+  length: 0
+};
+
+var newArr = Array.prototype.map.call(obj, callbackfn);
+
+assert.sameValue(newArr.length, 0, 'newArr.length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-3-4.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-3-4.js
new file mode 100644
index 0000000000..02f5960536
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-3-4.js
@@ -0,0 +1,22 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: Array.prototype.map - value of 'length' is a number (value is +0)
+---*/
+
+function callbackfn(val, idx, obj) {
+  return val > 10;
+}
+
+var obj = {
+  0: 11,
+  length: +0
+};
+
+var newArr = Array.prototype.map.call(obj, callbackfn);
+
+assert.sameValue(newArr.length, 0, 'newArr.length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-3-5.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-3-5.js
new file mode 100644
index 0000000000..e240877063
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-3-5.js
@@ -0,0 +1,22 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: Array.prototype.map - value of 'length' is a number (value is -0)
+---*/
+
+function callbackfn(val, idx, obj) {
+  return val > 10;
+}
+
+var obj = {
+  0: 11,
+  length: -0
+};
+
+var newArr = Array.prototype.map.call(obj, callbackfn);
+
+assert.sameValue(newArr.length, 0, 'newArr.length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-3-6.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-3-6.js
new file mode 100644
index 0000000000..5577a5386b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-3-6.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: >
+    Array.prototype.map - 'length' is a string containing a positive
+    number
+---*/
+
+function callbackfn(val, idx, obj) {
+  return val > 10;
+}
+
+var obj = {
+  0: 10,
+  1: 12,
+  2: 9,
+  length: 2
+};
+
+var newArr = Array.prototype.map.call(obj, callbackfn);
+
+assert.sameValue(newArr.length, 2, 'newArr.length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-3-7.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-3-7.js
new file mode 100644
index 0000000000..c333b5f132
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-3-7.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: >
+    Array.prototype.map - 'length' is a string containing a negative
+    number
+---*/
+
+function callbackfn(val, idx, obj) {
+  return val > 10;
+}
+
+var obj = {
+  0: 10,
+  1: 12,
+  2: 9,
+  length: -4294967294
+};
+
+var newArr = Array.prototype.map.call(obj, callbackfn);
+
+assert.sameValue(newArr.length, 0, 'newArr.length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-3-8.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-3-8.js
new file mode 100644
index 0000000000..911ea03c59
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-3-8.js
@@ -0,0 +1,23 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: >
+    Array.prototype.map - value of 'length' is a number (value is
+    Infinity)
+---*/
+
+function callbackfn(val, idx, obj) {
+  return val < 10;
+}
+
+var obj = {
+  0: 9,
+  length: Infinity
+};
+assert.throws(RangeError, function() {
+  Array.prototype.map.call(obj, callbackfn);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-3-9.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-3-9.js
new file mode 100644
index 0000000000..6151c30485
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-3-9.js
@@ -0,0 +1,24 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: >
+    Array.prototype.map - value of 'length' is a number (value is
+    -Infinity)
+---*/
+
+function callbackfn(val, idx, obj) {
+  return val < 10;
+}
+
+var obj = {
+  0: 9,
+  length: -Infinity
+};
+
+var newArr = Array.prototype.map.call(obj, callbackfn);
+
+assert.sameValue(newArr.length, 0, 'newArr.length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-4-1.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-4-1.js
new file mode 100644
index 0000000000..e308770942
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-4-1.js
@@ -0,0 +1,14 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: Array.prototype.map throws TypeError if callbackfn is undefined
+---*/
+
+var arr = new Array(10);
+assert.throws(TypeError, function() {
+  arr.map();
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-4-10.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-4-10.js
new file mode 100644
index 0000000000..4855d9ef99
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-4-10.js
@@ -0,0 +1,27 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: >
+    Array.prototype.map - the exception is not thrown if exception was
+    thrown by step 2
+---*/
+
+var obj = {
+  0: 11,
+  1: 12
+};
+
+Object.defineProperty(obj, "length", {
+  get: function() {
+    throw new Test262Error();
+  },
+  configurable: true
+});
+
+assert.throws(Test262Error, function() {
+  Array.prototype.map.call(obj, undefined);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-4-11.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-4-11.js
new file mode 100644
index 0000000000..9d6b88db92
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-4-11.js
@@ -0,0 +1,31 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: >
+    Array.prototype.map - the exception is not thrown if exception was
+    thrown by step 3
+---*/
+
+var obj = {
+  0: 11,
+  1: 12
+};
+
+Object.defineProperty(obj, "length", {
+  get: function() {
+    return {
+      toString: function() {
+        throw new Test262Error();
+      }
+    };
+  },
+  configurable: true
+});
+
+assert.throws(Test262Error, function() {
+  Array.prototype.map.call(obj, undefined);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-4-12.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-4-12.js
new file mode 100644
index 0000000000..c9740e30db
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-4-12.js
@@ -0,0 +1,19 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: Array.prototype.map - 'callbackfn' is a function
+---*/
+
+function callbackfn(val, idx, obj) {
+  return val > 10;
+}
+
+var testResult = [11, 9].map(callbackfn);
+
+assert.sameValue(testResult.length, 2, 'testResult.length');
+assert.sameValue(testResult[0], true, 'testResult[0]');
+assert.sameValue(testResult[1], false, 'testResult[1]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-4-15.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-4-15.js
new file mode 100644
index 0000000000..053030ae86
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-4-15.js
@@ -0,0 +1,37 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: >
+    Array.prototype.map - calling with no callbackfn is the same as
+    passing undefined for callbackfn
+---*/
+
+var obj = {
+  10: 10
+};
+var lengthAccessed = false;
+var loopAccessed = false;
+
+Object.defineProperty(obj, "length", {
+  get: function() {
+    lengthAccessed = true;
+    return 20;
+  },
+  configurable: true
+});
+Object.defineProperty(obj, "0", {
+  get: function() {
+    loopAccessed = true;
+    return 10;
+  },
+  configurable: true
+});
+assert.throws(TypeError, function() {
+  Array.prototype.map.call(obj);
+});
+assert(lengthAccessed, 'lengthAccessed !== true');
+assert.sameValue(loopAccessed, false, 'loopAccessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-4-2.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-4-2.js
new file mode 100644
index 0000000000..4aaa316ab0
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-4-2.js
@@ -0,0 +1,16 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: >
+    Array.prototype.map throws ReferenceError if callbackfn is
+    unreferenced
+---*/
+
+var arr = new Array(10);
+assert.throws(ReferenceError, function() {
+  arr.map(foo);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-4-3.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-4-3.js
new file mode 100644
index 0000000000..38fb216606
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-4-3.js
@@ -0,0 +1,14 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: Array.prototype.map throws TypeError if callbackfn is null
+---*/
+
+var arr = new Array(10);
+assert.throws(TypeError, function() {
+  arr.map(null);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-4-4.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-4-4.js
new file mode 100644
index 0000000000..080f4dd2cc
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-4-4.js
@@ -0,0 +1,14 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: Array.prototype.map throws TypeError if callbackfn is boolean
+---*/
+
+var arr = new Array(10);
+assert.throws(TypeError, function() {
+  arr.map(true);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-4-5.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-4-5.js
new file mode 100644
index 0000000000..86494fcadf
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-4-5.js
@@ -0,0 +1,14 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: Array.prototype.map throws TypeError if callbackfn is number
+---*/
+
+var arr = new Array(10);
+assert.throws(TypeError, function() {
+  arr.map(5);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-4-6.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-4-6.js
new file mode 100644
index 0000000000..88b7f8203f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-4-6.js
@@ -0,0 +1,14 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: Array.prototype.map throws TypeError if callbackfn is string
+---*/
+
+var arr = new Array(10);
+assert.throws(TypeError, function() {
+  arr.map("abc");
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-4-7.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-4-7.js
new file mode 100644
index 0000000000..84b3497ee3
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-4-7.js
@@ -0,0 +1,16 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: >
+    Array.prototype.map throws TypeError if callbackfn is Object
+    without Call internal method
+---*/
+
+var arr = new Array(10);
+assert.throws(TypeError, function() {
+  arr.map(new Object());
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-4-8.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-4-8.js
new file mode 100644
index 0000000000..2c668ec0ad
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-4-8.js
@@ -0,0 +1,30 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: >
+    Array.prototype.map - Side effects produced by step 2 are visible
+    when an exception occurs
+---*/
+
+var obj = {
+  0: 11,
+  1: 12
+};
+
+var accessed = false;
+
+Object.defineProperty(obj, "length", {
+  get: function() {
+    accessed = true;
+    return 2;
+  },
+  configurable: true
+});
+assert.throws(TypeError, function() {
+  Array.prototype.map.call(obj, null);
+});
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-4-9.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-4-9.js
new file mode 100644
index 0000000000..26a58da4f2
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-4-9.js
@@ -0,0 +1,34 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: >
+    Array.prototype.map - Side effects produced by step 3 are visible
+    when an exception occurs
+---*/
+
+var obj = {
+  0: 11,
+  1: 12
+};
+
+var accessed = false;
+
+Object.defineProperty(obj, "length", {
+  get: function() {
+    return {
+      toString: function() {
+        accessed = true;
+        return "2";
+      }
+    };
+  },
+  configurable: true
+});
+assert.throws(TypeError, function() {
+  Array.prototype.map.call(obj, null);
+});
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-5-1-s.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-5-1-s.js
new file mode 100644
index 0000000000..426a7e16bb
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-5-1-s.js
@@ -0,0 +1,22 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: Array.prototype.map - thisArg not passed to strict callbackfn
+flags: [noStrict]
+---*/
+
+var innerThisCorrect = false;
+
+function callbackfn(val, idx, obj) {
+  "use strict";
+  innerThisCorrect = this === undefined;
+  return true;
+}
+
+[1].map(callbackfn);
+
+assert(innerThisCorrect, 'innerThisCorrect !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-5-1.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-5-1.js
new file mode 100644
index 0000000000..34d5e3a8e1
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-5-1.js
@@ -0,0 +1,25 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: Array.prototype.map - thisArg not passed
+flags: [noStrict]
+---*/
+
+this._15_4_4_19_5_1 = true;
+
+(function() {
+  var _15_4_4_19_5_1 = false;
+
+  function callbackfn(val, idx, obj) {
+    return this._15_4_4_19_5_1;
+  }
+  var srcArr = [1];
+  var resArr = srcArr.map(callbackfn);
+
+  assert.sameValue(resArr[0], true, 'resArr[0]');
+
+})();
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-5-10.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-5-10.js
new file mode 100644
index 0000000000..b189ce82a0
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-5-10.js
@@ -0,0 +1,19 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: Array.prototype.map - Array object can be used as thisArg
+---*/
+
+var objArray = new Array(2);
+
+function callbackfn(val, idx, obj) {
+  return this === objArray;
+}
+
+var testResult = [11].map(callbackfn, objArray);
+
+assert.sameValue(testResult[0], true, 'testResult[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-5-11.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-5-11.js
new file mode 100644
index 0000000000..a050635a19
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-5-11.js
@@ -0,0 +1,19 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: Array.prototype.map - String object can be used as thisArg
+---*/
+
+var objString = new String();
+
+function callbackfn(val, idx, obj) {
+  return this === objString;
+}
+
+var testResult = [11].map(callbackfn, objString);
+
+assert.sameValue(testResult[0], true, 'testResult[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-5-12.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-5-12.js
new file mode 100644
index 0000000000..7e73d6c6a3
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-5-12.js
@@ -0,0 +1,19 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: Array.prototype.map - Boolean object can be used as thisArg
+---*/
+
+var objBoolean = new Boolean();
+
+function callbackfn(val, idx, obj) {
+  return this === objBoolean;
+}
+
+var testResult = [11].map(callbackfn, objBoolean);
+
+assert.sameValue(testResult[0], true, 'testResult[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-5-13.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-5-13.js
new file mode 100644
index 0000000000..9909a7e011
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-5-13.js
@@ -0,0 +1,19 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: Array.prototype.map - Number object can be used as thisArg
+---*/
+
+var objNumber = new Number();
+
+function callbackfn(val, idx, obj) {
+  return this === objNumber;
+}
+
+var testResult = [11].map(callbackfn, objNumber);
+
+assert.sameValue(testResult[0], true, 'testResult[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-5-14.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-5-14.js
new file mode 100644
index 0000000000..4169cb195b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-5-14.js
@@ -0,0 +1,17 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: Array.prototype.map - the Math object can be used as thisArg
+---*/
+
+function callbackfn(val, idx, obj) {
+  return this === Math;
+}
+
+var testResult = [11].map(callbackfn, Math);
+
+assert.sameValue(testResult[0], true, 'testResult[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-5-15.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-5-15.js
new file mode 100644
index 0000000000..aab1605cf7
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-5-15.js
@@ -0,0 +1,19 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: Array.prototype.map - Date object can be used as thisArg
+---*/
+
+var objDate = new Date();
+
+function callbackfn(val, idx, obj) {
+  return this === objDate;
+}
+
+var testResult = [11].map(callbackfn, objDate);
+
+assert.sameValue(testResult[0], true, 'testResult[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-5-16.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-5-16.js
new file mode 100644
index 0000000000..1b8aa1ebfd
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-5-16.js
@@ -0,0 +1,19 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: Array.prototype.map - RegExp object can be used as thisArg
+---*/
+
+var objRegExp = new RegExp();
+
+function callbackfn(val, idx, obj) {
+  return this === objRegExp;
+}
+
+var testResult = [11].map(callbackfn, objRegExp);
+
+assert.sameValue(testResult[0], true, 'testResult[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-5-17.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-5-17.js
new file mode 100644
index 0000000000..f0dffa2e01
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-5-17.js
@@ -0,0 +1,17 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: Array.prototype.map - the JSON object can be used as thisArg
+---*/
+
+function callbackfn(val, idx, obj) {
+  return this === JSON;
+}
+
+var testResult = [11].map(callbackfn, JSON);
+
+assert.sameValue(testResult[0], true, 'testResult[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-5-18.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-5-18.js
new file mode 100644
index 0000000000..4e3f20c309
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-5-18.js
@@ -0,0 +1,19 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: Array.prototype.map - Error object can be used as thisArg
+---*/
+
+var objError = new RangeError();
+
+function callbackfn(val, idx, obj) {
+  return this === objError;
+}
+
+var testResult = [11].map(callbackfn, objError);
+
+assert.sameValue(testResult[0], true, 'testResult[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-5-19.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-5-19.js
new file mode 100644
index 0000000000..92b496daae
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-5-19.js
@@ -0,0 +1,23 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: Array.prototype.map - the Arguments object can be used as thisArg
+---*/
+
+var arg;
+
+function callbackfn(val, idx, obj) {
+  return this === arg;
+}
+
+arg = (function() {
+  return arguments;
+}(1, 2, 3));
+
+var testResult = [11].map(callbackfn, arg);
+
+assert.sameValue(testResult[0], true, 'testResult[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-5-2.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-5-2.js
new file mode 100644
index 0000000000..f0a4c212e4
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-5-2.js
@@ -0,0 +1,23 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: Array.prototype.map - thisArg is Object
+---*/
+
+var res = false;
+var o = new Object();
+o.res = true;
+
+function callbackfn(val, idx, obj)
+{
+  return this.res;
+}
+
+var srcArr = [1];
+var resArr = srcArr.map(callbackfn, o);
+
+assert.sameValue(resArr[0], true, 'resArr[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-5-21.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-5-21.js
new file mode 100644
index 0000000000..413f938cc9
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-5-21.js
@@ -0,0 +1,19 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: Array.prototype.map - the global object can be used as thisArg
+---*/
+
+var global = this;
+
+function callbackfn(val, idx, obj) {
+  return this === global;
+}
+
+var testResult = [11].map(callbackfn, this);
+
+assert.sameValue(testResult[0], true, 'testResult[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-5-22.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-5-22.js
new file mode 100644
index 0000000000..0287d0cff3
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-5-22.js
@@ -0,0 +1,17 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: Array.prototype.map - boolean primitive can be used as thisArg
+---*/
+
+function callbackfn(val, idx, obj) {
+  return this.valueOf() === false;
+}
+
+var testResult = [11].map(callbackfn, false);
+
+assert.sameValue(testResult[0], true, 'testResult[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-5-23.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-5-23.js
new file mode 100644
index 0000000000..19223554d8
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-5-23.js
@@ -0,0 +1,17 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: Array.prototype.map - number primitive can be used as thisArg
+---*/
+
+function callbackfn(val, idx, obj) {
+  return this.valueOf() === 101;
+}
+
+var testResult = [11].map(callbackfn, 101);
+
+assert.sameValue(testResult[0], true, 'testResult[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-5-24.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-5-24.js
new file mode 100644
index 0000000000..13b937def9
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-5-24.js
@@ -0,0 +1,17 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: Array.prototype.map - string primitive can be used as thisArg
+---*/
+
+function callbackfn(val, idx, obj) {
+  return this.valueOf() === "abc";
+}
+
+var testResult = [11].map(callbackfn, "abc");
+
+assert.sameValue(testResult[0], true, 'testResult[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-5-3.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-5-3.js
new file mode 100644
index 0000000000..753782044d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-5-3.js
@@ -0,0 +1,23 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: Array.prototype.map - thisArg is Array
+---*/
+
+var res = false;
+var a = new Array();
+a.res = true;
+
+function callbackfn(val, idx, obj)
+{
+  return this.res;
+}
+
+var srcArr = [1];
+var resArr = srcArr.map(callbackfn, a);
+
+assert.sameValue(resArr[0], true, 'resArr[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-5-4.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-5-4.js
new file mode 100644
index 0000000000..c98291e316
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-5-4.js
@@ -0,0 +1,27 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: >
+    Array.prototype.map - thisArg is object from object
+    template(prototype)
+---*/
+
+var res = false;
+
+function callbackfn(val, idx, obj)
+{
+  return this.res;
+}
+
+function foo() {}
+foo.prototype.res = true;
+var f = new foo();
+
+var srcArr = [1];
+var resArr = srcArr.map(callbackfn, f);
+
+assert.sameValue(resArr[0], true, 'resArr[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-5-5.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-5-5.js
new file mode 100644
index 0000000000..b747af3ea8
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-5-5.js
@@ -0,0 +1,25 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: Array.prototype.map - thisArg is object from object template
+---*/
+
+var res = false;
+
+function callbackfn(val, idx, obj)
+{
+  return this.res;
+}
+
+function foo() {}
+var f = new foo();
+f.res = true;
+
+var srcArr = [1];
+var resArr = srcArr.map(callbackfn, f);
+
+assert.sameValue(resArr[0], true, 'resArr[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-5-6.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-5-6.js
new file mode 100644
index 0000000000..185f7992df
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-5-6.js
@@ -0,0 +1,24 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: Array.prototype.map - thisArg is function
+---*/
+
+var res = false;
+
+function callbackfn(val, idx, obj)
+{
+  return this.res;
+}
+
+function foo() {}
+foo.res = true;
+
+var srcArr = [1];
+var resArr = srcArr.map(callbackfn, foo);
+
+assert.sameValue(resArr[0], true, 'resArr[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-5-7.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-5-7.js
new file mode 100644
index 0000000000..00daa1ecf7
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-5-7.js
@@ -0,0 +1,17 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: Array.prototype.map - built-in functions can be used as thisArg
+---*/
+
+function callbackfn(val, idx, obj) {
+  return this === eval;
+}
+
+var testResult = [11].map(callbackfn, eval);
+
+assert.sameValue(testResult[0], true, 'testResult[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-5-9.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-5-9.js
new file mode 100644
index 0000000000..4be0013d44
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-5-9.js
@@ -0,0 +1,19 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: Array.prototype.map - Function object can be used as thisArg
+---*/
+
+var objFunction = function() {};
+
+function callbackfn(val, idx, obj) {
+  return this === objFunction;
+}
+
+var testResult = [11].map(callbackfn, objFunction);
+
+assert.sameValue(testResult[0], true, 'testResult[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-6-1.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-6-1.js
new file mode 100644
index 0000000000..4d5df81ed1
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-6-1.js
@@ -0,0 +1,15 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: >
+    Array.prototype.map - Array.isArray returns true when input
+    argument is the ourput array
+---*/
+
+var newArr = [11].map(function() {});
+
+assert(Array.isArray(newArr), 'Array.isArray(newArr) !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-6-2.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-6-2.js
new file mode 100644
index 0000000000..c0cd468392
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-6-2.js
@@ -0,0 +1,13 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: Array.prototype.map - the returned array is instanceof Array
+---*/
+
+var newArr = [11].map(function() {});
+
+assert(newArr instanceof Array, 'newArr instanceof Array !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-1.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-1.js
new file mode 100644
index 0000000000..794370ca56
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-1.js
@@ -0,0 +1,23 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: >
+    Array.prototype.map doesn't consider new elements added to array
+    after it is called
+---*/
+
+function callbackfn(val, idx, obj)
+{
+  srcArr[2] = 3;
+  srcArr[5] = 6;
+  return 1;
+}
+
+var srcArr = [1, 2, , 4, 5];
+var resArr = srcArr.map(callbackfn);
+
+assert.sameValue(resArr.length, 5, 'resArr.length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-2.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-2.js
new file mode 100644
index 0000000000..51c5a09cf1
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-2.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: >
+    Array.prototype.map considers new value of elements in array after
+    it is called
+---*/
+
+function callbackfn(val, idx, obj)
+{
+  srcArr[4] = -1;
+  if (val > 0)
+    return 1;
+  else
+    return 0;
+}
+
+var srcArr = [1, 2, 3, 4, 5];
+var resArr = srcArr.map(callbackfn);
+
+assert.sameValue(resArr.length, 5, 'resArr.length');
+assert.sameValue(resArr[4], 0, 'resArr[4]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-3.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-3.js
new file mode 100644
index 0000000000..75836fb0f2
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-3.js
@@ -0,0 +1,27 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: >
+    Array.prototype.map doesn't visit deleted elements in array after
+    the call
+---*/
+
+function callbackfn(val, idx, obj)
+{
+  delete srcArr[4];
+  if (val > 0)
+    return 1;
+  else
+    return 0;
+
+}
+
+var srcArr = [1, 2, 3, 4, 5];
+var resArr = srcArr.map(callbackfn);
+
+assert.sameValue(resArr.length, 5, 'resArr.length');
+assert.sameValue(resArr[4], undefined, 'resArr[4]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-4.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-4.js
new file mode 100644
index 0000000000..44642c47e7
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-4.js
@@ -0,0 +1,27 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: >
+    Array.prototype.map doesn't visit deleted elements when
+    Array.length is decreased
+---*/
+
+var callCnt = 0;
+
+function callbackfn(val, idx, obj)
+{
+  srcArr.length = 2;
+  callCnt++;
+  return 1;
+}
+
+var srcArr = [1, 2, 3, 4, 5];
+var resArr = srcArr.map(callbackfn);
+
+assert.sameValue(resArr.length, 5, 'resArr.length');
+assert.sameValue(callCnt, 2, 'callCnt');
+assert.sameValue(resArr[2], undefined, 'resArr[2]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-5.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-5.js
new file mode 100644
index 0000000000..d4f8874cc6
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-5.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: >
+    Array.prototype.map doesn't consider newly added elements in
+    sparse array
+---*/
+
+var callCnt = 0;
+
+function callbackfn(val, idx, obj)
+{
+  srcArr[1000] = 3;
+  callCnt++;
+  return val;
+}
+
+var srcArr = new Array(10);
+srcArr[1] = 1;
+srcArr[2] = 2;
+var resArr = srcArr.map(callbackfn);
+
+assert.sameValue(resArr.length, 10, 'resArr.length');
+assert.sameValue(callCnt, 2, 'callCnt');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-6.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-6.js
new file mode 100644
index 0000000000..99c7db12b9
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-6.js
@@ -0,0 +1,29 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: >
+    Array.prototype.map visits deleted element in array after the call
+    when same index is also present in prototype
+---*/
+
+function callbackfn(val, idx, obj)
+{
+  delete srcArr[4];
+  if (val > 0)
+    return 1;
+  else
+    return 0;
+
+}
+
+Array.prototype[4] = 5;
+var srcArr = [1, 2, 3, 4, 5];
+var resArr = srcArr.map(callbackfn);
+delete Array.prototype[4];
+
+assert.sameValue(resArr.length, 5, 'resArr.length');
+assert.sameValue(resArr[4], 1, 'resArr[4]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-7.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-7.js
new file mode 100644
index 0000000000..6d203fceba
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-7.js
@@ -0,0 +1,25 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: Array.prototype.map successful to delete the object in callbackfn
+---*/
+
+var obj = {};
+obj.srcArr = [1, 2, 3, 4, 5];
+
+function callbackfn(val, idx, obj) {
+  delete obj.srcArr;
+  if (val > 0)
+    return 1;
+  else
+    return 0;
+}
+
+var resArr = obj.srcArr.map(callbackfn);
+
+assert.sameValue(resArr.toString(), "1,1,1,1,1", 'resArr.toString()');
+assert.sameValue(obj.hasOwnProperty("arr"), false, 'obj.hasOwnProperty("arr")');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-8.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-8.js
new file mode 100644
index 0000000000..4d2849e7a9
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-8.js
@@ -0,0 +1,29 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: >
+    Array.prototype.map - no observable effects occur if length is 0
+    on an Array-like object
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return val > 10;
+}
+
+var obj = {
+  0: 11,
+  1: 12,
+  length: 0
+};
+
+var testResult = Array.prototype.map.call(obj, callbackfn);
+
+assert.sameValue(testResult.length, 0, 'testResult.length');
+assert.sameValue(accessed, false, 'accessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-9.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-9.js
new file mode 100644
index 0000000000..96f92f7287
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-9.js
@@ -0,0 +1,34 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: >
+    Array.prototype.map - modifications to length don't change number
+    of iterations on an Array
+---*/
+
+var called = 0;
+
+function callbackfn(val, idx, obj) {
+  called += 1;
+  return val > 10;
+}
+
+var arr = [9, , 12];
+
+Object.defineProperty(arr, "1", {
+  get: function() {
+    arr.length = 2;
+    return 8;
+  },
+  configurable: true
+});
+
+var testResult = arr.map(callbackfn);
+
+assert.sameValue(testResult.length, 3, 'testResult.length');
+assert.sameValue(called, 2, 'called');
+assert.sameValue(typeof testResult[2], "undefined", 'typeof testResult[2]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-b-1.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-b-1.js
new file mode 100644
index 0000000000..96bac90e72
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-b-1.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: >
+    Array.prototype.map - callbackfn not called for indexes never been
+    assigned values
+---*/
+
+var callCnt = 0;
+
+function callbackfn(val, idx, obj)
+{
+  callCnt++;
+  return 1;
+}
+
+var srcArr = new Array(10);
+srcArr[1] = undefined; //explicitly assigning a value
+var resArr = srcArr.map(callbackfn);
+
+assert.sameValue(resArr.length, 10, 'resArr.length');
+assert.sameValue(callCnt, 1, 'callCnt');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-b-10.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-b-10.js
new file mode 100644
index 0000000000..b8261636f8
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-b-10.js
@@ -0,0 +1,33 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: >
+    Array.prototype.map - deleting property of prototype causes
+    prototype index property not to be visited on an Array-like Object
+---*/
+
+function callbackfn(val, idx, obj) {
+  return idx === 1 && typeof val === "undefined";
+}
+var obj = {
+  2: 2,
+  length: 20
+};
+
+Object.defineProperty(obj, "0", {
+  get: function() {
+    delete Object.prototype[1];
+    return 0;
+  },
+  configurable: true
+});
+
+Object.prototype[1] = 1;
+var testResult = Array.prototype.map.call(obj, callbackfn);
+
+assert.sameValue(testResult.length, 20, 'testResult.length');
+assert.sameValue(typeof testResult[1], "undefined", 'typeof testResult[1]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-b-11.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-b-11.js
new file mode 100644
index 0000000000..996812f874
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-b-11.js
@@ -0,0 +1,30 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: >
+    Array.prototype.map - deleting property of prototype causes
+    prototype index property not to be visited on an Array
+---*/
+
+function callbackfn(val, idx, obj) {
+  return idx === 1 && typeof val === "undefined";
+}
+var arr = [0, , 2];
+
+Object.defineProperty(arr, "0", {
+  get: function() {
+    delete Array.prototype[1];
+    return 0;
+  },
+  configurable: true
+});
+
+Array.prototype[1] = 1;
+var testResult = arr.map(callbackfn);
+
+assert.sameValue(testResult.length, 3, 'testResult.length');
+assert.sameValue(typeof testResult[1], "undefined", 'typeof testResult[1]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-b-12.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-b-12.js
new file mode 100644
index 0000000000..0056170142
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-b-12.js
@@ -0,0 +1,39 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: >
+    Array.prototype.map - deleting own property with prototype
+    property causes prototype index property to be visited on an
+    Array-like object
+---*/
+
+function callbackfn(val, idx, obj) {
+  if (idx === 1 && val === 3) {
+    return false;
+  } else {
+    return true;
+  }
+}
+var obj = {
+  0: 0,
+  1: 1,
+  2: 2,
+  length: 10
+};
+
+Object.defineProperty(obj, "0", {
+  get: function() {
+    delete obj[1];
+    return 0;
+  },
+  configurable: true
+});
+
+Object.prototype[1] = 3;
+var testResult = Array.prototype.map.call(obj, callbackfn);
+
+assert.sameValue(testResult[1], false, 'testResult[1]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-b-13.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-b-13.js
new file mode 100644
index 0000000000..38bd89b4f9
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-b-13.js
@@ -0,0 +1,33 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: >
+    Array.prototype.map - deleting own property with prototype
+    property causes prototype index property to be visited on an Array
+---*/
+
+function callbackfn(val, idx, obj) {
+  if (idx === 1 && val === 3) {
+    return false;
+  } else {
+    return true;
+  }
+}
+var arr = [0, 1, 2];
+
+Object.defineProperty(arr, "0", {
+  get: function() {
+    delete arr[1];
+    return 0;
+  },
+  configurable: true
+});
+
+Array.prototype[1] = 3;
+var testResult = arr.map(callbackfn);
+
+assert.sameValue(testResult[1], false, 'testResult[1]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-b-14.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-b-14.js
new file mode 100644
index 0000000000..af2a27140b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-b-14.js
@@ -0,0 +1,29 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: >
+    Array.prototype.map - decreasing length of array causes index
+    property not to be visited
+---*/
+
+function callbackfn(val, idx, obj) {
+  return idx === 3 && typeof val === "undefined";
+}
+
+var arr = [0, 1, 2, "last"];
+
+Object.defineProperty(arr, "0", {
+  get: function() {
+    arr.length = 3;
+    return 0;
+  },
+  configurable: true
+});
+
+var testResult = arr.map(callbackfn);
+
+assert.sameValue(typeof testResult[3], "undefined", 'typeof testResult[3]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-b-15.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-b-15.js
new file mode 100644
index 0000000000..4ce783a642
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-b-15.js
@@ -0,0 +1,40 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: >
+    Array.prototype.map - decreasing length of array with prototype
+    property causes prototype index property to be visited
+---*/
+
+function callbackfn(val, idx, obj) {
+  if (idx === 2 && val === "prototype") {
+    return false;
+  } else {
+    return true;
+  }
+}
+var arr = [0, 1, 2];
+
+Object.defineProperty(Array.prototype, "2", {
+  get: function() {
+    return "prototype";
+  },
+  configurable: true
+});
+
+Object.defineProperty(arr, "1", {
+  get: function() {
+    arr.length = 2;
+    return 1;
+  },
+  configurable: true
+});
+
+var testResult = arr.map(callbackfn);
+
+assert.sameValue(testResult.length, 3, 'testResult.length');
+assert.sameValue(testResult[2], false, 'testResult[2]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-b-16.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-b-16.js
new file mode 100644
index 0000000000..3d08371488
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-b-16.js
@@ -0,0 +1,42 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: >
+    Array.prototype.map - decreasing length of array does not delete
+    non-configurable properties
+flags: [noStrict]
+---*/
+
+function callbackfn(val, idx, obj) {
+  if (idx === 2 && val === "unconfigurable") {
+    return false;
+  } else {
+    return true;
+  }
+}
+
+var arr = [0, 1, 2];
+
+Object.defineProperty(arr, "2", {
+  get: function() {
+    return "unconfigurable";
+  },
+  configurable: false
+});
+
+Object.defineProperty(arr, "1", {
+  get: function() {
+    arr.length = 2;
+    return 1;
+  },
+  configurable: true
+});
+
+var testResult = arr.map(callbackfn);
+
+assert.sameValue(testResult.length, 3, 'testResult.length');
+assert.sameValue(testResult[2], false, 'testResult[2]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-b-2.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-b-2.js
new file mode 100644
index 0000000000..38cc439de5
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-b-2.js
@@ -0,0 +1,31 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: Array.prototype.map - added properties in step 2 are visible here
+---*/
+
+function callbackfn(val, idx, obj) {
+  if (idx === 2 && val === "length") {
+    return false;
+  } else {
+    return true;
+  }
+}
+
+var obj = {};
+
+Object.defineProperty(obj, "length", {
+  get: function() {
+    obj[2] = "length";
+    return 3;
+  },
+  configurable: true
+});
+
+var testResult = Array.prototype.map.call(obj, callbackfn);
+
+assert.sameValue(testResult[2], false, 'testResult[2]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-b-3.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-b-3.js
new file mode 100644
index 0000000000..447ccaaf55
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-b-3.js
@@ -0,0 +1,33 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: Array.prototype.map - deleted properties in step 2 are visible here
+---*/
+
+function callbackfn(val, idx, obj) {
+  if (idx === 2) {
+    return false;
+  } else {
+    return true;
+  }
+}
+var obj = {
+  2: 6.99,
+  8: 19
+};
+
+Object.defineProperty(obj, "length", {
+  get: function() {
+    delete obj[2];
+    return 10;
+  },
+  configurable: true
+});
+
+var testResult = Array.prototype.map.call(obj, callbackfn);
+
+assert.sameValue(typeof testResult[2], "undefined", 'typeof testResult[2]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-b-4.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-b-4.js
new file mode 100644
index 0000000000..6ee5723eeb
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-b-4.js
@@ -0,0 +1,41 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: >
+    Array.prototype.map - properties added into own object after
+    current position are visited on an Array-like object
+---*/
+
+function callbackfn(val, idx, obj) {
+  if (idx === 1 && val === 1) {
+    return false;
+  } else {
+    return true;
+  }
+}
+
+var obj = {
+  length: 2
+};
+
+Object.defineProperty(obj, "0", {
+  get: function() {
+    Object.defineProperty(obj, "1", {
+      get: function() {
+        return 1;
+      },
+      configurable: true
+    });
+    return 0;
+  },
+  configurable: true
+});
+
+var testResult = Array.prototype.map.call(obj, callbackfn);
+
+assert.sameValue(testResult[0], true, 'testResult[0]');
+assert.sameValue(testResult[1], false, 'testResult[1]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-b-5.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-b-5.js
new file mode 100644
index 0000000000..67b6db527d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-b-5.js
@@ -0,0 +1,39 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: >
+    Array.prototype.map - properties added into own object after
+    current position are visited on an Array
+---*/
+
+function callbackfn(val, idx, obj) {
+  if (idx === 1 && val === 1) {
+    return false;
+  } else {
+    return true;
+  }
+}
+
+var arr = [0, , 2];
+
+Object.defineProperty(arr, "0", {
+  get: function() {
+    Object.defineProperty(arr, "1", {
+      get: function() {
+        return 1;
+      },
+      configurable: true
+    });
+    return 0;
+  },
+  configurable: true
+});
+
+var testResult = arr.map(callbackfn);
+
+assert.sameValue(testResult[0], true, 'testResult[0]');
+assert.sameValue(testResult[1], false, 'testResult[1]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-b-6.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-b-6.js
new file mode 100644
index 0000000000..3c0f54cee6
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-b-6.js
@@ -0,0 +1,40 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: >
+    Array.prototype.map - properties can be added to prototype after
+    current position are visited on an Array-like object
+---*/
+
+function callbackfn(val, idx, obj) {
+  if (idx === 1 && val === 6.99) {
+    return false;
+  } else {
+    return true;
+  }
+}
+var obj = {
+  length: 2
+};
+
+Object.defineProperty(obj, "0", {
+  get: function() {
+    Object.defineProperty(Object.prototype, "1", {
+      get: function() {
+        return 6.99;
+      },
+      configurable: true
+    });
+    return 0;
+  },
+  configurable: true
+});
+
+var testResult = Array.prototype.map.call(obj, callbackfn);
+
+assert.sameValue(testResult[0], true, 'testResult[0]');
+assert.sameValue(testResult[1], false, 'testResult[1]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-b-7.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-b-7.js
new file mode 100644
index 0000000000..a0c8e0cc58
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-b-7.js
@@ -0,0 +1,38 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: >
+    Array.prototype.map - properties can be added to prototype after
+    current position are visited on an Array
+---*/
+
+function callbackfn(val, idx, obj) {
+  if (idx === 1 && val === 6.99) {
+    return false;
+  } else {
+    return true;
+  }
+}
+var arr = [0, , 2];
+
+Object.defineProperty(arr, "0", {
+  get: function() {
+    Object.defineProperty(Array.prototype, "1", {
+      get: function() {
+        return 6.99;
+      },
+      configurable: true
+    });
+    return 0;
+  },
+  configurable: true
+});
+
+var testResult = arr.map(callbackfn);
+
+assert.sameValue(testResult[0], true, 'testResult[0]');
+assert.sameValue(testResult[1], false, 'testResult[1]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-b-8.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-b-8.js
new file mode 100644
index 0000000000..71b66dd49f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-b-8.js
@@ -0,0 +1,42 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: >
+    Array.prototype.map - deleting own property causes index property
+    not to be visited on an Array-like object
+---*/
+
+function callbackfn(val, idx, obj) {
+  if (idx === 1) {
+    return false;
+  } else {
+    return true;
+  }
+}
+var obj = {
+  length: 2
+};
+
+Object.defineProperty(obj, "1", {
+  get: function() {
+    return 6.99;
+  },
+  configurable: true
+});
+
+Object.defineProperty(obj, "0", {
+  get: function() {
+    delete obj[1];
+    return 0;
+  },
+  configurable: true
+});
+
+var testResult = Array.prototype.map.call(obj, callbackfn);
+
+assert.sameValue(testResult[0], true, 'testResult[0]');
+assert.sameValue(typeof testResult[1], "undefined", 'typeof testResult[1]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-b-9.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-b-9.js
new file mode 100644
index 0000000000..0566ab03a5
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-b-9.js
@@ -0,0 +1,40 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: >
+    Array.prototype.map - deleting own property causes index property
+    not to be visited on an Array
+---*/
+
+function callbackfn(val, idx, obj) {
+  if (idx === 1) {
+    return false;
+  } else {
+    return true;
+  }
+}
+var arr = [1, 2];
+
+Object.defineProperty(arr, "1", {
+  get: function() {
+    return "6.99";
+  },
+  configurable: true
+});
+
+Object.defineProperty(arr, "0", {
+  get: function() {
+    delete arr[1];
+    return 0;
+  },
+  configurable: true
+});
+
+var testResult = arr.map(callbackfn);
+
+assert.sameValue(testResult[0], true, 'testResult[0]');
+assert.sameValue(typeof testResult[1], "undefined", 'typeof testResult[1]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-i-1.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-i-1.js
new file mode 100644
index 0000000000..9bc5233ea0
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-i-1.js
@@ -0,0 +1,29 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: >
+    Array.prototype.map - element to be retrieved is own data property
+    on an Array-like object
+---*/
+
+var kValue = {};
+
+function callbackfn(val, idx, obj) {
+  if (idx === 5) {
+    return val === kValue;
+  }
+  return false;
+}
+
+var obj = {
+  5: kValue,
+  length: 100
+};
+
+var newArr = Array.prototype.map.call(obj, callbackfn);
+
+assert.sameValue(newArr[5], true, 'newArr[5]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-i-10.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-i-10.js
new file mode 100644
index 0000000000..ac3500c645
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-i-10.js
@@ -0,0 +1,33 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: >
+    Array.prototype.map - element to be retrieved is own accessor
+    property on an Array
+---*/
+
+var kValue = "abc";
+
+function callbackfn(val, idx, obj) {
+  if (idx === 0) {
+    return val === kValue;
+  }
+  return false;
+}
+
+var arr = [];
+
+Object.defineProperty(arr, "0", {
+  get: function() {
+    return kValue;
+  },
+  configurable: true
+});
+
+var testResult = arr.map(callbackfn);
+
+assert.sameValue(testResult[0], true, 'testResult[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-i-11.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-i-11.js
new file mode 100644
index 0000000000..0da168ded4
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-i-11.js
@@ -0,0 +1,42 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: >
+    Array.prototype.map - element to be retrieved is own accessor
+    property that overrides an inherited data property on an
+    Array-like object
+---*/
+
+var kValue = "abc";
+
+function callbackfn(val, idx, obj) {
+  if (idx === 0) {
+    return val === kValue;
+  }
+  return false;
+}
+
+var proto = {
+  0: 5,
+  length: 2
+};
+
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+
+Object.defineProperty(child, "0", {
+  get: function() {
+    return kValue;
+  },
+  configurable: true
+});
+
+var testResult = Array.prototype.map.call(child, callbackfn);
+
+assert.sameValue(testResult[0], true, 'testResult[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-i-12.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-i-12.js
new file mode 100644
index 0000000000..70cfd46a89
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-i-12.js
@@ -0,0 +1,35 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: >
+    Array.prototype.map - element to be retrieved is own accessor
+    property that overrides an inherited data property on an Array
+---*/
+
+var kValue = "abc";
+
+function callbackfn(val, idx, obj) {
+  if (idx === 0) {
+    return val === kValue;
+  }
+  return false;
+}
+
+var arr = [];
+
+Array.prototype[0] = 11;
+
+Object.defineProperty(arr, "0", {
+  get: function() {
+    return kValue;
+  },
+  configurable: true
+});
+
+var testResult = arr.map(callbackfn);
+
+assert.sameValue(testResult[0], true, 'testResult[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-i-13.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-i-13.js
new file mode 100644
index 0000000000..d1966dfe3e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-i-13.js
@@ -0,0 +1,48 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: >
+    Array.prototype.map - element to be retrieved is own accessor
+    property that overrides an inherited accessor property on an
+    Array-like object
+---*/
+
+var kValue = "abc";
+
+function callbackfn(val, idx, obj) {
+  if (idx === 0) {
+    return val === kValue;
+  }
+  return false;
+}
+
+var proto = {
+  length: 2
+};
+
+Object.defineProperty(proto, "0", {
+  get: function() {
+    return 5;
+  },
+  configurable: true
+});
+
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+
+Object.defineProperty(child, "0", {
+  get: function() {
+    return kValue;
+  },
+  configurable: true
+});
+
+var testResult = Array.prototype.map.call(child, callbackfn);
+
+assert.sameValue(testResult[0], true, 'testResult[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-i-14.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-i-14.js
new file mode 100644
index 0000000000..0616985011
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-i-14.js
@@ -0,0 +1,40 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: >
+    Array.prototype.map - element to be retrieved is own accessor
+    property that overrides an inherited accessor property on an Array
+---*/
+
+var kValue = "abc";
+
+function callbackfn(val, idx, obj) {
+  if (idx === 0) {
+    return val === kValue;
+  }
+  return false;
+}
+
+var arr = [];
+
+Object.defineProperty(Array.prototype, "0", {
+  get: function() {
+    return 11;
+  },
+  configurable: true
+});
+
+Object.defineProperty(arr, "0", {
+  get: function() {
+    return kValue;
+  },
+  configurable: true
+});
+
+var testResult = arr.map(callbackfn);
+
+assert.sameValue(testResult[0], true, 'testResult[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-i-15.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-i-15.js
new file mode 100644
index 0000000000..76caaacb11
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-i-15.js
@@ -0,0 +1,40 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: >
+    Array.prototype.map - element to be retrieved is inherited
+    accessor property on an Array-like object
+---*/
+
+var kValue = "abc";
+
+function callbackfn(val, idx, obj) {
+  if (idx === 0) {
+    return val === kValue;
+  }
+  return false;
+}
+
+var proto = {
+  length: 2
+};
+
+Object.defineProperty(proto, "0", {
+  get: function() {
+    return kValue;
+  },
+  configurable: true
+});
+
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+
+var testResult = Array.prototype.map.call(child, callbackfn);
+
+assert.sameValue(testResult[0], true, 'testResult[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-i-16.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-i-16.js
new file mode 100644
index 0000000000..6a2aaf5ee1
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-i-16.js
@@ -0,0 +1,31 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: >
+    Array.prototype.map - element to be retrieved is inherited
+    accessor property on an Array
+---*/
+
+var kValue = "abc";
+
+function callbackfn(val, idx, obj) {
+  if (idx === 0) {
+    return val === kValue;
+  }
+  return false;
+}
+
+Object.defineProperty(Array.prototype, "0", {
+  get: function() {
+    return kValue;
+  },
+  configurable: true
+});
+
+var testResult = [, ].map(callbackfn);
+
+assert.sameValue(testResult[0], true, 'testResult[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-i-17.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-i-17.js
new file mode 100644
index 0000000000..010092b6a7
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-i-17.js
@@ -0,0 +1,31 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: >
+    Array.prototype.map - element to be retrieved is own accessor
+    property without a get function on an Array-like object
+---*/
+
+function callbackfn(val, idx, obj) {
+  if (idx === 1) {
+    return typeof val === "undefined";
+  }
+  return false;
+}
+
+var obj = {
+  length: 2
+};
+
+Object.defineProperty(obj, "1", {
+  set: function() {},
+  configurable: true
+});
+
+var testResult = Array.prototype.map.call(obj, callbackfn);
+
+assert.sameValue(testResult[1], true, 'testResult[1]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-i-18.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-i-18.js
new file mode 100644
index 0000000000..c9f40cc933
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-i-18.js
@@ -0,0 +1,29 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: >
+    Array.prototype.map - element to be retrieved is own accessor
+    property without a get function on an Array
+---*/
+
+function callbackfn(val, idx, obj) {
+  if (idx === 1) {
+    return typeof val === "undefined";
+  }
+  return false;
+}
+
+var arr = [];
+
+Object.defineProperty(arr, "1", {
+  set: function() {},
+  configurable: true
+});
+
+var testResult = arr.map(callbackfn);
+
+assert.sameValue(testResult[1], true, 'testResult[1]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-i-19.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-i-19.js
new file mode 100644
index 0000000000..90db2b70b1
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-i-19.js
@@ -0,0 +1,37 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: >
+    Array.prototype.map - element to be retrieved is own accessor
+    property without a get function that overrides an inherited
+    accessor property on an Array
+---*/
+
+function callbackfn(val, idx, obj) {
+  if (idx === 0) {
+    return typeof val === "undefined";
+  }
+  return false;
+}
+
+var arr = [];
+
+Object.defineProperty(arr, "0", {
+  set: function() {},
+  configurable: true
+});
+
+Object.defineProperty(Array.prototype, "0", {
+  get: function() {
+    return 100;
+  },
+  configurable: true
+});
+
+var testResult = arr.map(callbackfn);
+
+assert.sameValue(testResult[0], true, 'testResult[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-i-2.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-i-2.js
new file mode 100644
index 0000000000..706d750f9d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-i-2.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: >
+    Array.prototype.map - element to be retrieved is own data property
+    on an Array
+---*/
+
+var kValue = {};
+
+function callbackfn(val, idx, obj) {
+  if (idx === 0) {
+    return val === kValue;
+  }
+  return false;
+}
+
+var arr = [kValue];
+
+var newArr = arr.map(callbackfn);
+
+assert.sameValue(newArr[0], true, 'newArr[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-i-20.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-i-20.js
new file mode 100644
index 0000000000..49d31a2ba3
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-i-20.js
@@ -0,0 +1,43 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: >
+    Array.prototype.map - element to be retrieved is own accessor
+    property without a get function that overrides an inherited
+    accessor property on an Array-like object
+---*/
+
+function callbackfn(val, idx, obj) {
+  if (idx === 0) {
+    return typeof val === "undefined";
+  }
+  return false;
+}
+
+var proto = {};
+
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+child.length = 2;
+
+Object.defineProperty(child, "0", {
+  set: function() {},
+  configurable: true
+});
+
+Object.defineProperty(proto, "0", {
+  get: function() {
+    return 100;
+  },
+  configurable: true
+});
+
+var testResult = Array.prototype.map.call(child, callbackfn);
+
+assert.sameValue(testResult[0], true, 'testResult[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-i-21.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-i-21.js
new file mode 100644
index 0000000000..5ee917eb66
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-i-21.js
@@ -0,0 +1,35 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: >
+    Array.prototype.map - element to be retrieved is inherited
+    accessor property without a get function on an Array-like object
+---*/
+
+function callbackfn(val, idx, obj) {
+  if (idx === 0) {
+    return typeof val === "undefined";
+  }
+  return false;
+}
+
+var proto = {
+  length: 2
+};
+Object.defineProperty(proto, "0", {
+  set: function() {},
+  configurable: true
+});
+
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+
+var testResult = Array.prototype.map.call(child, callbackfn);
+
+assert.sameValue(testResult[0], true, 'testResult[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-i-22.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-i-22.js
new file mode 100644
index 0000000000..cec20409a5
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-i-22.js
@@ -0,0 +1,27 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: >
+    Array.prototype.map - element to be retrieved is inherited
+    accessor property without a get function on an Array
+---*/
+
+function callbackfn(val, idx, obj) {
+  if (idx === 0) {
+    return typeof val === "undefined";
+  }
+  return false;
+}
+
+Object.defineProperty(Array.prototype, "0", {
+  set: function() {},
+  configurable: true
+});
+
+var testResult = [, ].map(callbackfn);
+
+assert.sameValue(testResult[0], true, 'testResult[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-i-25.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-i-25.js
new file mode 100644
index 0000000000..2312cf7e56
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-i-25.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: >
+    Array.prototype.map - This object is the Arguments object which
+    implements its own property get method (number of arguments is
+    less than number of parameters)
+---*/
+
+function callbackfn(val, idx, obj) {
+  if (idx === 0) {
+    return val === 9;
+  } else {
+    return false;
+  }
+}
+
+var func = function(a, b) {
+  return Array.prototype.map.call(arguments, callbackfn);
+};
+
+var testResult = func(9);
+
+assert.sameValue(testResult[0], true, 'testResult[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-i-26.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-i-26.js
new file mode 100644
index 0000000000..b93d2676d6
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-i-26.js
@@ -0,0 +1,31 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: >
+    Array.prototype.map - This object is the Arguments object which
+    implements its own property get method (number of arguments equals
+    number of parameters)
+---*/
+
+function callbackfn(val, idx, obj) {
+  if (idx === 0) {
+    return val === 9;
+  } else if (idx === 1) {
+    return val === 11;
+  } else {
+    return false;
+  }
+}
+
+var func = function(a, b) {
+  return Array.prototype.map.call(arguments, callbackfn);
+};
+
+var testResult = func(9, 11);
+
+assert.sameValue(testResult[0], true, 'testResult[0]');
+assert.sameValue(testResult[1], true, 'testResult[1]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-i-27.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-i-27.js
new file mode 100644
index 0000000000..0d082d7d80
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-i-27.js
@@ -0,0 +1,35 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: >
+    Array.prototype.map - This object is the Arguments object which
+    implements its own property get method (number of arguments is
+    greater than number of parameters)
+---*/
+
+function callbackfn(val, idx, obj) {
+  if (idx === 0) {
+    return val === 9;
+  } else if (idx === 1) {
+    return val === 11;
+  } else if (idx === 2) {
+    return val === 12;
+  } else {
+    return false;
+  }
+
+}
+
+var func = function(a, b) {
+  return Array.prototype.map.call(arguments, callbackfn);
+};
+
+var testResult = func(9, 11, 12);
+
+assert.sameValue(testResult[0], true, 'testResult[0]');
+assert.sameValue(testResult[1], true, 'testResult[1]');
+assert.sameValue(testResult[2], true, 'testResult[2]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-i-28.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-i-28.js
new file mode 100644
index 0000000000..cf82881c11
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-i-28.js
@@ -0,0 +1,48 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: >
+    Array.prototype.map - element changed by getter on previous
+    iterations is observed on an Array
+---*/
+
+var preIterVisible = false;
+var arr = [];
+
+function callbackfn(val, idx, obj) {
+  if (idx === 0) {
+    return val === 11;
+  } else if (idx === 1) {
+    return val === 9;
+  } else {
+    return false;
+  }
+}
+
+Object.defineProperty(arr, "0", {
+  get: function() {
+    preIterVisible = true;
+    return 11;
+  },
+  configurable: true
+});
+
+Object.defineProperty(arr, "1", {
+  get: function() {
+    if (preIterVisible) {
+      return 9;
+    } else {
+      return 11;
+    }
+  },
+  configurable: true
+});
+
+var testResult = arr.map(callbackfn);
+
+assert.sameValue(testResult[0], true, 'testResult[0]');
+assert.sameValue(testResult[1], true, 'testResult[1]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-i-29.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-i-29.js
new file mode 100644
index 0000000000..047a791cbd
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-i-29.js
@@ -0,0 +1,50 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: >
+    Array.prototype.map - element changed by getter on previous
+    iterations is observed on an Array-like object
+---*/
+
+var preIterVisible = false;
+var obj = {
+  length: 2
+};
+
+function callbackfn(val, idx, obj) {
+  if (idx === 0) {
+    return val === 11;
+  } else if (idx === 1) {
+    return val === 9;
+  } else {
+    return false;
+  }
+}
+
+Object.defineProperty(obj, "0", {
+  get: function() {
+    preIterVisible = true;
+    return 11;
+  },
+  configurable: true
+});
+
+Object.defineProperty(obj, "1", {
+  get: function() {
+    if (preIterVisible) {
+      return 9;
+    } else {
+      return 11;
+    }
+  },
+  configurable: true
+});
+
+var testResult = Array.prototype.map.call(obj, callbackfn);
+
+assert.sameValue(testResult[0], true, 'testResult[0]');
+assert.sameValue(testResult[1], true, 'testResult[1]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-i-3.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-i-3.js
new file mode 100644
index 0000000000..d7a6011c47
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-i-3.js
@@ -0,0 +1,35 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: >
+    Array.prototype.map - element to be retrieved is own data property
+    that overrides an inherited data property on an Array-like object
+---*/
+
+var kValue = "abc";
+
+function callbackfn(val, idx, obj) {
+  if (idx === 5) {
+    return val === kValue;
+  }
+  return false;
+}
+
+var proto = {
+  5: 12,
+  length: 10
+};
+
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+child[5] = kValue;
+
+var testResult = Array.prototype.map.call(child, callbackfn);
+
+assert.sameValue(testResult[5], true, 'testResult[5]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-i-30.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-i-30.js
new file mode 100644
index 0000000000..f056c41aa2
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-i-30.js
@@ -0,0 +1,44 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: >
+    Array.prototype.map - unhandled exceptions happened in getter
+    terminate iteration on an Array-like object
+---*/
+
+var obj = {
+  0: 11,
+  5: 10,
+  10: 8,
+  length: 20
+};
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  if (idx > 1) {
+    accessed = true;
+  }
+}
+
+Object.defineProperty(obj, "1", {
+  get: function() {
+    throw new RangeError("unhandle exception happened in getter");
+  },
+  configurable: true
+});
+
+Object.defineProperty(obj, "2", {
+  get: function() {
+    accessed = true;
+    return 100;
+  },
+  configurable: true
+});
+assert.throws(RangeError, function() {
+  Array.prototype.map.call(obj, callbackfn);
+});
+assert.sameValue(accessed, false, 'accessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-i-31.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-i-31.js
new file mode 100644
index 0000000000..19590755a8
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-i-31.js
@@ -0,0 +1,42 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: >
+    Array.prototype.map - unhandled exceptions happened in getter
+    terminate iteration on an Array
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  if (idx > 1) {
+    accessed = true;
+  }
+}
+
+var arr = [];
+arr[5] = 10;
+arr[10] = 100;
+
+Object.defineProperty(arr, "1", {
+  get: function() {
+    throw new RangeError("unhandle exception happened in getter");
+  },
+  configurable: true
+});
+
+Object.defineProperty(arr, "2", {
+  get: function() {
+    accessed = true;
+    return 100;
+  },
+  configurable: true
+});
+assert.throws(RangeError, function() {
+  arr.map(callbackfn);
+});
+assert.sameValue(accessed, false, 'accessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-i-4.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-i-4.js
new file mode 100644
index 0000000000..f3c5c531b4
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-i-4.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: >
+    Array.prototype.map - element to be retrieved is own data property
+    that overrides an inherited data property on an Array
+---*/
+
+var kValue = "abc";
+
+function callbackfn(val, idx, obj) {
+  if (idx === 0) {
+    return val === kValue;
+  }
+  return false;
+}
+
+Array.prototype[0] = 11;
+
+var testResult = [kValue].map(callbackfn);
+
+assert.sameValue(testResult[0], true, 'testResult[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-i-5.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-i-5.js
new file mode 100644
index 0000000000..e56d98dfb3
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-i-5.js
@@ -0,0 +1,44 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: >
+    Array.prototype.map - element to be retrieved is own data property
+    that overrides an inherited accessor property on an Array-like
+    object
+---*/
+
+var kValue = "abc";
+
+function callbackfn(val, idx, obj) {
+  if (idx === 5) {
+    return val === kValue;
+  }
+  return false;
+}
+
+var proto = {};
+
+Object.defineProperty(proto, "5", {
+  get: function() {
+    return 11;
+  },
+  configurable: true
+});
+
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+child.length = 10;
+Object.defineProperty(child, "5", {
+  value: kValue,
+  configurable: true
+});
+
+var testResult = Array.prototype.map.call(child, callbackfn);
+
+assert.sameValue(testResult[5], true, 'testResult[5]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-i-6.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-i-6.js
new file mode 100644
index 0000000000..e45f5ae86b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-i-6.js
@@ -0,0 +1,31 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: >
+    Array.prototype.map - element to be retrieved is own data property
+    that overrides an inherited accessor property on an Array
+---*/
+
+var kValue = "abc";
+
+function callbackfn(val, idx, obj) {
+  if (idx === 0) {
+    return val === kValue;
+  }
+  return false;
+}
+
+Object.defineProperty(Array.prototype, "0", {
+  get: function() {
+    return 9;
+  },
+  configurable: true
+});
+
+var testResult = [kValue].map(callbackfn);
+
+assert.sameValue(testResult[0], true, 'testResult[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-i-7.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-i-7.js
new file mode 100644
index 0000000000..db5a058191
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-i-7.js
@@ -0,0 +1,34 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: >
+    Array.prototype.map - element to be retrieved is inherited data
+    property on an Array-like object
+---*/
+
+var kValue = "abc";
+
+function callbackfn(val, idx, obj) {
+  if (idx === 5) {
+    return val === kValue;
+  }
+  return false;
+}
+
+var proto = {
+  5: kValue,
+  length: 10
+};
+
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+
+var newArr = Array.prototype.map.call(child, callbackfn);
+
+assert.sameValue(newArr[5], true, 'newArr[5]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-i-8.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-i-8.js
new file mode 100644
index 0000000000..d4f90ed45e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-i-8.js
@@ -0,0 +1,24 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: >
+    Array.prototype.map - element to be retrieved is inherited data
+    property on an Array
+---*/
+
+function callbackfn(val, idx, obj) {
+  if (idx === 1) {
+    return val === 13;
+  }
+  return false;
+}
+
+Array.prototype[1] = 13;
+
+var newArr = [, , , ].map(callbackfn);
+
+assert.sameValue(newArr[1], true, 'newArr[1]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-i-9.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-i-9.js
new file mode 100644
index 0000000000..84f5388fa0
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-i-9.js
@@ -0,0 +1,35 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: >
+    Array.prototype.map - element to be retrieved is own accessor
+    property on an Array-like object
+---*/
+
+var kValue = "abc";
+
+function callbackfn(val, idx, obj) {
+  if (idx === 0) {
+    return val === kValue;
+  }
+  return false;
+}
+
+var obj = {
+  length: 2
+};
+
+Object.defineProperty(obj, "0", {
+  get: function() {
+    return kValue;
+  },
+  configurable: true
+});
+
+var testResult = Array.prototype.map.call(obj, callbackfn);
+
+assert.sameValue(testResult[0], true, 'testResult[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-ii-1.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-ii-1.js
new file mode 100644
index 0000000000..137bdc3e3a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-ii-1.js
@@ -0,0 +1,27 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: Array.prototype.map - callbackfn called with correct parameters
+---*/
+
+var bPar = true;
+var bCalled = false;
+
+function callbackfn(val, idx, obj)
+{
+  bCalled = true;
+  if (obj[idx] !== val)
+    bPar = false;
+}
+
+var srcArr = [0, 1, true, null, new Object(), "five"];
+srcArr[999999] = -6.6;
+var resArr = srcArr.map(callbackfn);
+
+
+assert.sameValue(bCalled, true, 'bCalled');
+assert.sameValue(bPar, true, 'bPar');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-ii-10.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-ii-10.js
new file mode 100644
index 0000000000..3642d53770
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-ii-10.js
@@ -0,0 +1,17 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: Array.prototype.map - callbackfn is called with 1 formal parameter
+---*/
+
+function callbackfn(val) {
+  return val > 10;
+}
+
+var testResult = [11].map(callbackfn);
+
+assert.sameValue(testResult[0], true, 'testResult[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-ii-11.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-ii-11.js
new file mode 100644
index 0000000000..90a43f7de5
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-ii-11.js
@@ -0,0 +1,17 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: Array.prototype.map - callbackfn is called with 2 formal parameters
+---*/
+
+function callbackfn(val, idx) {
+  return (val > 10 && arguments[2][idx] === val);
+}
+
+var testResult = [11].map(callbackfn);
+
+assert.sameValue(testResult[0], true, 'testResult[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-ii-12.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-ii-12.js
new file mode 100644
index 0000000000..fb6b879d6e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-ii-12.js
@@ -0,0 +1,17 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: Array.prototype.map - callbackfn is called with 3 formal parameters
+---*/
+
+function callbackfn(val, idx, obj) {
+  return (val > 10 && obj[idx] === val);
+}
+
+var testResult = [11].map(callbackfn);
+
+assert.sameValue(testResult[0], true, 'testResult[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-ii-13.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-ii-13.js
new file mode 100644
index 0000000000..4a86a55968
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-ii-13.js
@@ -0,0 +1,19 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: >
+    Array.prototype.map - callbackfn that uses arguments object to get
+    parameter value
+---*/
+
+function callbackfn() {
+  return arguments[2][arguments[1]] === arguments[0];
+}
+
+var testResult = [11].map(callbackfn);
+
+assert.sameValue(testResult[0], true, 'testResult[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-ii-16.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-ii-16.js
new file mode 100644
index 0000000000..9eef633abb
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-ii-16.js
@@ -0,0 +1,24 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: >
+    Array.prototype.map - 'this' object when T is not an object (T is
+    a boolean primitive)
+---*/
+
+function callbackfn(val, idx, obj) {
+  return this.valueOf() === false;
+}
+
+var obj = {
+  0: 11,
+  length: 2
+};
+
+var testResult = Array.prototype.map.call(obj, callbackfn, false);
+
+assert.sameValue(testResult[0], true, 'testResult[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-ii-17.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-ii-17.js
new file mode 100644
index 0000000000..dfa2008c0a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-ii-17.js
@@ -0,0 +1,24 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: >
+    Array.prototype.map - 'this' object when T is not an object (T is
+    a number)
+---*/
+
+function callbackfn(val, idx, obj) {
+  return this.valueOf() === 5;
+}
+
+var obj = {
+  0: 11,
+  length: 2
+};
+
+var testResult = Array.prototype.map.call(obj, callbackfn, 5);
+
+assert.sameValue(testResult[0], true, 'testResult[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-ii-18.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-ii-18.js
new file mode 100644
index 0000000000..515cfda4dc
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-ii-18.js
@@ -0,0 +1,24 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: >
+    Array.prototype.map - 'this' object when T is not an object (T is
+    a string primitive)
+---*/
+
+function callbackfn(val, idx, obj) {
+  return this.valueOf() === "hello!";
+}
+
+var obj = {
+  0: 11,
+  length: 2
+};
+
+var testResult = Array.prototype.map.call(obj, callbackfn, "hello!");
+
+assert.sameValue(testResult[0], true, 'testResult[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-ii-19.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-ii-19.js
new file mode 100644
index 0000000000..6dbba43000
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-ii-19.js
@@ -0,0 +1,32 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: Array.prototype.map - non-indexed properties are not called.
+---*/
+
+var called = 0;
+var result = false;
+
+function callbackfn(val, idx, obj) {
+  called++;
+  if (val === 11) {
+    result = true;
+  }
+  return true;
+}
+
+var obj = {
+  0: 9,
+  non_index_property: 11,
+  length: 20
+};
+
+var testResult = Array.prototype.map.call(obj, callbackfn);
+
+assert.sameValue(result, false, 'result');
+assert.sameValue(testResult[0], true, 'testResult[0]');
+assert.sameValue(called, 1, 'called');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-ii-2.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-ii-2.js
new file mode 100644
index 0000000000..0f23cc97fd
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-ii-2.js
@@ -0,0 +1,25 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: Array.prototype.map - callbackfn takes 3 arguments
+---*/
+
+var parCnt = 3;
+var bCalled = false
+
+function callbackfn(val, idx, obj)
+{
+  bCalled = true;
+  if (arguments.length !== 3)
+    parCnt = arguments.length; //verify if callbackfn was called with 3 parameters
+}
+
+var srcArr = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9];
+var resArr = srcArr.map(callbackfn);
+
+assert.sameValue(bCalled, true, 'bCalled');
+assert.sameValue(parCnt, 3, 'parCnt');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-ii-20.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-ii-20.js
new file mode 100644
index 0000000000..02dbdfcfa3
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-ii-20.js
@@ -0,0 +1,29 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: >
+    Array.prototype.map - callbackfn called with correct parameters
+    (thisArg is correct)
+---*/
+
+function callbackfn(val, idx, obj) {
+  return this.threshold === 10;
+}
+
+var thisArg = {
+  threshold: 10
+};
+
+var obj = {
+  0: 11,
+  1: 9,
+  length: 2
+};
+
+var testResult = Array.prototype.map.call(obj, callbackfn, thisArg);
+
+assert.sameValue(testResult[0], true, 'testResult[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-ii-21.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-ii-21.js
new file mode 100644
index 0000000000..3f33cd7778
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-ii-21.js
@@ -0,0 +1,34 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: >
+    Array.prototype.map - callbackfn called with correct parameters
+    (kValue is correct)
+---*/
+
+function callbackfn(val, idx, obj) {
+  if (idx === 0) {
+    return val === 11;
+  }
+
+  if (idx === 1) {
+    return val === 12;
+  }
+
+  return false;
+}
+
+var obj = {
+  0: 11,
+  1: 12,
+  length: 2
+};
+
+var testResult = Array.prototype.map.call(obj, callbackfn);
+
+assert.sameValue(testResult[0], true, 'testResult[0]');
+assert.sameValue(testResult[1], true, 'testResult[1]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-ii-22.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-ii-22.js
new file mode 100644
index 0000000000..9f5e480683
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-ii-22.js
@@ -0,0 +1,34 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: >
+    Array.prototype.map - callbackfn called with correct parameters
+    (the index k is correct)
+---*/
+
+function callbackfn(val, idx, obj) {
+  if (val === 11) {
+    return idx === 0;
+  }
+
+  if (val === 12) {
+    return idx === 1;
+  }
+
+  return false;
+}
+
+var obj = {
+  0: 11,
+  1: 12,
+  length: 2
+};
+
+var testResult = Array.prototype.map.call(obj, callbackfn);
+
+assert.sameValue(testResult[0], true, 'testResult[0]');
+assert.sameValue(testResult[1], true, 'testResult[1]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-ii-23.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-ii-23.js
new file mode 100644
index 0000000000..4ed80de5e6
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-ii-23.js
@@ -0,0 +1,24 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: >
+    Array.prototype.map - callbackfn called with correct parameters
+    (this object O is correct)
+---*/
+
+var obj = {
+  0: 11,
+  length: 2
+};
+
+function callbackfn(val, idx, o) {
+  return obj === o;
+}
+
+var testResult = Array.prototype.map.call(obj, callbackfn);
+
+assert.sameValue(testResult[0], true, 'testResult[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-ii-4.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-ii-4.js
new file mode 100644
index 0000000000..a561076362
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-ii-4.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: Array.prototype.map - k values are passed in acending numeric order
+---*/
+
+var arr = [0, 1, 2, 3, 4, 5];
+var lastIdx = 0;
+var called = 0;
+var result = true;
+
+function callbackfn(val, idx, o) {
+  called++;
+  if (lastIdx !== idx) {
+    result = false;
+  } else {
+    lastIdx++;
+  }
+}
+
+arr.map(callbackfn);
+
+assert(result, 'result !== true');
+assert.sameValue(arr.length, called, 'arr.length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-ii-5.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-ii-5.js
new file mode 100644
index 0000000000..738c50cab5
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-ii-5.js
@@ -0,0 +1,36 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: >
+    Array.prototype.map - k values are accessed during each iteration
+    and not prior to starting the loop.
+---*/
+
+var kIndex = [];
+
+//By below way, we could verify that k would be setted as 0, 1, ..., length - 1 in order, and each value will be setted one time.
+function callbackfn(val, idx, obj) {
+  //Each position should be visited one time, which means k is accessed one time during iterations.
+  if (typeof kIndex[idx] === "undefined") {
+    //when current position is visited, its previous index should has been visited.
+    if (idx !== 0 && typeof kIndex[idx - 1] === "undefined") {
+      return true;
+    }
+    kIndex[idx] = 1;
+    return false;
+  } else {
+    return true;
+  }
+}
+
+var testResult = [11, 12, 13, 14].map(callbackfn);
+
+assert.sameValue(testResult.length, 4, 'testResult.length');
+assert.sameValue(testResult[0], false, 'testResult[0]');
+assert.sameValue(testResult[1], false, 'testResult[1]');
+assert.sameValue(testResult[2], false, 'testResult[2]');
+assert.sameValue(testResult[3], false, 'testResult[3]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-ii-6.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-ii-6.js
new file mode 100644
index 0000000000..56aabf82e3
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-ii-6.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: Array.prototype.map - arguments to callbackfn are self consistent.
+---*/
+
+var obj = {
+  0: 11,
+  length: 1
+};
+var thisArg = {};
+
+function callbackfn() {
+  return this === thisArg &&
+    arguments[0] === 11 &&
+    arguments[1] === 0 &&
+    arguments[2] === obj;
+}
+
+var testResult = Array.prototype.map.call(obj, callbackfn, thisArg);
+
+assert.sameValue(testResult[0], true, 'testResult[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-ii-7.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-ii-7.js
new file mode 100644
index 0000000000..4defb5c313
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-ii-7.js
@@ -0,0 +1,33 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: >
+    Array.prototype.map - unhandled exceptions happened in callbackfn
+    terminate iteration
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  if (idx > 0) {
+    accessed = true;
+  }
+  if (idx === 0) {
+    throw new Error("Exception occurred in callbackfn");
+  }
+}
+
+var obj = {
+  0: 11,
+  4: 10,
+  10: 8,
+  length: 20
+};
+assert.throws(Error, function() {
+  Array.prototype.map.call(obj, callbackfn);
+});
+assert.sameValue(accessed, false, 'accessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-ii-8.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-ii-8.js
new file mode 100644
index 0000000000..fdb6b40003
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-ii-8.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: >
+    Array.prototype.map - element changed by callbackfn on previous
+    iterations is observed
+---*/
+
+var obj = {
+  0: 9,
+  1: 12,
+  length: 2
+};
+
+function callbackfn(val, idx, o) {
+  if (idx === 0) {
+    obj[idx + 1] = 8;
+  }
+  return val > 10;
+}
+
+var testResult = Array.prototype.map.call(obj, callbackfn);
+
+assert.sameValue(testResult[1], false, 'testResult[1]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-ii-9.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-ii-9.js
new file mode 100644
index 0000000000..3064557e85
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-ii-9.js
@@ -0,0 +1,17 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: Array.prototype.map - callbackfn with 0 formal parameter
+---*/
+
+function callbackfn() {
+  return true;
+}
+
+var testResult = [11].map(callbackfn);
+
+assert.sameValue(testResult[0], true, 'testResult[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-iii-1.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-iii-1.js
new file mode 100644
index 0000000000..14ec4f6fd2
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-iii-1.js
@@ -0,0 +1,29 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: >
+    Array.prototype.map - getOwnPropertyDescriptor(all true) of
+    returned array element
+---*/
+
+function callbackfn(val, idx, obj) {
+  if (val % 2)
+    return (2 * val + 1);
+  else
+    return (val / 2);
+}
+var srcArr = [0, 1, 2, 3, 4];
+var resArr = srcArr.map(callbackfn);
+
+assert(resArr.length > 0, 'resArr.length > 0');
+
+var desc = Object.getOwnPropertyDescriptor(resArr, 1);
+
+assert.sameValue(desc.value, 3, 'desc.value'); //srcArr[1] = 2*1+1 = 3
+assert.sameValue(desc.writable, true, 'desc.writable');
+assert.sameValue(desc.enumerable, true, 'desc.enumerable');
+assert.sameValue(desc.configurable, true, 'desc.configurable');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-iii-2.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-iii-2.js
new file mode 100644
index 0000000000..42433e4f87
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-iii-2.js
@@ -0,0 +1,25 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: >
+    Array.prototype.map - value of returned array element equals to
+    'mappedValue'
+---*/
+
+function callbackfn(val, idx, obj) {
+  return val;
+}
+
+var obj = {
+  0: 11,
+  1: 9,
+  length: 2
+};
+var newArr = Array.prototype.map.call(obj, callbackfn);
+
+assert.sameValue(newArr[0], obj[0], 'newArr[0]');
+assert.sameValue(newArr[1], obj[1], 'newArr[1]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-iii-3.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-iii-3.js
new file mode 100644
index 0000000000..f10267fe44
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-iii-3.js
@@ -0,0 +1,27 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: >
+    Array.prototype.map - value of returned array element can be
+    overwritten
+---*/
+
+function callbackfn(val, idx, obj) {
+  return 11;
+}
+
+var obj = {
+  0: 11,
+  1: 9,
+  length: 2
+};
+var newArr = Array.prototype.map.call(obj, callbackfn);
+
+var tempVal = newArr[1];
+newArr[1] += 1;
+
+assert.notSameValue(newArr[1], tempVal, 'newArr[1]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-iii-4.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-iii-4.js
new file mode 100644
index 0000000000..4d9b9ec42b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-iii-4.js
@@ -0,0 +1,33 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: >
+    Array.prototype.map - value of returned array element can be
+    enumerated
+---*/
+
+function callbackfn(val, idx, obj) {
+  return true;
+}
+
+var obj = {
+  0: 11,
+  length: 2
+};
+var newArr = Array.prototype.map.call(obj, callbackfn);
+
+var prop;
+var enumerable = false;
+for (prop in newArr) {
+  if (newArr.hasOwnProperty(prop)) {
+    if (prop === "0") {
+      enumerable = true;
+    }
+  }
+}
+
+assert(enumerable, 'enumerable !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-iii-5.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-iii-5.js
new file mode 100644
index 0000000000..00ad77685f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-8-c-iii-5.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: >
+    Array.prototype.map - value of returned array element can be
+    changed or deleted
+---*/
+
+function callbackfn(val, idx, obj) {
+  return true;
+}
+
+var obj = {
+  0: 11,
+  1: 9,
+  length: 2
+};
+var newArr = Array.prototype.map.call(obj, callbackfn);
+
+var tempVal = newArr[1];
+delete newArr[1];
+
+assert.notSameValue(tempVal, undefined, 'tempVal');
+assert.sameValue(newArr[1], undefined, 'newArr[1]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-9-1.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-9-1.js
new file mode 100644
index 0000000000..8103784cce
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-9-1.js
@@ -0,0 +1,24 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: >
+    Array.prototype.map doesn't mutate the Array on which it is called
+    on
+---*/
+
+function callbackfn(val, idx, obj)
+{
+  return true;
+}
+var srcArr = [1, 2, 3, 4, 5];
+srcArr.map(callbackfn);
+
+assert.sameValue(srcArr[0], 1, 'srcArr[0]');
+assert.sameValue(srcArr[1], 2, 'srcArr[1]');
+assert.sameValue(srcArr[2], 3, 'srcArr[2]');
+assert.sameValue(srcArr[3], 4, 'srcArr[3]');
+assert.sameValue(srcArr[4], 5, 'srcArr[4]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-9-10.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-9-10.js
new file mode 100644
index 0000000000..e3daa4d151
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-9-10.js
@@ -0,0 +1,31 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: >
+    Array.prototype.map - empty array to be returned if 'length' is 0
+    (subclassed Array, length overridden with obj with valueOf)
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return val > 10;
+}
+
+var Foo = function() {};
+Foo.prototype = [1, 2, 3];
+var obj = new Foo();
+obj.length = {
+  valueOf: function() {
+    return 0;
+  }
+};
+
+var testResult = Array.prototype.map.call(obj, callbackfn);
+
+assert.sameValue(testResult.length, 0, 'testResult.length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-9-11.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-9-11.js
new file mode 100644
index 0000000000..9a5dab55a8
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-9-11.js
@@ -0,0 +1,36 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: >
+    Array.prototype.map - returns an empty array if 'length' is 0
+    (subclassed Array, length overridden with obj w/o valueOf
+    (toString))
+---*/
+
+function Foo() {}
+Foo.prototype = [1, 2, 3];
+
+var f = new Foo();
+
+var o = {
+  toString: function() {
+    return '0';
+  }
+};
+f.length = o;
+
+// objects inherit the default valueOf method of the Object object;
+// that simply returns the itself. Since the default valueOf() method
+// does not return a primitive value, ES next tries to convert the object
+// to a number by calling its toString() method and converting the
+// resulting string to a number.
+
+function cb() {}
+var a = Array.prototype.map.call(f, cb);
+
+assert(Array.isArray(a), 'Array.isArray(a) !== true');
+assert.sameValue(a.length, 0, 'a.length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-9-12.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-9-12.js
new file mode 100644
index 0000000000..06631cb716
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-9-12.js
@@ -0,0 +1,37 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: >
+    Array.prototype.map - returns an empty array if 'length' is 0
+    (subclassed Array, length overridden with [])
+---*/
+
+function Foo() {}
+Foo.prototype = [1, 2, 3];
+var f = new Foo();
+
+f.length = [];
+
+// objects inherit the default valueOf method of the Object object;
+// that simply returns the itself. Since the default valueOf() method
+// does not return a primitive value, ES next tries to convert the object
+// to a number by calling its toString() method and converting the
+// resulting string to a number.
+//
+// The toString( ) method on Array converts the array elements to strings,
+// then returns the result of concatenating these strings, with commas in
+// between. An array with no elements converts to the empty string, which
+// converts to the number 0. If an array has a single element that is a
+// number n, the array converts to a string representation of n, which is
+// then converted back to n itself. If an array contains more than one element,
+// or if its one element is not a number, the array converts to NaN.
+
+function cb() {}
+var a = Array.prototype.map.call(f, cb);
+
+assert(Array.isArray(a), 'Array.isArray(a) !== true');
+assert.sameValue(a.length, 0, 'a.length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-9-13.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-9-13.js
new file mode 100644
index 0000000000..a6baff3583
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-9-13.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: >
+    Array.prototype.map - if there are no side effects of the
+    functions, O is unmodified
+---*/
+
+var called = 0;
+
+function callbackfn(val, idx, obj) {
+  called++;
+  return val > 2;
+}
+
+var arr = [1, 2, 3, 4];
+
+arr.map(callbackfn);
+
+assert.sameValue(arr[0], 1, 'arr[0]');
+assert.sameValue(arr[1], 2, 'arr[1]');
+assert.sameValue(arr[2], 3, 'arr[2]');
+assert.sameValue(arr[3], 4, 'arr[3]');
+assert.sameValue(called, 4, 'called');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-9-2.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-9-2.js
new file mode 100644
index 0000000000..4e420cde77
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-9-2.js
@@ -0,0 +1,24 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: >
+    Array.prototype.map returns new Array with same number of elements
+    and values the result of callbackfn
+---*/
+
+function callbackfn(val, idx, obj)
+{
+  return val + 10;
+}
+var srcArr = [1, 2, 3, 4, 5];
+var resArr = srcArr.map(callbackfn);
+
+assert.sameValue(resArr[0], 11, 'resArr[0]');
+assert.sameValue(resArr[1], 12, 'resArr[1]');
+assert.sameValue(resArr[2], 13, 'resArr[2]');
+assert.sameValue(resArr[3], 14, 'resArr[3]');
+assert.sameValue(resArr[4], 15, 'resArr[4]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-9-3.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-9-3.js
new file mode 100644
index 0000000000..4831adaca2
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-9-3.js
@@ -0,0 +1,22 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: Array.prototype.map - subclassed array when length is reduced
+---*/
+
+foo.prototype = new Array(1, 2, 3);
+
+function foo() {}
+var f = new foo();
+f.length = 1;
+
+function cb() {}
+var a = f.map(cb);
+
+
+assert(Array.isArray(a), 'Array.isArray(a) !== true');
+assert.sameValue(a.length, 1, 'a.length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-9-4.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-9-4.js
new file mode 100644
index 0000000000..09f4e1a7b6
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-9-4.js
@@ -0,0 +1,23 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: Array.prototype.map doesn't visit expandos
+---*/
+
+var callCnt = 0;
+
+function callbackfn(val, idx, obj)
+{
+  callCnt++;
+}
+var srcArr = [1, 2, 3, 4, 5];
+srcArr["i"] = 10;
+srcArr[true] = 11;
+
+var resArr = srcArr.map(callbackfn);
+
+assert.sameValue(callCnt, 5, 'callCnt');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-9-5.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-9-5.js
new file mode 100644
index 0000000000..e4ec7cb36b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-9-5.js
@@ -0,0 +1,25 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: >
+    Array.prototype.map - empty array to be returned if 'length' is 0
+    (empty array)
+---*/
+
+function callbackfn(val, idx, obj) {
+  return val > 10;
+}
+
+var obj = {
+  0: 9,
+  1: 8,
+  length: 0
+};
+
+var testResult = Array.prototype.map.call(obj, callbackfn);
+
+assert.sameValue(testResult.length, 0, 'testResult.length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-9-6.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-9-6.js
new file mode 100644
index 0000000000..b595c9646c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-9-6.js
@@ -0,0 +1,24 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: >
+    Array.prototype.map - empty array to be returned if 'length' is 0
+    (subclassed Array, length overridden to null (type conversion))
+---*/
+
+function callbackfn(val, idx, obj) {
+  return val > 10;
+}
+
+var Foo = function() {};
+Foo.prototype = [1, 2, 3];
+var obj = new Foo();
+obj.length = null;
+
+var testResult = Array.prototype.map.call(obj, callbackfn);
+
+assert.sameValue(testResult.length, 0, 'testResult.length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-9-7.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-9-7.js
new file mode 100644
index 0000000000..6611e60e60
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-9-7.js
@@ -0,0 +1,27 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: >
+    Array.prototype.map - empty array to be returned if 'length' is 0
+    (subclassed Array, length overridden to false (type conversion))
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return val > 10;
+}
+
+var Foo = function() {};
+Foo.prototype = [1, 2, 3];
+var obj = new Foo();
+obj.length = false;
+
+var testResult = Array.prototype.map.call(obj, callbackfn);
+
+assert.sameValue(testResult.length, 0, 'testResult.length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-9-8.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-9-8.js
new file mode 100644
index 0000000000..45b51ef3fe
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-9-8.js
@@ -0,0 +1,27 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: >
+    Array.prototype.map - empty array to be returned if 'length' is 0
+    (subclassed Array, length overridden to 0 (type conversion))
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return val > 10;
+}
+
+var Foo = function() {};
+Foo.prototype = [1, 2, 3];
+var obj = new Foo();
+obj.length = 0;
+
+var testResult = Array.prototype.map.call(obj, callbackfn);
+
+assert.sameValue(testResult.length, 0, 'testResult.length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-9-9.js b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-9-9.js
new file mode 100644
index 0000000000..281707b4cd
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/15.4.4.19-9-9.js
@@ -0,0 +1,27 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: >
+    Array.prototype.map - empty array to be returned if 'length' is 0
+    (subclassed Array, length overridden to '0' (type conversion))
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return val > 10;
+}
+
+var Foo = function() {};
+Foo.prototype = [1, 2, 3];
+var obj = new Foo();
+obj.length = '0';
+
+var testResult = Array.prototype.map.call(obj, callbackfn);
+
+assert.sameValue(testResult.length, 0, 'testResult.length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/browser.js b/js/src/tests/test262/built-ins/Array/prototype/map/browser.js
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/call-with-boolean.js b/js/src/tests/test262/built-ins/Array/prototype/map/call-with-boolean.js
new file mode 100644
index 0000000000..b9c8ffe85b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/call-with-boolean.js
@@ -0,0 +1,21 @@
+// Copyright (c) 2020 Rick Waldron.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: Array.prototype.map applied to boolean primitive
+includes: [compareArray.js]
+---*/
+
+assert.compareArray(
+  Array.prototype.map.call(true, () => {}),
+  [],
+  'Array.prototype.map.call(true, () => {}) must return []'
+);
+assert.compareArray(
+  Array.prototype.map.call(false, () => {}),
+  [],
+  'Array.prototype.map.call(false, () => {}) must return []'
+);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/callbackfn-resize-arraybuffer.js b/js/src/tests/test262/built-ins/Array/prototype/map/callbackfn-resize-arraybuffer.js
new file mode 100644
index 0000000000..ec8caa847e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/callbackfn-resize-arraybuffer.js
@@ -0,0 +1,78 @@
+// |reftest| shell-option(--enable-arraybuffer-resizable) skip-if(!ArrayBuffer.prototype.resize||!xulRuntime.shell) -- resizable-arraybuffer is not enabled unconditionally, requires shell-options
+// Copyright (C) 2021 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.map
+description: TypedArray instance buffer can be resized during iteration
+includes: [testTypedArray.js, compareArray.js]
+features: [TypedArray, resizable-arraybuffer]
+---*/
+
+// If the host chooses to throw as allowed by the specification, the observed
+// behavior will be identical to the case where `ArrayBuffer.prototype.resize`
+// has not been implemented. The following assertion prevents this test from
+// passing in runtimes which have not implemented the method.
+assert.sameValue(typeof ArrayBuffer.prototype.resize, 'function');
+
+testWithTypedArrayConstructors(function(TA) {
+  var BPE = TA.BYTES_PER_ELEMENT;
+  var buffer = new ArrayBuffer(BPE * 3, {maxByteLength: BPE * 4});
+  var sample = new TA(buffer);
+  var finalResult, expectedElements, expectedIndices, expectedArrays;
+  var elements, indices, arrays, result;
+
+  elements = [];
+  indices = [];
+  arrays = [];
+  result = Array.prototype.map.call(sample, function(element, index, array) {
+    if (elements.length === 0) {
+      try {
+        buffer.resize(2 * BPE);
+        finalResult = undefined;
+        expectedElements = [0, 0];
+        expectedIndices = [0, 1];
+        expectedArrays = [sample, sample];
+      } catch (_) {
+        finalResult = 2;
+        expectedElements = [0, 0, 0];
+        expectedIndices = [0, 1, 2];
+        expectedArrays = [sample, sample, sample];
+      }
+    }
+
+    elements.push(element);
+    indices.push(index);
+    arrays.push(array);
+
+    return index;
+  });
+
+  assert.compareArray(elements, expectedElements, 'elements (shrink)');
+  assert.compareArray(indices, expectedIndices, 'indices (shrink)');
+  assert.compareArray(arrays, expectedArrays, 'arrays (shrink)');
+  assert.compareArray(result, [0, 1, finalResult], 'result (shrink)');
+
+  elements = [];
+  indices = [];
+  arrays = [];
+  result = Array.prototype.map.call(sample, function(element, index, array) {
+    if (elements.length === 0) {
+      try {
+        buffer.resize(4 * BPE);
+      } catch (_) {}
+    }
+
+    elements.push(element);
+    indices.push(index);
+    arrays.push(array);
+
+    return index;
+  });
+
+  assert.compareArray(elements, expectedElements, 'elements (grow)');
+  assert.compareArray(indices, expectedIndices, 'indices (grow)');
+  assert.compareArray(arrays, expectedArrays, 'arrays (grow)');
+  assert.compareArray(result, expectedIndices, 'result (grow)');
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/create-ctor-non-object.js b/js/src/tests/test262/built-ins/Array/prototype/map/create-ctor-non-object.js
new file mode 100644
index 0000000000..d5ea3a6c51
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/create-ctor-non-object.js
@@ -0,0 +1,53 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.map
+description: >
+    Behavior when `constructor` property is neither an Object nor undefined
+info: |
+    [...]
+    5. Let A be ? ArraySpeciesCreate(O, len).
+    [...]
+
+    9.4.2.3 ArraySpeciesCreate
+
+    [...]
+    5. Let C be ? Get(originalArray, "constructor").
+    [...]
+    9. If IsConstructor(C) is false, throw a TypeError exception.
+---*/
+
+var a = [];
+var callCount = 0;
+var cb = function() {
+  callCount += 0;
+};
+
+a.constructor = null;
+assert.throws(TypeError, function() {
+  a.map(cb);
+}, 'null value');
+assert.sameValue(callCount, 0, 'callback not invoked (null value)');
+
+a = [];
+a.constructor = 1;
+assert.throws(TypeError, function() {
+  a.map(cb);
+}, 'number value');
+assert.sameValue(callCount, 0, 'callback not invoked (number value)');
+
+a = [];
+a.constructor = 'string';
+assert.throws(TypeError, function() {
+  a.map(cb);
+}, 'string value');
+assert.sameValue(callCount, 0, 'callback not invoked (string value)');
+
+a = [];
+a.constructor = true;
+assert.throws(TypeError, function() {
+  a.map(cb);
+}, 'boolean value');
+assert.sameValue(callCount, 0, 'callback not invoked (boolean value)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/create-ctor-poisoned.js b/js/src/tests/test262/built-ins/Array/prototype/map/create-ctor-poisoned.js
new file mode 100644
index 0000000000..1a1e9d46d0
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/create-ctor-poisoned.js
@@ -0,0 +1,34 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.map
+description: Abrupt completion from `constructor` property access
+info: |
+    [...]
+    5. Let A be ? ArraySpeciesCreate(O, len).
+    [...]
+
+    9.4.2.3 ArraySpeciesCreate
+
+    [...]
+    5. Let C be ? Get(originalArray, "constructor").
+---*/
+
+var a = [];
+var callCount = 0;
+var cb = function() {
+  callCount += 1;
+};
+
+Object.defineProperty(a, 'constructor', {
+  get: function() {
+    throw new Test262Error();
+  }
+});
+
+assert.throws(Test262Error, function() {
+  a.map(cb);
+});
+assert.sameValue(callCount, 0);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/create-non-array-invalid-len.js b/js/src/tests/test262/built-ins/Array/prototype/map/create-non-array-invalid-len.js
new file mode 100644
index 0000000000..7fe8312574
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/create-non-array-invalid-len.js
@@ -0,0 +1,41 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.map
+description: Abrupt completion from creating a new array
+info: |
+    [...]
+    5. Let A be ? ArraySpeciesCreate(O, len).
+    [...]
+
+    9.4.2.3 ArraySpeciesCreate
+
+    [...]
+    3. Let isArray be ? IsArray(originalArray).
+    4. If isArray is false, return ? ArrayCreate(length).
+
+    9.4.2.2 ArrayCreate
+
+    [...]
+    3. If length>232-1, throw a RangeError exception.
+---*/
+
+var callCount = 0;
+var obj = {
+  length: Math.pow(2, 32)
+};
+var cb = function() {
+  callCount += 1;
+};
+
+assert.throws(RangeError, function() {
+  Array.prototype.map.call(obj, cb);
+});
+
+assert.sameValue(
+  callCount,
+  0,
+  'RangeError thrown during array creation, not property modification'
+);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/create-non-array.js b/js/src/tests/test262/built-ins/Array/prototype/map/create-non-array.js
new file mode 100644
index 0000000000..1ec3a66d97
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/create-non-array.js
@@ -0,0 +1,35 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.map
+description: Constructor is ignored for non-Array values
+info: |
+    [...]
+    5. Let A be ? ArraySpeciesCreate(O, len).
+    [...]
+
+    9.4.2.3 ArraySpeciesCreate
+
+    [...]
+    3. Let isArray be ? IsArray(originalArray).
+    4. If isArray is false, return ? ArrayCreate(length).
+---*/
+
+var obj = {
+  length: 0
+};
+var callCount = 0;
+var result;
+Object.defineProperty(obj, 'constructor', {
+  get: function() {
+    callCount += 1;
+  }
+});
+
+result = Array.prototype.map.call(obj, function() {});
+
+assert.sameValue(callCount, 0, '`constructor` property not accessed');
+assert.sameValue(Object.getPrototypeOf(result), Array.prototype);
+assert(Array.isArray(result), 'result is an Array exotic object');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/create-proto-from-ctor-realm-array.js b/js/src/tests/test262/built-ins/Array/prototype/map/create-proto-from-ctor-realm-array.js
new file mode 100644
index 0000000000..47f97d04c4
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/create-proto-from-ctor-realm-array.js
@@ -0,0 +1,45 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.map
+description: Prefer Array constructor of current realm record
+info: |
+    1. Let O be ? ToObject(this value).
+    [...]
+    5. Let A be ? ArraySpeciesCreate(O, len).
+    [...]
+
+    9.4.2.3 ArraySpeciesCreate
+
+    [...]
+    5. Let C be ? Get(originalArray, "constructor").
+    6. If IsConstructor(C) is true, then
+       a. Let thisRealm be the current Realm Record.
+       b. Let realmC be ? GetFunctionRealm(C).
+       c. If thisRealm and realmC are not the same Realm Record, then
+          i. If SameValue(C, realmC.[[Intrinsics]].[[%Array%]]) is true, let C
+             be undefined.
+    [...]
+features: [cross-realm, Symbol.species]
+---*/
+
+var array = [];
+var callCount = 0;
+var OArray = $262.createRealm().global.Array;
+var speciesDesc = {
+  get: function() {
+    callCount += 1;
+  }
+};
+var result;
+array.constructor = OArray;
+
+Object.defineProperty(Array, Symbol.species, speciesDesc);
+Object.defineProperty(OArray, Symbol.species, speciesDesc);
+
+result = array.map(function() {});
+
+assert.sameValue(Object.getPrototypeOf(result), Array.prototype);
+assert.sameValue(callCount, 0, 'Species constructor is not referenced');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/create-proto-from-ctor-realm-non-array.js b/js/src/tests/test262/built-ins/Array/prototype/map/create-proto-from-ctor-realm-non-array.js
new file mode 100644
index 0000000000..94e6730e73
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/create-proto-from-ctor-realm-non-array.js
@@ -0,0 +1,46 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.map
+description: Accept non-Array constructors from other realms
+info: |
+    1. Let O be ? ToObject(this value).
+    [...]
+    5. Let A be ? ArraySpeciesCreate(O, len).
+    [...]
+
+    9.4.2.3 ArraySpeciesCreate
+
+    [...]
+    5. Let C be ? Get(originalArray, "constructor").
+    6. If IsConstructor(C) is true, then
+       a. Let thisRealm be the current Realm Record.
+       b. Let realmC be ? GetFunctionRealm(C).
+       c. If thisRealm and realmC are not the same Realm Record, then
+          i. If SameValue(C, realmC.[[Intrinsics]].[[%Array%]]) is true, let C
+             be undefined.
+    [...]
+features: [cross-realm, Symbol.species]
+---*/
+
+var array = [];
+var callCount = 0;
+var CustomCtor = function() {};
+var OObject = $262.createRealm().global.Object;
+var speciesDesc = {
+  get: function() {
+    callCount += 1;
+  }
+};
+var result;
+array.constructor = OObject;
+OObject[Symbol.species] = CustomCtor;
+
+Object.defineProperty(Array, Symbol.species, speciesDesc);
+
+result = array.map(function() {});
+
+assert.sameValue(Object.getPrototypeOf(result), CustomCtor.prototype);
+assert.sameValue(callCount, 0, 'Array species constructor is not referenced');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/create-proxy.js b/js/src/tests/test262/built-ins/Array/prototype/map/create-proxy.js
new file mode 100644
index 0000000000..30b932c079
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/create-proxy.js
@@ -0,0 +1,41 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.map
+description: Species constructor of a Proxy object whose target is an array
+info: |
+    [...]
+    5. Let A be ? ArraySpeciesCreate(O, len).
+    [...]
+    8. Return A.
+
+    9.4.2.3 ArraySpeciesCreate
+
+    [...]
+    3. Let isArray be ? IsArray(originalArray).
+
+    7.2.2 IsArray
+
+    [...]
+    3. If argument is a Proxy exotic object, then
+       a. If the value of the [[ProxyHandler]] internal slot of argument is
+          null, throw a TypeError exception.
+       b. Let target be the value of the [[ProxyTarget]] internal slot of
+          argument.
+       c. Return ? IsArray(target).
+features: [Proxy, Symbol.species]
+---*/
+
+var array = [];
+var proxy = new Proxy(new Proxy(array, {}), {});
+var Ctor = function() {};
+var result;
+
+array.constructor = function() {};
+array.constructor[Symbol.species] = Ctor;
+
+result = Array.prototype.map.call(proxy, function() {});
+
+assert.sameValue(Object.getPrototypeOf(result), Ctor.prototype);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/create-revoked-proxy.js b/js/src/tests/test262/built-ins/Array/prototype/map/create-revoked-proxy.js
new file mode 100644
index 0000000000..03d9ee6e65
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/create-revoked-proxy.js
@@ -0,0 +1,46 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.map
+description: Abrupt completion from constructor that is a revoked Proxy object
+info: |
+    [...]
+    5. Let A be ? ArraySpeciesCreate(O, len).
+    [...]
+
+    9.4.2.3 ArraySpeciesCreate
+
+    [...]
+    3. Let isArray be ? IsArray(originalArray).
+
+    7.2.2 IsArray
+
+    [...]
+    3. If argument is a Proxy exotic object, then
+       a. If the value of the [[ProxyHandler]] internal slot of argument is
+          null, throw a TypeError exception.
+features: [Proxy]
+---*/
+
+var o = Proxy.revocable([], {});
+var ctorCount = 0;
+var cbCount = 0;
+var cb = function() {
+  cbCount += 1;
+};
+
+Object.defineProperty(o.proxy, 'constructor', {
+  get: function() {
+    ctorCount += 1;
+  }
+});
+o.revoke();
+
+assert.throws(TypeError, function() {
+  Array.prototype.map.call(o.proxy, cb);
+});
+
+assert.sameValue(ctorCount, 0, '`constructor` property not accessed');
+assert.sameValue(cbCount, 0, 'callback not invoked');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/create-species-abrupt.js b/js/src/tests/test262/built-ins/Array/prototype/map/create-species-abrupt.js
new file mode 100644
index 0000000000..d6504a2c0f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/create-species-abrupt.js
@@ -0,0 +1,40 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.map
+description: Species constructor returns an abrupt completion
+info: |
+    [...]
+    5. Let A be ? ArraySpeciesCreate(O, len).
+    [...]
+
+    9.4.2.3 ArraySpeciesCreate
+
+    [...]
+    5. Let C be ? Get(originalArray, "constructor").
+    [...]
+    7. If Type(C) is Object, then
+       a. Let C be ? Get(C, @@species).
+       b. If C is null, let C be undefined.
+    [...]
+    10. Return ? Construct(C, « length »).
+features: [Symbol.species]
+---*/
+
+var Ctor = function() {
+  throw new Test262Error();
+};
+var callCount = 0;
+var cb = function() {
+  callCount += 1;
+};
+var a = [];
+a.constructor = {};
+a.constructor[Symbol.species] = Ctor;
+
+assert.throws(Test262Error, function() {
+  a.map(cb);
+});
+assert.sameValue(callCount, 0);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/create-species-non-ctor.js b/js/src/tests/test262/built-ins/Array/prototype/map/create-species-non-ctor.js
new file mode 100644
index 0000000000..35d80e9cd7
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/create-species-non-ctor.js
@@ -0,0 +1,46 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.map
+description: >
+    Behavior when the @@species attribute is a non-constructor object
+info: |
+    [...]
+    5. Let A be ? ArraySpeciesCreate(O, len).
+    [...]
+
+    9.4.2.3 ArraySpeciesCreate
+
+    [...]
+    5. Let C be ? Get(originalArray, "constructor").
+    [...]
+    7. If Type(C) is Object, then
+       a. Let C be ? Get(C, @@species).
+       b. If C is null, let C be undefined.
+    [...]
+    9. If IsConstructor(C) is false, throw a TypeError exception.
+includes: [isConstructor.js]
+features: [Symbol.species, Reflect.construct]
+---*/
+
+assert.sameValue(
+  isConstructor(parseInt),
+  false,
+  'precondition: isConstructor(parseInt) must return false'
+);
+
+var a = [];
+var callCount = 0;
+var cb = function() {
+  callCount += 1;
+};
+
+a.constructor = {};
+a.constructor[Symbol.species] = parseInt;
+
+assert.throws(TypeError, function() {
+  a.map(cb);
+}, 'a.map(cb) throws a TypeError exception');
+assert.sameValue(callCount, 0);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/create-species-null.js b/js/src/tests/test262/built-ins/Array/prototype/map/create-species-null.js
new file mode 100644
index 0000000000..18aecb654e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/create-species-null.js
@@ -0,0 +1,35 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.map
+description: >
+    A null value for the @@species constructor is interpreted as `undefined`
+info: |
+    [...]
+    5. Let A be ? ArraySpeciesCreate(O, len).
+    [...]
+
+    9.4.2.3 ArraySpeciesCreate
+
+    [...]
+    5. Let C be ? Get(originalArray, "constructor").
+    [...]
+    7. If Type(C) is Object, then
+       a. Let C be ? Get(C, @@species).
+       b. If C is null, let C be undefined.
+    8. If C is undefined, return ? ArrayCreate(length).
+features: [Symbol.species]
+---*/
+
+var a = [];
+var result;
+
+a.constructor = {};
+a.constructor[Symbol.species] = null;
+
+result = a.map(function() {});
+
+assert.sameValue(Object.getPrototypeOf(result), Array.prototype);
+assert(Array.isArray(result), 'result is an Array exotic object');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/create-species-poisoned.js b/js/src/tests/test262/built-ins/Array/prototype/map/create-species-poisoned.js
new file mode 100644
index 0000000000..d398b3207c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/create-species-poisoned.js
@@ -0,0 +1,39 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.map
+description: Abrupt completion from `@@species` property access
+info: |
+    [...]
+    5. Let A be ? ArraySpeciesCreate(O, len).
+    [...]
+
+    9.4.2.3 ArraySpeciesCreate
+
+    [...]
+    5. Let C be ? Get(originalArray, "constructor").
+    [...]
+    7. If Type(C) is Object, then
+       a. Let C be ? Get(C, @@species).
+features: [Symbol.species]
+---*/
+
+var a = [];
+var callCount = 0;
+var cb = function() {
+  callCount += 1;
+};
+a.constructor = {};
+
+Object.defineProperty(a.constructor, Symbol.species, {
+  get: function() {
+    throw new Test262Error();
+  }
+});
+
+assert.throws(Test262Error, function() {
+  a.map(cb);
+});
+assert.sameValue(callCount, 0);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/create-species-undef-invalid-len.js b/js/src/tests/test262/built-ins/Array/prototype/map/create-species-undef-invalid-len.js
new file mode 100644
index 0000000000..e3e1f1e7e4
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/create-species-undef-invalid-len.js
@@ -0,0 +1,61 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.map
+description: >
+    An undefined value for the @@species constructor triggers the creation  of
+    an Array exotic object
+info: |
+    [...]
+    5. Let A be ? ArraySpeciesCreate(O, len).
+    [...]
+
+    9.4.2.3 ArraySpeciesCreate
+
+    [...]
+    5. Let C be ? Get(originalArray, "constructor").
+    [...]
+    7. If Type(C) is Object, then
+       a. Let C be ? Get(C, @@species).
+       b. If C is null, let C be undefined.
+    8. If C is undefined, return ? ArrayCreate(length).
+
+    9.4.2.2 ArrayCreate
+
+    [...]
+    3. If length>232-1, throw a RangeError exception.
+features: [Proxy]
+---*/
+
+var array = [];
+var maxLength = Math.pow(2, 32);
+var cbCount = 0;
+var setCount = 0;
+var cb = function() {
+  cbCount += 1;
+};
+var proxy = new Proxy(array, {
+  get: function(_, name) {
+    if (name === 'length') {
+      return maxLength;
+    }
+    return array[name];
+  },
+  set: function() {
+    setCount += 1;
+    return true;
+  }
+});
+
+assert.throws(RangeError, function() {
+  Array.prototype.map.call(proxy, cb);
+});
+
+assert.sameValue(
+  setCount,
+  0,
+  'RangeError thrown during array creation, not property modification'
+);
+assert.sameValue(cbCount, 0, 'callback function not invoked');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/create-species-undef.js b/js/src/tests/test262/built-ins/Array/prototype/map/create-species-undef.js
new file mode 100644
index 0000000000..42bff93c06
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/create-species-undef.js
@@ -0,0 +1,36 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.map
+description: >
+    An undefined value for the @@species constructor triggers the creation  of
+    an Array exotic object
+info: |
+    [...]
+    5. Let A be ? ArraySpeciesCreate(O, len).
+    [...]
+
+    9.4.2.3 ArraySpeciesCreate
+
+    [...]
+    5. Let C be ? Get(originalArray, "constructor").
+    [...]
+    7. If Type(C) is Object, then
+       a. Let C be ? Get(C, @@species).
+       b. If C is null, let C be undefined.
+    8. If C is undefined, return ? ArrayCreate(length).
+features: [Symbol.species]
+---*/
+
+var a = [];
+var result;
+
+a.constructor = {};
+a.constructor[Symbol.species] = undefined;
+
+result = a.map(function() {});
+
+assert.sameValue(Object.getPrototypeOf(result), Array.prototype);
+assert(Array.isArray(result), 'result is an Array exotic object');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/create-species.js b/js/src/tests/test262/built-ins/Array/prototype/map/create-species.js
new file mode 100644
index 0000000000..082a0fd684
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/create-species.js
@@ -0,0 +1,45 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.map
+description: Species constructor is used to create a new instance
+info: |
+    [...]
+    5. Let A be ? ArraySpeciesCreate(O, len).
+    [...]
+
+    9.4.2.3 ArraySpeciesCreate
+
+    [...]
+    5. Let C be ? Get(originalArray, "constructor").
+    [...]
+    7. If Type(C) is Object, then
+       a. Let C be ? Get(C, @@species).
+       b. If C is null, let C be undefined.
+    [...]
+    10. Return ? Construct(C, « length »).
+features: [Symbol.species]
+---*/
+
+var thisValue, args, result;
+var callCount = 0;
+var instance = [];
+var Ctor = function() {
+  callCount += 1;
+  thisValue = this;
+  args = arguments;
+  return instance;
+};
+var a = [1, 2, 3, 4, 5];
+a.constructor = {};
+a.constructor[Symbol.species] = Ctor;
+
+result = a.map(function() {});
+
+assert.sameValue(callCount, 1, 'Constructor invoked exactly once');
+assert.sameValue(Object.getPrototypeOf(thisValue), Ctor.prototype);
+assert.sameValue(args.length, 1, 'Constructor invoked with a single argument');
+assert.sameValue(args[0], 5);
+assert.sameValue(result, instance);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/length.js b/js/src/tests/test262/built-ins/Array/prototype/map/length.js
new file mode 100644
index 0000000000..f0402be9c5
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/length.js
@@ -0,0 +1,30 @@
+// Copyright (C) 2017 Leo Balter. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: >
+  The "length" property of Array.prototype.map
+info: |
+  17 ECMAScript Standard Built-in Objects
+
+  Every built-in function object, including constructors, has a length property
+  whose value is an integer. Unless otherwise specified, this value is equal to
+  the largest number of named arguments shown in the subclause headings for the
+  function description. Optional parameters (which are indicated with brackets:
+  [ ]) or rest parameters (which are shown using the form «...name») are not
+  included in the default argument count.
+
+  Unless otherwise specified, the length property of a built-in function object
+  has the attributes { [[Writable]]: false, [[Enumerable]]: false,
+    [[Configurable]]: true }.
+includes: [propertyHelper.js]
+---*/
+
+assert.sameValue(Array.prototype.map.length, 1);
+
+verifyNotEnumerable(Array.prototype.map, 'length');
+verifyNotWritable(Array.prototype.map, 'length');
+verifyConfigurable(Array.prototype.map, 'length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/name.js b/js/src/tests/test262/built-ins/Array/prototype/map/name.js
new file mode 100644
index 0000000000..75a94bbb83
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/name.js
@@ -0,0 +1,28 @@
+// Copyright (C) 2015 André Bargull. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: >
+  Array.prototype.map.name is "map".
+info: |
+  Array.prototype.map ( callbackfn [ , thisArg ] )
+
+  17 ECMAScript Standard Built-in Objects:
+    Every built-in Function object, including constructors, that is not
+    identified as an anonymous function has a name property whose value
+    is a String.
+
+    Unless otherwise specified, the name property of a built-in Function
+    object, if it exists, has the attributes { [[Writable]]: false,
+    [[Enumerable]]: false, [[Configurable]]: true }.
+includes: [propertyHelper.js]
+---*/
+
+assert.sameValue(Array.prototype.map.name, "map");
+
+verifyNotEnumerable(Array.prototype.map, "name");
+verifyNotWritable(Array.prototype.map, "name");
+verifyConfigurable(Array.prototype.map, "name");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/not-a-constructor.js b/js/src/tests/test262/built-ins/Array/prototype/map/not-a-constructor.js
new file mode 100644
index 0000000000..98945bd366
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/not-a-constructor.js
@@ -0,0 +1,31 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Array.prototype.map does not implement [[Construct]], is not new-able
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+
+  sec-evaluatenew
+
+  ...
+  7. If IsConstructor(constructor) is false, throw a TypeError exception.
+  ...
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(isConstructor(Array.prototype.map), false, 'isConstructor(Array.prototype.map) must return false');
+
+assert.throws(TypeError, () => {
+  new Array.prototype.map(() => {});
+}, '`new Array.prototype.map(() => {})` throws TypeError');
+
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/prop-desc.js b/js/src/tests/test262/built-ins/Array/prototype/map/prop-desc.js
new file mode 100644
index 0000000000..e99759506b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/prop-desc.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2017 Leo Balter. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: >
+  "map" property of Array.prototype
+info: |
+  17 ECMAScript Standard Built-in Objects
+  
+  Every other data property described in clauses 18 through 26 and in Annex B.2
+  has the attributes { [[Writable]]: true, [[Enumerable]]: false,
+    [[Configurable]]: true } unless otherwise specified.
+includes: [propertyHelper.js]
+---*/
+
+assert.sameValue(typeof Array.prototype.map, 'function', 'typeof');
+
+verifyNotEnumerable(Array.prototype, "map");
+verifyWritable(Array.prototype, "map");
+verifyConfigurable(Array.prototype, "map");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/shell.js b/js/src/tests/test262/built-ins/Array/prototype/map/shell.js
new file mode 100644
index 0000000000..05fecd6ef1
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/shell.js
@@ -0,0 +1,161 @@
+// GENERATED, DO NOT EDIT
+// file: testTypedArray.js
+// Copyright (C) 2015 André Bargull. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+description: |
+    Collection of functions used to assert the correctness of TypedArray objects.
+defines:
+  - floatArrayConstructors
+  - nonClampedIntArrayConstructors
+  - intArrayConstructors
+  - typedArrayConstructors
+  - TypedArray
+  - testWithTypedArrayConstructors
+  - nonAtomicsFriendlyTypedArrayConstructors
+  - testWithAtomicsFriendlyTypedArrayConstructors
+  - testWithNonAtomicsFriendlyTypedArrayConstructors
+  - testTypedArrayConversions
+---*/
+
+var floatArrayConstructors = [
+  Float64Array,
+  Float32Array
+];
+
+var nonClampedIntArrayConstructors = [
+  Int32Array,
+  Int16Array,
+  Int8Array,
+  Uint32Array,
+  Uint16Array,
+  Uint8Array
+];
+
+var intArrayConstructors = nonClampedIntArrayConstructors.concat([Uint8ClampedArray]);
+
+// Float16Array is a newer feature
+// adding it to this list unconditionally would cause implementations lacking it to fail every test which uses it
+if (typeof Float16Array !== 'undefined') {
+  floatArrayConstructors.push(Float16Array);
+}
+
+/**
+ * Array containing every non-bigint typed array constructor.
+ */
+
+var typedArrayConstructors = floatArrayConstructors.concat(intArrayConstructors);
+
+/**
+ * The %TypedArray% intrinsic constructor function.
+ */
+var TypedArray = Object.getPrototypeOf(Int8Array);
+
+/**
+ * Callback for testing a typed array constructor.
+ *
+ * @callback typedArrayConstructorCallback
+ * @param {Function} Constructor the constructor object to test with.
+ */
+
+/**
+ * Calls the provided function for every typed array constructor.
+ *
+ * @param {typedArrayConstructorCallback} f - the function to call for each typed array constructor.
+ * @param {Array} selected - An optional Array with filtered typed arrays
+ */
+function testWithTypedArrayConstructors(f, selected) {
+  var constructors = selected || typedArrayConstructors;
+  for (var i = 0; i < constructors.length; ++i) {
+    var constructor = constructors[i];
+    try {
+      f(constructor);
+    } catch (e) {
+      e.message += " (Testing with " + constructor.name + ".)";
+      throw e;
+    }
+  }
+}
+
+var nonAtomicsFriendlyTypedArrayConstructors = floatArrayConstructors.concat([Uint8ClampedArray]);
+/**
+ * Calls the provided function for every non-"Atomics Friendly" typed array constructor.
+ *
+ * @param {typedArrayConstructorCallback} f - the function to call for each typed array constructor.
+ * @param {Array} selected - An optional Array with filtered typed arrays
+ */
+function testWithNonAtomicsFriendlyTypedArrayConstructors(f) {
+  testWithTypedArrayConstructors(f, nonAtomicsFriendlyTypedArrayConstructors);
+}
+
+/**
+ * Calls the provided function for every "Atomics Friendly" typed array constructor.
+ *
+ * @param {typedArrayConstructorCallback} f - the function to call for each typed array constructor.
+ * @param {Array} selected - An optional Array with filtered typed arrays
+ */
+function testWithAtomicsFriendlyTypedArrayConstructors(f) {
+  testWithTypedArrayConstructors(f, [
+    Int32Array,
+    Int16Array,
+    Int8Array,
+    Uint32Array,
+    Uint16Array,
+    Uint8Array,
+  ]);
+}
+
+/**
+ * Helper for conversion operations on TypedArrays, the expected values
+ * properties are indexed in order to match the respective value for each
+ * TypedArray constructor
+ * @param  {Function} fn - the function to call for each constructor and value.
+ *                         will be called with the constructor, value, expected
+ *                         value, and a initial value that can be used to avoid
+ *                         a false positive with an equivalent expected value.
+ */
+function testTypedArrayConversions(byteConversionValues, fn) {
+  var values = byteConversionValues.values;
+  var expected = byteConversionValues.expected;
+
+  testWithTypedArrayConstructors(function(TA) {
+    var name = TA.name.slice(0, -5);
+
+    return values.forEach(function(value, index) {
+      var exp = expected[name][index];
+      var initial = 0;
+      if (exp === 0) {
+        initial = 1;
+      }
+      fn(TA, value, exp, initial);
+    });
+  });
+}
+
+/**
+ * Checks if the given argument is one of the float-based TypedArray constructors.
+ *
+ * @param {constructor} ctor - the value to check
+ * @returns {boolean}
+ */
+function isFloatTypedArrayConstructor(arg) {
+  return floatArrayConstructors.indexOf(arg) !== -1;
+}
+
+/**
+ * Determines the precision of the given float-based TypedArray constructor.
+ *
+ * @param {constructor} ctor - the value to check
+ * @returns {string} "half", "single", or "double" for Float16Array, Float32Array, and Float64Array respectively.
+ */
+function floatTypedArrayConstructorPrecision(FA) {
+  if (typeof Float16Array !== "undefined" && FA === Float16Array) {
+    return "half";
+  } else if (FA === Float32Array) {
+    return "single";
+  } else if (FA === Float64Array) {
+    return "double";
+  } else {
+    throw new Error("Malformed test - floatTypedArrayConstructorPrecision called with non-float TypedArray");
+  }
+}
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/target-array-non-extensible.js b/js/src/tests/test262/built-ins/Array/prototype/map/target-array-non-extensible.js
new file mode 100644
index 0000000000..b090aa6942
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/target-array-non-extensible.js
@@ -0,0 +1,41 @@
+// Copyright (C) 2020 Alexey Shvayka. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: >
+  TypeError is thrown if CreateDataProperty fails.
+  (result object is non-extensible)
+info: |
+  Array.prototype.map ( callbackfn [ , thisArg ] )
+
+  [...]
+  6. Repeat, while k < len
+    [...]
+    c. If kPresent is true, then
+      [...]
+      iii. Perform ? CreateDataPropertyOrThrow(A, Pk, mappedValue).
+    [...]
+
+  CreateDataPropertyOrThrow ( O, P, V )
+
+  [...]
+  3. Let success be ? CreateDataProperty(O, P, V).
+  4. If success is false, throw a TypeError exception.
+features: [Symbol.species]
+---*/
+
+var A = function(_length) {
+  this.length = 0;
+  Object.preventExtensions(this);
+};
+
+var arr = [1];
+arr.constructor = {};
+arr.constructor[Symbol.species] = A;
+
+assert.throws(TypeError, function() {
+  arr.map(function() {});
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/target-array-with-non-configurable-property.js b/js/src/tests/test262/built-ins/Array/prototype/map/target-array-with-non-configurable-property.js
new file mode 100644
index 0000000000..f3f563674f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/target-array-with-non-configurable-property.js
@@ -0,0 +1,43 @@
+// Copyright (C) 2020 Alexey Shvayka. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: >
+  TypeError is thrown if CreateDataProperty fails.
+  (result object's "0" is non-configurable)
+info: |
+  Array.prototype.map ( callbackfn [ , thisArg ] )
+
+  [...]
+  6. Repeat, while k < len
+    [...]
+    c. If kPresent is true, then
+      [...]
+      iii. Perform ? CreateDataPropertyOrThrow(A, Pk, mappedValue).
+    [...]
+
+  CreateDataPropertyOrThrow ( O, P, V )
+
+  [...]
+  3. Let success be ? CreateDataProperty(O, P, V).
+  4. If success is false, throw a TypeError exception.
+features: [Symbol.species]
+---*/
+
+var A = function(_length) {
+  Object.defineProperty(this, "0", {
+    set: function(_value) {},
+    configurable: false,
+  });
+};
+
+var arr = [1];
+arr.constructor = {};
+arr.constructor[Symbol.species] = A;
+
+assert.throws(TypeError, function() {
+  arr.map(function() {});
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/map/target-array-with-non-writable-property.js b/js/src/tests/test262/built-ins/Array/prototype/map/target-array-with-non-writable-property.js
new file mode 100644
index 0000000000..c8761fb5d8
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/map/target-array-with-non-writable-property.js
@@ -0,0 +1,38 @@
+// Copyright (C) 2018 André Bargull. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.map
+description: >
+  Non-writable properties are overwritten by CreateDataPropertyOrThrow.
+info: |
+  22.1.3.16 Array.prototype.map ( callbackfn [ , thisArg ] )
+
+  ...
+  7. Repeat, while k < len
+    ...
+    c. If kPresent is true, then
+      ...
+      iii. Perform ? CreateDataPropertyOrThrow(A, Pk, mappedValue).
+    ...
+features: [Symbol.species]
+includes: [propertyHelper.js]
+---*/
+
+var a = [1];
+a.constructor = {};
+a.constructor[Symbol.species] = function(len) {
+    var q = new Array(0);
+    Object.defineProperty(q, 0, {
+        value: 0, writable: false, configurable: true, enumerable: false,
+    });
+    return q;
+};
+
+var r = a.map(function(){ return 2; });
+
+verifyProperty(r, 0, {
+    value: 2, writable: true, configurable: true, enumerable: true,
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/methods-called-as-functions.js b/js/src/tests/test262/built-ins/Array/prototype/methods-called-as-functions.js
new file mode 100644
index 0000000000..7130ad549d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/methods-called-as-functions.js
@@ -0,0 +1,205 @@
+// Copyright (C) 2020 Alexey Shvayka. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-properties-of-the-array-prototype-object
+description: >
+    Array.prototype methods resolve `this` value using strict mode semantics,
+    throwing TypeError if called as top-level function.
+info: |
+    Array.prototype.concat ( ...items )
+
+    1. Let O be ? ToObject(this value).
+
+    ToObject ( argument )
+
+    Argument Type: Undefined
+    Result: Throw a TypeError exception.
+features: [Symbol, Symbol.isConcatSpreadable, Symbol.iterator, Symbol.species, Array.prototype.flat, Array.prototype.flatMap, Array.prototype.includes]
+---*/
+
+["constructor", "length", "0", Symbol.isConcatSpreadable, Symbol.species].forEach(function(key) {
+    Object.defineProperty(this, key, {
+        get: function() {
+            throw new Test262Error(String(key) + " lookup should not be performed");
+        },
+    });
+}, this);
+
+function callback() {
+    throw new Test262Error("callback should not be called");
+}
+
+var index = {
+    get valueOf() {
+        throw new Test262Error("index should not be coerced to number");
+    },
+};
+
+var separator = {
+    get toString() {
+        throw new Test262Error("separator should not be coerced to string");
+    },
+};
+
+var concat = Array.prototype.concat;
+assert.throws(TypeError, function() {
+    concat();
+}, "concat");
+
+var copyWithin = Array.prototype.copyWithin;
+assert.throws(TypeError, function() {
+    copyWithin(index, index);
+}, "copyWithin");
+
+var entries = Array.prototype.entries;
+assert.throws(TypeError, function() {
+    entries();
+}, "entries");
+
+var every = Array.prototype.every;
+assert.throws(TypeError, function() {
+    every(callback);
+}, "every");
+
+var fill = Array.prototype.fill;
+assert.throws(TypeError, function() {
+    fill(0);
+}, "fill");
+
+var filter = Array.prototype.filter;
+assert.throws(TypeError, function() {
+    filter(callback);
+}, "filter");
+
+var find = Array.prototype.find;
+assert.throws(TypeError, function() {
+    find(callback);
+}, "find");
+
+var findIndex = Array.prototype.findIndex;
+assert.throws(TypeError, function() {
+    findIndex(callback);
+}, "findIndex");
+
+var flat = Array.prototype.flat;
+assert.throws(TypeError, function() {
+    flat(index);
+}, "flat");
+
+var flatMap = Array.prototype.flatMap;
+assert.throws(TypeError, function() {
+    flatMap(callback);
+}, "flatMap");
+
+var forEach = Array.prototype.forEach;
+assert.throws(TypeError, function() {
+    forEach(callback);
+}, "forEach");
+
+var includes = Array.prototype.includes;
+assert.throws(TypeError, function() {
+    includes(0, index);
+}, "includes");
+
+var indexOf = Array.prototype.indexOf;
+assert.throws(TypeError, function() {
+    indexOf(0, index);
+}, "indexOf");
+
+var join = Array.prototype.join;
+assert.throws(TypeError, function() {
+    join(separator);
+}, "join");
+
+var keys = Array.prototype.keys;
+assert.throws(TypeError, function() {
+    keys();
+}, "keys");
+
+var lastIndexOf = Array.prototype.lastIndexOf;
+assert.throws(TypeError, function() {
+    lastIndexOf(0, index);
+}, "lastIndexOf");
+
+var map = Array.prototype.map;
+assert.throws(TypeError, function() {
+    map(callback);
+}, "map");
+
+var pop = Array.prototype.pop;
+assert.throws(TypeError, function() {
+    pop();
+}, "pop");
+
+var push = Array.prototype.push;
+assert.throws(TypeError, function() {
+    push();
+}, "push");
+
+var reduce = Array.prototype.reduce;
+assert.throws(TypeError, function() {
+    reduce(callback, 0);
+}, "reduce");
+
+var reduceRight = Array.prototype.reduceRight;
+assert.throws(TypeError, function() {
+    reduceRight(callback, 0);
+}, "reduceRight");
+
+var reverse = Array.prototype.reverse;
+assert.throws(TypeError, function() {
+    reverse();
+}, "reverse");
+
+var shift = Array.prototype.shift;
+assert.throws(TypeError, function() {
+    shift();
+}, "shift");
+
+var slice = Array.prototype.slice;
+assert.throws(TypeError, function() {
+    slice(index, index);
+}, "slice");
+
+var some = Array.prototype.some;
+assert.throws(TypeError, function() {
+    some(callback);
+}, "some");
+
+var sort = Array.prototype.sort;
+assert.throws(TypeError, function() {
+    sort(callback);
+}, "sort");
+
+var splice = Array.prototype.splice;
+assert.throws(TypeError, function() {
+    splice(index, index);
+}, "splice");
+
+var toLocaleString = Array.prototype.toLocaleString;
+assert.throws(TypeError, function() {
+    toLocaleString();
+}, "toLocaleString");
+
+var toString = Array.prototype.toString;
+assert.throws(TypeError, function() {
+    toString();
+}, "toString");
+
+var unshift = Array.prototype.unshift;
+assert.throws(TypeError, function() {
+    unshift();
+}, "unshift");
+
+var values = Array.prototype.values;
+assert.throws(TypeError, function() {
+    values();
+}, "values");
+
+var iterator = Array.prototype[Symbol.iterator];
+assert.throws(TypeError, function() {
+    iterator();
+}, "Symbol.iterator");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/pop/S15.4.4.6_A1.1_T1.js b/js/src/tests/test262/built-ins/Array/prototype/pop/S15.4.4.6_A1.1_T1.js
new file mode 100644
index 0000000000..6463da32cc
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/pop/S15.4.4.6_A1.1_T1.js
@@ -0,0 +1,33 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    If length equal zero, call the [[Put]] method of this object
+    with arguments "length" and 0 and return undefined
+esid: sec-array.prototype.pop
+description: Checking this algorithm
+---*/
+
+var x = new Array();
+var pop = x.pop();
+if (pop !== undefined) {
+  throw new Test262Error('#1: var x = new Array(); x.pop() === undefined. Actual: ' + (pop));
+}
+
+if (x.length !== 0) {
+  throw new Test262Error('#2: var x = new Array(); x.pop(); x.length === 0. Actual: ' + (x.length));
+}
+
+var x = Array(1, 2, 3);
+x.length = 0;
+var pop = x.pop();
+if (pop !== undefined) {
+  throw new Test262Error('#2: var x = Array(1,2,3); x.length = 0; x.pop() === undefined. Actual: ' + (pop));
+}
+
+if (x.length !== 0) {
+  throw new Test262Error('#4: var x = new Array(1,2,3); x.length = 0; x.pop(); x.length === 0. Actual: ' + (x.length));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/pop/S15.4.4.6_A1.2_T1.js b/js/src/tests/test262/built-ins/Array/prototype/pop/S15.4.4.6_A1.2_T1.js
new file mode 100644
index 0000000000..97cab3dc1e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/pop/S15.4.4.6_A1.2_T1.js
@@ -0,0 +1,60 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    The last element of the array is removed from the array
+    and returned
+esid: sec-array.prototype.pop
+description: Checking this use new Array() and []
+---*/
+
+var x = new Array(0, 1, 2, 3);
+var pop = x.pop();
+if (pop !== 3) {
+  throw new Test262Error('#1: x = new Array(0,1,2,3); x.pop() === 3. Actual: ' + (pop));
+}
+
+if (x.length !== 3) {
+  throw new Test262Error('#2: x = new Array(0,1,2,3); x.pop(); x.length == 3');
+}
+
+if (x[3] !== undefined) {
+  throw new Test262Error('#3: x = new Array(0,1,2,3); x.pop(); x[3] == undefined');
+}
+
+if (x[2] !== 2) {
+  throw new Test262Error('#4: x = new Array(0,1,2,3); x.pop(); x[2] == 2');
+}
+
+x = [];
+x[0] = 0;
+x[3] = 3;
+var pop = x.pop();
+if (pop !== 3) {
+  throw new Test262Error('#5: x = []; x[0] = 0; x[3] = 3; x.pop() === 3. Actual: ' + (pop));
+}
+
+if (x.length !== 3) {
+  throw new Test262Error('#6: x = []; x[0] = 0; x[3] = 3; x.pop(); x.length == 3');
+}
+
+if (x[3] !== undefined) {
+  throw new Test262Error('#7: x = []; x[0] = 0; x[3] = 3; x.pop(); x[3] == undefined');
+}
+
+if (x[2] !== undefined) {
+  throw new Test262Error('#8: x = []; x[0] = 0; x[3] = 3; x.pop(); x[2] == undefined');
+}
+
+x.length = 1;
+var pop = x.pop();
+if (pop !== 0) {
+  throw new Test262Error('#9: x = []; x[0] = 0; x[3] = 3; x.pop(); x.length = 1; x.pop() === 0. Actual: ' + (pop));
+}
+
+if (x.length !== 0) {
+  throw new Test262Error('#10: x = []; x[0] = 0; x[3] = 3; x.pop(); x.length = 1; x.pop(); x.length === 0. Actual: ' + (x.length));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/pop/S15.4.4.6_A2_T1.js b/js/src/tests/test262/built-ins/Array/prototype/pop/S15.4.4.6_A2_T1.js
new file mode 100644
index 0000000000..9961c4733a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/pop/S15.4.4.6_A2_T1.js
@@ -0,0 +1,49 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    The pop function is intentionally generic.
+    It does not require that its this value be an Array object
+esid: sec-array.prototype.pop
+description: >
+    If ToUint32(length) equal zero, call the [[Put]] method  of this
+    object with arguments "length" and 0 and return undefined
+---*/
+
+var obj = {};
+obj.pop = Array.prototype.pop;
+
+if (obj.length !== undefined) {
+  throw new Test262Error('#0: var obj = {}; obj.length === undefined. Actual: ' + (obj.length));
+} else {
+  var pop = obj.pop();
+  if (pop !== undefined) {
+    throw new Test262Error('#1: var obj = {}; obj.pop = Array.prototype.pop; obj.pop() === undefined. Actual: ' + (pop));
+  }
+  if (obj.length !== 0) {
+    throw new Test262Error('#2: var obj = {}; obj.pop = Array.prototype.pop; obj.pop(); obj.length === 0. Actual: ' + (obj.length));
+  }
+}
+
+obj.length = undefined;
+var pop = obj.pop();
+if (pop !== undefined) {
+  throw new Test262Error('#3: var obj = {}; obj.length = undefined; obj.pop = Array.prototype.pop; obj.pop() === undefined. Actual: ' + (pop));
+}
+
+if (obj.length !== 0) {
+  throw new Test262Error('#4: var obj = {}; obj.length = undefined; obj.pop = Array.prototype.pop; obj.pop(); obj.length === 0. Actual: ' + (obj.length));
+}
+
+obj.length = null
+var pop = obj.pop();
+if (pop !== undefined) {
+  throw new Test262Error('#5: var obj = {}; obj.length = null; obj.pop = Array.prototype.pop; obj.pop() === undefined. Actual: ' + (pop));
+}
+
+if (obj.length !== 0) {
+  throw new Test262Error('#6: var obj = {}; obj.length = null; obj.pop = Array.prototype.pop; obj.pop(); obj.length === 0. Actual: ' + (obj.length));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/pop/S15.4.4.6_A2_T2.js b/js/src/tests/test262/built-ins/Array/prototype/pop/S15.4.4.6_A2_T2.js
new file mode 100644
index 0000000000..f414f4d00a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/pop/S15.4.4.6_A2_T2.js
@@ -0,0 +1,81 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    The pop function is intentionally generic.
+    It does not require that its this value be an Array object
+esid: sec-array.prototype.pop
+description: >
+    If ToUint32(length) equal zero, call the [[Put]] method  of this
+    object with arguments "length" and 0 and return undefined
+---*/
+
+var obj = {};
+obj.pop = Array.prototype.pop;
+
+obj.length = NaN;
+var pop = obj.pop();
+if (pop !== undefined) {
+  throw new Test262Error('#1: var obj = {}; obj.length = NaN; obj.pop = Array.prototype.pop; obj.pop() === undefined. Actual: ' + (pop));
+}
+
+if (obj.length !== 0) {
+  throw new Test262Error('#2: var obj = {}; obj.length = NaN; obj.pop = Array.prototype.pop; obj.pop(); obj.length === 0. Actual: ' + (obj.length));
+}
+
+obj.length = Number.POSITIVE_INFINITY;
+var pop = obj.pop();
+if (pop !== undefined) {
+  throw new Test262Error('#3: var obj = {}; obj.length = Number.POSITIVE_INFINITY; obj.pop = Array.prototype.pop; obj.pop() === undefined. Actual: ' + (pop));
+}
+
+if (obj.length !== 9007199254740990) {
+  throw new Test262Error('#4: var obj = {}; obj.length = Number.POSITIVE_INFINITY; obj.pop = Array.prototype.pop; obj.pop(); obj.length === 9007199254740990. Actual: ' + (obj.length));
+}
+
+obj.length = Number.NEGATIVE_INFINITY;
+var pop = obj.pop();
+if (pop !== undefined) {
+  throw new Test262Error('#5: var obj = {}; obj.length = Number.NEGATIVE_INFINITY; obj.pop = Array.prototype.pop; obj.pop() === undefined. Actual: ' + (pop));
+}
+
+if (obj.length !== 0) {
+  throw new Test262Error('#6: var obj = {}; obj.length = Number.NEGATIVE_INFINITY; obj.pop = Array.prototype.pop; obj.pop(); obj.length === 0. Actual: ' + (obj.length));
+}
+
+obj.length = -0;
+var pop = obj.pop();
+if (pop !== undefined) {
+  throw new Test262Error('#7: var obj = {}; obj.length = -0; obj.pop = Array.prototype.pop; obj.pop() === undefined. Actual: ' + (pop));
+}
+
+if (obj.length !== 0) {
+  throw new Test262Error('#8: var obj = {}; obj.length = -0; obj.pop = Array.prototype.pop; obj.pop(); obj.length === 0. Actual: ' + (obj.length));
+} else {
+  if (1 / obj.length !== Number.POSITIVE_INFINITY) {
+    throw new Test262Error('#8: var obj = {}; obj.length = -0; obj.pop = Array.prototype.pop; obj.pop(); obj.length === +0. Actual: ' + (obj.length));
+  }
+}
+
+obj.length = 0.5;
+var pop = obj.pop();
+if (pop !== undefined) {
+  throw new Test262Error('#9: var obj = {}; obj.length = 0.5; obj.pop = Array.prototype.pop; obj.pop() === undefined. Actual: ' + (pop));
+}
+
+if (obj.length !== 0) {
+  throw new Test262Error('#10: var obj = {}; obj.length = 0.5; obj.pop = Array.prototype.pop; obj.pop(); obj.length === 0. Actual: ' + (obj.length));
+}
+
+obj.length = new Number(0);
+var pop = obj.pop();
+if (pop !== undefined) {
+  throw new Test262Error('#11: var obj = {}; obj.length = new Number(0); obj.pop = Array.prototype.pop; obj.pop() === undefined. Actual: ' + (pop));
+}
+
+if (obj.length !== 0) {
+  throw new Test262Error('#12: var obj = {}; obj.length = new Number(0); obj.pop = Array.prototype.pop; obj.pop(); obj.length === 0. Actual: ' + (obj.length));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/pop/S15.4.4.6_A2_T3.js b/js/src/tests/test262/built-ins/Array/prototype/pop/S15.4.4.6_A2_T3.js
new file mode 100644
index 0000000000..74df6b3500
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/pop/S15.4.4.6_A2_T3.js
@@ -0,0 +1,37 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    The pop function is intentionally generic.
+    It does not require that its this value be an Array object
+esid: sec-array.prototype.pop
+description: >
+    The last element ToUint32(length) - 1 of the array is removed from
+    the array  and returned
+---*/
+
+var obj = {};
+obj.pop = Array.prototype.pop;
+
+obj.length = 2.5;
+var pop = obj.pop();
+if (pop !== undefined) {
+  throw new Test262Error('#1: var obj = {}; obj.length = 2.5; obj.pop = Array.prototype.pop; obj.pop() === undefined. Actual: ' + (pop));
+}
+
+if (obj.length !== 1) {
+  throw new Test262Error('#2: var obj = {}; obj.length = 2.5; obj.pop = Array.prototype.pop; obj.pop(); obj.length === 1. Actual: ' + (obj.length));
+}
+
+obj.length = new Number(2);
+var pop = obj.pop();
+if (pop !== undefined) {
+  throw new Test262Error('#11: var obj = {}; obj.length = new Number(2); obj.pop = Array.prototype.pop; obj.pop() === undefined. Actual: ' + (pop));
+}
+
+if (obj.length !== 1) {
+  throw new Test262Error('#12: var obj = {}; obj.length = new Number(2); obj.pop = Array.prototype.pop; obj.pop(); obj.length === 1. Actual: ' + (obj.length));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/pop/S15.4.4.6_A2_T4.js b/js/src/tests/test262/built-ins/Array/prototype/pop/S15.4.4.6_A2_T4.js
new file mode 100644
index 0000000000..d37f8024d5
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/pop/S15.4.4.6_A2_T4.js
@@ -0,0 +1,126 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    The pop function is intentionally generic.
+    It does not require that its this value be an Array object
+esid: sec-array.prototype.pop
+description: >
+    Operator use ToNumber from length.  If Type(value) is Object,
+    evaluate ToPrimitive(value, Number)
+---*/
+
+var obj = {};
+obj.pop = Array.prototype.pop;
+
+obj[0] = -1;
+obj.length = {
+  valueOf() {
+    return 1
+  }
+};
+var pop = obj.pop();
+assert.sameValue(pop, -1, 'The value of pop is expected to be -1');
+
+obj[0] = -1;
+obj.length = {
+  valueOf() {
+    return 1
+  },
+  toString() {
+    return 0
+  }
+};
+var pop = obj.pop();
+assert.sameValue(pop, -1, 'The value of pop is expected to be -1');
+
+obj[0] = -1;
+obj.length = {
+  valueOf() {
+    return 1
+  },
+  toString() {
+    return {}
+  }
+};
+var pop = obj.pop();
+assert.sameValue(pop, -1, 'The value of pop is expected to be -1');
+
+try {
+  obj[0] = -1;
+  obj.length = {
+    valueOf() {
+      return 1
+    },
+    toString() {
+      throw "error"
+    }
+  };
+  var pop = obj.pop();
+  assert.sameValue(pop, -1, 'The value of pop is expected to be -1');
+}
+catch (e) {
+  assert.notSameValue(e, "error", 'The value of e is not "error"');
+}
+
+obj[0] = -1;
+obj.length = {
+  toString() {
+    return 0
+  }
+};
+var pop = obj.pop();
+assert.sameValue(pop, undefined, 'The value of pop is expected to equal undefined');
+
+obj[0] = -1;
+obj.length = {
+  valueOf() {
+    return {}
+  },
+  toString() {
+    return 0
+  }
+}
+var pop = obj.pop();
+assert.sameValue(pop, undefined, 'The value of pop is expected to equal undefined');
+
+try {
+  obj[0] = -1;
+  obj.length = {
+    valueOf() {
+      throw "error"
+    },
+    toString() {
+      return 0
+    }
+  };
+  var pop = obj.pop();
+  throw new Test262Error('#7.1: obj[0] = -1; obj.length = {valueOf() {throw "error"}, toString() {return 0}}; obj.pop() throw "error". Actual: ' + (pop));
+}
+catch (e) {
+  assert.sameValue(e, "error", 'The value of e is expected to be "error"');
+}
+
+try {
+  obj[0] = -1;
+  obj.length = {
+    valueOf() {
+      return {}
+    },
+    toString() {
+      return {}
+    }
+  };
+  var pop = obj.pop();
+  throw new Test262Error('#8.1: obj[0] = -1; obj.length = {valueOf() {return {}}, toString() {return {}}}  obj.pop() throw TypeError. Actual: ' + (pop));
+}
+catch (e) {
+  assert.sameValue(
+    e instanceof TypeError,
+    true,
+    'The result of evaluating (e instanceof TypeError) is expected to be true'
+  );
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/pop/S15.4.4.6_A3_T1.js b/js/src/tests/test262/built-ins/Array/prototype/pop/S15.4.4.6_A3_T1.js
new file mode 100644
index 0000000000..7c0ce497dc
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/pop/S15.4.4.6_A3_T1.js
@@ -0,0 +1,33 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: Check ToLength(length) for non Array objects
+esid: sec-array.prototype.pop
+description: length = 4294967296
+---*/
+
+var obj = {};
+obj.pop = Array.prototype.pop;
+obj[0] = "x";
+obj[4294967295] = "y";
+obj.length = 4294967296;
+
+var pop = obj.pop();
+if (pop !== "y") {
+  throw new Test262Error('#1: var obj = {}; obj.pop = Array.prototype.pop; obj[0] = "x"; obj[4294967295] = "y"; obj.length = 4294967296; obj.pop() === "y". Actual: ' + (pop));
+}
+
+if (obj.length !== 4294967295) {
+  throw new Test262Error('#2: var obj = {}; obj.pop = Array.prototype.pop; obj[0] = "x"; obj[4294967295] = "y"; obj.length = 4294967296; obj.pop(); obj.length === 4294967295. Actual: ' + (obj.length));
+}
+
+if (obj[0] !== "x") {
+  throw new Test262Error('#3: var obj = {}; obj.pop = Array.prototype.pop; obj[0] = "x"; obj[4294967295] = "y"; obj.length = 4294967296; obj.pop(); obj[0] === "x". Actual: ' + (obj[0]));
+}
+
+if (obj[4294967295] !== undefined) {
+  throw new Test262Error('#4: var obj = {}; obj.pop = Array.prototype.pop; obj[0] = "x"; obj[4294967295] = "y"; obj.length = 4294967296; obj.pop(); obj[4294967295] === undefined. Actual: ' + (obj[4294967295]));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/pop/S15.4.4.6_A3_T2.js b/js/src/tests/test262/built-ins/Array/prototype/pop/S15.4.4.6_A3_T2.js
new file mode 100644
index 0000000000..b6de632743
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/pop/S15.4.4.6_A3_T2.js
@@ -0,0 +1,33 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: Check ToLength(length) for non Array objects
+esid: sec-array.prototype.pop
+description: length = 4294967297
+---*/
+
+var obj = {};
+obj.pop = Array.prototype.pop;
+obj[0] = "x";
+obj[4294967296] = "y";
+obj.length = 4294967297;
+
+var pop = obj.pop();
+if (pop !== "y") {
+  throw new Test262Error('#1: var obj = {}; obj.pop = Array.prototype.pop; obj[0] = "x"; obj[4294967296] = "y"; obj.length = 4294967297; obj.pop() === "y". Actual: ' + (pop));
+}
+
+if (obj.length !== 4294967296) {
+  throw new Test262Error('#2: var obj = {}; obj.pop = Array.prototype.pop; obj[0] = "x"; obj[4294967296] = "y"; obj.length = 4294967297; obj.pop(); obj.length === 4294967296. Actual: ' + (obj.length));
+}
+
+if (obj[0] !== "x") {
+  throw new Test262Error('#3: var obj = {}; obj.pop = Array.prototype.pop; obj[0] = "x"; obj[4294967296] = "y"; obj.length = 4294967297; obj.pop(); obj[0] === "x". Actual: ' + (obj[0]));
+}
+
+if (obj[4294967296] !== undefined) {
+  throw new Test262Error('#4: var obj = {}; obj.pop = Array.prototype.pop; obj[0] = "x"; obj[4294967296] = "y"; obj.length = 4294967297; obj.pop(); obj[4294967296] === undefined. Actual: ' + (obj[4294967296]));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/pop/S15.4.4.6_A3_T3.js b/js/src/tests/test262/built-ins/Array/prototype/pop/S15.4.4.6_A3_T3.js
new file mode 100644
index 0000000000..7086832284
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/pop/S15.4.4.6_A3_T3.js
@@ -0,0 +1,28 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: Check ToLength(length) for non Array objects
+esid: sec-array.prototype.pop
+description: length = -1
+---*/
+
+var obj = {};
+obj.pop = Array.prototype.pop;
+obj[4294967294] = "x";
+obj.length = -1;
+
+var pop = obj.pop();
+if (pop !== undefined) {
+  throw new Test262Error('#1: var obj = {}; obj.pop = Array.prototype.pop; obj[4294967294] = "x"; obj.length = -1; obj.pop() === undefined. Actual: ' + (pop));
+}
+
+if (obj.length !== 0) {
+  throw new Test262Error('#2: var obj = {}; obj.pop = Array.prototype.pop; obj[4294967294] = "x"; obj.length = -1; obj.pop(); obj.length === 0. Actual: ' + (obj.length));
+}
+
+if (obj[4294967294] !== "x") {
+  throw new Test262Error('#3: var obj = {}; obj.pop = Array.prototype.pop; obj[4294967294] = "x"; obj.length = -1; obj.pop(); obj[4294967294] === "x". Actual: ' + (obj[4294967294]));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/pop/S15.4.4.6_A4_T1.js b/js/src/tests/test262/built-ins/Array/prototype/pop/S15.4.4.6_A4_T1.js
new file mode 100644
index 0000000000..454bd58b98
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/pop/S15.4.4.6_A4_T1.js
@@ -0,0 +1,50 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: "[[Get]], [[Delete]] from not an inherited property"
+esid: sec-array.prototype.pop
+description: >
+    [[Prototype]] of Array instance is Array.prototype, [[Prototype]
+    of Array.prototype is Object.prototype
+---*/
+
+Array.prototype[1] = 1;
+var x = [0];
+x.length = 2;
+
+var pop = x.pop();
+if (pop !== 1) {
+  throw new Test262Error('#1: Array.prototype[1] = 1; x = [0]; x.length = 2; x.pop() === 1. Actual: ' + (pop));
+}
+
+if (x[1] !== 1) {
+  throw new Test262Error('#2: Array.prototype[1] = 1; x = [0]; x.length = 2; x.pop(); x[1] === 1. Actual: ' + (x[1]));
+}
+
+Object.prototype[1] = 1;
+Object.prototype.length = 2;
+Object.prototype.pop = Array.prototype.pop;
+x = {
+  0: 0
+};
+
+var pop = x.pop();
+if (pop !== 1) {
+  throw new Test262Error('#3: Object.prototype[1] = 1; Object.prototype.length = 2; Object.prototype.pop = Array.prototype.pop; x = {0:0}; x.pop() === 1. Actual: ' + (pop));
+}
+
+if (x[1] !== 1) {
+  throw new Test262Error('#4: Object.prototype[1] = 1; Object.prototype.length = 2; Object.prototype.pop = Array.prototype.pop; x = {0:0}; x.pop(); x[1] === 1. Actual: ' + (x[1]));
+}
+
+if (x.length !== 1) {
+  throw new Test262Error('#6: Object.prototype[1] = 1; Object.prototype.length = 2; Object.prototype.pop = Array.prototype.pop; x = {0:0}; x.pop(); x.length === 1. Actual: ' + (x.length));
+}
+
+delete x.length;
+if (x.length !== 2) {
+  throw new Test262Error('#7: Object.prototype[1] = 1; Object.prototype.length = 2; Object.prototype.pop = Array.prototype.pop; x = {0:0}; x.pop(); delete x; x.length === 2. Actual: ' + (x.length));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/pop/S15.4.4.6_A4_T2.js b/js/src/tests/test262/built-ins/Array/prototype/pop/S15.4.4.6_A4_T2.js
new file mode 100644
index 0000000000..51ed4692cf
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/pop/S15.4.4.6_A4_T2.js
@@ -0,0 +1,51 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: "[[Get]], [[Delete]] from not an inherited property"
+esid: sec-array.prototype.pop
+description: >
+    [[Prototype]] of Array instance is Array.prototype, [[Prototype]
+    of Array.prototype is Object.prototype
+---*/
+
+Array.prototype[1] = -1;
+var x = [0, 1];
+x.length = 2;
+
+var pop = x.pop();
+if (pop !== 1) {
+  throw new Test262Error('#1: Array.prototype[1] = -1; x = [0,1]; x.length = 2; x.pop() === 1. Actual: ' + (pop));
+}
+
+if (x[1] !== -1) {
+  throw new Test262Error('#2: Array.prototype[1] = -1; x = [0,1]; x.length = 2; x.pop(); x[1] === -1. Actual: ' + (x[1]));
+}
+
+Object.prototype[1] = -1;
+Object.prototype.length = 2;
+Object.prototype.pop = Array.prototype.pop;
+x = {
+  0: 0,
+  1: 1
+};
+
+var pop = x.pop();
+if (pop !== 1) {
+  throw new Test262Error('#3: Object.prototype[1] = -1; Object.prototype.length = 2; Object.prototype.pop = Array.prototype.pop; x = {0:0,1:1}; x.pop() === 1. Actual: ' + (pop));
+}
+
+if (x[1] !== -1) {
+  throw new Test262Error('#4: Object.prototype[1] = -1; Object.prototype.length = 2; Object.prototype.pop = Array.prototype.pop; x = {0:0,1:1}; x.pop(); x[1] === -1. Actual: ' + (x[1]));
+}
+
+if (x.length !== 1) {
+  throw new Test262Error('#6: Object.prototype[1] = -1; Object.prototype.length = 2; Object.prototype.pop = Array.prototype.pop; x = {0:0,1:1}; x.pop(); x.length === 1. Actual: ' + (x.length));
+}
+
+delete x.length;
+if (x.length !== 2) {
+  throw new Test262Error('#7: Object.prototype[1] = -1; Object.prototype.length = 2; Object.prototype.pop = Array.prototype.pop; x = {0:0,1:1}; x.pop(); delete x; x.length === 2. Actual: ' + (x.length));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/pop/browser.js b/js/src/tests/test262/built-ins/Array/prototype/pop/browser.js
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/js/src/tests/test262/built-ins/Array/prototype/pop/call-with-boolean.js b/js/src/tests/test262/built-ins/Array/prototype/pop/call-with-boolean.js
new file mode 100644
index 0000000000..024b63e892
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/pop/call-with-boolean.js
@@ -0,0 +1,12 @@
+// Copyright (c) 2020 Rick Waldron.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.pop
+description: Array.prototype.pop applied to boolean primitive
+---*/
+
+assert.sameValue(Array.prototype.pop.call(true), undefined, 'Array.prototype.pop.call(true) must return undefined');
+assert.sameValue(Array.prototype.pop.call(false), undefined, 'Array.prototype.pop.call(false) must return undefined');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/pop/clamps-to-integer-limit.js b/js/src/tests/test262/built-ins/Array/prototype/pop/clamps-to-integer-limit.js
new file mode 100644
index 0000000000..4f0b10b147
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/pop/clamps-to-integer-limit.js
@@ -0,0 +1,38 @@
+// Copyright (C) 2017 André Bargull. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.pop
+description: >
+  Length values exceeding 2^53-1 are clamped to 2^53-1.
+info: |
+  1. ...
+  2. Let len be ? ToLength(? Get(O, "length")).
+  ...
+  4. Else len > 0,
+  a. Let newLen be len-1.
+  ...
+  e. Perform ? Set(O, "length", newLen, true).
+  ...
+features: [exponentiation]
+---*/
+
+var arrayLike = {};
+
+arrayLike.length = 2 ** 53 - 1;
+Array.prototype.pop.call(arrayLike);
+assert.sameValue(arrayLike.length, 2 ** 53 - 2, "Length is 2**53 - 1");
+
+arrayLike.length = 2 ** 53;
+Array.prototype.pop.call(arrayLike);
+assert.sameValue(arrayLike.length, 2 ** 53 - 2, "Length is 2**53");
+
+arrayLike.length = 2 ** 53 + 2;
+Array.prototype.pop.call(arrayLike);
+assert.sameValue(arrayLike.length, 2 ** 53 - 2, "Length is 2**53 + 2");
+
+arrayLike.length = Infinity;
+Array.prototype.pop.call(arrayLike);
+assert.sameValue(arrayLike.length, 2 ** 53 - 2, "Length is Infinity");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/pop/length-near-integer-limit.js b/js/src/tests/test262/built-ins/Array/prototype/pop/length-near-integer-limit.js
new file mode 100644
index 0000000000..65cb4b0132
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/pop/length-near-integer-limit.js
@@ -0,0 +1,46 @@
+// Copyright (C) 2017 André Bargull. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.pop
+description: >
+  A value is removed from an array-like object whose length property is near the integer limit.
+info: |
+  ...
+  2. Let len be ? ToLength(? Get(O, "length")).
+  ...
+  4. Else len > 0,
+    a. Let newLen be len-1.
+    b. Let index be ! ToString(newLen).
+    c. Let element be ? Get(O, index).
+    d. Perform ? DeletePropertyOrThrow(O, index).
+    e. Perform ? Set(O, "length", newLen, true).
+    f. Return element.
+features: [exponentiation]
+---*/
+
+var arrayLike = {
+  "9007199254740989": "9007199254740989",
+  "9007199254740990": "9007199254740990",
+  "9007199254740991": "9007199254740991",
+  length: 2 ** 53 - 1
+};
+
+var value = Array.prototype.pop.call(arrayLike);
+
+assert.sameValue(value, "9007199254740990",
+  "arrayLike['9007199254740990'] is returned from pop()");
+
+assert.sameValue(arrayLike.length, 2 ** 53 - 2,
+  "New arrayLike.length is 2**53 - 2");
+
+assert.sameValue(arrayLike["9007199254740989"], "9007199254740989",
+  "arrayLike['9007199254740989'] is unchanged");
+
+assert.sameValue("9007199254740990" in arrayLike, false,
+  "arrayLike['9007199254740990'] is removed");
+
+assert.sameValue(arrayLike["9007199254740991"], "9007199254740991",
+  "arrayLike['9007199254740991'] is unchanged");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/pop/length.js b/js/src/tests/test262/built-ins/Array/prototype/pop/length.js
new file mode 100644
index 0000000000..6285c752f0
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/pop/length.js
@@ -0,0 +1,30 @@
+// Copyright (C) 2017 Leo Balter. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.pop
+description: >
+  The "length" property of Array.prototype.pop
+info: |
+  17 ECMAScript Standard Built-in Objects
+
+  Every built-in function object, including constructors, has a length property
+  whose value is an integer. Unless otherwise specified, this value is equal to
+  the largest number of named arguments shown in the subclause headings for the
+  function description. Optional parameters (which are indicated with brackets:
+  [ ]) or rest parameters (which are shown using the form «...name») are not
+  included in the default argument count.
+
+  Unless otherwise specified, the length property of a built-in function object
+  has the attributes { [[Writable]]: false, [[Enumerable]]: false,
+    [[Configurable]]: true }.
+includes: [propertyHelper.js]
+---*/
+
+assert.sameValue(Array.prototype.pop.length, 0);
+
+verifyNotEnumerable(Array.prototype.pop, 'length');
+verifyNotWritable(Array.prototype.pop, 'length');
+verifyConfigurable(Array.prototype.pop, 'length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/pop/name.js b/js/src/tests/test262/built-ins/Array/prototype/pop/name.js
new file mode 100644
index 0000000000..891fb91858
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/pop/name.js
@@ -0,0 +1,28 @@
+// Copyright (C) 2015 André Bargull. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.pop
+description: >
+  Array.prototype.pop.name is "pop".
+info: |
+  Array.prototype.pop ( )
+
+  17 ECMAScript Standard Built-in Objects:
+    Every built-in Function object, including constructors, that is not
+    identified as an anonymous function has a name property whose value
+    is a String.
+
+    Unless otherwise specified, the name property of a built-in Function
+    object, if it exists, has the attributes { [[Writable]]: false,
+    [[Enumerable]]: false, [[Configurable]]: true }.
+includes: [propertyHelper.js]
+---*/
+
+assert.sameValue(Array.prototype.pop.name, "pop");
+
+verifyNotEnumerable(Array.prototype.pop, "name");
+verifyNotWritable(Array.prototype.pop, "name");
+verifyConfigurable(Array.prototype.pop, "name");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/pop/not-a-constructor.js b/js/src/tests/test262/built-ins/Array/prototype/pop/not-a-constructor.js
new file mode 100644
index 0000000000..849c2b3305
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/pop/not-a-constructor.js
@@ -0,0 +1,31 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Array.prototype.pop does not implement [[Construct]], is not new-able
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+
+  sec-evaluatenew
+
+  ...
+  7. If IsConstructor(constructor) is false, throw a TypeError exception.
+  ...
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(isConstructor(Array.prototype.pop), false, 'isConstructor(Array.prototype.pop) must return false');
+
+assert.throws(TypeError, () => {
+  new Array.prototype.pop();
+}, '`new Array.prototype.pop()` throws TypeError');
+
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/pop/prop-desc.js b/js/src/tests/test262/built-ins/Array/prototype/pop/prop-desc.js
new file mode 100644
index 0000000000..c39724bd1d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/pop/prop-desc.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2017 Leo Balter. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.pop
+description: >
+  "pop" property of Array.prototype
+info: |
+  17 ECMAScript Standard Built-in Objects
+  
+  Every other data property described in clauses 18 through 26 and in Annex B.2
+  has the attributes { [[Writable]]: true, [[Enumerable]]: false,
+    [[Configurable]]: true } unless otherwise specified.
+includes: [propertyHelper.js]
+---*/
+
+assert.sameValue(typeof Array.prototype.pop, 'function', 'typeof');
+
+verifyNotEnumerable(Array.prototype, "pop");
+verifyWritable(Array.prototype, "pop");
+verifyConfigurable(Array.prototype, "pop");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/pop/set-length-array-is-frozen.js b/js/src/tests/test262/built-ins/Array/prototype/pop/set-length-array-is-frozen.js
new file mode 100644
index 0000000000..d083e0eb19
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/pop/set-length-array-is-frozen.js
@@ -0,0 +1,49 @@
+// Copyright (C) 2022 Apple Inc. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.pop
+description: >
+  A TypeError is thrown when "length" is [[Set]] on a frozen array.
+info: |
+  Array.prototype.pop ( )
+
+  [...]
+  4. Else,
+    a. Assert: len > 0.
+    b. Let newLen be 𝔽(len - 1).
+    c. Let index be ! ToString(newLen).
+    d. Let element be ? Get(O, index).
+    e. Perform ? DeletePropertyOrThrow(O, index).
+    f. Perform ? Set(O, "length", newLen, true).
+
+  OrdinarySetWithOwnDescriptor ( O, P, V, Receiver, ownDesc )
+
+  [...]
+  2. If IsDataDescriptor(ownDesc) is true, then
+    a. If ownDesc.[[Writable]] is false, return false.
+
+  Set ( O, P, V, Throw )
+
+  [...]
+  1. Let success be ? O.[[Set]](P, V, O).
+  2. If success is false and Throw is true, throw a TypeError exception.
+---*/
+
+var array = new Array(1);
+var arrayPrototypeGet0Calls = 0;
+
+Object.defineProperty(Array.prototype, "0", {
+  get() {
+    Object.freeze(array);
+    arrayPrototypeGet0Calls++;
+  },
+});
+
+assert.throws(TypeError, function() {
+  array.pop();
+});
+
+assert.sameValue(array.length, 1);
+assert.sameValue(arrayPrototypeGet0Calls, 1);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/pop/set-length-array-length-is-non-writable.js b/js/src/tests/test262/built-ins/Array/prototype/pop/set-length-array-length-is-non-writable.js
new file mode 100644
index 0000000000..b53a73d867
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/pop/set-length-array-length-is-non-writable.js
@@ -0,0 +1,49 @@
+// Copyright (C) 2022 Apple Inc. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.pop
+description: >
+  A TypeError is thrown when "length" is [[Set]] on an array with non-writable "length".
+info: |
+  Array.prototype.pop ( )
+
+  [...]
+  4. Else,
+    a. Assert: len > 0.
+    b. Let newLen be 𝔽(len - 1).
+    c. Let index be ! ToString(newLen).
+    d. Let element be ? Get(O, index).
+    e. Perform ? DeletePropertyOrThrow(O, index).
+    f. Perform ? Set(O, "length", newLen, true).
+
+  OrdinarySetWithOwnDescriptor ( O, P, V, Receiver, ownDesc )
+
+  [...]
+  2. If IsDataDescriptor(ownDesc) is true, then
+    a. If ownDesc.[[Writable]] is false, return false.
+
+  Set ( O, P, V, Throw )
+
+  [...]
+  1. Let success be ? O.[[Set]](P, V, O).
+  2. If success is false and Throw is true, throw a TypeError exception.
+---*/
+
+var array = new Array(1);
+var arrayPrototypeGet0Calls = 0;
+
+Object.defineProperty(Array.prototype, "0", {
+  get() {
+    Object.defineProperty(array, "length", { writable: false });
+    arrayPrototypeGet0Calls++;
+  },
+});
+
+assert.throws(TypeError, function() {
+  array.pop();
+});
+
+assert.sameValue(array.length, 1);
+assert.sameValue(arrayPrototypeGet0Calls, 1);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/pop/set-length-zero-array-is-frozen.js b/js/src/tests/test262/built-ins/Array/prototype/pop/set-length-zero-array-is-frozen.js
new file mode 100644
index 0000000000..a4fc043959
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/pop/set-length-zero-array-is-frozen.js
@@ -0,0 +1,34 @@
+// Copyright (C) 2022 Apple Inc. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.pop
+description: >
+  A TypeError is thrown when "length" is [[Set]] on an empty frozen array.
+info: |
+  Array.prototype.pop ( )
+
+  [...]
+  3. If len = 0, then
+    a. Perform ? Set(O, "length", +0𝔽, true).
+
+  OrdinarySetWithOwnDescriptor ( O, P, V, Receiver, ownDesc )
+
+  [...]
+  2. If IsDataDescriptor(ownDesc) is true, then
+    a. If ownDesc.[[Writable]] is false, return false.
+
+  Set ( O, P, V, Throw )
+
+  [...]
+  1. Let success be ? O.[[Set]](P, V, O).
+  2. If success is false and Throw is true, throw a TypeError exception.
+---*/
+
+var array = [];
+Object.freeze(array);
+
+assert.throws(TypeError, function() {
+  array.pop();
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/pop/set-length-zero-array-length-is-non-writable.js b/js/src/tests/test262/built-ins/Array/prototype/pop/set-length-zero-array-length-is-non-writable.js
new file mode 100644
index 0000000000..36664bc495
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/pop/set-length-zero-array-length-is-non-writable.js
@@ -0,0 +1,34 @@
+// Copyright (C) 2022 Apple Inc. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.pop
+description: >
+  A TypeError is thrown when "length" is [[Set]] on an empty array with non-writable "length".
+info: |
+  Array.prototype.pop ( )
+
+  [...]
+  3. If len = 0, then
+    a. Perform ? Set(O, "length", +0𝔽, true).
+
+  OrdinarySetWithOwnDescriptor ( O, P, V, Receiver, ownDesc )
+
+  [...]
+  2. If IsDataDescriptor(ownDesc) is true, then
+    a. If ownDesc.[[Writable]] is false, return false.
+
+  Set ( O, P, V, Throw )
+
+  [...]
+  1. Let success be ? O.[[Set]](P, V, O).
+  2. If success is false and Throw is true, throw a TypeError exception.
+---*/
+
+var array = [];
+Object.defineProperty(array, "length", { writable: false });
+
+assert.throws(TypeError, function() {
+  array.pop();
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/pop/shell.js b/js/src/tests/test262/built-ins/Array/prototype/pop/shell.js
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/js/src/tests/test262/built-ins/Array/prototype/pop/throws-with-string-receiver.js b/js/src/tests/test262/built-ins/Array/prototype/pop/throws-with-string-receiver.js
new file mode 100644
index 0000000000..4c2bfa1bff
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/pop/throws-with-string-receiver.js
@@ -0,0 +1,31 @@
+// Copyright (C) 2020 Sony Interactive Entertainment Inc. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.pop
+description: >
+  Array#pop throws TypeError upon attempting to modify a string
+info: |
+  Array.prototype.pop ( )
+  ...
+  3. If len is zero, then
+    a. Perform ? Set(O, "length", 0, true).
+    ...
+  4. Else,
+    ...
+    f. Perform ? Set(O, "length", newLen, true).
+
+  Set ( O, P, V, Throw )
+  ...
+  4. Let success be ? O.[[Set]](P, V, O).
+  5. If success is false and Throw is true, throw a TypeError exception.
+---*/
+
+assert.throws(TypeError, () => {
+  Array.prototype.pop.call('');
+}, "Array.prototype.pop.call('')");
+
+assert.throws(TypeError, () => {
+  Array.prototype.pop.call('abc');
+}, "Array.prototype.pop.call('abc')");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/prop-desc.js b/js/src/tests/test262/built-ins/Array/prototype/prop-desc.js
new file mode 100644
index 0000000000..5b3084aec5
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/prop-desc.js
@@ -0,0 +1,22 @@
+// Copyright (C) 2017 Leo Balter. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype
+description: >
+  The property descriptor of Array.prototype
+info: |
+  22.1.2.4 Array.prototype
+
+  The value of Array.prototype is %ArrayPrototype%, the intrinsic Array prototype object.
+
+  This property has the attributes { [[Writable]]: false, [[Enumerable]]: false,
+    [[Configurable]]: false }.
+includes: [propertyHelper.js]
+---*/
+
+verifyNotEnumerable(Array, 'prototype');
+verifyNotWritable(Array, 'prototype');
+verifyNotConfigurable(Array, 'prototype');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/proto.js b/js/src/tests/test262/built-ins/Array/prototype/proto.js
new file mode 100644
index 0000000000..9d65c83869
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/proto.js
@@ -0,0 +1,17 @@
+// Copyright (C) 2017 Leo Balter. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-properties-of-the-array-prototype-object
+description: >
+  The [[Prototype]] of Array.prototype is Object.Prototype.
+info: |
+  22.1.3 Properties of the Array Prototype Object
+
+  The value of the [[Prototype]] internal slot of the Array prototype object is
+  the intrinsic object %ObjectPrototype%.
+---*/
+
+assert.sameValue(Object.getPrototypeOf(Array.prototype), Object.prototype);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/push/S15.4.4.7_A1_T1.js b/js/src/tests/test262/built-ins/Array/prototype/push/S15.4.4.7_A1_T1.js
new file mode 100644
index 0000000000..e8b82b1e15
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/push/S15.4.4.7_A1_T1.js
@@ -0,0 +1,45 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    The arguments are appended to the end of the array, in
+    the order in which they appear. The new length of the array is returned
+    as the result of the call
+esid: sec-array.prototype.push
+description: Checking case when push is given no arguments or one argument
+---*/
+
+var x = new Array();
+var push = x.push(1);
+if (push !== 1) {
+  throw new Test262Error('#1: x = new Array(); x.push(1) === 1. Actual: ' + (push));
+}
+
+if (x[0] !== 1) {
+  throw new Test262Error('#2: x = new Array(); x.push(1); x[0] === 1. Actual: ' + (x[0]));
+}
+
+var push = x.push();
+if (push !== 1) {
+  throw new Test262Error('#3: x = new Array(); x.push(1); x.push() === 1. Actual: ' + (push));
+}
+
+if (x[1] !== undefined) {
+  throw new Test262Error('#4: x = new Array(); x.push(1); x.push(); x[1] === unedfined. Actual: ' + (x[1]));
+}
+
+var push = x.push(-1);
+if (push !== 2) {
+  throw new Test262Error('#5: x = new Array(); x.push(1); x.push(); x.push(-1) === 2. Actual: ' + (push));
+}
+
+if (x[1] !== -1) {
+  throw new Test262Error('#6: x = new Array(); x.push(1); x.push(-1); x[1] === -1. Actual: ' + (x[1]));
+}
+
+if (x.length !== 2) {
+  throw new Test262Error('#7: x = new Array(); x.push(1); x.push(); x.push(-1); x.length === 2. Actual: ' + (x.length));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/push/S15.4.4.7_A1_T2.js b/js/src/tests/test262/built-ins/Array/prototype/push/S15.4.4.7_A1_T2.js
new file mode 100644
index 0000000000..602b34e1b8
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/push/S15.4.4.7_A1_T2.js
@@ -0,0 +1,52 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    The arguments are appended to the end of the array, in
+    the order in which they appear. The new length of the array is returned
+    as the result of the call
+esid: sec-array.prototype.push
+description: Checking case when push is given many arguments
+---*/
+
+var x = [];
+if (x.length !== 0) {
+  throw new Test262Error('#1: x = []; x.length === 0. Actual: ' + (x.length));
+}
+
+x[0] = 0;
+var push = x.push(true, Number.POSITIVE_INFINITY, "NaN", "1", -1);
+if (push !== 6) {
+  throw new Test262Error('#2: x = []; x[0] = 0; x.push(true, Number.POSITIVE_INFINITY, "NaN", "1", -1) === 6. Actual: ' + (push));
+}
+
+if (x[0] !== 0) {
+  throw new Test262Error('#3: x = []; x[0] = 0; x.push(true, Number.POSITIVE_INFINITY, "NaN", "1", -1); x[0] === 0. Actual: ' + (x[0]));
+}
+
+if (x[1] !== true) {
+  throw new Test262Error('#4: x = []; x[0] = 0; x.push(true, Number.POSITIVE_INFINITY, "NaN", "1", -1); x[1] === true. Actual: ' + (x[1]));
+}
+
+if (x[2] !== Number.POSITIVE_INFINITY) {
+  throw new Test262Error('#5: x = []; x[0] = 0; x.push(true, Number.POSITIVE_INFINITY, "NaN", "1", -1); x[2] === Number.POSITIVE_INFINITY. Actual: ' + (x[2]));
+}
+
+if (x[3] !== "NaN") {
+  throw new Test262Error('#6: x = []; x[0] = 0; x.push(true, Number.POSITIVE_INFINITY, "NaN", "1", -1); x[3] === "NaN". Actual: ' + (x[3]));
+}
+
+if (x[4] !== "1") {
+  throw new Test262Error('#7: x = []; x[0] = 0; x.push(true, Number.POSITIVE_INFINITY, "NaN", "1", -1); x[4] === "1". Actual: ' + (x[4]));
+}
+
+if (x[5] !== -1) {
+  throw new Test262Error('#8: x = []; x[0] = 0; x.push(true, Number.POSITIVE_INFINITY, "NaN", "1", -1); x[5] === -1. Actual: ' + (x[5]));
+}
+
+if (x.length !== 6) {
+  throw new Test262Error('#9: x = []; x[0] = 0; x.push(true, Number.POSITIVE_INFINITY, "NaN", "1", -1); x.length === 6. Actual: ' + (x.length));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/push/S15.4.4.7_A2_T1.js b/js/src/tests/test262/built-ins/Array/prototype/push/S15.4.4.7_A2_T1.js
new file mode 100644
index 0000000000..2e5e878a92
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/push/S15.4.4.7_A2_T1.js
@@ -0,0 +1,61 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    The push function is intentionally generic.
+    It does not require that its this value be an Array object
+esid: sec-array.prototype.push
+description: >
+    The arguments are appended to the end of the array, in  the order
+    in which they appear. The new length of the array is returned  as
+    the result of the call
+---*/
+
+var obj = {};
+obj.push = Array.prototype.push;
+
+if (obj.length !== undefined) {
+  throw new Test262Error('#0: var obj = {}; obj.length === undefined. Actual: ' + (obj.length));
+} else {
+  var push = obj.push(-1);
+  if (push !== 1) {
+    throw new Test262Error('#1: var obj = {}; obj.push = Array.prototype.push; obj.push(-1) === 1. Actual: ' + (push));
+  }
+  if (obj.length !== 1) {
+    throw new Test262Error('#2: var obj = {}; obj.push = Array.prototype.push; obj.push(-1); obj.length === 1. Actual: ' + (obj.length));
+  }
+  if (obj["0"] !== -1) {
+    throw new Test262Error('#3: var obj = {}; obj.push = Array.prototype.push; obj.push(-1); obj["0"] === -1. Actual: ' + (obj["0"]));
+  }
+}
+
+obj.length = undefined;
+var push = obj.push(-4);
+if (push !== 1) {
+  throw new Test262Error('#4: var obj = {}; obj.length = undefined; obj.push = Array.prototype.push; obj.push(-4) === 1. Actual: ' + (push));
+}
+
+if (obj.length !== 1) {
+  throw new Test262Error('#5: var obj = {}; obj.length = undefined; obj.push = Array.prototype.push; obj.push(-4); obj.length === 1. Actual: ' + (obj.length));
+}
+
+if (obj["0"] !== -4) {
+  throw new Test262Error('#6: var obj = {}; obj.length = undefined; obj.push = Array.prototype.push; obj.push(-4); obj["0"] === -4. Actual: ' + (obj["0"]));
+}
+
+obj.length = null
+var push = obj.push(-7);
+if (push !== 1) {
+  throw new Test262Error('#7: var obj = {}; obj.length = null; obj.push = Array.prototype.push; obj.push(-7) === 1. Actual: ' + (push));
+}
+
+if (obj.length !== 1) {
+  throw new Test262Error('#8: var obj = {}; obj.length = null; obj.push = Array.prototype.push; obj.push(-7); obj.length === 1. Actual: ' + (obj.length));
+}
+
+if (obj["0"] !== -7) {
+  throw new Test262Error('#9: var obj = {}; obj.length = null; obj.push = Array.prototype.push; obj.push(-7); obj["0"] === -7. Actual: ' + (obj["0"]));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/push/S15.4.4.7_A2_T2.js b/js/src/tests/test262/built-ins/Array/prototype/push/S15.4.4.7_A2_T2.js
new file mode 100644
index 0000000000..2e35207c02
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/push/S15.4.4.7_A2_T2.js
@@ -0,0 +1,101 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    The push function is intentionally generic.
+    It does not require that its this value be an Array object
+esid: sec-array.prototype.push
+description: >
+    The arguments are appended to the end of the array, in  the order
+    in which they appear. The new length of the array is returned  as
+    the result of the call
+---*/
+
+var obj = {};
+obj.push = Array.prototype.push;
+
+obj.length = NaN;
+var push = obj.push(-1);
+if (push !== 1) {
+  throw new Test262Error('#1: var obj = {}; obj.length = NaN; obj.push = Array.prototype.push; obj.push(-1) === 1. Actual: ' + (push));
+}
+
+if (obj.length !== 1) {
+  throw new Test262Error('#2: var obj = {}; obj.length = NaN; obj.push = Array.prototype.push; obj.push(-1); obj.length === 1. Actual: ' + (obj.length));
+}
+
+if (obj["0"] !== -1) {
+  throw new Test262Error('#3: var obj = {}; obj.length = NaN; obj.push = Array.prototype.push; obj.push(-1); obj["0"] === -1. Actual: ' + (obj["0"]));
+}
+
+obj.length = Number.POSITIVE_INFINITY;
+assert.throws(TypeError, function() {
+  obj.push(-4);
+});
+
+if (obj.length !== Number.POSITIVE_INFINITY) {
+  throw new Test262Error('#6: var obj = {}; obj.length = Number.POSITIVE_INFINITY; obj.push = Array.prototype.push; obj.push(-4); obj.length === Number.POSITIVE_INFINITY. Actual: ' + (obj.length));
+}
+
+if (obj[9007199254740991] !== undefined) {
+  throw new Test262Error('#6: var obj = {}; obj.length = Number.POSITIVE_INFINITY; obj.push = Array.prototype.push; obj.push(-4); obj[9007199254740991] === undefined. Actual: ' + (obj["9007199254740991"]));
+}
+
+obj.length = Number.NEGATIVE_INFINITY;
+var push = obj.push(-7);
+if (push !== 1) {
+  throw new Test262Error('#7: var obj = {}; obj.length = Number.NEGATIVE_INFINITY; obj.push = Array.prototype.push; obj.push(-7) === 1. Actual: ' + (push));
+}
+
+if (obj.length !== 1) {
+  throw new Test262Error('#8: var obj = {}; obj.length = Number.NEGATIVE_INFINITY; obj.push = Array.prototype.push; obj.push(-7); obj.length === 1. Actual: ' + (obj.length));
+}
+
+if (obj["0"] !== -7) {
+  throw new Test262Error('#9: var obj = {}; obj.length = Number.NEGATIVE_INFINITY; obj.push = Array.prototype.push; obj.push(-7); obj["0"] === -7. Actual: ' + (obj["0"]));
+}
+
+obj.length = 0.5;
+var push = obj.push(-10);
+if (push !== 1) {
+  throw new Test262Error('#10: var obj = {}; obj.length = 0.5; obj.push = Array.prototype.push; obj.push(-10) === 1. Actual: ' + (push));
+}
+
+if (obj.length !== 1) {
+  throw new Test262Error('#11: var obj = {}; obj.length = 0.5; obj.push = Array.prototype.push; obj.push(-10); obj.length === 1. Actual: ' + (obj.length));
+}
+
+if (obj["0"] !== -10) {
+  throw new Test262Error('#12: var obj = {}; obj.length = 0.5; obj.push = Array.prototype.push; obj.push(-10); obj["0"] === -10. Actual: ' + (obj["0"]));
+}
+
+obj.length = 1.5;
+var push = obj.push(-13);
+if (push !== 2) {
+  throw new Test262Error('#13: var obj = {}; obj.length = 1.5; obj.push = Array.prototype.push; obj.push(-13) === 2. Actual: ' + (push));
+}
+
+if (obj.length !== 2) {
+  throw new Test262Error('#14: var obj = {}; obj.length = 1.5; obj.push = Array.prototype.push; obj.push(-13); obj.length === 2. Actual: ' + (obj.length));
+}
+
+if (obj["1"] !== -13) {
+  throw new Test262Error('#15: var obj = {}; obj.length = 1.5; obj.push = Array.prototype.push; obj.push(-13); obj["1"] === -13. Actual: ' + (obj["1"]));
+}
+
+obj.length = new Number(0);
+var push = obj.push(-16);
+if (push !== 1) {
+  throw new Test262Error('#16: var obj = {}; obj.length = new Number(0); obj.push = Array.prototype.push; obj.push(-16) === 1. Actual: ' + (push));
+}
+
+if (obj.length !== 1) {
+  throw new Test262Error('#17: var obj = {}; obj.length = new Number(0); obj.push = Array.prototype.push; obj.push(-16); obj.length === 1. Actual: ' + (obj.length));
+}
+
+if (obj["0"] !== -16) {
+  throw new Test262Error('#18: var obj = {}; obj.length = new Number(0); obj.push = Array.prototype.push; obj.push(-16); obj["0"] === -16. Actual: ' + (obj["0"]));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/push/S15.4.4.7_A2_T3.js b/js/src/tests/test262/built-ins/Array/prototype/push/S15.4.4.7_A2_T3.js
new file mode 100644
index 0000000000..cec90447f0
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/push/S15.4.4.7_A2_T3.js
@@ -0,0 +1,120 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    The push function is intentionally generic.
+    It does not require that its this value be an Array object
+esid: sec-array.prototype.push
+description: >
+    Operator use ToNumber from length.  If Type(value) is Object,
+    evaluate ToPrimitive(value, Number)
+---*/
+
+var obj = {};
+obj.push = Array.prototype.push;
+
+obj.length = {
+  valueOf() {
+    return 3
+  }
+};
+var push = obj.push();
+assert.sameValue(push, 3, 'The value of push is expected to be 3');
+
+obj.length = {
+  valueOf() {
+    return 3
+  },
+  toString() {
+    return 1
+  }
+};
+var push = obj.push();
+assert.sameValue(push, 3, 'The value of push is expected to be 3');
+
+obj.length = {
+  valueOf() {
+    return 3
+  },
+  toString() {
+    return {}
+  }
+};
+var push = obj.push();
+assert.sameValue(push, 3, 'The value of push is expected to be 3');
+
+try {
+  obj.length = {
+    valueOf() {
+      return 3
+    },
+    toString() {
+      throw "error"
+    }
+  };
+  var push = obj.push();
+  assert.sameValue(push, 3, 'The value of push is expected to be 3');
+}
+catch (e) {
+  assert.notSameValue(e, "error", 'The value of e is not "error"');
+}
+
+obj.length = {
+  toString() {
+    return 1
+  }
+};
+var push = obj.push();
+assert.sameValue(push, 1, 'The value of push is expected to be 1');
+
+obj.length = {
+  valueOf() {
+    return {}
+  },
+  toString() {
+    return 1
+  }
+}
+var push = obj.push();
+assert.sameValue(push, 1, 'The value of push is expected to be 1');
+
+try {
+
+  obj.length = {
+    valueOf() {
+      throw "error"
+    },
+    toString() {
+      return 1
+    }
+  };
+  var push = obj.push();
+  throw new Test262Error('#7.1:  obj.length = {valueOf() {throw "error"}, toString() {return 1}}; obj.push() throw "error". Actual: ' + (push));
+}
+catch (e) {
+  assert.sameValue(e, "error", 'The value of e is expected to be "error"');
+}
+
+try {
+
+  obj.length = {
+    valueOf() {
+      return {}
+    },
+    toString() {
+      return {}
+    }
+  };
+  var push = obj.push();
+  throw new Test262Error('#8.1:  obj.length = {valueOf() {return {}}, toString() {return {}}}  obj.push() throw TypeError. Actual: ' + (push));
+}
+catch (e) {
+  assert.sameValue(
+    e instanceof TypeError,
+    true,
+    'The result of evaluating (e instanceof TypeError) is expected to be true'
+  );
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/push/S15.4.4.7_A3.js b/js/src/tests/test262/built-ins/Array/prototype/push/S15.4.4.7_A3.js
new file mode 100644
index 0000000000..cd918e0180
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/push/S15.4.4.7_A3.js
@@ -0,0 +1,30 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: Check ToLength(length) for Array object
+esid: sec-array.prototype.push
+description: If ToUint32(length) !== length, throw RangeError
+---*/
+
+var x = [];
+x.length = 4294967295;
+
+var push = x.push();
+assert.sameValue(push, 4294967295, 'The value of push is expected to be 4294967295');
+
+try {
+  x.push("x");
+  throw new Test262Error('#2.1: x = []; x.length = 4294967295; x.push("x") throw RangeError. Actual: ' + (push));
+} catch (e) {
+  assert.sameValue(
+    e instanceof RangeError,
+    true,
+    'The result of evaluating (e instanceof RangeError) is expected to be true'
+  );
+}
+
+assert.sameValue(x[4294967295], "x", 'The value of x[4294967295] is expected to be "x"');
+assert.sameValue(x.length, 4294967295, 'The value of x.length is expected to be 4294967295');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/push/S15.4.4.7_A4_T1.js b/js/src/tests/test262/built-ins/Array/prototype/push/S15.4.4.7_A4_T1.js
new file mode 100644
index 0000000000..4561b952fb
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/push/S15.4.4.7_A4_T1.js
@@ -0,0 +1,60 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: Check ToLength(length) for non Array objects
+esid: sec-array.prototype.push
+description: length = 4294967296
+---*/
+
+var obj = {};
+obj.push = Array.prototype.push;
+obj.length = 4294967296;
+
+var push = obj.push("x", "y", "z");
+if (push !== 4294967299) {
+  throw new Test262Error('#1: var obj = {}; obj.push = Array.prototype.push; obj.length = 4294967296; obj.push("x", "y", "z") === 4294967299. Actual: ' + (push));
+}
+
+if (obj.length !== 4294967299) {
+  throw new Test262Error('#2: var obj = {}; obj.push = Array.prototype.push; obj.length = 4294967296; obj.push("x", "y", "z"); obj.length === 4294967299. Actual: ' + (obj.length));
+}
+
+if (obj[0] !== undefined) {
+  throw new Test262Error('#3: var obj = {}; obj.push = Array.prototype.push; obj.length = 4294967296; obj.push("x", "y", "z"); obj[0] === undefined. Actual: ' + (obj[0]));
+}
+
+if (obj[1] !== undefined) {
+  throw new Test262Error('#4: var obj = {}; obj.push = Array.prototype.push; obj.length = 4294967296; obj.push("x", "y", "z"); obj[1] === undefined. Actual: ' + (obj[1]));
+}
+
+if (obj[2] !== undefined) {
+  throw new Test262Error('#5: var obj = {}; obj.push = Array.prototype.push; obj.length = 4294967296; obj.push("x", "y", "z"); obj[2] === undefined. Actual: ' + (obj[2]));
+}
+
+if (obj[4294967296] !== "x") {
+  throw new Test262Error('#6: var obj = {}; obj.push = Array.prototype.push; obj.length = 4294967296; obj.push("x", "y", "z"); obj[4294967296] === "x". Actual: ' + (obj[4294967296]));
+}
+
+if (obj[4294967297] !== "y") {
+  throw new Test262Error('#7: var obj = {}; obj.push = Array.prototype.push; obj.length = 4294967296; obj.push("x", "y", "z"); obj[4294967297] === "y". Actual: ' + (obj[4294967297]));
+}
+
+if (obj[4294967298] !== "z") {
+  throw new Test262Error('#8: var obj = {}; obj.push = Array.prototype.push; obj.length = 4294967296; obj.push("x", "y", "z"); obj[4294967298] === "z". Actual: ' + (obj[4294967298]));
+}
+
+var obj = {};
+obj.push = Array.prototype.push;
+obj.length = 4294967296;
+
+var push = obj.push();
+if (push !== 4294967296) {
+  throw new Test262Error('#9: var obj = {}; obj.push = Array.prototype.push; obj.length = 4294967296; obj.push() === 4294967296. Actual: ' + (push));
+}
+
+if (obj.length !== 4294967296) {
+  throw new Test262Error('#10: var obj = {}; obj.push = Array.prototype.push; obj.length = 4294967296; obj.push(); obj.length === 4294967296. Actual: ' + (obj.length));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/push/S15.4.4.7_A4_T2.js b/js/src/tests/test262/built-ins/Array/prototype/push/S15.4.4.7_A4_T2.js
new file mode 100644
index 0000000000..4beecec82a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/push/S15.4.4.7_A4_T2.js
@@ -0,0 +1,35 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: Check ToLength(length) for non Array objects
+esid: sec-array.prototype.push
+description: length = 4294967295
+---*/
+
+var obj = {};
+obj.push = Array.prototype.push;
+obj.length = 4294967295;
+
+var push = obj.push("x", "y", "z");
+if (push !== 4294967298) {
+  throw new Test262Error('#1: var obj = {}; obj.push = Array.prototype.push; obj.length = 4294967295; obj.push("x", "y", "z") === 4294967298. Actual: ' + (push));
+}
+
+if (obj.length !== 4294967298) {
+  throw new Test262Error('#2: var obj = {}; obj.push = Array.prototype.push; obj.length = 4294967295; obj.push("x", "y", "z"); obj.length === 4294967298. Actual: ' + (obj.length));
+}
+
+if (obj[4294967295] !== "x") {
+  throw new Test262Error('#3: var obj = {}; obj.push = Array.prototype.push; obj.length = 4294967295; obj.push("x", "y", "z"); obj[4294967295] === "x". Actual: ' + (obj[4294967295]));
+}
+
+if (obj[4294967296] !== "y") {
+  throw new Test262Error('#4: var obj = {}; obj.push = Array.prototype.push; obj.length = 4294967295; obj.push("x", "y", "z"); obj[4294967296] === "y". Actual: ' + (obj[4294967296]));
+}
+
+if (obj[4294967297] !== "z") {
+  throw new Test262Error('#5: var obj = {}; obj.push = Array.prototype.push; obj.length = 4294967295; obj.push("x", "y", "z"); obj[4294967297] === "z". Actual: ' + (obj[4294967297]));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/push/S15.4.4.7_A4_T3.js b/js/src/tests/test262/built-ins/Array/prototype/push/S15.4.4.7_A4_T3.js
new file mode 100644
index 0000000000..54fd4df676
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/push/S15.4.4.7_A4_T3.js
@@ -0,0 +1,47 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: Check ToLength(length) for non Array objects
+esid: sec-array.prototype.push
+description: length = -1
+---*/
+
+var obj = {};
+obj.push = Array.prototype.push;
+obj.length = -1;
+
+var push = obj.push("x", "y", "z");
+if (push !== 3) {
+  throw new Test262Error('#1: var obj = {}; obj.push = Array.prototype.push; obj.length = -1; obj.push("x", "y", "z") === 3. Actual: ' + (push));
+}
+
+if (obj.length !== 3) {
+  throw new Test262Error('#2: var obj = {}; obj.push = Array.prototype.push; obj.length = -1; obj.push("x", "y", "z"); obj.length === 3. Actual: ' + (obj.length));
+}
+
+if (obj[4294967295] !== undefined) {
+  throw new Test262Error('#3: var obj = {}; obj.push = Array.prototype.push; obj.length = -1; obj.push("x", "y", "z"); obj[4294967295] === undefined. Actual: ' + (obj[4294967295]));
+}
+
+if (obj[4294967296] !== undefined) {
+  throw new Test262Error('#4: var obj = {}; obj.push = Array.prototype.push; obj.length = -1; obj.push("x", "y", "z"); obj[4294967296] === undefined. Actual: ' + (obj[4294967296]));
+}
+
+if (obj[4294967297] !== undefined) {
+  throw new Test262Error('#5: var obj = {}; obj.push = Array.prototype.push; obj.length = -1; obj.push("x", "y", "z"); obj[4294967297] === undefined. Actual: ' + (obj[4294967297]));
+}
+
+if (obj[0] !== "x") {
+  throw new Test262Error('#3: var obj = {}; obj.push = Array.prototype.push; obj.length = -1; obj.push("x", "y", "z"); obj[0] === "x". Actual: ' + (obj[0]));
+}
+
+if (obj[1] !== "y") {
+  throw new Test262Error('#4: var obj = {}; obj.push = Array.prototype.push; obj.length = -1; obj.push("x", "y", "z"); obj[1] === "y". Actual: ' + (obj[1]));
+}
+
+if (obj[2] !== "z") {
+  throw new Test262Error('#5: var obj = {}; obj.push = Array.prototype.push; obj.length = -1; obj.push("x", "y", "z"); obj[2] === "z". Actual: ' + (obj[2]));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/push/S15.4.4.7_A5_T1.js b/js/src/tests/test262/built-ins/Array/prototype/push/S15.4.4.7_A5_T1.js
new file mode 100644
index 0000000000..d124babebf
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/push/S15.4.4.7_A5_T1.js
@@ -0,0 +1,42 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: "[[Get]] from not an inherited property"
+esid: sec-array.prototype.push
+description: >
+    [[Prototype]] of Array instance is Array.prototype, [[Prototype]
+    of Array.prototype is Object.prototype
+---*/
+
+Object.prototype[1] = -1;
+Object.prototype.length = 1;
+Object.prototype.push = Array.prototype.push;
+var x = {
+  0: 0
+};
+
+var push = x.push(1);
+if (push !== 2) {
+  throw new Test262Error('#1: Object.prototype[1] = 1; Object.prototype.length = -1; Object.prototype.push = Array.prototype.push; x = {0:0}; x.push(1) === 2. Actual: ' + (push));
+}
+
+if (x.length !== 2) {
+  throw new Test262Error('#2: Object.prototype[1] = 1; Object.prototype.length = -1; Object.prototype.push = Array.prototype.push; x = {0:0}; x.push(1); x.length === 2. Actual: ' + (x.length));
+}
+
+if (x[1] !== 1) {
+  throw new Test262Error('#3: Object.prototype[1] = 1; Object.prototype.length = -1; Object.prototype.push = Array.prototype.push; x = {0:0}; x.push(1); x[1] === 1. Actual: ' + (x[1]));
+}
+
+delete x[1];
+if (x[1] !== -1) {
+  throw new Test262Error('#4: Object.prototype[1] = 1; Object.prototype.length = -1; Object.prototype.push = Array.prototype.push; x = {0:0}; x.push(1); delete x[1]; x[1] === -1. Actual: ' + (x[1]));
+}
+
+delete x.length;
+if (x.length !== 1) {
+  throw new Test262Error('#5: Object.prototype[1] = 1; Object.prototype.length = -1; Object.prototype.push = Array.prototype.push; x = {0:0}; delete x; x.push(1); x.length === 1. Actual: ' + (x.length));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/push/browser.js b/js/src/tests/test262/built-ins/Array/prototype/push/browser.js
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/js/src/tests/test262/built-ins/Array/prototype/push/call-with-boolean.js b/js/src/tests/test262/built-ins/Array/prototype/push/call-with-boolean.js
new file mode 100644
index 0000000000..d6831e0a89
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/push/call-with-boolean.js
@@ -0,0 +1,12 @@
+// Copyright (c) 2020 Rick Waldron.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.push
+description: Array.prototype.push applied to boolean primitive
+---*/
+
+assert.sameValue(Array.prototype.push.call(true), 0, 'Array.prototype.push.call(true) must return 0');
+assert.sameValue(Array.prototype.push.call(false), 0, 'Array.prototype.push.call(false) must return 0');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/push/clamps-to-integer-limit.js b/js/src/tests/test262/built-ins/Array/prototype/push/clamps-to-integer-limit.js
new file mode 100644
index 0000000000..6466a0a5e0
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/push/clamps-to-integer-limit.js
@@ -0,0 +1,38 @@
+// Copyright (C) 2017 André Bargull. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.push
+description: >
+  Length values exceeding 2^53-1 are clamped to 2^53-1.
+info: |
+  1. ...
+  2. Let len be ? ToLength(? Get(O, "length")).
+  3. Let items be a List whose elements are, in left to right order, the arguments
+     that were passed to this function invocation.
+  4. Let argCount be the number of elements in items.
+  ...
+  7. Perform ? Set(O, "length", len, true).
+  ...
+features: [exponentiation]
+---*/
+
+var arrayLike = {};
+
+arrayLike.length = 2 ** 53 - 1;
+Array.prototype.push.call(arrayLike);
+assert.sameValue(arrayLike.length, 2 ** 53 - 1, "Length is 2**53 - 1");
+
+arrayLike.length = 2 ** 53;
+Array.prototype.push.call(arrayLike);
+assert.sameValue(arrayLike.length, 2 ** 53 - 1, "Length is 2**53");
+
+arrayLike.length = 2 ** 53 + 2;
+Array.prototype.push.call(arrayLike);
+assert.sameValue(arrayLike.length, 2 ** 53 - 1, "Length is 2**53 + 2");
+
+arrayLike.length = Infinity;
+Array.prototype.push.call(arrayLike);
+assert.sameValue(arrayLike.length, 2 ** 53 - 1, "Length is Infinity");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/push/length-near-integer-limit-set-failure.js b/js/src/tests/test262/built-ins/Array/prototype/push/length-near-integer-limit-set-failure.js
new file mode 100644
index 0000000000..8ecd9486cb
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/push/length-near-integer-limit-set-failure.js
@@ -0,0 +1,49 @@
+// Copyright (C) 2020 Alexey Shvayka. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.push
+description: >
+  A value is inserted in an array-like object whose length property is near the integer limit.
+  Unsuccessful [[Set]] raises a TypeError.
+info: |
+  Array.prototype.push ( ...items )
+
+  [...]
+  2. Let len be ? LengthOfArrayLike(O).
+  [...]
+  4. Let argCount be the number of elements in items.
+  [...]
+  6. Repeat, while items is not empty,
+    a. Remove the first element from items and let E be the value of the element.
+    b. Perform ? Set(O, ! ToString(len), E, true).
+    c. Set len to len + 1.
+  [...]
+
+  OrdinarySetWithOwnDescriptor ( O, P, V, Receiver, ownDesc )
+
+  [...]
+  3. If IsDataDescriptor(ownDesc) is true, then
+    a. If ownDesc.[[Writable]] is false, return false.
+---*/
+
+var arrayLike = {
+  length: Number.MAX_SAFE_INTEGER - 3,
+};
+
+Object.defineProperty(arrayLike, Number.MAX_SAFE_INTEGER - 1, {
+  value: 33,
+  writable: false,
+  enumerable: true,
+  configurable: true,
+});
+
+assert.throws(TypeError, function() {
+  Array.prototype.push.call(arrayLike, 1, 2, 3);
+});
+
+assert.sameValue(arrayLike[Number.MAX_SAFE_INTEGER - 3], 1);
+assert.sameValue(arrayLike[Number.MAX_SAFE_INTEGER - 2], 2);
+assert.sameValue(arrayLike[Number.MAX_SAFE_INTEGER - 1], 33);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/push/length-near-integer-limit.js b/js/src/tests/test262/built-ins/Array/prototype/push/length-near-integer-limit.js
new file mode 100644
index 0000000000..a947b29bad
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/push/length-near-integer-limit.js
@@ -0,0 +1,42 @@
+// Copyright (C) 2017 André Bargull. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.push
+description: >
+  A value is inserted in an array-like object whose length property is near the integer limit.
+info: |
+  ...
+  2. Let len be ? ToLength(? Get(O, "length")).
+  3. Let items be a List whose elements are, in left to right order, the
+     arguments that were passed to this function invocation.
+  ...
+  5. Repeat, while items is not empty
+    ...
+  7. Perform ? Set(O, "length", len, true).
+  ...
+features: [exponentiation]
+---*/
+
+var arrayLike = {
+  "9007199254740989": "9007199254740989",
+  /* "9007199254740990": empty */
+  "9007199254740991": "9007199254740991",
+  length: 2 ** 53 - 2
+};
+
+Array.prototype.push.call(arrayLike, "new-value");
+
+assert.sameValue(arrayLike.length, 2 ** 53 - 1,
+  "New arrayLike.length is 2**53 - 1");
+
+assert.sameValue(arrayLike["9007199254740989"], "9007199254740989",
+  "arrayLike['9007199254740989'] is unchanged");
+
+assert.sameValue(arrayLike["9007199254740990"], "new-value",
+  "arrayLike['9007199254740990'] has new value");
+
+assert.sameValue(arrayLike["9007199254740991"], "9007199254740991",
+  "arrayLike['9007199254740991'] is unchanged");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/push/length.js b/js/src/tests/test262/built-ins/Array/prototype/push/length.js
new file mode 100644
index 0000000000..d503ab3cfa
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/push/length.js
@@ -0,0 +1,34 @@
+// Copyright (C) 2017 Leo Balter. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.push
+description: >
+  The "length" property of Array.prototype.push
+info: |
+  22.1.3.18 Array.prototype.push ( ...items )
+
+  The length property of the push method is 1.
+
+  17 ECMAScript Standard Built-in Objects
+
+  Every built-in function object, including constructors, has a length property
+  whose value is an integer. Unless otherwise specified, this value is equal to
+  the largest number of named arguments shown in the subclause headings for the
+  function description. Optional parameters (which are indicated with brackets:
+  [ ]) or rest parameters (which are shown using the form «...name») are not
+  included in the default argument count.
+
+  Unless otherwise specified, the length property of a built-in function object
+  has the attributes { [[Writable]]: false, [[Enumerable]]: false,
+    [[Configurable]]: true }.
+includes: [propertyHelper.js]
+---*/
+
+assert.sameValue(Array.prototype.push.length, 1);
+
+verifyNotEnumerable(Array.prototype.push, 'length');
+verifyNotWritable(Array.prototype.push, 'length');
+verifyConfigurable(Array.prototype.push, 'length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/push/name.js b/js/src/tests/test262/built-ins/Array/prototype/push/name.js
new file mode 100644
index 0000000000..42e2e96314
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/push/name.js
@@ -0,0 +1,28 @@
+// Copyright (C) 2015 André Bargull. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.push
+description: >
+  Array.prototype.push.name is "push".
+info: |
+  Array.prototype.push ( ...items )
+
+  17 ECMAScript Standard Built-in Objects:
+    Every built-in Function object, including constructors, that is not
+    identified as an anonymous function has a name property whose value
+    is a String.
+
+    Unless otherwise specified, the name property of a built-in Function
+    object, if it exists, has the attributes { [[Writable]]: false,
+    [[Enumerable]]: false, [[Configurable]]: true }.
+includes: [propertyHelper.js]
+---*/
+
+assert.sameValue(Array.prototype.push.name, "push");
+
+verifyNotEnumerable(Array.prototype.push, "name");
+verifyNotWritable(Array.prototype.push, "name");
+verifyConfigurable(Array.prototype.push, "name");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/push/not-a-constructor.js b/js/src/tests/test262/built-ins/Array/prototype/push/not-a-constructor.js
new file mode 100644
index 0000000000..291b72867d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/push/not-a-constructor.js
@@ -0,0 +1,31 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Array.prototype.push does not implement [[Construct]], is not new-able
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+
+  sec-evaluatenew
+
+  ...
+  7. If IsConstructor(constructor) is false, throw a TypeError exception.
+  ...
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(isConstructor(Array.prototype.push), false, 'isConstructor(Array.prototype.push) must return false');
+
+assert.throws(TypeError, () => {
+  new Array.prototype.push();
+}, '`new Array.prototype.push()` throws TypeError');
+
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/push/prop-desc.js b/js/src/tests/test262/built-ins/Array/prototype/push/prop-desc.js
new file mode 100644
index 0000000000..4f739aa30a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/push/prop-desc.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2017 Leo Balter. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.push
+description: >
+  "push" property of Array.prototype
+info: |
+  17 ECMAScript Standard Built-in Objects
+  
+  Every other data property described in clauses 18 through 26 and in Annex B.2
+  has the attributes { [[Writable]]: true, [[Enumerable]]: false,
+    [[Configurable]]: true } unless otherwise specified.
+includes: [propertyHelper.js]
+---*/
+
+assert.sameValue(typeof Array.prototype.push, 'function', 'typeof');
+
+verifyNotEnumerable(Array.prototype, "push");
+verifyWritable(Array.prototype, "push");
+verifyConfigurable(Array.prototype, "push");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/push/set-length-array-is-frozen.js b/js/src/tests/test262/built-ins/Array/prototype/push/set-length-array-is-frozen.js
new file mode 100644
index 0000000000..09aa72f52f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/push/set-length-array-is-frozen.js
@@ -0,0 +1,47 @@
+// Copyright (C) 2022 Apple Inc. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.push
+description: >
+  A TypeError is thrown when "length" is [[Set]] on a frozen array.
+info: |
+  Array.prototype.push ( ...items )
+
+  [...]
+  5. For each element E of items, do
+    a. Perform ? Set(O, ! ToString(𝔽(len)), E, true).
+    b. Set len to len + 1.
+  6. Perform ? Set(O, "length", 𝔽(len), true).
+
+  OrdinarySetWithOwnDescriptor ( O, P, V, Receiver, ownDesc )
+
+  [...]
+  2. If IsDataDescriptor(ownDesc) is true, then
+    a. If ownDesc.[[Writable]] is false, return false.
+
+  Set ( O, P, V, Throw )
+
+  [...]
+  1. Let success be ? O.[[Set]](P, V, O).
+  2. If success is false and Throw is true, throw a TypeError exception.
+---*/
+
+var array = [];
+var arrayPrototypeSet0Calls = 0;
+
+Object.defineProperty(Array.prototype, "0", {
+  set(_val) {
+    Object.freeze(array);
+    arrayPrototypeSet0Calls++;
+  },
+});
+
+assert.throws(TypeError, function() {
+  array.push(1);
+});
+
+assert(!array.hasOwnProperty(0));
+assert.sameValue(array.length, 0);
+assert.sameValue(arrayPrototypeSet0Calls, 1);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/push/set-length-array-length-is-non-writable.js b/js/src/tests/test262/built-ins/Array/prototype/push/set-length-array-length-is-non-writable.js
new file mode 100644
index 0000000000..4e8ba1d821
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/push/set-length-array-length-is-non-writable.js
@@ -0,0 +1,47 @@
+// Copyright (C) 2022 Apple Inc. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.push
+description: >
+  A TypeError is thrown when "length" is [[Set]] on an array with non-writable "length".
+info: |
+  Array.prototype.push ( ...items )
+
+  [...]
+  5. For each element E of items, do
+    a. Perform ? Set(O, ! ToString(𝔽(len)), E, true).
+    b. Set len to len + 1.
+  6. Perform ? Set(O, "length", 𝔽(len), true).
+
+  OrdinarySetWithOwnDescriptor ( O, P, V, Receiver, ownDesc )
+
+  [...]
+  2. If IsDataDescriptor(ownDesc) is true, then
+    a. If ownDesc.[[Writable]] is false, return false.
+
+  Set ( O, P, V, Throw )
+
+  [...]
+  1. Let success be ? O.[[Set]](P, V, O).
+  2. If success is false and Throw is true, throw a TypeError exception.
+---*/
+
+var array = [];
+var arrayPrototypeSet0Calls = 0;
+
+Object.defineProperty(Array.prototype, "0", {
+  set(_val) {
+    Object.defineProperty(array, "length", { writable: false });
+    arrayPrototypeSet0Calls++;
+  },
+});
+
+assert.throws(TypeError, function() {
+  array.push(1);
+});
+
+assert(!array.hasOwnProperty(0));
+assert.sameValue(array.length, 0);
+assert.sameValue(arrayPrototypeSet0Calls, 1);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/push/set-length-zero-array-is-frozen.js b/js/src/tests/test262/built-ins/Array/prototype/push/set-length-zero-array-is-frozen.js
new file mode 100644
index 0000000000..a2bb89fa1f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/push/set-length-zero-array-is-frozen.js
@@ -0,0 +1,38 @@
+// Copyright (C) 2022 Apple Inc. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.push
+description: >
+  A TypeError is thrown when "length" is [[Set]] on an empty frozen array.
+info: |
+  Array.prototype.push ( ...items )
+
+  [...]
+  2. Let len be ? LengthOfArrayLike(O).
+  [...]
+  6. Perform ? Set(O, "length", 𝔽(len), true).
+
+  OrdinarySetWithOwnDescriptor ( O, P, V, Receiver, ownDesc )
+
+  [...]
+  2. If IsDataDescriptor(ownDesc) is true, then
+    a. If ownDesc.[[Writable]] is false, return false.
+
+  Set ( O, P, V, Throw )
+
+  [...]
+  1. Let success be ? O.[[Set]](P, V, O).
+  2. If success is false and Throw is true, throw a TypeError exception.
+---*/
+
+var array = [];
+Object.freeze(array);
+
+assert.throws(TypeError, function() {
+  array.push();
+});
+
+assert(!array.hasOwnProperty(0));
+assert.sameValue(array.length, 0);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/push/set-length-zero-array-length-is-non-writable.js b/js/src/tests/test262/built-ins/Array/prototype/push/set-length-zero-array-length-is-non-writable.js
new file mode 100644
index 0000000000..43527e8569
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/push/set-length-zero-array-length-is-non-writable.js
@@ -0,0 +1,38 @@
+// Copyright (C) 2022 Apple Inc. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.push
+description: >
+  A TypeError is thrown when "length" is [[Set]] on an empty array with non-writable "length".
+info: |
+  Array.prototype.push ( ...items )
+
+  [...]
+  2. Let len be ? LengthOfArrayLike(O).
+  [...]
+  6. Perform ? Set(O, "length", 𝔽(len), true).
+
+  OrdinarySetWithOwnDescriptor ( O, P, V, Receiver, ownDesc )
+
+  [...]
+  2. If IsDataDescriptor(ownDesc) is true, then
+    a. If ownDesc.[[Writable]] is false, return false.
+
+  Set ( O, P, V, Throw )
+
+  [...]
+  1. Let success be ? O.[[Set]](P, V, O).
+  2. If success is false and Throw is true, throw a TypeError exception.
+---*/
+
+var array = [];
+Object.defineProperty(array, "length", { writable: false });
+
+assert.throws(TypeError, function() {
+  array.push();
+});
+
+assert(!array.hasOwnProperty(0));
+assert.sameValue(array.length, 0);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/push/shell.js b/js/src/tests/test262/built-ins/Array/prototype/push/shell.js
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/js/src/tests/test262/built-ins/Array/prototype/push/throws-if-integer-limit-exceeded.js b/js/src/tests/test262/built-ins/Array/prototype/push/throws-if-integer-limit-exceeded.js
new file mode 100644
index 0000000000..f2dbabc549
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/push/throws-if-integer-limit-exceeded.js
@@ -0,0 +1,41 @@
+// Copyright (C) 2017 André Bargull. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.push
+description: >
+  A TypeError is thrown if the new length exceeds 2^53-1.
+info: |
+  1. ...
+  2. Let len be ? ToLength(? Get(O, "length")).
+  3. Let items be a List whose elements are, in left to right order, the arguments
+     that were passed to this function invocation.
+  4. Let argCount be the number of elements in items.
+  5. If len + argCount > 2^53-1, throw a TypeError exception.
+  ...
+features: [exponentiation]
+---*/
+
+var arrayLike = {};
+
+arrayLike.length = 2 ** 53 - 1;
+assert.throws(TypeError, function() {
+  Array.prototype.push.call(arrayLike, null);
+}, "Length is 2**53 - 1");
+
+arrayLike.length = 2 ** 53;
+assert.throws(TypeError, function() {
+  Array.prototype.push.call(arrayLike, null);
+}, "Length is 2**53");
+
+arrayLike.length = 2 ** 53 + 2;
+assert.throws(TypeError, function() {
+  Array.prototype.push.call(arrayLike, null);
+}, "Length is 2**53 + 2");
+
+arrayLike.length = Infinity;
+assert.throws(TypeError, function() {
+  Array.prototype.push.call(arrayLike, null);
+}, "Length is Infinity");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/push/throws-with-string-receiver.js b/js/src/tests/test262/built-ins/Array/prototype/push/throws-with-string-receiver.js
new file mode 100644
index 0000000000..23805127a6
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/push/throws-with-string-receiver.js
@@ -0,0 +1,38 @@
+// Copyright (C) 2020 Sony Interactive Entertainment Inc. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.push
+description: >
+  Array#push throws TypeError upon attempting to modify a string
+info: |
+  Array.prototype.push ( ...items )
+  ...
+  6. Repeat, while items is not empty
+    ...
+    b. Perform ? Set(O, ! ToString(len), E, true).
+    ...
+  7. Perform ? Set(O, "length", len, true).
+
+  Set ( O, P, V, Throw )
+  ...
+  4. Let success be ? O.[[Set]](P, V, O).
+  5. If success is false and Throw is true, throw a TypeError exception.
+---*/
+
+assert.throws(TypeError, () => {
+  Array.prototype.push.call('');
+}, "Array.prototype.push.call('')");
+
+assert.throws(TypeError, () => {
+  Array.prototype.push.call('', 1);
+}, "Array.prototype.push.call('', 1)");
+
+assert.throws(TypeError, () => {
+  Array.prototype.push.call('abc');
+}, "Array.prototype.push.call('abc')");
+
+assert.throws(TypeError, () => {
+  Array.prototype.push.call('abc', 1);
+}, "Array.prototype.push.call('abc', 1)");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-1-1.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-1-1.js
new file mode 100644
index 0000000000..f602de688b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-1-1.js
@@ -0,0 +1,14 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: Array.prototype.reduce applied to undefined
+---*/
+
+
+assert.throws(TypeError, function() {
+  Array.prototype.reduce.call(undefined);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-1-10.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-1-10.js
new file mode 100644
index 0000000000..356831c93f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-1-10.js
@@ -0,0 +1,18 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: Array.prototype.reduce applied to the Math object
+---*/
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  return ('[object Math]' === Object.prototype.toString.call(obj));
+}
+
+Math.length = 1;
+Math[0] = 1;
+
+assert(Array.prototype.reduce.call(Math, callbackfn, 1), 'Array.prototype.reduce.call(Math, callbackfn, 1) !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-1-11.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-1-11.js
new file mode 100644
index 0000000000..e7c228f2fa
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-1-11.js
@@ -0,0 +1,19 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: Array.prototype.reduce applied to Date object
+---*/
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  return obj instanceof Date;
+}
+
+var obj = new Date();
+obj.length = 1;
+obj[0] = 1;
+
+assert(Array.prototype.reduce.call(obj, callbackfn, 1), 'Array.prototype.reduce.call(obj, callbackfn, 1) !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-1-12.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-1-12.js
new file mode 100644
index 0000000000..7b9841d843
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-1-12.js
@@ -0,0 +1,19 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: Array.prototype.reduce applied to RegExp object
+---*/
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  return obj instanceof RegExp;
+}
+
+var obj = new RegExp();
+obj.length = 1;
+obj[0] = 1;
+
+assert(Array.prototype.reduce.call(obj, callbackfn, 1), 'Array.prototype.reduce.call(obj, callbackfn, 1) !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-1-13.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-1-13.js
new file mode 100644
index 0000000000..e336ea2370
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-1-13.js
@@ -0,0 +1,18 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: Array.prototype.reduce applied to the JSON object
+---*/
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  return ('[object JSON]' === Object.prototype.toString.call(obj));
+}
+
+JSON.length = 1;
+JSON[0] = 1;
+
+assert(Array.prototype.reduce.call(JSON, callbackfn, 1), 'Array.prototype.reduce.call(JSON, callbackfn, 1) !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-1-14.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-1-14.js
new file mode 100644
index 0000000000..0265a4209e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-1-14.js
@@ -0,0 +1,19 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: Array.prototype.reduce applied to Error object
+---*/
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  return obj instanceof Error;
+}
+
+var obj = new Error();
+obj.length = 1;
+obj[0] = 1;
+
+assert(Array.prototype.reduce.call(obj, callbackfn, 1), 'Array.prototype.reduce.call(obj, callbackfn, 1) !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-1-15.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-1-15.js
new file mode 100644
index 0000000000..38f7254600
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-1-15.js
@@ -0,0 +1,19 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: Array.prototype.reduce applied to the Arguments object
+---*/
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  return ('[object Arguments]' === Object.prototype.toString.call(obj));
+}
+
+var obj = (function() {
+  return arguments;
+}("a", "b"));
+
+assert(Array.prototype.reduce.call(obj, callbackfn, 1), 'Array.prototype.reduce.call(obj, callbackfn, 1) !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-1-2.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-1-2.js
new file mode 100644
index 0000000000..71a935eda1
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-1-2.js
@@ -0,0 +1,14 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: Array.prototype.reduce applied to null
+---*/
+
+
+assert.throws(TypeError, function() {
+  Array.prototype.reduce.call(null);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-1-3.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-1-3.js
new file mode 100644
index 0000000000..7288e5a23d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-1-3.js
@@ -0,0 +1,18 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: Array.prototype.reduce applied to boolean primitive
+---*/
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  return obj instanceof Boolean;
+}
+
+Boolean.prototype[0] = true;
+Boolean.prototype.length = 1;
+
+assert(Array.prototype.reduce.call(false, callbackfn, 1), 'Array.prototype.reduce.call(false, callbackfn, 1) !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-1-4.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-1-4.js
new file mode 100644
index 0000000000..a8026dec51
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-1-4.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: Array.prototype.reduce applied to Boolean object
+---*/
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  return obj instanceof Boolean;
+}
+
+var obj = new Boolean(true);
+obj.length = 2;
+obj[0] = 11;
+obj[1] = 12;
+
+assert(Array.prototype.reduce.call(obj, callbackfn, 1), 'Array.prototype.reduce.call(obj, callbackfn, 1) !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-1-5.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-1-5.js
new file mode 100644
index 0000000000..48c2e67a3f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-1-5.js
@@ -0,0 +1,18 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: Array.prototype.reduce applied to number primitive
+---*/
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  return obj instanceof Number;
+}
+
+Number.prototype[0] = 1;
+Number.prototype.length = 1;
+
+assert(Array.prototype.reduce.call(2.5, callbackfn, 1), 'Array.prototype.reduce.call(2.5, callbackfn, 1) !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-1-6.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-1-6.js
new file mode 100644
index 0000000000..174051b42b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-1-6.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: Array.prototype.reduce applied to Number object
+---*/
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  return obj instanceof Number;
+}
+
+var obj = new Number(-128);
+obj.length = 2;
+obj[0] = 11;
+obj[1] = 12;
+
+assert(Array.prototype.reduce.call(obj, callbackfn, 1), 'Array.prototype.reduce.call(obj, callbackfn, 1) !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-1-7.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-1-7.js
new file mode 100644
index 0000000000..a49a2f72d4
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-1-7.js
@@ -0,0 +1,15 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: Array.prototype.reduce applied to string primitive
+---*/
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  return obj instanceof String;
+}
+
+assert(Array.prototype.reduce.call("abc", callbackfn, 1), 'Array.prototype.reduce.call("abc", callbackfn, 1) !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-1-8.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-1-8.js
new file mode 100644
index 0000000000..3bd7f04768
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-1-8.js
@@ -0,0 +1,17 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: Array.prototype.reduce applied to String object
+---*/
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  return obj instanceof String;
+}
+
+var obj = new String("abc");
+
+assert(Array.prototype.reduce.call(obj, callbackfn, 1), 'Array.prototype.reduce.call(obj, callbackfn, 1) !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-1-9.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-1-9.js
new file mode 100644
index 0000000000..f4d55a0b8f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-1-9.js
@@ -0,0 +1,21 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: Array.prototype.reduce applied to Function object
+---*/
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  return obj instanceof Function;
+}
+
+var obj = function(a, b) {
+  return a + b;
+};
+obj[0] = 11;
+obj[1] = 9;
+
+assert(Array.prototype.reduce.call(obj, callbackfn, 1), 'Array.prototype.reduce.call(obj, callbackfn, 1) !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-10-1.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-10-1.js
new file mode 100644
index 0000000000..ab069463b9
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-10-1.js
@@ -0,0 +1,24 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce doesn't mutate the Array on which it is
+    called on
+---*/
+
+function callbackfn(prevVal, curVal, idx, obj)
+{
+  return 1;
+}
+var srcArr = [1, 2, 3, 4, 5];
+srcArr.reduce(callbackfn);
+
+assert.sameValue(srcArr[0], 1, 'srcArr[0]');
+assert.sameValue(srcArr[1], 2, 'srcArr[1]');
+assert.sameValue(srcArr[2], 3, 'srcArr[2]');
+assert.sameValue(srcArr[3], 4, 'srcArr[3]');
+assert.sameValue(srcArr[4], 5, 'srcArr[4]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-10-2.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-10-2.js
new file mode 100644
index 0000000000..7ed501c653
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-10-2.js
@@ -0,0 +1,19 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce reduces the array in ascending order of
+    indices
+---*/
+
+function callbackfn(prevVal, curVal, idx, obj)
+{
+  return prevVal + curVal;
+}
+var srcArr = ['1', '2', '3', '4', '5'];
+
+assert.sameValue(srcArr.reduce(callbackfn), '12345', 'srcArr.reduce(callbackfn)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-10-3.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-10-3.js
new file mode 100644
index 0000000000..7a91f97074
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-10-3.js
@@ -0,0 +1,18 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: Array.prototype.reduce - subclassed array of length 1
+---*/
+
+foo.prototype = [1];
+
+function foo() {}
+var f = new foo();
+
+function cb() {}
+
+assert.sameValue(f.reduce(cb), 1, 'f.reduce(cb)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-10-4.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-10-4.js
new file mode 100644
index 0000000000..9670ccae3d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-10-4.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: Array.prototype.reduce - subclassed array with length more than 1
+---*/
+
+foo.prototype = new Array(1, 2, 3, 4);
+
+function foo() {}
+var f = new foo();
+
+function cb(prevVal, curVal, idx, obj) {
+  return prevVal + curVal;
+}
+
+assert.sameValue(f.reduce(cb), 10, 'f.reduce(cb)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-10-5.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-10-5.js
new file mode 100644
index 0000000000..c29ea02ed1
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-10-5.js
@@ -0,0 +1,19 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce reduces the array in ascending order of
+    indices(initialvalue present)
+---*/
+
+function callbackfn(prevVal, curVal, idx, obj)
+{
+  return prevVal + curVal;
+}
+var srcArr = ['1', '2', '3', '4', '5'];
+
+assert.sameValue(srcArr.reduce(callbackfn, '0'), '012345', 'srcArr.reduce(callbackfn,"0")');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-10-6.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-10-6.js
new file mode 100644
index 0000000000..d007e84a0a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-10-6.js
@@ -0,0 +1,22 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - subclassed array when initialvalue
+    provided
+---*/
+
+foo.prototype = [1, 2, 3, 4];
+
+function foo() {}
+var f = new foo();
+
+function cb(prevVal, curVal, idx, obj) {
+  return prevVal + curVal;
+}
+
+assert.sameValue(f.reduce(cb, -1), 9, 'f.reduce(cb,-1)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-10-7.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-10-7.js
new file mode 100644
index 0000000000..3e3e1b039e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-10-7.js
@@ -0,0 +1,22 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - subclassed array with length 1 and
+    initialvalue provided
+---*/
+
+foo.prototype = [1];
+
+function foo() {}
+var f = new foo();
+
+function cb(prevVal, curVal, idx, obj) {
+  return prevVal + curVal;
+}
+
+assert.sameValue(f.reduce(cb, -1), 0, 'f.reduce(cb,-1)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-10-8.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-10-8.js
new file mode 100644
index 0000000000..a13c8c6f39
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-10-8.js
@@ -0,0 +1,23 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: Array.prototype.reduce doesn't visit expandos
+---*/
+
+var callCnt = 0;
+
+function callbackfn(prevVal, curVal, idx, obj)
+{
+  callCnt++;
+  return curVal;
+}
+var srcArr = ['1', '2', '3', '4', '5'];
+srcArr["i"] = 10;
+srcArr[true] = 11;
+srcArr.reduce(callbackfn);
+
+assert.sameValue(callCnt, 4, 'callCnt');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-2-1.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-2-1.js
new file mode 100644
index 0000000000..b45ecf4a0d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-2-1.js
@@ -0,0 +1,24 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - 'length' is own data property on an
+    Array-like object
+---*/
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  return (obj.length === 2);
+}
+
+var obj = {
+  0: 12,
+  1: 11,
+  2: 9,
+  length: 2
+};
+
+assert.sameValue(Array.prototype.reduce.call(obj, callbackfn, 1), true, 'Array.prototype.reduce.call(obj, callbackfn, 1)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-2-10.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-2-10.js
new file mode 100644
index 0000000000..a73d8c2115
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-2-10.js
@@ -0,0 +1,34 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce applied to Array-like object, 'length' is
+    an inherited accessor property
+---*/
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  return (obj.length === 2);
+}
+
+var proto = {};
+
+Object.defineProperty(proto, "length", {
+  get: function() {
+    return 2;
+  },
+  configurable: true
+});
+
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+child[0] = 12;
+child[1] = 11;
+child[2] = 9;
+
+assert.sameValue(Array.prototype.reduce.call(child, callbackfn, 1), true, 'Array.prototype.reduce.call(child, callbackfn, 1)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-2-11.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-2-11.js
new file mode 100644
index 0000000000..26a9bded1c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-2-11.js
@@ -0,0 +1,29 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce applied to Array-like object, 'length' is
+    an own accessor property without a get function
+---*/
+
+var accessed = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  accessed = true;
+}
+
+var obj = {
+  0: 11,
+  1: 12
+};
+Object.defineProperty(obj, "length", {
+  set: function() {},
+  configurable: true
+});
+
+assert.sameValue(Array.prototype.reduce.call(obj, callbackfn, 1), 1, 'Array.prototype.reduce.call(obj, callbackfn, 1)');
+assert.sameValue(accessed, false, 'accessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-2-12.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-2-12.js
new file mode 100644
index 0000000000..7496112e3b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-2-12.js
@@ -0,0 +1,37 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - 'length' is own accessor property without
+    a get function that overrides an inherited accessor property on an
+    Array
+---*/
+
+var accessed = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  accessed = true;
+}
+
+Object.defineProperty(Object.prototype, "length", {
+  get: function() {
+    return 2;
+  },
+  configurable: true
+});
+
+var obj = {
+  0: 12,
+  1: 11
+};
+Object.defineProperty(obj, "length", {
+  set: function() {},
+  configurable: true
+});
+
+assert.sameValue(Array.prototype.reduce.call(obj, callbackfn, 1), 1, 'Array.prototype.reduce.call(obj, callbackfn, 1)');
+assert.sameValue(accessed, false, 'accessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-2-13.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-2-13.js
new file mode 100644
index 0000000000..fdcedaf33f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-2-13.js
@@ -0,0 +1,33 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce applied to Array-like object that 'length'
+    is inherited accessor property without a get function
+---*/
+
+var accessed = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  accessed = true;
+}
+
+var proto = {};
+Object.defineProperty(proto, "length", {
+  set: function() {},
+  configurable: true
+});
+
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+child[0] = 11;
+child[1] = 12;
+
+assert.sameValue(Array.prototype.reduce.call(child, callbackfn, 1), 1, 'Array.prototype.reduce.call(child, callbackfn, 1)');
+assert.sameValue(accessed, false, 'accessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-2-14.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-2-14.js
new file mode 100644
index 0000000000..a399b536e7
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-2-14.js
@@ -0,0 +1,25 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce applied to the Array-like object that
+    'length' property doesn't exist
+---*/
+
+var accessed = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  accessed = true;
+}
+
+var obj = {
+  0: 11,
+  1: 12
+};
+
+assert.sameValue(Array.prototype.reduce.call(obj, callbackfn, 1), 1, 'Array.prototype.reduce.call(obj, callbackfn, 1)');
+assert.sameValue(accessed, false, 'accessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-2-17.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-2-17.js
new file mode 100644
index 0000000000..db35b46d4d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-2-17.js
@@ -0,0 +1,22 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce applied to the Arguments object, which
+    implements its own property get method
+---*/
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  return (obj.length === 2);
+}
+
+var func = function(a, b) {
+  arguments[2] = 9;
+  return Array.prototype.reduce.call(arguments, callbackfn, 1);
+};
+
+assert.sameValue(func(12, 11), true, 'func(12, 11)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-2-18.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-2-18.js
new file mode 100644
index 0000000000..cf6c09d672
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-2-18.js
@@ -0,0 +1,19 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce applied to String object, which implements
+    its own property get method
+---*/
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  return (obj.length === 3);
+}
+
+var str = new String("012");
+
+assert.sameValue(Array.prototype.reduce.call(str, callbackfn, 1), true, 'Array.prototype.reduce.call(str, callbackfn, 1)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-2-19.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-2-19.js
new file mode 100644
index 0000000000..dd0066d782
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-2-19.js
@@ -0,0 +1,24 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce applied to Function object, which
+    implements its own property get method
+---*/
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  return (obj.length === 2);
+}
+
+var fun = function(a, b) {
+  return a + b;
+};
+fun[0] = 12;
+fun[1] = 11;
+fun[2] = 9;
+
+assert.sameValue(Array.prototype.reduce.call(fun, callbackfn, 1), true, 'Array.prototype.reduce.call(fun, callbackfn, 1)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-2-2.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-2-2.js
new file mode 100644
index 0000000000..949641eda5
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-2-2.js
@@ -0,0 +1,15 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: Array.prototype.reduce - 'length' is own data property on an Array
+---*/
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  return (obj.length === 2);
+}
+
+assert.sameValue([12, 11].reduce(callbackfn, 1), true, '[12, 11].reduce(callbackfn, 1)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-2-3.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-2-3.js
new file mode 100644
index 0000000000..6d4aed1c5e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-2-3.js
@@ -0,0 +1,30 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - 'length' is an own data property that
+    overrides an inherited data property on an Array-like object
+---*/
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  return (obj.length === 2);
+}
+
+var proto = {
+  length: 3
+};
+
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+child.length = 2;
+child[0] = 12;
+child[1] = 11;
+child[2] = 9;
+
+assert.sameValue(Array.prototype.reduce.call(child, callbackfn, 1), true, 'Array.prototype.reduce.call(child, callbackfn, 1)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-2-4.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-2-4.js
new file mode 100644
index 0000000000..042b286c01
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-2-4.js
@@ -0,0 +1,22 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - 'length' is own data property that
+    overrides an inherited data property on an Array
+---*/
+
+var storeProtoLength;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  return (obj.length === 2);
+}
+
+storeProtoLength = Array.prototype.length;
+Array.prototype.length = 0;
+
+assert.sameValue([12, 11].reduce(callbackfn, 1), true, '[12, 11].reduce(callbackfn, 1)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-2-5.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-2-5.js
new file mode 100644
index 0000000000..f2143fdd03
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-2-5.js
@@ -0,0 +1,38 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce applied to Array-like object, 'length' is
+    an own data property that overrides an inherited accessor property
+---*/
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  return (obj.length === 2);
+}
+
+var proto = {};
+
+Object.defineProperty(proto, "length", {
+  get: function() {
+    return 3;
+  },
+  configurable: true
+});
+
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+Object.defineProperty(child, "length", {
+  value: 2,
+  configurable: true
+});
+child[0] = 12;
+child[1] = 11;
+child[2] = 9;
+
+assert.sameValue(Array.prototype.reduce.call(child, callbackfn, 1), true, 'Array.prototype.reduce.call(child, callbackfn, 1)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-2-6.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-2-6.js
new file mode 100644
index 0000000000..9419869526
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-2-6.js
@@ -0,0 +1,29 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce applied to Array-like object, 'length' is
+    an inherited data property
+---*/
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  return (obj.length === 2);
+}
+
+var proto = {
+  length: 2
+};
+
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+child[0] = 12;
+child[1] = 11;
+child[2] = 9;
+
+assert.sameValue(Array.prototype.reduce.call(child, callbackfn, 1), true, 'Array.prototype.reduce.call(child, callbackfn, 1)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-2-7.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-2-7.js
new file mode 100644
index 0000000000..fc1f9989f0
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-2-7.js
@@ -0,0 +1,30 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce applied to Array-like object, 'length' is
+    an own accessor property
+---*/
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  return (obj.length === 2);
+}
+
+var obj = {};
+
+Object.defineProperty(obj, "length", {
+  get: function() {
+    return 2;
+  },
+  configurable: true
+});
+
+obj[0] = 12;
+obj[1] = 11;
+obj[2] = 9;
+
+assert.sameValue(Array.prototype.reduce.call(obj, callbackfn, 1), true, 'Array.prototype.reduce.call(obj, callbackfn, 1)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-2-8.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-2-8.js
new file mode 100644
index 0000000000..7f42726b4d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-2-8.js
@@ -0,0 +1,37 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce applied to Array-like object, 'length' is
+    an own accessor property that overrides an inherited data property
+---*/
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  return (obj.length === 2);
+}
+
+var proto = {
+  length: 3
+};
+
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+
+Object.defineProperty(child, "length", {
+  get: function() {
+    return 2;
+  },
+  configurable: true
+});
+
+child[0] = 12;
+child[1] = 11;
+child[2] = 9;
+
+assert.sameValue(Array.prototype.reduce.call(child, callbackfn, 1), true, 'Array.prototype.reduce.call(child, callbackfn, 1)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-2-9.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-2-9.js
new file mode 100644
index 0000000000..1d074a9b15
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-2-9.js
@@ -0,0 +1,43 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce applied to Array-like object, 'length' is
+    an own accessor property that overrides an inherited accessor
+    property
+---*/
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  return (obj.length === 2);
+}
+
+var proto = {};
+
+Object.defineProperty(proto, "length", {
+  get: function() {
+    return 3;
+  },
+  configurable: true
+});
+
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+
+Object.defineProperty(child, "length", {
+  get: function() {
+    return 2;
+  },
+  configurable: true
+});
+
+child[0] = 12;
+child[1] = 11;
+child[2] = 9;
+
+assert.sameValue(Array.prototype.reduce.call(child, callbackfn, 1), true, 'Array.prototype.reduce.call(child, callbackfn, 1)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-3-1.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-3-1.js
new file mode 100644
index 0000000000..2ec0cf620b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-3-1.js
@@ -0,0 +1,25 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: Array.prototype.reduce - value of 'length' is undefined
+---*/
+
+var accessed = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  accessed = true;
+  return 2;
+}
+
+var obj = {
+  0: 0,
+  1: 1,
+  length: undefined
+};
+
+assert.sameValue(Array.prototype.reduce.call(obj, callbackfn, 1), 1, 'Array.prototype.reduce.call(obj, callbackfn, 1)');
+assert.sameValue(accessed, false, 'accessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-3-10.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-3-10.js
new file mode 100644
index 0000000000..a1804686f8
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-3-10.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - value of 'length' is number primitive
+    (value is NaN)
+---*/
+
+var accessed = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  accessed = true;
+  return 2;
+}
+
+var obj = {
+  0: 9,
+  length: NaN
+};
+
+assert.sameValue(Array.prototype.reduce.call(obj, callbackfn, 1), 1, 'Array.prototype.reduce.call(obj, callbackfn, 1)');
+assert.sameValue(accessed, false, 'accessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-3-11.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-3-11.js
new file mode 100644
index 0000000000..3cbf90142b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-3-11.js
@@ -0,0 +1,23 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - 'length' is a string containing a
+    positive number
+---*/
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  return (curVal === 11 && idx === 1);
+}
+
+var obj = {
+  1: 11,
+  2: 9,
+  length: "2"
+};
+
+assert.sameValue(Array.prototype.reduce.call(obj, callbackfn, 1), true, 'Array.prototype.reduce.call(obj, callbackfn, 1)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-3-12.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-3-12.js
new file mode 100644
index 0000000000..ffe6c68194
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-3-12.js
@@ -0,0 +1,23 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - 'length' is a string containing a
+    negative number
+---*/
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  return (curVal === 11 && idx === 1);
+}
+
+var obj = {
+  1: 11,
+  2: 9,
+  length: "-4294967294"
+};
+
+assert.sameValue(Array.prototype.reduce.call(obj, callbackfn, 1), 1, 'Array.prototype.reduce.call(obj, callbackfn, 1)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-3-13.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-3-13.js
new file mode 100644
index 0000000000..7e1c114565
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-3-13.js
@@ -0,0 +1,23 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - 'length' is a string containing a decimal
+    number
+---*/
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  return (curVal === 11 && idx === 1);
+}
+
+var obj = {
+  1: 11,
+  2: 9,
+  length: "2.5"
+};
+
+assert.sameValue(Array.prototype.reduce.call(obj, callbackfn, 1), true, 'Array.prototype.reduce.call(obj, callbackfn, 1)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-3-14.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-3-14.js
new file mode 100644
index 0000000000..d1499f13bd
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-3-14.js
@@ -0,0 +1,24 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: Array.prototype.reduce - 'length' is a string containing -Infinity
+---*/
+
+var accessed2 = false;
+
+function callbackfn2(prevVal, curVal, idx, obj) {
+  accessed2 = true;
+  return 2;
+}
+
+var obj2 = {
+  0: 9,
+  length: "-Infinity"
+};
+
+assert.sameValue(Array.prototype.reduce.call(obj2, callbackfn2, 1), 1, 'Array.prototype.reduce.call(obj2, callbackfn2, 1)');
+assert.sameValue(accessed2, false, 'accessed2');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-3-15.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-3-15.js
new file mode 100644
index 0000000000..b4c5e25ea6
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-3-15.js
@@ -0,0 +1,23 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - 'length' is a string containing an
+    exponential number
+---*/
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  return (curVal === 11 && idx === 1);
+}
+
+var obj = {
+  1: 11,
+  2: 9,
+  length: "2E0"
+};
+
+assert.sameValue(Array.prototype.reduce.call(obj, callbackfn, 1), true, 'Array.prototype.reduce.call(obj, callbackfn, 1)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-3-16.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-3-16.js
new file mode 100644
index 0000000000..7928a8df66
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-3-16.js
@@ -0,0 +1,23 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - 'length' is a string containing a hex
+    number
+---*/
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  return (curVal === 11 && idx === 1);
+}
+
+var obj = {
+  1: 11,
+  2: 9,
+  length: "0x0002"
+};
+
+assert.sameValue(Array.prototype.reduce.call(obj, callbackfn, 1), true, 'Array.prototype.reduce.call(obj, callbackfn, 1)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-3-17.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-3-17.js
new file mode 100644
index 0000000000..1911ddb867
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-3-17.js
@@ -0,0 +1,23 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - 'length' is a string containing a number
+    with leading zeros
+---*/
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  return (curVal === 11 && idx === 1);
+}
+
+var obj = {
+  1: 11,
+  2: 9,
+  length: "0002.00"
+};
+
+assert.sameValue(Array.prototype.reduce.call(obj, callbackfn, 1), true, 'Array.prototype.reduce.call(obj, callbackfn, 1)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-3-18.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-3-18.js
new file mode 100644
index 0000000000..8b2401ca82
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-3-18.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - value of 'length' is a string that can't
+    convert to a number
+---*/
+
+var accessed = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  accessed = true;
+  return 2;
+}
+
+var obj = {
+  0: 9,
+  length: "asdf!_"
+};
+
+assert.sameValue(Array.prototype.reduce.call(obj, callbackfn, 1), 1, 'Array.prototype.reduce.call(obj, callbackfn, 1)');
+assert.sameValue(accessed, false, 'accessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-3-19.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-3-19.js
new file mode 100644
index 0000000000..06f303dd40
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-3-19.js
@@ -0,0 +1,27 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - value of 'length' is an Object which has
+    an own toString method
+---*/
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  return (curVal === 11 && idx === 1);
+}
+
+var obj = {
+  1: 11,
+  2: 9,
+  length: {
+    toString: function() {
+      return '2';
+    }
+  }
+};
+
+assert.sameValue(Array.prototype.reduce.call(obj, callbackfn, 1), true, 'Array.prototype.reduce.call(obj, callbackfn, 1)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-3-2.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-3-2.js
new file mode 100644
index 0000000000..d06dfa1602
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-3-2.js
@@ -0,0 +1,23 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - value of 'length' is a boolean (value is
+    true)
+---*/
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  return (curVal === 11 && idx === 0);
+}
+
+var obj = {
+  0: 11,
+  1: 9,
+  length: true
+};
+
+assert.sameValue(Array.prototype.reduce.call(obj, callbackfn, 1), true, 'Array.prototype.reduce.call(obj, callbackfn, 1)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-3-20.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-3-20.js
new file mode 100644
index 0000000000..32acae269e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-3-20.js
@@ -0,0 +1,27 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - value of 'length' is an object which has
+    an own valueOf method
+---*/
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  return (curVal === 11 && idx === 1);
+}
+
+var obj = {
+  1: 11,
+  2: 9,
+  length: {
+    valueOf: function() {
+      return 2;
+    }
+  }
+};
+
+assert.sameValue(Array.prototype.reduce.call(obj, callbackfn, 1), true, 'Array.prototype.reduce.call(obj, callbackfn, 1)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-3-21.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-3-21.js
new file mode 100644
index 0000000000..1b7b79d77d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-3-21.js
@@ -0,0 +1,38 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - 'length' is an object that has an own
+    valueOf method that returns an object and toString method that
+    returns a string
+---*/
+
+var valueOfOccured = false;
+var toStringOccured = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  return (curVal === 11 && idx === 1);
+}
+
+var obj = {
+  1: 11,
+  2: 9,
+  length: {
+    valueOf: function() {
+      valueOfOccured = true;
+      return {};
+    },
+    toString: function() {
+      toStringOccured = true;
+      return '2';
+    }
+  }
+};
+
+assert.sameValue(Array.prototype.reduce.call(obj, callbackfn, 1), true, 'Array.prototype.reduce.call(obj, callbackfn, 1)');
+assert(valueOfOccured, 'valueOfOccured !== true');
+assert(toStringOccured, 'toStringOccured !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-3-22.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-3-22.js
new file mode 100644
index 0000000000..bc8c06a453
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-3-22.js
@@ -0,0 +1,43 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce throws TypeError exception - 'length' is an
+    object with toString and valueOf methods that don�t return
+    primitive values
+---*/
+
+var accessed = false;
+var valueOfAccessed = false;
+var toStringAccessed = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  accessed = true;
+  return true;
+}
+
+var obj = {
+  1: 11,
+  2: 12,
+
+  length: {
+    valueOf: function() {
+      valueOfAccessed = true;
+      return {};
+    },
+    toString: function() {
+      toStringAccessed = true;
+      return {};
+    }
+  }
+};
+assert.throws(TypeError, function() {
+  Array.prototype.reduce.call(obj, callbackfn, 1);
+});
+assert.sameValue(accessed, false, 'accessed');
+assert(toStringAccessed, 'toStringAccessed !== true');
+assert(valueOfAccessed, 'valueOfAccessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-3-23.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-3-23.js
new file mode 100644
index 0000000000..3080520795
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-3-23.js
@@ -0,0 +1,45 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce uses inherited valueOf method - 'length' is
+    an object with an own toString and inherited valueOf methods
+---*/
+
+var valueOfAccessed = false;
+var toStringAccessed = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  return (curVal === 11 && idx === 1);
+}
+
+var proto = {
+  valueOf: function() {
+    valueOfAccessed = true;
+    return 2;
+  }
+};
+
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+
+child.toString = function() {
+  toStringAccessed = true;
+  return '1';
+};
+
+var obj = {
+  1: 11,
+  2: 9,
+  length: child
+};
+
+assert.sameValue(Array.prototype.reduce.call(obj, callbackfn, 1), true, 'Array.prototype.reduce.call(obj, callbackfn, 1)');
+assert(valueOfAccessed, 'valueOfAccessed !== true');
+assert.sameValue(toStringAccessed, false, 'toStringAccessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-3-24.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-3-24.js
new file mode 100644
index 0000000000..7c26c88bfd
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-3-24.js
@@ -0,0 +1,23 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - value of 'length' is a positive
+    non-integer, ensure truncation occurs in the proper direction
+---*/
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  return (curVal === 11 && idx === 1);
+}
+
+var obj = {
+  1: 11,
+  2: 9,
+  length: 2.685
+};
+
+assert.sameValue(Array.prototype.reduce.call(obj, callbackfn, 1), true, 'Array.prototype.reduce.call(obj, callbackfn, 1)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-3-25.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-3-25.js
new file mode 100644
index 0000000000..8f78496005
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-3-25.js
@@ -0,0 +1,23 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - value of 'length' is a negative
+    non-integer
+---*/
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  return (curVal === 11 && idx === 1);
+}
+
+var obj = {
+  1: 11,
+  2: 9,
+  length: -4294967294.5
+};
+
+assert.sameValue(Array.prototype.reduce.call(obj, callbackfn, 1), 1, 'Array.prototype.reduce.call(obj, callbackfn, 1)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-3-3.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-3-3.js
new file mode 100644
index 0000000000..9e21add920
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-3-3.js
@@ -0,0 +1,25 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: Array.prototype.reduce - value of 'length' is a number (value is 0)
+---*/
+
+var accessed = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  accessed = true;
+  return 2;
+}
+
+var obj = {
+  0: 1,
+  1: 1,
+  length: 0
+};
+
+assert.sameValue(Array.prototype.reduce.call(obj, callbackfn, 1), 1, 'Array.prototype.reduce.call(obj, callbackfn, 1)');
+assert.sameValue(accessed, false, 'accessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-3-4.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-3-4.js
new file mode 100644
index 0000000000..fa4858f288
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-3-4.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - value of 'length' is a number (value is
+    +0)
+---*/
+
+var accessed = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  accessed = true;
+  return 2;
+}
+
+var obj = {
+  0: 11,
+  length: +0
+};
+
+assert.sameValue(Array.prototype.reduce.call(obj, callbackfn, 1), 1, 'Array.prototype.reduce.call(obj, callbackfn, 1)');
+assert.sameValue(accessed, false, 'accessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-3-5.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-3-5.js
new file mode 100644
index 0000000000..27702d5054
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-3-5.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - value of 'length' is a number (value is
+    -0)
+---*/
+
+var accessed = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  accessed = true;
+  return 2;
+}
+
+var obj = {
+  0: 11,
+  length: -0
+};
+
+assert.sameValue(Array.prototype.reduce.call(obj, callbackfn, 1), 1, 'Array.prototype.reduce.call(obj, callbackfn, 1)');
+assert.sameValue(accessed, false, 'accessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-3-6.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-3-6.js
new file mode 100644
index 0000000000..e9de26b232
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-3-6.js
@@ -0,0 +1,23 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - value of 'length' is a number (value is
+    positive)
+---*/
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  return (curVal === 11 && idx === 1);
+}
+
+var obj = {
+  1: 11,
+  2: 9,
+  length: 2
+};
+
+assert.sameValue(Array.prototype.reduce.call(obj, callbackfn, 1), true, 'Array.prototype.reduce.call(obj, callbackfn, 1)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-3-7.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-3-7.js
new file mode 100644
index 0000000000..1cd375b0e9
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-3-7.js
@@ -0,0 +1,23 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - value of 'length' is a number (value is
+    negative)
+---*/
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  return (curVal === 11 && idx === 1);
+}
+
+var obj = {
+  1: 11,
+  2: 9,
+  length: -4294967294
+};
+
+assert.sameValue(Array.prototype.reduce.call(obj, callbackfn, 1), 1, 'Array.prototype.reduce.call(obj, callbackfn, 1)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-3-9.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-3-9.js
new file mode 100644
index 0000000000..adc4a1728c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-3-9.js
@@ -0,0 +1,25 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - value of 'length' is a number (value is
+    -Infinity)
+---*/
+
+var accessed = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  accessed = true;
+}
+
+var obj = {
+  0: 9,
+  length: -Infinity
+};
+
+assert.sameValue(Array.prototype.reduce.call(obj, callbackfn, 1), 1, 'Array.prototype.reduce.call(obj, callbackfn, 1)');
+assert.sameValue(accessed, false, 'accessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-4-1.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-4-1.js
new file mode 100644
index 0000000000..138fd34848
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-4-1.js
@@ -0,0 +1,14 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: Array.prototype.reduce throws TypeError if callbackfn is undefined
+---*/
+
+var arr = new Array(10);
+assert.throws(TypeError, function() {
+  arr.reduce();
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-4-10.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-4-10.js
new file mode 100644
index 0000000000..14b99fc322
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-4-10.js
@@ -0,0 +1,27 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - the exception is not thrown if exception
+    was thrown by step 2
+---*/
+
+var obj = {
+  0: 11,
+  1: 12
+};
+
+Object.defineProperty(obj, "length", {
+  get: function() {
+    throw new Test262Error();
+  },
+  configurable: true
+});
+
+assert.throws(Test262Error, function() {
+  Array.prototype.reduce.call(obj, undefined);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-4-11.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-4-11.js
new file mode 100644
index 0000000000..d073715f5a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-4-11.js
@@ -0,0 +1,31 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - the exception is not thrown if exception
+    was thrown by step 3
+---*/
+
+var obj = {
+  0: 11,
+  1: 12
+};
+
+Object.defineProperty(obj, "length", {
+  get: function() {
+    return {
+      toString: function() {
+        throw new Test262Error();
+      }
+    };
+  },
+  configurable: true
+});
+
+assert.throws(Test262Error, function() {
+  Array.prototype.reduce.call(obj, undefined);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-4-12.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-4-12.js
new file mode 100644
index 0000000000..9389b2b64c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-4-12.js
@@ -0,0 +1,19 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: Array.prototype.reduce - 'callbackfn' is a function
+---*/
+
+var accessed = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  accessed = true;
+  return curVal > 10;
+}
+
+assert.sameValue([11, 9].reduce(callbackfn, 1), false, '[11, 9].reduce(callbackfn, 1)');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-4-15.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-4-15.js
new file mode 100644
index 0000000000..4b4237e65d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-4-15.js
@@ -0,0 +1,38 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - calling with no callbackfn is the same as
+    passing undefined for callbackfn
+---*/
+
+var obj = {
+  10: 10
+};
+var lengthAccessed = false;
+var loopAccessed = false;
+
+Object.defineProperty(obj, "length", {
+  get: function() {
+    lengthAccessed = true;
+    return 20;
+  },
+  configurable: true
+});
+
+Object.defineProperty(obj, "0", {
+  get: function() {
+    loopAccessed = true;
+    return 10;
+  },
+  configurable: true
+});
+assert.throws(TypeError, function() {
+  Array.prototype.reduce.call(obj);
+});
+assert(lengthAccessed, 'lengthAccessed !== true');
+assert.sameValue(loopAccessed, false, 'loopAccessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-4-2.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-4-2.js
new file mode 100644
index 0000000000..9bea9ce912
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-4-2.js
@@ -0,0 +1,16 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce throws ReferenceError if callbackfn is
+    unreferenced
+---*/
+
+var arr = new Array(10);
+assert.throws(ReferenceError, function() {
+  arr.reduce(foo);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-4-3.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-4-3.js
new file mode 100644
index 0000000000..b9232b42ed
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-4-3.js
@@ -0,0 +1,14 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: Array.prototype.reduce throws TypeError if callbackfn is null
+---*/
+
+var arr = new Array(10);
+assert.throws(TypeError, function() {
+  arr.reduce(null);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-4-4.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-4-4.js
new file mode 100644
index 0000000000..e0a4572124
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-4-4.js
@@ -0,0 +1,14 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: Array.prototype.reduce throws TypeError if callbackfn is boolean
+---*/
+
+var arr = new Array(10);
+assert.throws(TypeError, function() {
+  arr.reduce(true);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-4-5.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-4-5.js
new file mode 100644
index 0000000000..7fb3d394d2
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-4-5.js
@@ -0,0 +1,14 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: Array.prototype.reduce throws TypeError if callbackfn is number
+---*/
+
+var arr = new Array(10);
+assert.throws(TypeError, function() {
+  arr.reduce(5);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-4-6.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-4-6.js
new file mode 100644
index 0000000000..7a47ca27b8
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-4-6.js
@@ -0,0 +1,14 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: Array.prototype.reduce throws TypeError if callbackfn is string
+---*/
+
+var arr = new Array(10);
+assert.throws(TypeError, function() {
+  arr.reduce("abc");
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-4-7.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-4-7.js
new file mode 100644
index 0000000000..57a4a96a02
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-4-7.js
@@ -0,0 +1,16 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce throws TypeError if callbackfn is Object
+    without [[Call]] internal method
+---*/
+
+var arr = new Array(10);
+assert.throws(TypeError, function() {
+  arr.reduce(new Object());
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-4-8.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-4-8.js
new file mode 100644
index 0000000000..54061e6426
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-4-8.js
@@ -0,0 +1,30 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - side effects produced by step 2 are
+    visible when an exception occurs
+---*/
+
+var obj = {
+  0: 11,
+  1: 12
+};
+
+var accessed = false;
+
+Object.defineProperty(obj, "length", {
+  get: function() {
+    accessed = true;
+    return 2;
+  },
+  configurable: true
+});
+assert.throws(TypeError, function() {
+  Array.prototype.reduce.call(obj, null);
+});
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-4-9.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-4-9.js
new file mode 100644
index 0000000000..f5b1c92d75
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-4-9.js
@@ -0,0 +1,34 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - side effects produced by step 3 are
+    visible when an exception occurs
+---*/
+
+var obj = {
+  0: 11,
+  1: 12
+};
+
+var accessed = false;
+
+Object.defineProperty(obj, "length", {
+  get: function() {
+    return {
+      toString: function() {
+        accessed = true;
+        return "2";
+      }
+    };
+  },
+  configurable: true
+});
+assert.throws(TypeError, function() {
+  Array.prototype.reduce.call(obj, null);
+});
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-5-1.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-5-1.js
new file mode 100644
index 0000000000..c665eff2ab
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-5-1.js
@@ -0,0 +1,16 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce throws TypeError if 'length' is 0 (empty
+    array), no initVal
+---*/
+
+function cb() {}
+assert.throws(TypeError, function() {
+  [].reduce(cb);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-5-10.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-5-10.js
new file mode 100644
index 0000000000..d59f525060
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-5-10.js
@@ -0,0 +1,34 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - if exception occurs, it occurs after any
+    side-effects that might be produced by step 2
+---*/
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  return (curVal > 10);
+}
+
+var obj = {
+  0: 11,
+  1: 12
+};
+
+var accessed = false;
+
+Object.defineProperty(obj, "length", {
+  get: function() {
+    accessed = true;
+    return 0;
+  },
+  configurable: true
+});
+assert.throws(TypeError, function() {
+  Array.prototype.reduce.call(obj, callbackfn);
+});
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-5-11.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-5-11.js
new file mode 100644
index 0000000000..672956e033
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-5-11.js
@@ -0,0 +1,38 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - if the exception occurs, it occurs after
+    any side-effects that might be produced by step 3
+---*/
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  return (curVal > 10);
+}
+
+var obj = {
+  0: 11,
+  1: 12
+};
+
+var accessed = false;
+
+Object.defineProperty(obj, "length", {
+  get: function() {
+    return {
+      toString: function() {
+        accessed = true;
+        return "0";
+      }
+    };
+  },
+  configurable: true
+});
+assert.throws(TypeError, function() {
+  Array.prototype.reduce.call(obj, callbackfn);
+});
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-5-12.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-5-12.js
new file mode 100644
index 0000000000..db3cb0f5d7
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-5-12.js
@@ -0,0 +1,31 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - the exception is not thrown if exception
+    was thrown by step 2
+---*/
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  return (curVal > 10);
+}
+
+var obj = {
+  0: 11,
+  1: 12
+};
+
+Object.defineProperty(obj, "length", {
+  get: function() {
+    throw new Test262Error();
+  },
+  configurable: true
+});
+
+assert.throws(Test262Error, function() {
+  Array.prototype.reduce.call(obj, callbackfn);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-5-13.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-5-13.js
new file mode 100644
index 0000000000..20f6727d71
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-5-13.js
@@ -0,0 +1,35 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - the exception is not thrown if exception
+    was thrown by step 3
+---*/
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  return (curVal > 10);
+}
+
+var obj = {
+  0: 11,
+  1: 12
+};
+
+Object.defineProperty(obj, "length", {
+  get: function() {
+    return {
+      toString: function() {
+        throw new Test262Error();
+      }
+    };
+  },
+  configurable: true
+});
+
+assert.throws(Test262Error, function() {
+  Array.prototype.reduce.call(obj, callbackfn);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-5-2.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-5-2.js
new file mode 100644
index 0000000000..4f9fe2d884
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-5-2.js
@@ -0,0 +1,23 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce throws TypeError if 'length' is 0
+    (subclassed Array, length overridden to null (type conversion)),
+    no initVal
+---*/
+
+foo.prototype = new Array(1, 2, 3);
+
+function foo() {}
+var f = new foo();
+f.length = null;
+
+function cb() {}
+assert.throws(TypeError, function() {
+  f.reduce(cb);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-5-3.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-5-3.js
new file mode 100644
index 0000000000..54fbaf0e0c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-5-3.js
@@ -0,0 +1,23 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce throws TypeError if 'length' is 0
+    (subclassed Array, length overridden to false (type conversion)),
+    no initVal
+---*/
+
+foo.prototype = new Array(1, 2, 3);
+
+function foo() {}
+var f = new foo();
+f.length = false;
+
+function cb() {}
+assert.throws(TypeError, function() {
+  f.reduce(cb);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-5-4.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-5-4.js
new file mode 100644
index 0000000000..c1873c8b9f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-5-4.js
@@ -0,0 +1,23 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce throws TypeError if 'length' is 0
+    (subclassed Array, length overridden to 0 (type conversion)), no
+    initVal
+---*/
+
+foo.prototype = new Array(1, 2, 3);
+
+function foo() {}
+var f = new foo();
+f.length = 0;
+
+function cb() {}
+assert.throws(TypeError, function() {
+  f.reduce(cb);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-5-5.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-5-5.js
new file mode 100644
index 0000000000..6ae8488fb8
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-5-5.js
@@ -0,0 +1,23 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce throws TypeError if 'length' is 0
+    (subclassed Array, length overridden to '0' (type conversion)), no
+    initVal
+---*/
+
+foo.prototype = new Array(1, 2, 3);
+
+function foo() {}
+var f = new foo();
+f.length = '0';
+
+function cb() {}
+assert.throws(TypeError, function() {
+  f.reduce(cb);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-5-6.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-5-6.js
new file mode 100644
index 0000000000..9dd7b8e094
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-5-6.js
@@ -0,0 +1,29 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce throws TypeError if 'length' is 0
+    (subclassed Array, length overridden with obj with valueOf), no
+    initVal
+---*/
+
+foo.prototype = new Array(1, 2, 3);
+
+function foo() {}
+var f = new foo();
+
+var o = {
+  valueOf: function() {
+    return 0;
+  }
+};
+f.length = o;
+
+function cb() {}
+assert.throws(TypeError, function() {
+  f.reduce(cb);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-5-7.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-5-7.js
new file mode 100644
index 0000000000..b6777f6da2
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-5-7.js
@@ -0,0 +1,35 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce throws TypeError if 'length' is 0
+    (subclassed Array, length overridden with obj w/o valueOf
+    (toString)), no initVal
+---*/
+
+foo.prototype = new Array(1, 2, 3);
+
+function foo() {}
+var f = new foo();
+
+var o = {
+  toString: function() {
+    return '0';
+  }
+};
+f.length = o;
+
+// objects inherit the default valueOf method of the Object object;
+// that simply returns the itself. Since the default valueOf() method
+// does not return a primitive value, ES next tries to convert the object
+// to a number by calling its toString() method and converting the
+// resulting string to a number.
+
+function cb() {}
+assert.throws(TypeError, function() {
+  f.reduce(cb);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-5-8.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-5-8.js
new file mode 100644
index 0000000000..c49b1f8484
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-5-8.js
@@ -0,0 +1,37 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce throws TypeError if 'length' is 0
+    (subclassed Array, length overridden with []), no initVal
+---*/
+
+foo.prototype = new Array(1, 2, 3);
+
+function foo() {}
+var f = new foo();
+
+f.length = [];
+
+// objects inherit the default valueOf method of the Object object;
+// that simply returns the itself. Since the default valueOf() method
+// does not return a primitive value, ES next tries to convert the object
+// to a number by calling its toString() method and converting the
+// resulting string to a number.
+//
+// The toString( ) method on Array converts the array elements to strings,
+// then returns the result of concatenating these strings, with commas in
+// between. An array with no elements converts to the empty string, which
+// converts to the number 0. If an array has a single element that is a
+// number n, the array converts to a string representation of n, which is
+// then converted back to n itself. If an array contains more than one element,
+// or if its one element is not a number, the array converts to NaN.
+
+function cb() {}
+assert.throws(TypeError, function() {
+  f.reduce(cb);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-5-9.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-5-9.js
new file mode 100644
index 0000000000..4b21500a96
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-5-9.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - 'initialValue' is returned if 'len' is 0
+    and 'initialValue' is present
+---*/
+
+var accessed = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  accessed = true;
+}
+
+assert.sameValue([].reduce(callbackfn, 3), 3, '[].reduce(callbackfn, 3)');
+assert.sameValue(accessed, false, 'accessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-7-1.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-7-1.js
new file mode 100644
index 0000000000..841d275bd8
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-7-1.js
@@ -0,0 +1,14 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce returns initialValue if 'length' is 0 and
+    initialValue is present (empty array)
+---*/
+
+function cb() {}
+assert.sameValue([].reduce(cb, 1), 1, '[].reduce(cb,1)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-7-10.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-7-10.js
new file mode 100644
index 0000000000..f21f2f1247
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-7-10.js
@@ -0,0 +1,13 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: Array.prototype.reduce - 'initialValue' is present
+---*/
+
+var str = "initialValue is present";
+
+assert.sameValue([].reduce(function() {}, str), str, '[].reduce(function () { }, str)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-7-11.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-7-11.js
new file mode 100644
index 0000000000..4e2a9f7495
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-7-11.js
@@ -0,0 +1,13 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: Array.prototype.reduce - 'initialValue' is not present
+---*/
+
+var str = "initialValue is not present";
+
+assert.sameValue([str].reduce(function() {}), str, '[str].reduce(function () { })');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-7-2.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-7-2.js
new file mode 100644
index 0000000000..6ecd4b1d9b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-7-2.js
@@ -0,0 +1,21 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce returns initialValue if 'length' is 0 and
+    initialValue is present (subclassed Array, length overridden to
+    null (type conversion))
+---*/
+
+foo.prototype = new Array(1, 2, 3);
+
+function foo() {}
+var f = new foo();
+f.length = null;
+
+function cb() {}
+assert.sameValue(f.reduce(cb, 1), 1, 'f.reduce(cb,1)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-7-3.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-7-3.js
new file mode 100644
index 0000000000..66e92ed670
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-7-3.js
@@ -0,0 +1,21 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce returns initialValue if 'length' is 0 and
+    initialValue is present (subclassed Array, length overridden to
+    false (type conversion))
+---*/
+
+foo.prototype = new Array(1, 2, 3);
+
+function foo() {}
+var f = new foo();
+f.length = false;
+
+function cb() {}
+assert.sameValue(f.reduce(cb, 1), 1, 'f.reduce(cb,1)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-7-4.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-7-4.js
new file mode 100644
index 0000000000..7100e153bd
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-7-4.js
@@ -0,0 +1,21 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce returns initialValue if 'length' is 0 and
+    initialValue is present (subclassed Array, length overridden to 0
+    (type conversion))
+---*/
+
+foo.prototype = new Array(1, 2, 3);
+
+function foo() {}
+var f = new foo();
+f.length = 0;
+
+function cb() {}
+assert.sameValue(f.reduce(cb, 1), 1, 'f.reduce(cb,1)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-7-5.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-7-5.js
new file mode 100644
index 0000000000..56027062b7
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-7-5.js
@@ -0,0 +1,21 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce returns initialValue if 'length' is 0 and
+    initialValue is present (subclassed Array, length overridden to
+    '0' (type conversion))
+---*/
+
+foo.prototype = new Array(1, 2, 3);
+
+function foo() {}
+var f = new foo();
+f.length = '0';
+
+function cb() {}
+assert.sameValue(f.reduce(cb, 1), 1, 'f.reduce(cb,1)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-7-6.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-7-6.js
new file mode 100644
index 0000000000..b70cb41afb
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-7-6.js
@@ -0,0 +1,27 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce returns initialValue if 'length' is 0 and
+    initialValue is present (subclassed Array, length overridden with
+    obj with valueOf)
+---*/
+
+foo.prototype = new Array(1, 2, 3);
+
+function foo() {}
+var f = new foo();
+
+var o = {
+  valueOf: function() {
+    return 0;
+  }
+};
+f.length = o;
+
+function cb() {}
+assert.sameValue(f.reduce(cb, 1), 1, 'f.reduce(cb,1)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-7-7.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-7-7.js
new file mode 100644
index 0000000000..4b97710d3b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-7-7.js
@@ -0,0 +1,33 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce returns initialValue if 'length' is 0 and
+    initialValue is present (subclassed Array, length overridden with
+    obj w/o valueOf (toString))
+---*/
+
+foo.prototype = new Array(1, 2, 3);
+
+function foo() {}
+var f = new foo();
+
+var o = {
+  toString: function() {
+    return '0';
+  }
+};
+f.length = o;
+
+// objects inherit the default valueOf method of the Object object;
+// that simply returns the itself. Since the default valueOf() method
+// does not return a primitive value, ES next tries to convert the object
+// to a number by calling its toString() method and converting the
+// resulting string to a number.
+
+function cb() {}
+assert.sameValue(f.reduce(cb, 1), 1, 'f.reduce(cb,1)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-7-8.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-7-8.js
new file mode 100644
index 0000000000..f9ca7bb91e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-7-8.js
@@ -0,0 +1,36 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce returns initialValue if 'length' is 0 and
+    initialValue is present (subclassed Array, length overridden with
+    [])
+---*/
+
+foo.prototype = new Array(1, 2, 3);
+
+function foo() {}
+var f = new foo();
+
+f.length = [];
+
+// objects inherit the default valueOf method of the Object object;
+// that simply returns the itself. Since the default valueOf() method
+// does not return a primitive value, ES next tries to convert the object
+// to a number by calling its toString() method and converting the
+// resulting string to a number.
+//
+// The toString( ) method on Array converts the array elements to strings,
+// then returns the result of concatenating these strings, with commas in
+// between. An array with no elements converts to the empty string, which
+// converts to the number 0. If an array has a single element that is a
+// number n, the array converts to a string representation of n, which is
+// then converted back to n itself. If an array contains more than one element,
+// or if its one element is not a number, the array converts to NaN.
+
+function cb() {}
+assert.sameValue(f.reduce(cb, 1), 1, 'f.reduce(cb,1)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-7-9.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-7-9.js
new file mode 100644
index 0000000000..4df53a76ec
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-7-9.js
@@ -0,0 +1,36 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce returns initialValue if 'length' is 0 and
+    initialValue is present (subclassed Array, length overridden with
+    [0])
+---*/
+
+foo.prototype = new Array(1, 2, 3);
+
+function foo() {}
+var f = new foo();
+
+f.length = [0];
+
+// objects inherit the default valueOf method of the Object object;
+// that simply returns the itself. Since the default valueOf() method
+// does not return a primitive value, ES next tries to convert the object
+// to a number by calling its toString() method and converting the
+// resulting string to a number.
+//
+// The toString( ) method on Array converts the array elements to strings,
+// then returns the result of concatenating these strings, with commas in
+// between. An array with no elements converts to the empty string, which
+// converts to the number 0. If an array has a single element that is a
+// number n, the array converts to a string representation of n, which is
+// then converted back to n itself. If an array contains more than one element,
+// or if its one element is not a number, the array converts to NaN.
+
+function cb() {}
+assert.sameValue(f.reduce(cb, 1), 1, 'f.reduce(cb,1)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-8-b-1.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-8-b-1.js
new file mode 100644
index 0000000000..7c1604fef4
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-8-b-1.js
@@ -0,0 +1,29 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: Array.prototype.reduce - no observable effects occur if 'len' is 0
+---*/
+
+var accessed = false;
+
+var obj = {
+  length: 0
+};
+
+Object.defineProperty(obj, "0", {
+  get: function() {
+    accessed = true;
+    return 10;
+  },
+  configurable: true
+});
+
+assert.throws(TypeError, function() {
+  Array.prototype.reduce.call(obj, function() {});
+});
+
+assert.sameValue(accessed, false, 'accessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-8-b-2.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-8-b-2.js
new file mode 100644
index 0000000000..f53cc471bd
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-8-b-2.js
@@ -0,0 +1,31 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - modifications to length don't change
+    number of iterations in step 9
+---*/
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  return idx;
+}
+
+var obj = {
+  3: 12,
+  4: 9,
+  length: 4
+};
+
+Object.defineProperty(obj, "2", {
+  get: function() {
+    obj.length = 10;
+    return 11;
+  },
+  configurable: true
+});
+
+assert.sameValue(Array.prototype.reduce.call(obj, callbackfn), 3, 'Array.prototype.reduce.call(obj, callbackfn)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-8-b-3.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-8-b-3.js
new file mode 100644
index 0000000000..c55ae70d3a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-8-b-3.js
@@ -0,0 +1,45 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: Array.prototype.reduce - loop is broken once 'kPresent' is true
+---*/
+
+var called = 0;
+var testResult = false;
+var firstCalled = 0;
+var secondCalled = 0;
+
+function callbackfn(prevVal, val, idx, obj) {
+  if (called === 0) {
+    testResult = (idx === 1);
+  }
+  called++;
+}
+
+var arr = [, , ];
+
+Object.defineProperty(arr, "0", {
+  get: function() {
+    firstCalled++;
+    return 11;
+  },
+  configurable: true
+});
+
+Object.defineProperty(arr, "1", {
+  get: function() {
+    secondCalled++;
+    return 9;
+  },
+  configurable: true
+});
+
+arr.reduce(callbackfn);
+
+assert(testResult, 'testResult !== true');
+assert.sameValue(firstCalled, 1, 'firstCalled');
+assert.sameValue(secondCalled, 1, 'secondCalled');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-8-b-ii-1.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-8-b-ii-1.js
new file mode 100644
index 0000000000..6bc328baf5
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-8-b-ii-1.js
@@ -0,0 +1,23 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - added properties in step 2 are visible
+    here
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "length", {
+  get: function() {
+    obj[1] = "accumulator";
+    return 3;
+  },
+  configurable: true
+});
+
+assert.sameValue(Array.prototype.reduce.call(obj, function() {}), "accumulator", 'Array.prototype.reduce.call(obj, function () { })');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-8-b-ii-2.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-8-b-ii-2.js
new file mode 100644
index 0000000000..735d8bf329
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-8-b-ii-2.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - deleted properties in step 2 are visible
+    here
+---*/
+
+var obj = {
+  1: "accumulator",
+  2: "another"
+};
+
+Object.defineProperty(obj, "length", {
+  get: function() {
+    delete obj[1];
+    return 3;
+  },
+  configurable: true
+});
+
+assert.notSameValue(Array.prototype.reduce.call(obj, function() {}), "accumulator", 'Array.prototype.reduce.call(obj, function () { })');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-8-b-iii-1-1.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-8-b-iii-1-1.js
new file mode 100644
index 0000000000..cc6bba40cd
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-8-b-iii-1-1.js
@@ -0,0 +1,29 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - element to be retrieved is own data
+    property on an Array-like object
+---*/
+
+var testResult = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx === 1) {
+    testResult = (prevVal === 0);
+  }
+}
+
+var obj = {
+  0: 0,
+  1: 1,
+  2: 2,
+  length: 2
+};
+Array.prototype.reduce.call(obj, callbackfn);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-8-b-iii-1-10.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-8-b-iii-1-10.js
new file mode 100644
index 0000000000..fab5c23ddf
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-8-b-iii-1-10.js
@@ -0,0 +1,32 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - when element to be retrieved is own
+    accessor property on an Array
+---*/
+
+var testResult = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx === 1) {
+    testResult = (prevVal === 0);
+  }
+}
+
+var arr = [, 1, 2];
+
+Object.defineProperty(arr, "0", {
+  get: function() {
+    return 0;
+  },
+  configurable: true
+});
+
+arr.reduce(callbackfn);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-8-b-iii-1-11.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-8-b-iii-1-11.js
new file mode 100644
index 0000000000..f56f6cb024
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-8-b-iii-1-11.js
@@ -0,0 +1,43 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - element to be retrieved is own accessor
+    property that overrides an inherited data property on an
+    Array-like object
+---*/
+
+var testResult = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx === 1) {
+    testResult = (prevVal === "9");
+  }
+}
+
+var proto = {
+  0: 0,
+  1: 1,
+  2: 2
+};
+
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+child.length = 3;
+
+Object.defineProperty(child, "0", {
+  get: function() {
+    return "9";
+  },
+  configurable: true
+});
+
+Array.prototype.reduce.call(child, callbackfn);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-8-b-iii-1-12.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-8-b-iii-1-12.js
new file mode 100644
index 0000000000..4e58b106d9
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-8-b-iii-1-12.js
@@ -0,0 +1,33 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - element to be retrieved is own accessor
+    property that overrides an inherited data property on an Array
+---*/
+
+var testResult = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx === 1) {
+    testResult = (prevVal === "9");
+  }
+}
+
+Array.prototype[0] = 0;
+var arr = [, 1, 2];
+
+Object.defineProperty(arr, "0", {
+  get: function() {
+    return "9";
+  },
+  configurable: true
+});
+
+arr.reduce(callbackfn);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-8-b-iii-1-13.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-8-b-iii-1-13.js
new file mode 100644
index 0000000000..928bdb2c49
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-8-b-iii-1-13.js
@@ -0,0 +1,49 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - element to be retrieved is own accessor
+    property that overrides an inherited accessor property on an
+    Array-like object
+---*/
+
+var testResult = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx === 1) {
+    testResult = (prevVal === "9");
+  }
+}
+
+var proto = {
+  1: 1,
+  2: 2
+};
+
+Object.defineProperty(proto, "0", {
+  get: function() {
+    return 0;
+  },
+  configurable: true
+});
+
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+child.length = 3;
+
+Object.defineProperty(child, "0", {
+  get: function() {
+    return "9";
+  },
+  configurable: true
+});
+
+Array.prototype.reduce.call(child, callbackfn);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-8-b-iii-1-14.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-8-b-iii-1-14.js
new file mode 100644
index 0000000000..11c3c24f5c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-8-b-iii-1-14.js
@@ -0,0 +1,38 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - element to be retrieved is own accessor
+    property that overrides an inherited accessor property on an Array
+---*/
+
+var testResult = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx === 1) {
+    testResult = (prevVal === "9");
+  }
+}
+
+Object.defineProperty(Array.prototype, "0", {
+  get: function() {
+    return 0;
+  },
+  configurable: true
+});
+
+var arr = [, 1, 2];
+Object.defineProperty(arr, "0", {
+  get: function() {
+    return "9";
+  },
+  configurable: true
+});
+
+arr.reduce(callbackfn);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-8-b-iii-1-15.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-8-b-iii-1-15.js
new file mode 100644
index 0000000000..3a4d3abc0c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-8-b-iii-1-15.js
@@ -0,0 +1,41 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - element to be retrieved is inherited
+    accessor property on an Array-like object
+---*/
+
+var testResult = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx === 1) {
+    testResult = (prevVal === 0);
+  }
+}
+
+var proto = {
+  1: 1,
+  2: 2
+};
+
+Object.defineProperty(proto, "0", {
+  get: function() {
+    return 0;
+  },
+  configurable: true
+});
+
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+child.length = 3;
+
+Array.prototype.reduce.call(child, callbackfn);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-8-b-iii-1-16.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-8-b-iii-1-16.js
new file mode 100644
index 0000000000..8d5a927e5c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-8-b-iii-1-16.js
@@ -0,0 +1,32 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - element to be retrieved is inherited
+    accessor property on an Array
+---*/
+
+var testResult = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx === 1) {
+    testResult = (prevVal === 0);
+  }
+}
+
+Object.defineProperty(Array.prototype, "0", {
+  get: function() {
+    return 0;
+  },
+  configurable: true
+});
+
+var arr = [, 1, 2];
+
+arr.reduce(callbackfn);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-8-b-iii-1-17.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-8-b-iii-1-17.js
new file mode 100644
index 0000000000..7317cde753
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-8-b-iii-1-17.js
@@ -0,0 +1,34 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - element to be retrieved is own accessor
+    property without a get function on an Array-like object
+---*/
+
+var testResult = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx === 1) {
+    testResult = (prevVal === undefined);
+  }
+}
+
+var obj = {
+  1: 1,
+  2: 2,
+  length: 3
+};
+
+Object.defineProperty(obj, "0", {
+  set: function() {},
+  configurable: true
+});
+
+Array.prototype.reduce.call(obj, callbackfn);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-8-b-iii-1-18.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-8-b-iii-1-18.js
new file mode 100644
index 0000000000..ed6be4721b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-8-b-iii-1-18.js
@@ -0,0 +1,30 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - element to be retrieved is own accessor
+    property without a get function on an Array
+---*/
+
+var testResult = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx === 1) {
+    testResult = (prevVal === undefined);
+  }
+}
+
+var arr = [, 1, 2];
+
+Object.defineProperty(arr, "0", {
+  set: function() {},
+  configurable: true
+});
+
+arr.reduce(callbackfn);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-8-b-iii-1-19.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-8-b-iii-1-19.js
new file mode 100644
index 0000000000..d9182b778d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-8-b-iii-1-19.js
@@ -0,0 +1,37 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - element to be retrieved is own accessor
+    property without a get function that overrides an inherited
+    accessor property on an Array-like object
+---*/
+
+var testResult = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx === 1) {
+    testResult = (prevVal === undefined);
+  }
+}
+
+Object.prototype[0] = 0;
+
+var obj = {
+  1: 1,
+  2: 2,
+  length: 3
+};
+
+Object.defineProperty(obj, "0", {
+  set: function() {},
+  configurable: true
+});
+
+Array.prototype.reduce.call(obj, callbackfn);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-8-b-iii-1-2.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-8-b-iii-1-2.js
new file mode 100644
index 0000000000..f2ccbd2b59
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-8-b-iii-1-2.js
@@ -0,0 +1,24 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - element to be retrieved is own data
+    property on an Array
+---*/
+
+var testResult = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx === 1) {
+    testResult = (prevVal === 0);
+  }
+}
+
+var arr = [0, 1, 2];
+arr.reduce(callbackfn);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-8-b-iii-1-20.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-8-b-iii-1-20.js
new file mode 100644
index 0000000000..03786c37da
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-8-b-iii-1-20.js
@@ -0,0 +1,31 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - element to be retrieved is own accessor
+    property without a get function that overrides an inherited
+    accessor property on an Array
+---*/
+
+var testResult = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx === 1) {
+    testResult = (prevVal === undefined);
+  }
+}
+
+Array.prototype[0] = 0;
+var arr = [, 1, 2];
+Object.defineProperty(arr, "0", {
+  set: function() {},
+  configurable: true
+});
+
+arr.reduce(callbackfn);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-8-b-iii-1-21.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-8-b-iii-1-21.js
new file mode 100644
index 0000000000..a28aa9ded6
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-8-b-iii-1-21.js
@@ -0,0 +1,39 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - element to be retrieved is inherited
+    accessor property without a get function on an Array-like object
+---*/
+
+var testResult = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx === 1) {
+    testResult = (prevVal === undefined);
+  }
+}
+
+var proto = {
+  1: 1,
+  2: 2
+};
+
+Object.defineProperty(proto, "0", {
+  set: function() {},
+  configurable: true
+});
+
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+child.length = 3;
+
+Array.prototype.reduce.call(child, callbackfn);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-8-b-iii-1-22.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-8-b-iii-1-22.js
new file mode 100644
index 0000000000..9ab02ad487
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-8-b-iii-1-22.js
@@ -0,0 +1,30 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - element to be retrieved is inherited
+    accessor property without a get function on an Array
+---*/
+
+var testResult = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx === 1) {
+    testResult = (prevVal === undefined);
+  }
+}
+
+Object.defineProperty(Array.prototype, "0", {
+  set: function() {},
+  configurable: true
+});
+
+var arr = [, 1, 2];
+
+arr.reduce(callbackfn);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-8-b-iii-1-25.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-8-b-iii-1-25.js
new file mode 100644
index 0000000000..fc0c264a5c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-8-b-iii-1-25.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - This object is the Arguments object which
+    implements its own property get method (number of arguments is
+    less than number of parameters)
+---*/
+
+var testResult = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx === 1) {
+    testResult = (prevVal === 0);
+  }
+}
+
+var func = function(a, b, c) {
+  Array.prototype.reduce.call(arguments, callbackfn);
+};
+
+func(0, 1);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-8-b-iii-1-26.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-8-b-iii-1-26.js
new file mode 100644
index 0000000000..13645e0c23
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-8-b-iii-1-26.js
@@ -0,0 +1,29 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - This object is the Arguments object which
+    implements its own property get method (number of arguments equals
+    number of parameters)
+---*/
+
+var testResult = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx === 2) {
+    testResult = (prevVal === 1);
+  }
+}
+
+var func = function(a, b, c) {
+  delete arguments[0];
+  Array.prototype.reduce.call(arguments, callbackfn);
+};
+
+func(0, 1, 2);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-8-b-iii-1-27.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-8-b-iii-1-27.js
new file mode 100644
index 0000000000..2a674e5e2a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-8-b-iii-1-27.js
@@ -0,0 +1,30 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - This object is the Arguments object which
+    implements its own property get method (number of arguments is
+    greater than number of parameters)
+---*/
+
+var testResult = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx === 3) {
+    testResult = (prevVal === 2);
+  }
+}
+
+var func = function(a, b, c) {
+  delete arguments[0];
+  delete arguments[1];
+  Array.prototype.reduce.call(arguments, callbackfn);
+};
+
+func(0, 1, 2, 3);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-8-b-iii-1-28.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-8-b-iii-1-28.js
new file mode 100644
index 0000000000..3cdea44286
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-8-b-iii-1-28.js
@@ -0,0 +1,24 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - applied to String object, which
+    implements its own property get method
+---*/
+
+var testResult = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx === 1) {
+    testResult = (prevVal === "0");
+  }
+}
+
+var str = new String("012");
+Array.prototype.reduce.call(str, callbackfn);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-8-b-iii-1-29.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-8-b-iii-1-29.js
new file mode 100644
index 0000000000..6b4b9ccf9c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-8-b-iii-1-29.js
@@ -0,0 +1,31 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - applied to Function object which
+    implements its own property get method
+---*/
+
+var testResult = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx === 1) {
+    testResult = (prevVal === 0);
+  }
+}
+
+var obj = function(a, b, c) {
+  return a + b + c;
+};
+obj[0] = 0;
+obj[1] = 1;
+obj[2] = 2;
+obj[3] = 3;
+
+Array.prototype.reduce.call(obj, callbackfn);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-8-b-iii-1-3.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-8-b-iii-1-3.js
new file mode 100644
index 0000000000..4250f525c7
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-8-b-iii-1-3.js
@@ -0,0 +1,38 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - element to be retrieved is own data
+    property that overrides an inherited data property on an
+    Array-like object
+---*/
+
+var testResult = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx === 1) {
+    testResult = (prevVal === "9");
+  }
+}
+
+var proto = {
+  0: 0,
+  1: 1,
+  2: 2,
+  length: 3
+};
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+child[0] = "9";
+child[1] = "1";
+child.length = 3;
+
+Array.prototype.reduce.call(child, callbackfn);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-8-b-iii-1-30.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-8-b-iii-1-30.js
new file mode 100644
index 0000000000..901d503f04
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-8-b-iii-1-30.js
@@ -0,0 +1,45 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - element changed by getter on current
+    iterations is observed in subsequent iterations on an Array
+---*/
+
+var testResult = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx === 1) {
+    testResult = (curVal === 1);
+  }
+}
+
+var arr = [, , 2];
+var preIterVisible = false;
+
+Object.defineProperty(arr, "0", {
+  get: function() {
+    preIterVisible = true;
+    return 0;
+  },
+  configurable: true
+});
+
+Object.defineProperty(arr, "1", {
+  get: function() {
+    if (preIterVisible) {
+      return 1;
+    } else {
+      return 100;
+    }
+  },
+  configurable: true
+});
+
+arr.reduce(callbackfn);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-8-b-iii-1-31.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-8-b-iii-1-31.js
new file mode 100644
index 0000000000..acf21c758a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-8-b-iii-1-31.js
@@ -0,0 +1,48 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - element changed by getter on current
+    iterations is observed in subsequent iterations on an Array-like
+    object
+---*/
+
+var testResult = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx === 1) {
+    testResult = (curVal === 1);
+  }
+}
+
+var obj = {
+  length: 2
+};
+var preIterVisible = false;
+
+Object.defineProperty(obj, "0", {
+  get: function() {
+    preIterVisible = true;
+    return 0;
+  },
+  configurable: true
+});
+
+Object.defineProperty(obj, "1", {
+  get: function() {
+    if (preIterVisible) {
+      return 1;
+    } else {
+      return 100;
+    }
+  },
+  configurable: true
+});
+
+Array.prototype.reduce.call(obj, callbackfn);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-8-b-iii-1-32.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-8-b-iii-1-32.js
new file mode 100644
index 0000000000..683b42c417
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-8-b-iii-1-32.js
@@ -0,0 +1,38 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - exception in getter terminates iteration
+    on an Array-like object
+---*/
+
+var accessed = false;
+var testResult = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx >= 1) {
+    accessed = true;
+    testResult = (prevVal === 0);
+  }
+}
+
+var obj = {
+  2: 2,
+  1: 1,
+  length: 3
+};
+Object.defineProperty(obj, "0", {
+  get: function() {
+    throw new RangeError("unhandle exception happened in getter");
+  },
+  configurable: true
+});
+assert.throws(RangeError, function() {
+  Array.prototype.reduce.call(obj, callbackfn);
+});
+assert.sameValue(accessed, false, 'accessed');
+assert.sameValue(testResult, false, 'testResult');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-8-b-iii-1-33.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-8-b-iii-1-33.js
new file mode 100644
index 0000000000..bdb2286cd6
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-8-b-iii-1-33.js
@@ -0,0 +1,35 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - exception in getter terminates iteration
+    on an Array
+---*/
+
+var accessed = false;
+var testResult = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx >= 1) {
+    accessed = true;
+    testResult = (prevVal === 0);
+  }
+}
+
+var arr = [, 1, 2];
+
+Object.defineProperty(arr, "0", {
+  get: function() {
+    throw new RangeError("unhandle exception happened in getter");
+  },
+  configurable: true
+});
+assert.throws(RangeError, function() {
+  arr.reduce(callbackfn);
+});
+assert.sameValue(accessed, false, 'accessed');
+assert.sameValue(testResult, false, 'testResult');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-8-b-iii-1-4.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-8-b-iii-1-4.js
new file mode 100644
index 0000000000..43dc373a3d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-8-b-iii-1-4.js
@@ -0,0 +1,24 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - element to be retrieved is own data
+    property that overrides an inherited data property on an Array
+---*/
+
+var testResult = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx === 1) {
+    testResult = (prevVal === 0);
+  }
+}
+
+Array.prototype[0] = "9";
+[0, 1, 2].reduce(callbackfn);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-8-b-iii-1-5.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-8-b-iii-1-5.js
new file mode 100644
index 0000000000..d14d46865c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-8-b-iii-1-5.js
@@ -0,0 +1,44 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - element to be retrieved is own data
+    property that overrides an inherited accessor property on an
+    Array-like object
+---*/
+
+var testResult = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx === 1) {
+    testResult = (prevVal === "9");
+  }
+}
+
+var proto = {};
+
+Object.defineProperty(proto, "0", {
+  get: function() {
+    return 0;
+  },
+  configurable: true
+});
+
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+child.length = 2;
+Object.defineProperty(child, "0", {
+  value: "9",
+  configurable: true
+});
+child[1] = "1";
+
+Array.prototype.reduce.call(child, callbackfn);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-8-b-iii-1-6.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-8-b-iii-1-6.js
new file mode 100644
index 0000000000..7ee7621226
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-8-b-iii-1-6.js
@@ -0,0 +1,30 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - element to be retrieved is own data
+    property that overrides an inherited accessor property on an Array
+---*/
+
+var testResult = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx === 1) {
+    testResult = (prevVal === 0);
+  }
+}
+
+Object.defineProperty(Array.prototype, "0", {
+  get: function() {
+    return "5";
+  },
+  configurable: true
+});
+
+[0, 1, 2].reduce(callbackfn);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-8-b-iii-1-7.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-8-b-iii-1-7.js
new file mode 100644
index 0000000000..2ec2ee0b38
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-8-b-iii-1-7.js
@@ -0,0 +1,35 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - element to be retrieved is inherited data
+    property on an Array-like object
+---*/
+
+var testResult = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx === 1) {
+    testResult = (prevVal === 0);
+  }
+}
+
+var proto = {
+  0: 0,
+  1: 1,
+  2: 2,
+  length: 3
+};
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+child.length = 3;
+
+Array.prototype.reduce.call(child, callbackfn);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-8-b-iii-1-8.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-8-b-iii-1-8.js
new file mode 100644
index 0000000000..af606108f7
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-8-b-iii-1-8.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - element to be retrieved is inherited data
+    property on an Array
+---*/
+
+var testResult = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx === 1) {
+    testResult = (prevVal === 0);
+  }
+}
+
+Array.prototype[0] = 0;
+Array.prototype[1] = 1;
+Array.prototype[2] = 2;
+[, , , ].reduce(callbackfn);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-8-b-iii-1-9.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-8-b-iii-1-9.js
new file mode 100644
index 0000000000..1fd31f3566
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-8-b-iii-1-9.js
@@ -0,0 +1,35 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - element to be retrieved is own accessor
+    property on an Array-like object
+---*/
+
+var testResult = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx === 1) {
+    testResult = (prevVal === 0);
+  }
+}
+
+var obj = {
+  1: 1,
+  2: 2,
+  length: 3
+};
+Object.defineProperty(obj, "0", {
+  get: function() {
+    return 0;
+  },
+  configurable: true
+});
+
+Array.prototype.reduce.call(obj, callbackfn);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-8-c-1.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-8-c-1.js
new file mode 100644
index 0000000000..0fced6464d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-8-c-1.js
@@ -0,0 +1,19 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce throws TypeError when Array is empty and
+    initialValue is not present
+---*/
+
+function callbackfn(prevVal, curVal, idx, obj)
+{}
+
+var arr = new Array(10);
+assert.throws(TypeError, function() {
+  arr.reduce(callbackfn);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-8-c-2.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-8-c-2.js
new file mode 100644
index 0000000000..f16665bf36
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-8-c-2.js
@@ -0,0 +1,22 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce throws TypeError when elements assigned
+    values are deleted by reducing array length and initialValue is
+    not present
+---*/
+
+function callbackfn(prevVal, curVal, idx, obj)
+{}
+
+var arr = new Array(10);
+arr[9] = 1;
+arr.length = 5;
+assert.throws(TypeError, function() {
+  arr.reduce(callbackfn);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-8-c-3.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-8-c-3.js
new file mode 100644
index 0000000000..e112cf748e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-8-c-3.js
@@ -0,0 +1,24 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce throws TypeError when elements assigned
+    values are deleted and initialValue is not present
+---*/
+
+function callbackfn(prevVal, curVal, idx, obj)
+{}
+
+var arr = [1, 2, 3, 4, 5];
+delete arr[0];
+delete arr[1];
+delete arr[2];
+delete arr[3];
+delete arr[4];
+assert.throws(TypeError, function() {
+  arr.reduce(callbackfn);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-8-c-4.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-8-c-4.js
new file mode 100644
index 0000000000..432919dc10
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-8-c-4.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce doesn't throw error when array has no own
+    properties but prototype contains a single property
+---*/
+
+var arr = [, , , ];
+
+try {
+  Array.prototype[1] = "prototype";
+  arr.reduce(function() {});
+} finally {
+  delete Array.prototype[1];
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-8-c-5.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-8-c-5.js
new file mode 100644
index 0000000000..a45a73094b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-8-c-5.js
@@ -0,0 +1,27 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - if exception occurs, it occurs after any
+    side-effects that might be produced by step 2
+---*/
+
+var obj = {};
+
+var accessed = false;
+
+Object.defineProperty(obj, "length", {
+  get: function() {
+    accessed = true;
+    return 2;
+  },
+  configurable: true
+});
+assert.throws(TypeError, function() {
+  Array.prototype.reduce.call(obj, function() {});
+});
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-8-c-6.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-8-c-6.js
new file mode 100644
index 0000000000..446552144b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-8-c-6.js
@@ -0,0 +1,31 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - if exception occurs, it occurs after any
+    side-effects that might be produced by step 3
+---*/
+
+var obj = {};
+
+var accessed = false;
+
+Object.defineProperty(obj, "length", {
+  get: function() {
+    return {
+      toString: function() {
+        accessed = true;
+        return "2";
+      }
+    };
+  },
+  configurable: true
+});
+assert.throws(TypeError, function() {
+  Array.prototype.reduce.call(obj, function() {});
+});
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-8-c-7.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-8-c-7.js
new file mode 100644
index 0000000000..4716787468
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-8-c-7.js
@@ -0,0 +1,24 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - the exception is not thrown if exception
+    was thrown by step 2
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "length", {
+  get: function() {
+    throw new Test262Error();
+  },
+  configurable: true
+});
+
+assert.throws(Test262Error, function() {
+  Array.prototype.reduce.call(obj, function() {});
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-8-c-8.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-8-c-8.js
new file mode 100644
index 0000000000..15d23e11b9
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-8-c-8.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - the exception is not thrown if exception
+    was thrown by step 3
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "length", {
+  get: function() {
+    return {
+      toString: function() {
+        throw new Test262Error();
+      }
+    };
+  },
+  configurable: true
+});
+
+assert.throws(Test262Error, function() {
+  Array.prototype.reduce.call(obj, function() {});
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-1.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-1.js
new file mode 100644
index 0000000000..3e8387e96a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-1.js
@@ -0,0 +1,21 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce doesn't consider new elements added to
+    array after it is called
+---*/
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  arr[5] = 6;
+  arr[2] = 3;
+  return prevVal + curVal;
+}
+
+var arr = [1, 2, , 4, '5'];
+
+assert.sameValue(arr.reduce(callbackfn), "105", 'arr.reduce(callbackfn)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-10.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-10.js
new file mode 100644
index 0000000000..d9b5928953
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-10.js
@@ -0,0 +1,21 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce called with an initial value doesn't
+    consider new elements added to array after it is called
+---*/
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  arr[5] = 6;
+  arr[2] = 3;
+  return prevVal + curVal;
+}
+
+var arr = [1, 2, , 4, '5'];
+
+assert.sameValue(arr.reduce(callbackfn, ""), "12345", 'arr.reduce(callbackfn, "")');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-2.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-2.js
new file mode 100644
index 0000000000..ae74f029a7
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-2.js
@@ -0,0 +1,22 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce considers new value of elements in array
+    after it is called
+---*/
+
+function callbackfn(prevVal, curVal, idx, obj)
+{
+  arr[3] = -2;
+  arr[4] = -1;
+  return prevVal + curVal;
+}
+
+var arr = [1, 2, 3, 4, 5];
+
+assert.sameValue(arr.reduce(callbackfn), 3, 'arr.reduce(callbackfn)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-3.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-3.js
new file mode 100644
index 0000000000..d83ac8f89d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-3.js
@@ -0,0 +1,23 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce doesn't visit deleted elements in array
+    after the call
+---*/
+
+function callbackfn(prevVal, curVal, idx, obj)
+{
+  delete arr[3];
+  delete arr[4];
+  return prevVal + curVal;
+}
+
+var arr = ['1', 2, 3, 4, 5];
+
+// two elements deleted
+assert.sameValue(arr.reduce(callbackfn), "123", 'arr.reduce(callbackfn)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-4.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-4.js
new file mode 100644
index 0000000000..3a3e10d2df
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-4.js
@@ -0,0 +1,21 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce doesn't visit deleted elements when
+    Array.length is decreased
+---*/
+
+function callbackfn(prevVal, curVal, idx, obj)
+{
+  arr.length = 2;
+  return prevVal + curVal;
+}
+
+var arr = [1, 2, 3, 4, 5];
+
+assert.sameValue(arr.reduce(callbackfn), 3, 'arr.reduce(callbackfn)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-5.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-5.js
new file mode 100644
index 0000000000..20255d50cd
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-5.js
@@ -0,0 +1,24 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - callbackfn not called for array with one
+    element
+---*/
+
+var callCnt = 0;
+
+function callbackfn(prevVal, curVal, idx, obj)
+{
+  callCnt++;
+  return 2;
+}
+
+var arr = [1];
+
+assert.sameValue(arr.reduce(callbackfn), 1, 'arr.reduce(callbackfn)');
+assert.sameValue(callCnt, 0, 'callCnt');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-6.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-6.js
new file mode 100644
index 0000000000..635d08b6e5
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-6.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce visits deleted element in array after the
+    call when same index is also present in prototype
+---*/
+
+function callbackfn(prevVal, curVal, idx, obj)
+{
+  delete arr[3];
+  delete arr[4];
+  return prevVal + curVal;
+}
+
+Array.prototype[4] = 5;
+var arr = ['1', 2, 3, 4, 5];
+var res = arr.reduce(callbackfn);
+delete Array.prototype[4];
+
+//one element acually deleted
+assert.sameValue(res, "1235", 'res');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-7.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-7.js
new file mode 100644
index 0000000000..658bc8a8bc
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-7.js
@@ -0,0 +1,22 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce stops calling callbackfn once the array is
+    deleted during the call
+---*/
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  delete o.arr;
+  return prevVal + curVal;
+}
+
+var o = new Object();
+o.arr = ['1', 2, 3, 4, 5];
+
+assert.sameValue(o.arr.reduce(callbackfn), "12345", 'o.arr.reduce(callbackfn)');
+assert.sameValue(o.hasOwnProperty("arr"), false, 'o.hasOwnProperty("arr")');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-8.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-8.js
new file mode 100644
index 0000000000..bfee2b4417
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-8.js
@@ -0,0 +1,33 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: Array.prototype.reduce - no observable effects occur if 'len' is 0
+---*/
+
+var accessed = false;
+var callbackAccessed = false;
+
+function callbackfn() {
+  callbackAccessed = true;
+}
+
+var obj = {
+  length: 0
+};
+
+Object.defineProperty(obj, "0", {
+  get: function() {
+    accessed = true;
+    return 10;
+  },
+  configurable: true
+});
+
+Array.prototype.reduce.call(obj, callbackfn, "initialValue");
+
+assert.sameValue(accessed, false, 'accessed');
+assert.sameValue(callbackAccessed, false, 'callbackAccessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-9.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-9.js
new file mode 100644
index 0000000000..9d6ce4d023
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-9.js
@@ -0,0 +1,32 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - modifications to length don't change
+    number of iterations in step 9
+---*/
+
+var called = 0;
+
+function callbackfn(accum, val, idx, obj) {
+  called++;
+  return accum + val;
+}
+
+var arr = [0, 1, 2, 3];
+Object.defineProperty(arr, "0", {
+  get: function() {
+    arr.length = 2;
+    return 0;
+  },
+  configurable: true
+});
+
+var newAccum = arr.reduce(callbackfn, "initialValue");
+
+assert.sameValue(newAccum, "initialValue01", 'newAccum');
+assert.sameValue(called, 2, 'called');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-b-1.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-b-1.js
new file mode 100644
index 0000000000..44157ae461
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-b-1.js
@@ -0,0 +1,18 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce returns initialvalue when Array is empty
+    and initialValue is present
+---*/
+
+function callbackfn(prevVal, curVal, idx, obj)
+{}
+
+var arr = new Array(10);
+
+assert.sameValue(arr.reduce(callbackfn, 5), 5, 'arr.reduce(callbackfn,5)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-b-10.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-b-10.js
new file mode 100644
index 0000000000..60a6f7769a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-b-10.js
@@ -0,0 +1,41 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - deleting property of prototype in step 8
+    causes deleted index property not to be visited on an Array-like
+    Object
+---*/
+
+var accessed = false;
+var testResult = true;
+
+function callbackfn(accum, val, idx, obj) {
+  accessed = true;
+  if (idx === 3) {
+    testResult = false;
+  }
+}
+
+var obj = {
+  2: 2,
+  length: 20
+};
+
+Object.defineProperty(obj, "0", {
+  get: function() {
+    delete Object.prototype[3];
+    return 0;
+  },
+  configurable: true
+});
+
+Object.prototype[3] = 1;
+Array.prototype.reduce.call(obj, callbackfn);
+
+assert(testResult, 'testResult !== true');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-b-11.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-b-11.js
new file mode 100644
index 0000000000..b156e88812
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-b-11.js
@@ -0,0 +1,36 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - deleting property of prototype in step 8
+    causes deleted index property not to be visited on an Array
+---*/
+
+var accessed = false;
+var testResult = true;
+
+function callbackfn(accum, val, idx, obj) {
+  accessed = true;
+  if (idx === 1) {
+    testResult = false;
+  }
+}
+
+var arr = [, , , 3];
+Object.defineProperty(arr, "0", {
+  get: function() {
+    delete Array.prototype[1];
+    return 0;
+  },
+  configurable: true
+});
+
+Array.prototype[1] = 1;
+arr.reduce(callbackfn);
+
+assert(testResult, 'testResult !== true');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-b-12.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-b-12.js
new file mode 100644
index 0000000000..e3e9450048
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-b-12.js
@@ -0,0 +1,40 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - deleting own property with prototype
+    property in step 8 causes prototype index property to be visited
+    on an Array-like object
+---*/
+
+var testResult = false;
+
+function callbackfn(accum, val, idx, obj) {
+  if (idx === 1 && val === 1) {
+    testResult = true;
+  }
+}
+
+var obj = {
+  0: 0,
+  1: 111,
+  4: 10,
+  length: 10
+};
+
+Object.defineProperty(obj, "0", {
+  get: function() {
+    delete obj[1];
+    return 0;
+  },
+  configurable: true
+});
+
+Object.prototype[1] = 1;
+Array.prototype.reduce.call(obj, callbackfn);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-b-13.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-b-13.js
new file mode 100644
index 0000000000..a5d1456e2f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-b-13.js
@@ -0,0 +1,34 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - deleting own property with prototype
+    property in step 8 causes prototype index property to be visited
+    on an Array
+---*/
+
+var testResult = false;
+
+function callbackfn(accum, val, idx, obj) {
+  if (idx === 1 && val === 1) {
+    testResult = true;
+  }
+}
+var arr = [0, 111];
+
+Object.defineProperty(arr, "0", {
+  get: function() {
+    delete arr[1];
+    return 0;
+  },
+  configurable: true
+});
+
+Array.prototype[1] = 1;
+arr.reduce(callbackfn);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-b-14.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-b-14.js
new file mode 100644
index 0000000000..edbd8ad8b9
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-b-14.js
@@ -0,0 +1,36 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - decreasing length of array in step 8
+    causes deleted index property not to be visited
+---*/
+
+var accessed = false;
+var testResult = true;
+
+function callbackfn(accum, val, idx, obj) {
+  accessed = true;
+  if (idx === 2) {
+    testResult = false;
+  }
+}
+
+var arr = [0, 1, 2, 3];
+
+Object.defineProperty(arr, "0", {
+  get: function() {
+    arr.length = 2;
+    return 0;
+  },
+  configurable: true
+});
+
+arr.reduce(callbackfn);
+
+assert(testResult, 'testResult !== true');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-b-15.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-b-15.js
new file mode 100644
index 0000000000..c34e872187
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-b-15.js
@@ -0,0 +1,39 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - decreasing length of array with prototype
+    property in step 8 causes prototype index property to be visited
+---*/
+
+var testResult = false;
+
+function callbackfn(accum, val, idx, obj) {
+  if (idx === 2 && val === "prototype") {
+    testResult = true;
+  }
+}
+var arr = [0, 1, 2, 3];
+
+Object.defineProperty(Array.prototype, "2", {
+  get: function() {
+    return "prototype";
+  },
+  configurable: true
+});
+
+Object.defineProperty(arr, "0", {
+  get: function() {
+    arr.length = 2;
+    return 1;
+  },
+  configurable: true
+});
+
+arr.reduce(callbackfn);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-b-16.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-b-16.js
new file mode 100644
index 0000000000..ec284d7ce6
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-b-16.js
@@ -0,0 +1,41 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - decreasing length of array in step 8 does
+    not delete non-configurable properties
+flags: [noStrict]
+---*/
+
+var testResult = false;
+
+function callbackfn(accum, val, idx, obj) {
+  if (idx === 2 && val === "unconfigurable") {
+    testResult = true;
+  }
+}
+
+var arr = [0, 1, 2, 3];
+
+Object.defineProperty(arr, "2", {
+  get: function() {
+    return "unconfigurable";
+  },
+  configurable: false
+});
+
+Object.defineProperty(arr, "0", {
+  get: function() {
+    arr.length = 2;
+    return 1;
+  },
+  configurable: true
+});
+
+arr.reduce(callbackfn);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-b-17.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-b-17.js
new file mode 100644
index 0000000000..a498629a11
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-b-17.js
@@ -0,0 +1,40 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - properties added into own object are
+    visited on an Array-like object
+---*/
+
+var testResult = false;
+
+function callbackfn(accum, val, idx, obj) {
+  if (idx === 3 && val === 3) {
+    testResult = true;
+  }
+}
+
+var obj = {
+  length: 5
+};
+
+Object.defineProperty(obj, "1", {
+  get: function() {
+    Object.defineProperty(obj, "3", {
+      get: function() {
+        return 3;
+      },
+      configurable: true
+    });
+    return 1;
+  },
+  configurable: true
+});
+
+Array.prototype.reduce.call(obj, callbackfn, "initialValue");
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-b-18.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-b-18.js
new file mode 100644
index 0000000000..3071d8509d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-b-18.js
@@ -0,0 +1,38 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - properties added into own object are
+    visited on an Array
+---*/
+
+var testResult = false;
+
+function callbackfn(accum, val, idx, obj) {
+  if (idx === 1 && val === 1) {
+    testResult = true;
+  }
+}
+
+var arr = [0, , 2];
+
+Object.defineProperty(arr, "0", {
+  get: function() {
+    Object.defineProperty(arr, "1", {
+      get: function() {
+        return 1;
+      },
+      configurable: true
+    });
+    return 0;
+  },
+  configurable: true
+});
+
+arr.reduce(callbackfn, "initialValue");
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-b-19.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-b-19.js
new file mode 100644
index 0000000000..3fc99ff400
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-b-19.js
@@ -0,0 +1,40 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - properties added to prototype are visited
+    on an Array-like object
+---*/
+
+var testResult = false;
+
+function callbackfn(accum, val, idx, obj) {
+  if (idx === 1 && val === 6.99) {
+    testResult = true;
+  }
+}
+
+var obj = {
+  length: 6
+};
+
+Object.defineProperty(obj, "0", {
+  get: function() {
+    Object.defineProperty(Object.prototype, "1", {
+      get: function() {
+        return 6.99;
+      },
+      configurable: true
+    });
+    return 0;
+  },
+  configurable: true
+});
+
+Array.prototype.reduce.call(obj, callbackfn, "initialValue");
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-b-2.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-b-2.js
new file mode 100644
index 0000000000..2d19d3bb2f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-b-2.js
@@ -0,0 +1,33 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - added properties in step 2 are visible
+    here
+---*/
+
+var testResult = false;
+
+function callbackfn(accum, val, idx, obj) {
+  if (idx === 2 && val === "2") {
+    testResult = true;
+  }
+}
+
+var obj = {};
+
+Object.defineProperty(obj, "length", {
+  get: function() {
+    obj[2] = "2";
+    return 3;
+  },
+  configurable: true
+});
+
+Array.prototype.reduce.call(obj, callbackfn, "initialValue");
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-b-20.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-b-20.js
new file mode 100644
index 0000000000..11593423e1
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-b-20.js
@@ -0,0 +1,38 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - properties can be added to prototype are
+    visited on an Array
+---*/
+
+var testResult = false;
+
+function callbackfn(accum, val, idx, obj) {
+  if (idx === 1 && val === 6.99) {
+    testResult = true;
+  }
+}
+
+var arr = [0, , 2];
+
+Object.defineProperty(arr, "0", {
+  get: function() {
+    Object.defineProperty(Array.prototype, "1", {
+      get: function() {
+        return 6.99;
+      },
+      configurable: true
+    });
+    return 0;
+  },
+  configurable: true
+});
+
+arr.reduce(callbackfn, "initialValue");
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-b-21.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-b-21.js
new file mode 100644
index 0000000000..42099d8cad
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-b-21.js
@@ -0,0 +1,46 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - deleting own property causes deleted
+    index property not to be visited on an Array-like object
+---*/
+
+var accessed = false;
+var testResult = true;
+
+function callbackfn(accum, val, idx, obj) {
+  accessed = true;
+  if (idx === 1) {
+    testResult = false;
+  }
+}
+
+var obj = {
+  5: 10,
+  length: 10
+};
+
+Object.defineProperty(obj, "1", {
+  get: function() {
+    return 6.99;
+  },
+  configurable: true
+});
+
+Object.defineProperty(obj, "0", {
+  get: function() {
+    delete obj[1];
+    return 0;
+  },
+  configurable: true
+});
+
+Array.prototype.reduce.call(obj, callbackfn, "initialValue");
+
+assert(testResult, 'testResult !== true');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-b-22.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-b-22.js
new file mode 100644
index 0000000000..7967244ed9
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-b-22.js
@@ -0,0 +1,43 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - deleting own property causes deleted
+    index property not to be visited on an Array
+---*/
+
+var accessed = false;
+var testResult = true;
+
+function callbackfn(accum, val, idx, obj) {
+  accessed = true;
+  if (idx === 1) {
+    testResult = false;
+  }
+}
+
+var arr = [1, 2, 4];
+
+Object.defineProperty(arr, "1", {
+  get: function() {
+    return "6.99";
+  },
+  configurable: true
+});
+
+Object.defineProperty(arr, "0", {
+  get: function() {
+    delete arr[1];
+    return 0;
+  },
+  configurable: true
+});
+
+arr.reduce(callbackfn, "initialValue");
+
+assert(testResult, 'testResult !== true');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-b-23.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-b-23.js
new file mode 100644
index 0000000000..2bff04ecb3
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-b-23.js
@@ -0,0 +1,40 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - deleting property of prototype causes
+    deleted index property not to be visited on an Array-like Object
+---*/
+
+var accessed = false;
+var testResult = true;
+
+function callbackfn(accum, val, idx, obj) {
+  accessed = true;
+  if (idx === 3) {
+    testResult = false;
+  }
+}
+
+var obj = {
+  2: 2,
+  length: 20
+};
+
+Object.defineProperty(obj, "0", {
+  get: function() {
+    delete Object.prototype[3];
+    return 0;
+  },
+  configurable: true
+});
+
+Object.prototype[3] = 1;
+Array.prototype.reduce.call(obj, callbackfn, "initialValue");
+
+assert(testResult, 'testResult !== true');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-b-24.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-b-24.js
new file mode 100644
index 0000000000..8c6f24ae3c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-b-24.js
@@ -0,0 +1,36 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - deleting property of prototype causes
+    deleted index property not to be visited on an Array
+---*/
+
+var accessed = false;
+var testResult = true;
+
+function callbackfn(accum, val, idx, obj) {
+  accessed = true;
+  if (idx === 1) {
+    testResult = false;
+  }
+}
+
+var arr = [0, , , 3];
+Object.defineProperty(arr, "0", {
+  get: function() {
+    delete Array.prototype[1];
+    return 0;
+  },
+  configurable: true
+});
+
+Array.prototype[1] = 1;
+arr.reduce(callbackfn, "initialValue");
+
+assert(testResult, 'testResult !== true');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-b-25.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-b-25.js
new file mode 100644
index 0000000000..7d5a359b7b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-b-25.js
@@ -0,0 +1,40 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - deleting own property with prototype
+    property causes prototype index property to be visited on an
+    Array-like object
+---*/
+
+var testResult = false;
+
+function callbackfn(accum, val, idx, obj) {
+  if (idx === 1 && val === 1) {
+    testResult = true;
+  }
+}
+
+var obj = {
+  0: 0,
+  1: 111,
+  4: 10,
+  length: 10
+};
+
+Object.defineProperty(obj, "0", {
+  get: function() {
+    delete obj[1];
+    return 0;
+  },
+  configurable: true
+});
+
+Object.prototype[1] = 1;
+Array.prototype.reduce.call(obj, callbackfn, "initialValue");
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-b-26.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-b-26.js
new file mode 100644
index 0000000000..a0939b0528
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-b-26.js
@@ -0,0 +1,33 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - deleting own property with prototype
+    property causes prototype index property to be visited on an Array
+---*/
+
+var testResult = false;
+
+function callbackfn(accum, val, idx, obj) {
+  if (idx === 1 && val === 1) {
+    testResult = true;
+  }
+}
+var arr = [0, 111];
+
+Object.defineProperty(arr, "0", {
+  get: function() {
+    delete arr[1];
+    return 0;
+  },
+  configurable: true
+});
+
+Array.prototype[1] = 1;
+arr.reduce(callbackfn, "initialValue");
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-b-27.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-b-27.js
new file mode 100644
index 0000000000..81d71e0551
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-b-27.js
@@ -0,0 +1,36 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - decreasing length of array causes deleted
+    index property not to be visited
+---*/
+
+var accessed = false;
+var testResult = true;
+
+function callbackfn(accum, val, idx, obj) {
+  accessed = true;
+  if (idx === 2) {
+    testResult = false;
+  }
+}
+
+var arr = [0, 1, 2, 3];
+
+Object.defineProperty(arr, "0", {
+  get: function() {
+    arr.length = 2;
+    return 0;
+  },
+  configurable: true
+});
+
+arr.reduce(callbackfn, "initialValue");
+
+assert(testResult, 'testResult !== true');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-b-28.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-b-28.js
new file mode 100644
index 0000000000..c382d3c049
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-b-28.js
@@ -0,0 +1,39 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - decreasing length of array with prototype
+    property causes prototype index property to be visited
+---*/
+
+var testResult = false;
+
+function callbackfn(accum, val, idx, obj) {
+  if (idx === 2 && val === "prototype") {
+    testResult = true;
+  }
+}
+var arr = [0, 1, 2, 3];
+
+Object.defineProperty(Array.prototype, "2", {
+  get: function() {
+    return "prototype";
+  },
+  configurable: true
+});
+
+Object.defineProperty(arr, "0", {
+  get: function() {
+    arr.length = 2;
+    return 1;
+  },
+  configurable: true
+});
+
+arr.reduce(callbackfn, "initialValue");
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-b-29.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-b-29.js
new file mode 100644
index 0000000000..bb036b1942
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-b-29.js
@@ -0,0 +1,41 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - decreasing length of array does not
+    delete non-configurable properties
+flags: [noStrict]
+---*/
+
+var testResult = false;
+
+function callbackfn(accum, val, idx, obj) {
+  if (idx === 2 && val === "unconfigurable") {
+    testResult = true;
+  }
+}
+
+var arr = [0, 1, 2, 3];
+
+Object.defineProperty(arr, "2", {
+  get: function() {
+    return "unconfigurable";
+  },
+  configurable: false
+});
+
+Object.defineProperty(arr, "0", {
+  get: function() {
+    arr.length = 2;
+    return 1;
+  },
+  configurable: true
+});
+
+arr.reduce(callbackfn, "initialValue");
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-b-3.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-b-3.js
new file mode 100644
index 0000000000..d2b61c380b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-b-3.js
@@ -0,0 +1,39 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - deleted properties in step 2 are visible
+    here
+---*/
+
+var accessed = false;
+var testResult = true;
+
+function callbackfn(accum, val, idx, obj) {
+  accessed = true;
+  if (idx === 2) {
+    testResult = false;
+  }
+}
+
+var obj = {
+  2: "2",
+  3: 10
+};
+
+Object.defineProperty(obj, "length", {
+  get: function() {
+    delete obj[2];
+    return 5;
+  },
+  configurable: true
+});
+
+Array.prototype.reduce.call(obj, callbackfn, "initialValue");
+
+assert(accessed, 'accessed !== true');
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-b-4.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-b-4.js
new file mode 100644
index 0000000000..11e541c5ef
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-b-4.js
@@ -0,0 +1,40 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - properties added into own object in step
+    8 are visited on an Array-like object
+---*/
+
+var testResult = false;
+
+function callbackfn(accum, val, idx, obj) {
+  if (idx === 3 && val === 3) {
+    testResult = true;
+  }
+}
+
+var obj = {
+  length: 5
+};
+
+Object.defineProperty(obj, "1", {
+  get: function() {
+    Object.defineProperty(obj, "3", {
+      get: function() {
+        return 3;
+      },
+      configurable: true
+    });
+    return 1;
+  },
+  configurable: true
+});
+
+Array.prototype.reduce.call(obj, callbackfn);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-b-5.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-b-5.js
new file mode 100644
index 0000000000..c909df54cf
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-b-5.js
@@ -0,0 +1,38 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - properties added into own object in step
+    8 are visited on an Array
+---*/
+
+var testResult = false;
+
+function callbackfn(accum, val, idx, obj) {
+  if (idx === 1 && val === 1) {
+    testResult = true;
+  }
+}
+
+var arr = [0, , 2];
+
+Object.defineProperty(arr, "0", {
+  get: function() {
+    Object.defineProperty(arr, "1", {
+      get: function() {
+        return 1;
+      },
+      configurable: true
+    });
+    return 0;
+  },
+  configurable: true
+});
+
+arr.reduce(callbackfn);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-b-6.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-b-6.js
new file mode 100644
index 0000000000..80a02f023d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-b-6.js
@@ -0,0 +1,40 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - properties added to prototype in step 8
+    are visited on an Array-like object
+---*/
+
+var testResult = false;
+
+function callbackfn(accum, val, idx, obj) {
+  if (idx === 1 && val === 6.99) {
+    testResult = true;
+  }
+}
+
+var obj = {
+  length: 6
+};
+
+Object.defineProperty(obj, "0", {
+  get: function() {
+    Object.defineProperty(Object.prototype, "1", {
+      get: function() {
+        return 6.99;
+      },
+      configurable: true
+    });
+    return 0;
+  },
+  configurable: true
+});
+
+Array.prototype.reduce.call(obj, callbackfn);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-b-7.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-b-7.js
new file mode 100644
index 0000000000..5f31131b59
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-b-7.js
@@ -0,0 +1,38 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - properties added to prototype in step 8
+    are visited on an Array
+---*/
+
+var testResult = false;
+
+function callbackfn(accum, val, idx, obj) {
+  if (idx === 1 && val === 6.99) {
+    testResult = true;
+  }
+}
+
+var arr = [0, , 2];
+
+Object.defineProperty(arr, "0", {
+  get: function() {
+    Object.defineProperty(Array.prototype, "1", {
+      get: function() {
+        return 6.99;
+      },
+      configurable: true
+    });
+    return 0;
+  },
+  configurable: true
+});
+
+arr.reduce(callbackfn);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-b-8.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-b-8.js
new file mode 100644
index 0000000000..91ca865f39
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-b-8.js
@@ -0,0 +1,46 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - deleting own property in step 8 causes
+    deleted index property not to be visited on an Array-like object
+---*/
+
+var accessed = false;
+var testResult = true;
+
+function callbackfn(accum, val, idx, obj) {
+  accessed = true;
+  if (idx === 1) {
+    testResult = false;
+  }
+}
+
+var obj = {
+  5: 10,
+  length: 10
+};
+
+Object.defineProperty(obj, "1", {
+  get: function() {
+    return 6.99;
+  },
+  configurable: true
+});
+
+Object.defineProperty(obj, "0", {
+  get: function() {
+    delete obj[1];
+    return 0;
+  },
+  configurable: true
+});
+
+Array.prototype.reduce.call(obj, callbackfn);
+
+assert(testResult, 'testResult !== true');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-b-9.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-b-9.js
new file mode 100644
index 0000000000..9ccd019873
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-b-9.js
@@ -0,0 +1,36 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - deleting own property in step 8 causes
+    deleted index property not to be visited on an Array
+---*/
+
+var accessed = false;
+var testResult = true;
+
+function callbackfn(accum, val, idx, obj) {
+  accessed = true;
+  if (idx === 1) {
+    testResult = false;
+  }
+}
+
+var arr = [1, 2, 4];
+
+Object.defineProperty(arr, "0", {
+  get: function() {
+    delete arr[1];
+    return 0;
+  },
+  configurable: true
+});
+
+arr.reduce(callbackfn);
+
+assert(testResult, 'testResult !== true');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-1.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-1.js
new file mode 100644
index 0000000000..749f146c19
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-1.js
@@ -0,0 +1,25 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - callbackfn not called for indexes never
+    been assigned values
+---*/
+
+var callCnt = 0;
+
+function callbackfn(prevVal, curVal, idx, obj)
+{
+  callCnt++;
+  return curVal;
+}
+
+var arr = new Array(10);
+arr[0] = arr[1] = undefined; //explicitly assigning a value
+
+assert.sameValue(arr.reduce(callbackfn), undefined, 'arr.reduce(callbackfn)');
+assert.sameValue(callCnt, 1, 'callCnt');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-i-1.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-i-1.js
new file mode 100644
index 0000000000..e7639b790b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-i-1.js
@@ -0,0 +1,30 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - element to be retrieved is own data
+    property on an Array-like object
+---*/
+
+var testResult = false;
+var initialValue = 0;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx === 1) {
+    testResult = (curVal === 1);
+  }
+}
+
+var obj = {
+  0: 0,
+  1: 1,
+  2: 2,
+  length: 2
+};
+Array.prototype.reduce.call(obj, callbackfn, initialValue);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-i-10.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-i-10.js
new file mode 100644
index 0000000000..4c7c666a42
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-i-10.js
@@ -0,0 +1,33 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - element to be retrieved is own accessor
+    property on an Array
+---*/
+
+var testResult = false;
+var initialValue = 0;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx === 1) {
+    testResult = (curVal === 1);
+  }
+}
+
+var arr = [0, , 2];
+
+Object.defineProperty(arr, "1", {
+  get: function() {
+    return 1;
+  },
+  configurable: true
+});
+
+arr.reduce(callbackfn, initialValue);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-i-11.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-i-11.js
new file mode 100644
index 0000000000..d188f7d158
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-i-11.js
@@ -0,0 +1,44 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - element to be retrieved is own accessor
+    property that overrides an inherited data property on an
+    Array-like object
+---*/
+
+var testResult = false;
+var initialValue = 0;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx === 1) {
+    testResult = (curVal === "11");
+  }
+}
+
+var proto = {
+  0: 0,
+  1: 1,
+  2: 2
+};
+
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+child.length = 3;
+
+Object.defineProperty(child, "1", {
+  get: function() {
+    return "11";
+  },
+  configurable: true
+});
+
+Array.prototype.reduce.call(child, callbackfn, initialValue);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-i-12.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-i-12.js
new file mode 100644
index 0000000000..325721cdb3
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-i-12.js
@@ -0,0 +1,34 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - element to be retrieved is own accessor
+    property that overrides an inherited data property on an Array
+---*/
+
+var testResult = false;
+var initialValue = 0;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx === 1) {
+    testResult = (curVal === "11");
+  }
+}
+
+Array.prototype[1] = 1;
+var arr = [0, , 2];
+
+Object.defineProperty(arr, "1", {
+  get: function() {
+    return "11";
+  },
+  configurable: true
+});
+
+arr.reduce(callbackfn, initialValue);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-i-13.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-i-13.js
new file mode 100644
index 0000000000..3eed9913f7
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-i-13.js
@@ -0,0 +1,50 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - element to be retrieved is own accessor
+    property that overrides an inherited accessor property on an
+    Array-like object
+---*/
+
+var testResult = false;
+var initialValue = 0;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx === 1) {
+    testResult = (curVal === "11");
+  }
+}
+
+var proto = {
+  0: 0,
+  2: 2
+};
+
+Object.defineProperty(proto, "1", {
+  get: function() {
+    return 1;
+  },
+  configurable: true
+});
+
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+child.length = 3;
+
+Object.defineProperty(child, "1", {
+  get: function() {
+    return "11";
+  },
+  configurable: true
+});
+
+Array.prototype.reduce.call(child, callbackfn, initialValue);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-i-14.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-i-14.js
new file mode 100644
index 0000000000..ccf3277480
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-i-14.js
@@ -0,0 +1,39 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - element to be retrieved is own accessor
+    property that overrides an inherited accessor property on an Array
+---*/
+
+var testResult = false;
+var initialValue = 0;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx === 1) {
+    testResult = (curVal === "11");
+  }
+}
+
+Object.defineProperty(Array.prototype, "1", {
+  get: function() {
+    return 1;
+  },
+  configurable: true
+});
+
+var arr = [0, , 2];
+
+Object.defineProperty(arr, "1", {
+  get: function() {
+    return "11";
+  },
+  configurable: true
+});
+arr.reduce(callbackfn, initialValue);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-i-15.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-i-15.js
new file mode 100644
index 0000000000..9d3c2e3eea
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-i-15.js
@@ -0,0 +1,42 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - element to be retrieved is inherited
+    accessor property on an Array-like object
+---*/
+
+var testResult = false;
+var initialValue = 0;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx === 1) {
+    testResult = (curVal === 1);
+  }
+}
+
+var proto = {
+  0: 0,
+  2: 2
+};
+
+Object.defineProperty(proto, "1", {
+  get: function() {
+    return 1;
+  },
+  configurable: true
+});
+
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+child.length = 3;
+
+Array.prototype.reduce.call(child, callbackfn, initialValue);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-i-16.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-i-16.js
new file mode 100644
index 0000000000..611db7802a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-i-16.js
@@ -0,0 +1,33 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - element to be retrieved is inherited
+    accessor property on an Array
+---*/
+
+var testResult = false;
+var initialValue = 0;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx === 1) {
+    testResult = (curVal === 1);
+  }
+}
+
+Object.defineProperty(Array.prototype, "1", {
+  get: function() {
+    return 1;
+  },
+  configurable: true
+});
+
+var arr = [0, , 2, ];
+
+arr.reduce(callbackfn, initialValue);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-i-17.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-i-17.js
new file mode 100644
index 0000000000..720b3fa366
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-i-17.js
@@ -0,0 +1,35 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - element to be retrieved is own accessor
+    property without a get function on an Array-like object
+---*/
+
+var testResult = false;
+var initialValue = 0;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx === 1) {
+    testResult = (curVal === undefined);
+  }
+}
+
+var obj = {
+  0: 0,
+  2: 2,
+  length: 3
+};
+
+Object.defineProperty(obj, "1", {
+  set: function() {},
+  configurable: true
+});
+
+Array.prototype.reduce.call(obj, callbackfn, initialValue);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-i-18.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-i-18.js
new file mode 100644
index 0000000000..2c2018cafc
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-i-18.js
@@ -0,0 +1,31 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - element to be retrieved is own accessor
+    property without a get function on an Array
+---*/
+
+var testResult = false;
+var initialValue = 0;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx === 1) {
+    testResult = (curVal === undefined);
+  }
+}
+
+var arr = [0, , 2];
+
+Object.defineProperty(arr, "1", {
+  set: function() {},
+  configurable: true
+});
+
+arr.reduce(callbackfn, initialValue);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-i-19.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-i-19.js
new file mode 100644
index 0000000000..aa81d7149c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-i-19.js
@@ -0,0 +1,43 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - element to be retrieved is own accessor
+    property without a get function that overrides an inherited
+    accessor property on an Array-like object
+---*/
+
+var testResult = false;
+var initialValue = 0;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx === 1) {
+    testResult = (curVal === undefined);
+  }
+}
+
+Object.defineProperty(Object.prototype, "1", {
+  get: function() {
+    return 1;
+  },
+  configurable: true
+});
+
+var obj = {
+  0: 0,
+  2: 2,
+  length: 3
+};
+
+Object.defineProperty(obj, "1", {
+  set: function() {},
+  configurable: true
+});
+
+Array.prototype.reduce.call(obj, callbackfn, initialValue);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-i-2.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-i-2.js
new file mode 100644
index 0000000000..2ae2989b74
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-i-2.js
@@ -0,0 +1,25 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - element to be retrieved is own data
+    property on an Array
+---*/
+
+var testResult = false;
+var initialValue = 0;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx === 1) {
+    testResult = (curVal === 1);
+  }
+}
+
+var arr = [0, 1];
+arr.reduce(callbackfn, initialValue);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-i-20.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-i-20.js
new file mode 100644
index 0000000000..5268899bc3
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-i-20.js
@@ -0,0 +1,38 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - element to be retrieved is own accessor
+    property without a get function that overrides an inherited
+    accessor property on an Array
+---*/
+
+var testResult = false;
+var initialValue = 0;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx === 1) {
+    testResult = (curVal === undefined);
+  }
+}
+
+Object.defineProperty(Array.prototype, "1", {
+  get: function() {
+    return 11;
+  },
+  configurable: true
+});
+
+var arr = [0, , 2];
+Object.defineProperty(arr, "1", {
+  set: function() {},
+  configurable: true
+});
+
+arr.reduce(callbackfn, initialValue);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-i-21.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-i-21.js
new file mode 100644
index 0000000000..e8bdb0bc83
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-i-21.js
@@ -0,0 +1,40 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - element to be retrieved is inherited
+    accessor property without a get function on an Array-like object
+---*/
+
+var testResult = false;
+var initialValue = 0;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx === 1) {
+    testResult = (curVal === undefined);
+  }
+}
+
+var proto = {
+  0: 0,
+  2: 2
+};
+
+Object.defineProperty(proto, "1", {
+  set: function() {},
+  configurable: true
+});
+
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+child.length = 3;
+
+Array.prototype.reduce.call(child, callbackfn, initialValue);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-i-22.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-i-22.js
new file mode 100644
index 0000000000..d6c37f0def
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-i-22.js
@@ -0,0 +1,31 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - element to be retrieved is inherited
+    accessor property without a get function on an Array
+---*/
+
+var testResult = false;
+var initialValue = 0;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx === 1) {
+    testResult = (curVal === undefined);
+  }
+}
+
+Object.defineProperty(Array.prototype, "1", {
+  set: function() {},
+  configurable: true
+});
+
+var arr = [0, , 2];
+
+arr.reduce(callbackfn, initialValue);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-i-25.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-i-25.js
new file mode 100644
index 0000000000..cf14798787
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-i-25.js
@@ -0,0 +1,29 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - This object is the Arguments object which
+    implements its own property get method (number of arguments is
+    less than number of parameters)
+---*/
+
+var testResult = false;
+var initialValue = 0;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx === 1) {
+    testResult = (curVal === 1);
+  }
+}
+
+var func = function(a, b, c) {
+  Array.prototype.reduce.call(arguments, callbackfn, initialValue);
+};
+
+func(0, 1);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-i-26.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-i-26.js
new file mode 100644
index 0000000000..790beb9588
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-i-26.js
@@ -0,0 +1,29 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - This object is the Arguments object which
+    implements its own property get method (number of arguments equals
+    number of parameters)
+---*/
+
+var testResult = false;
+var initialValue = 0;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx === 2) {
+    testResult = (curVal === 2);
+  }
+}
+
+var func = function(a, b, c) {
+  Array.prototype.reduce.call(arguments, callbackfn, initialValue);
+};
+
+func(0, 1, 2);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-i-27.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-i-27.js
new file mode 100644
index 0000000000..59cd5addbc
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-i-27.js
@@ -0,0 +1,29 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - This object is the Arguments object which
+    implements its own property get method (number of arguments is
+    greater than number of parameters)
+---*/
+
+var testResult = false;
+var initialValue = 0;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx === 3) {
+    testResult = (curVal === 3);
+  }
+}
+
+var func = function(a, b, c) {
+  Array.prototype.reduce.call(arguments, callbackfn, initialValue);
+};
+
+func(0, 1, 2, 3);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-i-28.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-i-28.js
new file mode 100644
index 0000000000..8be9460f76
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-i-28.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - applied to String object, which
+    implements its own property get method
+---*/
+
+var testResult = false;
+var initialValue = 0;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx === 1) {
+    testResult = (curVal === "1");
+  }
+}
+
+var str = new String("012");
+
+Array.prototype.reduce.call(str, callbackfn, initialValue);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-i-29.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-i-29.js
new file mode 100644
index 0000000000..8f9873722d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-i-29.js
@@ -0,0 +1,32 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - applied to Function object which
+    implements its own property get method
+---*/
+
+var testResult = false;
+var initialValue = 0;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx === 1) {
+    testResult = (curVal === 1);
+  }
+}
+
+var obj = function(a, b, c) {
+  return a + b + c;
+};
+obj[0] = 0;
+obj[1] = 1;
+obj[2] = 2;
+obj[3] = 3;
+
+Array.prototype.reduce.call(obj, callbackfn, initialValue);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-i-3.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-i-3.js
new file mode 100644
index 0000000000..569a310e2d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-i-3.js
@@ -0,0 +1,39 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - element to be retrieved is own data
+    property that overrides an inherited data property on an
+    Array-like object
+---*/
+
+var testResult = false;
+var initialValue = 0;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx === 1) {
+    testResult = (curVal === "11");
+  }
+}
+
+var proto = {
+  0: 0,
+  1: 1,
+  2: 2,
+  length: 2
+};
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+child[1] = "11";
+child[2] = "22";
+child.length = 3;
+
+Array.prototype.reduce.call(child, callbackfn, initialValue);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-i-30.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-i-30.js
new file mode 100644
index 0000000000..1380973eb6
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-i-30.js
@@ -0,0 +1,46 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - element changed by getter on previous
+    iterations is observed on an Array
+---*/
+
+var testResult = false;
+var initialValue = 0;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx === 1) {
+    testResult = (curVal === 1);
+  }
+}
+
+var arr = [, , 2];
+var preIterVisible = false;
+
+Object.defineProperty(arr, "0", {
+  get: function() {
+    preIterVisible = true;
+    return 0;
+  },
+  configurable: true
+});
+
+Object.defineProperty(arr, "1", {
+  get: function() {
+    if (preIterVisible) {
+      return 1;
+    } else {
+      return 100;
+    }
+  },
+  configurable: true
+});
+
+arr.reduce(callbackfn, initialValue);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-i-31.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-i-31.js
new file mode 100644
index 0000000000..7853d46bb7
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-i-31.js
@@ -0,0 +1,49 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - element changed by getter on previous
+    iterations is observed on an Array-like object
+---*/
+
+var testResult = false;
+var initialValue = 0;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx === 1) {
+    testResult = (curVal === 1);
+  }
+}
+
+var obj = {
+  2: 2,
+  length: 3
+};
+var preIterVisible = false;
+
+Object.defineProperty(obj, "0", {
+  get: function() {
+    preIterVisible = true;
+    return 0;
+  },
+  configurable: true
+});
+
+Object.defineProperty(obj, "1", {
+  get: function() {
+    if (preIterVisible) {
+      return 1;
+    } else {
+      return "11";
+    }
+  },
+  configurable: true
+});
+
+Array.prototype.reduce.call(obj, callbackfn, initialValue);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-i-32.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-i-32.js
new file mode 100644
index 0000000000..7d676d5d01
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-i-32.js
@@ -0,0 +1,39 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - unnhandled exceptions happened in getter
+    terminate iteration on an Array-like object
+---*/
+
+var accessed = false;
+var testResult = false;
+var initialValue = 0;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx >= 1) {
+    accessed = true;
+    testResult = (curVal >= 1);
+  }
+}
+
+var obj = {
+  0: 0,
+  2: 2,
+  length: 3
+};
+Object.defineProperty(obj, "1", {
+  get: function() {
+    throw new RangeError("unhandle exception happened in getter");
+  },
+  configurable: true
+});
+assert.throws(RangeError, function() {
+  Array.prototype.reduce.call(obj, callbackfn, initialValue);
+});
+assert.sameValue(accessed, false, 'accessed');
+assert.sameValue(testResult, false, 'testResult');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-i-33.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-i-33.js
new file mode 100644
index 0000000000..0e7cc93359
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-i-33.js
@@ -0,0 +1,36 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - unnhandled exceptions happened in getter
+    terminate iteration on an Array
+---*/
+
+var accessed = false;
+var testResult = false;
+var initialValue = 0;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx >= 1) {
+    accessed = true;
+    testResult = (curVal >= 1);
+  }
+}
+
+var arr = [0, , 2];
+
+Object.defineProperty(arr, "1", {
+  get: function() {
+    throw new RangeError("unhandle exception happened in getter");
+  },
+  configurable: true
+});
+assert.throws(RangeError, function() {
+  arr.reduce(callbackfn, initialValue);
+});
+assert.sameValue(accessed, false, 'accessed');
+assert.sameValue(testResult, false, 'testResult');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-i-4.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-i-4.js
new file mode 100644
index 0000000000..a50f6085f1
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-i-4.js
@@ -0,0 +1,25 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - element to be retrieved is own data
+    property that overrides an inherited data property on an Array
+---*/
+
+var testResult = false;
+var initialValue = 0;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx === 1) {
+    testResult = (curVal === 1);
+  }
+}
+
+Array.prototype[1] = "3";
+[0, 1, 2].reduce(callbackfn, initialValue);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-i-5.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-i-5.js
new file mode 100644
index 0000000000..c6fbbd7b9a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-i-5.js
@@ -0,0 +1,47 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - element to be retrieved is own data
+    property that overrides an inherited accessor property on an
+    Array-like object
+---*/
+
+var testResult = false;
+var initialValue = 0;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx === 0) {
+    testResult = (curVal === "9");
+  }
+}
+
+var proto = {};
+
+Object.defineProperty(proto, "0", {
+  get: function() {
+    return 0;
+  },
+  configurable: true
+});
+
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+child.length = 2;
+
+Object.defineProperty(child, "0", {
+  value: "9",
+  configurable: true
+});
+
+child[1] = "1";
+
+Array.prototype.reduce.call(child, callbackfn, initialValue);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-i-6.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-i-6.js
new file mode 100644
index 0000000000..804f3abf62
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-i-6.js
@@ -0,0 +1,30 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - element to be retrieved is own data
+    property that overrides an inherited accessor property on an Array
+---*/
+
+var testResult = false;
+var initialValue = 0;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx === 1) {
+    testResult = (curVal === 1);
+  }
+}
+
+Object.defineProperty(Array.prototype, "1", {
+  get: function() {
+    return "9";
+  },
+  configurable: true
+});
+[0, 1, 2].reduce(callbackfn, initialValue);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-i-7.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-i-7.js
new file mode 100644
index 0000000000..fcab20dd03
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-i-7.js
@@ -0,0 +1,36 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - element to be retrieved is inherited data
+    property on an Array-like object
+---*/
+
+var testResult = false;
+var initialValue = 0;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx === 1) {
+    testResult = (curVal === 1);
+  }
+}
+
+var proto = {
+  0: 0,
+  1: 1,
+  2: 2,
+  length: 3
+};
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+child.length = 3;
+
+Array.prototype.reduce.call(child, callbackfn, initialValue);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-i-8.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-i-8.js
new file mode 100644
index 0000000000..643caa660c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-i-8.js
@@ -0,0 +1,27 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - element to be retrieved is inherited data
+    property on an Array
+---*/
+
+var testResult = false;
+var initialValue = 0;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx === 1) {
+    testResult = (curVal === 1);
+  }
+}
+
+Array.prototype[0] = 0;
+Array.prototype[1] = 1;
+Array.prototype[2] = 2;
+[, , , ].reduce(callbackfn, initialValue);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-i-9.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-i-9.js
new file mode 100644
index 0000000000..015237b068
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-i-9.js
@@ -0,0 +1,36 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - element to be retrieved is own accessor
+    property on an Array-like object
+---*/
+
+var testResult = false;
+var initialValue = 0;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx === 1) {
+    testResult = (curVal === 1);
+  }
+}
+
+var obj = {
+  0: 0,
+  2: 2,
+  length: 3
+};
+Object.defineProperty(obj, "1", {
+  get: function() {
+    return 1;
+  },
+  configurable: true
+});
+
+Array.prototype.reduce.call(obj, callbackfn, initialValue);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-ii-1.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-ii-1.js
new file mode 100644
index 0000000000..01a67c6ee7
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-ii-1.js
@@ -0,0 +1,23 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - callbackfn called with correct parameters
+    (initialvalue not passed)
+---*/
+
+function callbackfn(prevVal, curVal, idx, obj)
+{
+  if (idx > 0 && obj[idx] === curVal && obj[idx - 1] === prevVal)
+    return curVal;
+  else
+    return false;
+}
+
+var arr = [0, 1, true, null, new Object(), "five"];
+
+assert.sameValue(arr.reduce(callbackfn), "five", 'arr.reduce(callbackfn)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-ii-10.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-ii-10.js
new file mode 100644
index 0000000000..7ed02502e4
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-ii-10.js
@@ -0,0 +1,21 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - callbackfn is called with 1 formal
+    parameter
+---*/
+
+var result = false;
+
+function callbackfn(prevVal) {
+  result = (prevVal === 1);
+}
+
+[11].reduce(callbackfn, 1);
+
+assert(result, 'result !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-ii-11.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-ii-11.js
new file mode 100644
index 0000000000..531891ff92
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-ii-11.js
@@ -0,0 +1,21 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - callbackfn is called with 2 formal
+    parameter
+---*/
+
+var result = false;
+
+function callbackfn(prevVal, curVal) {
+  result = (curVal > 10 && 1 === prevVal);
+}
+
+[11].reduce(callbackfn, 1);
+
+assert(result, 'result !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-ii-12.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-ii-12.js
new file mode 100644
index 0000000000..61cdd93308
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-ii-12.js
@@ -0,0 +1,21 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - callbackfn is called with 3 formal
+    parameter
+---*/
+
+var result = false;
+
+function callbackfn(prevVal, curVal, idx) {
+  result = (prevVal === 1 && arguments[3][idx] === curVal);
+}
+
+[11].reduce(callbackfn, 1);
+
+assert(result, 'result !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-ii-13.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-ii-13.js
new file mode 100644
index 0000000000..3a2029f943
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-ii-13.js
@@ -0,0 +1,21 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - callbackfn is called with 4 formal
+    parameter
+---*/
+
+var result = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  result = (prevVal === 1 && obj[idx] === curVal);
+}
+
+[11].reduce(callbackfn, 1);
+
+assert(result, 'result !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-ii-14.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-ii-14.js
new file mode 100644
index 0000000000..5b6b548b7d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-ii-14.js
@@ -0,0 +1,19 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: Array.prototype.reduce - callbackfn that uses arguments
+---*/
+
+var result = false;
+
+function callbackfn() {
+  result = (arguments[0] === 1 && arguments[3][arguments[2]] === arguments[1]);
+}
+
+[11].reduce(callbackfn, 1);
+
+assert(result, 'result !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-ii-16.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-ii-16.js
new file mode 100644
index 0000000000..bd1c1e68f9
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-ii-16.js
@@ -0,0 +1,37 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: Array.prototype.reduce - non-indexed properties are not called
+---*/
+
+var accessed = false;
+var result1 = true;
+var result2 = true;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  accessed = true;
+  if (curVal === 8) {
+    result1 = false;
+  }
+
+  if (prevVal === 8) {
+    result2 = false;
+  }
+}
+
+var obj = {
+  0: 11,
+  10: 12,
+  non_index_property: 8,
+  length: 20
+};
+
+Array.prototype.reduce.call(obj, callbackfn, 1);
+
+assert(result1, 'result1 !== true');
+assert(result2, 'result2 !== true');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-ii-17.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-ii-17.js
new file mode 100644
index 0000000000..6389a25655
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-ii-17.js
@@ -0,0 +1,29 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - 'accumulator' used for current iteration
+    is the result of previous iteration on an Array
+---*/
+
+var result = true;
+var accessed = false;
+var preIteration = 1;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  accessed = true;
+  if (preIteration !== prevVal) {
+    result = false;
+  }
+  preIteration = curVal;
+  return curVal;
+}
+
+[11, 12, 13].reduce(callbackfn, 1);
+
+assert(result, 'result !== true');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-ii-18.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-ii-18.js
new file mode 100644
index 0000000000..0bcaab5cb3
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-ii-18.js
@@ -0,0 +1,30 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - value of 'accumulator' used for first
+    iteration is the value of 'initialValue' when it is present on an
+    Array-like object
+---*/
+
+var result = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx === 0) {
+    result = (arguments[0] === 1);
+  }
+}
+
+var obj = {
+  0: 11,
+  1: 9,
+  length: 2
+};
+
+Array.prototype.reduce.call(obj, callbackfn, 1);
+
+assert(result, 'result !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-ii-19.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-ii-19.js
new file mode 100644
index 0000000000..e4332b2cef
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-ii-19.js
@@ -0,0 +1,27 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - value of 'accumulator' used for first
+    iteration is the value of least index property which is not
+    undefined when 'initialValue' is not present on an Array
+---*/
+
+var called = 0;
+var result = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  called++;
+  if (idx === 1) {
+    result = (prevVal === 11) && curVal === 9;
+  }
+}
+
+[11, 9].reduce(callbackfn);
+
+assert(result, 'result !== true');
+assert.sameValue(called, 1, 'called');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-ii-2.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-ii-2.js
new file mode 100644
index 0000000000..9221d07ff2
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-ii-2.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - callbackfn called with correct parameters
+    (initialvalue passed)
+---*/
+
+var bParCorrect = false;
+
+function callbackfn(prevVal, curVal, idx, obj)
+{
+  if (idx === 0 && obj[idx] === curVal && prevVal === initialValue)
+    return curVal;
+  else if (idx > 0 && obj[idx] === curVal && obj[idx - 1] === prevVal)
+    return curVal;
+  else
+    return false;
+}
+
+var arr = [0, 1, true, null, new Object(), "five"];
+var initialValue = 5.5;
+
+assert.sameValue(arr.reduce(callbackfn, initialValue), "five", 'arr.reduce(callbackfn,initialValue)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-ii-20.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-ii-20.js
new file mode 100644
index 0000000000..51594de3c5
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-ii-20.js
@@ -0,0 +1,24 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: Array.prototype.reduce - undefined can be used as accumulator
+---*/
+
+var accessed = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  accessed = true;
+  return typeof prevVal === "undefined";
+}
+
+var obj = {
+  0: 11,
+  length: 1
+};
+
+assert.sameValue(Array.prototype.reduce.call(obj, callbackfn, undefined), true, 'Array.prototype.reduce.call(obj, callbackfn, undefined)');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-ii-21.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-ii-21.js
new file mode 100644
index 0000000000..48f16b2c1b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-ii-21.js
@@ -0,0 +1,24 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: Array.prototype.reduce - null can be used as accumulator
+---*/
+
+var accessed = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  accessed = true;
+  return prevVal === null;
+}
+
+var obj = {
+  0: 11,
+  length: 1
+};
+
+assert.sameValue(Array.prototype.reduce.call(obj, callbackfn, null), true, 'Array.prototype.reduce.call(obj, callbackfn, null)');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-ii-22.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-ii-22.js
new file mode 100644
index 0000000000..a418171cec
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-ii-22.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - boolean primitive can be used as
+    accumulator
+---*/
+
+var accessed = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  accessed = true;
+  return prevVal === false;
+}
+
+var obj = {
+  0: 11,
+  length: 1
+};
+
+assert.sameValue(Array.prototype.reduce.call(obj, callbackfn, false), true, 'Array.prototype.reduce.call(obj, callbackfn, false)');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-ii-23.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-ii-23.js
new file mode 100644
index 0000000000..93676ebf11
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-ii-23.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - number primitive can be used as
+    accumulator
+---*/
+
+var accessed = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  accessed = true;
+  return prevVal === 12;
+}
+
+var obj = {
+  0: 11,
+  length: 1
+};
+
+assert.sameValue(Array.prototype.reduce.call(obj, callbackfn, 12), true, 'Array.prototype.reduce.call(obj, callbackfn, 12)');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-ii-24.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-ii-24.js
new file mode 100644
index 0000000000..937acec0b2
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-ii-24.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - string primitive can be used as
+    accumulator
+---*/
+
+var accessed = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  accessed = true;
+  return prevVal === "hello_";
+}
+
+var obj = {
+  0: 11,
+  length: 1
+};
+
+assert.sameValue(Array.prototype.reduce.call(obj, callbackfn, "hello_"), true, 'Array.prototype.reduce.call(obj, callbackfn, "hello_")');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-ii-25.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-ii-25.js
new file mode 100644
index 0000000000..58bcbd7f40
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-ii-25.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: Array.prototype.reduce - Function object can be used as accumulator
+---*/
+
+var objFunction = function() {};
+
+var accessed = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  accessed = true;
+  return prevVal === objFunction;
+}
+
+var obj = {
+  0: 11,
+  length: 1
+};
+
+assert.sameValue(Array.prototype.reduce.call(obj, callbackfn, objFunction), true, 'Array.prototype.reduce.call(obj, callbackfn, objFunction)');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-ii-26.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-ii-26.js
new file mode 100644
index 0000000000..e610d26a66
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-ii-26.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: Array.prototype.reduce - Array object can be used as accumulator
+---*/
+
+var objArray = new Array(10);
+
+var accessed = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  accessed = true;
+  return prevVal === objArray;
+}
+
+var obj = {
+  0: 11,
+  length: 1
+};
+
+assert.sameValue(Array.prototype.reduce.call(obj, callbackfn, objArray), true, 'Array.prototype.reduce.call(obj, callbackfn, objArray)');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-ii-27.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-ii-27.js
new file mode 100644
index 0000000000..52c7a8d870
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-ii-27.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: Array.prototype.reduce - String object can be used as accumulator
+---*/
+
+var objString = new String();
+
+var accessed = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  accessed = true;
+  return prevVal === objString;
+}
+
+var obj = {
+  0: 11,
+  length: 1
+};
+
+assert.sameValue(Array.prototype.reduce.call(obj, callbackfn, objString), true, 'Array.prototype.reduce.call(obj, callbackfn, objString)');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-ii-28.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-ii-28.js
new file mode 100644
index 0000000000..b36d411d9d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-ii-28.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: Array.prototype.reduce - Boolean object can be used as accumulator
+---*/
+
+var objBoolean = new Boolean();
+
+var accessed = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  accessed = true;
+  return prevVal === objBoolean;
+}
+
+var obj = {
+  0: 11,
+  length: 1
+};
+
+assert.sameValue(Array.prototype.reduce.call(obj, callbackfn, objBoolean), true, 'Array.prototype.reduce.call(obj, callbackfn, objBoolean)');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-ii-29.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-ii-29.js
new file mode 100644
index 0000000000..ef666f11a8
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-ii-29.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: Array.prototype.reduce - Number object can be used as accumulator
+---*/
+
+var objNumber = new Number();
+
+var accessed = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  accessed = true;
+  return prevVal === objNumber;
+}
+
+var obj = {
+  0: 11,
+  length: 1
+};
+
+assert.sameValue(Array.prototype.reduce.call(obj, callbackfn, objNumber), true, 'Array.prototype.reduce.call(obj, callbackfn, objNumber)');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-ii-3.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-ii-3.js
new file mode 100644
index 0000000000..484f4def97
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-ii-3.js
@@ -0,0 +1,24 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: Array.prototype.reduce - callbackfn takes 4 arguments
+---*/
+
+var bCalled = false;
+
+function callbackfn(prevVal, curVal, idx, obj)
+{
+  bCalled = true;
+  if (prevVal === true && arguments.length === 4)
+    return true;
+  else
+    return false;
+}
+var arr = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9];
+
+assert.sameValue(arr.reduce(callbackfn, true), true, 'arr.reduce(callbackfn,true)');
+assert.sameValue(bCalled, true, 'bCalled');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-ii-30.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-ii-30.js
new file mode 100644
index 0000000000..3fbc3f2276
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-ii-30.js
@@ -0,0 +1,24 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: Array.prototype.reduce - the Math object can be used as accumulator
+---*/
+
+var accessed = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  accessed = true;
+  return prevVal === Math;
+}
+
+var obj = {
+  0: 11,
+  length: 1
+};
+
+assert.sameValue(Array.prototype.reduce.call(obj, callbackfn, Math), true, 'Array.prototype.reduce.call(obj, callbackfn, Math)');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-ii-31.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-ii-31.js
new file mode 100644
index 0000000000..009e44f687
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-ii-31.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: Array.prototype.reduce - Date object can be used as accumulator
+---*/
+
+var objDate = new Date();
+
+var accessed = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  accessed = true;
+  return prevVal === objDate;
+}
+
+var obj = {
+  0: 11,
+  length: 1
+};
+
+assert.sameValue(Array.prototype.reduce.call(obj, callbackfn, objDate), true, 'Array.prototype.reduce.call(obj, callbackfn, objDate)');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-ii-32.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-ii-32.js
new file mode 100644
index 0000000000..1e226ccbc4
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-ii-32.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: Array.prototype.reduce - RegExp object can be used as accumulator
+---*/
+
+var objRegExp = new RegExp();
+
+var accessed = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  accessed = true;
+  return prevVal === objRegExp;
+}
+
+var obj = {
+  0: 11,
+  length: 1
+};
+
+assert.sameValue(Array.prototype.reduce.call(obj, callbackfn, objRegExp), true, 'Array.prototype.reduce.call(obj, callbackfn, objRegExp)');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-ii-33.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-ii-33.js
new file mode 100644
index 0000000000..f73446cdfc
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-ii-33.js
@@ -0,0 +1,24 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: Array.prototype.reduce - the JSON can be used as accumulator
+---*/
+
+var accessed = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  accessed = true;
+  return prevVal === JSON;
+}
+
+var obj = {
+  0: 11,
+  length: 1
+};
+
+assert.sameValue(Array.prototype.reduce.call(obj, callbackfn, JSON), true, 'Array.prototype.reduce.call(obj, callbackfn, JSON)');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-ii-34.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-ii-34.js
new file mode 100644
index 0000000000..84a311f748
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-ii-34.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: Array.prototype.reduce - Error object can be used as accumulator
+---*/
+
+var objError = new RangeError();
+
+var accessed = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  accessed = true;
+  return prevVal === objError;
+}
+
+var obj = {
+  0: 11,
+  length: 1
+};
+
+assert.sameValue(Array.prototype.reduce.call(obj, callbackfn, objError), true, 'Array.prototype.reduce.call(obj, callbackfn, objError)');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-ii-35.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-ii-35.js
new file mode 100644
index 0000000000..62801208a0
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-ii-35.js
@@ -0,0 +1,31 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - the Arguments object can be used as
+    accumulator
+---*/
+
+var accessed = false;
+var arg;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  accessed = true;
+  return prevVal === arg;
+}
+
+var obj = {
+  0: 11,
+  length: 1
+};
+
+(function fun() {
+  arg = arguments;
+}(10, 11, 12, 13));
+
+assert.sameValue(Array.prototype.reduce.call(obj, callbackfn, arg), true, 'Array.prototype.reduce.call(obj, callbackfn, arg)');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-ii-37.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-ii-37.js
new file mode 100644
index 0000000000..8c736bc96b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-ii-37.js
@@ -0,0 +1,27 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - the global object can be used as
+    accumulator
+---*/
+
+var global = this;
+var accessed = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  accessed = true;
+  return prevVal === global;
+}
+
+var obj = {
+  0: 11,
+  length: 1
+};
+
+assert.sameValue(Array.prototype.reduce.call(obj, callbackfn, this), true, 'Array.prototype.reduce.call(obj, callbackfn, this)');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-ii-4-s.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-ii-4-s.js
new file mode 100644
index 0000000000..deff6b06a3
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-ii-4-s.js
@@ -0,0 +1,24 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - undefined passed as thisValue to strict
+    callbackfn
+flags: [noStrict]
+---*/
+
+var innerThisCorrect = false;
+
+function callbackfn(prevVal, curVal, idx, obj)
+{
+  "use strict";
+  innerThisCorrect = this === undefined;
+  return true;
+}
+[0].reduce(callbackfn, true);
+
+assert(innerThisCorrect, 'innerThisCorrect !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-ii-4.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-ii-4.js
new file mode 100644
index 0000000000..31dbdaea73
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-ii-4.js
@@ -0,0 +1,30 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - k values are passed in acending numeric
+    order on an Array
+---*/
+
+var arr = [0, 1, 2];
+var lastIdx = 0;
+var result = true;
+var accessed = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  accessed = true;
+  if (lastIdx !== idx) {
+    result = false;
+  } else {
+    lastIdx++;
+  }
+}
+
+arr.reduce(callbackfn, 11);
+
+assert(result, 'result !== true');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-ii-5.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-ii-5.js
new file mode 100644
index 0000000000..efb6db149f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-ii-5.js
@@ -0,0 +1,35 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - k values are accessed during each
+    iteration and not prior to starting the loop on an Array
+---*/
+
+var result = true;
+var kIndex = [];
+var called = 0;
+
+//By below way, we could verify that k would be setted as 0, 1, ..., length - 1 in order, and each value will be setted one time.
+function callbackfn(prevVal, curVal, idx, obj) {
+  //Each position should be visited one time, which means k is accessed one time during iterations.
+  called++;
+  if (typeof kIndex[idx] === "undefined") {
+    //when current position is visited, its previous index should has been visited.
+    if (idx !== 0 && typeof kIndex[idx - 1] === "undefined") {
+      result = false;
+    }
+    kIndex[idx] = 1;
+  } else {
+    result = false;
+  }
+}
+
+[11, 12, 13, 14].reduce(callbackfn, 1);
+
+assert(result, 'result !== true');
+assert.sameValue(called, 4, 'called');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-ii-7.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-ii-7.js
new file mode 100644
index 0000000000..03ebf20fba
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-ii-7.js
@@ -0,0 +1,33 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - unhandled exceptions happened in
+    callbackfn terminate iteration
+---*/
+
+var accessed = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx > 0) {
+    accessed = true;
+  }
+  if (idx === 0) {
+    throw new Error("Exception occurred in callbackfn");
+  }
+}
+
+var obj = {
+  0: 11,
+  4: 10,
+  10: 8,
+  length: 20
+};
+assert.throws(Error, function() {
+  Array.prototype.reduce.call(obj, callbackfn, 1);
+});
+assert.sameValue(accessed, false, 'accessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-ii-8.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-ii-8.js
new file mode 100644
index 0000000000..135566d8a4
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-ii-8.js
@@ -0,0 +1,33 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - element changed by callbackfn on previous
+    iterations is observed
+---*/
+
+var result = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx === 0) {
+    obj[idx + 1] = 8;
+  }
+
+  if (idx === 1) {
+    result = (curVal === 8);
+  }
+}
+
+var obj = {
+  0: 11,
+  1: 12,
+  length: 2
+};
+
+Array.prototype.reduce.call(obj, callbackfn, 1);
+
+assert(result, 'result !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-ii-9.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-ii-9.js
new file mode 100644
index 0000000000..1d317d4d44
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-ii-9.js
@@ -0,0 +1,21 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+    Array.prototype.reduce - callbackfn is called with 0 formal
+    parameter
+---*/
+
+var called = 0;
+
+function callbackfn() {
+  called++;
+}
+
+[11, 12].reduce(callbackfn, 1);
+
+assert.sameValue(called, 2, 'called');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/browser.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/browser.js
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/call-with-boolean.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/call-with-boolean.js
new file mode 100644
index 0000000000..f7063cd6c9
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/call-with-boolean.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2020 Rick Waldron.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: Array.prototype.reduce applied to boolean primitive
+---*/
+
+assert.sameValue(
+  Array.prototype.reduce.call(true, () => {}, -1),
+  -1,
+  'Array.prototype.reduce.call(true, () => {}, -1) must return -1'
+);
+assert.sameValue(
+  Array.prototype.reduce.call(false, () => {}, -1),
+  -1,
+  'Array.prototype.reduce.call(false, () => {}, -1) must return -1'
+);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/callbackfn-resize-arraybuffer.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/callbackfn-resize-arraybuffer.js
new file mode 100644
index 0000000000..7196680bec
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/callbackfn-resize-arraybuffer.js
@@ -0,0 +1,76 @@
+// |reftest| shell-option(--enable-arraybuffer-resizable) skip-if(!ArrayBuffer.prototype.resize||!xulRuntime.shell) -- resizable-arraybuffer is not enabled unconditionally, requires shell-options
+// Copyright (C) 2021 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.reduce
+description: TypedArray instance buffer can be resized during iteration
+includes: [testTypedArray.js, compareArray.js]
+features: [TypedArray, resizable-arraybuffer]
+---*/
+
+testWithTypedArrayConstructors(function(TA) {
+  var BPE = TA.BYTES_PER_ELEMENT;
+  var buffer = new ArrayBuffer(BPE * 3, {maxByteLength: BPE * 3});
+  var sample = new TA(buffer);
+  var expectedPrevs, expectedNexts, expectedIndices, expectedArrays;
+  var prevs, nexts, indices, arrays, result;
+
+  prevs = [];
+  nexts = [];
+  indices = [];
+  arrays = [];
+  result = Array.prototype.reduce.call(sample, function(prev, next, index, array) {
+    if (prevs.length === 0) {
+      try {
+        buffer.resize(2 * BPE);
+        expectedPrevs = [262, 0];
+        expectedNexts = [0, 0];
+        expectedIndices = [0, 1];
+        expectedArrays = [sample, sample];
+      } catch (_) {
+        expectedPrevs = [262, 0, 1];
+        expectedNexts = [0, 0, 0];
+        expectedIndices = [0, 1, 2];
+        expectedArrays = [sample, sample, sample];
+      }
+    }
+
+    prevs.push(prev);
+    nexts.push(next);
+    indices.push(index);
+    arrays.push(array);
+    return index;
+  }, 262);
+
+  assert.compareArray(prevs, expectedPrevs, 'prevs (shrink)');
+  assert.compareArray(nexts, expectedNexts, 'nexts (shrink)');
+  assert.compareArray(indices, expectedIndices, 'indices (shrink)');
+  assert.compareArray(arrays, expectedArrays, 'arrays (shrink)');
+  assert.sameValue(result, expectedIndices[expectedIndices.length - 1], 'result (shrink)');
+
+  prevs = [];
+  nexts = [];
+  indices = [];
+  arrays = [];
+  result = Array.prototype.reduce.call(sample, function(prev, next, index, array) {
+    if (prevs.length === 0) {
+      try {
+        buffer.resize(3 * BPE);
+      } catch (_) {}
+    }
+
+    prevs.push(prev);
+    nexts.push(next);
+    indices.push(index);
+    arrays.push(array);
+    return index;
+  }, 262);
+
+  assert.compareArray(prevs, expectedPrevs, 'prevs (grow)');
+  assert.compareArray(nexts, expectedNexts, 'nexts (grow)');
+  assert.compareArray(indices, expectedIndices, 'indices (grow)');
+  assert.compareArray(arrays, expectedArrays, 'arrays (grow)');
+  assert.sameValue(result, expectedIndices[expectedIndices.length - 1], 'result (grow)');
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/length.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/length.js
new file mode 100644
index 0000000000..46705546bd
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/length.js
@@ -0,0 +1,30 @@
+// Copyright (C) 2017 Leo Balter. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+  The "length" property of Array.prototype.reduce
+info: |
+  17 ECMAScript Standard Built-in Objects
+
+  Every built-in function object, including constructors, has a length property
+  whose value is an integer. Unless otherwise specified, this value is equal to
+  the largest number of named arguments shown in the subclause headings for the
+  function description. Optional parameters (which are indicated with brackets:
+  [ ]) or rest parameters (which are shown using the form «...name») are not
+  included in the default argument count.
+
+  Unless otherwise specified, the length property of a built-in function object
+  has the attributes { [[Writable]]: false, [[Enumerable]]: false,
+    [[Configurable]]: true }.
+includes: [propertyHelper.js]
+---*/
+
+assert.sameValue(Array.prototype.reduce.length, 1);
+
+verifyNotEnumerable(Array.prototype.reduce, 'length');
+verifyNotWritable(Array.prototype.reduce, 'length');
+verifyConfigurable(Array.prototype.reduce, 'length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/name.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/name.js
new file mode 100644
index 0000000000..0b368568bd
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/name.js
@@ -0,0 +1,28 @@
+// Copyright (C) 2015 André Bargull. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+  Array.prototype.reduce.name is "reduce".
+info: |
+  Array.prototype.reduce ( callbackfn [ , initialValue ] )
+
+  17 ECMAScript Standard Built-in Objects:
+    Every built-in Function object, including constructors, that is not
+    identified as an anonymous function has a name property whose value
+    is a String.
+
+    Unless otherwise specified, the name property of a built-in Function
+    object, if it exists, has the attributes { [[Writable]]: false,
+    [[Enumerable]]: false, [[Configurable]]: true }.
+includes: [propertyHelper.js]
+---*/
+
+assert.sameValue(Array.prototype.reduce.name, "reduce");
+
+verifyNotEnumerable(Array.prototype.reduce, "name");
+verifyNotWritable(Array.prototype.reduce, "name");
+verifyConfigurable(Array.prototype.reduce, "name");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/not-a-constructor.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/not-a-constructor.js
new file mode 100644
index 0000000000..66a7e1f277
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/not-a-constructor.js
@@ -0,0 +1,35 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Array.prototype.reduce does not implement [[Construct]], is not new-able
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+
+  sec-evaluatenew
+
+  ...
+  7. If IsConstructor(constructor) is false, throw a TypeError exception.
+  ...
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Array.prototype.reduce),
+  false,
+  'isConstructor(Array.prototype.reduce) must return false'
+);
+
+assert.throws(TypeError, () => {
+  new Array.prototype.reduce(() => {}, []);
+}, '`new Array.prototype.reduce(() => {}, [])` throws TypeError');
+
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/prop-desc.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/prop-desc.js
new file mode 100644
index 0000000000..c2bdef04e7
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/prop-desc.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2017 Leo Balter. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduce
+description: >
+  "reduce" property of Array.prototype
+info: |
+  17 ECMAScript Standard Built-in Objects
+  
+  Every other data property described in clauses 18 through 26 and in Annex B.2
+  has the attributes { [[Writable]]: true, [[Enumerable]]: false,
+    [[Configurable]]: true } unless otherwise specified.
+includes: [propertyHelper.js]
+---*/
+
+assert.sameValue(typeof Array.prototype.reduce, 'function', 'typeof');
+
+verifyNotEnumerable(Array.prototype, "reduce");
+verifyWritable(Array.prototype, "reduce");
+verifyConfigurable(Array.prototype, "reduce");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/shell.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/shell.js
new file mode 100644
index 0000000000..05fecd6ef1
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/shell.js
@@ -0,0 +1,161 @@
+// GENERATED, DO NOT EDIT
+// file: testTypedArray.js
+// Copyright (C) 2015 André Bargull. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+description: |
+    Collection of functions used to assert the correctness of TypedArray objects.
+defines:
+  - floatArrayConstructors
+  - nonClampedIntArrayConstructors
+  - intArrayConstructors
+  - typedArrayConstructors
+  - TypedArray
+  - testWithTypedArrayConstructors
+  - nonAtomicsFriendlyTypedArrayConstructors
+  - testWithAtomicsFriendlyTypedArrayConstructors
+  - testWithNonAtomicsFriendlyTypedArrayConstructors
+  - testTypedArrayConversions
+---*/
+
+var floatArrayConstructors = [
+  Float64Array,
+  Float32Array
+];
+
+var nonClampedIntArrayConstructors = [
+  Int32Array,
+  Int16Array,
+  Int8Array,
+  Uint32Array,
+  Uint16Array,
+  Uint8Array
+];
+
+var intArrayConstructors = nonClampedIntArrayConstructors.concat([Uint8ClampedArray]);
+
+// Float16Array is a newer feature
+// adding it to this list unconditionally would cause implementations lacking it to fail every test which uses it
+if (typeof Float16Array !== 'undefined') {
+  floatArrayConstructors.push(Float16Array);
+}
+
+/**
+ * Array containing every non-bigint typed array constructor.
+ */
+
+var typedArrayConstructors = floatArrayConstructors.concat(intArrayConstructors);
+
+/**
+ * The %TypedArray% intrinsic constructor function.
+ */
+var TypedArray = Object.getPrototypeOf(Int8Array);
+
+/**
+ * Callback for testing a typed array constructor.
+ *
+ * @callback typedArrayConstructorCallback
+ * @param {Function} Constructor the constructor object to test with.
+ */
+
+/**
+ * Calls the provided function for every typed array constructor.
+ *
+ * @param {typedArrayConstructorCallback} f - the function to call for each typed array constructor.
+ * @param {Array} selected - An optional Array with filtered typed arrays
+ */
+function testWithTypedArrayConstructors(f, selected) {
+  var constructors = selected || typedArrayConstructors;
+  for (var i = 0; i < constructors.length; ++i) {
+    var constructor = constructors[i];
+    try {
+      f(constructor);
+    } catch (e) {
+      e.message += " (Testing with " + constructor.name + ".)";
+      throw e;
+    }
+  }
+}
+
+var nonAtomicsFriendlyTypedArrayConstructors = floatArrayConstructors.concat([Uint8ClampedArray]);
+/**
+ * Calls the provided function for every non-"Atomics Friendly" typed array constructor.
+ *
+ * @param {typedArrayConstructorCallback} f - the function to call for each typed array constructor.
+ * @param {Array} selected - An optional Array with filtered typed arrays
+ */
+function testWithNonAtomicsFriendlyTypedArrayConstructors(f) {
+  testWithTypedArrayConstructors(f, nonAtomicsFriendlyTypedArrayConstructors);
+}
+
+/**
+ * Calls the provided function for every "Atomics Friendly" typed array constructor.
+ *
+ * @param {typedArrayConstructorCallback} f - the function to call for each typed array constructor.
+ * @param {Array} selected - An optional Array with filtered typed arrays
+ */
+function testWithAtomicsFriendlyTypedArrayConstructors(f) {
+  testWithTypedArrayConstructors(f, [
+    Int32Array,
+    Int16Array,
+    Int8Array,
+    Uint32Array,
+    Uint16Array,
+    Uint8Array,
+  ]);
+}
+
+/**
+ * Helper for conversion operations on TypedArrays, the expected values
+ * properties are indexed in order to match the respective value for each
+ * TypedArray constructor
+ * @param  {Function} fn - the function to call for each constructor and value.
+ *                         will be called with the constructor, value, expected
+ *                         value, and a initial value that can be used to avoid
+ *                         a false positive with an equivalent expected value.
+ */
+function testTypedArrayConversions(byteConversionValues, fn) {
+  var values = byteConversionValues.values;
+  var expected = byteConversionValues.expected;
+
+  testWithTypedArrayConstructors(function(TA) {
+    var name = TA.name.slice(0, -5);
+
+    return values.forEach(function(value, index) {
+      var exp = expected[name][index];
+      var initial = 0;
+      if (exp === 0) {
+        initial = 1;
+      }
+      fn(TA, value, exp, initial);
+    });
+  });
+}
+
+/**
+ * Checks if the given argument is one of the float-based TypedArray constructors.
+ *
+ * @param {constructor} ctor - the value to check
+ * @returns {boolean}
+ */
+function isFloatTypedArrayConstructor(arg) {
+  return floatArrayConstructors.indexOf(arg) !== -1;
+}
+
+/**
+ * Determines the precision of the given float-based TypedArray constructor.
+ *
+ * @param {constructor} ctor - the value to check
+ * @returns {string} "half", "single", or "double" for Float16Array, Float32Array, and Float64Array respectively.
+ */
+function floatTypedArrayConstructorPrecision(FA) {
+  if (typeof Float16Array !== "undefined" && FA === Float16Array) {
+    return "half";
+  } else if (FA === Float32Array) {
+    return "single";
+  } else if (FA === Float64Array) {
+    return "double";
+  } else {
+    throw new Error("Malformed test - floatTypedArrayConstructorPrecision called with non-float TypedArray");
+  }
+}
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-1-1.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-1-1.js
new file mode 100644
index 0000000000..9c269a4238
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-1-1.js
@@ -0,0 +1,14 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: Array.prototype.reduceRight applied to undefined throws a TypeError
+---*/
+
+
+assert.throws(TypeError, function() {
+  Array.prototype.reduceRight.call(undefined);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-1-10.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-1-10.js
new file mode 100644
index 0000000000..7905eb1c06
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-1-10.js
@@ -0,0 +1,22 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: Array.prototype.reduceRight applied to the Math object
+---*/
+
+var accessed = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  accessed = true;
+  return '[object Math]' === Object.prototype.toString.call(obj);
+}
+
+Math.length = 1;
+Math[0] = 1;
+
+assert(Array.prototype.reduceRight.call(Math, callbackfn, 1), 'Array.prototype.reduceRight.call(Math, callbackfn, 1) !== true');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-1-11.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-1-11.js
new file mode 100644
index 0000000000..0b948bb5ed
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-1-11.js
@@ -0,0 +1,22 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: Array.prototype.reduceRight applied to Date object
+---*/
+
+var obj = new Date();
+obj.length = 1;
+obj[0] = 1;
+var accessed = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  accessed = true;
+  return obj instanceof Date;
+}
+
+assert(Array.prototype.reduceRight.call(obj, callbackfn, 1), 'Array.prototype.reduceRight.call(obj, callbackfn, 1) !== true');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-1-12.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-1-12.js
new file mode 100644
index 0000000000..6be9132c57
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-1-12.js
@@ -0,0 +1,22 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: Array.prototype.reduceRight applied to RegExp object
+---*/
+
+var obj = new RegExp();
+obj.length = 1;
+obj[0] = 1;
+var accessed = false;
+
+function callbackfn(prevVal, curVal, idx, o) {
+  accessed = true;
+  return o instanceof RegExp;
+}
+
+assert(Array.prototype.reduceRight.call(obj, callbackfn, 1), 'Array.prototype.reduceRight.call(obj, callbackfn, 1) !== true');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-1-13.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-1-13.js
new file mode 100644
index 0000000000..f3f39b22e8
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-1-13.js
@@ -0,0 +1,22 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: Array.prototype.reduceRight applied to the JSON object
+---*/
+
+var accessed = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  accessed = true;
+  return ('[object JSON]' === Object.prototype.toString.call(obj));
+}
+
+JSON.length = 1;
+JSON[0] = 1;
+
+assert(Array.prototype.reduceRight.call(JSON, callbackfn, 1), 'Array.prototype.reduceRight.call(JSON, callbackfn, 1) !== true');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-1-14.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-1-14.js
new file mode 100644
index 0000000000..fa4bd8446b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-1-14.js
@@ -0,0 +1,22 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: Array.prototype.reduceRight applied to Error object
+---*/
+
+var obj = new Error();
+obj.length = 1;
+obj[0] = 1;
+var accessed = false;
+
+function callbackfn(prevVal, curVal, idx, o) {
+  accessed = true;
+  return o instanceof Error;
+}
+
+assert(Array.prototype.reduceRight.call(obj, callbackfn, 1), 'Array.prototype.reduceRight.call(obj, callbackfn, 1) !== true');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-1-15.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-1-15.js
new file mode 100644
index 0000000000..459cc6b04c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-1-15.js
@@ -0,0 +1,23 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: Array.prototype.reduceRight applied to the Arguments object
+---*/
+
+var accessed = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  accessed = true;
+  return '[object Arguments]' === Object.prototype.toString.call(obj);
+}
+
+var obj = (function() {
+  return arguments;
+}("a", "b"));
+
+assert(Array.prototype.reduceRight.call(obj, callbackfn, "a"), 'Array.prototype.reduceRight.call(obj, callbackfn, "a") !== true');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-1-2.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-1-2.js
new file mode 100644
index 0000000000..dee59c432a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-1-2.js
@@ -0,0 +1,14 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: Array.prototype.reduceRight applied to null throws a TypeError
+---*/
+
+
+assert.throws(TypeError, function() {
+  Array.prototype.reduceRight.call(null);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-1-3.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-1-3.js
new file mode 100644
index 0000000000..e48a267504
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-1-3.js
@@ -0,0 +1,22 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: Array.prototype.reduceRight applied to boolean primitive
+---*/
+
+var accessed = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  accessed = true;
+  return obj instanceof Boolean;
+}
+
+Boolean.prototype[0] = 1;
+Boolean.prototype.length = 1;
+
+assert(Array.prototype.reduceRight.call(false, callbackfn, 1), 'Array.prototype.reduceRight.call(false, callbackfn, 1) !== true');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-1-4.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-1-4.js
new file mode 100644
index 0000000000..dce9cd7792
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-1-4.js
@@ -0,0 +1,23 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: Array.prototype.reduceRight applied to Boolean object
+---*/
+
+var obj = new Boolean(true);
+obj.length = 2;
+obj[0] = 11;
+obj[1] = 12;
+var accessed = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  accessed = true;
+  return obj instanceof Boolean;
+}
+
+assert(Array.prototype.reduceRight.call(obj, callbackfn, 11), 'Array.prototype.reduceRight.call(obj, callbackfn, 11) !== true');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-1-5.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-1-5.js
new file mode 100644
index 0000000000..232a748330
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-1-5.js
@@ -0,0 +1,22 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: Array.prototype.reduceRight applied to number primitive
+---*/
+
+var accessed = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  accessed = true;
+  return obj instanceof Number;
+}
+
+Number.prototype[0] = 1;
+Number.prototype.length = 1;
+
+assert(Array.prototype.reduceRight.call(2.5, callbackfn, 1), 'Array.prototype.reduceRight.call(2.5, callbackfn, 1) !== true');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-1-6.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-1-6.js
new file mode 100644
index 0000000000..baa0557021
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-1-6.js
@@ -0,0 +1,23 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: Array.prototype.reduceRight applied to Number object
+---*/
+
+var obj = new Number(-128);
+obj.length = 2;
+obj[0] = 11;
+obj[1] = 12;
+var accessed = false;
+
+function callbackfn(prevVal, curVal, idx, o) {
+  accessed = true;
+  return o instanceof Number;
+}
+
+assert(Array.prototype.reduceRight.call(obj, callbackfn, 11), 'Array.prototype.reduceRight.call(obj, callbackfn, 11) !== true');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-1-7.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-1-7.js
new file mode 100644
index 0000000000..e9330ba845
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-1-7.js
@@ -0,0 +1,19 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: Array.prototype.reduceRight applied to string primitive
+---*/
+
+var accessed = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  accessed = true;
+  return obj instanceof String;
+}
+
+assert(Array.prototype.reduceRight.call("hello\nworld\\!", callbackfn, "h"), 'Array.prototype.reduceRight.call("hello\nworld\\!", callbackfn, "h") !== true');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-1-8.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-1-8.js
new file mode 100644
index 0000000000..f8f2b6a480
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-1-8.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: Array.prototype.reduceRight applied to String object
+---*/
+
+var obj = new String("hello\nworld\\!");
+var accessed = false;
+
+function callbackfn(prevVal, curVal, idx, o) {
+  accessed = true;
+  return o instanceof String;
+}
+
+assert(Array.prototype.reduceRight.call(obj, callbackfn, "h"), 'Array.prototype.reduceRight.call(obj, callbackfn, "h") !== true');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-1-9.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-1-9.js
new file mode 100644
index 0000000000..94b7826729
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-1-9.js
@@ -0,0 +1,24 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: Array.prototype.reduceRight applied to Function object
+---*/
+
+var obj = function(a, b) {
+  return a + b;
+};
+obj[0] = 11;
+obj[1] = 9;
+var accessed = false;
+
+function callbackfn(prevVal, curVal, idx, o) {
+  accessed = true;
+  return o instanceof Function;
+}
+
+assert(Array.prototype.reduceRight.call(obj, callbackfn, 11), 'Array.prototype.reduceRight.call(obj, callbackfn, 11) !== true');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-10-1.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-10-1.js
new file mode 100644
index 0000000000..dee63bd94c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-10-1.js
@@ -0,0 +1,24 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight doesn't mutate the Array on which it
+    is called on
+---*/
+
+function callbackfn(prevVal, curVal, idx, obj)
+{
+  return 1;
+}
+var srcArr = [1, 2, 3, 4, 5];
+srcArr.reduceRight(callbackfn);
+
+assert.sameValue(srcArr[0], 1, 'srcArr[0]');
+assert.sameValue(srcArr[1], 2, 'srcArr[1]');
+assert.sameValue(srcArr[2], 3, 'srcArr[2]');
+assert.sameValue(srcArr[3], 4, 'srcArr[3]');
+assert.sameValue(srcArr[4], 5, 'srcArr[4]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-10-2.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-10-2.js
new file mode 100644
index 0000000000..b38e20a381
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-10-2.js
@@ -0,0 +1,19 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight reduces array in descending order of
+    indices
+---*/
+
+function callbackfn(prevVal, curVal, idx, obj)
+{
+  return prevVal + curVal;
+}
+var srcArr = ['1', '2', '3', '4', '5'];
+
+assert.sameValue(srcArr.reduceRight(callbackfn), '54321', 'srcArr.reduceRight(callbackfn)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-10-3.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-10-3.js
new file mode 100644
index 0000000000..f421482435
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-10-3.js
@@ -0,0 +1,18 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: Array.prototype.reduceRight - subclassed array with length 1
+---*/
+
+foo.prototype = [1];
+
+function foo() {}
+var f = new foo();
+
+function cb() {}
+
+assert.sameValue(f.reduceRight(cb), 1, 'f.reduceRight(cb)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-10-4.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-10-4.js
new file mode 100644
index 0000000000..ce6f0ef918
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-10-4.js
@@ -0,0 +1,22 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - subclassed array with length more
+    than 1
+---*/
+
+foo.prototype = new Array(0, 1, 2, 3);
+
+function foo() {}
+var f = new foo();
+
+function cb(prevVal, curVal, idx, obj) {
+  return prevVal + curVal;
+}
+
+assert.sameValue(f.reduceRight(cb), 6, 'f.reduceRight(cb)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-10-5.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-10-5.js
new file mode 100644
index 0000000000..4251a3228e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-10-5.js
@@ -0,0 +1,19 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight reduces array in descending order of
+    indices(initialvalue present)
+---*/
+
+function callbackfn(prevVal, curVal, idx, obj)
+{
+  return prevVal + curVal;
+}
+var srcArr = ['1', '2', '3', '4', '5'];
+
+assert.sameValue(srcArr.reduceRight(callbackfn, '6'), '654321', 'srcArr.reduceRight(callbackfn,"6")');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-10-6.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-10-6.js
new file mode 100644
index 0000000000..f087b40433
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-10-6.js
@@ -0,0 +1,22 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - subclassed array when initialvalue
+    provided
+---*/
+
+foo.prototype = new Array(0, 1, 2, 3);
+
+function foo() {}
+var f = new foo();
+
+function cb(prevVal, curVal, idx, obj) {
+  return prevVal + curVal;
+}
+
+assert.sameValue(f.reduceRight(cb, "4"), "43210", 'f.reduceRight(cb,"4")');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-10-7.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-10-7.js
new file mode 100644
index 0000000000..7cd5fac5c3
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-10-7.js
@@ -0,0 +1,22 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - subclassed array when length to 1
+    and initialvalue provided
+---*/
+
+foo.prototype = [1];
+
+function foo() {}
+var f = new foo();
+
+function cb(prevVal, curVal, idx, obj) {
+  return prevVal + curVal;
+}
+
+assert.sameValue(f.reduceRight(cb, "4"), "41", 'f.reduceRight(cb,"4")');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-10-8.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-10-8.js
new file mode 100644
index 0000000000..ab9a4f3ba5
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-10-8.js
@@ -0,0 +1,23 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: Array.prototype.reduceRight doesn't visit expandos
+---*/
+
+var callCnt = 0;
+
+function callbackfn(prevVal, curVal, idx, obj)
+{
+  callCnt++;
+}
+var srcArr = ['1', '2', '3', '4', '5'];
+srcArr["i"] = 10;
+srcArr[true] = 11;
+
+srcArr.reduceRight(callbackfn);
+
+assert.sameValue(callCnt, 4, 'callCnt');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-2-1.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-2-1.js
new file mode 100644
index 0000000000..21c379ab71
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-2-1.js
@@ -0,0 +1,27 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight applied to Array-like object, 'length'
+    is an own data property
+---*/
+
+var accessed = false;
+var obj = {
+  0: 12,
+  1: 11,
+  2: 9,
+  length: 2
+};
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  accessed = true;
+  return obj.length === 2;
+}
+
+assert(Array.prototype.reduceRight.call(obj, callbackfn, 11), 'Array.prototype.reduceRight.call(obj, callbackfn, 11) !== true');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-2-10.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-2-10.js
new file mode 100644
index 0000000000..619a08353d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-2-10.js
@@ -0,0 +1,40 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight applied to Array-like object, 'length'
+    is an inherited accessor property
+---*/
+
+var accessed = false;
+var Con = function() {};
+
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  accessed = true;
+  return obj.length === 2;
+}
+
+var proto = {};
+
+Object.defineProperty(proto, "length", {
+  get: function() {
+    return 2;
+  },
+  configurable: true
+});
+
+Con.prototype = proto;
+
+var child = new Con();
+child[0] = 12;
+child[1] = 11;
+child[2] = 9;
+
+
+assert(Array.prototype.reduceRight.call(child, callbackfn, 11), 'Array.prototype.reduceRight.call(child, callbackfn, 11) !== true');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-2-11.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-2-11.js
new file mode 100644
index 0000000000..007fb8ab76
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-2-11.js
@@ -0,0 +1,30 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight applied to Array-like object, 'length'
+    is an own accessor property without a get function
+---*/
+
+var accessed = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  accessed = true;
+  return typeof obj.length === "undefined";
+}
+
+var obj = {
+  0: 11,
+  1: 12
+};
+Object.defineProperty(obj, "length", {
+  set: function() {},
+  configurable: true
+});
+
+assert.sameValue(Array.prototype.reduceRight.call(obj, callbackfn, 111), 111, 'Array.prototype.reduceRight.call(obj, callbackfn, 111)');
+assert.sameValue(accessed, false, 'accessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-2-12.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-2-12.js
new file mode 100644
index 0000000000..e9c86d15e1
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-2-12.js
@@ -0,0 +1,38 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - 'length' is own accessor property
+    without a get function that overrides an inherited accessor
+    property
+---*/
+
+var accessed = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  accessed = true;
+  return typeof obj.length === "undefined";
+}
+
+Object.defineProperty(Object.prototype, "length", {
+  get: function() {
+    return 2;
+  },
+  configurable: true
+});
+
+var obj = {
+  0: 12,
+  1: 13
+};
+Object.defineProperty(obj, "length", {
+  set: function() {},
+  configurable: true
+});
+
+assert.sameValue(Array.prototype.reduceRight.call(obj, callbackfn, 11), 11, 'Array.prototype.reduceRight.call(obj, callbackfn, 11)');
+assert.sameValue(accessed, false, 'accessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-2-13.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-2-13.js
new file mode 100644
index 0000000000..c8541a1ee4
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-2-13.js
@@ -0,0 +1,34 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight applied to the Array-like object that
+    'length' is inherited accessor property without a get function
+---*/
+
+var accessed = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  accessed = true;
+  return curVal > 10;
+}
+
+var proto = {};
+Object.defineProperty(proto, "length", {
+  set: function() {},
+  configurable: true
+});
+
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+child[0] = 11;
+child[1] = 12;
+
+assert.sameValue(Array.prototype.reduceRight.call(child, callbackfn, 111), 111, 'Array.prototype.reduceRight.call(child, callbackfn, 111)');
+assert.sameValue(accessed, false, 'accessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-2-14.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-2-14.js
new file mode 100644
index 0000000000..1cada10464
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-2-14.js
@@ -0,0 +1,25 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight applied to the Array-like object that
+    'length' property doesn't exist
+---*/
+
+var obj = {
+  0: 11,
+  1: 12
+};
+var accessed = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  accessed = true;
+  return curVal > 10;
+}
+
+assert.sameValue(Array.prototype.reduceRight.call(obj, callbackfn, 111), 111, 'Array.prototype.reduceRight.call(obj, callbackfn, 111)');
+assert.sameValue(accessed, false, 'accessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-2-17.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-2-17.js
new file mode 100644
index 0000000000..d92f6f751f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-2-17.js
@@ -0,0 +1,27 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight applied to the Arguments object, which
+    implements its own property get method
+---*/
+
+var arg;
+var accessed = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  accessed = true;
+  return obj.length === 2;
+}
+
+var func = function(a, b) {
+  arg = arguments;
+  return Array.prototype.reduceRight.call(arguments, callbackfn, 11);
+};
+
+assert(func(12, 11), 'func(12, 11) !== true');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-2-18.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-2-18.js
new file mode 100644
index 0000000000..854ebd4655
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-2-18.js
@@ -0,0 +1,24 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight applied to String object, which
+    implements its own property get method
+---*/
+
+var accessed = false;
+var str = new String("432");
+
+function callbackfn(preVal, curVal, idx, obj) {
+  accessed = true;
+  return obj.length === 3;
+}
+
+String.prototype[3] = "1";
+
+assert(Array.prototype.reduceRight.call(str, callbackfn, 111), 'Array.prototype.reduceRight.call(str, callbackfn, 111) !== true');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-2-19.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-2-19.js
new file mode 100644
index 0000000000..22c3bf88b1
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-2-19.js
@@ -0,0 +1,27 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight applied to Function object, which
+    implements its own property get method
+---*/
+
+var accessed = false;
+var fun = function(a, b) {
+  return a + b;
+};
+fun[0] = 12;
+fun[1] = 11;
+fun[2] = 9;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  accessed = true;
+  return obj.length === 2;
+}
+
+assert(Array.prototype.reduceRight.call(fun, callbackfn, 11), 'Array.prototype.reduceRight.call(fun, callbackfn, 11) !== true');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-2-2.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-2-2.js
new file mode 100644
index 0000000000..9776353d22
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-2-2.js
@@ -0,0 +1,21 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - 'length' is own data property on an
+    Array
+---*/
+
+var accessed = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  accessed = true;
+  return obj.length === 2;
+}
+
+assert([12, 11].reduceRight(callbackfn, 11), '[12, 11].reduceRight(callbackfn, 11) !== true');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-2-3.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-2-3.js
new file mode 100644
index 0000000000..2c0b4a53d4
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-2-3.js
@@ -0,0 +1,34 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight applied to Array-like object, 'length'
+    is an own data property that overrides an inherited data property
+---*/
+
+var accessed = true;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  accessed = true;
+  return obj.length === 2;
+}
+
+var proto = {
+  length: 3
+};
+
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+child.length = 2;
+child[0] = 12;
+child[1] = 11;
+child[2] = 9;
+
+assert(Array.prototype.reduceRight.call(child, callbackfn), 'Array.prototype.reduceRight.call(child, callbackfn) !== true');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-2-4.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-2-4.js
new file mode 100644
index 0000000000..5fb88cd893
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-2-4.js
@@ -0,0 +1,25 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - 'length' is own data property that
+    overrides an inherited data property on an Array
+---*/
+
+var accessed = false;
+var arrProtoLen;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  accessed = true;
+  return obj.length === 2;
+}
+
+arrProtoLen = Array.prototype.length;
+Array.prototype.length = 0;
+
+assert([12, 11].reduceRight(callbackfn, 11), '[12, 11].reduceRight(callbackfn, 11) !== true');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-2-5.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-2-5.js
new file mode 100644
index 0000000000..a3198d3cf1
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-2-5.js
@@ -0,0 +1,42 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight applied to Array-like object, 'length'
+    is an own data property that overrides an inherited accessor
+    property
+---*/
+
+var accessed = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  accessed = true;
+  return obj.length === 2;
+}
+
+var proto = {};
+Object.defineProperty(proto, "length", {
+  get: function() {
+    return 3;
+  },
+  configurable: true
+});
+
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+Object.defineProperty(child, "length", {
+  value: 2,
+  configurable: true
+});
+child[0] = 12;
+child[1] = 11;
+child[2] = 9;
+
+assert(Array.prototype.reduceRight.call(child, callbackfn), 'Array.prototype.reduceRight.call(child, callbackfn) !== true');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-2-6.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-2-6.js
new file mode 100644
index 0000000000..b50278b5f5
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-2-6.js
@@ -0,0 +1,31 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight applied to Array-like object, 'length'
+    is an inherited data property
+---*/
+
+var accessed = false;
+var proto = {
+  length: 2
+};
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+child[0] = 12;
+child[1] = 11;
+child[2] = 9;
+
+function callbackfn1(prevVal, curVal, idx, obj) {
+  accessed = true;
+  return obj.length === 2;
+}
+
+assert(Array.prototype.reduceRight.call(child, callbackfn1, 11), 'Array.prototype.reduceRight.call(child, callbackfn1, 11) !== true');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-2-7.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-2-7.js
new file mode 100644
index 0000000000..3adc1d14e1
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-2-7.js
@@ -0,0 +1,32 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight applied to Array-like object, 'length'
+    is an own accessor property
+---*/
+
+var accessed = true;
+var obj = {};
+obj[0] = 12;
+obj[1] = 11;
+obj[2] = 9;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  accessed = true;
+  return obj.length === 2;
+}
+
+Object.defineProperty(obj, "length", {
+  get: function() {
+    return 2;
+  },
+  configurable: true
+});
+
+assert(Array.prototype.reduceRight.call(obj, callbackfn, 11), 'Array.prototype.reduceRight.call(obj, callbackfn, 11) !== true');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-2-8.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-2-8.js
new file mode 100644
index 0000000000..2e4e8c077b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-2-8.js
@@ -0,0 +1,42 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight applied to Array-like object, 'length'
+    is an own accessor property that overrides an inherited data
+    property
+---*/
+
+var accessed = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  accessed = true;
+  return obj.length === 2;
+}
+
+var proto = {
+  length: 3
+};
+
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+
+Object.defineProperty(child, "length", {
+  get: function() {
+    return 2;
+  },
+  configurable: true
+});
+
+child[0] = 12;
+child[1] = 11;
+child[2] = 9;
+
+assert(Array.prototype.reduceRight.call(child, callbackfn, 11), 'Array.prototype.reduceRight.call(child, callbackfn, 11) !== true');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-2-9.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-2-9.js
new file mode 100644
index 0000000000..33243422e0
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-2-9.js
@@ -0,0 +1,44 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight applied to Array-like object, 'length'
+    is an own accessor property that overrides an inherited accessor
+    property
+---*/
+
+var accessed = false;
+
+function callbackfn1(prevVal, curVal, idx, obj) {
+  accessed = true;
+  return obj.length === 2;
+}
+
+var proto = {};
+Object.defineProperty(proto, "length", {
+  get: function() {
+    return 3;
+  },
+  configurable: true
+});
+
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+Object.defineProperty(child, "length", {
+  get: function() {
+    return 2;
+  },
+  configurable: true
+});
+child[0] = 12;
+child[1] = 11;
+child[2] = 9;
+
+assert(Array.prototype.reduceRight.call(child, callbackfn1, 111), 'Array.prototype.reduceRight.call(child, callbackfn1, 111) !== true');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-3-1.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-3-1.js
new file mode 100644
index 0000000000..2299e595e8
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-3-1.js
@@ -0,0 +1,23 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: Array.prototype.reduceRight - value of 'length' is undefined
+---*/
+
+var accessed = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  accessed = true;
+}
+
+var obj = {
+  0: 9,
+  length: undefined
+};
+
+assert.sameValue(Array.prototype.reduceRight.call(obj, callbackfn, 1), 1, 'Array.prototype.reduceRight.call(obj, callbackfn, 1)');
+assert.sameValue(accessed, false, 'accessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-3-10.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-3-10.js
new file mode 100644
index 0000000000..cb8ad72632
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-3-10.js
@@ -0,0 +1,25 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - value of 'length' is a number (value
+    is NaN)
+---*/
+
+var accessed = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  accessed = true;
+}
+
+var obj = {
+  0: 9,
+  length: NaN
+};
+
+assert.sameValue(Array.prototype.reduceRight.call(obj, callbackfn, 1), 1, 'Array.prototype.reduceRight.call(obj, callbackfn, 1)');
+assert.sameValue(accessed, false, 'accessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-3-11.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-3-11.js
new file mode 100644
index 0000000000..68e2a98fd4
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-3-11.js
@@ -0,0 +1,37 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - value of 'length' is a string
+    containing a positive number
+---*/
+
+var testResult1 = true;
+var testResult2 = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx > 1) {
+    testResult1 = false;
+  }
+
+  if (idx === 1) {
+    testResult2 = true;
+  }
+  return false;
+}
+
+var obj = {
+  0: 12,
+  1: 11,
+  2: 9,
+  length: "2"
+};
+
+Array.prototype.reduceRight.call(obj, callbackfn, 1);
+
+assert(testResult1, 'testResult1 !== true');
+assert(testResult2, 'testResult2 !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-3-12.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-3-12.js
new file mode 100644
index 0000000000..e6162bf757
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-3-12.js
@@ -0,0 +1,37 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - value of 'length' is a string
+    containing a negative number
+---*/
+
+var testResult1 = true;
+var testResult2 = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx > 1) {
+    testResult1 = false;
+  }
+
+  if (idx === 1) {
+    testResult2 = true;
+  }
+  return false;
+}
+
+var obj = {
+  0: 11,
+  1: 12,
+  2: 9,
+  length: "-4294967294"
+};
+
+Array.prototype.reduceRight.call(obj, callbackfn, 1);
+
+assert(testResult1, 'testResult1 !== true');
+assert.sameValue(testResult2, false, 'testResult2');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-3-13.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-3-13.js
new file mode 100644
index 0000000000..7138726ceb
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-3-13.js
@@ -0,0 +1,37 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - value of 'length' is a string
+    containing a decimal number
+---*/
+
+var testResult1 = true;
+var testResult2 = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx > 1) {
+    testResult1 = false;
+  }
+
+  if (idx === 1) {
+    testResult2 = true;
+  }
+  return false;
+}
+
+var obj = {
+  0: 12,
+  1: 11,
+  2: 9,
+  length: "2.5"
+};
+
+Array.prototype.reduceRight.call(obj, callbackfn, 1);
+
+assert(testResult1, 'testResult1 !== true');
+assert(testResult2, 'testResult2 !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-3-14.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-3-14.js
new file mode 100644
index 0000000000..8653b74ac3
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-3-14.js
@@ -0,0 +1,25 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - value of 'length' is a string
+    containing -Infinity
+---*/
+
+var accessed2 = false;
+
+function callbackfn2(prevVal, curVal, idx, obj) {
+  accessed2 = true;
+}
+
+var obj2 = {
+  0: 9,
+  length: "-Infinity"
+};
+
+assert.sameValue(Array.prototype.reduceRight.call(obj2, callbackfn2, 2), 2, 'Array.prototype.reduceRight.call(obj2, callbackfn2, 2)');
+assert.sameValue(accessed2, false, 'accessed2');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-3-15.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-3-15.js
new file mode 100644
index 0000000000..02d1fc781f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-3-15.js
@@ -0,0 +1,37 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - value of 'length' is a string
+    containing an exponential number
+---*/
+
+var testResult1 = true;
+var testResult2 = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx > 1) {
+    testResult1 = false;
+  }
+
+  if (idx === 1) {
+    testResult2 = true;
+  }
+  return false;
+}
+
+var obj = {
+  0: 12,
+  1: 11,
+  2: 9,
+  length: "2E0"
+};
+
+Array.prototype.reduceRight.call(obj, callbackfn, 1);
+
+assert(testResult1, 'testResult1 !== true');
+assert(testResult2, 'testResult2 !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-3-16.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-3-16.js
new file mode 100644
index 0000000000..0cf82b8dc6
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-3-16.js
@@ -0,0 +1,37 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - value of 'length' is a string
+    containing a hex number
+---*/
+
+var testResult1 = true;
+var testResult2 = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx > 1) {
+    testResult1 = false;
+  }
+
+  if (idx === 1) {
+    testResult2 = true;
+  }
+  return false;
+}
+
+var obj = {
+  0: 12,
+  1: 11,
+  2: 9,
+  length: "0x0002"
+};
+
+Array.prototype.reduceRight.call(obj, callbackfn, 1);
+
+assert(testResult1, 'testResult1 !== true');
+assert(testResult2, 'testResult2 !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-3-17.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-3-17.js
new file mode 100644
index 0000000000..047e97796d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-3-17.js
@@ -0,0 +1,37 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - value of 'length' is a string
+    containing a number with leading zeros
+---*/
+
+var testResult1 = true;
+var testResult2 = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx > 1) {
+    testResult1 = false;
+  }
+
+  if (idx === 1) {
+    testResult2 = true;
+  }
+  return false;
+}
+
+var obj = {
+  0: 12,
+  1: 11,
+  2: 9,
+  length: "0002.00"
+};
+
+Array.prototype.reduceRight.call(obj, callbackfn, 1);
+
+assert(testResult1, 'testResult1 !== true');
+assert(testResult2, 'testResult2 !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-3-18.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-3-18.js
new file mode 100644
index 0000000000..86e87cc3c0
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-3-18.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - value of 'length' is a string that
+    can't convert to a number
+---*/
+
+var accessed = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  accessed = true;
+}
+
+var obj = {
+  0: 9,
+  1: 8,
+  length: "two"
+};
+
+assert.sameValue(Array.prototype.reduceRight.call(obj, callbackfn, 11), 11, 'Array.prototype.reduceRight.call(obj, callbackfn, 11)');
+assert.sameValue(accessed, false, 'accessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-3-19.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-3-19.js
new file mode 100644
index 0000000000..0ec7c0601e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-3-19.js
@@ -0,0 +1,50 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - value of 'length' is an object which
+    has an own toString method
+---*/
+
+var testResult1 = true;
+var testResult2 = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx > 1) {
+    testResult1 = false;
+  }
+
+  if (idx === 1) {
+    testResult2 = true;
+  }
+  return false;
+}
+
+var toStringAccessed = false;
+var obj = {
+  0: 12,
+  1: 11,
+  2: 9,
+  length: {
+    toString: function() {
+      toStringAccessed = true;
+      return '2';
+    }
+  }
+};
+
+// objects inherit the default valueOf() method from Object
+// that simply returns itself. Since the default valueOf() method
+// does not return a primitive value, ES next tries to convert the object
+// to a number by calling its toString() method and converting the
+// resulting string to a number.
+
+Array.prototype.reduceRight.call(obj, callbackfn, 1);
+
+assert(testResult1, 'testResult1 !== true');
+assert(testResult2, 'testResult2 !== true');
+assert(toStringAccessed, 'toStringAccessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-3-2.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-3-2.js
new file mode 100644
index 0000000000..a453b582b0
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-3-2.js
@@ -0,0 +1,25 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight applied to an Array-like object,
+    'length' is 0 (length overridden to false(type conversion))
+---*/
+
+var accessed = false;
+
+function callbackfn(preVal, curVal, idx, obj) {
+  accessed = true;
+}
+
+var obj = {
+  0: 9,
+  length: false
+};
+
+assert.sameValue(Array.prototype.reduceRight.call(obj, callbackfn, 1), 1, 'Array.prototype.reduceRight.call(obj, callbackfn, 1)');
+assert.sameValue(accessed, false, 'accessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-3-20.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-3-20.js
new file mode 100644
index 0000000000..3d695cee0c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-3-20.js
@@ -0,0 +1,45 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - value of 'length' is an Object which
+    has an own valueOf method
+---*/
+
+var testResult1 = true;
+var testResult2 = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx > 1) {
+    testResult1 = false;
+  }
+
+  if (idx === 1) {
+    testResult2 = true;
+  }
+  return false;
+}
+
+var valueOfAccessed = false;
+
+var obj = {
+  0: 12,
+  1: 11,
+  2: 9,
+  length: {
+    valueOf: function() {
+      valueOfAccessed = true;
+      return 2;
+    }
+  }
+};
+
+Array.prototype.reduceRight.call(obj, callbackfn, 1);
+
+assert(testResult1, 'testResult1 !== true');
+assert(testResult2, 'testResult2 !== true');
+assert(valueOfAccessed, 'valueOfAccessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-3-21.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-3-21.js
new file mode 100644
index 0000000000..87c240ee83
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-3-21.js
@@ -0,0 +1,52 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - 'length' is an object that has an
+    own valueOf method that returns an object and toString method that
+    returns a string
+---*/
+
+var testResult1 = true;
+var testResult2 = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx > 1) {
+    testResult1 = false;
+  }
+
+  if (idx === 1) {
+    testResult2 = true;
+  }
+  return false;
+}
+
+var toStringAccessed = false;
+var valueOfAccessed = false;
+
+var obj = {
+  0: 12,
+  1: 11,
+  2: 9,
+  length: {
+    valueOf: function() {
+      valueOfAccessed = true;
+      return {};
+    },
+    toString: function() {
+      toStringAccessed = true;
+      return '2';
+    }
+  }
+};
+
+Array.prototype.reduceRight.call(obj, callbackfn, 1);
+
+assert(testResult1, 'testResult1 !== true');
+assert(testResult2, 'testResult2 !== true');
+assert(valueOfAccessed, 'valueOfAccessed !== true');
+assert(toStringAccessed, 'toStringAccessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-3-22.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-3-22.js
new file mode 100644
index 0000000000..aa05079f85
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-3-22.js
@@ -0,0 +1,42 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight throws TypeError exception when
+    'length' is an object with toString and valueOf methods that don�t
+    return primitive values
+---*/
+
+var accessed = false;
+var toStringAccessed = false;
+var valueOfAccessed = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  accessed = true;
+}
+
+var obj = {
+  0: 11,
+  1: 12,
+
+  length: {
+    valueOf: function() {
+      valueOfAccessed = true;
+      return {};
+    },
+    toString: function() {
+      toStringAccessed = true;
+      return {};
+    }
+  }
+};
+assert.throws(TypeError, function() {
+  Array.prototype.reduceRight.call(obj, callbackfn, 1);
+});
+assert(toStringAccessed, 'toStringAccessed !== true');
+assert(valueOfAccessed, 'valueOfAccessed !== true');
+assert.sameValue(accessed, false, 'accessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-3-23.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-3-23.js
new file mode 100644
index 0000000000..204dea1c09
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-3-23.js
@@ -0,0 +1,57 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight uses inherited valueOf method when
+    'length' is an object with an own toString and inherited valueOf
+    methods
+---*/
+
+var testResult1 = true;
+var testResult2 = false;
+var valueOfAccessed = false;
+var toStringAccessed = false;
+
+var proto = {
+  valueOf: function() {
+    valueOfAccessed = true;
+    return 2;
+  }
+};
+var Con = function() {};
+Con.prototype = proto;
+var child = new Con();
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx > 1) {
+    testResult1 = false;
+  }
+
+  if (idx === 1) {
+    testResult2 = true;
+  }
+  return false;
+}
+
+child.toString = function() {
+  toStringAccessed = true;
+  return '1';
+};
+
+var obj = {
+  0: 12,
+  1: 11,
+  2: 9,
+  length: child
+};
+
+Array.prototype.reduceRight.call(obj, callbackfn, 1);
+
+assert(testResult1, 'testResult1 !== true');
+assert(testResult2, 'testResult2 !== true');
+assert(valueOfAccessed, 'valueOfAccessed !== true');
+assert.sameValue(toStringAccessed, false, 'toStringAccessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-3-24.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-3-24.js
new file mode 100644
index 0000000000..37b8be87ca
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-3-24.js
@@ -0,0 +1,37 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - value of 'length' is a positive
+    non-integer, ensure truncation occurs in the proper direction
+---*/
+
+var testResult1 = true;
+var testResult2 = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx > 1) {
+    testResult1 = false;
+  }
+
+  if (idx === 1) {
+    testResult2 = true;
+  }
+  return false;
+}
+
+var obj = {
+  0: 12,
+  1: 11,
+  2: 9,
+  length: 2.685
+};
+
+Array.prototype.reduceRight.call(obj, callbackfn, 1);
+
+assert(testResult1, 'testResult1 !== true');
+assert(testResult2, 'testResult2 !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-3-25.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-3-25.js
new file mode 100644
index 0000000000..75436008af
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-3-25.js
@@ -0,0 +1,37 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - value of 'length' is a negative
+    non-integer
+---*/
+
+var testResult1 = true;
+var testResult2 = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx > 1) {
+    testResult1 = false;
+  }
+
+  if (idx === 1) {
+    testResult2 = true;
+  }
+  return false;
+}
+
+var obj = {
+  0: 12,
+  1: 11,
+  2: 9,
+  length: -4294967294.5
+};
+
+Array.prototype.reduceRight.call(obj, callbackfn, 1);
+
+assert(testResult1, 'testResult1 !== true');
+assert.sameValue(testResult2, false, 'testResult2');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-3-3.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-3-3.js
new file mode 100644
index 0000000000..d7c809db8a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-3-3.js
@@ -0,0 +1,25 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - value of 'length' is a number (value
+    is 0)
+---*/
+
+var accessed = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  accessed = true;
+}
+
+var obj = {
+  0: 9,
+  length: 0
+};
+
+assert.sameValue(Array.prototype.reduceRight.call(obj, callbackfn, 1), 1, 'Array.prototype.reduceRight.call(obj, callbackfn, 1)');
+assert.sameValue(accessed, false, 'accessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-3-4.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-3-4.js
new file mode 100644
index 0000000000..bab110a9f8
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-3-4.js
@@ -0,0 +1,25 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - value of 'length' is a number (value
+    is +0)
+---*/
+
+var accessed = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  accessed = true;
+}
+
+var obj = {
+  0: 9,
+  length: +0
+};
+
+assert.sameValue(Array.prototype.reduceRight.call(obj, callbackfn, 1), 1, 'Array.prototype.reduceRight.call(obj, callbackfn, 1)');
+assert.sameValue(accessed, false, 'accessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-3-5.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-3-5.js
new file mode 100644
index 0000000000..432697a489
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-3-5.js
@@ -0,0 +1,25 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - value of 'length' is a number (value
+    is -0)
+---*/
+
+var accessed = false;
+
+function callbackfn(preVal, curVal, idx, obj) {
+  accessed = true;
+}
+
+var obj = {
+  0: 9,
+  length: -0
+};
+
+assert.sameValue(Array.prototype.reduceRight.call(obj, callbackfn, 1), 1, 'Array.prototype.reduceRight.call(obj, callbackfn, 1)');
+assert.sameValue(accessed, false, 'accessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-3-6.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-3-6.js
new file mode 100644
index 0000000000..a2af8a433c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-3-6.js
@@ -0,0 +1,36 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - value of 'length' is a number (value
+    is positive)
+---*/
+
+var testResult1 = true;
+var testResult2 = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx > 1) {
+    testResult1 = false;
+  }
+
+  if (idx === 1) {
+    testResult2 = true;
+  }
+  return false;
+}
+
+var obj = {
+  1: 11,
+  2: 9,
+  length: 2
+};
+
+Array.prototype.reduceRight.call(obj, callbackfn, 1);
+
+assert(testResult1, 'testResult1 !== true');
+assert(testResult2, 'testResult2 !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-3-7.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-3-7.js
new file mode 100644
index 0000000000..4b970f249d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-3-7.js
@@ -0,0 +1,36 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - value of 'length' is a number (value
+    is negative)
+---*/
+
+var testResult1 = true;
+var testResult2 = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx > 1) {
+    testResult1 = false;
+  }
+
+  if (idx === 1) {
+    testResult2 = true;
+  }
+  return false;
+}
+
+var obj = {
+  1: 11,
+  2: 9,
+  length: -4294967294
+};
+
+Array.prototype.reduceRight.call(obj, callbackfn, 1);
+
+assert(testResult1, 'testResult1 !== true');
+assert.sameValue(testResult2, false, 'testResult2');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-3-9.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-3-9.js
new file mode 100644
index 0000000000..6ffe23eb95
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-3-9.js
@@ -0,0 +1,25 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - value of 'length' is a number (value
+    is -Infinity)
+---*/
+
+var accessed = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  accessed = true;
+}
+
+var obj = {
+  0: 9,
+  length: -Infinity
+};
+
+assert.sameValue(Array.prototype.reduceRight.call(obj, callbackfn, 1), 1, 'Array.prototype.reduceRight.call(obj, callbackfn, 1)');
+assert.sameValue(accessed, false, 'accessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-4-1.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-4-1.js
new file mode 100644
index 0000000000..b7d5adfa00
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-4-1.js
@@ -0,0 +1,16 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight throws TypeError if callbackfn is
+    undefined
+---*/
+
+var arr = new Array(10);
+assert.throws(TypeError, function() {
+  arr.reduceRight();
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-4-10.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-4-10.js
new file mode 100644
index 0000000000..61327dcc6f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-4-10.js
@@ -0,0 +1,27 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - the exception is not thrown if
+    exception was thrown by step 2
+---*/
+
+var obj = {
+  0: 11,
+  1: 12
+};
+
+Object.defineProperty(obj, "length", {
+  get: function() {
+    throw new Test262Error();
+  },
+  configurable: true
+});
+
+assert.throws(Test262Error, function() {
+  Array.prototype.reduceRight.call(obj, undefined);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-4-11.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-4-11.js
new file mode 100644
index 0000000000..e7b0271061
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-4-11.js
@@ -0,0 +1,31 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - the exception is not thrown if
+    exception was thrown by step 3
+---*/
+
+var obj = {
+  0: 11,
+  1: 12
+};
+
+Object.defineProperty(obj, "length", {
+  get: function() {
+    return {
+      toString: function() {
+        throw new Test262Error();
+      }
+    };
+  },
+  configurable: true
+});
+
+assert.throws(Test262Error, function() {
+  Array.prototype.reduceRight.call(obj, undefined);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-4-12.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-4-12.js
new file mode 100644
index 0000000000..341f626254
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-4-12.js
@@ -0,0 +1,18 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: Array.prototype.reduceRight - 'callbackfn' is a function
+---*/
+
+var initialValue = 0;
+
+function callbackfn(accum, val, idx, obj) {
+  accum += val;
+  return accum;
+}
+
+assert.sameValue([11, 9].reduceRight(callbackfn, initialValue), 20, '[11, 9].reduceRight(callbackfn, initialValue)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-4-15.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-4-15.js
new file mode 100644
index 0000000000..d5a7ace182
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-4-15.js
@@ -0,0 +1,37 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - calling with no callbackfn is the
+    same as passing undefined for callbackfn
+---*/
+
+var obj = {
+  10: 10
+};
+var lengthAccessed = false;
+var loopAccessed = false;
+
+Object.defineProperty(obj, "length", {
+  get: function() {
+    lengthAccessed = true;
+    return 20;
+  },
+  configurable: true
+});
+Object.defineProperty(obj, "0", {
+  get: function() {
+    loopAccessed = true;
+    return 10;
+  },
+  configurable: true
+});
+assert.throws(TypeError, function() {
+  Array.prototype.reduceRight.call(obj, undefined);
+});
+assert(lengthAccessed, 'lengthAccessed !== true');
+assert.sameValue(loopAccessed, false, 'loopAccessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-4-2.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-4-2.js
new file mode 100644
index 0000000000..7b54f582a9
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-4-2.js
@@ -0,0 +1,16 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight throws ReferenceError if callbackfn is
+    unreferenced
+---*/
+
+var arr = new Array(10);
+assert.throws(ReferenceError, function() {
+  arr.reduceRight(foo);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-4-3.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-4-3.js
new file mode 100644
index 0000000000..d8a0c1c694
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-4-3.js
@@ -0,0 +1,14 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: Array.prototype.reduceRight throws TypeError if callbackfn is null
+---*/
+
+var arr = new Array(10);
+assert.throws(TypeError, function() {
+  arr.reduceRight(null);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-4-4.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-4-4.js
new file mode 100644
index 0000000000..10db83a146
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-4-4.js
@@ -0,0 +1,16 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight throws TypeError if callbackfn is
+    boolean
+---*/
+
+var arr = new Array(10);
+assert.throws(TypeError, function() {
+  arr.reduceRight(true);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-4-5.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-4-5.js
new file mode 100644
index 0000000000..37e336c570
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-4-5.js
@@ -0,0 +1,16 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight throws TypeError if callbackfn is
+    number
+---*/
+
+var arr = new Array(10);
+assert.throws(TypeError, function() {
+  arr.reduceRight(5);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-4-6.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-4-6.js
new file mode 100644
index 0000000000..f778d63df1
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-4-6.js
@@ -0,0 +1,16 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight throws TypeError if callbackfn is
+    string
+---*/
+
+var arr = new Array(10);
+assert.throws(TypeError, function() {
+  arr.reduceRight("abc");
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-4-7.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-4-7.js
new file mode 100644
index 0000000000..2bc4dab198
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-4-7.js
@@ -0,0 +1,16 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight throws TypeError if callbackfn is
+    Object without [[Call]] internal method
+---*/
+
+var arr = new Array(10);
+assert.throws(TypeError, function() {
+  arr.reduceRight(new Object());
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-4-8.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-4-8.js
new file mode 100644
index 0000000000..25f395572d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-4-8.js
@@ -0,0 +1,30 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - side effects produced by step 2 are
+    visible when an exception occurs
+---*/
+
+var obj = {
+  0: 11,
+  1: 12
+};
+
+var accessed = false;
+
+Object.defineProperty(obj, "length", {
+  get: function() {
+    accessed = true;
+    return 2;
+  },
+  configurable: true
+});
+assert.throws(TypeError, function() {
+  Array.prototype.reduceRight.call(obj, null);
+});
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-4-9.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-4-9.js
new file mode 100644
index 0000000000..d04effce90
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-4-9.js
@@ -0,0 +1,34 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - side effects produced by step 3 are
+    visible when an exception occurs
+---*/
+
+var obj = {
+  0: 11,
+  1: 12
+};
+
+var accessed = false;
+
+Object.defineProperty(obj, "length", {
+  get: function() {
+    return {
+      toString: function() {
+        accessed = true;
+        return "2";
+      }
+    };
+  },
+  configurable: true
+});
+assert.throws(TypeError, function() {
+  Array.prototype.reduceRight.call(obj, null);
+});
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-5-1.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-5-1.js
new file mode 100644
index 0000000000..a0ae5e668a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-5-1.js
@@ -0,0 +1,16 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight throws TypeError if 'length' is 0
+    (empty array), no initVal
+---*/
+
+function cb() {}
+assert.throws(TypeError, function() {
+  [].reduceRight(cb);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-5-10.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-5-10.js
new file mode 100644
index 0000000000..ccd326be93
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-5-10.js
@@ -0,0 +1,30 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - side-effects produced by step 2 when
+    an exception occurs
+---*/
+
+var obj = {
+  0: 11,
+  1: 12
+};
+
+var accessed = false;
+
+Object.defineProperty(obj, "length", {
+  get: function() {
+    accessed = true;
+    return 0;
+  },
+  configurable: true
+});
+assert.throws(TypeError, function() {
+  Array.prototype.reduceRight.call(obj, function() {});
+});
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-5-11.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-5-11.js
new file mode 100644
index 0000000000..bf27af3453
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-5-11.js
@@ -0,0 +1,34 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - side-effects produced by step 3 when
+    an exception occurs
+---*/
+
+var obj = {
+  0: 11,
+  1: 12
+};
+
+var accessed = false;
+
+Object.defineProperty(obj, "length", {
+  get: function() {
+    return {
+      toString: function() {
+        accessed = true;
+        return "0";
+      }
+    };
+  },
+  configurable: true
+});
+assert.throws(TypeError, function() {
+  Array.prototype.reduceRight.call(obj, function() {});
+});
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-5-12.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-5-12.js
new file mode 100644
index 0000000000..d839266b6f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-5-12.js
@@ -0,0 +1,27 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - the exception is not thrown if
+    exception was thrown by step 2
+---*/
+
+var obj = {
+  0: 11,
+  1: 12
+};
+
+Object.defineProperty(obj, "length", {
+  get: function() {
+    throw new Test262Error();
+  },
+  configurable: true
+});
+
+assert.throws(Test262Error, function() {
+  Array.prototype.reduceRight.call(obj, function() {});
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-5-13.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-5-13.js
new file mode 100644
index 0000000000..5b87a6363e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-5-13.js
@@ -0,0 +1,31 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - the exception is not thrown if
+    exception was thrown by step 3
+---*/
+
+var obj = {
+  0: 11,
+  1: 12
+};
+
+Object.defineProperty(obj, "length", {
+  get: function() {
+    return {
+      toString: function() {
+        throw new Test262Error();
+      }
+    };
+  },
+  configurable: true
+});
+
+assert.throws(Test262Error, function() {
+  Array.prototype.reduceRight.call(obj, function() {});
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-5-2.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-5-2.js
new file mode 100644
index 0000000000..8aae3aef48
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-5-2.js
@@ -0,0 +1,23 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight throws TypeError if 'length' is 0
+    (subclassed Array, length overridden to null (type conversion)),
+    no initVal
+---*/
+
+foo.prototype = new Array(1, 2, 3);
+
+function foo() {}
+var f = new foo();
+f.length = null;
+
+function cb() {}
+assert.throws(TypeError, function() {
+  f.reduceRight(cb);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-5-3.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-5-3.js
new file mode 100644
index 0000000000..ace1c67616
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-5-3.js
@@ -0,0 +1,23 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight throws TypeError if 'length' is 0
+    (subclassed Array, length overridden to false (type conversion)),
+    no initVal
+---*/
+
+foo.prototype = new Array(1, 2, 3);
+
+function foo() {}
+var f = new foo();
+f.length = false;
+
+function cb() {}
+assert.throws(TypeError, function() {
+  f.reduceRight(cb);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-5-4.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-5-4.js
new file mode 100644
index 0000000000..b63b28ac44
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-5-4.js
@@ -0,0 +1,23 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight throws TypeError if 'length' is 0
+    (subclassed Array, length overridden to 0 (type conversion)), no
+    initVal
+---*/
+
+foo.prototype = new Array(1, 2, 3);
+
+function foo() {}
+var f = new foo();
+f.length = 0;
+
+function cb() {}
+assert.throws(TypeError, function() {
+  f.reduceRight(cb);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-5-5.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-5-5.js
new file mode 100644
index 0000000000..dad1c9abf1
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-5-5.js
@@ -0,0 +1,23 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight throws TypeError if 'length' is 0
+    (subclassed Array, length overridden to '0' (type conversion)), no
+    initVal
+---*/
+
+foo.prototype = new Array(1, 2, 3);
+
+function foo() {}
+var f = new foo();
+f.length = '0';
+
+function cb() {}
+assert.throws(TypeError, function() {
+  f.reduceRight(cb);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-5-6.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-5-6.js
new file mode 100644
index 0000000000..becfb0d732
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-5-6.js
@@ -0,0 +1,29 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight throws TypeError if 'length' is 0
+    (subclassed Array, length overridden with obj with valueOf), no
+    initVal
+---*/
+
+foo.prototype = new Array(1, 2, 3);
+
+function foo() {}
+var f = new foo();
+
+var o = {
+  valueOf: function() {
+    return 0;
+  }
+};
+f.length = o;
+
+function cb() {}
+assert.throws(TypeError, function() {
+  f.reduceRight(cb);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-5-7.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-5-7.js
new file mode 100644
index 0000000000..80b9595899
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-5-7.js
@@ -0,0 +1,35 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight throws TypeError if 'length' is 0
+    (subclassed Array, length overridden with obj w/o valueOf
+    (toString)), no initVal
+---*/
+
+foo.prototype = new Array(1, 2, 3);
+
+function foo() {}
+var f = new foo();
+
+var o = {
+  toString: function() {
+    return '0';
+  }
+};
+f.length = o;
+
+// objects inherit the default valueOf method of the Object object;
+// that simply returns the itself. Since the default valueOf() method
+// does not return a primitive value, ES next tries to convert the object
+// to a number by calling its toString() method and converting the
+// resulting string to a number.
+
+function cb() {}
+assert.throws(TypeError, function() {
+  f.reduceRight(cb);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-5-8.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-5-8.js
new file mode 100644
index 0000000000..91a471070e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-5-8.js
@@ -0,0 +1,37 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight throws TypeError if 'length' is 0
+    (subclassed Array, length overridden with []), no initVal
+---*/
+
+foo.prototype = new Array(1, 2, 3);
+
+function foo() {}
+var f = new foo();
+
+f.length = [];
+
+// objects inherit the default valueOf method of the Object object;
+// that simply returns the itself. Since the default valueOf() method
+// does not return a primitive value, ES next tries to convert the object
+// to a number by calling its toString() method and converting the
+// resulting string to a number.
+//
+// The toString( ) method on Array converts the array elements to strings,
+// then returns the result of concatenating these strings, with commas in
+// between. An array with no elements converts to the empty string, which
+// converts to the number 0. If an array has a single element that is a
+// number n, the array converts to a string representation of n, which is
+// then converted back to n itself. If an array contains more than one element,
+// or if its one element is not a number, the array converts to NaN.
+
+function cb() {}
+assert.throws(TypeError, function() {
+  f.reduceRight(cb);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-5-9.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-5-9.js
new file mode 100644
index 0000000000..4cb8f44197
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-5-9.js
@@ -0,0 +1,15 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - 'initialValue' is returned if 'len'
+    is 0 and 'initialValue' is present
+---*/
+
+var initialValue = 10;
+
+assert.sameValue([].reduceRight(function() {}, initialValue), initialValue, '[].reduceRight(function () { }, initialValue)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-7-1.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-7-1.js
new file mode 100644
index 0000000000..7d55035484
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-7-1.js
@@ -0,0 +1,14 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight returns initialValue if 'length' is 0
+    and initialValue is present (empty array)
+---*/
+
+function cb() {}
+assert.sameValue([].reduceRight(cb, 1), 1, '[].reduceRight(cb,1)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-7-10.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-7-10.js
new file mode 100644
index 0000000000..10cd502700
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-7-10.js
@@ -0,0 +1,13 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: Array.prototype.reduceRight - 'initialValue' is present
+---*/
+
+var str = "initialValue is present";
+
+assert.sameValue([].reduceRight(function() {}, str), str, '[].reduceRight(function () { }, str)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-7-11.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-7-11.js
new file mode 100644
index 0000000000..d80d9ae212
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-7-11.js
@@ -0,0 +1,13 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: Array.prototype.reduceRight - 'initialValue' is not present
+---*/
+
+var str = "initialValue is not present";
+
+assert.sameValue([str].reduceRight(function() {}), str, '[str].reduceRight(function () { })');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-7-2.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-7-2.js
new file mode 100644
index 0000000000..f1e13bba46
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-7-2.js
@@ -0,0 +1,21 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight returns initialValue if 'length' is 0
+    and initialValue is present (subclassed Array, length overridden
+    to null (type conversion))
+---*/
+
+foo.prototype = new Array(1, 2, 3);
+
+function foo() {}
+var f = new foo();
+f.length = null;
+
+function cb() {}
+assert.sameValue(f.reduceRight(cb, 1), 1, 'f.reduceRight(cb,1)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-7-3.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-7-3.js
new file mode 100644
index 0000000000..8f6ee65bd9
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-7-3.js
@@ -0,0 +1,21 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight returns initialValue if 'length' is 0
+    and initialValue is present (subclassed Array, length overridden
+    to false (type conversion))
+---*/
+
+foo.prototype = new Array(1, 2, 3);
+
+function foo() {}
+var f = new foo();
+f.length = false;
+
+function cb() {}
+assert.sameValue(f.reduceRight(cb, 1), 1, 'f.reduceRight(cb,1)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-7-4.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-7-4.js
new file mode 100644
index 0000000000..152016a8ca
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-7-4.js
@@ -0,0 +1,21 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight returns initialValue if 'length' is 0
+    and initialValue is present (subclassed Array, length overridden
+    to 0 (type conversion))
+---*/
+
+foo.prototype = new Array(1, 2, 3);
+
+function foo() {}
+var f = new foo();
+f.length = 0;
+
+function cb() {}
+assert.sameValue(f.reduceRight(cb, 1), 1, 'f.reduceRight(cb,1)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-7-5.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-7-5.js
new file mode 100644
index 0000000000..72ccb1ceec
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-7-5.js
@@ -0,0 +1,21 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight returns initialValue if 'length' is 0
+    and initialValue is present (subclassed Array, length overridden
+    to '0' (type conversion))
+---*/
+
+foo.prototype = new Array(1, 2, 3);
+
+function foo() {}
+var f = new foo();
+f.length = '0';
+
+function cb() {}
+assert.sameValue(f.reduceRight(cb, 1), 1, 'f.reduceRight(cb,1)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-7-6.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-7-6.js
new file mode 100644
index 0000000000..98a4dcdf32
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-7-6.js
@@ -0,0 +1,27 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight returns initialValue if 'length' is 0
+    and initialValue is present (subclassed Array, length overridden
+    with obj with valueOf)
+---*/
+
+foo.prototype = new Array(1, 2, 3);
+
+function foo() {}
+var f = new foo();
+
+var o = {
+  valueOf: function() {
+    return 0;
+  }
+};
+f.length = o;
+
+function cb() {}
+assert.sameValue(f.reduceRight(cb, 1), 1, 'f.reduceRight(cb,1)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-7-7.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-7-7.js
new file mode 100644
index 0000000000..07c449a76f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-7-7.js
@@ -0,0 +1,33 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight returns initialValue if 'length' is 0
+    and initialValue is present (subclassed Array, length overridden
+    with obj w/o valueOf (toString))
+---*/
+
+foo.prototype = new Array(1, 2, 3);
+
+function foo() {}
+var f = new foo();
+
+var o = {
+  toString: function() {
+    return '0';
+  }
+};
+f.length = o;
+
+// objects inherit the default valueOf method of the Object object;
+// that simply returns the itself. Since the default valueOf() method
+// does not return a primitive value, ES next tries to convert the object
+// to a number by calling its toString() method and converting the
+// resulting string to a number.
+
+function cb() {}
+assert.sameValue(f.reduceRight(cb, 1), 1, 'f.reduceRight(cb,1)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-7-8.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-7-8.js
new file mode 100644
index 0000000000..6ec5e26cb7
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-7-8.js
@@ -0,0 +1,36 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight returns initialValue if 'length' is 0
+    and initialValue is present (subclassed Array, length overridden
+    with [])
+---*/
+
+foo.prototype = new Array(1, 2, 3);
+
+function foo() {}
+var f = new foo();
+
+f.length = [];
+
+// objects inherit the default valueOf method of the Object object;
+// that simply returns the itself. Since the default valueOf() method
+// does not return a primitive value, ES next tries to convert the object
+// to a number by calling its toString() method and converting the
+// resulting string to a number.
+//
+// The toString( ) method on Array converts the array elements to strings,
+// then returns the result of concatenating these strings, with commas in
+// between. An array with no elements converts to the empty string, which
+// converts to the number 0. If an array has a single element that is a
+// number n, the array converts to a string representation of n, which is
+// then converted back to n itself. If an array contains more than one element,
+// or if its one element is not a number, the array converts to NaN.
+
+function cb() {}
+assert.sameValue(f.reduceRight(cb, 1), 1, 'f.reduceRight(cb,1)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-7-9.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-7-9.js
new file mode 100644
index 0000000000..78ff13ba5b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-7-9.js
@@ -0,0 +1,36 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight returns initialValue if 'length' is 0
+    and initialValue is present (subclassed Array, length overridden
+    with [0])
+---*/
+
+foo.prototype = new Array(1, 2, 3);
+
+function foo() {}
+var f = new foo();
+
+f.length = [0];
+
+// objects inherit the default valueOf method of the Object object;
+// that simply returns the itself. Since the default valueOf() method
+// does not return a primitive value, ES next tries to convert the object
+// to a number by calling its toString() method and converting the
+// resulting string to a number.
+//
+// The toString( ) method on Array converts the array elements to strings,
+// then returns the result of concatenating these strings, with commas in
+// between. An array with no elements converts to the empty string, which
+// converts to the number 0. If an array has a single element that is a
+// number n, the array converts to a string representation of n, which is
+// then converted back to n itself. If an array contains more than one element,
+// or if its one element is not a number, the array converts to NaN.
+
+function cb() {}
+assert.sameValue(f.reduceRight(cb, 1), 1, 'f.reduceRight(cb,1)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-8-b-1.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-8-b-1.js
new file mode 100644
index 0000000000..c75994b87b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-8-b-1.js
@@ -0,0 +1,31 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - no observable effects occur if 'len'
+    is 0
+---*/
+
+var accessed = false;
+
+var obj = {
+  length: 0
+};
+
+Object.defineProperty(obj, "0", {
+  get: function() {
+    accessed = true;
+    return 10;
+  },
+  configurable: true
+});
+
+assert.throws(TypeError, function() {
+  Array.prototype.reduceRight.call(obj, function() {});
+});
+
+assert.sameValue(accessed, false, 'accessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-8-b-2.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-8-b-2.js
new file mode 100644
index 0000000000..4c86d36955
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-8-b-2.js
@@ -0,0 +1,32 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - modifications to length don't change
+    number of iterations in step 9
+---*/
+
+var called = 0;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  called++;
+  return prevVal + curVal;
+}
+
+var arr = [0, 1, 2, 3];
+Object.defineProperty(arr, "4", {
+  get: function() {
+    arr.length = 2;
+    return 10;
+  },
+  configurable: true
+});
+
+var preVal = arr.reduceRight(callbackfn);
+
+assert.sameValue(preVal, 11, 'preVal');
+assert.sameValue(called, 2, 'called');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-8-b-3.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-8-b-3.js
new file mode 100644
index 0000000000..02938e970d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-8-b-3.js
@@ -0,0 +1,47 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight -  while loop is breaken once
+    'kPresent' is true
+---*/
+
+var called = 0;
+var testResult = false;
+var firstCalled = 0;
+var secondCalled = 0;
+
+function callbackfn(prevVal, val, idx, obj) {
+  if (called === 0) {
+    testResult = (idx === 1);
+  }
+  called++;
+}
+
+var arr = [, , , ];
+
+Object.defineProperty(arr, "1", {
+  get: function() {
+    firstCalled++;
+    return 9;
+  },
+  configurable: true
+});
+
+Object.defineProperty(arr, "2", {
+  get: function() {
+    secondCalled++;
+    return 11;
+  },
+  configurable: true
+});
+
+arr.reduceRight(callbackfn);
+
+assert(testResult, 'testResult !== true');
+assert.sameValue(firstCalled, 1, 'firstCalled');
+assert.sameValue(secondCalled, 1, 'secondCalled');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-8-b-ii-1.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-8-b-ii-1.js
new file mode 100644
index 0000000000..1b8dbe9ea0
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-8-b-ii-1.js
@@ -0,0 +1,25 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - added properties in step 2 are
+    visible here
+---*/
+
+var obj = {};
+
+function callbackfn(prevVal, curVal, idx, obj) {}
+
+Object.defineProperty(obj, "length", {
+  get: function() {
+    obj[2] = "accumulator";
+    return 3;
+  },
+  configurable: true
+});
+
+assert.sameValue(Array.prototype.reduceRight.call(obj, callbackfn), "accumulator", 'Array.prototype.reduceRight.call(obj, callbackfn)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-8-b-ii-2.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-8-b-ii-2.js
new file mode 100644
index 0000000000..acdaba679b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-8-b-ii-2.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - deleted properties in step 2 are
+    visible here
+---*/
+
+var obj = {
+  2: "accumulator",
+  3: "another"
+};
+
+Object.defineProperty(obj, "length", {
+  get: function() {
+    delete obj[2];
+    return 5;
+  },
+  configurable: true
+});
+
+assert.notSameValue(Array.prototype.reduceRight.call(obj, function() {}), "accumulator", 'Array.prototype.reduceRight.call(obj, function () { })');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-8-b-iii-1-1.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-8-b-iii-1-1.js
new file mode 100644
index 0000000000..3a0f4403f9
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-8-b-iii-1-1.js
@@ -0,0 +1,29 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - element to be retrieved is own data
+    property on an Array-like object
+---*/
+
+var testResult = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx === 0) {
+    testResult = (prevVal === 1);
+  }
+}
+
+var obj = {
+  0: 0,
+  1: 1,
+  length: 2
+};
+
+Array.prototype.reduceRight.call(obj, callbackfn);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-8-b-iii-1-10.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-8-b-iii-1-10.js
new file mode 100644
index 0000000000..a2c8b2305b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-8-b-iii-1-10.js
@@ -0,0 +1,32 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - element to be retrieved is own
+    accessor property on an Array
+---*/
+
+var testResult = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx === 2) {
+    testResult = (curVal === 2);
+  }
+}
+
+var arr = [0, 1, , 3];
+
+Object.defineProperty(arr, "2", {
+  get: function() {
+    return 2;
+  },
+  configurable: true
+});
+
+arr.reduceRight(callbackfn);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-8-b-iii-1-11.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-8-b-iii-1-11.js
new file mode 100644
index 0000000000..a95f83a521
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-8-b-iii-1-11.js
@@ -0,0 +1,43 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - element to be retrieved is own
+    accessor property that overrides an inherited data property on an
+    Array-like object
+---*/
+
+var testResult = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx === 1) {
+    testResult = (prevVal === "20");
+  }
+}
+
+var proto = {
+  0: 0,
+  1: 1,
+  2: 2
+};
+
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+child.length = 3;
+
+Object.defineProperty(child, "2", {
+  get: function() {
+    return "20";
+  },
+  configurable: true
+});
+
+Array.prototype.reduceRight.call(child, callbackfn);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-8-b-iii-1-12.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-8-b-iii-1-12.js
new file mode 100644
index 0000000000..4abd152d2e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-8-b-iii-1-12.js
@@ -0,0 +1,34 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - element to be retrieved is own
+    accessor property that overrides an inherited data property on an
+    Array
+---*/
+
+var testResult = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx === 1) {
+    testResult = (prevVal === "20");
+  }
+}
+
+Array.prototype[2] = 2;
+var arr = [0, 1];
+
+Object.defineProperty(arr, "2", {
+  get: function() {
+    return "20";
+  },
+  configurable: true
+});
+
+arr.reduceRight(callbackfn);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-8-b-iii-1-13.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-8-b-iii-1-13.js
new file mode 100644
index 0000000000..c3fc91080f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-8-b-iii-1-13.js
@@ -0,0 +1,49 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - element to be retrieved is own
+    accessor property that overrides an inherited accessor property on
+    an Array-like object
+---*/
+
+var testResult = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx === 1) {
+    testResult = (prevVal === "20");
+  }
+}
+
+var proto = {
+  0: 0,
+  1: 1
+};
+
+Object.defineProperty(proto, "2", {
+  get: function() {
+    return 2;
+  },
+  configurable: true
+});
+
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+child.length = 3;
+
+Object.defineProperty(child, "2", {
+  get: function() {
+    return "20";
+  },
+  configurable: true
+});
+
+Array.prototype.reduceRight.call(child, callbackfn);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-8-b-iii-1-14.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-8-b-iii-1-14.js
new file mode 100644
index 0000000000..bef4e99259
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-8-b-iii-1-14.js
@@ -0,0 +1,40 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - element to be retrieved is own
+    accessor property that overrides an inherited accessor property on
+    an Array
+---*/
+
+var testResult = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx === 1) {
+    testResult = (prevVal === "20");
+  }
+}
+
+Object.defineProperty(Array.prototype, "2", {
+  get: function() {
+    return 2;
+  },
+  configurable: true
+});
+
+var arr = [0, 1, , ];
+
+Object.defineProperty(arr, "2", {
+  get: function() {
+    return "20";
+  },
+  configurable: true
+});
+
+arr.reduceRight(callbackfn);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-8-b-iii-1-15.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-8-b-iii-1-15.js
new file mode 100644
index 0000000000..9c075857d5
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-8-b-iii-1-15.js
@@ -0,0 +1,41 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - element to be retrieved is inherited
+    accessor property on an Array-like object
+---*/
+
+var testResult = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx === 1) {
+    testResult = (prevVal === 2);
+  }
+}
+
+var proto = {
+  0: 0,
+  1: 1
+};
+
+Object.defineProperty(proto, "2", {
+  get: function() {
+    return 2;
+  },
+  configurable: true
+});
+
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+child.length = 3;
+
+Array.prototype.reduceRight.call(child, callbackfn);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-8-b-iii-1-16.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-8-b-iii-1-16.js
new file mode 100644
index 0000000000..f4832f6dc8
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-8-b-iii-1-16.js
@@ -0,0 +1,32 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - element to be retrieved is inherited
+    accessor property on an Array
+---*/
+
+var testResult = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx === 1) {
+    testResult = (prevVal === 2);
+  }
+}
+
+Object.defineProperty(Array.prototype, "2", {
+  get: function() {
+    return 2;
+  },
+  configurable: true
+});
+
+var arr = [0, 1, , ];
+
+arr.reduceRight(callbackfn);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-8-b-iii-1-17.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-8-b-iii-1-17.js
new file mode 100644
index 0000000000..3237cbc95b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-8-b-iii-1-17.js
@@ -0,0 +1,34 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - element to be retrieved is own
+    accessor property without a get function on an Array-like object
+---*/
+
+var testResult = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx === 1) {
+    testResult = (typeof prevVal === "undefined");
+  }
+}
+
+var obj = {
+  0: 0,
+  1: 1,
+  length: 3
+};
+
+Object.defineProperty(obj, "2", {
+  set: function() {},
+  configurable: true
+});
+
+Array.prototype.reduceRight.call(obj, callbackfn);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-8-b-iii-1-18.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-8-b-iii-1-18.js
new file mode 100644
index 0000000000..759835c769
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-8-b-iii-1-18.js
@@ -0,0 +1,30 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - element to be retrieved is own
+    accessor property without a get function on an Array
+---*/
+
+var testResult = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx === 1) {
+    testResult = (typeof prevVal === "undefined");
+  }
+}
+
+var arr = [0, 1];
+
+Object.defineProperty(arr, "2", {
+  set: function() {},
+  configurable: true
+});
+
+arr.reduceRight(callbackfn);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-8-b-iii-1-19.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-8-b-iii-1-19.js
new file mode 100644
index 0000000000..65884de5d9
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-8-b-iii-1-19.js
@@ -0,0 +1,36 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - element to be retrieved is own
+    accessor property without a get function that overrides an
+    inherited accessor property on an Array-like object
+---*/
+
+var testResult = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx === 1) {
+    testResult = (typeof prevVal === "undefined");
+  }
+}
+
+Object.prototype[2] = 2;
+
+var obj = {
+  0: 0,
+  1: 1,
+  length: 3
+};
+Object.defineProperty(obj, "2", {
+  set: function() {},
+  configurable: true
+});
+
+Array.prototype.reduceRight.call(obj, callbackfn);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-8-b-iii-1-2.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-8-b-iii-1-2.js
new file mode 100644
index 0000000000..9579161a0a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-8-b-iii-1-2.js
@@ -0,0 +1,25 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - element to be retrieved is own data
+    property on an Array
+---*/
+
+var testResult = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx === 1) {
+    testResult = (prevVal === 2);
+  }
+}
+
+var arr = [0, 1, 2];
+
+arr.reduceRight(callbackfn);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-8-b-iii-1-20.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-8-b-iii-1-20.js
new file mode 100644
index 0000000000..cb22e630d6
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-8-b-iii-1-20.js
@@ -0,0 +1,31 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - element to be retrieved is own
+    accessor property without a get function that overrides an
+    inherited accessor property on an Array
+---*/
+
+var testResult = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx === 1) {
+    testResult = (typeof prevVal === "undefined");
+  }
+}
+
+Array.prototype[2] = 2;
+var arr = [0, 1];
+Object.defineProperty(arr, "2", {
+  set: function() {},
+  configurable: true
+});
+
+arr.reduceRight(callbackfn);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-8-b-iii-1-21.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-8-b-iii-1-21.js
new file mode 100644
index 0000000000..b210b8150b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-8-b-iii-1-21.js
@@ -0,0 +1,39 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - element to be retrieved is inherited
+    accessor property without a get function on an Array-like object
+---*/
+
+var testResult = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx === 1) {
+    testResult = (typeof prevVal === "undefined");
+  }
+}
+
+var proto = {
+  0: 0,
+  1: 1
+};
+
+Object.defineProperty(proto, "2", {
+  set: function() {},
+  configurable: true
+});
+
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+child.length = 3;
+
+Array.prototype.reduceRight.call(child, callbackfn);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-8-b-iii-1-22.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-8-b-iii-1-22.js
new file mode 100644
index 0000000000..5083b26b3d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-8-b-iii-1-22.js
@@ -0,0 +1,30 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - element to be retrieved is inherited
+    accessor property without a get function on an Array
+---*/
+
+var testResult = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx === 1) {
+    testResult = (typeof prevVal === "undefined");
+  }
+}
+
+Object.defineProperty(Array.prototype, "2", {
+  set: function() {},
+  configurable: true
+});
+
+var arr = [0, 1, , ];
+
+arr.reduceRight(callbackfn);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-8-b-iii-1-25.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-8-b-iii-1-25.js
new file mode 100644
index 0000000000..287c583b63
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-8-b-iii-1-25.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - This object is the Arguments object
+    which implements its own property get method (number of arguments
+    is less than number of parameters)
+---*/
+
+var testResult = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx === 0) {
+    testResult = (prevVal === 1);
+  }
+}
+
+var func = function(a, b, c) {
+  Array.prototype.reduceRight.call(arguments, callbackfn);
+};
+
+func(0, 1);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-8-b-iii-1-26.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-8-b-iii-1-26.js
new file mode 100644
index 0000000000..49bbbd0904
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-8-b-iii-1-26.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - This object is the Arguments object
+    which implements its own property get method (number of arguments
+    equals number of parameters)
+---*/
+
+var testResult = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx === 1) {
+    testResult = (prevVal === 2);
+  }
+}
+
+var func = function(a, b, c) {
+  Array.prototype.reduceRight.call(arguments, callbackfn);
+};
+
+func(0, 1, 2);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-8-b-iii-1-27.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-8-b-iii-1-27.js
new file mode 100644
index 0000000000..fe4f76a02a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-8-b-iii-1-27.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - This object is the Arguments object
+    which implements its own property get method (number of arguments
+    is greater than number of parameters)
+---*/
+
+var testResult = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx === 2) {
+    testResult = (prevVal === 3);
+  }
+}
+
+var func = function(a, b, c) {
+  Array.prototype.reduceRight.call(arguments, callbackfn);
+};
+
+func(0, 1, 2, 3);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-8-b-iii-1-28.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-8-b-iii-1-28.js
new file mode 100644
index 0000000000..2b7cf16f5e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-8-b-iii-1-28.js
@@ -0,0 +1,25 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight applied to String object, which
+    implements its own property get method
+---*/
+
+var testResult = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx === 1) {
+    testResult = (prevVal === "2");
+  }
+}
+
+var str = new String("012");
+
+Array.prototype.reduceRight.call(str, callbackfn);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-8-b-iii-1-29.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-8-b-iii-1-29.js
new file mode 100644
index 0000000000..fabc9b3af4
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-8-b-iii-1-29.js
@@ -0,0 +1,31 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight applied to Function object which
+    implements its own property get method
+---*/
+
+var testResult = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx === 1) {
+    testResult = (prevVal === 2);
+  }
+}
+
+var obj = function(a, b, c) {
+  return a + b + c;
+};
+
+obj[0] = 0;
+obj[1] = 1;
+obj[2] = 2;
+
+Array.prototype.reduceRight.call(obj, callbackfn);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-8-b-iii-1-3.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-8-b-iii-1-3.js
new file mode 100644
index 0000000000..145ded49ac
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-8-b-iii-1-3.js
@@ -0,0 +1,38 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - element to be retrieved is own data
+    property that overrides an inherited data property on an
+    Array-like object
+---*/
+
+var testResult = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx === 1) {
+    testResult = (prevVal === "20");
+  }
+}
+
+var proto = {
+  0: 0,
+  1: 1,
+  2: 2,
+  length: 2
+};
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+child[1] = "10";
+child[2] = "20";
+child.length = 3;
+
+Array.prototype.reduceRight.call(child, callbackfn);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-8-b-iii-1-30.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-8-b-iii-1-30.js
new file mode 100644
index 0000000000..c8303131c1
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-8-b-iii-1-30.js
@@ -0,0 +1,45 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - element changed by getter on current
+    iteration is observed in subsequent iterations on an Array
+---*/
+
+var testResult = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx === 1) {
+    testResult = (curVal === 1 && prevVal === 2);
+  }
+}
+
+var arr = [0];
+var preIterVisible = false;
+
+Object.defineProperty(arr, "1", {
+  get: function() {
+    if (preIterVisible) {
+      return 1;
+    } else {
+      return "20";
+    }
+  },
+  configurable: true
+});
+
+Object.defineProperty(arr, "2", {
+  get: function() {
+    preIterVisible = true;
+    return 2;
+  },
+  configurable: true
+});
+
+arr.reduceRight(callbackfn);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-8-b-iii-1-31.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-8-b-iii-1-31.js
new file mode 100644
index 0000000000..252e156541
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-8-b-iii-1-31.js
@@ -0,0 +1,48 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - element changed by getter on current
+    iteration is observed subsequetly on an Array-like object
+---*/
+
+var testResult = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx === 1) {
+    testResult = (prevVal === 2 && curVal === 1);
+  }
+}
+
+var obj = {
+  0: 0,
+  length: 3
+};
+var preIterVisible = false;
+
+Object.defineProperty(obj, "1", {
+  get: function() {
+    if (preIterVisible) {
+      return 1;
+    } else {
+      return "20";
+    }
+  },
+  configurable: true
+});
+
+Object.defineProperty(obj, "2", {
+  get: function() {
+    preIterVisible = true;
+    return 2;
+  },
+  configurable: true
+});
+
+Array.prototype.reduceRight.call(obj, callbackfn);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-8-b-iii-1-32.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-8-b-iii-1-32.js
new file mode 100644
index 0000000000..447a5efe57
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-8-b-iii-1-32.js
@@ -0,0 +1,35 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - Exception in getter terminate
+    iteration on an Array-like object
+---*/
+
+var accessed = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx <= 1) {
+    accessed = true;
+  }
+}
+
+var obj = {
+  0: 0,
+  1: 1,
+  length: 3
+};
+Object.defineProperty(obj, "2", {
+  get: function() {
+    throw new RangeError("unhandle exception happened in getter");
+  },
+  configurable: true
+});
+assert.throws(RangeError, function() {
+  Array.prototype.reduceRight.call(obj, callbackfn);
+});
+assert.sameValue(accessed, false, 'accessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-8-b-iii-1-33.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-8-b-iii-1-33.js
new file mode 100644
index 0000000000..4c1b16e59f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-8-b-iii-1-33.js
@@ -0,0 +1,32 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - Exception in getter terminate
+    iteration on an Array
+---*/
+
+var accessed = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx <= 1) {
+    accessed = true;
+  }
+}
+
+var arr = [0, 1];
+
+Object.defineProperty(arr, "2", {
+  get: function() {
+    throw new RangeError("unhandle exception happened in getter");
+  },
+  configurable: true
+});
+assert.throws(RangeError, function() {
+  arr.reduceRight(callbackfn);
+});
+assert.sameValue(accessed, false, 'accessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-8-b-iii-1-4.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-8-b-iii-1-4.js
new file mode 100644
index 0000000000..ad0869c841
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-8-b-iii-1-4.js
@@ -0,0 +1,24 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - element to be retrieved is own data
+    property that overrides an inherited data property on an Array
+---*/
+
+var testResult = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx === 1) {
+    testResult = (prevVal === 2);
+  }
+}
+
+Array.prototype[2] = "11";
+[0, 1, 2].reduceRight(callbackfn);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-8-b-iii-1-5.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-8-b-iii-1-5.js
new file mode 100644
index 0000000000..76abd845ff
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-8-b-iii-1-5.js
@@ -0,0 +1,45 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - element to be retrieved is own data
+    property that overrides an inherited accessor property on an
+    Array-like object
+---*/
+
+var testResult = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx === 1) {
+    testResult = (prevVal === "20");
+  }
+}
+
+var proto = {};
+
+Object.defineProperty(proto, "2", {
+  get: function() {
+    return 11;
+  },
+  configurable: true
+});
+
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+child.length = 3;
+child[0] = "0";
+child[1] = "1";
+Object.defineProperty(proto, "2", {
+  value: "20",
+  configurable: true
+});
+
+Array.prototype.reduceRight.call(child, callbackfn);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-8-b-iii-1-6.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-8-b-iii-1-6.js
new file mode 100644
index 0000000000..05f13e7c6b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-8-b-iii-1-6.js
@@ -0,0 +1,29 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - element to be retrieved is own data
+    property that overrides an inherited accessor property on an Array
+---*/
+
+var testResult = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx === 1) {
+    testResult = (prevVal === 2);
+  }
+}
+
+Object.defineProperty(Array.prototype, "2", {
+  get: function() {
+    return "2";
+  },
+  configurable: true
+});
+[0, 1, 2].reduceRight(callbackfn);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-8-b-iii-1-7.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-8-b-iii-1-7.js
new file mode 100644
index 0000000000..e54b80fd1d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-8-b-iii-1-7.js
@@ -0,0 +1,34 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - element to be retrieved is inherited
+    data property on an Array-like object
+---*/
+
+var testResult = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx === 1) {
+    testResult = (prevVal === 2);
+  }
+}
+
+var proto = {
+  0: 0,
+  1: 1,
+  2: 2,
+  length: 3
+};
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+
+Array.prototype.reduceRight.call(child, callbackfn);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-8-b-iii-1-8.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-8-b-iii-1-8.js
new file mode 100644
index 0000000000..e4931296db
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-8-b-iii-1-8.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - element to be retrieved is inherited
+    data property on an Array
+---*/
+
+var testResult = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx === 1) {
+    testResult = (prevVal === 2);
+  }
+}
+
+Array.prototype[0] = 0;
+Array.prototype[1] = 1;
+Array.prototype[2] = 2;
+[, , , ].reduceRight(callbackfn);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-8-b-iii-1-9.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-8-b-iii-1-9.js
new file mode 100644
index 0000000000..a4cae86ed3
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-8-b-iii-1-9.js
@@ -0,0 +1,35 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - element to be retrieved is own
+    accessor property on an Array-like object
+---*/
+
+var testResult = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx === 1) {
+    testResult = (prevVal === 2);
+  }
+}
+
+var obj = {
+  0: 0,
+  1: 1,
+  length: 3
+};
+Object.defineProperty(obj, "2", {
+  get: function() {
+    return 2;
+  },
+  configurable: true
+});
+
+Array.prototype.reduceRight.call(obj, callbackfn);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-8-c-1.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-8-c-1.js
new file mode 100644
index 0000000000..9a53144651
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-8-c-1.js
@@ -0,0 +1,19 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight throws TypeError when Array is empty
+    and initialValue is not present
+---*/
+
+function callbackfn(prevVal, curVal, idx, obj)
+{}
+
+var arr = new Array(10);
+assert.throws(TypeError, function() {
+  arr.reduceRight(callbackfn);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-8-c-2.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-8-c-2.js
new file mode 100644
index 0000000000..108fbe48c5
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-8-c-2.js
@@ -0,0 +1,22 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight throws TypeError when elements
+    assigned values are deleted by reducign array length and
+    initialValue is not present
+---*/
+
+function callbackfn(prevVal, curVal, idx, obj)
+{}
+
+var arr = new Array(10);
+arr[9] = 1;
+arr.length = 5;
+assert.throws(TypeError, function() {
+  arr.reduceRight(callbackfn);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-8-c-3.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-8-c-3.js
new file mode 100644
index 0000000000..00cecb0f17
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-8-c-3.js
@@ -0,0 +1,24 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight throws TypeError when elements
+    assigned values are deleted and initialValue is not present
+---*/
+
+function callbackfn(prevVal, curVal, idx, obj)
+{}
+
+var arr = [1, 2, 3, 4, 5];
+delete arr[0];
+delete arr[1];
+delete arr[2];
+delete arr[3];
+delete arr[4];
+assert.throws(TypeError, function() {
+  arr.reduceRight(callbackfn);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-8-c-4.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-8-c-4.js
new file mode 100644
index 0000000000..60e70d312a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-8-c-4.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight doesn't throw error when array has no
+    own properties but prototype contains a single property
+---*/
+
+var arr = [, , , ];
+
+try {
+  Array.prototype[1] = "prototype";
+  arr.reduceRight(function() {});
+} finally {
+  delete Array.prototype[1];
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-8-c-5.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-8-c-5.js
new file mode 100644
index 0000000000..c7d70f4779
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-8-c-5.js
@@ -0,0 +1,27 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - side effects produced by step 2 are
+    visible when an exception occurs
+---*/
+
+var obj = {};
+
+var accessed = false;
+
+Object.defineProperty(obj, "length", {
+  get: function() {
+    accessed = true;
+    return 2;
+  },
+  configurable: true
+});
+assert.throws(TypeError, function() {
+  Array.prototype.reduceRight.call(obj, function() {});
+});
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-8-c-6.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-8-c-6.js
new file mode 100644
index 0000000000..0458cfa96a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-8-c-6.js
@@ -0,0 +1,31 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - side effects produced by step 3 are
+    visible when an exception occurs
+---*/
+
+var obj = {};
+
+var accessed = false;
+
+Object.defineProperty(obj, "length", {
+  get: function() {
+    return {
+      toString: function() {
+        accessed = true;
+        return "2";
+      }
+    };
+  },
+  configurable: true
+});
+assert.throws(TypeError, function() {
+  Array.prototype.reduceRight.call(obj, function() {});
+});
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-8-c-7.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-8-c-7.js
new file mode 100644
index 0000000000..125317592b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-8-c-7.js
@@ -0,0 +1,24 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - the exception is not thrown if
+    exception was thrown by step 2
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "length", {
+  get: function() {
+    throw new Test262Error();
+  },
+  configurable: true
+});
+
+assert.throws(Test262Error, function() {
+  Array.prototype.reduceRight.call(obj, function() {});
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-8-c-8.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-8-c-8.js
new file mode 100644
index 0000000000..c3900adf69
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-8-c-8.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - the exception is not thrown if
+    exception was thrown by step 3
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "length", {
+  get: function() {
+    return {
+      toString: function() {
+        throw new Test262Error();
+      }
+    };
+  },
+  configurable: true
+});
+
+assert.throws(Test262Error, function() {
+  Array.prototype.reduceRight.call(obj, function() {});
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-1.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-1.js
new file mode 100644
index 0000000000..87cd27ba3b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-1.js
@@ -0,0 +1,23 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight doesn't consider new elements which
+    index is larger than array original length added to array after it
+    is called, consider new elements which index is smaller than array
+    length
+---*/
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  arr[5] = 6;
+  arr[2] = 3;
+  return prevVal + curVal;
+}
+
+var arr = ['1', 2, , 4, '5'];
+
+assert.sameValue(arr.reduceRight(callbackfn), "54321", 'arr.reduceRight(callbackfn)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-2.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-2.js
new file mode 100644
index 0000000000..b7c0d68c0f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-2.js
@@ -0,0 +1,22 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight considers new value of elements in
+    array after it is called
+---*/
+
+function callbackfn(prevVal, curVal, idx, obj)
+{
+  arr[3] = -2;
+  arr[0] = -1;
+  return prevVal + curVal;
+}
+
+var arr = [1, 2, 3, 4, 5];
+
+assert.sameValue(arr.reduceRight(callbackfn), 13, 'arr.reduceRight(callbackfn)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-3.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-3.js
new file mode 100644
index 0000000000..65d3b1cdc9
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-3.js
@@ -0,0 +1,23 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight doesn't consider unvisited deleted
+    elements in array after the call
+---*/
+
+function callbackfn(prevVal, curVal, idx, obj)
+{
+  delete arr[1];
+  delete arr[4];
+  return prevVal + curVal;
+}
+
+var arr = ['1', 2, 3, 4, 5];
+
+// two elements deleted
+assert.sameValue(arr.reduceRight(callbackfn), "121", 'arr.reduceRight(callbackfn)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-4.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-4.js
new file mode 100644
index 0000000000..6d3a05647c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-4.js
@@ -0,0 +1,21 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight doesn't consider unvisited deleted
+    elements when Array.length is decreased
+---*/
+
+function callbackfn(prevVal, curVal, idx, obj)
+{
+  arr.length = 2;
+  return prevVal + curVal;
+}
+
+var arr = [1, 2, 3, 4, 5];
+
+assert.sameValue(arr.reduceRight(callbackfn), 12, 'arr.reduceRight(callbackfn)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-5.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-5.js
new file mode 100644
index 0000000000..f1dc9f700f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-5.js
@@ -0,0 +1,24 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - callbackfn not called for array with
+    one element
+---*/
+
+var callCnt = 0;
+
+function callbackfn(prevVal, curVal, idx, obj)
+{
+  callCnt++;
+  return 2;
+}
+
+var arr = [1];
+
+assert.sameValue(arr.reduceRight(callbackfn), 1, 'arr.reduceRight(callbackfn)');
+assert.sameValue(callCnt, 0, 'callCnt');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-6.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-6.js
new file mode 100644
index 0000000000..2e9479fca9
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-6.js
@@ -0,0 +1,25 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight visits deleted element in array after
+    the call when same index is also present in prototype
+---*/
+
+function callbackfn(prevVal, curVal, idx, obj)
+{
+  delete arr[1];
+  delete arr[2];
+  return prevVal + curVal;
+}
+Array.prototype[2] = 6;
+var arr = ['1', 2, 3, 4, 5];
+var res = arr.reduceRight(callbackfn);
+delete Array.prototype[2];
+
+//one element deleted
+assert.sameValue(res, "151", 'res');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-7.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-7.js
new file mode 100644
index 0000000000..c91ad96b3b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-7.js
@@ -0,0 +1,22 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight not affect call when the array is
+    deleted during the call
+---*/
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  delete o.arr;
+  return prevVal + curVal;
+}
+
+var o = new Object();
+o.arr = ['1', 2, 3, 4, 5];
+
+assert.sameValue(o.arr.reduceRight(callbackfn), "141", 'o.arr.reduceRight(callbackfn)');
+assert.sameValue(o.hasOwnProperty("arr"), false, 'o.hasOwnProperty("arr")');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-8.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-8.js
new file mode 100644
index 0000000000..6ff99c27d0
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-8.js
@@ -0,0 +1,35 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - no observable effects occur if 'len'
+    is 0
+---*/
+
+var accessed = false;
+var callbackAccessed = false;
+
+function callbackfn() {
+  callbackAccessed = true;
+}
+
+var obj = {
+  length: 0
+};
+
+Object.defineProperty(obj, "5", {
+  get: function() {
+    accessed = true;
+    return 10;
+  },
+  configurable: true
+});
+
+Array.prototype.reduceRight.call(obj, callbackfn, "initialValue");
+
+assert.sameValue(accessed, false, 'accessed');
+assert.sameValue(callbackAccessed, false, 'callbackAccessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-9.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-9.js
new file mode 100644
index 0000000000..48c4cb806f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-9.js
@@ -0,0 +1,29 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - modifications to length will change
+    number of iterations
+---*/
+
+var called = 0;
+
+function callbackfn(preVal, val, idx, obj) {
+  called++;
+}
+
+var arr = [0, 1, 2, 3];
+Object.defineProperty(arr, "4", {
+  get: function() {
+    arr.length = 2;
+  },
+  configurable: true
+});
+
+arr.reduceRight(callbackfn, "initialValue");
+
+assert.sameValue(called, 3, 'called');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-b-1.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-b-1.js
new file mode 100644
index 0000000000..bb70adf44d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-b-1.js
@@ -0,0 +1,19 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight returns initialvalue when Array is
+    empty and initialValue is not present
+---*/
+
+function callbackfn(prevVal, curVal, idx, obj)
+{}
+
+var arr = new Array(10);
+
+
+assert.sameValue(arr.reduceRight(callbackfn, 5), 5, 'arr.reduceRight(callbackfn,5)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-b-10.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-b-10.js
new file mode 100644
index 0000000000..f31a22a337
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-b-10.js
@@ -0,0 +1,41 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - deleting property of prototype in
+    step 8 causes deleted index property not to be visited on an
+    Array-like Object
+---*/
+
+var accessed = false;
+var testResult = true;
+
+function callbackfn(preVal, val, idx, obj) {
+  accessed = true;
+  if (idx === 3) {
+    testResult = false;
+  }
+}
+
+var obj = {
+  2: 2,
+  length: 20
+};
+
+Object.defineProperty(obj, "5", {
+  get: function() {
+    delete Object.prototype[3];
+    return 0;
+  },
+  configurable: true
+});
+
+Object.prototype[3] = 1;
+Array.prototype.reduceRight.call(obj, callbackfn);
+
+assert(testResult, 'testResult !== true');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-b-11.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-b-11.js
new file mode 100644
index 0000000000..aaa374d024
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-b-11.js
@@ -0,0 +1,36 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - deleting property of prototype in
+    step 8 causes deleted index property not to be visited on an Array
+---*/
+
+var accessed = false;
+var testResult = true;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  accessed = true;
+  if (idx === 1) {
+    testResult = false;
+  }
+}
+
+var arr = [0, , , ];
+Object.defineProperty(arr, "3", {
+  get: function() {
+    delete Array.prototype[1];
+    return 0;
+  },
+  configurable: true
+});
+
+Array.prototype[1] = 1;
+arr.reduceRight(callbackfn);
+
+assert(testResult, 'testResult !== true');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-b-12.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-b-12.js
new file mode 100644
index 0000000000..3e0cc96e44
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-b-12.js
@@ -0,0 +1,39 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - deleting own property with prototype
+    property in step 8 causes prototype index property to be visited
+    on an Array-like object
+---*/
+
+var testResult = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx === 1 && curVal === 1) {
+    testResult = true;
+  }
+}
+
+var obj = {
+  0: 0,
+  1: 111,
+  length: 10
+};
+
+Object.defineProperty(obj, "4", {
+  get: function() {
+    delete obj[1];
+    return 0;
+  },
+  configurable: true
+});
+
+Object.prototype[1] = 1;
+Array.prototype.reduceRight.call(obj, callbackfn);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-b-13.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-b-13.js
new file mode 100644
index 0000000000..372cc99ec1
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-b-13.js
@@ -0,0 +1,34 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - deleting own property with prototype
+    property in step 8 causes prototype index property to be visited
+    on an Array
+---*/
+
+var testResult = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx === 1 && curVal === 1) {
+    testResult = true;
+  }
+}
+var arr = [0, 111];
+
+Object.defineProperty(arr, "2", {
+  get: function() {
+    delete arr[1];
+    return 0;
+  },
+  configurable: true
+});
+
+Array.prototype[1] = 1;
+arr.reduceRight(callbackfn);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-b-14.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-b-14.js
new file mode 100644
index 0000000000..1c7c8834e6
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-b-14.js
@@ -0,0 +1,36 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - decreasing length of array in step 8
+    causes deleted index property not to be visited
+---*/
+
+var accessed = false;
+var testResult = true;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  accessed = true;
+  if (idx === 2) {
+    testResult = false;
+  }
+}
+
+var arr = [0, 1, 2, 3];
+
+Object.defineProperty(arr, "3", {
+  get: function() {
+    arr.length = 2;
+    return 0;
+  },
+  configurable: true
+});
+
+arr.reduceRight(callbackfn);
+
+assert(testResult, 'testResult !== true');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-b-15.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-b-15.js
new file mode 100644
index 0000000000..fd482cbc21
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-b-15.js
@@ -0,0 +1,40 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - decreasing length of array with
+    prototype property in step 8 causes prototype index property to be
+    visited
+---*/
+
+var testResult = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx === 2 && curVal === "prototype") {
+    testResult = true;
+  }
+}
+var arr = [0, 1, 2, 3];
+
+Object.defineProperty(Array.prototype, "2", {
+  get: function() {
+    return "prototype";
+  },
+  configurable: true
+});
+
+Object.defineProperty(arr, "3", {
+  get: function() {
+    arr.length = 2;
+    return 1;
+  },
+  configurable: true
+});
+
+arr.reduceRight(callbackfn);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-b-16.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-b-16.js
new file mode 100644
index 0000000000..e00cdef991
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-b-16.js
@@ -0,0 +1,41 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - decreasing length of array in step 8
+    does not delete non-configurable properties
+flags: [noStrict]
+---*/
+
+var testResult = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx === 2 && curVal === "unconfigurable") {
+    testResult = true;
+  }
+}
+
+var arr = [0, 1, 2, 3];
+
+Object.defineProperty(arr, "2", {
+  get: function() {
+    return "unconfigurable";
+  },
+  configurable: false
+});
+
+Object.defineProperty(arr, "3", {
+  get: function() {
+    arr.length = 2;
+    return 1;
+  },
+  configurable: true
+});
+
+arr.reduceRight(callbackfn);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-b-17.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-b-17.js
new file mode 100644
index 0000000000..4dc8fd611b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-b-17.js
@@ -0,0 +1,40 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - properties added into own object are
+    visited on an Array-like object
+---*/
+
+var testResult = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx === 0 && curVal === 0) {
+    testResult = true;
+  }
+}
+
+var obj = {
+  length: 2
+};
+
+Object.defineProperty(obj, "1", {
+  get: function() {
+    Object.defineProperty(obj, "0", {
+      get: function() {
+        return 0;
+      },
+      configurable: true
+    });
+    return 1;
+  },
+  configurable: true
+});
+
+Array.prototype.reduceRight.call(obj, callbackfn, "initialValue");
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-b-18.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-b-18.js
new file mode 100644
index 0000000000..a9ccb43bfd
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-b-18.js
@@ -0,0 +1,38 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - properties added into own object are
+    visited on an Array
+---*/
+
+var testResult = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx === 1 && curVal === 1) {
+    testResult = true;
+  }
+}
+
+var arr = [0, , 2];
+
+Object.defineProperty(arr, "2", {
+  get: function() {
+    Object.defineProperty(arr, "1", {
+      get: function() {
+        return 1;
+      },
+      configurable: true
+    });
+    return 0;
+  },
+  configurable: true
+});
+
+arr.reduceRight(callbackfn, "initialValue");
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-b-19.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-b-19.js
new file mode 100644
index 0000000000..f21ff313b6
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-b-19.js
@@ -0,0 +1,40 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - properties added to prototype are
+    visited on an Array-like object
+---*/
+
+var testResult = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx === 1 && curVal === 6.99) {
+    testResult = true;
+  }
+}
+
+var obj = {
+  length: 6
+};
+
+Object.defineProperty(obj, "2", {
+  get: function() {
+    Object.defineProperty(Object.prototype, "1", {
+      get: function() {
+        return 6.99;
+      },
+      configurable: true
+    });
+    return 0;
+  },
+  configurable: true
+});
+
+Array.prototype.reduceRight.call(obj, callbackfn, "initialValue");
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-b-2.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-b-2.js
new file mode 100644
index 0000000000..f68ffddfa9
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-b-2.js
@@ -0,0 +1,33 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - added properties in step 2 are
+    visible here
+---*/
+
+var testResult = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx === 2 && curVal === "2") {
+    testResult = true;
+  }
+}
+
+var obj = {};
+
+Object.defineProperty(obj, "length", {
+  get: function() {
+    obj[2] = "2";
+    return 3;
+  },
+  configurable: true
+});
+
+Array.prototype.reduceRight.call(obj, callbackfn, "initialValue");
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-b-20.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-b-20.js
new file mode 100644
index 0000000000..6a512f0663
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-b-20.js
@@ -0,0 +1,38 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - properties added to prototype can be
+    visited on an Array
+---*/
+
+var testResult = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx === 1 && curVal === 6.99) {
+    testResult = true;
+  }
+}
+
+var arr = [0, , 2];
+
+Object.defineProperty(arr, "2", {
+  get: function() {
+    Object.defineProperty(Array.prototype, "1", {
+      get: function() {
+        return 6.99;
+      },
+      configurable: true
+    });
+    return 0;
+  },
+  configurable: true
+});
+
+arr.reduceRight(callbackfn, "initialValue");
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-b-21.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-b-21.js
new file mode 100644
index 0000000000..f99e17432d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-b-21.js
@@ -0,0 +1,46 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - deleting own property causes deleted
+    index property not to be visited on an Array-like object
+---*/
+
+var accessed = false;
+var testResult = true;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  accessed = true;
+  if (idx === 1) {
+    testResult = false;
+  }
+}
+
+var obj = {
+  0: 10,
+  length: 10
+};
+
+Object.defineProperty(obj, "1", {
+  get: function() {
+    return 6.99;
+  },
+  configurable: true
+});
+
+Object.defineProperty(obj, "5", {
+  get: function() {
+    delete obj[1];
+    return 0;
+  },
+  configurable: true
+});
+
+Array.prototype.reduceRight.call(obj, callbackfn, "initialValue");
+
+assert(testResult, 'testResult !== true');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-b-22.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-b-22.js
new file mode 100644
index 0000000000..f329d8731d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-b-22.js
@@ -0,0 +1,43 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - deleting own property causes deleted
+    index property not to be visited on an Array
+---*/
+
+var accessed = false;
+var testResult = true;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  accessed = true;
+  if (idx === 1) {
+    testResult = false;
+  }
+}
+
+var arr = [1, 2, 4];
+
+Object.defineProperty(arr, "1", {
+  get: function() {
+    return "6.99";
+  },
+  configurable: true
+});
+
+Object.defineProperty(arr, "2", {
+  get: function() {
+    delete arr[1];
+    return 0;
+  },
+  configurable: true
+});
+
+arr.reduceRight(callbackfn, "initialValue");
+
+assert(testResult, 'testResult !== true');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-b-23.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-b-23.js
new file mode 100644
index 0000000000..b68b324509
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-b-23.js
@@ -0,0 +1,41 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - deleting property of prototype
+    causes deleted index property not to be visited on an Array-like
+    Object
+---*/
+
+var accessed = false;
+var testResult = true;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  accessed = true;
+  if (idx === 3) {
+    testResult = false;
+  }
+}
+
+var obj = {
+  2: 2,
+  length: 20
+};
+
+Object.defineProperty(obj, "5", {
+  get: function() {
+    delete Object.prototype[3];
+    return 0;
+  },
+  configurable: true
+});
+
+Object.prototype[3] = 1;
+Array.prototype.reduceRight.call(obj, callbackfn, "initialValue");
+
+assert(testResult, 'testResult !== true');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-b-24.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-b-24.js
new file mode 100644
index 0000000000..c3a23e9f08
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-b-24.js
@@ -0,0 +1,36 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - deleting property of prototype
+    causes deleted index property not to be visited on an Array
+---*/
+
+var accessed = false;
+var testResult = true;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  accessed = true;
+  if (idx === 1) {
+    testResult = false;
+  }
+}
+
+var arr = [0, , , ];
+Object.defineProperty(arr, "3", {
+  get: function() {
+    delete Array.prototype[1];
+    return 0;
+  },
+  configurable: true
+});
+
+Array.prototype[1] = 1;
+arr.reduceRight(callbackfn, "initialValue");
+
+assert(testResult, 'testResult !== true');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-b-25.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-b-25.js
new file mode 100644
index 0000000000..cf1e1bf9c9
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-b-25.js
@@ -0,0 +1,40 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - deleting own property with prototype
+    property causes prototype index property to be visited on an
+    Array-like object
+---*/
+
+var testResult = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx === 1 && curVal === 1) {
+    testResult = true;
+  }
+}
+
+var obj = {
+  0: 0,
+  1: 111,
+  4: 10,
+  length: 10
+};
+
+Object.defineProperty(obj, "4", {
+  get: function() {
+    delete obj[1];
+    return 0;
+  },
+  configurable: true
+});
+
+Object.prototype[1] = 1;
+Array.prototype.reduceRight.call(obj, callbackfn, "initialValue");
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-b-26.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-b-26.js
new file mode 100644
index 0000000000..7e1626c7aa
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-b-26.js
@@ -0,0 +1,33 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - deleting own property with prototype
+    property causes prototype index property to be visited on an Array
+---*/
+
+var testResult = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx === 1 && curVal === 1) {
+    testResult = true;
+  }
+}
+var arr = [0, 111];
+
+Object.defineProperty(arr, "2", {
+  get: function() {
+    delete arr[1];
+    return 0;
+  },
+  configurable: true
+});
+
+Array.prototype[1] = 1;
+arr.reduceRight(callbackfn, "initialValue");
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-b-27.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-b-27.js
new file mode 100644
index 0000000000..e6434ff55f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-b-27.js
@@ -0,0 +1,36 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - decreasing length of array causes
+    deleted index property not to be visited
+---*/
+
+var accessed = false;
+var testResult = true;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  accessed = true;
+  if (idx === 2) {
+    testResult = false;
+  }
+}
+
+var arr = [0, 1, 2, 3];
+
+Object.defineProperty(arr, "3", {
+  get: function() {
+    arr.length = 2;
+    return 0;
+  },
+  configurable: true
+});
+
+arr.reduceRight(callbackfn, "initialValue");
+
+assert(testResult, 'testResult !== true');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-b-28.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-b-28.js
new file mode 100644
index 0000000000..d79bed6b88
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-b-28.js
@@ -0,0 +1,39 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - decreasing length of array with
+    prototype property causes prototype index property to be visited
+---*/
+
+var testResult = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx === 2 && curVal === "prototype") {
+    testResult = true;
+  }
+}
+var arr = [0, 1, 2, 3];
+
+Object.defineProperty(Array.prototype, "2", {
+  get: function() {
+    return "prototype";
+  },
+  configurable: true
+});
+
+Object.defineProperty(arr, "3", {
+  get: function() {
+    arr.length = 2;
+    return 1;
+  },
+  configurable: true
+});
+
+arr.reduceRight(callbackfn, "initialValue");
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-b-29.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-b-29.js
new file mode 100644
index 0000000000..d90a6cfde6
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-b-29.js
@@ -0,0 +1,41 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - decreasing length of array does not
+    delete non-configurable properties
+flags: [noStrict]
+---*/
+
+var testResult = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx === 2 && curVal === "unconfigurable") {
+    testResult = true;
+  }
+}
+
+var arr = [0, 1, 2, 3];
+
+Object.defineProperty(arr, "2", {
+  get: function() {
+    return "unconfigurable";
+  },
+  configurable: false
+});
+
+Object.defineProperty(arr, "3", {
+  get: function() {
+    arr.length = 2;
+    return 1;
+  },
+  configurable: true
+});
+
+arr.reduceRight(callbackfn, "initialValue");
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-b-3.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-b-3.js
new file mode 100644
index 0000000000..b67f066a9d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-b-3.js
@@ -0,0 +1,39 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - deleted properties in step 2 are
+    visible here
+---*/
+
+var accessed = false;
+var testResult = true;
+
+function callbackfn(preVal, curVal, idx, obj) {
+  accessed = true;
+  if (idx === 2) {
+    testResult = false;
+  }
+}
+
+var obj = {
+  2: "2",
+  3: 10
+};
+
+Object.defineProperty(obj, "length", {
+  get: function() {
+    delete obj[2];
+    return 5;
+  },
+  configurable: true
+});
+
+Array.prototype.reduceRight.call(obj, callbackfn, "initialValue");
+
+assert(accessed, 'accessed !== true');
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-b-4.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-b-4.js
new file mode 100644
index 0000000000..78a6b4c2ff
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-b-4.js
@@ -0,0 +1,40 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - properties added into own object in
+    step 8 can be visited on an Array-like object
+---*/
+
+var testResult = false;
+
+function callbackfn(preVal, curVal, idx, obj) {
+  if (idx === 0 && curVal === 0) {
+    testResult = true;
+  }
+}
+
+var obj = {
+  length: 2
+};
+
+Object.defineProperty(obj, "1", {
+  get: function() {
+    Object.defineProperty(obj, "0", {
+      get: function() {
+        return 0;
+      },
+      configurable: true
+    });
+    return 1;
+  },
+  configurable: true
+});
+
+Array.prototype.reduceRight.call(obj, callbackfn);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-b-5.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-b-5.js
new file mode 100644
index 0000000000..d86d7f4821
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-b-5.js
@@ -0,0 +1,38 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - properties added into own object in
+    step 8 can be visited on an Array
+---*/
+
+var testResult = false;
+
+function callbackfn(preVal, curVal, idx, obj) {
+  if (idx === 1 && curVal === 1) {
+    testResult = true;
+  }
+}
+
+var arr = [0, , 2];
+
+Object.defineProperty(arr, "2", {
+  get: function() {
+    Object.defineProperty(arr, "1", {
+      get: function() {
+        return 1;
+      },
+      configurable: true
+    });
+    return 0;
+  },
+  configurable: true
+});
+
+arr.reduceRight(callbackfn);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-b-6.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-b-6.js
new file mode 100644
index 0000000000..bf88884835
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-b-6.js
@@ -0,0 +1,40 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - properties added to prototype in
+    step 8 visited on an Array-like object
+---*/
+
+var testResult = false;
+
+function callbackfn(preVal, curVal, idx, obj) {
+  if (idx === 1 && curVal === 6.99) {
+    testResult = true;
+  }
+}
+
+var obj = {
+  length: 6
+};
+
+Object.defineProperty(obj, "2", {
+  get: function() {
+    Object.defineProperty(Object.prototype, "1", {
+      get: function() {
+        return 6.99;
+      },
+      configurable: true
+    });
+    return 0;
+  },
+  configurable: true
+});
+
+Array.prototype.reduceRight.call(obj, callbackfn);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-b-7.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-b-7.js
new file mode 100644
index 0000000000..a660fc411e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-b-7.js
@@ -0,0 +1,38 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - properties added to prototype in
+    step 8 visited on an Array
+---*/
+
+var testResult = false;
+
+function callbackfn(preVal, curVal, idx, obj) {
+  if (idx === 1 && curVal === 6.99) {
+    testResult = true;
+  }
+}
+
+var arr = [0, , 2];
+
+Object.defineProperty(arr, "2", {
+  get: function() {
+    Object.defineProperty(Array.prototype, "1", {
+      get: function() {
+        return 6.99;
+      },
+      configurable: true
+    });
+    return 0;
+  },
+  configurable: true
+});
+
+arr.reduceRight(callbackfn);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-b-8.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-b-8.js
new file mode 100644
index 0000000000..7b14c28e20
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-b-8.js
@@ -0,0 +1,47 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - deleting own property in step 8
+    causes deleted index property not to be visited on an Array-like
+    object
+---*/
+
+var accessed = false;
+var testResult = true;
+
+function callbackfn(preVal, val, idx, obj) {
+  accessed = true;
+  if (idx === 1) {
+    testResult = false;
+  }
+}
+
+var obj = {
+  0: 10,
+  length: 10
+};
+
+Object.defineProperty(obj, "1", {
+  get: function() {
+    return 6.99;
+  },
+  configurable: true
+});
+
+Object.defineProperty(obj, "5", {
+  get: function() {
+    delete obj[1];
+    return 0;
+  },
+  configurable: true
+});
+
+Array.prototype.reduceRight.call(obj, callbackfn);
+
+assert(testResult, 'testResult !== true');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-b-9.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-b-9.js
new file mode 100644
index 0000000000..ee7a758b92
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-b-9.js
@@ -0,0 +1,43 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - deleting own property in step 8
+    causes deleted index property not to be visited on an Array
+---*/
+
+var accessed = false;
+var testResult = true;
+
+function callbackfn(preVal, curVal, idx, obj) {
+  accessed = true;
+  if (idx === 1) {
+    testResult = false;
+  }
+}
+
+var arr = [0];
+
+Object.defineProperty(arr, "1", {
+  get: function() {
+    return "6.99";
+  },
+  configurable: true
+});
+
+Object.defineProperty(arr, "2", {
+  get: function() {
+    delete arr[1];
+    return 0;
+  },
+  configurable: true
+});
+
+arr.reduceRight(callbackfn);
+
+assert(testResult, 'testResult !== true');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-1.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-1.js
new file mode 100644
index 0000000000..dedae5359e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-1.js
@@ -0,0 +1,25 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - callbackfn not called for indexes
+    never been assigned values
+---*/
+
+var callCnt = 0;
+
+function callbackfn(prevVal, curVal, idx, obj)
+{
+  callCnt++;
+  return curVal;
+}
+
+var arr = new Array(10);
+arr[0] = arr[1] = undefined; //explicitly assigning a value
+
+assert.sameValue(arr.reduceRight(callbackfn), undefined, 'arr.reduceRight(callbackfn)');
+assert.sameValue(callCnt, 1, 'callCnt');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-i-1.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-i-1.js
new file mode 100644
index 0000000000..6a6f41de5c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-i-1.js
@@ -0,0 +1,29 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - element to be retrieved is own data
+    property on an Array-like object
+---*/
+
+var testResult = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx === 0) {
+    testResult = (curVal === 0);
+  }
+}
+
+var obj = {
+  0: 0,
+  1: 1,
+  2: 2,
+  length: 2
+};
+Array.prototype.reduceRight.call(obj, callbackfn, "initialValue");
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-i-10.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-i-10.js
new file mode 100644
index 0000000000..366358b9fd
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-i-10.js
@@ -0,0 +1,32 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - element to be retrieved is own
+    accessor property on an Array
+---*/
+
+var testResult = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx === 1) {
+    testResult = (curVal === 1);
+  }
+}
+
+var arr = [0, , 2];
+
+Object.defineProperty(arr, "1", {
+  get: function() {
+    return 1;
+  },
+  configurable: true
+});
+
+arr.reduceRight(callbackfn, "initialValue");
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-i-11.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-i-11.js
new file mode 100644
index 0000000000..e47c9fe125
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-i-11.js
@@ -0,0 +1,43 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - element to be retrieved is own
+    accessor property that overrides an inherited data property on an
+    Array-like object
+---*/
+
+var testResult = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx === 1) {
+    testResult = (curVal === "1");
+  }
+}
+
+var proto = {
+  0: 0,
+  1: 11,
+  2: 2
+};
+
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+child.length = 3;
+
+Object.defineProperty(child, "1", {
+  get: function() {
+    return "1";
+  },
+  configurable: true
+});
+
+Array.prototype.reduceRight.call(child, callbackfn, "initialValue");
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-i-12.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-i-12.js
new file mode 100644
index 0000000000..116ee8e9b7
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-i-12.js
@@ -0,0 +1,34 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - element to be retrieved is own
+    accessor property that overrides an inherited data property on an
+    Array
+---*/
+
+var testResult = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx === 1) {
+    testResult = (curVal === "1");
+  }
+}
+
+Array.prototype[1] = 11;
+var arr = [0, , 2];
+
+Object.defineProperty(arr, "1", {
+  get: function() {
+    return "1";
+  },
+  configurable: true
+});
+
+arr.reduceRight(callbackfn, "initialValue");
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-i-13.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-i-13.js
new file mode 100644
index 0000000000..2627936945
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-i-13.js
@@ -0,0 +1,49 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - element to be retrieved is own
+    accessor property that overrides an inherited accessor property on
+    an Array-like object
+---*/
+
+var testResult = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx === 1) {
+    testResult = (curVal === "1");
+  }
+}
+
+var proto = {
+  0: 0,
+  2: 2
+};
+
+Object.defineProperty(proto, "1", {
+  get: function() {
+    return 11;
+  },
+  configurable: true
+});
+
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+child.length = 3;
+
+Object.defineProperty(child, "1", {
+  get: function() {
+    return "1";
+  },
+  configurable: true
+});
+
+Array.prototype.reduceRight.call(child, callbackfn, "initialValue");
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-i-14.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-i-14.js
new file mode 100644
index 0000000000..5399501a79
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-i-14.js
@@ -0,0 +1,39 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - element to be retrieved is own
+    accessor property that overrides an inherited accessor property on
+    an Array
+---*/
+
+var testResult = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx === 1) {
+    testResult = (curVal === "1");
+  }
+}
+
+Object.defineProperty(Array.prototype, "1", {
+  get: function() {
+    return 11;
+  },
+  configurable: true
+});
+
+var arr = [0, , 2];
+
+Object.defineProperty(arr, "1", {
+  get: function() {
+    return "1";
+  },
+  configurable: true
+});
+arr.reduceRight(callbackfn, "initialValue");
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-i-15.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-i-15.js
new file mode 100644
index 0000000000..2a3000a8f5
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-i-15.js
@@ -0,0 +1,41 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - element to be retrieved is inherited
+    accessor property on an Array-like object
+---*/
+
+var testResult = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx === 1) {
+    testResult = (curVal === 1);
+  }
+}
+
+var proto = {
+  0: 0,
+  2: 2
+};
+
+Object.defineProperty(proto, "1", {
+  get: function() {
+    return 1;
+  },
+  configurable: true
+});
+
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+child.length = 3;
+
+Array.prototype.reduceRight.call(child, callbackfn, "initialValue");
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-i-16.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-i-16.js
new file mode 100644
index 0000000000..f26e6e7394
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-i-16.js
@@ -0,0 +1,32 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - element to be retrieved is inherited
+    accessor property on an Array
+---*/
+
+var testResult = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx === 1) {
+    testResult = (curVal === 1);
+  }
+}
+
+Object.defineProperty(Array.prototype, "1", {
+  get: function() {
+    return 1;
+  },
+  configurable: true
+});
+
+var arr = [0, , 2];
+
+arr.reduceRight(callbackfn, "initialValue");
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-i-17.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-i-17.js
new file mode 100644
index 0000000000..c444fe34b7
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-i-17.js
@@ -0,0 +1,34 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - element to be retrieved is own
+    accessor property without a get function on an Array-like object
+---*/
+
+var testResult = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx === 1) {
+    testResult = (typeof curVal === "undefined");
+  }
+}
+
+var obj = {
+  0: 0,
+  2: 2,
+  length: 3
+};
+
+Object.defineProperty(obj, "1", {
+  set: function() {},
+  configurable: true
+});
+
+Array.prototype.reduceRight.call(obj, callbackfn, "initialValue");
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-i-18.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-i-18.js
new file mode 100644
index 0000000000..ce4fc77c5e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-i-18.js
@@ -0,0 +1,30 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - element to be retrieved is own
+    accessor property without a get function on an Array
+---*/
+
+var testResult = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx === 1) {
+    testResult = (typeof curVal === "undefined");
+  }
+}
+
+var arr = [0, , 2];
+
+Object.defineProperty(arr, "1", {
+  set: function() {},
+  configurable: true
+});
+
+arr.reduceRight(callbackfn, "initialValue");
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-i-19.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-i-19.js
new file mode 100644
index 0000000000..416c2c5954
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-i-19.js
@@ -0,0 +1,36 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - element to be retrieved is own
+    accessor property without a get function that overrides an
+    inherited accessor property on an Array-like object
+---*/
+
+var testResult = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx === 1) {
+    testResult = (typeof curVal === "undefined");
+  }
+}
+
+Object.prototype[1] = 1;
+
+var obj = {
+  0: 0,
+  2: 2,
+  length: 3
+};
+Object.defineProperty(obj, "1", {
+  set: function() {},
+  configurable: true
+});
+
+Array.prototype.reduceRight.call(obj, callbackfn, "initialValue");
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-i-2.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-i-2.js
new file mode 100644
index 0000000000..111a399ce1
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-i-2.js
@@ -0,0 +1,24 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - element to be retrieved is own data
+    property on an Array
+---*/
+
+var testResult = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx === 1) {
+    testResult = (curVal === 1);
+  }
+}
+
+var arr = [0, 1, 2];
+arr.reduceRight(callbackfn, "initialValue");
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-i-20.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-i-20.js
new file mode 100644
index 0000000000..31a31547ff
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-i-20.js
@@ -0,0 +1,31 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - element to be retrieved is own
+    accessor property without a get function that overrides an
+    inherited accessor property on an Array
+---*/
+
+var testResult = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx === 1) {
+    testResult = (typeof curVal === "undefined");
+  }
+}
+
+Array.prototype[1] = 1;
+var arr = [0, , 2];
+Object.defineProperty(arr, "1", {
+  set: function() {},
+  configurable: true
+});
+
+arr.reduceRight(callbackfn, "initialValue");
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-i-21.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-i-21.js
new file mode 100644
index 0000000000..9b7bb4156e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-i-21.js
@@ -0,0 +1,39 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - element to be retrieved is inherited
+    accessor property without a get function on an Array-like object
+---*/
+
+var testResult = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx === 1) {
+    testResult = (typeof curVal === "undefined");
+  }
+}
+
+var proto = {
+  0: 0,
+  2: 2
+};
+
+Object.defineProperty(proto, "1", {
+  set: function() {},
+  configurable: true
+});
+
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+child.length = 3;
+
+Array.prototype.reduceRight.call(child, callbackfn, "initialValue");
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-i-22.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-i-22.js
new file mode 100644
index 0000000000..56e6e555ec
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-i-22.js
@@ -0,0 +1,30 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - element to be retrieved is inherited
+    accessor property without a get function on an Array
+---*/
+
+var testResult = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx === 1) {
+    testResult = (typeof curVal === "undefined");
+  }
+}
+
+Object.defineProperty(Array.prototype, "1", {
+  set: function() {},
+  configurable: true
+});
+
+var arr = [0, , 2];
+
+arr.reduceRight(callbackfn, "initialValue");
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-i-25.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-i-25.js
new file mode 100644
index 0000000000..ee8229e01a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-i-25.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - This object is the Arguments object
+    which implements its own property get method (number of arguments
+    is less than number of parameters)
+---*/
+
+var testResult = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx === 1) {
+    testResult = (curVal === 1);
+  }
+}
+
+var func = function(a, b, c) {
+  Array.prototype.reduceRight.call(arguments, callbackfn, "initialValue");
+};
+
+func(0, 1);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-i-26.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-i-26.js
new file mode 100644
index 0000000000..3c09c62954
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-i-26.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - This object is the Arguments object
+    which implements its own property get method (number of arguments
+    equals number of parameters)
+---*/
+
+var testResult = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx === 2) {
+    testResult = (curVal === 2);
+  }
+}
+
+var func = function(a, b, c) {
+  Array.prototype.reduceRight.call(arguments, callbackfn, "initialValue");
+};
+
+func(0, 1, 2);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-i-27.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-i-27.js
new file mode 100644
index 0000000000..e40ea92104
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-i-27.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - This object is the Arguments object
+    which implements its own property get method (number of arguments
+    is greater than number of parameters)
+---*/
+
+var testResult = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx === 3) {
+    testResult = (curVal === 3);
+  }
+}
+
+var func = function(a, b, c) {
+  Array.prototype.reduceRight.call(arguments, callbackfn, "initialValue");
+};
+
+func(0, 1, 2, 3);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-i-28.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-i-28.js
new file mode 100644
index 0000000000..731d345e51
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-i-28.js
@@ -0,0 +1,24 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight applied to String object, which
+    implements its own property get method
+---*/
+
+var testResult = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx === 1) {
+    testResult = (curVal === "1");
+  }
+}
+
+var str = new String("012");
+Array.prototype.reduceRight.call(str, callbackfn, "initialValue");
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-i-29.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-i-29.js
new file mode 100644
index 0000000000..efbfb7b503
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-i-29.js
@@ -0,0 +1,32 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight applied to Function object which
+    implements its own property get method
+---*/
+
+var testResult = false;
+var initialValue = 0;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx === 1) {
+    testResult = (curVal === 1);
+  }
+}
+
+var obj = function(a, b, c) {
+  return a + b + c;
+};
+obj[0] = 0;
+obj[1] = 1;
+obj[2] = 2;
+obj[3] = 3;
+
+Array.prototype.reduceRight.call(obj, callbackfn, initialValue);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-i-3.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-i-3.js
new file mode 100644
index 0000000000..7328d4f716
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-i-3.js
@@ -0,0 +1,38 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - element to be retrieved is own data
+    property that overrides an inherited data property on an
+    Array-like object
+---*/
+
+var testResult = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx === 1) {
+    testResult = (curVal === "1");
+  }
+}
+
+var proto = {
+  0: 10,
+  1: 11,
+  2: 12,
+  length: 2
+};
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+child[1] = "1";
+child[2] = "2";
+child.length = 3;
+
+Array.prototype.reduceRight.call(child, callbackfn, "initialValue");
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-i-30.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-i-30.js
new file mode 100644
index 0000000000..2a6cc75418
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-i-30.js
@@ -0,0 +1,45 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - element changed by getter on
+    previous iterations is observed on an Array
+---*/
+
+var testResult = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx === 1) {
+    testResult = (curVal === 1);
+  }
+}
+
+var arr = [, , ];
+var preIterVisible = false;
+
+Object.defineProperty(arr, "2", {
+  get: function() {
+    preIterVisible = true;
+    return 0;
+  },
+  configurable: true
+});
+
+Object.defineProperty(arr, "1", {
+  get: function() {
+    if (preIterVisible) {
+      return 1;
+    } else {
+      return "11";
+    }
+  },
+  configurable: true
+});
+
+arr.reduceRight(callbackfn, "initialValue");
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-i-31.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-i-31.js
new file mode 100644
index 0000000000..fd4ec5d6f8
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-i-31.js
@@ -0,0 +1,47 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - element changed by getter on
+    previous iterations is observed on an Array-like object
+---*/
+
+var testResult = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx === 1) {
+    testResult = (curVal === 1);
+  }
+}
+
+var obj = {
+  length: 3
+};
+var preIterVisible = false;
+
+Object.defineProperty(obj, "2", {
+  get: function() {
+    preIterVisible = true;
+    return 0;
+  },
+  configurable: true
+});
+
+Object.defineProperty(obj, "1", {
+  get: function() {
+    if (preIterVisible) {
+      return 1;
+    } else {
+      return "11";
+    }
+  },
+  configurable: true
+});
+
+Array.prototype.reduceRight.call(obj, callbackfn, "initialValue");
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-i-32.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-i-32.js
new file mode 100644
index 0000000000..0e29e03b4a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-i-32.js
@@ -0,0 +1,36 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - unnhandled exceptions happened in
+    getter terminate iteration on an Array-like object
+---*/
+
+var accessed = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx <= 1) {
+    accessed = true;
+  }
+}
+
+
+var obj = {
+  0: 0,
+  2: 2,
+  length: 3
+};
+Object.defineProperty(obj, "1", {
+  get: function() {
+    throw new RangeError("unhandle exception happened in getter");
+  },
+  configurable: true
+});
+assert.throws(RangeError, function() {
+  Array.prototype.reduceRight.call(obj, callbackfn, "initialValue");
+});
+assert.sameValue(accessed, false, 'accessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-i-33.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-i-33.js
new file mode 100644
index 0000000000..5d7b1271ba
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-i-33.js
@@ -0,0 +1,34 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - unnhandled exceptions happened in
+    getter terminate iteration on an Array
+---*/
+
+var accessed = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx <= 1) {
+    accessed = true;
+  }
+}
+
+var arr = [0, , 2];
+
+Object.defineProperty(arr, "1", {
+  get: function() {
+    throw new Test262Error("unhandle exception happened in getter");
+  },
+  configurable: true
+});
+
+assert.throws(Test262Error, function() {
+  arr.reduceRight(callbackfn, "initialValue");
+});
+
+assert.sameValue(accessed, false, 'accessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-i-4.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-i-4.js
new file mode 100644
index 0000000000..dfc17f3099
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-i-4.js
@@ -0,0 +1,24 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - element to be retrieved is own data
+    property that overrides an inherited data property on an Array
+---*/
+
+var testResult = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx === 1) {
+    testResult = (curVal === 1);
+  }
+}
+
+Array.prototype[1] = "11";
+[0, 1, 2].reduceRight(callbackfn, "initialValue");
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-i-5.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-i-5.js
new file mode 100644
index 0000000000..d45b839723
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-i-5.js
@@ -0,0 +1,44 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - element to be retrieved is own data
+    property that overrides an inherited accessor property on an
+    Array-like object
+---*/
+
+var testResult = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx === 0) {
+    testResult = (curVal === "0");
+  }
+}
+
+var proto = {};
+
+Object.defineProperty(proto, "0", {
+  get: function() {
+    return 10;
+  },
+  configurable: true
+});
+
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+child.length = 2;
+Object.defineProperty(child, "0", {
+  value: "0",
+  configurable: true
+});
+child[1] = "1";
+
+Array.prototype.reduceRight.call(child, callbackfn, "initialValue");
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-i-6.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-i-6.js
new file mode 100644
index 0000000000..3fab4c5323
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-i-6.js
@@ -0,0 +1,29 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - element to be retrieved is own data
+    property that overrides an inherited accessor property on an Array
+---*/
+
+var testResult = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx === 1) {
+    testResult = (curVal === 1);
+  }
+}
+
+Object.defineProperty(Array.prototype, "1", {
+  get: function() {
+    return "11";
+  },
+  configurable: true
+});
+[0, 1, 2].reduceRight(callbackfn, "initialValue");
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-i-7.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-i-7.js
new file mode 100644
index 0000000000..9ad5541f0d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-i-7.js
@@ -0,0 +1,34 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - element to be retrieved is inherited
+    data property on an Array-like object
+---*/
+
+var testResult = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx === 1) {
+    testResult = (curVal === 1);
+  }
+}
+
+var proto = {
+  0: 0,
+  1: 1,
+  2: 2
+};
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+child.length = 3;
+
+Array.prototype.reduceRight.call(child, callbackfn, "initialValue");
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-i-8.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-i-8.js
new file mode 100644
index 0000000000..8a5b29bd4d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-i-8.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - element to be retrieved is inherited
+    data property on an Array
+---*/
+
+var testResult = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx === 1) {
+    testResult = (curVal === 1);
+  }
+}
+
+Array.prototype[0] = 0;
+Array.prototype[1] = 1;
+Array.prototype[2] = 2;
+[, , , ].reduceRight(callbackfn, "initialValue");
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-i-9.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-i-9.js
new file mode 100644
index 0000000000..6fcb07c435
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-i-9.js
@@ -0,0 +1,35 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - element to be retrieved is own
+    accessor property on an Array-like object
+---*/
+
+var testResult = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx === 1) {
+    testResult = (curVal === 1);
+  }
+}
+
+var obj = {
+  0: 0,
+  2: 2,
+  length: 3
+};
+Object.defineProperty(obj, "1", {
+  get: function() {
+    return 1;
+  },
+  configurable: true
+});
+
+Array.prototype.reduceRight.call(obj, callbackfn, "initialValue");
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-ii-1.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-ii-1.js
new file mode 100644
index 0000000000..c08153cc3c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-ii-1.js
@@ -0,0 +1,23 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - callbackfn called with correct
+    parameters (initialvalue not passed)
+---*/
+
+function callbackfn(prevVal, curVal, idx, obj)
+{
+  if (idx + 1 < obj.length && obj[idx] === curVal && obj[idx + 1] === prevVal)
+    return curVal;
+  else
+    return false;
+}
+
+var arr = [0, 1, true, null, new Object(), "five"];
+
+assert.sameValue(arr.reduceRight(callbackfn), 0, 'arr.reduceRight(callbackfn)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-ii-10.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-ii-10.js
new file mode 100644
index 0000000000..bbd6a4e48f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-ii-10.js
@@ -0,0 +1,21 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - callbackfn is called with 1 formal
+    parameter
+---*/
+
+var called = 0;
+
+function callbackfn(prevVal) {
+  called++;
+  return prevVal;
+}
+
+assert.sameValue([11, 12].reduceRight(callbackfn, 100), 100, '[11, 12].reduceRight(callbackfn, 100)');
+assert.sameValue(called, 2, 'called');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-ii-11.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-ii-11.js
new file mode 100644
index 0000000000..7ae7d55ee5
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-ii-11.js
@@ -0,0 +1,23 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - callbackfn is called with 2 formal
+    parameter
+---*/
+
+var testResult = false;
+
+function callbackfn(prevVal, curVal) {
+  if (prevVal === 100) {
+    testResult = true;
+  }
+  return curVal > 10;
+}
+
+assert.sameValue([11].reduceRight(callbackfn, 100), true, '[11].reduceRight(callbackfn, 100)');
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-ii-12.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-ii-12.js
new file mode 100644
index 0000000000..fc2251aac1
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-ii-12.js
@@ -0,0 +1,25 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - callbackfn is called with 3 formal
+    parameter
+---*/
+
+var testResult = false;
+var arr = [11, 12, 13];
+var initVal = 6.99;
+
+function callbackfn(prevVal, curVal, idx) {
+  if (idx === 2) {
+    testResult = (prevVal === initVal);
+  }
+  return curVal > 10 && arguments[3][idx] === curVal;
+}
+
+assert.sameValue(arr.reduceRight(callbackfn, initVal), true, 'arr.reduceRight(callbackfn, initVal)');
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-ii-13.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-ii-13.js
new file mode 100644
index 0000000000..dadad8321b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-ii-13.js
@@ -0,0 +1,25 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - callbackfn is called with 4 formal
+    parameter
+---*/
+
+var arr = [11, 12, 13];
+var initVal = 6.99;
+var testResult = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx === 2) {
+    testResult = (prevVal === initVal);
+  }
+  return curVal > 10 && obj[idx] === curVal;
+}
+
+assert.sameValue(arr.reduceRight(callbackfn, initVal), true, 'arr.reduceRight(callbackfn, initVal)');
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-ii-14.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-ii-14.js
new file mode 100644
index 0000000000..0548a3bb8a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-ii-14.js
@@ -0,0 +1,15 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: Array.prototype.reduceRight - callbackfn uses arguments
+---*/
+
+function callbackfn() {
+  return arguments[0] === 100 && arguments[3][arguments[2]] === arguments[1];
+}
+
+assert.sameValue([11].reduceRight(callbackfn, 100), true, '[11].reduceRight(callbackfn, 100)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-ii-16.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-ii-16.js
new file mode 100644
index 0000000000..e0ce705a19
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-ii-16.js
@@ -0,0 +1,29 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - non-indexed properties are not
+    called on an Array-like object
+---*/
+
+var testResult = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (prevVal === 8 || curVal === 8) {
+    testResult = true;
+  }
+}
+
+var obj = {
+  0: 11,
+  10: 12,
+  non_index_property: 8,
+  length: 20
+};
+Array.prototype.reduceRight.call(obj, callbackfn, "initialValue");
+
+assert.sameValue(testResult, false, 'testResult');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-ii-17.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-ii-17.js
new file mode 100644
index 0000000000..7ed779a120
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-ii-17.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - 'accumulator' used for current
+    iteration is the result of previous iteration on an Array
+---*/
+
+var arr = [11, 12, 13];
+var testResult = true;
+var initVal = 6.99;
+var preResult = initVal;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (prevVal !== preResult) {
+    testResult = false;
+  }
+  preResult = curVal;
+  return curVal;
+}
+
+arr.reduceRight(callbackfn, initVal);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-ii-18.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-ii-18.js
new file mode 100644
index 0000000000..d6970a8ba3
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-ii-18.js
@@ -0,0 +1,27 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - 'accumulator' used for first
+    iteration is the value of 'initialValue' when it is present on an
+    Array
+---*/
+
+var arr = [11, 12];
+var testResult = false;
+var initVal = 6.99;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx === 1) {
+    testResult = (prevVal === initVal);
+  }
+  return curVal;
+}
+
+arr.reduceRight(callbackfn, initVal);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-ii-19.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-ii-19.js
new file mode 100644
index 0000000000..fdccf85eed
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-ii-19.js
@@ -0,0 +1,25 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - value of 'accumulator' used for
+    first iteration is the value of max index property which is not
+    undefined when 'initialValue' is not present on an Array
+---*/
+
+var arr = [11, 12, 13];
+var testResult = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx === 1) {
+    testResult = (prevVal === 13);
+  }
+  return curVal;
+}
+arr.reduceRight(callbackfn);
+
+assert(testResult, 'testResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-ii-2.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-ii-2.js
new file mode 100644
index 0000000000..4056b365a5
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-ii-2.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - callbackfn called with correct
+    parameters (initialvalue passed)
+---*/
+
+var bParCorrect = false;
+var arr = [0, 1, true, null, new Object(), "five"];
+var initialValue = 5.5;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx === obj.length - 1 && obj[idx] === curVal && prevVal === initialValue)
+    return curVal;
+  else if (idx + 1 < obj.length && obj[idx] === curVal && obj[idx + 1] === prevVal)
+    return curVal;
+  else
+    return false;
+}
+
+assert.sameValue(arr.reduceRight(callbackfn, initialValue), 0, 'arr.reduceRight(callbackfn, initialValue)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-ii-20.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-ii-20.js
new file mode 100644
index 0000000000..6881fc9712
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-ii-20.js
@@ -0,0 +1,24 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: Array.prototype.reduceRight - undefined can be used as accumulator
+---*/
+
+var accessed = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  accessed = true;
+  return typeof prevVal === "undefined";
+}
+
+var obj = {
+  0: 11,
+  length: 1
+};
+
+assert.sameValue(Array.prototype.reduceRight.call(obj, callbackfn, undefined), true, 'Array.prototype.reduceRight.call(obj, callbackfn, undefined)');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-ii-21.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-ii-21.js
new file mode 100644
index 0000000000..75598d0c82
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-ii-21.js
@@ -0,0 +1,24 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: Array.prototype.reduceRight - null can be used as accumulator
+---*/
+
+var accessed = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  accessed = true;
+  return prevVal === null;
+}
+
+var obj = {
+  0: 11,
+  length: 1
+};
+
+assert.sameValue(Array.prototype.reduceRight.call(obj, callbackfn, null), true, 'Array.prototype.reduceRight.call(obj, callbackfn, null)');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-ii-22.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-ii-22.js
new file mode 100644
index 0000000000..3128f0ca63
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-ii-22.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - boolean primitive can be used as
+    accumulator
+---*/
+
+var accessed = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  accessed = true;
+  return prevVal === false;
+}
+
+var obj = {
+  0: 11,
+  length: 1
+};
+
+assert.sameValue(Array.prototype.reduceRight.call(obj, callbackfn, false), true, 'Array.prototype.reduceRight.call(obj, callbackfn, false)');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-ii-23.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-ii-23.js
new file mode 100644
index 0000000000..cd427b7df5
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-ii-23.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - number primitive can be used as
+    accumulator
+---*/
+
+var accessed = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  accessed = true;
+  return prevVal === 12;
+}
+
+var obj = {
+  0: 11,
+  length: 1
+};
+
+assert.sameValue(Array.prototype.reduceRight.call(obj, callbackfn, 12), true, 'Array.prototype.reduceRight.call(obj, callbackfn, 12)');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-ii-24.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-ii-24.js
new file mode 100644
index 0000000000..92fb8532dd
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-ii-24.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - string primitive can be used as
+    accumulator
+---*/
+
+var accessed = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  accessed = true;
+  return prevVal === "hello_";
+}
+
+var obj = {
+  0: 11,
+  length: 1
+};
+
+assert.sameValue(Array.prototype.reduceRight.call(obj, callbackfn, "hello_"), true, 'Array.prototype.reduceRight.call(obj, callbackfn, "hello_")');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-ii-25.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-ii-25.js
new file mode 100644
index 0000000000..4880b72314
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-ii-25.js
@@ -0,0 +1,27 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - Function Object can be used as
+    accumulator
+---*/
+
+var accessed = false;
+var objFunction = function() {};
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  accessed = true;
+  return prevVal === objFunction;
+}
+
+var obj = {
+  0: 11,
+  length: 1
+};
+
+assert.sameValue(Array.prototype.reduceRight.call(obj, callbackfn, objFunction), true, 'Array.prototype.reduceRight.call(obj, callbackfn, objFunction)');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-ii-26.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-ii-26.js
new file mode 100644
index 0000000000..694ac40bda
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-ii-26.js
@@ -0,0 +1,27 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - Array Object can be used as
+    accumulator
+---*/
+
+var accessed = false;
+var objArray = [];
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  accessed = true;
+  return prevVal === objArray;
+}
+
+var obj = {
+  0: 11,
+  length: 1
+};
+
+assert.sameValue(Array.prototype.reduceRight.call(obj, callbackfn, objArray), true, 'Array.prototype.reduceRight.call(obj, callbackfn, objArray)');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-ii-27.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-ii-27.js
new file mode 100644
index 0000000000..68c67bd92f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-ii-27.js
@@ -0,0 +1,27 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - String Object can be used as
+    accumulator
+---*/
+
+var accessed = false;
+var objString = new String();
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  accessed = true;
+  return prevVal === objString;
+}
+
+var obj = {
+  0: 11,
+  length: 1
+};
+
+assert.sameValue(Array.prototype.reduceRight.call(obj, callbackfn, objString), true, 'Array.prototype.reduceRight.call(obj, callbackfn, objString)');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-ii-28.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-ii-28.js
new file mode 100644
index 0000000000..47fb54af5c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-ii-28.js
@@ -0,0 +1,27 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - Boolean Object can be used as
+    accumulator
+---*/
+
+var accessed = false;
+var objBoolean = new Boolean();
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  accessed = true;
+  return prevVal === objBoolean;
+}
+
+var obj = {
+  0: 11,
+  length: 1
+};
+
+assert.sameValue(Array.prototype.reduceRight.call(obj, callbackfn, objBoolean), true, 'Array.prototype.reduceRight.call(obj, callbackfn, objBoolean)');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-ii-29.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-ii-29.js
new file mode 100644
index 0000000000..4540656a7d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-ii-29.js
@@ -0,0 +1,27 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - Number Object can be used as
+    accumulator
+---*/
+
+var accessed = false;
+var objNumber = new Number();
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  accessed = true;
+  return prevVal === objNumber;
+}
+
+var obj = {
+  0: 11,
+  length: 1
+};
+
+assert.sameValue(Array.prototype.reduceRight.call(obj, callbackfn, objNumber), true, 'Array.prototype.reduceRight.call(obj, callbackfn, objNumber)');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-ii-3.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-ii-3.js
new file mode 100644
index 0000000000..c31fa3cd0d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-ii-3.js
@@ -0,0 +1,24 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: Array.prototype.reduceRight - callbackfn takes 4 arguments
+---*/
+
+var bCalled = false;
+
+function callbackfn(prevVal, curVal, idx, obj)
+{
+  bCalled = true;
+  if (prevVal === true && arguments.length === 4)
+    return true;
+  else
+    return false;
+}
+var arr = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9];
+
+assert.sameValue(arr.reduceRight(callbackfn, true), true, 'arr.reduceRight(callbackfn,true)');
+assert.sameValue(bCalled, true, 'bCalled');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-ii-30.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-ii-30.js
new file mode 100644
index 0000000000..35ea67bb90
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-ii-30.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - the Math Object can be used as
+    accumulator
+---*/
+
+var accessed = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  accessed = true;
+  return prevVal === Math;
+}
+
+var obj = {
+  0: 11,
+  length: 1
+};
+
+assert.sameValue(Array.prototype.reduceRight.call(obj, callbackfn, Math), true, 'Array.prototype.reduceRight.call(obj, callbackfn, Math)');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-ii-31.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-ii-31.js
new file mode 100644
index 0000000000..76acefe853
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-ii-31.js
@@ -0,0 +1,27 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - Date Object can be used as
+    accumulator
+---*/
+
+var accessed = false;
+var objDate = new Date();
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  accessed = true;
+  return prevVal === objDate;
+}
+
+var obj = {
+  0: 11,
+  length: 1
+};
+
+assert.sameValue(Array.prototype.reduceRight.call(obj, callbackfn, objDate), true, 'Array.prototype.reduceRight.call(obj, callbackfn, objDate)');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-ii-32.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-ii-32.js
new file mode 100644
index 0000000000..f00a3547d0
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-ii-32.js
@@ -0,0 +1,27 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - RegExp Object can be used as
+    accumulator
+---*/
+
+var accessed = false;
+var objRegExp = new RegExp();
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  accessed = true;
+  return prevVal === objRegExp;
+}
+
+var obj = {
+  0: 11,
+  length: 1
+};
+
+assert.sameValue(Array.prototype.reduceRight.call(obj, callbackfn, objRegExp), true, 'Array.prototype.reduceRight.call(obj, callbackfn, objRegExp)');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-ii-33.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-ii-33.js
new file mode 100644
index 0000000000..ea4e069518
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-ii-33.js
@@ -0,0 +1,24 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: Array.prototype.reduceRight - the JSON can be used as accumulator
+---*/
+
+var accessed = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  accessed = true;
+  return prevVal === JSON;
+}
+
+var obj = {
+  0: 11,
+  length: 1
+};
+
+assert.sameValue(Array.prototype.reduceRight.call(obj, callbackfn, JSON), true, 'Array.prototype.reduceRight.call(obj, callbackfn, JSON)');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-ii-34.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-ii-34.js
new file mode 100644
index 0000000000..bc815f1950
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-ii-34.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - Error Object can be used as
+    accumulator
+---*/
+
+var accessed = false;
+var objError = new RangeError();
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  accessed = true;
+  return prevVal === objError;
+}
+
+var obj = {
+  0: 11,
+  length: 1
+};
+
+
+assert.sameValue(Array.prototype.reduceRight.call(obj, callbackfn, objError), true, 'Array.prototype.reduceRight.call(obj, callbackfn, objError)');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-ii-35.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-ii-35.js
new file mode 100644
index 0000000000..db8071bbeb
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-ii-35.js
@@ -0,0 +1,31 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - the Arguments object can be used as
+    accumulator
+---*/
+
+var accessed = false;
+var arg;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  accessed = true;
+  return prevVal === arg;
+}
+
+var obj = {
+  0: 11,
+  length: 1
+};
+
+(function fun() {
+  arg = arguments;
+}(10, 11, 12, 13));
+
+assert.sameValue(Array.prototype.reduceRight.call(obj, callbackfn, arg), true, 'Array.prototype.reduceRight.call(obj, callbackfn, arg)');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-ii-37.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-ii-37.js
new file mode 100644
index 0000000000..8d56e9e95e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-ii-37.js
@@ -0,0 +1,27 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - the global object can be used as
+    accumulator
+---*/
+
+var global = this;
+var accessed = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  accessed = true;
+  return prevVal === global;
+}
+
+var obj = {
+  0: 11,
+  length: 1
+};
+
+assert.sameValue(Array.prototype.reduceRight.call(obj, callbackfn, this), true, 'Array.prototype.reduceRight.call(obj, callbackfn, this)');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-ii-4-s.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-ii-4-s.js
new file mode 100644
index 0000000000..1f1d3b7667
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-ii-4-s.js
@@ -0,0 +1,24 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - undefined passed as thisValue to
+    strict callbackfn
+flags: [noStrict]
+---*/
+
+var innerThisCorrect = false;
+
+function callbackfn(prevVal, curVal, idx, obj)
+{
+  "use strict";
+  innerThisCorrect = this === undefined;
+  return true;
+}
+[0].reduceRight(callbackfn, true);
+
+assert(innerThisCorrect, 'innerThisCorrect !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-ii-4.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-ii-4.js
new file mode 100644
index 0000000000..099513a31a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-ii-4.js
@@ -0,0 +1,29 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - k values are passed in acending
+    numeric order
+---*/
+
+var arr = [0, 1, 2, 3, 4, 5];
+var lastIdx = arr.length - 1;
+var accessed = false;
+var result = true;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  accessed = true;
+  if (lastIdx !== idx) {
+    result = false;
+  } else {
+    lastIdx--;
+  }
+}
+arr.reduceRight(callbackfn, 1);
+
+assert(result, 'result !== true');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-ii-5.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-ii-5.js
new file mode 100644
index 0000000000..25c1e0733a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-ii-5.js
@@ -0,0 +1,36 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - k values are accessed during each
+    iteration and not prior to starting the loop on an Array
+---*/
+
+var arr = [11, 12, 13, 14];
+var kIndex = [];
+var result = true;
+var called = 0;
+
+//By below way, we could verify that k would be setted as 0, 1, ..., length - 1 in order, and each value will be setted one time.
+function callbackfn(preVal, curVal, idx, o) {
+  //Each position should be visited one time, which means k is accessed one time during iterations.
+  called++;
+  if (typeof kIndex[idx] === "undefined") {
+    //when current position is visited, its next index should has been visited.
+    if (idx !== arr.length - 1 && typeof kIndex[idx + 1] === "undefined") {
+      result = false;
+    }
+    kIndex[idx] = 1;
+  } else {
+    result = false;
+  }
+}
+
+arr.reduceRight(callbackfn, 1);
+
+assert(result, 'result !== true');
+assert.sameValue(called, 4, 'called');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-ii-7.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-ii-7.js
new file mode 100644
index 0000000000..e6028af07f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-ii-7.js
@@ -0,0 +1,35 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - unhandled exceptions happened in
+    callbackfn terminate iteration
+---*/
+
+var accessed = false;
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  if (idx < 10) {
+    accessed = true;
+  }
+  if (idx === 10) {
+    throw new Test262Error("Exception occurred in callbackfn");
+  }
+}
+
+var obj = {
+  0: 11,
+  4: 10,
+  10: 8,
+  length: 20
+};
+
+assert.throws(Test262Error, function() {
+  Array.prototype.reduceRight.call(obj, callbackfn, 1);
+});
+
+assert.sameValue(accessed, false, 'accessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-ii-8.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-ii-8.js
new file mode 100644
index 0000000000..16d476bb34
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-ii-8.js
@@ -0,0 +1,29 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - element changed by callbackfn on
+    previous iterations is observed
+---*/
+
+var accessed = false;
+var obj = {
+  0: 11,
+  1: 12,
+  length: 2
+};
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  accessed = true;
+  if (idx === 1) {
+    obj[idx - 1] = 8;
+  }
+  return curVal > 10;
+}
+
+assert.sameValue(Array.prototype.reduceRight.call(obj, callbackfn, 1), false, 'Array.prototype.reduceRight.call(obj, callbackfn, 1)');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-ii-9.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-ii-9.js
new file mode 100644
index 0000000000..5bfbc4aeeb
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-c-ii-9.js
@@ -0,0 +1,21 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+    Array.prototype.reduceRight - callbackfn is called with 0 formal
+    parameter
+---*/
+
+var called = 0;
+
+function callbackfn() {
+  called++;
+  return true;
+}
+
+assert.sameValue([11, 12].reduceRight(callbackfn, 11), true, '[11, 12].reduceRight(callbackfn, 11)');
+assert.sameValue(called, 2, 'called');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/browser.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/browser.js
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/call-with-boolean.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/call-with-boolean.js
new file mode 100644
index 0000000000..a419bcf4e3
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/call-with-boolean.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2020 Rick Waldron.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceRight
+description: Array.prototype.reduceRight applied to boolean primitive
+---*/
+
+assert.sameValue(
+  Array.prototype.reduceRight.call(true, () => {}, -1),
+  -1,
+  'Array.prototype.reduceRight.call(true, () => {}, -1) must return -1'
+);
+assert.sameValue(
+  Array.prototype.reduceRight.call(false, () => {}, -1),
+  -1,
+  'Array.prototype.reduceRight.call(false, () => {}, -1) must return -1'
+);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/callbackfn-resize-arraybuffer.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/callbackfn-resize-arraybuffer.js
new file mode 100644
index 0000000000..8704bccee9
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/callbackfn-resize-arraybuffer.js
@@ -0,0 +1,81 @@
+// |reftest| shell-option(--enable-arraybuffer-resizable) skip-if(!ArrayBuffer.prototype.resize||!xulRuntime.shell) -- resizable-arraybuffer is not enabled unconditionally, requires shell-options
+// Copyright (C) 2021 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.reduceright
+description: TypedArray instance buffer can be resized during iteration
+includes: [testTypedArray.js, compareArray.js]
+features: [TypedArray, resizable-arraybuffer]
+---*/
+
+testWithTypedArrayConstructors(function(TA) {
+  var BPE = TA.BYTES_PER_ELEMENT;
+  var buffer = new ArrayBuffer(BPE * 3, {maxByteLength: BPE * 3});
+  var sample = new TA(buffer);
+  var expectedPrevsShrink, expectedNextsShrink, expectedIndicesShrink, expectedArraysShrink;
+  var expectedPrevsGrow, expectedNextsGrow, expectedIndicesGrow, expectedArraysGrow;
+  var prevs, nexts, indices, arrays, result;
+
+  prevs = [];
+  nexts = [];
+  indices = [];
+  arrays = [];
+  result = Array.prototype.reduceRight.call(sample, function(prev, next, index, array) {
+    if (prevs.length === 0) {
+      try {
+        buffer.resize(BPE);
+        expectedPrevsShrink = [262, 2];
+        expectedNextsShrink = [0, 0];
+        expectedIndicesShrink = [2, 0];
+        expectedArraysShrink = [sample, sample];
+        expectedPrevsGrow = [262];
+        expectedNextsGrow = [0];
+        expectedIndicesGrow = [0];
+        expectedArraysGrow = [sample];
+      } catch (_) {
+        expectedPrevsShrink = expectedPrevsGrow = [262, 2, 1];
+        expectedNextsShrink = expectedNextsGrow = [0, 0, 0];
+        expectedIndicesShrink = expectedIndicesGrow = [2, 1, 0];
+        expectedArraysShrink = expectedArraysGrow = [sample, sample, sample];
+      }
+    }
+
+    prevs.push(prev);
+    nexts.push(next);
+    indices.push(index);
+    arrays.push(array);
+    return index;
+  }, 262);
+
+  assert.compareArray(prevs, expectedPrevsShrink, 'prevs (shrink)');
+  assert.compareArray(nexts, expectedNextsShrink, 'nexts (shrink)');
+  assert.compareArray(indices, expectedIndicesShrink, 'indices (shrink)');
+  assert.compareArray(arrays, expectedArraysShrink, 'arrays (shrink)');
+  assert.sameValue(result, 0, 'result (shrink)');
+
+  prevs = [];
+  nexts = [];
+  indices = [];
+  arrays = [];
+  result = Array.prototype.reduceRight.call(sample, function(prev, next, index, array) {
+    if (prevs.length === 0) {
+      try {
+        buffer.resize(3 * BPE);
+      } catch (_) {}
+    }
+
+    prevs.push(prev);
+    nexts.push(next);
+    indices.push(index);
+    arrays.push(array);
+    return index;
+  }, 262);
+
+  assert.compareArray(prevs, expectedPrevsGrow, 'prevs (grow)');
+  assert.compareArray(nexts, expectedNextsGrow, 'nexts (grow)');
+  assert.compareArray(indices, expectedIndicesGrow, 'indices (grow)');
+  assert.compareArray(arrays, expectedArraysGrow, 'arrays (grow)');
+  assert.sameValue(result, expectedIndicesGrow[expectedIndicesGrow.length - 1], 'result (grow)');
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/length-near-integer-limit.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/length-near-integer-limit.js
new file mode 100644
index 0000000000..165ecebf1d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/length-near-integer-limit.js
@@ -0,0 +1,59 @@
+// Copyright (C) 2020 Alexey Shvayka. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+  Elements are processed in an array-like object
+  whose "length" property is near the integer limit.
+info: |
+  Array.prototype.reduceRight ( callbackfn [ , initialValue ] )
+
+  1. Let O be ? ToObject(this value).
+  2. Let len be ? LengthOfArrayLike(O).
+  [...]
+  9. Repeat, while k ≥ 0
+    a. Let Pk be ! ToString(k).
+    b. Let kPresent be ? HasProperty(O, Pk).
+    c. If kPresent is true, then
+      i. Let kValue be ? Get(O, Pk).
+      ii. Set accumulator to ? Call(callbackfn, undefined, « accumulator, kValue, k, O »).
+    [...]
+includes: [compareArray.js]
+---*/
+
+var arrayLike = {
+  length: Number.MAX_SAFE_INTEGER,
+};
+
+arrayLike[Number.MAX_SAFE_INTEGER - 1] = 1;
+arrayLike[Number.MAX_SAFE_INTEGER - 3] = 3;
+
+var accumulator = function(acc, el, index) {
+  acc.push([el, index]);
+
+  if (el === 3) {
+    throw acc;
+  }
+
+  return acc;
+};
+
+try {
+  Array.prototype.reduceRight.call(arrayLike, accumulator, []);
+  throw new Test262Error("should not be called");
+} catch (acc) {
+  assert.sameValue(acc.length, 2, 'The value of acc.length is expected to be 2');
+  assert.compareArray(
+    acc[0],
+    [1, Number.MAX_SAFE_INTEGER - 1],
+    'The value of acc[0] is expected to be [1, Number.MAX_SAFE_INTEGER - 1]'
+  );
+  assert.compareArray(
+    acc[1],
+    [3, Number.MAX_SAFE_INTEGER - 3],
+    'The value of acc[1] is expected to be [3, Number.MAX_SAFE_INTEGER - 3]'
+  );
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/length.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/length.js
new file mode 100644
index 0000000000..4f02036c8d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/length.js
@@ -0,0 +1,30 @@
+// Copyright (C) 2017 Leo Balter. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+  The "length" property of Array.prototype.reduceRight
+info: |
+  17 ECMAScript Standard Built-in Objects
+
+  Every built-in function object, including constructors, has a length property
+  whose value is an integer. Unless otherwise specified, this value is equal to
+  the largest number of named arguments shown in the subclause headings for the
+  function description. Optional parameters (which are indicated with brackets:
+  [ ]) or rest parameters (which are shown using the form «...name») are not
+  included in the default argument count.
+
+  Unless otherwise specified, the length property of a built-in function object
+  has the attributes { [[Writable]]: false, [[Enumerable]]: false,
+    [[Configurable]]: true }.
+includes: [propertyHelper.js]
+---*/
+
+assert.sameValue(Array.prototype.reduceRight.length, 1);
+
+verifyNotEnumerable(Array.prototype.reduceRight, 'length');
+verifyNotWritable(Array.prototype.reduceRight, 'length');
+verifyConfigurable(Array.prototype.reduceRight, 'length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/name.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/name.js
new file mode 100644
index 0000000000..c3e90f6957
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/name.js
@@ -0,0 +1,28 @@
+// Copyright (C) 2015 André Bargull. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+  Array.prototype.reduceRight.name is "reduceRight".
+info: |
+  Array.prototype.reduceRight ( callbackfn [ , initialValue ] )
+
+  17 ECMAScript Standard Built-in Objects:
+    Every built-in Function object, including constructors, that is not
+    identified as an anonymous function has a name property whose value
+    is a String.
+
+    Unless otherwise specified, the name property of a built-in Function
+    object, if it exists, has the attributes { [[Writable]]: false,
+    [[Enumerable]]: false, [[Configurable]]: true }.
+includes: [propertyHelper.js]
+---*/
+
+assert.sameValue(Array.prototype.reduceRight.name, "reduceRight");
+
+verifyNotEnumerable(Array.prototype.reduceRight, "name");
+verifyNotWritable(Array.prototype.reduceRight, "name");
+verifyConfigurable(Array.prototype.reduceRight, "name");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/not-a-constructor.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/not-a-constructor.js
new file mode 100644
index 0000000000..77e7e825b3
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/not-a-constructor.js
@@ -0,0 +1,35 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Array.prototype.reduceRight does not implement [[Construct]], is not new-able
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+
+  sec-evaluatenew
+
+  ...
+  7. If IsConstructor(constructor) is false, throw a TypeError exception.
+  ...
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Array.prototype.reduceRight),
+  false,
+  'isConstructor(Array.prototype.reduceRight) must return false'
+);
+
+assert.throws(TypeError, () => {
+  new Array.prototype.reduceRight(() => {}, []);
+}, '`new Array.prototype.reduceRight(() => {}, [])` throws TypeError');
+
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/prop-desc.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/prop-desc.js
new file mode 100644
index 0000000000..98de001a8d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/prop-desc.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2017 Leo Balter. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reduceright
+description: >
+  "reduceRight" property of Array.prototype
+info: |
+  17 ECMAScript Standard Built-in Objects
+  
+  Every other data property described in clauses 18 through 26 and in Annex B.2
+  has the attributes { [[Writable]]: true, [[Enumerable]]: false,
+    [[Configurable]]: true } unless otherwise specified.
+includes: [propertyHelper.js]
+---*/
+
+assert.sameValue(typeof Array.prototype.reduceRight, 'function', 'typeof');
+
+verifyNotEnumerable(Array.prototype, "reduceRight");
+verifyWritable(Array.prototype, "reduceRight");
+verifyConfigurable(Array.prototype, "reduceRight");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/shell.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/shell.js
new file mode 100644
index 0000000000..05fecd6ef1
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/shell.js
@@ -0,0 +1,161 @@
+// GENERATED, DO NOT EDIT
+// file: testTypedArray.js
+// Copyright (C) 2015 André Bargull. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+description: |
+    Collection of functions used to assert the correctness of TypedArray objects.
+defines:
+  - floatArrayConstructors
+  - nonClampedIntArrayConstructors
+  - intArrayConstructors
+  - typedArrayConstructors
+  - TypedArray
+  - testWithTypedArrayConstructors
+  - nonAtomicsFriendlyTypedArrayConstructors
+  - testWithAtomicsFriendlyTypedArrayConstructors
+  - testWithNonAtomicsFriendlyTypedArrayConstructors
+  - testTypedArrayConversions
+---*/
+
+var floatArrayConstructors = [
+  Float64Array,
+  Float32Array
+];
+
+var nonClampedIntArrayConstructors = [
+  Int32Array,
+  Int16Array,
+  Int8Array,
+  Uint32Array,
+  Uint16Array,
+  Uint8Array
+];
+
+var intArrayConstructors = nonClampedIntArrayConstructors.concat([Uint8ClampedArray]);
+
+// Float16Array is a newer feature
+// adding it to this list unconditionally would cause implementations lacking it to fail every test which uses it
+if (typeof Float16Array !== 'undefined') {
+  floatArrayConstructors.push(Float16Array);
+}
+
+/**
+ * Array containing every non-bigint typed array constructor.
+ */
+
+var typedArrayConstructors = floatArrayConstructors.concat(intArrayConstructors);
+
+/**
+ * The %TypedArray% intrinsic constructor function.
+ */
+var TypedArray = Object.getPrototypeOf(Int8Array);
+
+/**
+ * Callback for testing a typed array constructor.
+ *
+ * @callback typedArrayConstructorCallback
+ * @param {Function} Constructor the constructor object to test with.
+ */
+
+/**
+ * Calls the provided function for every typed array constructor.
+ *
+ * @param {typedArrayConstructorCallback} f - the function to call for each typed array constructor.
+ * @param {Array} selected - An optional Array with filtered typed arrays
+ */
+function testWithTypedArrayConstructors(f, selected) {
+  var constructors = selected || typedArrayConstructors;
+  for (var i = 0; i < constructors.length; ++i) {
+    var constructor = constructors[i];
+    try {
+      f(constructor);
+    } catch (e) {
+      e.message += " (Testing with " + constructor.name + ".)";
+      throw e;
+    }
+  }
+}
+
+var nonAtomicsFriendlyTypedArrayConstructors = floatArrayConstructors.concat([Uint8ClampedArray]);
+/**
+ * Calls the provided function for every non-"Atomics Friendly" typed array constructor.
+ *
+ * @param {typedArrayConstructorCallback} f - the function to call for each typed array constructor.
+ * @param {Array} selected - An optional Array with filtered typed arrays
+ */
+function testWithNonAtomicsFriendlyTypedArrayConstructors(f) {
+  testWithTypedArrayConstructors(f, nonAtomicsFriendlyTypedArrayConstructors);
+}
+
+/**
+ * Calls the provided function for every "Atomics Friendly" typed array constructor.
+ *
+ * @param {typedArrayConstructorCallback} f - the function to call for each typed array constructor.
+ * @param {Array} selected - An optional Array with filtered typed arrays
+ */
+function testWithAtomicsFriendlyTypedArrayConstructors(f) {
+  testWithTypedArrayConstructors(f, [
+    Int32Array,
+    Int16Array,
+    Int8Array,
+    Uint32Array,
+    Uint16Array,
+    Uint8Array,
+  ]);
+}
+
+/**
+ * Helper for conversion operations on TypedArrays, the expected values
+ * properties are indexed in order to match the respective value for each
+ * TypedArray constructor
+ * @param  {Function} fn - the function to call for each constructor and value.
+ *                         will be called with the constructor, value, expected
+ *                         value, and a initial value that can be used to avoid
+ *                         a false positive with an equivalent expected value.
+ */
+function testTypedArrayConversions(byteConversionValues, fn) {
+  var values = byteConversionValues.values;
+  var expected = byteConversionValues.expected;
+
+  testWithTypedArrayConstructors(function(TA) {
+    var name = TA.name.slice(0, -5);
+
+    return values.forEach(function(value, index) {
+      var exp = expected[name][index];
+      var initial = 0;
+      if (exp === 0) {
+        initial = 1;
+      }
+      fn(TA, value, exp, initial);
+    });
+  });
+}
+
+/**
+ * Checks if the given argument is one of the float-based TypedArray constructors.
+ *
+ * @param {constructor} ctor - the value to check
+ * @returns {boolean}
+ */
+function isFloatTypedArrayConstructor(arg) {
+  return floatArrayConstructors.indexOf(arg) !== -1;
+}
+
+/**
+ * Determines the precision of the given float-based TypedArray constructor.
+ *
+ * @param {constructor} ctor - the value to check
+ * @returns {string} "half", "single", or "double" for Float16Array, Float32Array, and Float64Array respectively.
+ */
+function floatTypedArrayConstructorPrecision(FA) {
+  if (typeof Float16Array !== "undefined" && FA === Float16Array) {
+    return "half";
+  } else if (FA === Float32Array) {
+    return "single";
+  } else if (FA === Float64Array) {
+    return "double";
+  } else {
+    throw new Error("Malformed test - floatTypedArrayConstructorPrecision called with non-float TypedArray");
+  }
+}
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reverse/S15.4.4.8_A1_T1.js b/js/src/tests/test262/built-ins/Array/prototype/reverse/S15.4.4.8_A1_T1.js
new file mode 100644
index 0000000000..c3c857081c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reverse/S15.4.4.8_A1_T1.js
@@ -0,0 +1,43 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    The elements of the array are rearranged so as to reverse their order.
+    The object is returned as the result of the call
+esid: sec-array.prototype.reverse
+description: Checking case when reverse is given no arguments or one argument
+---*/
+
+var x = [];
+var reverse = x.reverse();
+if (reverse !== x) {
+  throw new Test262Error('#1: x = []; x.reverse() === x. Actual: ' + (reverse));
+}
+
+x = [];
+x[0] = 1;
+var reverse = x.reverse();
+if (reverse !== x) {
+  throw new Test262Error('#2: x = []; x[0] = 1; x.reverse() === x. Actual: ' + (reverse));
+}
+
+x = new Array(1, 2);
+var reverse = x.reverse();
+if (reverse !== x) {
+  throw new Test262Error('#3: x = new Array(1,2); x.reverse() === x. Actual: ' + (reverse));
+}
+
+if (x[0] !== 2) {
+  throw new Test262Error('#4: x = new Array(1,2); x.reverse(); x[0] === 2. Actual: ' + (x[0]));
+}
+
+if (x[1] !== 1) {
+  throw new Test262Error('#5: x = new Array(1,2); x.reverse(); x[1] === 1. Actual: ' + (x[1]));
+}
+
+if (x.length !== 2) {
+  throw new Test262Error('#6: x = new Array(1,2); x.reverse(); x.length === 2. Actual: ' + (x.length));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reverse/S15.4.4.8_A1_T2.js b/js/src/tests/test262/built-ins/Array/prototype/reverse/S15.4.4.8_A1_T2.js
new file mode 100644
index 0000000000..17d693192f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reverse/S15.4.4.8_A1_T2.js
@@ -0,0 +1,108 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    The elements of the array are rearranged so as to reverse their order.
+    The object is returned as the result of the call
+esid: sec-array.prototype.reverse
+description: Checking this algorithm, elements are objects and primitives
+---*/
+
+var x = [];
+x[0] = true;
+x[2] = Infinity;
+x[4] = undefined;
+x[5] = undefined;
+x[8] = "NaN";
+x[9] = "-1";
+
+var reverse = x.reverse();
+if (reverse !== x) {
+  throw new Test262Error('#1: x = []; x[0] = true; x[2] = Infinity; x[4] = undefined; x[5] = undefined; x[8] = "NaN"; x[9] = "-1"; x.reverse() === x. Actual: ' + (reverse));
+}
+
+if (x[0] !== "-1") {
+  throw new Test262Error('#2: x = []; x[0] = true; x[2] = Infinity; x[4] = undefined; x[5] = undefined; x[8] = "NaN"; x[9] = "-1"; x.reverse(); x[0] === "-1". Actual: ' + (x[0]));
+}
+
+if (x[1] !== "NaN") {
+  throw new Test262Error('#3: x = []; x[0] = true; x[2] = Infinity; x[4] = undefined; x[5] = undefined; x[8] = "NaN"; x[9] = "-1"; x.reverse(); x[1] === "NaN". Actual: ' + (x[1]));
+}
+
+if (x[2] !== undefined) {
+  throw new Test262Error('#4: x = []; x[0] = true; x[2] = Infinity; x[4] = undefined; x[5] = undefined; x[8] = "NaN"; x[9] = "-1"; x.reverse(); x[2] === undefined. Actual: ' + (x[2]));
+}
+
+if (x[3] !== undefined) {
+  throw new Test262Error('#5: x = []; x[0] = true; x[2] = Infinity; x[4] = undefined; x[5] = undefined; x[8] = "NaN"; x[9] = "-1"; x.reverse(); x[3] === undefined. Actual: ' + (x[3]));
+}
+
+if (x[4] !== undefined) {
+  throw new Test262Error('#6: x = []; x[0] = true; x[2] = Infinity; x[4] = undefined; x[5] = undefined; x[8] = "NaN"; x[9] = "-1"; x.reverse(); x[4] === undefined. Actual: ' + (x[4]));
+}
+
+if (x[5] !== undefined) {
+  throw new Test262Error('#7: x = []; x[0] = true; x[2] = Infinity; x[4] = undefined; x[5] = undefined; x[8] = "NaN"; x[9] = "-1"; x.reverse(); x[5] === undefined. Actual: ' + (x[5]));
+}
+
+if (x[6] !== undefined) {
+  throw new Test262Error('#8: x = []; x[0] = true; x[2] = Infinity; x[4] = undefined; x[5] = undefined; x[8] = "NaN"; x[9] = "-1"; x.reverse(); x[6] === undefined. Actual: ' + (x[6]));
+}
+
+if (x[7] !== Infinity) {
+  throw new Test262Error('#9: x = []; x[0] = true; x[2] = Infinity; x[4] = undefined; x[5] = undefined; x[8] = "NaN"; x[9] = "-1"; x.reverse(); x[7] === Infinity. Actual: ' + (x[7]));
+}
+
+if (x[8] !== undefined) {
+  throw new Test262Error('#10: x = []; x[0] = true; x[2] = Infinity; x[4] = undefined; x[5] = undefined; x[8] = "NaN"; x[9] = "-1"; x.reverse(); x[8] === undefined. Actual: ' + (x[8]));
+}
+
+if (x[9] !== true) {
+  throw new Test262Error('#11: x = []; x[0] = true; x[2] = Infinity; x[4] = undefined; x[5] = undefined; x[8] = "NaN"; x[9] = "-1"; x.reverse(); x[9] === true. Actual: ' + (x[9]));
+}
+
+x.length = 9;
+
+var reverse = x.reverse();
+if (reverse !== x) {
+  throw new Test262Error('#1: x = []; x[0] = true; x[2] = Infinity; x[4] = undefined; x[5] = undefined; x[8] = "NaN"; x[9] = "-1"; x.reverse(); x.length = 9; x.reverse() === x. Actual: ' + (reverse));
+}
+
+if (x[0] !== undefined) {
+  throw new Test262Error('#12: x = []; x[0] = true; x[2] = Infinity; x[4] = undefined; x[5] = undefined; x[8] = "NaN"; x[9] = "-1"; x.reverse(); x.length = 9; x.reverse(); x[0] === undefined. Actual: ' + (x[0]));
+}
+
+if (x[1] !== Infinity) {
+  throw new Test262Error('#13: x = []; x[0] = true; x[2] = Infinity; x[4] = undefined; x[5] = undefined; x[8] = "NaN"; x[9] = "-1"; x.reverse(); x.length = 9; x.reverse(); x[1] === Infinity. Actual: ' + (x[1]));
+}
+
+if (x[2] !== undefined) {
+  throw new Test262Error('#14: x = []; x[0] = true; x[2] = Infinity; x[4] = undefined; x[5] = undefined; x[8] = "NaN"; x[9] = "-1"; x.reverse(); x.length = 9; x.reverse(); x[2] === undefined. Actual: ' + (x[2]));
+}
+
+if (x[3] !== undefined) {
+  throw new Test262Error('#15: x = []; x[0] = true; x[2] = Infinity; x[4] = undefined; x[5] = undefined; x[8] = "NaN"; x[9] = "-1"; x.reverse(); x.length = 9; x.reverse(); x[3] === undefined. Actual: ' + (x[3]));
+}
+
+if (x[4] !== undefined) {
+  throw new Test262Error('#16: x = []; x[0] = true; x[2] = Infinity; x[4] = undefined; x[5] = undefined; x[8] = "NaN"; x[9] = "-1"; x.reverse(); x.length = 9; x.reverse(); x[4] === undefined. Actual: ' + (x[4]));
+}
+
+if (x[5] !== undefined) {
+  throw new Test262Error('#17: x = []; x[0] = true; x[2] = Infinity; x[4] = undefined; x[5] = undefined; x[8] = "NaN"; x[9] = "-1"; x.reverse(); x.length = 9; x.reverse(); x[5] === undefined. Actual: ' + (x[5]));
+}
+
+if (x[6] !== undefined) {
+  throw new Test262Error('#18: x = []; x[0] = true; x[2] = Infinity; x[4] = undefined; x[5] = undefined; x[8] = "NaN"; x[9] = "-1"; x.reverse(); x.length = 9; x.reverse(); x[6] === undefined. Actual: ' + (x[6]));
+}
+
+if (x[7] !== "NaN") {
+  throw new Test262Error('#19: x = []; x[0] = true; x[2] = Infinity; x[4] = undefined; x[5] = undefined; x[8] = "NaN"; x[9] = "-1"; x.reverse(); x.length = 9; x.reverse(); x[7] === "NaN". Actual: ' + (x[7]));
+}
+
+if (x[8] !== "-1") {
+  throw new Test262Error('#20: x = []; x[0] = true; x[2] = Infinity; x[4] = undefined; x[5] = undefined; x[8] = "NaN"; x[9] = "-1"; x.reverse(); x.length = 9; x.reverse(); x[8] === "-1". Actual: ' + (x[8]));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reverse/S15.4.4.8_A2_T1.js b/js/src/tests/test262/built-ins/Array/prototype/reverse/S15.4.4.8_A2_T1.js
new file mode 100644
index 0000000000..be4e477e02
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reverse/S15.4.4.8_A2_T1.js
@@ -0,0 +1,113 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    The reverse function is intentionally generic.
+    It does not require that its this value be an Array object
+esid: sec-array.prototype.reverse
+description: >
+    Checking this for Object object, elements are objects and
+    primitives, length is integer
+---*/
+
+var obj = {};
+obj.length = 10;
+obj.reverse = Array.prototype.reverse;
+
+obj[0] = true;
+obj[2] = Infinity;
+obj[4] = undefined;
+obj[5] = undefined;
+obj[8] = "NaN";
+obj[9] = "-1";
+
+var reverse = obj.reverse();
+if (reverse !== obj) {
+  throw new Test262Error('#1: var obj = {}; obj.reverse = Array.prototype.reverse; obj.length = 10; obj[0] = true; obj[2] = Infinity; obj[4] = undefined; obj[5] = undefined; obj[8] = "NaN"; obj[9] = "-1"; obj.reverse() === obj. Actual: ' + (reverse));
+}
+
+if (obj[0] !== "-1") {
+  throw new Test262Error('#2: var obj = {}; obj.reverse = Array.prototype.reverse; obj.length = 10; obj[0] = true; obj[2] = Infinity; obj[4] = undefined; obj[5] = undefined; obj[8] = "NaN"; obj[9] = "-1"; obj.reverse(); obj[0] === "-1". Actual: ' + (obj[0]));
+}
+
+if (obj[1] !== "NaN") {
+  throw new Test262Error('#3: var obj = {}; obj.reverse = Array.prototype.reverse; obj.length = 10; obj[0] = true; obj[2] = Infinity; obj[4] = undefined; obj[5] = undefined; obj[8] = "NaN"; obj[9] = "-1"; obj.reverse(); obj[1] === "NaN". Actual: ' + (obj[1]));
+}
+
+if (obj[2] !== undefined) {
+  throw new Test262Error('#4: var obj = {}; obj.reverse = Array.prototype.reverse; obj.length = 10; obj[0] = true; obj[2] = Infinity; obj[4] = undefined; obj[5] = undefined; obj[8] = "NaN"; obj[9] = "-1"; obj.reverse(); obj[2] === undefined. Actual: ' + (obj[2]));
+}
+
+if (obj[3] !== undefined) {
+  throw new Test262Error('#5: var obj = {}; obj.reverse = Array.prototype.reverse; obj.length = 10; obj[0] = true; obj[2] = Infinity; obj[4] = undefined; obj[5] = undefined; obj[8] = "NaN"; obj[9] = "-1"; obj.reverse(); obj[3] === undefined. Actual: ' + (obj[3]));
+}
+
+if (obj[4] !== undefined) {
+  throw new Test262Error('#6: var obj = {}; obj.reverse = Array.prototype.reverse; obj.length = 10; obj[0] = true; obj[2] = Infinity; obj[4] = undefined; obj[5] = undefined; obj[8] = "NaN"; obj[9] = "-1"; obj.reverse(); obj[4] === undefined. Actual: ' + (obj[4]));
+}
+
+if (obj[5] !== undefined) {
+  throw new Test262Error('#7: var obj = {}; obj.reverse = Array.prototype.reverse; obj.length = 10; obj[0] = true; obj[2] = Infinity; obj[4] = undefined; obj[5] = undefined; obj[8] = "NaN"; obj[9] = "-1"; obj.reverse(); obj[5] === undefined. Actual: ' + (obj[5]));
+}
+
+if (obj[6] !== undefined) {
+  throw new Test262Error('#8: var obj = {}; obj.reverse = Array.prototype.reverse; obj.length = 10; obj[0] = true; obj[2] = Infinity; obj[4] = undefined; obj[5] = undefined; obj[8] = "NaN"; obj[9] = "-1"; obj.reverse(); obj[6] === undefined. Actual: ' + (obj[6]));
+}
+
+if (obj[7] !== Infinity) {
+  throw new Test262Error('#9: var obj = {}; obj.reverse = Array.prototype.reverse; obj.length = 10; obj[0] = true; obj[2] = Infinity; obj[4] = undefined; obj[5] = undefined; obj[8] = "NaN"; obj[9] = "-1"; obj.reverse(); obj[7] === Infinity. Actual: ' + (obj[7]));
+}
+
+if (obj[8] !== undefined) {
+  throw new Test262Error('#10: var obj = {}; obj.reverse = Array.prototype.reverse; obj.length = 10; obj[0] = true; obj[2] = Infinity; obj[4] = undefined; obj[5] = undefined; obj[8] = "NaN"; obj[9] = "-1"; obj.reverse(); obj[8] === undefined. Actual: ' + (obj[8]));
+}
+
+if (obj[9] !== true) {
+  throw new Test262Error('#11: var obj = {}; obj.reverse = Array.prototype.reverse; obj.length = 10; obj[0] = true; obj[2] = Infinity; obj[4] = undefined; obj[5] = undefined; obj[8] = "NaN"; obj[9] = "-1"; obj.reverse(); obj[9] === true. Actual: ' + (obj[9]));
+}
+
+obj.length = 9;
+
+var reverse = obj.reverse();
+if (reverse !== obj) {
+  throw new Test262Error('#1: var obj = {}; obj.reverse = Array.prototype.reverse; obj.length = 10; obj[0] = true; obj[2] = Infinity; obj[4] = undefined; obj[5] = undefined; obj[8] = "NaN"; obj[9] = "-1"; obj.reverse(); obj.length = 9; obj.reverse() === obj. Actual: ' + (reverse));
+}
+
+if (obj[0] !== undefined) {
+  throw new Test262Error('#12: var obj = {}; obj.reverse = Array.prototype.reverse; obj.length = 10; obj[0] = true; obj[2] = Infinity; obj[4] = undefined; obj[5] = undefined; obj[8] = "NaN"; obj[9] = "-1"; obj.reverse(); obj.length = 9; obj.reverse(); obj[0] === undefined. Actual: ' + (obj[0]));
+}
+
+if (obj[1] !== Infinity) {
+  throw new Test262Error('#13: var obj = {}; obj.reverse = Array.prototype.reverse; obj.length = 10; obj[0] = true; obj[2] = Infinity; obj[4] = undefined; obj[5] = undefined; obj[8] = "NaN"; obj[9] = "-1"; obj.reverse(); obj.length = 9; obj.reverse(); obj[1] === Infinity. Actual: ' + (obj[1]));
+}
+
+if (obj[2] !== undefined) {
+  throw new Test262Error('#14: var obj = {}; obj.reverse = Array.prototype.reverse; obj.length = 10; obj[0] = true; obj[2] = Infinity; obj[4] = undefined; obj[5] = undefined; obj[8] = "NaN"; obj[9] = "-1"; obj.reverse(); obj.length = 9; obj.reverse(); obj[2] === undefined. Actual: ' + (obj[2]));
+}
+
+if (obj[3] !== undefined) {
+  throw new Test262Error('#15: var obj = {}; obj.reverse = Array.prototype.reverse; obj.length = 10; obj[0] = true; obj[2] = Infinity; obj[4] = undefined; obj[5] = undefined; obj[8] = "NaN"; obj[9] = "-1"; obj.reverse(); obj.length = 9; obj.reverse(); obj[3] === undefined. Actual: ' + (obj[3]));
+}
+
+if (obj[4] !== undefined) {
+  throw new Test262Error('#16: var obj = {}; obj.reverse = Array.prototype.reverse; obj.length = 10; obj[0] = true; obj[2] = Infinity; obj[4] = undefined; obj[5] = undefined; obj[8] = "NaN"; obj[9] = "-1"; obj.reverse(); obj.length = 9; obj.reverse(); obj[4] === undefined. Actual: ' + (obj[4]));
+}
+
+if (obj[5] !== undefined) {
+  throw new Test262Error('#17: var obj = {}; obj.reverse = Array.prototype.reverse; obj.length = 10; obj[0] = true; obj[2] = Infinity; obj[4] = undefined; obj[5] = undefined; obj[8] = "NaN"; obj[9] = "-1"; obj.reverse(); obj.length = 9; obj.reverse(); obj[5] === undefined. Actual: ' + (obj[5]));
+}
+
+if (obj[6] !== undefined) {
+  throw new Test262Error('#18: var obj = {}; obj.reverse = Array.prototype.reverse; obj.length = 10; obj[0] = true; obj[2] = Infinity; obj[4] = undefined; obj[5] = undefined; obj[8] = "NaN"; obj[9] = "-1"; obj.reverse(); obj.length = 9; obj.reverse(); obj[6] === undefined. Actual: ' + (obj[6]));
+}
+
+if (obj[7] !== "NaN") {
+  throw new Test262Error('#19: var obj = {}; obj.reverse = Array.prototype.reverse; obj.length = 10; obj[0] = true; obj[2] = Infinity; obj[4] = undefined; obj[5] = undefined; obj[8] = "NaN"; obj[9] = "-1"; obj.reverse(); obj.length = 9; obj.reverse(); obj[7] === "NaN". Actual: ' + (obj[7]));
+}
+
+if (obj[8] !== "-1") {
+  throw new Test262Error('#20: var obj = {}; obj.reverse = Array.prototype.reverse; obj.length = 10; obj[0] = true; obj[2] = Infinity; obj[4] = undefined; obj[5] = undefined; obj[8] = "NaN"; obj[9] = "-1"; obj.reverse(); obj.length = 9; obj.reverse(); obj[8] === "-1". Actual: ' + (obj[8]));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reverse/S15.4.4.8_A2_T2.js b/js/src/tests/test262/built-ins/Array/prototype/reverse/S15.4.4.8_A2_T2.js
new file mode 100644
index 0000000000..0b61f0aeed
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reverse/S15.4.4.8_A2_T2.js
@@ -0,0 +1,113 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    The reverse function is intentionally generic.
+    It does not require that its this value be an Array object
+esid: sec-array.prototype.reverse
+description: >
+    Checking this for Object object, elements are objects and
+    primitives, length is not integer
+---*/
+
+var obj = {};
+obj.length = 10.5;
+obj.reverse = Array.prototype.reverse;
+
+obj[0] = true;
+obj[2] = Infinity;
+obj[4] = undefined;
+obj[5] = undefined;
+obj[8] = "NaN";
+obj[9] = "-1";
+
+var reverse = obj.reverse();
+if (reverse !== obj) {
+  throw new Test262Error('#1: var obj = {}; obj.reverse = Array.prototype.reverse; obj.length = 10.5; obj[0] = true; obj[2] = Infinity; obj[4] = undefined; obj[5] = undefined; obj[8] = "NaN"; obj[9] = "-1"; obj.reverse() === obj. Actual: ' + (reverse));
+}
+
+if (obj[0] !== "-1") {
+  throw new Test262Error('#2: var obj = {}; obj.reverse = Array.prototype.reverse; obj.length = 10.5; obj[0] = true; obj[2] = Infinity; obj[4] = undefined; obj[5] = undefined; obj[8] = "NaN"; obj[9] = "-1"; obj.reverse(); obj[0] === "-1". Actual: ' + (obj[0]));
+}
+
+if (obj[1] !== "NaN") {
+  throw new Test262Error('#3: var obj = {}; obj.reverse = Array.prototype.reverse; obj.length = 10.5; obj[0] = true; obj[2] = Infinity; obj[4] = undefined; obj[5] = undefined; obj[8] = "NaN"; obj[9] = "-1"; obj.reverse(); obj[1] === "NaN". Actual: ' + (obj[1]));
+}
+
+if (obj[2] !== undefined) {
+  throw new Test262Error('#4: var obj = {}; obj.reverse = Array.prototype.reverse; obj.length = 10.5; obj[0] = true; obj[2] = Infinity; obj[4] = undefined; obj[5] = undefined; obj[8] = "NaN"; obj[9] = "-1"; obj.reverse(); obj[2] === undefined. Actual: ' + (obj[2]));
+}
+
+if (obj[3] !== undefined) {
+  throw new Test262Error('#5: var obj = {}; obj.reverse = Array.prototype.reverse; obj.length = 10.5; obj[0] = true; obj[2] = Infinity; obj[4] = undefined; obj[5] = undefined; obj[8] = "NaN"; obj[9] = "-1"; obj.reverse(); obj[3] === undefined. Actual: ' + (obj[3]));
+}
+
+if (obj[4] !== undefined) {
+  throw new Test262Error('#6: var obj = {}; obj.reverse = Array.prototype.reverse; obj.length = 10.5; obj[0] = true; obj[2] = Infinity; obj[4] = undefined; obj[5] = undefined; obj[8] = "NaN"; obj[9] = "-1"; obj.reverse(); obj[4] === undefined. Actual: ' + (obj[4]));
+}
+
+if (obj[5] !== undefined) {
+  throw new Test262Error('#7: var obj = {}; obj.reverse = Array.prototype.reverse; obj.length = 10.5; obj[0] = true; obj[2] = Infinity; obj[4] = undefined; obj[5] = undefined; obj[8] = "NaN"; obj[9] = "-1"; obj.reverse(); obj[5] === undefined. Actual: ' + (obj[5]));
+}
+
+if (obj[6] !== undefined) {
+  throw new Test262Error('#8: var obj = {}; obj.reverse = Array.prototype.reverse; obj.length = 10.5; obj[0] = true; obj[2] = Infinity; obj[4] = undefined; obj[5] = undefined; obj[8] = "NaN"; obj[9] = "-1"; obj.reverse(); obj[6] === undefined. Actual: ' + (obj[6]));
+}
+
+if (obj[7] !== Infinity) {
+  throw new Test262Error('#9: var obj = {}; obj.reverse = Array.prototype.reverse; obj.length = 10.5; obj[0] = true; obj[2] = Infinity; obj[4] = undefined; obj[5] = undefined; obj[8] = "NaN"; obj[9] = "-1"; obj.reverse(); obj[7] === Infinity. Actual: ' + (obj[7]));
+}
+
+if (obj[8] !== undefined) {
+  throw new Test262Error('#10: var obj = {}; obj.reverse = Array.prototype.reverse; obj.length = 10.5; obj[0] = true; obj[2] = Infinity; obj[4] = undefined; obj[5] = undefined; obj[8] = "NaN"; obj[9] = "-1"; obj.reverse(); obj[8] === undefined. Actual: ' + (obj[8]));
+}
+
+if (obj[9] !== true) {
+  throw new Test262Error('#11: var obj = {}; obj.reverse = Array.prototype.reverse; obj.length = 10.5; obj[0] = true; obj[2] = Infinity; obj[4] = undefined; obj[5] = undefined; obj[8] = "NaN"; obj[9] = "-1"; obj.reverse(); obj[9] === true. Actual: ' + (obj[9]));
+}
+
+obj.length = new Number(9.5);
+
+var reverse = obj.reverse();
+if (reverse !== obj) {
+  throw new Test262Error('#1: var obj = {}; obj.reverse = Array.prototype.reverse; obj.length = 10.5; obj[0] = true; obj[2] = Infinity; obj[4] = undefined; obj[5] = undefined; obj[8] = "NaN"; obj[9] = "-1"; obj.reverse(); obj.length = new Number(9.5); obj.reverse() === obj. Actual: ' + (reverse));
+}
+
+if (obj[0] !== undefined) {
+  throw new Test262Error('#12: var obj = {}; obj.reverse = Array.prototype.reverse; obj.length = 10.5; obj[0] = true; obj[2] = Infinity; obj[4] = undefined; obj[5] = undefined; obj[8] = "NaN"; obj[9] = "-1"; obj.reverse(); obj.length = new Number(9.5); obj.reverse(); obj[0] === undefined. Actual: ' + (obj[0]));
+}
+
+if (obj[1] !== Infinity) {
+  throw new Test262Error('#13: var obj = {}; obj.reverse = Array.prototype.reverse; obj.length = 10.5; obj[0] = true; obj[2] = Infinity; obj[4] = undefined; obj[5] = undefined; obj[8] = "NaN"; obj[9] = "-1"; obj.reverse(); obj.length = new Number(9.5); obj.reverse(); obj[1] === Infinity. Actual: ' + (obj[1]));
+}
+
+if (obj[2] !== undefined) {
+  throw new Test262Error('#14: var obj = {}; obj.reverse = Array.prototype.reverse; obj.length = 10.5; obj[0] = true; obj[2] = Infinity; obj[4] = undefined; obj[5] = undefined; obj[8] = "NaN"; obj[9] = "-1"; obj.reverse(); obj.length = new Number(9.5); obj.reverse(); obj[2] === undefined. Actual: ' + (obj[2]));
+}
+
+if (obj[3] !== undefined) {
+  throw new Test262Error('#15: var obj = {}; obj.reverse = Array.prototype.reverse; obj.length = 10.5; obj[0] = true; obj[2] = Infinity; obj[4] = undefined; obj[5] = undefined; obj[8] = "NaN"; obj[9] = "-1"; obj.reverse(); obj.length = new Number(9.5); obj.reverse(); obj[3] === undefined. Actual: ' + (obj[3]));
+}
+
+if (obj[4] !== undefined) {
+  throw new Test262Error('#16: var obj = {}; obj.reverse = Array.prototype.reverse; obj.length = 10.5; obj[0] = true; obj[2] = Infinity; obj[4] = undefined; obj[5] = undefined; obj[8] = "NaN"; obj[9] = "-1"; obj.reverse(); obj.length = new Number(9.5); obj.reverse(); obj[4] === undefined. Actual: ' + (obj[4]));
+}
+
+if (obj[5] !== undefined) {
+  throw new Test262Error('#17: var obj = {}; obj.reverse = Array.prototype.reverse; obj.length = 10.5; obj[0] = true; obj[2] = Infinity; obj[4] = undefined; obj[5] = undefined; obj[8] = "NaN"; obj[9] = "-1"; obj.reverse(); obj.length = new Number(9.5); obj.reverse(); obj[5] === undefined. Actual: ' + (obj[5]));
+}
+
+if (obj[6] !== undefined) {
+  throw new Test262Error('#18: var obj = {}; obj.reverse = Array.prototype.reverse; obj.length = 10.5; obj[0] = true; obj[2] = Infinity; obj[4] = undefined; obj[5] = undefined; obj[8] = "NaN"; obj[9] = "-1"; obj.reverse(); obj.length = new Number(9.5); obj.reverse(); obj[6] === undefined. Actual: ' + (obj[6]));
+}
+
+if (obj[7] !== "NaN") {
+  throw new Test262Error('#19: var obj = {}; obj.reverse = Array.prototype.reverse; obj.length = 10.5; obj[0] = true; obj[2] = Infinity; obj[4] = undefined; obj[5] = undefined; obj[8] = "NaN"; obj[9] = "-1"; obj.reverse(); obj.length = new Number(9.5); obj.reverse(); obj[7] === "NaN". Actual: ' + (obj[7]));
+}
+
+if (obj[8] !== "-1") {
+  throw new Test262Error('#20: var obj = {}; obj.reverse = Array.prototype.reverse; obj.length = 10.5; obj[0] = true; obj[2] = Infinity; obj[4] = undefined; obj[5] = undefined; obj[8] = "NaN"; obj[9] = "-1"; obj.reverse(); obj.length = new Number(9.5); obj.reverse(); obj[8] === "-1". Actual: ' + (obj[8]));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reverse/S15.4.4.8_A2_T3.js b/js/src/tests/test262/built-ins/Array/prototype/reverse/S15.4.4.8_A2_T3.js
new file mode 100644
index 0000000000..0afd7860c5
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reverse/S15.4.4.8_A2_T3.js
@@ -0,0 +1,113 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    The reverse function is intentionally generic.
+    It does not require that its this value be an Array object
+esid: sec-array.prototype.reverse
+description: >
+    Checking this for Object object, elements are objects and
+    primitives, length is string
+---*/
+
+var obj = {};
+obj.length = "10";
+obj.reverse = Array.prototype.reverse;
+
+obj[0] = true;
+obj[2] = Infinity;
+obj[4] = undefined;
+obj[5] = undefined;
+obj[8] = "NaN";
+obj[9] = "-1";
+
+var reverse = obj.reverse();
+if (reverse !== obj) {
+  throw new Test262Error('#1: var obj = {}; obj.reverse = Array.prototype.reverse; obj.length = "10"; obj[0] = true; obj[2] = Infinity; obj[4] = undefined; obj[5] = undefined; obj[8] = "NaN"; obj[9] = "-1"; obj.reverse() === obj. Actual: ' + (reverse));
+}
+
+if (obj[0] !== "-1") {
+  throw new Test262Error('#2: var obj = {}; obj.reverse = Array.prototype.reverse; obj.length = "10"; obj[0] = true; obj[2] = Infinity; obj[4] = undefined; obj[5] = undefined; obj[8] = "NaN"; obj[9] = "-1"; obj.reverse(); obj[0] === "-1". Actual: ' + (obj[0]));
+}
+
+if (obj[1] !== "NaN") {
+  throw new Test262Error('#3: var obj = {}; obj.reverse = Array.prototype.reverse; obj.length = "10"; obj[0] = true; obj[2] = Infinity; obj[4] = undefined; obj[5] = undefined; obj[8] = "NaN"; obj[9] = "-1"; obj.reverse(); obj[1] === "NaN". Actual: ' + (obj[1]));
+}
+
+if (obj[2] !== undefined) {
+  throw new Test262Error('#4: var obj = {}; obj.reverse = Array.prototype.reverse; obj.length = "10"; obj[0] = true; obj[2] = Infinity; obj[4] = undefined; obj[5] = undefined; obj[8] = "NaN"; obj[9] = "-1"; obj.reverse(); obj[2] === undefined. Actual: ' + (obj[2]));
+}
+
+if (obj[3] !== undefined) {
+  throw new Test262Error('#5: var obj = {}; obj.reverse = Array.prototype.reverse; obj.length = "10"; obj[0] = true; obj[2] = Infinity; obj[4] = undefined; obj[5] = undefined; obj[8] = "NaN"; obj[9] = "-1"; obj.reverse(); obj[3] === undefined. Actual: ' + (obj[3]));
+}
+
+if (obj[4] !== undefined) {
+  throw new Test262Error('#6: var obj = {}; obj.reverse = Array.prototype.reverse; obj.length = "10"; obj[0] = true; obj[2] = Infinity; obj[4] = undefined; obj[5] = undefined; obj[8] = "NaN"; obj[9] = "-1"; obj.reverse(); obj[4] === undefined. Actual: ' + (obj[4]));
+}
+
+if (obj[5] !== undefined) {
+  throw new Test262Error('#7: var obj = {}; obj.reverse = Array.prototype.reverse; obj.length = "10"; obj[0] = true; obj[2] = Infinity; obj[4] = undefined; obj[5] = undefined; obj[8] = "NaN"; obj[9] = "-1"; obj.reverse(); obj[5] === undefined. Actual: ' + (obj[5]));
+}
+
+if (obj[6] !== undefined) {
+  throw new Test262Error('#8: var obj = {}; obj.reverse = Array.prototype.reverse; obj.length = "10"; obj[0] = true; obj[2] = Infinity; obj[4] = undefined; obj[5] = undefined; obj[8] = "NaN"; obj[9] = "-1"; obj.reverse(); obj[6] === undefined. Actual: ' + (obj[6]));
+}
+
+if (obj[7] !== Infinity) {
+  throw new Test262Error('#9: var obj = {}; obj.reverse = Array.prototype.reverse; obj.length = "10"; obj[0] = true; obj[2] = Infinity; obj[4] = undefined; obj[5] = undefined; obj[8] = "NaN"; obj[9] = "-1"; obj.reverse(); obj[7] === Infinity. Actual: ' + (obj[7]));
+}
+
+if (obj[8] !== undefined) {
+  throw new Test262Error('#10: var obj = {}; obj.reverse = Array.prototype.reverse; obj.length = "10"; obj[0] = true; obj[2] = Infinity; obj[4] = undefined; obj[5] = undefined; obj[8] = "NaN"; obj[9] = "-1"; obj.reverse(); obj[8] === undefined. Actual: ' + (obj[8]));
+}
+
+if (obj[9] !== true) {
+  throw new Test262Error('#11: var obj = {}; obj.reverse = Array.prototype.reverse; obj.length = "10"; obj[0] = true; obj[2] = Infinity; obj[4] = undefined; obj[5] = undefined; obj[8] = "NaN"; obj[9] = "-1"; obj.reverse(); obj[9] === true. Actual: ' + (obj[9]));
+}
+
+obj.length = new String("9");
+
+var reverse = obj.reverse();
+if (reverse !== obj) {
+  throw new Test262Error('#1: var obj = {}; obj.reverse = Array.prototype.reverse; obj.length = "10"; obj[0] = true; obj[2] = Infinity; obj[4] = undefined; obj[5] = undefined; obj[8] = "NaN"; obj[9] = "-1"; obj.reverse(); obj.length = new String("9"); obj.reverse() === obj. Actual: ' + (reverse));
+}
+
+if (obj[0] !== undefined) {
+  throw new Test262Error('#12: var obj = {}; obj.reverse = Array.prototype.reverse; obj.length = "10"; obj[0] = true; obj[2] = Infinity; obj[4] = undefined; obj[5] = undefined; obj[8] = "NaN"; obj[9] = "-1"; obj.reverse(); obj.length = new String("9"); obj.reverse(); obj[0] === undefined. Actual: ' + (obj[0]));
+}
+
+if (obj[1] !== Infinity) {
+  throw new Test262Error('#13: var obj = {}; obj.reverse = Array.prototype.reverse; obj.length = "10"; obj[0] = true; obj[2] = Infinity; obj[4] = undefined; obj[5] = undefined; obj[8] = "NaN"; obj[9] = "-1"; obj.reverse(); obj.length = new String("9"); obj.reverse(); obj[1] === Infinity. Actual: ' + (obj[1]));
+}
+
+if (obj[2] !== undefined) {
+  throw new Test262Error('#14: var obj = {}; obj.reverse = Array.prototype.reverse; obj.length = "10"; obj[0] = true; obj[2] = Infinity; obj[4] = undefined; obj[5] = undefined; obj[8] = "NaN"; obj[9] = "-1"; obj.reverse(); obj.length = new String("9"); obj.reverse(); obj[2] === undefined. Actual: ' + (obj[2]));
+}
+
+if (obj[3] !== undefined) {
+  throw new Test262Error('#15: var obj = {}; obj.reverse = Array.prototype.reverse; obj.length = "10"; obj[0] = true; obj[2] = Infinity; obj[4] = undefined; obj[5] = undefined; obj[8] = "NaN"; obj[9] = "-1"; obj.reverse(); obj.length = new String("9"); obj.reverse(); obj[3] === undefined. Actual: ' + (obj[3]));
+}
+
+if (obj[4] !== undefined) {
+  throw new Test262Error('#16: var obj = {}; obj.reverse = Array.prototype.reverse; obj.length = "10"; obj[0] = true; obj[2] = Infinity; obj[4] = undefined; obj[5] = undefined; obj[8] = "NaN"; obj[9] = "-1"; obj.reverse(); obj.length = new String("9"); obj.reverse(); obj[4] === undefined. Actual: ' + (obj[4]));
+}
+
+if (obj[5] !== undefined) {
+  throw new Test262Error('#17: var obj = {}; obj.reverse = Array.prototype.reverse; obj.length = "10"; obj[0] = true; obj[2] = Infinity; obj[4] = undefined; obj[5] = undefined; obj[8] = "NaN"; obj[9] = "-1"; obj.reverse(); obj.length = new String("9"); obj.reverse(); obj[5] === undefined. Actual: ' + (obj[5]));
+}
+
+if (obj[6] !== undefined) {
+  throw new Test262Error('#18: var obj = {}; obj.reverse = Array.prototype.reverse; obj.length = "10"; obj[0] = true; obj[2] = Infinity; obj[4] = undefined; obj[5] = undefined; obj[8] = "NaN"; obj[9] = "-1"; obj.reverse(); obj.length = new String("9"); obj.reverse(); obj[6] === undefined. Actual: ' + (obj[6]));
+}
+
+if (obj[7] !== "NaN") {
+  throw new Test262Error('#19: var obj = {}; obj.reverse = Array.prototype.reverse; obj.length = "10"; obj[0] = true; obj[2] = Infinity; obj[4] = undefined; obj[5] = undefined; obj[8] = "NaN"; obj[9] = "-1"; obj.reverse(); obj.length = new String("9"); obj.reverse(); obj[7] === "NaN". Actual: ' + (obj[7]));
+}
+
+if (obj[8] !== "-1") {
+  throw new Test262Error('#20: var obj = {}; obj.reverse = Array.prototype.reverse; obj.length = "10"; obj[0] = true; obj[2] = Infinity; obj[4] = undefined; obj[5] = undefined; obj[8] = "NaN"; obj[9] = "-1"; obj.reverse(); obj.length = new String("9"); obj.reverse(); obj[8] === "-1". Actual: ' + (obj[8]));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reverse/S15.4.4.8_A3_T3.js b/js/src/tests/test262/built-ins/Array/prototype/reverse/S15.4.4.8_A3_T3.js
new file mode 100644
index 0000000000..6f757b571b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reverse/S15.4.4.8_A3_T3.js
@@ -0,0 +1,38 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: Check ToLength(length) for non Array objects
+esid: sec-array.prototype.reverse
+description: length = -4294967294
+---*/
+
+var obj = {};
+obj.reverse = Array.prototype.reverse;
+obj[0] = "x";
+obj[1] = "y";
+obj[2] = "z";
+obj.length = -4294967294;
+
+var reverse = obj.reverse();
+if (reverse !== obj) {
+  throw new Test262Error('#1: var obj = {}; obj.reverse = Array.prototype.reverse; obj[0] = "x"; obj[1] = "y"; obj[2] = "z"; obj.length = -4294967294; obj.reverse() === obj. Actual: ' + (reverse));
+}
+
+if (obj.length !== -4294967294) {
+  throw new Test262Error('#2: var obj = {}; obj.reverse = Array.prototype.reverse; obj[0] = "x"; obj[1] = "y"; obj[2] = "z"; obj.length = -4294967294; obj.reverse(); obj.length === -4294967294. Actual: ' + (obj.length));
+}
+
+if (obj[0] !== "x") {
+  throw new Test262Error('#3: var obj = {}; obj.reverse = Array.prototype.reverse; obj[0] = "x"; obj[1] = "y"; obj[2] = "z"; obj.length = -4294967294; obj.reverse(); obj[0] === "x". Actual: ' + (obj[0]));
+}
+
+if (obj[1] !== "y") {
+  throw new Test262Error('#4: var obj = {}; obj.reverse = Array.prototype.reverse; obj[0] = "x"; obj[1] = "y"; obj[2] = "z"; obj.length = -4294967294; obj.reverse(); obj[1] === "y". Actual: ' + (obj[1]));
+}
+
+if (obj[2] !== "z") {
+  throw new Test262Error('#5: var obj = {}; obj.reverse = Array.prototype.reverse; obj[0] = "x"; obj[1] = "y"; obj[2] = "z"; obj.length = -4294967294; obj.reverse(); obj[2] === "z". Actual: ' + (obj[2]));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reverse/S15.4.4.8_A4_T1.js b/js/src/tests/test262/built-ins/Array/prototype/reverse/S15.4.4.8_A4_T1.js
new file mode 100644
index 0000000000..21f59fcf52
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reverse/S15.4.4.8_A4_T1.js
@@ -0,0 +1,62 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: "[[Get]], [[Delete]] from not an inherited property"
+esid: sec-array.prototype.reverse
+description: >
+    [[Prototype]] of Array instance is Array.prototype, [[Prototype]
+    of Array.prototype is Object.prototype
+---*/
+
+Array.prototype[1] = 1;
+var x = [0];
+x.length = 2;
+x.reverse();
+
+if (x[0] !== 1) {
+  throw new Test262Error('#1: Array.prototype[1] = 1; x = [0]; x.length = 2; x.reverse(); x[0] === 1. Actual: ' + (x[0]));
+}
+
+if (x[1] !== 0) {
+  throw new Test262Error('#2: Array.prototype[1] = 1; x = [0]; x.length = 2; x.reverse(); x[1] === 0. Actual: ' + (x[1]));
+}
+
+x.length = 0;
+
+if (x[0] !== undefined) {
+  throw new Test262Error('#3: Array.prototype[1] = 1; x = [0]; x.length = 2; x.reverse(); x.length = 0; x[0] === undefined. Actual: ' + (x[0]));
+}
+
+if (x[1] !== 1) {
+  throw new Test262Error('#4: Array.prototype[1] = 1; x = [0]; x.length = 2; x.reverse(); x.length = 0; x[1] === 1. Actual: ' + (x[1]));
+}
+
+Object.prototype[1] = 1;
+Object.prototype.length = 2;
+Object.prototype.reverse = Array.prototype.reverse;
+x = {
+  0: 0
+};
+x.reverse();
+
+if (x[0] !== 1) {
+  throw new Test262Error('#5: Object.prototype[1] = 1; Object.prototype.length = 2; Object.prototype.reverse = Array.prototype.reverse; x = {0:0}; x.reverse(); x[0] === 0. Actual: ' + (x[0]));
+}
+
+if (x[1] !== 0) {
+  throw new Test262Error('#6: Object.prototype[1] = 1; Object.prototype.length = 2; Object.prototype.reverse = Array.prototype.reverse; x = {0:0}; x.reverse(); x[1] === 0. Actual: ' + (x[1]));
+}
+
+delete x[0];
+delete x[1];
+
+if (x[0] !== undefined) {
+  throw new Test262Error('#7: Object.prototype[1] = 1; Object.prototype.length = 2; Object.prototype.reverse = Array.prototype.reverse; x = {0:0}; x.reverse(); delete x[0]; delete x[1]; x[0] === undefined. Actual: ' + (x[0]));
+}
+
+if (x[1] !== 1) {
+  throw new Test262Error('#8: Object.prototype[1] = 1; Object.prototype.length = 2; Object.prototype.reverse = Array.prototype.reverse; x = {0:0}; x.reverse(); delete x[0]; delete x[1]; x[1] === 1. Actual: ' + (x[1]));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reverse/S15.4.4.8_A4_T2.js b/js/src/tests/test262/built-ins/Array/prototype/reverse/S15.4.4.8_A4_T2.js
new file mode 100644
index 0000000000..f71c23a262
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reverse/S15.4.4.8_A4_T2.js
@@ -0,0 +1,63 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: "[[Get]], [[Delete]] from not an inherited property"
+esid: sec-array.prototype.reverse
+description: >
+    [[Prototype]] of Array instance is Array.prototype, [[Prototype]
+    of Array.prototype is Object.prototype
+---*/
+
+Array.prototype[1] = -1;
+var x = [0, 1];
+x.length = 2;
+x.reverse();
+
+if (x[0] !== 1) {
+  throw new Test262Error('#1: Array.prototype[1] = -1; x = [0,1]; x.length = 2; x.reverse(); x[0] === 1. Actual: ' + (x[0]));
+}
+
+if (x[1] !== 0) {
+  throw new Test262Error('#2: Array.prototype[1] = -1; x = [0,1]; x.length = 2; x.reverse(); x[1] === 0. Actual: ' + (x[1]));
+}
+
+x.length = 0;
+
+if (x[0] !== undefined) {
+  throw new Test262Error('#3: Array.prototype[1] = -1; x = [0,1]; x.length = 2; x.reverse(); x.length = 0; x[0] === undefined. Actual: ' + (x[0]));
+}
+
+if (x[1] !== -1) {
+  throw new Test262Error('#4: Array.prototype[1] = -1; x = [0,1]; x.length = 2; x.reverse(); x.length = 0; x[1] === -1. Actual: ' + (x[1]));
+}
+
+Object.prototype[1] = -1;
+Object.prototype.length = 2;
+Object.prototype.reverse = Array.prototype.reverse;
+x = {
+  0: 0,
+  1: 1
+};
+x.reverse();
+
+if (x[0] !== 1) {
+  throw new Test262Error('#5: Object.prototype[1] = -1; Object.prototype.length = 2; Object.prototype.reverse = Array.prototype.reverse; x = {0:0,1:1}; x.reverse(); x[0] === 0. Actual: ' + (x[0]));
+}
+
+if (x[1] !== 0) {
+  throw new Test262Error('#6: Object.prototype[1] = -1; Object.prototype.length = 2; Object.prototype.reverse = Array.prototype.reverse; x = {0:0,1:1}; x.reverse(); x[1] === 0. Actual: ' + (x[1]));
+}
+
+delete x[0];
+delete x[1];
+
+if (x[0] !== undefined) {
+  throw new Test262Error('#7: Object.prototype[1] = -1; Object.prototype.length = 2; Object.prototype.reverse = Array.prototype.reverse; x = {0:0,1:1}; x.reverse(); delete x[0]; delete x[1]; x[0] === undefined. Actual: ' + (x[0]));
+}
+
+if (x[1] !== -1) {
+  throw new Test262Error('#8: Object.prototype[1] = -1; Object.prototype.length = 2; Object.prototype.reverse = Array.prototype.reverse; x = {0:0,1:1}; x.reverse(); delete x[0]; delete x[1]; x[1] === -1. Actual: ' + (x[1]));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reverse/array-has-one-entry.js b/js/src/tests/test262/built-ins/Array/prototype/reverse/array-has-one-entry.js
new file mode 100644
index 0000000000..630ae1eb3f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reverse/array-has-one-entry.js
@@ -0,0 +1,25 @@
+// Copyright (c) 2020 Rick Waldron.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reverse
+description: Array.prototype.reverse should not iterate items if there is only one entry
+info: |
+  Array.prototype.reverse ( )
+
+  Let O be ? ToObject(this value).
+  Let len be ? LengthOfArrayLike(O).
+  Let middle be floor(len / 2).
+  Let lower be 0.
+  Repeat, while lower ≠ middle,
+    ...
+  Return O.
+---*/
+
+let a = [1];
+
+Object.freeze(a);
+
+a.reverse();
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reverse/browser.js b/js/src/tests/test262/built-ins/Array/prototype/reverse/browser.js
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reverse/call-with-boolean.js b/js/src/tests/test262/built-ins/Array/prototype/reverse/call-with-boolean.js
new file mode 100644
index 0000000000..0993ce09f4
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reverse/call-with-boolean.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2020 Rick Waldron.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reverse
+description: Array.prototype.reverse applied to boolean primitive
+---*/
+
+assert.sameValue(
+  Array.prototype.reverse.call(true) instanceof Boolean,
+  true,
+  'The result of `(Array.prototype.reverse.call(true) instanceof Boolean)` is true'
+);
+assert.sameValue(
+  Array.prototype.reverse.call(false) instanceof Boolean,
+  true,
+  'The result of `(Array.prototype.reverse.call(false) instanceof Boolean)` is true'
+);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reverse/get_if_present_with_delete.js b/js/src/tests/test262/built-ins/Array/prototype/reverse/get_if_present_with_delete.js
new file mode 100644
index 0000000000..cf80988cf2
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reverse/get_if_present_with_delete.js
@@ -0,0 +1,39 @@
+// Copyright (C) 2015 André Bargull. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+description: Array.prototype.reverse only gets present properties - delete property with getter
+info: |
+  22.1.3.20 Array.prototype.reverse ( )
+
+  ...
+  7.
+    d. Let lowerExists be HasProperty(O, lowerP).
+    e. ReturnIfAbrupt(lowerExists).
+    f. If lowerExists is true, then
+      i.  Let lowerValue be Get(O, lowerP).
+      ii. ReturnIfAbrupt(lowerValue).
+    g. Let upperExists be HasProperty(O, upperP).
+    h. ReturnIfAbrupt(upperExists).
+    i. If upperExists is true, then
+      i.  Let upperValue be Get(O, upperP).
+      ii. ReturnIfAbrupt(upperValue).
+esid: sec-array.prototype.reverse
+---*/
+
+var array = ["first", "second"];
+
+Object.defineProperty(array, 0, {
+  get: function() {
+    array.length = 0;
+    return "first";
+  }
+});
+
+array.reverse();
+
+assert.sameValue((0 in array), false, "Indexed property '0' not present");
+assert.sameValue((1 in array), true, "Indexed property '1' present");
+assert.sameValue(array[1], "first", "Indexed property '1' value correct");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reverse/length-exceeding-integer-limit-with-object.js b/js/src/tests/test262/built-ins/Array/prototype/reverse/length-exceeding-integer-limit-with-object.js
new file mode 100644
index 0000000000..056478532c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reverse/length-exceeding-integer-limit-with-object.js
@@ -0,0 +1,35 @@
+// Copyright (C) 2017 André Bargull. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reverse
+description: >
+  Ensure reverse() implementation correctly handles length exceeding 2^53-1 with plain objects.
+info: |
+  ...
+  2. Let len be ? ToLength(? Get(O, "length")).
+  ...
+features: [exponentiation]
+---*/
+
+function StopReverse() {}
+
+// Object with large "length" property and no indexed properties in the uint32 range.
+var arrayLike = {
+  get "9007199254740990" () {
+    throw new StopReverse();
+  },
+  get "9007199254740991" () {
+    throw new Test262Error("Get 9007199254740991");
+  },
+  get "9007199254740992" () {
+    throw new Test262Error("Get 9007199254740992");
+  },
+  length: 2 ** 53 + 2,
+};
+
+assert.throws(StopReverse, function() {
+  Array.prototype.reverse.call(arrayLike);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reverse/length-exceeding-integer-limit-with-proxy.js b/js/src/tests/test262/built-ins/Array/prototype/reverse/length-exceeding-integer-limit-with-proxy.js
new file mode 100644
index 0000000000..57fba3cd11
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reverse/length-exceeding-integer-limit-with-proxy.js
@@ -0,0 +1,122 @@
+// Copyright (C) 2017 André Bargull. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reverse
+description: >
+  Ensure correct MOP operations are called when length exceeds 2^53-1.
+includes: [compareArray.js, proxyTrapsHelper.js]
+features: [exponentiation]
+---*/
+
+function StopReverse() {}
+
+var arrayLike = {
+  0: "zero",
+  /* 1: hole, */
+  2: "two",
+  /* 3: hole, */
+
+  get 4() {
+    throw new StopReverse();
+  },
+
+  9007199254740987: "2**53-5",
+  /* 9007199254740988: hole, */
+  /* 9007199254740989: hole, */
+  9007199254740990: "2**53-2",
+
+  length: 2 ** 53 + 2,
+};
+
+var traps = [];
+
+var proxy = new Proxy(arrayLike, allowProxyTraps({
+  getOwnPropertyDescriptor(t, pk) {
+    traps.push(`GetOwnPropertyDescriptor:${String(pk)}`);
+    return Reflect.getOwnPropertyDescriptor(t, pk);
+  },
+  defineProperty(t, pk, desc) {
+    traps.push(`DefineProperty:${String(pk)}`);
+    return Reflect.defineProperty(t, pk, desc);
+  },
+  has(t, pk) {
+    traps.push(`Has:${String(pk)}`);
+    return Reflect.has(t, pk);
+  },
+  get(t, pk, r) {
+    traps.push(`Get:${String(pk)}`);
+    return Reflect.get(t, pk, r);
+  },
+  set(t, pk, v, r) {
+    traps.push(`Set:${String(pk)}`);
+    return Reflect.set(t, pk, v, r);
+  },
+  deleteProperty(t, pk) {
+    traps.push(`Delete:${String(pk)}`);
+    return Reflect.deleteProperty(t, pk);
+  },
+}))
+
+// Uses a separate exception than Test262Error, so that errors from allowProxyTraps
+// are properly propagated.
+assert.throws(StopReverse, function() {
+  Array.prototype.reverse.call(proxy);
+}, 'Array.prototype.reverse.call(proxy) throws a StopReverse exception');
+
+assert.compareArray(traps, [
+  // Initial get length operation.
+  "Get:length",
+
+  // Lower and upper index are both present.
+  "Has:0",
+  "Get:0",
+  "Has:9007199254740990",
+  "Get:9007199254740990",
+  "Set:0",
+  "GetOwnPropertyDescriptor:0",
+  "DefineProperty:0",
+  "Set:9007199254740990",
+  "GetOwnPropertyDescriptor:9007199254740990",
+  "DefineProperty:9007199254740990",
+
+  // Lower and upper index are both absent.
+  "Has:1",
+  "Has:9007199254740989",
+
+  // Lower index is present, upper index is absent.
+  "Has:2",
+  "Get:2",
+  "Has:9007199254740988",
+  "Delete:2",
+  "Set:9007199254740988",
+  "GetOwnPropertyDescriptor:9007199254740988",
+  "DefineProperty:9007199254740988",
+
+  // Lower index is absent, upper index is present.
+  "Has:3",
+  "Has:9007199254740987",
+  "Get:9007199254740987",
+  "Set:3",
+  "GetOwnPropertyDescriptor:3",
+  "DefineProperty:3",
+  "Delete:9007199254740987",
+
+  // Stop exception.
+  "Has:4",
+  "Get:4",
+], 'The value of traps is expected to be [\n  // Initial get length operation.\n  "Get:length",\n\n  // Lower and upper index are both present.\n  "Has:0",\n  "Get:0",\n  "Has:9007199254740990",\n  "Get:9007199254740990",\n  "Set:0",\n  "GetOwnPropertyDescriptor:0",\n  "DefineProperty:0",\n  "Set:9007199254740990",\n  "GetOwnPropertyDescriptor:9007199254740990",\n  "DefineProperty:9007199254740990",\n\n  // Lower and upper index are both absent.\n  "Has:1",\n  "Has:9007199254740989",\n\n  // Lower index is present, upper index is absent.\n  "Has:2",\n  "Get:2",\n  "Has:9007199254740988",\n  "Delete:2",\n  "Set:9007199254740988",\n  "GetOwnPropertyDescriptor:9007199254740988",\n  "DefineProperty:9007199254740988",\n\n  // Lower index is absent, upper index is present.\n  "Has:3",\n  "Has:9007199254740987",\n  "Get:9007199254740987",\n  "Set:3",\n  "GetOwnPropertyDescriptor:3",\n  "DefineProperty:3",\n  "Delete:9007199254740987",\n\n  // Stop exception.\n  "Has:4",\n  "Get:4",\n]');
+
+assert.sameValue(arrayLike.length, 2 ** 53 + 2, 'The value of arrayLike.length is expected to be 2 ** 53 + 2');
+
+assert.sameValue(arrayLike[0], "2**53-2", 'The value of arrayLike[0] is expected to be "2**53-2"');
+assert.sameValue(1 in arrayLike, false, 'The result of evaluating (1 in arrayLike) is expected to be false');
+assert.sameValue(2 in arrayLike, false, 'The result of evaluating (2 in arrayLike) is expected to be false');
+assert.sameValue(arrayLike[3], "2**53-5", 'The value of arrayLike[3] is expected to be "2**53-5"');
+
+assert.sameValue(9007199254740987 in arrayLike, false, 'The result of evaluating (9007199254740987 in arrayLike) is expected to be false');
+assert.sameValue(arrayLike[9007199254740988], "two", 'The value of arrayLike[9007199254740988] is expected to be "two"');
+assert.sameValue(9007199254740989 in arrayLike, false, 'The result of evaluating (9007199254740989 in arrayLike) is expected to be false');
+assert.sameValue(arrayLike[9007199254740990], "zero", 'The value of arrayLike[9007199254740990] is expected to be "zero"');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reverse/length.js b/js/src/tests/test262/built-ins/Array/prototype/reverse/length.js
new file mode 100644
index 0000000000..fb5562c43d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reverse/length.js
@@ -0,0 +1,30 @@
+// Copyright (C) 2017 Leo Balter. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reverse
+description: >
+  The "length" property of Array.prototype.reverse
+info: |
+  17 ECMAScript Standard Built-in Objects
+
+  Every built-in function object, including constructors, has a length property
+  whose value is an integer. Unless otherwise specified, this value is equal to
+  the largest number of named arguments shown in the subclause headings for the
+  function description. Optional parameters (which are indicated with brackets:
+  [ ]) or rest parameters (which are shown using the form «...name») are not
+  included in the default argument count.
+
+  Unless otherwise specified, the length property of a built-in function object
+  has the attributes { [[Writable]]: false, [[Enumerable]]: false,
+    [[Configurable]]: true }.
+includes: [propertyHelper.js]
+---*/
+
+assert.sameValue(Array.prototype.reverse.length, 0);
+
+verifyNotEnumerable(Array.prototype.reverse, 'length');
+verifyNotWritable(Array.prototype.reverse, 'length');
+verifyConfigurable(Array.prototype.reverse, 'length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reverse/name.js b/js/src/tests/test262/built-ins/Array/prototype/reverse/name.js
new file mode 100644
index 0000000000..450398c5d7
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reverse/name.js
@@ -0,0 +1,28 @@
+// Copyright (C) 2015 André Bargull. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reverse
+description: >
+  Array.prototype.reverse.name is "reverse".
+info: |
+  Array.prototype.reverse ( )
+
+  17 ECMAScript Standard Built-in Objects:
+    Every built-in Function object, including constructors, that is not
+    identified as an anonymous function has a name property whose value
+    is a String.
+
+    Unless otherwise specified, the name property of a built-in Function
+    object, if it exists, has the attributes { [[Writable]]: false,
+    [[Enumerable]]: false, [[Configurable]]: true }.
+includes: [propertyHelper.js]
+---*/
+
+assert.sameValue(Array.prototype.reverse.name, "reverse");
+
+verifyNotEnumerable(Array.prototype.reverse, "name");
+verifyNotWritable(Array.prototype.reverse, "name");
+verifyConfigurable(Array.prototype.reverse, "name");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reverse/not-a-constructor.js b/js/src/tests/test262/built-ins/Array/prototype/reverse/not-a-constructor.js
new file mode 100644
index 0000000000..693a459165
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reverse/not-a-constructor.js
@@ -0,0 +1,35 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Array.prototype.reverse does not implement [[Construct]], is not new-able
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+
+  sec-evaluatenew
+
+  ...
+  7. If IsConstructor(constructor) is false, throw a TypeError exception.
+  ...
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Array.prototype.reverse),
+  false,
+  'isConstructor(Array.prototype.reverse) must return false'
+);
+
+assert.throws(TypeError, () => {
+  new Array.prototype.reverse();
+}, '`new Array.prototype.reverse()` throws TypeError');
+
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reverse/prop-desc.js b/js/src/tests/test262/built-ins/Array/prototype/reverse/prop-desc.js
new file mode 100644
index 0000000000..6752c1d89e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reverse/prop-desc.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2017 Leo Balter. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.reverse
+description: >
+  "reverse" property of Array.prototype
+info: |
+  17 ECMAScript Standard Built-in Objects
+  
+  Every other data property described in clauses 18 through 26 and in Annex B.2
+  has the attributes { [[Writable]]: true, [[Enumerable]]: false,
+    [[Configurable]]: true } unless otherwise specified.
+includes: [propertyHelper.js]
+---*/
+
+assert.sameValue(typeof Array.prototype.reverse, 'function', 'typeof');
+
+verifyNotEnumerable(Array.prototype, "reverse");
+verifyWritable(Array.prototype, "reverse");
+verifyConfigurable(Array.prototype, "reverse");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reverse/shell.js b/js/src/tests/test262/built-ins/Array/prototype/reverse/shell.js
new file mode 100644
index 0000000000..bc72493f03
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reverse/shell.js
@@ -0,0 +1,33 @@
+// GENERATED, DO NOT EDIT
+// file: proxyTrapsHelper.js
+// Copyright (C) 2016 Jordan Harband.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+description: |
+    Used to assert the correctness of object behavior in the presence
+    and context of Proxy objects.
+defines: [allowProxyTraps]
+---*/
+
+function allowProxyTraps(overrides) {
+  function throwTest262Error(msg) {
+    return function () { throw new Test262Error(msg); };
+  }
+  if (!overrides) { overrides = {}; }
+  return {
+    getPrototypeOf: overrides.getPrototypeOf || throwTest262Error('[[GetPrototypeOf]] trap called'),
+    setPrototypeOf: overrides.setPrototypeOf || throwTest262Error('[[SetPrototypeOf]] trap called'),
+    isExtensible: overrides.isExtensible || throwTest262Error('[[IsExtensible]] trap called'),
+    preventExtensions: overrides.preventExtensions || throwTest262Error('[[PreventExtensions]] trap called'),
+    getOwnPropertyDescriptor: overrides.getOwnPropertyDescriptor || throwTest262Error('[[GetOwnProperty]] trap called'),
+    has: overrides.has || throwTest262Error('[[HasProperty]] trap called'),
+    get: overrides.get || throwTest262Error('[[Get]] trap called'),
+    set: overrides.set || throwTest262Error('[[Set]] trap called'),
+    deleteProperty: overrides.deleteProperty || throwTest262Error('[[Delete]] trap called'),
+    defineProperty: overrides.defineProperty || throwTest262Error('[[DefineOwnProperty]] trap called'),
+    enumerate: throwTest262Error('[[Enumerate]] trap called: this trap has been removed'),
+    ownKeys: overrides.ownKeys || throwTest262Error('[[OwnPropertyKeys]] trap called'),
+    apply: overrides.apply || throwTest262Error('[[Call]] trap called'),
+    construct: overrides.construct || throwTest262Error('[[Construct]] trap called')
+  };
+}
diff --git a/js/src/tests/test262/built-ins/Array/prototype/shell.js b/js/src/tests/test262/built-ins/Array/prototype/shell.js
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/js/src/tests/test262/built-ins/Array/prototype/shift/S15.4.4.9_A1.1_T1.js b/js/src/tests/test262/built-ins/Array/prototype/shift/S15.4.4.9_A1.1_T1.js
new file mode 100644
index 0000000000..1f70e9b735
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/shift/S15.4.4.9_A1.1_T1.js
@@ -0,0 +1,33 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    If length equal zero, call the [[Put]] method of this object
+    with arguments "length" and 0 and return undefined
+esid: sec-array.prototype.shift
+description: Checking this algorithm
+---*/
+
+var x = new Array();
+var shift = x.shift();
+if (shift !== undefined) {
+  throw new Test262Error('#1: var x = new Array(); x.shift() === undefined. Actual: ' + (shift));
+}
+
+if (x.length !== 0) {
+  throw new Test262Error('#2: var x = new Array(); x.shift(); x.length === 0. Actual: ' + (x.length));
+}
+
+var x = Array(1, 2, 3);
+x.length = 0;
+var shift = x.shift();
+if (shift !== undefined) {
+  throw new Test262Error('#2: var x = Array(1,2,3); x.length = 0; x.shift() === undefined. Actual: ' + (shift));
+}
+
+if (x.length !== 0) {
+  throw new Test262Error('#4: var x = new Array(1,2,3); x.length = 0; x.shift(); x.length === 0. Actual: ' + (x.length));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/shift/S15.4.4.9_A1.2_T1.js b/js/src/tests/test262/built-ins/Array/prototype/shift/S15.4.4.9_A1.2_T1.js
new file mode 100644
index 0000000000..a0e9c13392
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/shift/S15.4.4.9_A1.2_T1.js
@@ -0,0 +1,60 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    The first element of the array is removed from the array and
+    returned
+esid: sec-array.prototype.shift
+description: Checking this use new Array() and []
+---*/
+
+var x = new Array(0, 1, 2, 3);
+var shift = x.shift();
+if (shift !== 0) {
+  throw new Test262Error('#1: x = new Array(0,1,2,3); x.shift() === 0. Actual: ' + (shift));
+}
+
+if (x.length !== 3) {
+  throw new Test262Error('#2: x = new Array(0,1,2,3); x.shift(); x.length == 3');
+}
+
+if (x[0] !== 1) {
+  throw new Test262Error('#3: x = new Array(0,1,2,3); x.shift(); x[0] == 1');
+}
+
+if (x[1] !== 2) {
+  throw new Test262Error('#4: x = new Array(0,1,2,3); x.shift(); x[1] == 2');
+}
+
+x = [];
+x[0] = 0;
+x[3] = 3;
+var shift = x.shift();
+if (shift !== 0) {
+  throw new Test262Error('#5: x = []; x[0] = 0; x[3] = 3; x.shift() === 0. Actual: ' + (shift));
+}
+
+if (x.length !== 3) {
+  throw new Test262Error('#6: x = []; x[0] = 0; x[3] = 3; x.shift(); x.length == 3');
+}
+
+if (x[0] !== undefined) {
+  throw new Test262Error('#7: x = []; x[0] = 0; x[3] = 3; x.shift(); x[0] == undefined');
+}
+
+if (x[12] !== undefined) {
+  throw new Test262Error('#8: x = []; x[0] = 0; x[3] = 3; x.shift(); x[1] == undefined');
+}
+
+x.length = 1;
+var shift = x.shift();
+if (shift !== undefined) {
+  throw new Test262Error('#9: x = []; x[0] = 0; x[3] = 3; x.shift(); x.length = 1; x.shift() === undefined. Actual: ' + (shift));
+}
+
+if (x.length !== 0) {
+  throw new Test262Error('#10: x = []; x[0] = 0; x[3] = 3; x.shift(); x.length = 1; x.shift(); x.length === 0. Actual: ' + (x.length));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/shift/S15.4.4.9_A2_T1.js b/js/src/tests/test262/built-ins/Array/prototype/shift/S15.4.4.9_A2_T1.js
new file mode 100644
index 0000000000..29f2f4f311
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/shift/S15.4.4.9_A2_T1.js
@@ -0,0 +1,49 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    The shift function is intentionally generic.
+    It does not require that its this value be an Array object
+esid: sec-array.prototype.shift
+description: >
+    If ToUint32(length) equal zero, call the [[Put]] method  of this
+    object with arguments "length" and 0 and return undefined
+---*/
+
+var obj = {};
+obj.shift = Array.prototype.shift;
+
+if (obj.length !== undefined) {
+  throw new Test262Error('#0: var obj = {}; obj.length === undefined. Actual: ' + (obj.length));
+} else {
+  var shift = obj.shift();
+  if (shift !== undefined) {
+    throw new Test262Error('#1: var obj = {}; obj.shift = Array.prototype.shift; obj.shift() === undefined. Actual: ' + (shift));
+  }
+  if (obj.length !== 0) {
+    throw new Test262Error('#2: var obj = {}; obj.shift = Array.prototype.shift; obj.shift(); obj.length === 0. Actual: ' + (obj.length));
+  }
+}
+
+obj.length = undefined;
+var shift = obj.shift();
+if (shift !== undefined) {
+  throw new Test262Error('#3: var obj = {}; obj.length = undefined; obj.shift = Array.prototype.shift; obj.shift() === undefined. Actual: ' + (shift));
+}
+
+if (obj.length !== 0) {
+  throw new Test262Error('#4: var obj = {}; obj.length = undefined; obj.shift = Array.prototype.shift; obj.shift(); obj.length === 0. Actual: ' + (obj.length));
+}
+
+obj.length = null
+var shift = obj.shift();
+if (shift !== undefined) {
+  throw new Test262Error('#5: var obj = {}; obj.length = null; obj.shift = Array.prototype.shift; obj.shift() === undefined. Actual: ' + (shift));
+}
+
+if (obj.length !== 0) {
+  throw new Test262Error('#6: var obj = {}; obj.length = null; obj.shift = Array.prototype.shift; obj.shift(); obj.length === 0. Actual: ' + (obj.length));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/shift/S15.4.4.9_A2_T2.js b/js/src/tests/test262/built-ins/Array/prototype/shift/S15.4.4.9_A2_T2.js
new file mode 100644
index 0000000000..cbe2c18644
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/shift/S15.4.4.9_A2_T2.js
@@ -0,0 +1,71 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    The shift function is intentionally generic.
+    It does not require that its this value be an Array object
+esid: sec-array.prototype.shift
+description: >
+    If ToUint32(length) equal zero, call the [[Put]] method  of this
+    object with arguments "length" and 0 and return undefined
+---*/
+
+var obj = {};
+obj.shift = Array.prototype.shift;
+
+obj.length = NaN;
+var shift = obj.shift();
+if (shift !== undefined) {
+  throw new Test262Error('#1: var obj = {}; obj.length = NaN; obj.shift = Array.prototype.shift; obj.shift() === undefined. Actual: ' + (shift));
+}
+
+if (obj.length !== 0) {
+  throw new Test262Error('#2: var obj = {}; obj.length = NaN; obj.shift = Array.prototype.shift; obj.shift(); obj.length === 0. Actual: ' + (obj.length));
+}
+
+obj.length = Number.NEGATIVE_INFINITY;
+var shift = obj.shift();
+if (shift !== undefined) {
+  throw new Test262Error('#5: var obj = {}; obj.length = Number.NEGATIVE_INFINITY; obj.shift = Array.prototype.shift; obj.shift() === undefined. Actual: ' + (shift));
+}
+
+if (obj.length !== 0) {
+  throw new Test262Error('#6: var obj = {}; obj.length = Number.NEGATIVE_INFINITY; obj.shift = Array.prototype.shift; obj.shift(); obj.length === 0. Actual: ' + (obj.length));
+}
+
+obj.length = -0;
+var shift = obj.shift();
+if (shift !== undefined) {
+  throw new Test262Error('#7: var obj = {}; obj.length = -0; obj.shift = Array.prototype.shift; obj.shift() === undefined. Actual: ' + (shift));
+}
+
+if (obj.length !== 0) {
+  throw new Test262Error('#8: var obj = {}; obj.length = -0; obj.shift = Array.prototype.shift; obj.shift(); obj.length === 0. Actual: ' + (obj.length));
+} else {
+  if (1 / obj.length !== Number.POSITIVE_INFINITY) {
+    throw new Test262Error('#8: var obj = {}; obj.length = -0; obj.shift = Array.prototype.shift; obj.shift(); obj.length === +0. Actual: ' + (obj.length));
+  }
+}
+
+obj.length = 0.5;
+var shift = obj.shift();
+if (shift !== undefined) {
+  throw new Test262Error('#9: var obj = {}; obj.length = 0.5; obj.shift = Array.prototype.shift; obj.shift() === undefined. Actual: ' + (shift));
+}
+
+if (obj.length !== 0) {
+  throw new Test262Error('#10: var obj = {}; obj.length = 0.5; obj.shift = Array.prototype.shift; obj.shift(); obj.length === 0. Actual: ' + (obj.length));
+}
+
+obj.length = new Number(0);
+var shift = obj.shift();
+if (shift !== undefined) {
+  throw new Test262Error('#11: var obj = {}; obj.length = new Number(0); obj.shift = Array.prototype.shift; obj.shift() === undefined. Actual: ' + (shift));
+}
+
+if (obj.length !== 0) {
+  throw new Test262Error('#12: var obj = {}; obj.length = new Number(0); obj.shift = Array.prototype.shift; obj.shift(); obj.length === 0. Actual: ' + (obj.length));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/shift/S15.4.4.9_A2_T3.js b/js/src/tests/test262/built-ins/Array/prototype/shift/S15.4.4.9_A2_T3.js
new file mode 100644
index 0000000000..13d371b6ee
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/shift/S15.4.4.9_A2_T3.js
@@ -0,0 +1,37 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    The shift function is intentionally generic.
+    It does not require that its this value be an Array object
+esid: sec-array.prototype.shift
+description: >
+    The first element of the array is removed from the array and
+    returned
+---*/
+
+var obj = {};
+obj.shift = Array.prototype.shift;
+
+obj.length = 2.5;
+var shift = obj.shift();
+if (shift !== undefined) {
+  throw new Test262Error('#1: var obj = {}; obj.length = 2.5; obj.shift = Array.prototype.shift; obj.shift() === undefined. Actual: ' + (shift));
+}
+
+if (obj.length !== 1) {
+  throw new Test262Error('#2: var obj = {}; obj.length = 2.5; obj.shift = Array.prototype.shift; obj.shift(); obj.length === 1. Actual: ' + (obj.length));
+}
+
+obj.length = new Number(2);
+var shift = obj.shift();
+if (shift !== undefined) {
+  throw new Test262Error('#11: var obj = {}; obj.length = new Number(2); obj.shift = Array.prototype.shift; obj.shift() === undefined. Actual: ' + (shift));
+}
+
+if (obj.length !== 1) {
+  throw new Test262Error('#12: var obj = {}; obj.length = new Number(2); obj.shift = Array.prototype.shift; obj.shift(); obj.length === 1. Actual: ' + (obj.length));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/shift/S15.4.4.9_A2_T4.js b/js/src/tests/test262/built-ins/Array/prototype/shift/S15.4.4.9_A2_T4.js
new file mode 100644
index 0000000000..1f315396cd
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/shift/S15.4.4.9_A2_T4.js
@@ -0,0 +1,48 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    The shift function is intentionally generic.
+    It does not require that its this value be an Array object
+esid: sec-array.prototype.shift
+description: >
+    The first element of the array is removed from the array and
+    returned
+---*/
+
+var obj = {};
+obj["0"] = 0;
+obj["3"] = 3;
+obj.shift = Array.prototype.shift;
+
+obj.length = 4;
+var shift = obj.shift();
+if (shift !== 0) {
+  throw new Test262Error('#1: var obj = {}; obj["0"] = 0; obj["3"] = 3; obj.length = 4; obj.shift = Array.prototype.shift; obj.shift() === 0. Actual: ' + (shift));
+}
+
+if (obj.length !== 3) {
+  throw new Test262Error('#2: var obj = {}; obj["0"] = 0; obj["3"] = 3; obj.length = 4; obj.shift = Array.prototype.shift; obj.shift(); obj.length === 3. Actual: ' + (obj.length));
+}
+
+var shift = obj.shift();
+if (shift !== undefined) {
+  throw new Test262Error('#3: var obj = {}; obj["0"] = 0; obj["3"] = 3; obj.length = 4; obj.shift = Array.prototype.shift; obj.shift(); obj.shift() === undefined. Actual: ' + (shift));
+}
+
+if (obj.length !== 2) {
+  throw new Test262Error('#4: var obj = {}; obj["0"] = 0; obj["3"] = 3; obj.length = 4; obj.shift = Array.prototype.shift; obj.shift(); obj.shift(); obj.length === 2. Actual: ' + (obj.length));
+}
+
+obj.length = 1;
+var shift = obj.shift();
+if (shift !== undefined) {
+  throw new Test262Error('#5: var obj = {}; obj["0"] = 0; obj["3"] = 3; obj.length = 4; obj.shift = Array.prototype.shift; obj.shift(); obj.shift(); obj.length = 1; obj.shift() === undefined. Actual: ' + (shift));
+}
+
+if (obj.length !== 0) {
+  throw new Test262Error('#6: var obj = {}; obj["0"] = 0; obj["3"] = 3; obj.length = 4; obj.shift = Array.prototype.shift; obj.shift(); obj.shift(); obj.length = 1; obj.shift(); obj.length === 0. Actual: ' + (obj.length));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/shift/S15.4.4.9_A2_T5.js b/js/src/tests/test262/built-ins/Array/prototype/shift/S15.4.4.9_A2_T5.js
new file mode 100644
index 0000000000..76b01bbe57
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/shift/S15.4.4.9_A2_T5.js
@@ -0,0 +1,126 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    The shift function is intentionally generic.
+    It does not require that its this value be an Array object
+esid: sec-array.prototype.shift
+description: >
+    Operator use ToNumber from length.  If Type(value) is Object,
+    evaluate ToPrimitive(value, Number)
+---*/
+
+var obj = {};
+obj.shift = Array.prototype.shift;
+
+obj[0] = -1;
+obj.length = {
+  valueOf() {
+    return 1
+  }
+};
+var shift = obj.shift();
+assert.sameValue(shift, -1, 'The value of shift is expected to be -1');
+
+obj[0] = -1;
+obj.length = {
+  valueOf() {
+    return 1
+  },
+  toString() {
+    return 0
+  }
+};
+var shift = obj.shift();
+assert.sameValue(shift, -1, 'The value of shift is expected to be -1');
+
+obj[0] = -1;
+obj.length = {
+  valueOf() {
+    return 1
+  },
+  toString() {
+    return {}
+  }
+};
+var shift = obj.shift();
+assert.sameValue(shift, -1, 'The value of shift is expected to be -1');
+
+try {
+  obj[0] = -1;
+  obj.length = {
+    valueOf() {
+      return 1
+    },
+    toString() {
+      throw "error"
+    }
+  };
+  var shift = obj.shift();
+  assert.sameValue(shift, -1, 'The value of shift is expected to be -1');
+}
+catch (e) {
+  assert.notSameValue(e, "error", 'The value of e is not "error"');
+}
+
+obj[0] = -1;
+obj.length = {
+  toString() {
+    return 0
+  }
+};
+var shift = obj.shift();
+assert.sameValue(shift, undefined, 'The value of shift is expected to equal undefined');
+
+obj[0] = -1;
+obj.length = {
+  valueOf() {
+    return {}
+  },
+  toString() {
+    return 0
+  }
+}
+var shift = obj.shift();
+assert.sameValue(shift, undefined, 'The value of shift is expected to equal undefined');
+
+try {
+  obj[0] = -1;
+  obj.length = {
+    valueOf() {
+      throw "error"
+    },
+    toString() {
+      return 0
+    }
+  };
+  var shift = obj.shift();
+  throw new Test262Error('#7.1: obj[0] = -1; obj.length = {valueOf() {throw "error"}, toString() {return 0}}; obj.shift() throw "error". Actual: ' + (shift));
+}
+catch (e) {
+  assert.sameValue(e, "error", 'The value of e is expected to be "error"');
+}
+
+try {
+  obj[0] = -1;
+  obj.length = {
+    valueOf() {
+      return {}
+    },
+    toString() {
+      return {}
+    }
+  };
+  var shift = obj.shift();
+  throw new Test262Error('#8.1: obj[0] = -1; obj.length = {valueOf() {return {}}, toString() {return {}}}  obj.shift() throw TypeError. Actual: ' + (shift));
+}
+catch (e) {
+  assert.sameValue(
+    e instanceof TypeError,
+    true,
+    'The result of evaluating (e instanceof TypeError) is expected to be true'
+  );
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/shift/S15.4.4.9_A3_T3.js b/js/src/tests/test262/built-ins/Array/prototype/shift/S15.4.4.9_A3_T3.js
new file mode 100644
index 0000000000..70d9a86cd0
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/shift/S15.4.4.9_A3_T3.js
@@ -0,0 +1,33 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: Check ToLength(length) for non Array objects
+esid: sec-array.prototype.shift
+description: length is arbitrarily
+---*/
+
+var obj = {};
+obj.shift = Array.prototype.shift;
+obj[0] = "x";
+obj[1] = "y";
+obj.length = -4294967294;
+
+var shift = obj.shift();
+if (shift !== undefined) {
+  throw new Test262Error('#1: var obj = {}; obj.shift = Array.prototype.shift; obj[0] = "x"; obj[1] = "y"; obj.length = -4294967294; obj.shift() === undefined. Actual: ' + (shift));
+}
+
+if (obj.length !== 0) {
+  throw new Test262Error('#2: var obj = {}; obj.shift = Array.prototype.shift; obj[0] = "x"; obj[1] = "y"; obj.length = -4294967294; obj.shift(); obj.length === 0. Actual: ' + (obj.length));
+}
+
+if (obj[0] !== "x") {
+  throw new Test262Error('#3: var obj = {}; obj.shift = Array.prototype.shift; obj[0] = "x"; obj[1] = "y"; obj.length = -4294967294; obj.shift(); obj[0] === "x". Actual: ' + (obj[0]));
+}
+
+if (obj[1] !== "y") {
+  throw new Test262Error('#4: var obj = {}; obj.shift = Array.prototype.shift; obj[0] = "x" obj[1] = "y"; obj.length = -4294967294; obj.shift(); obj[1] === "y". Actual: ' + (obj[1]));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/shift/S15.4.4.9_A4_T1.js b/js/src/tests/test262/built-ins/Array/prototype/shift/S15.4.4.9_A4_T1.js
new file mode 100644
index 0000000000..8865e88e73
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/shift/S15.4.4.9_A4_T1.js
@@ -0,0 +1,58 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: "[[Get]], [[Delete]] from not an inherited property"
+esid: sec-array.prototype.shift
+description: >
+    [[Prototype]] of Array instance is Array.prototype, [[Prototype]
+    of Array.prototype is Object.prototype
+---*/
+
+Array.prototype[1] = 1;
+var x = [0];
+x.length = 2;
+
+var shift = x.shift();
+if (shift !== 0) {
+  throw new Test262Error('#1: Array.prototype[1] = 1; x = [0]; x.length = 2; x.shift() === 0. Actual: ' + (shift));
+}
+
+if (x[0] !== 1) {
+  throw new Test262Error('#2: Array.prototype[1] = 1; x = [0]; x.length = 2; x.shift(); x[0] === 1. Actual: ' + (x[0]));
+}
+
+if (x[1] !== 1) {
+  throw new Test262Error('#3: Array.prototype[1] = 1; x = [0]; x.length = 2; x.shift(); x[1] === 1. Actual: ' + (x[1]));
+}
+
+Object.prototype[1] = 1;
+Object.prototype.length = 2;
+Object.prototype.shift = Array.prototype.shift;
+x = {
+  0: 0
+};
+
+var shift = x.shift();
+if (shift !== 0) {
+  throw new Test262Error('#4: Object.prototype[1] = 1; Object.prototype.length = 2; Object.prototype.shift = Array.prototype.shift; x = {0:0}; x.shift() === 0. Actual: ' + (shift));
+}
+
+if (x[0] !== 1) {
+  throw new Test262Error('#5: Object.prototype[1] = 1; Object.prototype.length = 2; Object.prototype.shift = Array.prototype.shift; x = {0:0}; x.shift(); x[0] === 1. Actual: ' + (x[0]));
+}
+
+if (x[1] !== 1) {
+  throw new Test262Error('#6: Object.prototype[1] = 1; Object.prototype.length = 2; Object.prototype.shift = Array.prototype.shift; x = {0:0}; x.shift(); x[1] === 1. Actual: ' + (x[1]));
+}
+
+if (x.length !== 1) {
+  throw new Test262Error('#7: Object.prototype[1] = 1; Object.prototype.length = 2; Object.prototype.shift = Array.prototype.shift; x = {0:0}; x.shift(); x.length === 1. Actual: ' + (x.length));
+}
+
+delete x.length;
+if (x.length !== 2) {
+  throw new Test262Error('#8: Object.prototype[1] = 1; Object.prototype.length = 2; Object.prototype.shift = Array.prototype.shift; x = {0:0}; x.shift(); delete x; x.length === 2. Actual: ' + (x.length));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/shift/S15.4.4.9_A4_T2.js b/js/src/tests/test262/built-ins/Array/prototype/shift/S15.4.4.9_A4_T2.js
new file mode 100644
index 0000000000..def860e177
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/shift/S15.4.4.9_A4_T2.js
@@ -0,0 +1,59 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: "[[Get]], [[Delete]] from not an inherited property"
+esid: sec-array.prototype.shift
+description: >
+    [[Prototype]] of Array instance is Array.prototype, [[Prototype]
+    of Array.prototype is Object.prototype
+---*/
+
+Array.prototype[1] = -1;
+var x = [0, 1];
+x.length = 2;
+
+var shift = x.shift();
+if (shift !== 0) {
+  throw new Test262Error('#1: Array.prototype[1] = -1; x = [0,1]; x.length = 2; x.shift() === 0. Actual: ' + (shift));
+}
+
+if (x[0] !== 1) {
+  throw new Test262Error('#2: Array.prototype[1] = -1; x = [0,1]; x.length = 2; x.shift(); x[0] === 1. Actual: ' + (x[0]));
+}
+
+if (x[1] !== -1) {
+  throw new Test262Error('#3: Array.prototype[1] = -1; x = [0,1]; x.length = 2; x.shift(); x[1] === -1. Actual: ' + (x[1]));
+}
+
+Object.prototype[1] = -1;
+Object.prototype.length = 2;
+Object.prototype.shift = Array.prototype.shift;
+x = {
+  0: 0,
+  1: 1
+};
+
+var shift = x.shift();
+if (shift !== 0) {
+  throw new Test262Error('#4: Object.prototype[1] = -1; Object.prototype.length = 2; Object.prototype.shift = Array.prototype.shift; x = {0:0,1:1}; x.shift() === 0. Actual: ' + (shift));
+}
+
+if (x[0] !== 1) {
+  throw new Test262Error('#5: Object.prototype[1] = -1; Object.prototype.length = 2; Object.prototype.shift = Array.prototype.shift; x = {0:0,1:1}; x.shift(); x[0] === 1. Actual: ' + (x[0]));
+}
+
+if (x[1] !== -1) {
+  throw new Test262Error('#6: Object.prototype[1] = -1; Object.prototype.length = 2; Object.prototype.shift = Array.prototype.shift; x = {0:0,1:1}; x.shift(); x[1] === -1. Actual: ' + (x[1]));
+}
+
+if (x.length !== 1) {
+  throw new Test262Error('#7: Object.prototype[1] = -1; Object.prototype.length = 2; Object.prototype.shift = Array.prototype.shift; x = {0:0,1:1}; x.shift(); x.length === 1. Actual: ' + (x.length));
+}
+
+delete x.length;
+if (x.length !== 2) {
+  throw new Test262Error('#8: Object.prototype[1] = -1; Object.prototype.length = 2; Object.prototype.shift = Array.prototype.shift; x = {0:0,1:1}; x.shift(); delete x; x.length === 2. Actual: ' + (x.length));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/shift/browser.js b/js/src/tests/test262/built-ins/Array/prototype/shift/browser.js
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/js/src/tests/test262/built-ins/Array/prototype/shift/call-with-boolean.js b/js/src/tests/test262/built-ins/Array/prototype/shift/call-with-boolean.js
new file mode 100644
index 0000000000..142fa3a6d0
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/shift/call-with-boolean.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2020 Rick Waldron.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.shift
+description: Array.prototype.shift applied to boolean primitive
+---*/
+
+assert.sameValue(
+  Array.prototype.shift.call(true),
+  undefined,
+  'Array.prototype.shift.call(true) must return undefined'
+);
+assert.sameValue(
+  Array.prototype.shift.call(false),
+  undefined,
+  'Array.prototype.shift.call(false) must return undefined'
+);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/shift/length.js b/js/src/tests/test262/built-ins/Array/prototype/shift/length.js
new file mode 100644
index 0000000000..08932c056d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/shift/length.js
@@ -0,0 +1,30 @@
+// Copyright (C) 2017 Leo Balter. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.shift
+description: >
+  The "length" property of Array.prototype.shift
+info: |
+  17 ECMAScript Standard Built-in Objects
+
+  Every built-in function object, including constructors, has a length property
+  whose value is an integer. Unless otherwise specified, this value is equal to
+  the largest number of named arguments shown in the subclause headings for the
+  function description. Optional parameters (which are indicated with brackets:
+  [ ]) or rest parameters (which are shown using the form «...name») are not
+  included in the default argument count.
+
+  Unless otherwise specified, the length property of a built-in function object
+  has the attributes { [[Writable]]: false, [[Enumerable]]: false,
+    [[Configurable]]: true }.
+includes: [propertyHelper.js]
+---*/
+
+assert.sameValue(Array.prototype.shift.length, 0);
+
+verifyNotEnumerable(Array.prototype.shift, 'length');
+verifyNotWritable(Array.prototype.shift, 'length');
+verifyConfigurable(Array.prototype.shift, 'length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/shift/name.js b/js/src/tests/test262/built-ins/Array/prototype/shift/name.js
new file mode 100644
index 0000000000..a64cdab03f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/shift/name.js
@@ -0,0 +1,28 @@
+// Copyright (C) 2015 André Bargull. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.shift
+description: >
+  Array.prototype.shift.name is "shift".
+info: |
+  Array.prototype.shift ( )
+
+  17 ECMAScript Standard Built-in Objects:
+    Every built-in Function object, including constructors, that is not
+    identified as an anonymous function has a name property whose value
+    is a String.
+
+    Unless otherwise specified, the name property of a built-in Function
+    object, if it exists, has the attributes { [[Writable]]: false,
+    [[Enumerable]]: false, [[Configurable]]: true }.
+includes: [propertyHelper.js]
+---*/
+
+assert.sameValue(Array.prototype.shift.name, "shift");
+
+verifyNotEnumerable(Array.prototype.shift, "name");
+verifyNotWritable(Array.prototype.shift, "name");
+verifyConfigurable(Array.prototype.shift, "name");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/shift/not-a-constructor.js b/js/src/tests/test262/built-ins/Array/prototype/shift/not-a-constructor.js
new file mode 100644
index 0000000000..b58cbbb0fa
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/shift/not-a-constructor.js
@@ -0,0 +1,35 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Array.prototype.shift does not implement [[Construct]], is not new-able
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+
+  sec-evaluatenew
+
+  ...
+  7. If IsConstructor(constructor) is false, throw a TypeError exception.
+  ...
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Array.prototype.shift),
+  false,
+  'isConstructor(Array.prototype.shift) must return false'
+);
+
+assert.throws(TypeError, () => {
+  new Array.prototype.shift();
+}, '`new Array.prototype.shift()` throws TypeError');
+
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/shift/prop-desc.js b/js/src/tests/test262/built-ins/Array/prototype/shift/prop-desc.js
new file mode 100644
index 0000000000..851e87947e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/shift/prop-desc.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2017 Leo Balter. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.shift
+description: >
+  "shift" property of Array.prototype
+info: |
+  17 ECMAScript Standard Built-in Objects
+  
+  Every other data property described in clauses 18 through 26 and in Annex B.2
+  has the attributes { [[Writable]]: true, [[Enumerable]]: false,
+    [[Configurable]]: true } unless otherwise specified.
+includes: [propertyHelper.js]
+---*/
+
+assert.sameValue(typeof Array.prototype.shift, 'function', 'typeof');
+
+verifyNotEnumerable(Array.prototype, "shift");
+verifyWritable(Array.prototype, "shift");
+verifyConfigurable(Array.prototype, "shift");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/shift/set-length-array-is-frozen.js b/js/src/tests/test262/built-ins/Array/prototype/shift/set-length-array-is-frozen.js
new file mode 100644
index 0000000000..30064e098d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/shift/set-length-array-is-frozen.js
@@ -0,0 +1,45 @@
+// Copyright (C) 2022 Apple Inc. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.shift
+description: >
+  A TypeError is thrown when "length" is [[Set]] on a frozen array.
+info: |
+  Array.prototype.shift ( )
+
+  [...]
+  4. Let first be ? Get(O, "0").
+  [...]
+  8. Perform ? Set(O, "length", 𝔽(len - 1), true).
+
+  OrdinarySetWithOwnDescriptor ( O, P, V, Receiver, ownDesc )
+
+  [...]
+  2. If IsDataDescriptor(ownDesc) is true, then
+    a. If ownDesc.[[Writable]] is false, return false.
+
+  Set ( O, P, V, Throw )
+
+  [...]
+  1. Let success be ? O.[[Set]](P, V, O).
+  2. If success is false and Throw is true, throw a TypeError exception.
+---*/
+
+var array = new Array(1);
+var arrayPrototypeGet0Calls = 0;
+
+Object.defineProperty(Array.prototype, "0", {
+  get() {
+    Object.freeze(array);
+    arrayPrototypeGet0Calls++;
+  },
+});
+
+assert.throws(TypeError, function() {
+  array.shift();
+});
+
+assert.sameValue(array.length, 1);
+assert.sameValue(arrayPrototypeGet0Calls, 1);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/shift/set-length-array-length-is-non-writable.js b/js/src/tests/test262/built-ins/Array/prototype/shift/set-length-array-length-is-non-writable.js
new file mode 100644
index 0000000000..2094475bd9
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/shift/set-length-array-length-is-non-writable.js
@@ -0,0 +1,45 @@
+// Copyright (C) 2022 Apple Inc. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.shift
+description: >
+  A TypeError is thrown when "length" is [[Set]] on an array with non-writable "length".
+info: |
+  Array.prototype.shift ( )
+
+  [...]
+  4. Let first be ? Get(O, "0").
+  [...]
+  8. Perform ? Set(O, "length", 𝔽(len - 1), true).
+
+  OrdinarySetWithOwnDescriptor ( O, P, V, Receiver, ownDesc )
+
+  [...]
+  2. If IsDataDescriptor(ownDesc) is true, then
+    a. If ownDesc.[[Writable]] is false, return false.
+
+  Set ( O, P, V, Throw )
+
+  [...]
+  1. Let success be ? O.[[Set]](P, V, O).
+  2. If success is false and Throw is true, throw a TypeError exception.
+---*/
+
+var array = new Array(1);
+var arrayPrototypeGet0Calls = 0;
+
+Object.defineProperty(Array.prototype, "0", {
+  get() {
+    Object.defineProperty(array, "length", { writable: false });
+    arrayPrototypeGet0Calls++;
+  },
+});
+
+assert.throws(TypeError, function() {
+  array.shift();
+});
+
+assert.sameValue(array.length, 1);
+assert.sameValue(arrayPrototypeGet0Calls, 1);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/shift/set-length-zero-array-is-frozen.js b/js/src/tests/test262/built-ins/Array/prototype/shift/set-length-zero-array-is-frozen.js
new file mode 100644
index 0000000000..6e5a16be2d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/shift/set-length-zero-array-is-frozen.js
@@ -0,0 +1,34 @@
+// Copyright (C) 2022 Apple Inc. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.shift
+description: >
+  A TypeError is thrown when "length" is [[Set]] on an empty frozen array.
+info: |
+  Array.prototype.shift ( )
+
+  [...]
+  3. If len = 0, then
+    a. Perform ? Set(O, "length", +0𝔽, true).
+
+  OrdinarySetWithOwnDescriptor ( O, P, V, Receiver, ownDesc )
+
+  [...]
+  2. If IsDataDescriptor(ownDesc) is true, then
+    a. If ownDesc.[[Writable]] is false, return false.
+
+  Set ( O, P, V, Throw )
+
+  [...]
+  1. Let success be ? O.[[Set]](P, V, O).
+  2. If success is false and Throw is true, throw a TypeError exception.
+---*/
+
+var array = [];
+Object.freeze(array);
+
+assert.throws(TypeError, function() {
+  array.shift();
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/shift/set-length-zero-array-length-is-non-writable.js b/js/src/tests/test262/built-ins/Array/prototype/shift/set-length-zero-array-length-is-non-writable.js
new file mode 100644
index 0000000000..d7ee7f8f6e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/shift/set-length-zero-array-length-is-non-writable.js
@@ -0,0 +1,34 @@
+// Copyright (C) 2022 Apple Inc. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.shift
+description: >
+  A TypeError is thrown when "length" is [[Set]] on an empty array with non-writable "length".
+info: |
+  Array.prototype.shift ( )
+
+  [...]
+  3. If len = 0, then
+    a. Perform ? Set(O, "length", +0𝔽, true).
+
+  OrdinarySetWithOwnDescriptor ( O, P, V, Receiver, ownDesc )
+
+  [...]
+  2. If IsDataDescriptor(ownDesc) is true, then
+    a. If ownDesc.[[Writable]] is false, return false.
+
+  Set ( O, P, V, Throw )
+
+  [...]
+  1. Let success be ? O.[[Set]](P, V, O).
+  2. If success is false and Throw is true, throw a TypeError exception.
+---*/
+
+var array = [];
+Object.defineProperty(array, "length", { writable: false });
+
+assert.throws(TypeError, function() {
+  array.shift();
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/shift/shell.js b/js/src/tests/test262/built-ins/Array/prototype/shift/shell.js
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/js/src/tests/test262/built-ins/Array/prototype/shift/throws-when-this-value-length-is-writable-false.js b/js/src/tests/test262/built-ins/Array/prototype/shift/throws-when-this-value-length-is-writable-false.js
new file mode 100644
index 0000000000..1c03b29e68
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/shift/throws-when-this-value-length-is-writable-false.js
@@ -0,0 +1,37 @@
+// Copyright (C) 2020 Sony Interactive Entertainment Inc. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.shift
+description: >
+  Array#shift throws TypeError if this value's "length" property was defined with [[Writable]]: false.
+info: |
+  Array.prototype.shift ( )
+  ...
+  3. If len is zero, then
+    a. Perform ? Set(O, "length", 0, true).
+    ...
+  8. Perform ? Set(O, "length", len - 1, true).
+
+  Set ( O, P, V, Throw )
+  ...
+  4. Let success be ? O.[[Set]](P, V, O).
+  5. If success is false and Throw is true, throw a TypeError exception.
+---*/
+
+assert.throws(TypeError, () => {
+  Array.prototype.shift.call('');
+}, "Array.prototype.shift.call('')");
+
+assert.throws(TypeError, () => {
+  Array.prototype.shift.call('abc');
+}, "Array.prototype.shift.call('abc')");
+
+assert.throws(TypeError, () => {
+  Array.prototype.shift.call(function() {});
+}, "Array.prototype.shift.call(function() {})");
+
+assert.throws(TypeError, () => {
+  Array.prototype.shift.call(Object.defineProperty({}, 'length', {writable: false}));
+}, "Array.prototype.shift.call(Object.defineProperty({}, 'length', {writable: false}))");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/slice/15.4.4.10-10-c-ii-1.js b/js/src/tests/test262/built-ins/Array/prototype/slice/15.4.4.10-10-c-ii-1.js
new file mode 100644
index 0000000000..4289b144ca
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/slice/15.4.4.10-10-c-ii-1.js
@@ -0,0 +1,25 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.slice
+description: >
+    Array.prototype.slice will slice a string from start to end when
+    index property (read-only) exists in Array.prototype (Step 10.c.ii)
+---*/
+
+var arrObj = [1, 2, 3];
+
+Object.defineProperty(Array.prototype, "0", {
+  value: "test",
+  writable: false,
+  configurable: true
+});
+
+var newArr = arrObj.slice(0, 1);
+
+assert(newArr.hasOwnProperty("0"), 'newArr.hasOwnProperty("0") !== true');
+assert.sameValue(newArr[0], 1, 'newArr[0]');
+assert.sameValue(typeof newArr[1], "undefined", 'typeof newArr[1]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/slice/S15.4.4.10_A1.1_T1.js b/js/src/tests/test262/built-ins/Array/prototype/slice/S15.4.4.10_A1.1_T1.js
new file mode 100644
index 0000000000..08b9e8f6ea
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/slice/S15.4.4.10_A1.1_T1.js
@@ -0,0 +1,40 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    If start is positive, use min(start, length).
+    If end is positive, use min(end, length)
+esid: sec-array.prototype.slice
+description: length > end > start = 0
+---*/
+
+var x = [0, 1, 2, 3, 4];
+var arr = x.slice(0, 3);
+
+arr.getClass = Object.prototype.toString;
+if (arr.getClass() !== "[object " + "Array" + "]") {
+  throw new Test262Error('#1: var x = [0,1,2,3,4]; var arr = x.slice(0,3); arr is Array object. Actual: ' + (arr.getClass()));
+}
+
+if (arr.length !== 3) {
+  throw new Test262Error('#2: var x = [0,1,2,3,4]; var arr = x.slice(0,3); arr.length === 3. Actual: ' + (arr.length));
+}
+
+if (arr[0] !== 0) {
+  throw new Test262Error('#3: var x = [0,1,2,3,4]; var arr = x.slice(0,3); arr[0] === 0. Actual: ' + (arr[0]));
+}
+
+if (arr[1] !== 1) {
+  throw new Test262Error('#4: var x = [0,1,2,3,4]; var arr = x.slice(0,3); arr[1] === 1. Actual: ' + (arr[1]));
+}
+
+if (arr[2] !== 2) {
+  throw new Test262Error('#5: var x = [0,1,2,3,4]; var arr = x.slice(0,3); arr[2] === 2. Actual: ' + (arr[2]));
+}
+
+if (arr[3] !== undefined) {
+  throw new Test262Error('#6: var x = [0,1,2,3,4]; var arr = x.slice(0,3); arr[3] === undefined. Actual: ' + (arr[3]));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/slice/S15.4.4.10_A1.1_T2.js b/js/src/tests/test262/built-ins/Array/prototype/slice/S15.4.4.10_A1.1_T2.js
new file mode 100644
index 0000000000..e2ad4f1103
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/slice/S15.4.4.10_A1.1_T2.js
@@ -0,0 +1,28 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    If start is positive, use min(start, length).
+    If end is positive, use min(end, length)
+esid: sec-array.prototype.slice
+description: length > end = start > 0
+---*/
+
+var x = [0, 1, 2, 3, 4];
+var arr = x.slice(3, 3);
+
+arr.getClass = Object.prototype.toString;
+if (arr.getClass() !== "[object " + "Array" + "]") {
+  throw new Test262Error('#1: var x = [0,1,2,3,4]; var arr = x.slice(3,3); arr is Array object. Actual: ' + (arr.getClass()));
+}
+
+if (arr.length !== 0) {
+  throw new Test262Error('#2: var x = [0,1,2,3,4]; var arr = x.slice(3,3); arr.length === 0. Actual: ' + (arr.length));
+}
+
+if (arr[0] !== undefined) {
+  throw new Test262Error('#3: var x = [0,1,2,3,4]; var arr = x.slice(3,3); arr[0] === undefined. Actual: ' + (arr[0]));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/slice/S15.4.4.10_A1.1_T3.js b/js/src/tests/test262/built-ins/Array/prototype/slice/S15.4.4.10_A1.1_T3.js
new file mode 100644
index 0000000000..098fe5df6a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/slice/S15.4.4.10_A1.1_T3.js
@@ -0,0 +1,28 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    If start is positive, use min(start, length).
+    If end is positive, use min(end, length)
+esid: sec-array.prototype.slice
+description: length > start > end > 0
+---*/
+
+var x = [0, 1, 2, 3, 4];
+var arr = x.slice(4, 3);
+
+arr.getClass = Object.prototype.toString;
+if (arr.getClass() !== "[object " + "Array" + "]") {
+  throw new Test262Error('#1: var x = [0,1,2,3,4]; var arr = x.slice(4,3); arr is Array object. Actual: ' + (arr.getClass()));
+}
+
+if (arr.length !== 0) {
+  throw new Test262Error('#2: var x = [0,1,2,3,4]; var arr = x.slice(4,3); arr.length === 0. Actual: ' + (arr.length));
+}
+
+if (arr[0] !== undefined) {
+  throw new Test262Error('#3: var x = [0,1,2,3,4]; var arr = x.slice(4,3); arr[0] === undefined. Actual: ' + (arr[0]));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/slice/S15.4.4.10_A1.1_T4.js b/js/src/tests/test262/built-ins/Array/prototype/slice/S15.4.4.10_A1.1_T4.js
new file mode 100644
index 0000000000..2a60f0819c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/slice/S15.4.4.10_A1.1_T4.js
@@ -0,0 +1,28 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    If start is positive, use min(start, length).
+    If end is positive, use min(end, length)
+esid: sec-array.prototype.slice
+description: length = end = start > 0
+---*/
+
+var x = [0, 1, 2, 3, 4];
+var arr = x.slice(5, 5);
+
+arr.getClass = Object.prototype.toString;
+if (arr.getClass() !== "[object " + "Array" + "]") {
+  throw new Test262Error('#1: var x = [0,1,2,3,4]; var arr = x.slice(5,5); arr is Array object. Actual: ' + (arr.getClass()));
+}
+
+if (arr.length !== 0) {
+  throw new Test262Error('#2: var x = [0,1,2,3,4]; var arr = x.slice(5,5); arr.length === 0. Actual: ' + (arr.length));
+}
+
+if (arr[0] !== undefined) {
+  throw new Test262Error('#3: var x = [0,1,2,3,4]; var arr = x.slice(5,5); arr[0] === undefined. Actual: ' + (arr[0]));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/slice/S15.4.4.10_A1.1_T5.js b/js/src/tests/test262/built-ins/Array/prototype/slice/S15.4.4.10_A1.1_T5.js
new file mode 100644
index 0000000000..52276cb431
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/slice/S15.4.4.10_A1.1_T5.js
@@ -0,0 +1,36 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    If start is positive, use min(start, length).
+    If end is positive, use min(end, length)
+esid: sec-array.prototype.slice
+description: length = end > start > 0
+---*/
+
+var x = [0, 1, 2, 3, 4];
+var arr = x.slice(3, 5);
+
+arr.getClass = Object.prototype.toString;
+if (arr.getClass() !== "[object " + "Array" + "]") {
+  throw new Test262Error('#1: var x = [0,1,2,3,4]; var arr = x.slice(3,5); arr is Array object. Actual: ' + (arr.getClass()));
+}
+
+if (arr.length !== 2) {
+  throw new Test262Error('#2: var x = [0,1,2,3,4]; var arr = x.slice(3,5); arr.length === 2. Actual: ' + (arr.length));
+}
+
+if (arr[0] !== 3) {
+  throw new Test262Error('#3: var x = [0,1,2,3,4]; var arr = x.slice(3,5); arr[0] === 3. Actual: ' + (arr[0]));
+}
+
+if (arr[1] !== 4) {
+  throw new Test262Error('#4: var x = [0,1,2,3,4]; var arr = x.slice(3,5); arr[1] === 4. Actual: ' + (arr[1]));
+}
+
+if (arr[3] !== undefined) {
+  throw new Test262Error('#5: var x = [0,1,2,3,4]; var arr = x.slice(3,5); arr[3] === undefined. Actual: ' + (arr[3]));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/slice/S15.4.4.10_A1.1_T6.js b/js/src/tests/test262/built-ins/Array/prototype/slice/S15.4.4.10_A1.1_T6.js
new file mode 100644
index 0000000000..c33acf360c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/slice/S15.4.4.10_A1.1_T6.js
@@ -0,0 +1,36 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    If start is positive, use min(start, length).
+    If end is positive, use min(end, length)
+esid: sec-array.prototype.slice
+description: length > end > start > 0;
+---*/
+
+var x = [0, 1, 2, 3, 4];
+var arr = x.slice(2, 4);
+
+arr.getClass = Object.prototype.toString;
+if (arr.getClass() !== "[object " + "Array" + "]") {
+  throw new Test262Error('#1: var x = [0,1,2,3,4]; var arr = x.slice(2,4); arr is Array object. Actual: ' + (arr.getClass()));
+}
+
+if (arr.length !== 2) {
+  throw new Test262Error('#2: var x = [0,1,2,3,4]; var arr = x.slice(2,4); arr.length === 2. Actual: ' + (arr.length));
+}
+
+if (arr[0] !== 2) {
+  throw new Test262Error('#3: var x = [0,1,2,3,4]; var arr = x.slice(2,4); arr[0] === 2. Actual: ' + (arr[0]));
+}
+
+if (arr[1] !== 3) {
+  throw new Test262Error('#4: var x = [0,1,2,3,4]; var arr = x.slice(2,4); arr[1] === 3. Actual: ' + (arr[1]));
+}
+
+if (arr[3] !== undefined) {
+  throw new Test262Error('#5: var x = [0,1,2,3,4]; var arr = x.slice(2,4); arr[3] === undefined. Actual: ' + (arr[3]));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/slice/S15.4.4.10_A1.1_T7.js b/js/src/tests/test262/built-ins/Array/prototype/slice/S15.4.4.10_A1.1_T7.js
new file mode 100644
index 0000000000..608a2d1dfe
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/slice/S15.4.4.10_A1.1_T7.js
@@ -0,0 +1,36 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    If start is positive, use min(start, length).
+    If end is positive, use min(end, length)
+esid: sec-array.prototype.slice
+description: end > length > start > 0
+---*/
+
+var x = [0, 1, 2, 3, 4];
+var arr = x.slice(3, 6);
+
+arr.getClass = Object.prototype.toString;
+if (arr.getClass() !== "[object " + "Array" + "]") {
+  throw new Test262Error('#1: var x = [0,1,2,3,4]; var arr = x.slice(3,6); arr is Array object. Actual: ' + (arr.getClass()));
+}
+
+if (arr.length !== 2) {
+  throw new Test262Error('#2: var x = [0,1,2,3,4]; var arr = x.slice(3,6); arr.length === 2. Actual: ' + (arr.length));
+}
+
+if (arr[0] !== 3) {
+  throw new Test262Error('#3: var x = [0,1,2,3,4]; var arr = x.slice(3,6); arr[0] === 3. Actual: ' + (arr[0]));
+}
+
+if (arr[1] !== 4) {
+  throw new Test262Error('#4: var x = [0,1,2,3,4]; var arr = x.slice(3,6); arr[1] === 4. Actual: ' + (arr[1]));
+}
+
+if (arr[3] !== undefined) {
+  throw new Test262Error('#5: var x = [0,1,2,3,4]; var arr = x.slice(3,6); arr[3] === undefined. Actual: ' + (arr[3]));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/slice/S15.4.4.10_A1.2_T1.js b/js/src/tests/test262/built-ins/Array/prototype/slice/S15.4.4.10_A1.2_T1.js
new file mode 100644
index 0000000000..cf4b16b79d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/slice/S15.4.4.10_A1.2_T1.js
@@ -0,0 +1,32 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    If start is negative, use max(start + length, 0).
+    If end is positive, use min(end, length)
+esid: sec-array.prototype.slice
+description: length > end = abs(start), start < 0
+---*/
+
+var x = [0, 1, 2, 3, 4];
+var arr = x.slice(-3, 3);
+
+arr.getClass = Object.prototype.toString;
+if (arr.getClass() !== "[object " + "Array" + "]") {
+  throw new Test262Error('#1: var x = [0,1,2,3,4]; var arr = x.slice(-3,3); arr is Array object. Actual: ' + (arr.getClass()));
+}
+
+if (arr.length !== 1) {
+  throw new Test262Error('#2: var x = [0,1,2,3,4]; var arr = x.slice(-3,3); arr.length === 1. Actual: ' + (arr.length));
+}
+
+if (arr[0] !== 2) {
+  throw new Test262Error('#3: var x = [0,1,2,3,4]; var arr = x.slice(-3,3); arr[0] === 2. Actual: ' + (arr[0]));
+}
+
+if (arr[1] !== undefined) {
+  throw new Test262Error('#4: var x = [0,1,2,3,4]; var arr = x.slice(-3,3); arr[1] === undefined. Actual: ' + (arr[1]));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/slice/S15.4.4.10_A1.2_T2.js b/js/src/tests/test262/built-ins/Array/prototype/slice/S15.4.4.10_A1.2_T2.js
new file mode 100644
index 0000000000..2c37d6d9b6
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/slice/S15.4.4.10_A1.2_T2.js
@@ -0,0 +1,32 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    If start is negative, use max(start + length, 0).
+    If end is positive, use min(end, length)
+esid: sec-array.prototype.slice
+description: length = end > abs(start), start < 0
+---*/
+
+var x = [0, 1, 2, 3, 4];
+var arr = x.slice(-1, 5);
+
+arr.getClass = Object.prototype.toString;
+if (arr.getClass() !== "[object " + "Array" + "]") {
+  throw new Test262Error('#1: var x = [0,1,2,3,4]; var arr = x.slice(-1,5); arr is Array object. Actual: ' + (arr.getClass()));
+}
+
+if (arr.length !== 1) {
+  throw new Test262Error('#2: var x = [0,1,2,3,4]; var arr = x.slice(-1,5); arr.length === 1. Actual: ' + (arr.length));
+}
+
+if (arr[0] !== 4) {
+  throw new Test262Error('#3: var x = [0,1,2,3,4]; var arr = x.slice(-1,5); arr[0] === 4. Actual: ' + (arr[0]));
+}
+
+if (arr[1] !== undefined) {
+  throw new Test262Error('#4: var x = [0,1,2,3,4]; var arr = x.slice(-1,5); arr[1] === undefined. Actual: ' + (arr[1]));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/slice/S15.4.4.10_A1.2_T3.js b/js/src/tests/test262/built-ins/Array/prototype/slice/S15.4.4.10_A1.2_T3.js
new file mode 100644
index 0000000000..dc5a28a18f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/slice/S15.4.4.10_A1.2_T3.js
@@ -0,0 +1,32 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    If start is negative, use max(start + length, 0).
+    If end is positive, use min(end, length)
+esid: sec-array.prototype.slice
+description: abs(start) = length > end > 0, start < 0
+---*/
+
+var x = [0, 1, 2, 3, 4];
+var arr = x.slice(-5, 1);
+
+arr.getClass = Object.prototype.toString;
+if (arr.getClass() !== "[object " + "Array" + "]") {
+  throw new Test262Error('#1: var x = [0,1,2,3,4]; var arr = x.slice(-5,1); arr is Array object. Actual: ' + (arr.getClass()));
+}
+
+if (arr.length !== 1) {
+  throw new Test262Error('#2: var x = [0,1,2,3,4]; var arr = x.slice(-5,1); arr.length === 1. Actual: ' + (arr.length));
+}
+
+if (arr[0] !== 0) {
+  throw new Test262Error('#3: var x = [0,1,2,3,4]; var arr = x.slice(-5,1); arr[0] === 0. Actual: ' + (arr[0]));
+}
+
+if (arr[1] !== undefined) {
+  throw new Test262Error('#4: var x = [0,1,2,3,4]; var arr = x.slice(-5,1); arr[1] === undefined. Actual: ' + (arr[1]));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/slice/S15.4.4.10_A1.2_T4.js b/js/src/tests/test262/built-ins/Array/prototype/slice/S15.4.4.10_A1.2_T4.js
new file mode 100644
index 0000000000..3cabccfb46
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/slice/S15.4.4.10_A1.2_T4.js
@@ -0,0 +1,48 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    If start is negative, use max(start + length, 0).
+    If end is positive, use min(end, length)
+esid: sec-array.prototype.slice
+description: abs(start) > length = end > 0, start < 0
+---*/
+
+var x = [0, 1, 2, 3, 4];
+var arr = x.slice(-9, 5);
+
+arr.getClass = Object.prototype.toString;
+if (arr.getClass() !== "[object " + "Array" + "]") {
+  throw new Test262Error('#1: var x = [0,1,2,3,4]; var arr = x.slice(-9,5); arr is Array object. Actual: ' + (arr.getClass()));
+}
+
+if (arr.length !== 5) {
+  throw new Test262Error('#2: var x = [0,1,2,3,4]; var arr = x.slice(-9,5); arr.length === 5. Actual: ' + (arr.length));
+}
+
+if (arr[0] !== 0) {
+  throw new Test262Error('#3: var x = [0,1,2,3,4]; var arr = x.slice(-9,5); arr[0] === 0. Actual: ' + (arr[0]));
+}
+
+if (arr[1] !== 1) {
+  throw new Test262Error('#4: var x = [0,1,2,3,4]; var arr = x.slice(-9,5); arr[1] === 1. Actual: ' + (arr[1]));
+}
+
+if (arr[2] !== 2) {
+  throw new Test262Error('#5: var x = [0,1,2,3,4]; var arr = x.slice(-9,5); arr[2] === 2. Actual: ' + (arr[2]));
+}
+
+if (arr[3] !== 3) {
+  throw new Test262Error('#6: var x = [0,1,2,3,4]; var arr = x.slice(-9,5); arr[3] === 3. Actual: ' + (arr[3]));
+}
+
+if (arr[4] !== 4) {
+  throw new Test262Error('#7: var x = [0,1,2,3,4]; var arr = x.slice(-9,5); arr[4] === 4. Actual: ' + (arr[4]));
+}
+
+if (arr[5] !== undefined) {
+  throw new Test262Error('#8: var x = [0,1,2,3,4]; var arr = x.slice(-9,5); arr[5] === undefined. Actual: ' + (arr[5]));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/slice/S15.4.4.10_A1.3_T1.js b/js/src/tests/test262/built-ins/Array/prototype/slice/S15.4.4.10_A1.3_T1.js
new file mode 100644
index 0000000000..8ba48c3fbf
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/slice/S15.4.4.10_A1.3_T1.js
@@ -0,0 +1,40 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    If start is positive, use min(start, length).
+    If end is negative, use max(end + length, 0)
+esid: sec-array.prototype.slice
+description: length > abs(end) > start = 0, end < 0
+---*/
+
+var x = [0, 1, 2, 3, 4];
+var arr = x.slice(0, -2);
+
+arr.getClass = Object.prototype.toString;
+if (arr.getClass() !== "[object " + "Array" + "]") {
+  throw new Test262Error('#1: var x = [0,1,2,3,4]; var arr = x.slice(0,-2); arr is Array object. Actual: ' + (arr.getClass()));
+}
+
+if (arr.length !== 3) {
+  throw new Test262Error('#2: var x = [0,1,2,3,4]; var arr = x.slice(0,-2); arr.length === 3. Actual: ' + (arr.length));
+}
+
+if (arr[0] !== 0) {
+  throw new Test262Error('#3: var x = [0,1,2,3,4]; var arr = x.slice(0,-2); arr[0] === 0. Actual: ' + (arr[0]));
+}
+
+if (arr[1] !== 1) {
+  throw new Test262Error('#4: var x = [0,1,2,3,4]; var arr = x.slice(0,-2); arr[1] === 1. Actual: ' + (arr[1]));
+}
+
+if (arr[2] !== 2) {
+  throw new Test262Error('#5: var x = [0,1,2,3,4]; var arr = x.slice(0,-2); arr[2] === 2. Actual: ' + (arr[2]));
+}
+
+if (arr[3] !== undefined) {
+  throw new Test262Error('#6: var x = [0,1,2,3,4]; var arr = x.slice(0,-2); arr[3] === undefined. Actual: ' + (arr[3]));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/slice/S15.4.4.10_A1.3_T2.js b/js/src/tests/test262/built-ins/Array/prototype/slice/S15.4.4.10_A1.3_T2.js
new file mode 100644
index 0000000000..d9cd34fae4
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/slice/S15.4.4.10_A1.3_T2.js
@@ -0,0 +1,28 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    If start is positive, use min(start, length).
+    If end is negative, use max(end + length, 0)
+esid: sec-array.prototype.slice
+description: length > abs(end) > start > 0, end < 0
+---*/
+
+var x = [0, 1, 2, 3, 4];
+var arr = x.slice(1, -4);
+
+arr.getClass = Object.prototype.toString;
+if (arr.getClass() !== "[object " + "Array" + "]") {
+  throw new Test262Error('#1: var x = [0,1,2,3,4]; var arr = x.slice(1,-4); arr is Array object. Actual: ' + (arr.getClass()));
+}
+
+if (arr.length !== 0) {
+  throw new Test262Error('#2: var x = [0,1,2,3,4]; var arr = x.slice(1,-4); arr.length === 0. Actual: ' + (arr.length));
+}
+
+if (arr[0] !== undefined) {
+  throw new Test262Error('#3: var x = [0,1,2,3,4]; var arr = x.slice(1,-4); arr[0] === undefined. Actual: ' + (arr[0]));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/slice/S15.4.4.10_A1.3_T3.js b/js/src/tests/test262/built-ins/Array/prototype/slice/S15.4.4.10_A1.3_T3.js
new file mode 100644
index 0000000000..cee2aa722a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/slice/S15.4.4.10_A1.3_T3.js
@@ -0,0 +1,28 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    If start is positive, use min(start, length).
+    If end is negative, use max(end + length, 0)
+esid: sec-array.prototype.slice
+description: length = abs(end) > start = 0, end < 0
+---*/
+
+var x = [0, 1, 2, 3, 4];
+var arr = x.slice(0, -5);
+
+arr.getClass = Object.prototype.toString;
+if (arr.getClass() !== "[object " + "Array" + "]") {
+  throw new Test262Error('#1: var x = [0,1,2,3,4]; var arr = x.slice(0,-5); arr is Array object. Actual: ' + (arr.getClass()));
+}
+
+if (arr.length !== 0) {
+  throw new Test262Error('#2: var x = [0,1,2,3,4]; var arr = x.slice(0,-5); arr.length === 0. Actual: ' + (arr.length));
+}
+
+if (arr[0] !== undefined) {
+  throw new Test262Error('#3: var x = [0,1,2,3,4]; var arr = x.slice(0,-5); arr[0] === undefined. Actual: ' + (arr[0]));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/slice/S15.4.4.10_A1.3_T4.js b/js/src/tests/test262/built-ins/Array/prototype/slice/S15.4.4.10_A1.3_T4.js
new file mode 100644
index 0000000000..b8e5c2de02
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/slice/S15.4.4.10_A1.3_T4.js
@@ -0,0 +1,28 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    If start is positive, use min(start, length).
+    If end is negative, use max(end + length, 0)
+esid: sec-array.prototype.slice
+description: abs(end) > length > start > 0, end < 0
+---*/
+
+var x = [0, 1, 2, 3, 4];
+var arr = x.slice(4, -9);
+
+arr.getClass = Object.prototype.toString;
+if (arr.getClass() !== "[object " + "Array" + "]") {
+  throw new Test262Error('#1: var x = [0,1,2,3,4]; var arr = x.slice(4,-9); arr is Array object. Actual: ' + (arr.getClass()));
+}
+
+if (arr.length !== 0) {
+  throw new Test262Error('#2: var x = [0,1,2,3,4]; var arr = x.slice(4,-9); arr.length === 0. Actual: ' + (arr.length));
+}
+
+if (arr[0] !== undefined) {
+  throw new Test262Error('#3: var x = [0,1,2,3,4]; var arr = x.slice(4,-9); arr[0] === undefined. Actual: ' + (arr[0]));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/slice/S15.4.4.10_A1.4_T1.js b/js/src/tests/test262/built-ins/Array/prototype/slice/S15.4.4.10_A1.4_T1.js
new file mode 100644
index 0000000000..4d3497d8c3
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/slice/S15.4.4.10_A1.4_T1.js
@@ -0,0 +1,40 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    If start is negative, use max(start + length, 0).
+    If end is negative, use max(end + length, 0)
+esid: sec-array.prototype.slice
+description: -length = start < end < 0
+---*/
+
+var x = [0, 1, 2, 3, 4];
+var arr = x.slice(-5, -2);
+
+arr.getClass = Object.prototype.toString;
+if (arr.getClass() !== "[object " + "Array" + "]") {
+  throw new Test262Error('#1: var x = [0,1,2,3,4]; var arr = x.slice(-5,-2); arr is Array object. Actual: ' + (arr.getClass()));
+}
+
+if (arr.length !== 3) {
+  throw new Test262Error('#2: var x = [0,1,2,3,4]; var arr = x.slice(-5,-2); arr.length === 3. Actual: ' + (arr.length));
+}
+
+if (arr[0] !== 0) {
+  throw new Test262Error('#3: var x = [0,1,2,3,4]; var arr = x.slice(-5,-2); arr[0] === 0. Actual: ' + (arr[0]));
+}
+
+if (arr[1] !== 1) {
+  throw new Test262Error('#4: var x = [0,1,2,3,4]; var arr = x.slice(-5,-2); arr[1] === 1. Actual: ' + (arr[1]));
+}
+
+if (arr[2] !== 2) {
+  throw new Test262Error('#5: var x = [0,1,2,3,4]; var arr = x.slice(-5,-2); arr[2] === 2. Actual: ' + (arr[2]));
+}
+
+if (arr[3] !== undefined) {
+  throw new Test262Error('#6: var x = [0,1,2,3,4]; var arr = x.slice(-5,-2); arr[3] === undefined. Actual: ' + (arr[3]));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/slice/S15.4.4.10_A1.4_T2.js b/js/src/tests/test262/built-ins/Array/prototype/slice/S15.4.4.10_A1.4_T2.js
new file mode 100644
index 0000000000..dc5edeb65b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/slice/S15.4.4.10_A1.4_T2.js
@@ -0,0 +1,36 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    If start is negative, use max(start + length, 0).
+    If end is negative, use max(end + length, 0)
+esid: sec-array.prototype.slice
+description: -length < start < end < 0
+---*/
+
+var x = [0, 1, 2, 3, 4];
+var arr = x.slice(-3, -1);
+
+arr.getClass = Object.prototype.toString;
+if (arr.getClass() !== "[object " + "Array" + "]") {
+  throw new Test262Error('#1: var x = [0,1,2,3,4]; var arr = x.slice(-3,-1); arr is Array object. Actual: ' + (arr.getClass()));
+}
+
+if (arr.length !== 2) {
+  throw new Test262Error('#2: var x = [0,1,2,3,4]; var arr = x.slice(-3,-1); arr.length === 2. Actual: ' + (arr.length));
+}
+
+if (arr[0] !== 2) {
+  throw new Test262Error('#3: var x = [0,1,2,3,4]; var arr = x.slice(-3,-1); arr[0] === 2. Actual: ' + (arr[0]));
+}
+
+if (arr[1] !== 3) {
+  throw new Test262Error('#4: var x = [0,1,2,3,4]; var arr = x.slice(-3,-1); arr[1] === 3. Actual: ' + (arr[1]));
+}
+
+if (arr[2] !== undefined) {
+  throw new Test262Error('#5: var x = [0,1,2,3,4]; var arr = x.slice(-3,-1); arr[2] === undefined. Actual: ' + (arr[2]));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/slice/S15.4.4.10_A1.4_T3.js b/js/src/tests/test262/built-ins/Array/prototype/slice/S15.4.4.10_A1.4_T3.js
new file mode 100644
index 0000000000..2ad1794dc5
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/slice/S15.4.4.10_A1.4_T3.js
@@ -0,0 +1,44 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    If start is negative, use max(start + length, 0).
+    If end is negative, use max(end + length, 0)
+esid: sec-array.prototype.slice
+description: start < -length < end < 0
+---*/
+
+var x = [0, 1, 2, 3, 4];
+var arr = x.slice(-9, -1);
+
+arr.getClass = Object.prototype.toString;
+if (arr.getClass() !== "[object " + "Array" + "]") {
+  throw new Test262Error('#1: var x = [0,1,2,3,4]; var arr = x.slice(-9,-1); arr is Array object. Actual: ' + (arr.getClass()));
+}
+
+if (arr.length !== 4) {
+  throw new Test262Error('#2: var x = [0,1,2,3,4]; var arr = x.slice(-9,-1); arr.length === 4. Actual: ' + (arr.length));
+}
+
+if (arr[0] !== 0) {
+  throw new Test262Error('#3: var x = [0,1,2,3,4]; var arr = x.slice(-9,-1); arr[0] === 0. Actual: ' + (arr[0]));
+}
+
+if (arr[1] !== 1) {
+  throw new Test262Error('#4: var x = [0,1,2,3,4]; var arr = x.slice(-9,-1); arr[1] === 1. Actual: ' + (arr[1]));
+}
+
+if (arr[2] !== 2) {
+  throw new Test262Error('#5: var x = [0,1,2,3,4]; var arr = x.slice(-9,-1); arr[2] === 2. Actual: ' + (arr[2]));
+}
+
+if (arr[3] !== 3) {
+  throw new Test262Error('#6: var x = [0,1,2,3,4]; var arr = x.slice(-9,-1); arr[3] === 3. Actual: ' + (arr[3]));
+}
+
+if (arr[4] !== undefined) {
+  throw new Test262Error('#7: var x = [0,1,2,3,4]; var arr = x.slice(-9,-1); arr[4] === undefined. Actual: ' + (arr[4]));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/slice/S15.4.4.10_A1.4_T4.js b/js/src/tests/test262/built-ins/Array/prototype/slice/S15.4.4.10_A1.4_T4.js
new file mode 100644
index 0000000000..559654a7a6
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/slice/S15.4.4.10_A1.4_T4.js
@@ -0,0 +1,28 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    If start is negative, use max(start + length, 0).
+    If end is negative, use max(end + length, 0)
+esid: sec-array.prototype.slice
+description: start = end < -length
+---*/
+
+var x = [0, 1, 2, 3, 4];
+var arr = x.slice(-6, -6);
+
+arr.getClass = Object.prototype.toString;
+if (arr.getClass() !== "[object " + "Array" + "]") {
+  throw new Test262Error('#1: var x = [0,1,2,3,4]; var arr = x.slice(-6,-6); arr is Array object. Actual: ' + (arr.getClass()));
+}
+
+if (arr.length !== 0) {
+  throw new Test262Error('#2: var x = [0,1,2,3,4]; var arr = x.slice(-6,-6); arr.length === 0. Actual: ' + (arr.length));
+}
+
+if (arr[0] !== undefined) {
+  throw new Test262Error('#3: var x = [0,1,2,3,4]; var arr = x.slice(-6,-6); arr[0] === undefined. Actual: ' + (arr[0]));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/slice/S15.4.4.10_A1.5_T1.js b/js/src/tests/test262/built-ins/Array/prototype/slice/S15.4.4.10_A1.5_T1.js
new file mode 100644
index 0000000000..8003dd6aa0
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/slice/S15.4.4.10_A1.5_T1.js
@@ -0,0 +1,34 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: If end is undefined use length
+esid: sec-array.prototype.slice
+description: end === undefined
+---*/
+
+var x = [0, 1, 2, 3, 4];
+var arr = x.slice(3, undefined);
+
+arr.getClass = Object.prototype.toString;
+if (arr.getClass() !== "[object " + "Array" + "]") {
+  throw new Test262Error('#1: var x = [0,1,2,3,4]; var arr = x.slice(3, undefined); arr is Array object. Actual: ' + (arr.getClass()));
+}
+
+if (arr.length !== 2) {
+  throw new Test262Error('#2: var x = [0,1,2,3,4]; var arr = x.slice(3, undefined); arr.length === 2. Actual: ' + (arr.length));
+}
+
+if (arr[0] !== 3) {
+  throw new Test262Error('#3: var x = [0,1,2,3,4]; var arr = x.slice(3, undefined); arr[0] === 3. Actual: ' + (arr[0]));
+}
+
+if (arr[1] !== 4) {
+  throw new Test262Error('#4: var x = [0,1,2,3,4]; var arr = x.slice(3, undefined); arr[1] === 4. Actual: ' + (arr[1]));
+}
+
+if (arr[2] !== undefined) {
+  throw new Test262Error('#5: var x = [0,1,2,3,4]; var arr = x.slice(3, undefined); arr[2] === undefined. Actual: ' + (arr[2]));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/slice/S15.4.4.10_A1.5_T2.js b/js/src/tests/test262/built-ins/Array/prototype/slice/S15.4.4.10_A1.5_T2.js
new file mode 100644
index 0000000000..38fdc5e779
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/slice/S15.4.4.10_A1.5_T2.js
@@ -0,0 +1,34 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: If end is undefined use length
+esid: sec-array.prototype.slice
+description: end is absent
+---*/
+
+var x = [0, 1, 2, 3, 4];
+var arr = x.slice(-2);
+
+arr.getClass = Object.prototype.toString;
+if (arr.getClass() !== "[object " + "Array" + "]") {
+  throw new Test262Error('#1: var x = [0,1,2,3,4]; var arr = x.slice(-2); arr is Array object. Actual: ' + (arr.getClass()));
+}
+
+if (arr.length !== 2) {
+  throw new Test262Error('#2: var x = [0,1,2,3,4]; var arr = x.slice(-2); arr.length === 2. Actual: ' + (arr.length));
+}
+
+if (arr[0] !== 3) {
+  throw new Test262Error('#3: var x = [0,1,2,3,4]; var arr = x.slice(-2); arr[0] === 3. Actual: ' + (arr[0]));
+}
+
+if (arr[1] !== 4) {
+  throw new Test262Error('#4: var x = [0,1,2,3,4]; var arr = x.slice(-2); arr[1] === 4. Actual: ' + (arr[1]));
+}
+
+if (arr[2] !== undefined) {
+  throw new Test262Error('#5: var x = [0,1,2,3,4]; var arr = x.slice(-2); arr[2] === undefined. Actual: ' + (arr[2]));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/slice/S15.4.4.10_A2.1_T1.js b/js/src/tests/test262/built-ins/Array/prototype/slice/S15.4.4.10_A2.1_T1.js
new file mode 100644
index 0000000000..58e07e8b49
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/slice/S15.4.4.10_A2.1_T1.js
@@ -0,0 +1,34 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: Operator use ToInteger from start
+esid: sec-array.prototype.slice
+description: start is not integer
+---*/
+
+var x = [0, 1, 2, 3, 4];
+var arr = x.slice(2.5, 4);
+
+arr.getClass = Object.prototype.toString;
+if (arr.getClass() !== "[object " + "Array" + "]") {
+  throw new Test262Error('#1: var x = [0,1,2,3,4]; var arr = x.slice(2.5,4); arr is Array object. Actual: ' + (arr.getClass()));
+}
+
+if (arr.length !== 2) {
+  throw new Test262Error('#2: var x = [0,1,2,3,4]; var arr = x.slice(2.5,4); arr.length === 2. Actual: ' + (arr.length));
+}
+
+if (arr[0] !== 2) {
+  throw new Test262Error('#3: var x = [0,1,2,3,4]; var arr = x.slice(2.5,4); arr[0] === 2. Actual: ' + (arr[0]));
+}
+
+if (arr[1] !== 3) {
+  throw new Test262Error('#4: var x = [0,1,2,3,4]; var arr = x.slice(2.5,4); arr[1] === 3. Actual: ' + (arr[1]));
+}
+
+if (arr[3] !== undefined) {
+  throw new Test262Error('#5: var x = [0,1,2,3,4]; var arr = x.slice(2.5,4); arr[3] === undefined. Actual: ' + (arr[3]));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/slice/S15.4.4.10_A2.1_T2.js b/js/src/tests/test262/built-ins/Array/prototype/slice/S15.4.4.10_A2.1_T2.js
new file mode 100644
index 0000000000..61501fa6a9
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/slice/S15.4.4.10_A2.1_T2.js
@@ -0,0 +1,38 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: Operator use ToInteger from start
+esid: sec-array.prototype.slice
+description: start = NaN
+---*/
+
+var x = [0, 1, 2, 3, 4];
+var arr = x.slice(NaN, 3);
+
+arr.getClass = Object.prototype.toString;
+if (arr.getClass() !== "[object " + "Array" + "]") {
+  throw new Test262Error('#1: var x = [0,1,2,3,4]; var arr = x.slice(NaN,3); arr is Array object. Actual: ' + (arr.getClass()));
+}
+
+if (arr.length !== 3) {
+  throw new Test262Error('#2: var x = [0,1,2,3,4]; var arr = x.slice(NaN,3); arr.length === 3. Actual: ' + (arr.length));
+}
+
+if (arr[0] !== 0) {
+  throw new Test262Error('#3: var x = [0,1,2,3,4]; var arr = x.slice(NaN,3); arr[0] === 0. Actual: ' + (arr[0]));
+}
+
+if (arr[1] !== 1) {
+  throw new Test262Error('#4: var x = [0,1,2,3,4]; var arr = x.slice(NaN,3); arr[1] === 1. Actual: ' + (arr[1]));
+}
+
+if (arr[2] !== 2) {
+  throw new Test262Error('#5: var x = [0,1,2,3,4]; var arr = x.slice(NaN,3); arr[2] === 2. Actual: ' + (arr[2]));
+}
+
+if (arr[3] !== undefined) {
+  throw new Test262Error('#6: var x = [0,1,2,3,4]; var arr = x.slice(NaN,3); arr[3] === undefined. Actual: ' + (arr[3]));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/slice/S15.4.4.10_A2.1_T3.js b/js/src/tests/test262/built-ins/Array/prototype/slice/S15.4.4.10_A2.1_T3.js
new file mode 100644
index 0000000000..184c6a3d50
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/slice/S15.4.4.10_A2.1_T3.js
@@ -0,0 +1,26 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: Operator use ToInteger from start
+esid: sec-array.prototype.slice
+description: start = Infinity
+---*/
+
+var x = [0, 1, 2, 3, 4];
+var arr = x.slice(Number.POSITIVE_INFINITY, 3);
+
+arr.getClass = Object.prototype.toString;
+if (arr.getClass() !== "[object " + "Array" + "]") {
+  throw new Test262Error('#1: var x = [0,1,2,3,4]; var arr = x.slice(Number.POSITIVE_INFINITY,3); arr is Array object. Actual: ' + (arr.getClass()));
+}
+
+if (arr.length !== 0) {
+  throw new Test262Error('#2: var x = [0,1,2,3,4]; var arr = x.slice(Number.POSITIVE_INFINITY,3); arr.length === 0. Actual: ' + (arr.length));
+}
+
+if (arr[0] !== undefined) {
+  throw new Test262Error('#3: var x = [0,1,2,3,4]; var arr = x.slice(Number.POSITIVE_INFINITY,3); arr[0] === undefined. Actual: ' + (arr[0]));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/slice/S15.4.4.10_A2.1_T4.js b/js/src/tests/test262/built-ins/Array/prototype/slice/S15.4.4.10_A2.1_T4.js
new file mode 100644
index 0000000000..c68293a53f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/slice/S15.4.4.10_A2.1_T4.js
@@ -0,0 +1,38 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: Operator use ToInteger from start
+esid: sec-array.prototype.slice
+description: start = -Infinity
+---*/
+
+var x = [0, 1, 2, 3, 4];
+var arr = x.slice(Number.NEGATIVE_INFINITY, 3);
+
+arr.getClass = Object.prototype.toString;
+if (arr.getClass() !== "[object " + "Array" + "]") {
+  throw new Test262Error('#1: var x = [0,1,2,3,4]; var arr = x.slice(Number.NEGATIVE_INFINITY,3); arr is Array object. Actual: ' + (arr.getClass()));
+}
+
+if (arr.length !== 3) {
+  throw new Test262Error('#2: var x = [0,1,2,3,4]; var arr = x.slice(Number.NEGATIVE_INFINITY,3); arr.length === 3. Actual: ' + (arr.length));
+}
+
+if (arr[0] !== 0) {
+  throw new Test262Error('#3: var x = [0,1,2,3,4]; var arr = x.slice(Number.NEGATIVE_INFINITY,3); arr[0] === 0. Actual: ' + (arr[0]));
+}
+
+if (arr[1] !== 1) {
+  throw new Test262Error('#4: var x = [0,1,2,3,4]; var arr = x.slice(Number.NEGATIVE_INFINITY,3); arr[1] === 1. Actual: ' + (arr[1]));
+}
+
+if (arr[2] !== 2) {
+  throw new Test262Error('#5: var x = [0,1,2,3,4]; var arr = x.slice(Number.NEGATIVE_INFINITY,3); arr[2] === 2. Actual: ' + (arr[2]));
+}
+
+if (arr[3] !== undefined) {
+  throw new Test262Error('#6: var x = [0,1,2,3,4]; var arr = x.slice(Number.NEGATIVE_INFINITY,3); arr[3] === undefined. Actual: ' + (arr[3]));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/slice/S15.4.4.10_A2.1_T5.js b/js/src/tests/test262/built-ins/Array/prototype/slice/S15.4.4.10_A2.1_T5.js
new file mode 100644
index 0000000000..5516c0de6d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/slice/S15.4.4.10_A2.1_T5.js
@@ -0,0 +1,45 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: Operator use ToInteger from start
+esid: sec-array.prototype.slice
+description: ToInteger use ToNumber
+---*/
+
+var x = [0, 1, 2, 3, 4];
+var arr = x.slice({
+  valueOf: function() {
+    return 0
+  },
+  toString: function() {
+    return 3
+  }
+}, 3);
+
+arr.getClass = Object.prototype.toString;
+if (arr.getClass() !== "[object " + "Array" + "]") {
+  throw new Test262Error('#1: var x = [0,1,2,3,4]; var arr = x.slice({valueOf: function() {return 0}, toString: function() {return 3}},3); arr is Array object. Actual: ' + (arr.getClass()));
+}
+
+if (arr.length !== 3) {
+  throw new Test262Error('#2: var x = [0,1,2,3,4]; var arr = x.slice({valueOf: function() {return 0}, toString: function() {return 3}},3); arr.length === 3. Actual: ' + (arr.length));
+}
+
+if (arr[0] !== 0) {
+  throw new Test262Error('#3: var x = [0,1,2,3,4]; var arr = x.slice({valueOf: function() {return 0}, toString: function() {return 3}},3); arr[0] === 0. Actual: ' + (arr[0]));
+}
+
+if (arr[1] !== 1) {
+  throw new Test262Error('#4: var x = [0,1,2,3,4]; var arr = x.slice({valueOf: function() {return 0}, toString: function() {return 3}},3); arr[1] === 1. Actual: ' + (arr[1]));
+}
+
+if (arr[2] !== 2) {
+  throw new Test262Error('#5: var x = [0,1,2,3,4]; var arr = x.slice({valueOf: function() {return 0}, toString: function() {return 3}},3); arr[2] === 2. Actual: ' + (arr[2]));
+}
+
+if (arr[3] !== undefined) {
+  throw new Test262Error('#6: var x = [0,1,2,3,4]; var arr = x.slice({valueOf: function() {return 0}, toString: function() {return 3}},3); arr[3] === undefined. Actual: ' + (arr[3]));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/slice/S15.4.4.10_A2.2_T1.js b/js/src/tests/test262/built-ins/Array/prototype/slice/S15.4.4.10_A2.2_T1.js
new file mode 100644
index 0000000000..3ce7f0e68b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/slice/S15.4.4.10_A2.2_T1.js
@@ -0,0 +1,34 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: Operator use ToInteger from end
+esid: sec-array.prototype.slice
+description: end is not integer
+---*/
+
+var x = [0, 1, 2, 3, 4];
+var arr = x.slice(2, 4.5);
+
+arr.getClass = Object.prototype.toString;
+if (arr.getClass() !== "[object " + "Array" + "]") {
+  throw new Test262Error('#1: var x = [0,1,2,3,4]; var arr = x.slice(2,4.5); arr is Array object. Actual: ' + (arr.getClass()));
+}
+
+if (arr.length !== 2) {
+  throw new Test262Error('#2: var x = [0,1,2,3,4]; var arr = x.slice(2,4.5); arr.length === 2. Actual: ' + (arr.length));
+}
+
+if (arr[0] !== 2) {
+  throw new Test262Error('#3: var x = [0,1,2,3,4]; var arr = x.slice(2,4.5); arr[0] === 2. Actual: ' + (arr[0]));
+}
+
+if (arr[1] !== 3) {
+  throw new Test262Error('#4: var x = [0,1,2,3,4]; var arr = x.slice(2,4.5); arr[1] === 3. Actual: ' + (arr[1]));
+}
+
+if (arr[3] !== undefined) {
+  throw new Test262Error('#5: var x = [0,1,2,3,4]; var arr = x.slice(2,4.5); arr[3] === undefined. Actual: ' + (arr[3]));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/slice/S15.4.4.10_A2.2_T2.js b/js/src/tests/test262/built-ins/Array/prototype/slice/S15.4.4.10_A2.2_T2.js
new file mode 100644
index 0000000000..a875da047b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/slice/S15.4.4.10_A2.2_T2.js
@@ -0,0 +1,26 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: Operator use ToInteger from end
+esid: sec-array.prototype.slice
+description: end = NaN
+---*/
+
+var x = [0, 1, 2, 3, 4];
+var arr = x.slice(0, NaN);
+
+arr.getClass = Object.prototype.toString;
+if (arr.getClass() !== "[object " + "Array" + "]") {
+  throw new Test262Error('#1: var x = [0,1,2,3,4]; var arr = x.slice(0,NaN); arr is Array object. Actual: ' + (arr.getClass()));
+}
+
+if (arr.length !== 0) {
+  throw new Test262Error('#2: var x = [0,1,2,3,4]; var arr = x.slice(0,NaN); arr.length === 0. Actual: ' + (arr.length));
+}
+
+if (arr[0] !== undefined) {
+  throw new Test262Error('#3: var x = [0,1,2,3,4]; var arr = x.slice(0,NaN); arr[0] === undefined. Actual: ' + (arr[0]));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/slice/S15.4.4.10_A2.2_T3.js b/js/src/tests/test262/built-ins/Array/prototype/slice/S15.4.4.10_A2.2_T3.js
new file mode 100644
index 0000000000..3cad37ddbe
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/slice/S15.4.4.10_A2.2_T3.js
@@ -0,0 +1,46 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: Operator use ToInteger from end
+esid: sec-array.prototype.slice
+description: end = Infinity
+---*/
+
+var x = [0, 1, 2, 3, 4];
+var arr = x.slice(0, Number.POSITIVE_INFINITY);
+
+arr.getClass = Object.prototype.toString;
+if (arr.getClass() !== "[object " + "Array" + "]") {
+  throw new Test262Error('#1: var x = [0,1,2,3,4]; var arr = x.slice(0,Number.POSITIVE_INFINITY); arr is Array object. Actual: ' + (arr.getClass()));
+}
+
+if (arr.length !== 5) {
+  throw new Test262Error('#2: var x = [0,1,2,3,4]; var arr = x.slice(0,Number.POSITIVE_INFINITY); arr.length === 5. Actual: ' + (arr.length));
+}
+
+if (arr[0] !== 0) {
+  throw new Test262Error('#3: var x = [0,1,2,3,4]; var arr = x.slice(0,Number.POSITIVE_INFINITY); arr[0] === 0. Actual: ' + (arr[0]));
+}
+
+if (arr[1] !== 1) {
+  throw new Test262Error('#4: var x = [0,1,2,3,4]; var arr = x.slice(0,Number.POSITIVE_INFINITY); arr[1] === 1. Actual: ' + (arr[1]));
+}
+
+if (arr[2] !== 2) {
+  throw new Test262Error('#5: var x = [0,1,2,3,4]; var arr = x.slice(0,Number.POSITIVE_INFINITY); arr[2] === 2. Actual: ' + (arr[2]));
+}
+
+if (arr[3] !== 3) {
+  throw new Test262Error('#6: var x = [0,1,2,3,4]; var arr = x.slice(0,Number.POSITIVE_INFINITY); arr[3] === 3. Actual: ' + (arr[3]));
+}
+
+if (arr[4] !== 4) {
+  throw new Test262Error('#7: var x = [0,1,2,3,4]; var arr = x.slice(0,Number.POSITIVE_INFINITY); arr[4] === 4. Actual: ' + (arr[4]));
+}
+
+if (arr[5] !== undefined) {
+  throw new Test262Error('#8: var x = [0,1,2,3,4]; var arr = x.slice(0,Number.POSITIVE_INFINITY); arr[5] === undefined. Actual: ' + (arr[5]));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/slice/S15.4.4.10_A2.2_T4.js b/js/src/tests/test262/built-ins/Array/prototype/slice/S15.4.4.10_A2.2_T4.js
new file mode 100644
index 0000000000..14a9bbe26b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/slice/S15.4.4.10_A2.2_T4.js
@@ -0,0 +1,26 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: Operator use ToInteger from end
+esid: sec-array.prototype.slice
+description: end = -Infinity
+---*/
+
+var x = [0, 1, 2, 3, 4];
+var arr = x.slice(0, Number.NEGATIVE_INFINITY);
+
+arr.getClass = Object.prototype.toString;
+if (arr.getClass() !== "[object " + "Array" + "]") {
+  throw new Test262Error('#1: var x = [0,1,2,3,4]; var arr = x.slice(0,Number.NEGATIVE_INFINITY); arr is Array object. Actual: ' + (arr.getClass()));
+}
+
+if (arr.length !== 0) {
+  throw new Test262Error('#2: var x = [0,1,2,3,4]; var arr = x.slice(0,Number.NEGATIVE_INFINITY); arr.length === 0. Actual: ' + (arr.length));
+}
+
+if (arr[0] !== undefined) {
+  throw new Test262Error('#3: var x = [0,1,2,3,4]; var arr = x.slice(0,Number.NEGATIVE_INFINITY); arr[0] === undefined. Actual: ' + (arr[0]));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/slice/S15.4.4.10_A2.2_T5.js b/js/src/tests/test262/built-ins/Array/prototype/slice/S15.4.4.10_A2.2_T5.js
new file mode 100644
index 0000000000..a5d20c21c3
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/slice/S15.4.4.10_A2.2_T5.js
@@ -0,0 +1,45 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: Operator use ToInteger from end
+esid: sec-array.prototype.slice
+description: ToInteger use ToNumber
+---*/
+
+var x = [0, 1, 2, 3, 4];
+var arr = x.slice(0, {
+  valueOf: function() {
+    return 3
+  },
+  toString: function() {
+    return 0
+  }
+});
+
+arr.getClass = Object.prototype.toString;
+if (arr.getClass() !== "[object " + "Array" + "]") {
+  throw new Test262Error('#1: var x = [0,1,2,3,4]; var arr = x.slice(0,{valueOf: function() {return 3}, toString: function() {return 0}}); arr is Array object. Actual: ' + (arr.getClass()));
+}
+
+if (arr.length !== 3) {
+  throw new Test262Error('#2: var x = [0,1,2,3,4]; var arr = x.slice(0,{valueOf: function() {return 3}, toString: function() {return 0}}); arr.length === 3. Actual: ' + (arr.length));
+}
+
+if (arr[0] !== 0) {
+  throw new Test262Error('#3: var x = [0,1,2,3,4]; var arr = x.slice(0,{valueOf: function() {return 3}, toString: function() {return 0}}); arr[0] === 0. Actual: ' + (arr[0]));
+}
+
+if (arr[1] !== 1) {
+  throw new Test262Error('#4: var x = [0,1,2,3,4]; var arr = x.slice(0,{valueOf: function() {return 3}, toString: function() {return 0}}); arr[1] === 1. Actual: ' + (arr[1]));
+}
+
+if (arr[2] !== 2) {
+  throw new Test262Error('#5: var x = [0,1,2,3,4]; var arr = x.slice(0,{valueOf: function() {return 3}, toString: function() {return 0}}); arr[2] === 2. Actual: ' + (arr[2]));
+}
+
+if (arr[3] !== undefined) {
+  throw new Test262Error('#6: var x = [0,1,2,3,4]; var arr = x.slice(0,{valueOf: function() {return 3}, toString: function() {return 0}}); arr[3] === undefined. Actual: ' + (arr[3]));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/slice/S15.4.4.10_A2_T1.js b/js/src/tests/test262/built-ins/Array/prototype/slice/S15.4.4.10_A2_T1.js
new file mode 100644
index 0000000000..2eedb258f9
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/slice/S15.4.4.10_A2_T1.js
@@ -0,0 +1,49 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    The slice function is intentionally generic.
+    It does not require that its this value be an Array object
+esid: sec-array.prototype.slice
+description: >
+    If start is positive, use min(start, length).  If end is positive,
+    use min(end, length)
+---*/
+
+var obj = {};
+obj.slice = Array.prototype.slice;
+obj[0] = 0;
+obj[1] = 1;
+obj[2] = 2;
+obj[3] = 3;
+obj[4] = 4;
+obj.length = 5;
+var arr = obj.slice(0, 3);
+
+arr.getClass = Object.prototype.toString;
+if (arr.getClass() !== "[object " + "Array" + "]") {
+  throw new Test262Error('#1: var obj = {}; obj.slice = Array.prototype.slice; obj[0] = 0; obj[1] = 1; obj[2] = 2; obj[3] = 3; obj[4] = 4; obj.length = 5; var arr = obj.slice(0,3); arr is Array object. Actual: ' + (arr.getClass()));
+}
+
+if (arr.length !== 3) {
+  throw new Test262Error('#2: var obj = {}; obj.slice = Array.prototype.slice; obj[0] = 0; obj[1] = 1; obj[2] = 2; obj[3] = 3; obj[4] = 4; obj.length = 5; var arr = obj.slice(0,3); arr.length === 3. Actual: ' + (arr.length));
+}
+
+if (arr[0] !== 0) {
+  throw new Test262Error('#3: var obj = {}; obj.slice = Array.prototype.slice; obj[0] = 0; obj[1] = 1; obj[2] = 2; obj[3] = 3; obj[4] = 4; obj.length = 5; var arr = obj.slice(0,3); arr[0] === 0. Actual: ' + (arr[0]));
+}
+
+if (arr[1] !== 1) {
+  throw new Test262Error('#4: var obj = {}; obj.slice = Array.prototype.slice; obj[0] = 0; obj[1] = 1; obj[2] = 2; obj[3] = 3; obj[4] = 4; obj.length = 5; var arr = obj.slice(0,3); arr[1] === 1. Actual: ' + (arr[1]));
+}
+
+if (arr[2] !== 2) {
+  throw new Test262Error('#5: var obj = {}; obj.slice = Array.prototype.slice; obj[0] = 0; obj[1] = 1; obj[2] = 2; obj[3] = 3; obj[4] = 4; obj.length = 5; var arr = obj.slice(0,3); arr[2] === 2. Actual: ' + (arr[2]));
+}
+
+if (arr[3] !== undefined) {
+  throw new Test262Error('#6: var obj = {}; obj.slice = Array.prototype.slice; obj[0] = 0; obj[1] = 1; obj[2] = 2; obj[3] = 3; obj[4] = 4; obj.length = 5; var arr = obj.slice(0,3); arr[3] === undefined. Actual: ' + (arr[3]));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/slice/S15.4.4.10_A2_T2.js b/js/src/tests/test262/built-ins/Array/prototype/slice/S15.4.4.10_A2_T2.js
new file mode 100644
index 0000000000..017c5e5bc6
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/slice/S15.4.4.10_A2_T2.js
@@ -0,0 +1,49 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    The slice function is intentionally generic.
+    It does not require that its this value be an Array object
+esid: sec-array.prototype.slice
+description: >
+    If start is negative, use max(start + length, 0).  If end is
+    positive, use min(end, length)
+---*/
+
+var obj = {};
+obj.slice = Array.prototype.slice;
+obj[0] = 0;
+obj[1] = 1;
+obj[2] = 2;
+obj[3] = 3;
+obj[4] = 4;
+obj.length = 5;
+var arr = obj.slice(-5, 3);
+
+arr.getClass = Object.prototype.toString;
+if (arr.getClass() !== "[object " + "Array" + "]") {
+  throw new Test262Error('#1: var obj = {}; obj.slice = Array.prototype.slice; obj[0] = 0; obj[1] = 1; obj[2] = 2; obj[3] = 3; obj[4] = 4; obj.length = 5; var arr = obj.slice(-5,3); arr is Array object. Actual: ' + (arr.getClass()));
+}
+
+if (arr.length !== 3) {
+  throw new Test262Error('#2: var obj = {}; obj.slice = Array.prototype.slice; obj[0] = 0; obj[1] = 1; obj[2] = 2; obj[3] = 3; obj[4] = 4; obj.length = 5; var arr = obj.slice(-5,3); arr.length === 3. Actual: ' + (arr.length));
+}
+
+if (arr[0] !== 0) {
+  throw new Test262Error('#3: var obj = {}; obj.slice = Array.prototype.slice; obj[0] = 0; obj[1] = 1; obj[2] = 2; obj[3] = 3; obj[4] = 4; obj.length = 5; var arr = obj.slice(-5,3); arr[0] === 0. Actual: ' + (arr[0]));
+}
+
+if (arr[1] !== 1) {
+  throw new Test262Error('#4: var obj = {}; obj.slice = Array.prototype.slice; obj[0] = 0; obj[1] = 1; obj[2] = 2; obj[3] = 3; obj[4] = 4; obj.length = 5; var arr = obj.slice(-5,3); arr[1] === 1. Actual: ' + (arr[1]));
+}
+
+if (arr[2] !== 2) {
+  throw new Test262Error('#5: var obj = {}; obj.slice = Array.prototype.slice; obj[0] = 0; obj[1] = 1; obj[2] = 2; obj[3] = 3; obj[4] = 4; obj.length = 5; var arr = obj.slice(-5,3); arr[2] === 2. Actual: ' + (arr[2]));
+}
+
+if (arr[3] !== undefined) {
+  throw new Test262Error('#6: var obj = {}; obj.slice = Array.prototype.slice; obj[0] = 0; obj[1] = 1; obj[2] = 2; obj[3] = 3; obj[4] = 4; obj.length = 5; var arr = obj.slice(-5,3); arr[3] === undefined. Actual: ' + (arr[3]));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/slice/S15.4.4.10_A2_T3.js b/js/src/tests/test262/built-ins/Array/prototype/slice/S15.4.4.10_A2_T3.js
new file mode 100644
index 0000000000..739b23457c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/slice/S15.4.4.10_A2_T3.js
@@ -0,0 +1,49 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    The slice function is intentionally generic.
+    It does not require that its this value be an Array object
+esid: sec-array.prototype.slice
+description: >
+    If start is positive, use min(start, length).  If end is negative,
+    use max(end + length, 0)
+---*/
+
+var obj = {};
+obj.slice = Array.prototype.slice;
+obj[0] = 0;
+obj[1] = 1;
+obj[2] = 2;
+obj[3] = 3;
+obj[4] = 4;
+obj.length = 5;
+var arr = obj.slice(0, -2);
+
+arr.getClass = Object.prototype.toString;
+if (arr.getClass() !== "[object " + "Array" + "]") {
+  throw new Test262Error('#1: var obj = {}; obj.slice = Array.prototype.slice; obj[0] = 0; obj[1] = 1; obj[2] = 2; obj[3] = 3; obj[4] = 4; obj.length = 5; var arr = obj.slice(0,-2); arr is Array object. Actual: ' + (arr.getClass()));
+}
+
+if (arr.length !== 3) {
+  throw new Test262Error('#2: var obj = {}; obj.slice = Array.prototype.slice; obj[0] = 0; obj[1] = 1; obj[2] = 2; obj[3] = 3; obj[4] = 4; obj.length = 5; var arr = obj.slice(0,-2); arr.length === 3. Actual: ' + (arr.length));
+}
+
+if (arr[0] !== 0) {
+  throw new Test262Error('#3: var obj = {}; obj.slice = Array.prototype.slice; obj[0] = 0; obj[1] = 1; obj[2] = 2; obj[3] = 3; obj[4] = 4; obj.length = 5; var arr = obj.slice(0,-2); arr[0] === 0. Actual: ' + (arr[0]));
+}
+
+if (arr[1] !== 1) {
+  throw new Test262Error('#4: var obj = {}; obj.slice = Array.prototype.slice; obj[0] = 0; obj[1] = 1; obj[2] = 2; obj[3] = 3; obj[4] = 4; obj.length = 5; var arr = obj.slice(0,-2); arr[1] === 1. Actual: ' + (arr[1]));
+}
+
+if (arr[2] !== 2) {
+  throw new Test262Error('#5: var obj = {}; obj.slice = Array.prototype.slice; obj[0] = 0; obj[1] = 1; obj[2] = 2; obj[3] = 3; obj[4] = 4; obj.length = 5; var arr = obj.slice(0,-2); arr[2] === 2. Actual: ' + (arr[2]));
+}
+
+if (arr[3] !== undefined) {
+  throw new Test262Error('#6: var obj = {}; obj.slice = Array.prototype.slice; obj[0] = 0; obj[1] = 1; obj[2] = 2; obj[3] = 3; obj[4] = 4; obj.length = 5; var arr = obj.slice(0,-2); arr[3] === undefined. Actual: ' + (arr[3]));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/slice/S15.4.4.10_A2_T4.js b/js/src/tests/test262/built-ins/Array/prototype/slice/S15.4.4.10_A2_T4.js
new file mode 100644
index 0000000000..2b70862d78
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/slice/S15.4.4.10_A2_T4.js
@@ -0,0 +1,49 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    The slice function is intentionally generic.
+    It does not require that its this value be an Array object
+esid: sec-array.prototype.slice
+description: >
+    If start is negative, use max(start + length, 0).  If end is
+    negative, use max(end + length, 0)
+---*/
+
+var obj = {};
+obj.slice = Array.prototype.slice;
+obj[0] = 0;
+obj[1] = 1;
+obj[2] = 2;
+obj[3] = 3;
+obj[4] = 4;
+obj.length = 5;
+var arr = obj.slice(-5, -2);
+
+arr.getClass = Object.prototype.toString;
+if (arr.getClass() !== "[object " + "Array" + "]") {
+  throw new Test262Error('#1: var obj = {}; obj.slice = Array.prototype.slice; obj[0] = 0; obj[1] = 1; obj[2] = 2; obj[3] = 3; obj[4] = 4; obj.length = 5; var arr = obj.slice(-5,-2); arr is Array object. Actual: ' + (arr.getClass()));
+}
+
+if (arr.length !== 3) {
+  throw new Test262Error('#2: var obj = {}; obj.slice = Array.prototype.slice; obj[0] = 0; obj[1] = 1; obj[2] = 2; obj[3] = 3; obj[4] = 4; obj.length = 5; var arr = obj.slice(-5,-2); arr.length === 3. Actual: ' + (arr.length));
+}
+
+if (arr[0] !== 0) {
+  throw new Test262Error('#3: var obj = {}; obj.slice = Array.prototype.slice; obj[0] = 0; obj[1] = 1; obj[2] = 2; obj[3] = 3; obj[4] = 4; obj.length = 5; var arr = obj.slice(-5,-2); arr[0] === 0. Actual: ' + (arr[0]));
+}
+
+if (arr[1] !== 1) {
+  throw new Test262Error('#4: var obj = {}; obj.slice = Array.prototype.slice; obj[0] = 0; obj[1] = 1; obj[2] = 2; obj[3] = 3; obj[4] = 4; obj.length = 5; var arr = obj.slice(-5,-2); arr[1] === 1. Actual: ' + (arr[1]));
+}
+
+if (arr[2] !== 2) {
+  throw new Test262Error('#5: var obj = {}; obj.slice = Array.prototype.slice; obj[0] = 0; obj[1] = 1; obj[2] = 2; obj[3] = 3; obj[4] = 4; obj.length = 5; var arr = obj.slice(-5,-2); arr[2] === 2. Actual: ' + (arr[2]));
+}
+
+if (arr[3] !== undefined) {
+  throw new Test262Error('#6: var obj = {}; obj.slice = Array.prototype.slice; obj[0] = 0; obj[1] = 1; obj[2] = 2; obj[3] = 3; obj[4] = 4; obj.length = 5; var arr = obj.slice(-5,-2); arr[3] === undefined. Actual: ' + (arr[3]));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/slice/S15.4.4.10_A2_T5.js b/js/src/tests/test262/built-ins/Array/prototype/slice/S15.4.4.10_A2_T5.js
new file mode 100644
index 0000000000..5adbd4e740
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/slice/S15.4.4.10_A2_T5.js
@@ -0,0 +1,47 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    The slice function is intentionally generic.
+    It does not require that its this value be an Array object
+esid: sec-array.prototype.slice
+description: If end is undefined use length
+---*/
+
+var obj = {};
+obj.slice = Array.prototype.slice;
+obj[0] = 0;
+obj[1] = 1;
+obj[2] = 2;
+obj[3] = 3;
+obj[4] = 4;
+obj.length = 5;
+var arr = obj.slice(2);
+
+arr.getClass = Object.prototype.toString;
+if (arr.getClass() !== "[object " + "Array" + "]") {
+  throw new Test262Error('#1: var obj = {}; obj.slice = Array.prototype.slice; obj[0] = 0; obj[1] = 1; obj[2] = 2; obj[3] = 3; obj[4] = 4; obj.length = 5; var arr = obj.slice(2); arr is Array object. Actual: ' + (arr.getClass()));
+}
+
+if (arr.length !== 3) {
+  throw new Test262Error('#2: var obj = {}; obj.slice = Array.prototype.slice; obj[0] = 0; obj[1] = 1; obj[2] = 2; obj[3] = 3; obj[4] = 4; obj.length = 5; var arr = obj.slice(2); arr.length === 3. Actual: ' + (arr.length));
+}
+
+if (arr[0] !== 2) {
+  throw new Test262Error('#3: var obj = {}; obj.slice = Array.prototype.slice; obj[0] = 0; obj[1] = 1; obj[2] = 2; obj[3] = 3; obj[4] = 4; obj.length = 5; var arr = obj.slice(2); arr[0] === 2. Actual: ' + (arr[0]));
+}
+
+if (arr[1] !== 3) {
+  throw new Test262Error('#4: var obj = {}; obj.slice = Array.prototype.slice; obj[0] = 0; obj[1] = 1; obj[2] = 2; obj[3] = 3; obj[4] = 4; obj.length = 5; var arr = obj.slice(2); arr[1] === 3. Actual: ' + (arr[1]));
+}
+
+if (arr[2] !== 4) {
+  throw new Test262Error('#5: var obj = {}; obj.slice = Array.prototype.slice; obj[0] = 0; obj[1] = 1; obj[2] = 2; obj[3] = 3; obj[4] = 4; obj.length = 5; var arr = obj.slice(2); arr[2] === 4. Actual: ' + (arr[2]));
+}
+
+if (arr[3] !== undefined) {
+  throw new Test262Error('#6: var obj = {}; obj.slice = Array.prototype.slice; obj[0] = 0; obj[1] = 1; obj[2] = 2; obj[3] = 3; obj[4] = 4; obj.length = 5; var arr = obj.slice(2); arr[3] === undefined. Actual: ' + (arr[3]));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/slice/S15.4.4.10_A2_T6.js b/js/src/tests/test262/built-ins/Array/prototype/slice/S15.4.4.10_A2_T6.js
new file mode 100644
index 0000000000..1646ec6982
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/slice/S15.4.4.10_A2_T6.js
@@ -0,0 +1,47 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    The slice function is intentionally generic.
+    It does not require that its this value be an Array object
+esid: sec-array.prototype.slice
+description: If end is undefined use length
+---*/
+
+var obj = {};
+obj.slice = Array.prototype.slice;
+obj[0] = 0;
+obj[1] = 1;
+obj[2] = 2;
+obj[3] = 3;
+obj[4] = 4;
+obj.length = 5;
+var arr = obj.slice(2, undefined);
+
+arr.getClass = Object.prototype.toString;
+if (arr.getClass() !== "[object " + "Array" + "]") {
+  throw new Test262Error('#1: var obj = {}; obj.slice = Array.prototype.slice; obj[0] = 0; obj[1] = 1; obj[2] = 2; obj[3] = 3; obj[4] = 4; obj.length = 5; var arr = obj.slice(2, undefined); arr is Array object. Actual: ' + (arr.getClass()));
+}
+
+if (arr.length !== 3) {
+  throw new Test262Error('#2: var obj = {}; obj.slice = Array.prototype.slice; obj[0] = 0; obj[1] = 1; obj[2] = 2; obj[3] = 3; obj[4] = 4; obj.length = 5; var arr = obj.slice(2, undefined); arr.length === 3. Actual: ' + (arr.length));
+}
+
+if (arr[0] !== 2) {
+  throw new Test262Error('#3: var obj = {}; obj.slice = Array.prototype.slice; obj[0] = 0; obj[1] = 1; obj[2] = 2; obj[3] = 3; obj[4] = 4; obj.length = 5; var arr = obj.slice(2, undefined); arr[0] === 2. Actual: ' + (arr[0]));
+}
+
+if (arr[1] !== 3) {
+  throw new Test262Error('#4: var obj = {}; obj.slice = Array.prototype.slice; obj[0] = 0; obj[1] = 1; obj[2] = 2; obj[3] = 3; obj[4] = 4; obj.length = 5; var arr = obj.slice(2, undefined); arr[1] === 3. Actual: ' + (arr[1]));
+}
+
+if (arr[2] !== 4) {
+  throw new Test262Error('#5: var obj = {}; obj.slice = Array.prototype.slice; obj[0] = 0; obj[1] = 1; obj[2] = 2; obj[3] = 3; obj[4] = 4; obj.length = 5; var arr = obj.slice(2, undefined); arr[2] === 4. Actual: ' + (arr[2]));
+}
+
+if (arr[3] !== undefined) {
+  throw new Test262Error('#6: var obj = {}; obj.slice = Array.prototype.slice; obj[0] = 0; obj[1] = 1; obj[2] = 2; obj[3] = 3; obj[4] = 4; obj.length = 5; var arr = obj.slice(2, undefined); arr[3] === undefined. Actual: ' + (arr[3]));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/slice/S15.4.4.10_A3_T1.js b/js/src/tests/test262/built-ins/Array/prototype/slice/S15.4.4.10_A3_T1.js
new file mode 100644
index 0000000000..882be8b71b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/slice/S15.4.4.10_A3_T1.js
@@ -0,0 +1,19 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: Check ToLength(length) for non Array objects
+esid: sec-array.prototype.slice
+description: length = 4294967296
+---*/
+
+assert.throws(RangeError, () => {
+  var obj = {};
+  obj.slice = Array.prototype.slice;
+  obj[0] = "x";
+  obj[4294967295] = "y";
+  obj.length = 4294967296;
+  obj.slice(0, 4294967296);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/slice/S15.4.4.10_A3_T2.js b/js/src/tests/test262/built-ins/Array/prototype/slice/S15.4.4.10_A3_T2.js
new file mode 100644
index 0000000000..45d225c6b7
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/slice/S15.4.4.10_A3_T2.js
@@ -0,0 +1,19 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: Check ToLength(length) for non Array objects
+esid: sec-array.prototype.slice
+description: length = 4294967297
+---*/
+
+assert.throws(RangeError, () => {
+  var obj = {};
+  obj.slice = Array.prototype.slice;
+  obj[0] = "x";
+  obj[4294967296] = "y";
+  obj.length = 4294967297;
+  obj.slice(0, 4294967297);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/slice/S15.4.4.10_A3_T3.js b/js/src/tests/test262/built-ins/Array/prototype/slice/S15.4.4.10_A3_T3.js
new file mode 100644
index 0000000000..876eb9c4f9
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/slice/S15.4.4.10_A3_T3.js
@@ -0,0 +1,24 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: Check ToUint32(length) for non Array objects
+esid: sec-array.prototype.slice
+description: length = -1
+---*/
+
+var obj = {};
+obj.slice = Array.prototype.slice;
+obj[4294967294] = "x";
+obj.length = -1;
+var arr = obj.slice(4294967294, 4294967295);
+
+if (arr.length !== 0) {
+  throw new Test262Error('#1: var obj = {}; obj.slice = Array.prototype.slice; obj[4294967294] = "x"; obj.length = 4294967295; var arr = obj.slice(4294967294,4294967295); arr.length === 0. Actual: ' + (arr.length));
+}
+
+if (arr[0] !== undefined) {
+  throw new Test262Error('#3: var obj = {}; obj.slice = Array.prototype.slice; obj[4294967294] = "x"; obj.length = 4294967295; var arr = obj.slice(4294967294,4294967295); arr[0] === undefined. Actual: ' + (arr[0]));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/slice/S15.4.4.10_A4_T1.js b/js/src/tests/test262/built-ins/Array/prototype/slice/S15.4.4.10_A4_T1.js
new file mode 100644
index 0000000000..210f014a96
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/slice/S15.4.4.10_A4_T1.js
@@ -0,0 +1,27 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: "[[Get]] from not an inherited property"
+esid: sec-array.prototype.slice
+description: "[[Prototype]] of Array instance is Array.prototype"
+---*/
+
+Array.prototype[1] = 1;
+var x = [0];
+x.length = 2;
+var arr = x.slice();
+
+if (arr[0] !== 0) {
+  throw new Test262Error('#1: Array.prototype[1] = 1; x = [0]; x.length = 2; var arr = x.slice(); arr[0] === 0. Actual: ' + (arr[0]));
+}
+
+if (arr[1] !== 1) {
+  throw new Test262Error('#2: Array.prototype[1] = 1; x = [0]; x.length = 2; var arr = x.slice(); arr[1] === 1. Actual: ' + (arr[1]));
+}
+
+if (arr.hasOwnProperty('1') !== true) {
+  throw new Test262Error('#3: Array.prototype[1] = 1; x = [0]; x.length = 2; var arr = x.slice(); arr.hasOwnProperty(\'1\') === true. Actual: ' + (arr.hasOwnProperty('1')));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/slice/browser.js b/js/src/tests/test262/built-ins/Array/prototype/slice/browser.js
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/js/src/tests/test262/built-ins/Array/prototype/slice/call-with-boolean.js b/js/src/tests/test262/built-ins/Array/prototype/slice/call-with-boolean.js
new file mode 100644
index 0000000000..7441affadc
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/slice/call-with-boolean.js
@@ -0,0 +1,13 @@
+// Copyright (c) 2020 Rick Waldron.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.slice
+description: Array.prototype.slice applied to boolean primitive
+includes: [compareArray.js]
+---*/
+
+assert.compareArray(Array.prototype.slice.call(true), [], 'Array.prototype.slice.call(true) must return []');
+assert.compareArray(Array.prototype.slice.call(false), [], 'Array.prototype.slice.call(false) must return []');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/slice/create-ctor-non-object.js b/js/src/tests/test262/built-ins/Array/prototype/slice/create-ctor-non-object.js
new file mode 100644
index 0000000000..6dd21c084f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/slice/create-ctor-non-object.js
@@ -0,0 +1,45 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.slice
+description: >
+    Behavior when `constructor` property is neither an Object nor undefined
+info: |
+    [...]
+    8. Let A be ? ArraySpeciesCreate(O, count).
+    [...]
+
+    9.4.2.3 ArraySpeciesCreate
+
+    [...]
+    5. Let C be ? Get(originalArray, "constructor").
+    [...]
+    9. If IsConstructor(C) is false, throw a TypeError exception.
+---*/
+
+var a = [];
+
+a.constructor = null;
+assert.throws(TypeError, function() {
+  a.slice();
+}, 'null value');
+
+a = [];
+a.constructor = 1;
+assert.throws(TypeError, function() {
+  a.slice();
+}, 'number value');
+
+a = [];
+a.constructor = 'string';
+assert.throws(TypeError, function() {
+  a.slice();
+}, 'string value');
+
+a = [];
+a.constructor = true;
+assert.throws(TypeError, function() {
+  a.slice();
+}, 'boolean value');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/slice/create-ctor-poisoned.js b/js/src/tests/test262/built-ins/Array/prototype/slice/create-ctor-poisoned.js
new file mode 100644
index 0000000000..bc5755d3ab
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/slice/create-ctor-poisoned.js
@@ -0,0 +1,29 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.slice
+description: Abrupt completion from `constructor` property access
+info: |
+    [...]
+    8. Let A be ? ArraySpeciesCreate(O, count).
+    [...]
+
+    9.4.2.3 ArraySpeciesCreate
+
+    [...]
+    5. Let C be ? Get(originalArray, "constructor").
+---*/
+
+var a = [];
+
+Object.defineProperty(a, 'constructor', {
+  get: function() {
+    throw new Test262Error();
+  }
+});
+
+assert.throws(Test262Error, function() {
+  a.slice();
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/slice/create-non-array-invalid-len.js b/js/src/tests/test262/built-ins/Array/prototype/slice/create-non-array-invalid-len.js
new file mode 100644
index 0000000000..2e357f8c76
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/slice/create-non-array-invalid-len.js
@@ -0,0 +1,44 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.slice
+description: Abrupt completion from creating a new array
+info: |
+    [...]
+    8. Let A be ? ArraySpeciesCreate(O, count).
+    [...]
+
+    9.4.2.3 ArraySpeciesCreate
+
+    [...]
+    3. Let isArray be ? IsArray(originalArray).
+    4. If isArray is false, return ? ArrayCreate(length).
+
+    9.4.2.2 ArrayCreate
+
+    [...]
+    3. If length>232-1, throw a RangeError exception.
+---*/
+
+var callCount = 0;
+var maxLength = Math.pow(2, 32);
+var obj = Object.defineProperty({}, 'length', {
+  get: function() {
+    return maxLength;
+  },
+  set: function() {
+    callCount += 1;
+  }
+});
+
+assert.throws(RangeError, function() {
+  Array.prototype.slice.call(obj);
+});
+
+assert.sameValue(
+  callCount,
+  0,
+  'RangeError thrown during array creation, not property modification'
+);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/slice/create-non-array.js b/js/src/tests/test262/built-ins/Array/prototype/slice/create-non-array.js
new file mode 100644
index 0000000000..27a2032e03
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/slice/create-non-array.js
@@ -0,0 +1,35 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.slice
+description: Constructor is ignored for non-Array values
+info: |
+    [...]
+    8. Let A be ? ArraySpeciesCreate(O, count).
+    [...]
+
+    9.4.2.3 ArraySpeciesCreate
+
+    [...]
+    3. Let isArray be ? IsArray(originalArray).
+    4. If isArray is false, return ? ArrayCreate(length).
+---*/
+
+var obj = {
+  length: 0
+};
+var callCount = 0;
+var result;
+Object.defineProperty(obj, 'constructor', {
+  get: function() {
+    callCount += 1;
+  }
+});
+
+result = Array.prototype.slice.call(obj);
+
+assert.sameValue(callCount, 0, '`constructor` property not accessed');
+assert.sameValue(Object.getPrototypeOf(result), Array.prototype);
+assert(Array.isArray(result), 'result is an Array exotic object');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/slice/create-proto-from-ctor-realm-array.js b/js/src/tests/test262/built-ins/Array/prototype/slice/create-proto-from-ctor-realm-array.js
new file mode 100644
index 0000000000..79e647f5a6
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/slice/create-proto-from-ctor-realm-array.js
@@ -0,0 +1,45 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.slice
+description: Prefer Array constructor of current realm record
+info: |
+    1. Let O be ? ToObject(this value).
+    [...]
+    8. Let A be ? ArraySpeciesCreate(O, count).
+    [...]
+
+    9.4.2.3 ArraySpeciesCreate
+
+    [...]
+    5. Let C be ? Get(originalArray, "constructor").
+    6. If IsConstructor(C) is true, then
+       a. Let thisRealm be the current Realm Record.
+       b. Let realmC be ? GetFunctionRealm(C).
+       c. If thisRealm and realmC are not the same Realm Record, then
+          i. If SameValue(C, realmC.[[Intrinsics]].[[%Array%]]) is true, let C
+             be undefined.
+    [...]
+features: [cross-realm, Symbol.species]
+---*/
+
+var array = [];
+var callCount = 0;
+var OArray = $262.createRealm().global.Array;
+var speciesDesc = {
+  get: function() {
+    callCount += 1;
+  }
+};
+var result;
+array.constructor = OArray;
+
+Object.defineProperty(Array, Symbol.species, speciesDesc);
+Object.defineProperty(OArray, Symbol.species, speciesDesc);
+
+result = array.slice();
+
+assert.sameValue(Object.getPrototypeOf(result), Array.prototype);
+assert.sameValue(callCount, 0, 'Species constructor is not referenced');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/slice/create-proto-from-ctor-realm-non-array.js b/js/src/tests/test262/built-ins/Array/prototype/slice/create-proto-from-ctor-realm-non-array.js
new file mode 100644
index 0000000000..e586b619b7
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/slice/create-proto-from-ctor-realm-non-array.js
@@ -0,0 +1,46 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.slice
+description: Accept non-Array constructors from other realms
+info: |
+    1. Let O be ? ToObject(this value).
+    [...]
+    8. Let A be ? ArraySpeciesCreate(O, count).
+    [...]
+
+    9.4.2.3 ArraySpeciesCreate
+
+    [...]
+    5. Let C be ? Get(originalArray, "constructor").
+    6. If IsConstructor(C) is true, then
+       a. Let thisRealm be the current Realm Record.
+       b. Let realmC be ? GetFunctionRealm(C).
+       c. If thisRealm and realmC are not the same Realm Record, then
+          i. If SameValue(C, realmC.[[Intrinsics]].[[%Array%]]) is true, let C
+             be undefined.
+    [...]
+features: [cross-realm, Symbol.species]
+---*/
+
+var array = [];
+var callCount = 0;
+var CustomCtor = function() {};
+var OObject = $262.createRealm().global.Object;
+var speciesDesc = {
+  get: function() {
+    callCount += 1;
+  }
+};
+var result;
+array.constructor = OObject;
+OObject[Symbol.species] = CustomCtor;
+
+Object.defineProperty(Array, Symbol.species, speciesDesc);
+
+result = array.slice();
+
+assert.sameValue(Object.getPrototypeOf(result), CustomCtor.prototype);
+assert.sameValue(callCount, 0, 'Array species constructor is not referenced');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/slice/create-proxied-array-invalid-len.js b/js/src/tests/test262/built-ins/Array/prototype/slice/create-proxied-array-invalid-len.js
new file mode 100644
index 0000000000..8560161f69
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/slice/create-proxied-array-invalid-len.js
@@ -0,0 +1,54 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.slice
+description: >
+    Ensure a RangeError is thrown when a proxied array returns an invalid array length.
+info: |
+    [...]
+    8. Let A be ? ArraySpeciesCreate(O, count).
+    [...]
+
+    9.4.2.3 ArraySpeciesCreate
+
+    [...]
+    3. Let isArray be ? IsArray(originalArray).
+    [...]
+    5. Let C be ? Get(originalArray, "constructor").
+    [...]
+    10. Return ? Construct(C, « length »).
+
+    9.4.2.2 ArrayCreate
+
+    [...]
+    3. If length>2^32-1, throw a RangeError exception.
+features: [Proxy]
+---*/
+
+var array = [];
+var maxLength = Math.pow(2, 32);
+var callCount = 0;
+var proxy = new Proxy(array, {
+  get: function(_, name) {
+    if (name === 'length') {
+      return maxLength;
+    }
+    return array[name];
+  },
+  set: function() {
+    callCount += 1;
+    return true;
+  }
+});
+
+assert.throws(RangeError, function() {
+  Array.prototype.slice.call(proxy);
+});
+
+assert.sameValue(
+  callCount,
+  0,
+  'RangeError thrown during array creation, not property modification'
+);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/slice/create-proxy.js b/js/src/tests/test262/built-ins/Array/prototype/slice/create-proxy.js
new file mode 100644
index 0000000000..7ad8ec6ea7
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/slice/create-proxy.js
@@ -0,0 +1,41 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.slice
+description: Species constructor of a Proxy object whose target is an array
+info: |
+    [...]
+    8. Let A be ? ArraySpeciesCreate(O, count).
+    [...]
+    12. Return A.
+
+    9.4.2.3 ArraySpeciesCreate
+
+    [...]
+    3. Let isArray be ? IsArray(originalArray).
+
+    7.2.2 IsArray
+
+    [...]
+    3. If argument is a Proxy exotic object, then
+       a. If the value of the [[ProxyHandler]] internal slot of argument is
+          null, throw a TypeError exception.
+       b. Let target be the value of the [[ProxyTarget]] internal slot of
+          argument.
+       c. Return ? IsArray(target).
+features: [Proxy, Symbol.species]
+---*/
+
+var array = [];
+var proxy = new Proxy(new Proxy(array, {}), {});
+var Ctor = function() {};
+var result;
+
+array.constructor = function() {};
+array.constructor[Symbol.species] = Ctor;
+
+result = Array.prototype.slice.call(proxy);
+
+assert.sameValue(Object.getPrototypeOf(result), Ctor.prototype);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/slice/create-revoked-proxy.js b/js/src/tests/test262/built-ins/Array/prototype/slice/create-revoked-proxy.js
new file mode 100644
index 0000000000..3c240a5f2d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/slice/create-revoked-proxy.js
@@ -0,0 +1,41 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.slice
+description: Abrupt completion from constructor that is a revoked Proxy object
+info: |
+    [...]
+    8. Let A be ? ArraySpeciesCreate(O, count).
+    [...]
+
+    9.4.2.3 ArraySpeciesCreate
+
+    [...]
+    3. Let isArray be ? IsArray(originalArray).
+
+    7.2.2 IsArray
+
+    [...]
+    3. If argument is a Proxy exotic object, then
+       a. If the value of the [[ProxyHandler]] internal slot of argument is
+          null, throw a TypeError exception.
+features: [Proxy]
+---*/
+
+var o = Proxy.revocable([], {});
+var callCount = 0;
+
+Object.defineProperty(o.proxy, 'constructor', {
+  get: function() {
+    callCount += 1;
+  }
+});
+o.revoke();
+
+assert.throws(TypeError, function() {
+  Array.prototype.slice.call(o.proxy);
+});
+
+assert.sameValue(callCount, 0, '`constructor` property not accessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/slice/create-species-abrupt.js b/js/src/tests/test262/built-ins/Array/prototype/slice/create-species-abrupt.js
new file mode 100644
index 0000000000..68755f9954
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/slice/create-species-abrupt.js
@@ -0,0 +1,35 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.slice
+description: Species constructor returns an abrupt completion
+info: |
+    [...]
+    8. Let A be ? ArraySpeciesCreate(O, count).
+    [...]
+
+    9.4.2.3 ArraySpeciesCreate
+
+    [...]
+    5. Let C be ? Get(originalArray, "constructor").
+    [...]
+    7. If Type(C) is Object, then
+       a. Let C be ? Get(C, @@species).
+       b. If C is null, let C be undefined.
+    [...]
+    10. Return ? Construct(C, « length »).
+features: [Symbol.species]
+---*/
+
+var Ctor = function() {
+  throw new Test262Error();
+};
+var a = [];
+a.constructor = {};
+a.constructor[Symbol.species] = Ctor;
+
+assert.throws(Test262Error, function() {
+  a.slice();
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/slice/create-species-neg-zero.js b/js/src/tests/test262/built-ins/Array/prototype/slice/create-species-neg-zero.js
new file mode 100644
index 0000000000..7ad5e272da
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/slice/create-species-neg-zero.js
@@ -0,0 +1,47 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.slice
+description: The value `-0` is converted to `0`
+info: |
+    [...]
+    3. Let relativeStart be ? ToInteger(start).
+    4. If relativeStart < 0, let k be max((len + relativeStart), 0); else let k
+       be min(relativeStart, len).
+    5. If end is undefined, let relativeEnd be len; else let relativeEnd be ?
+       ToInteger(end).
+    6. If relativeEnd < 0, let final be max((len + relativeEnd), 0); else let
+       final be min(relativeEnd, len).
+    7. Let count be max(final - k, 0).
+    8. Let A be ? ArraySpeciesCreate(O, count).
+    [...]
+
+    9.4.2.3 ArraySpeciesCreate
+
+    [...]
+    2. If length is -0, let length be +0.
+    [...]
+    5. Let C be ? Get(originalArray, "constructor").
+    [...]
+    7. If Type(C) is Object, then
+       a. Let C be ? Get(C, @@species).
+       b. If C is null, let C be undefined.
+    [...]
+    10. Return ? Construct(C, « length »).
+features: [Symbol.species]
+---*/
+
+var args;
+var Ctor = function() {
+  args = arguments;
+};
+var a = [];
+a.constructor = {};
+a.constructor[Symbol.species] = Ctor;
+
+a.slice(0, -0);
+
+assert.sameValue(args.length, 1);
+assert.sameValue(args[0], 0);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/slice/create-species-non-ctor.js b/js/src/tests/test262/built-ins/Array/prototype/slice/create-species-non-ctor.js
new file mode 100644
index 0000000000..bb254dfbad
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/slice/create-species-non-ctor.js
@@ -0,0 +1,41 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.slice
+description: >
+    Behavior when the @@species attribute is a non-constructor object
+info: |
+    [...]
+    8. Let A be ? ArraySpeciesCreate(O, count).
+    [...]
+
+    9.4.2.3 ArraySpeciesCreate
+
+    [...]
+    5. Let C be ? Get(originalArray, "constructor").
+    [...]
+    7. If Type(C) is Object, then
+       a. Let C be ? Get(C, @@species).
+       b. If C is null, let C be undefined.
+    [...]
+    9. If IsConstructor(C) is false, throw a TypeError exception.
+includes: [isConstructor.js]
+features: [Symbol.species, Reflect.construct]
+---*/
+
+assert.sameValue(
+  isConstructor(parseInt),
+  false,
+  'precondition: isConstructor(parseInt) must return false'
+);
+
+var a = [];
+
+a.constructor = {};
+a.constructor[Symbol.species] = parseInt;
+
+assert.throws(TypeError, function() {
+  a.slice();
+}, 'a.slice() throws a TypeError exception');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/slice/create-species-null.js b/js/src/tests/test262/built-ins/Array/prototype/slice/create-species-null.js
new file mode 100644
index 0000000000..b8788d0176
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/slice/create-species-null.js
@@ -0,0 +1,35 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.slice
+description: >
+    A null value for the @@species constructor is interpreted as `undefined`
+info: |
+    [...]
+    8. Let A be ? ArraySpeciesCreate(O, count).
+    [...]
+
+    9.4.2.3 ArraySpeciesCreate
+
+    [...]
+    5. Let C be ? Get(originalArray, "constructor").
+    [...]
+    7. If Type(C) is Object, then
+       a. Let C be ? Get(C, @@species).
+       b. If C is null, let C be undefined.
+    8. If C is undefined, return ? ArrayCreate(length).
+features: [Symbol.species]
+---*/
+
+var a = [];
+var result;
+
+a.constructor = {};
+a.constructor[Symbol.species] = null;
+
+result = a.slice();
+
+assert.sameValue(Object.getPrototypeOf(result), Array.prototype);
+assert(Array.isArray(result), 'result is an Array exotic object');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/slice/create-species-poisoned.js b/js/src/tests/test262/built-ins/Array/prototype/slice/create-species-poisoned.js
new file mode 100644
index 0000000000..dca55c685a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/slice/create-species-poisoned.js
@@ -0,0 +1,34 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.slice
+description: Abrupt completion from `@@species` property access
+info: |
+    [...]
+    8. Let A be ? ArraySpeciesCreate(O, count).
+    [...]
+
+    9.4.2.3 ArraySpeciesCreate
+
+    [...]
+    5. Let C be ? Get(originalArray, "constructor").
+    [...]
+    7. If Type(C) is Object, then
+       a. Let C be ? Get(C, @@species).
+features: [Symbol.species]
+---*/
+
+var a = [];
+a.constructor = {};
+
+Object.defineProperty(a.constructor, Symbol.species, {
+  get: function() {
+    throw new Test262Error();
+  }
+});
+
+assert.throws(Test262Error, function() {
+  a.slice();
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/slice/create-species-undef.js b/js/src/tests/test262/built-ins/Array/prototype/slice/create-species-undef.js
new file mode 100644
index 0000000000..f92c033c79
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/slice/create-species-undef.js
@@ -0,0 +1,36 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.slice
+description: >
+    An undefined value for the @@species constructor triggers the creation  of
+    an Array exotic object
+info: |
+    [...]
+    8. Let A be ? ArraySpeciesCreate(O, count).
+    [...]
+
+    9.4.2.3 ArraySpeciesCreate
+
+    [...]
+    5. Let C be ? Get(originalArray, "constructor").
+    [...]
+    7. If Type(C) is Object, then
+       a. Let C be ? Get(C, @@species).
+       b. If C is null, let C be undefined.
+    8. If C is undefined, return ? ArrayCreate(length).
+features: [Symbol.species]
+---*/
+
+var a = [];
+var result;
+
+a.constructor = {};
+a.constructor[Symbol.species] = undefined;
+
+result = a.slice();
+
+assert.sameValue(Object.getPrototypeOf(result), Array.prototype);
+assert(Array.isArray(result), 'result is an Array exotic object');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/slice/create-species.js b/js/src/tests/test262/built-ins/Array/prototype/slice/create-species.js
new file mode 100644
index 0000000000..f27c43cf12
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/slice/create-species.js
@@ -0,0 +1,45 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.slice
+description: Species constructor is used to create a new instance
+info: |
+    [...]
+    8. Let A be ? ArraySpeciesCreate(O, count).
+    [...]
+
+    9.4.2.3 ArraySpeciesCreate
+
+    [...]
+    5. Let C be ? Get(originalArray, "constructor").
+    [...]
+    7. If Type(C) is Object, then
+       a. Let C be ? Get(C, @@species).
+       b. If C is null, let C be undefined.
+    [...]
+    10. Return ? Construct(C, « length »).
+features: [Symbol.species]
+---*/
+
+var thisValue, args, result;
+var callCount = 0;
+var instance = [];
+var Ctor = function() {
+  callCount += 1;
+  thisValue = this;
+  args = arguments;
+  return instance;
+};
+var a = [1, 2, 3, 4, 5];
+a.constructor = {};
+a.constructor[Symbol.species] = Ctor;
+
+result = a.slice(1, -1);
+
+assert.sameValue(callCount, 1, 'Constructor invoked exactly once');
+assert.sameValue(Object.getPrototypeOf(thisValue), Ctor.prototype);
+assert.sameValue(args.length, 1, 'Constructor invoked with a single argument');
+assert.sameValue(args[0], 3);
+assert.sameValue(result, instance);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/slice/length-exceeding-integer-limit-proxied-array.js b/js/src/tests/test262/built-ins/Array/prototype/slice/length-exceeding-integer-limit-proxied-array.js
new file mode 100644
index 0000000000..115de6fd58
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/slice/length-exceeding-integer-limit-proxied-array.js
@@ -0,0 +1,59 @@
+// Copyright (C) 2017 André Bargull. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.slice
+description: >
+  Length property is clamped to 2^53-1, test with indices near 2^53-1 and negative indices
+  and a proxy to an array.
+info: |
+  ...
+  2. Let len be ? ToLength(? Get(O, "length")).
+  3. Let relativeStart be ? ToInteger(start).
+  4. If relativeStart < 0, let k be max((len + relativeStart), 0);
+     else let k be min(relativeStart, len).
+  5. If end is undefined, let relativeEnd be len; else let relativeEnd be ? ToInteger(end).
+  6. If relativeEnd < 0, let final be max((len + relativeEnd), 0);
+     else let final be min(relativeEnd, len).
+  ...
+includes: [compareArray.js]
+features: [exponentiation]
+---*/
+
+var array = [];
+array["9007199254740988"] = "9007199254740988";
+array["9007199254740989"] = "9007199254740989";
+array["9007199254740990"] = "9007199254740990";
+array["9007199254740991"] = "9007199254740991";
+
+// Create a proxy to an array object, so IsArray returns true, but we can still
+// return a length value exceeding the integer limit.
+var proxy = new Proxy(array, {
+  get(t, pk, r) {
+    if (pk === "length")
+      return 2 ** 53 + 2;
+    return Reflect.get(t, pk, r);
+  }
+});
+
+var result = Array.prototype.slice.call(proxy, 9007199254740989);
+assert.compareArray(result, ["9007199254740989", "9007199254740990"],
+  'The value of result is expected to be ["9007199254740989", "9007199254740990"]');
+
+var result = Array.prototype.slice.call(proxy, 9007199254740989, 9007199254740990);
+assert.compareArray(result, ["9007199254740989"],
+  'The value of result is expected to be ["9007199254740989"]');
+
+var result = Array.prototype.slice.call(proxy, 9007199254740989, 9007199254740996);
+assert.compareArray(result, ["9007199254740989", "9007199254740990"],
+  'The value of result is expected to be ["9007199254740989", "9007199254740990"]');
+
+var result = Array.prototype.slice.call(proxy, -2);
+assert.compareArray(result, ["9007199254740989", "9007199254740990"],
+  'The value of result is expected to be ["9007199254740989", "9007199254740990"]');
+
+var result = Array.prototype.slice.call(proxy, -2, -1);
+assert.compareArray(result, ["9007199254740989"],
+  'The value of result is expected to be ["9007199254740989"]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/slice/length-exceeding-integer-limit.js b/js/src/tests/test262/built-ins/Array/prototype/slice/length-exceeding-integer-limit.js
new file mode 100644
index 0000000000..789447f7de
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/slice/length-exceeding-integer-limit.js
@@ -0,0 +1,50 @@
+// Copyright (C) 2017 André Bargull. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.slice
+description: >
+  Length property is clamped to 2^53-1, test with indices near 2^53-1 and negative indices.
+info: |
+  ...
+  2. Let len be ? ToLength(? Get(O, "length")).
+  3. Let relativeStart be ? ToInteger(start).
+  4. If relativeStart < 0, let k be max((len + relativeStart), 0);
+     else let k be min(relativeStart, len).
+  5. If end is undefined, let relativeEnd be len; else let relativeEnd be ? ToInteger(end).
+  6. If relativeEnd < 0, let final be max((len + relativeEnd), 0);
+     else let final be min(relativeEnd, len).
+  ...
+includes: [compareArray.js]
+features: [exponentiation]
+---*/
+
+var arrayLike = {
+  "9007199254740988": "9007199254740988",
+  "9007199254740989": "9007199254740989",
+  "9007199254740990": "9007199254740990",
+  "9007199254740991": "9007199254740991",
+  length: 2 ** 53 + 2,
+};
+
+var result = Array.prototype.slice.call(arrayLike, 9007199254740989);
+assert.compareArray(result, ["9007199254740989", "9007199254740990"],
+  'The value of result is expected to be ["9007199254740989", "9007199254740990"]');
+
+var result = Array.prototype.slice.call(arrayLike, 9007199254740989, 9007199254740990);
+assert.compareArray(result, ["9007199254740989"],
+  'The value of result is expected to be ["9007199254740989"]');
+
+var result = Array.prototype.slice.call(arrayLike, 9007199254740989, 9007199254740996);
+assert.compareArray(result, ["9007199254740989", "9007199254740990"],
+  'The value of result is expected to be ["9007199254740989", "9007199254740990"]');
+
+var result = Array.prototype.slice.call(arrayLike, -2);
+assert.compareArray(result, ["9007199254740989", "9007199254740990"],
+  'The value of result is expected to be ["9007199254740989", "9007199254740990"]');
+
+var result = Array.prototype.slice.call(arrayLike, -2, -1);
+assert.compareArray(result, ["9007199254740989"],
+  'The value of result is expected to be ["9007199254740989"]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/slice/length.js b/js/src/tests/test262/built-ins/Array/prototype/slice/length.js
new file mode 100644
index 0000000000..2d0204600c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/slice/length.js
@@ -0,0 +1,30 @@
+// Copyright (C) 2017 Leo Balter. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.slice
+description: >
+  The "length" property of Array.prototype.slice
+info: |
+  17 ECMAScript Standard Built-in Objects
+
+  Every built-in function object, including constructors, has a length property
+  whose value is an integer. Unless otherwise specified, this value is equal to
+  the largest number of named arguments shown in the subclause headings for the
+  function description. Optional parameters (which are indicated with brackets:
+  [ ]) or rest parameters (which are shown using the form «...name») are not
+  included in the default argument count.
+
+  Unless otherwise specified, the length property of a built-in function object
+  has the attributes { [[Writable]]: false, [[Enumerable]]: false,
+    [[Configurable]]: true }.
+includes: [propertyHelper.js]
+---*/
+
+assert.sameValue(Array.prototype.slice.length, 2);
+
+verifyNotEnumerable(Array.prototype.slice, 'length');
+verifyNotWritable(Array.prototype.slice, 'length');
+verifyConfigurable(Array.prototype.slice, 'length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/slice/name.js b/js/src/tests/test262/built-ins/Array/prototype/slice/name.js
new file mode 100644
index 0000000000..b870be1e66
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/slice/name.js
@@ -0,0 +1,28 @@
+// Copyright (C) 2015 André Bargull. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.slice
+description: >
+  Array.prototype.slice.name is "slice".
+info: |
+  Array.prototype.slice (start, end)
+
+  17 ECMAScript Standard Built-in Objects:
+    Every built-in Function object, including constructors, that is not
+    identified as an anonymous function has a name property whose value
+    is a String.
+
+    Unless otherwise specified, the name property of a built-in Function
+    object, if it exists, has the attributes { [[Writable]]: false,
+    [[Enumerable]]: false, [[Configurable]]: true }.
+includes: [propertyHelper.js]
+---*/
+
+assert.sameValue(Array.prototype.slice.name, "slice");
+
+verifyNotEnumerable(Array.prototype.slice, "name");
+verifyNotWritable(Array.prototype.slice, "name");
+verifyConfigurable(Array.prototype.slice, "name");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/slice/not-a-constructor.js b/js/src/tests/test262/built-ins/Array/prototype/slice/not-a-constructor.js
new file mode 100644
index 0000000000..3504fae508
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/slice/not-a-constructor.js
@@ -0,0 +1,35 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Array.prototype.slice does not implement [[Construct]], is not new-able
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+
+  sec-evaluatenew
+
+  ...
+  7. If IsConstructor(constructor) is false, throw a TypeError exception.
+  ...
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Array.prototype.slice),
+  false,
+  'isConstructor(Array.prototype.slice) must return false'
+);
+
+assert.throws(TypeError, () => {
+  new Array.prototype.slice();
+}, '`new Array.prototype.slice()` throws TypeError');
+
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/slice/prop-desc.js b/js/src/tests/test262/built-ins/Array/prototype/slice/prop-desc.js
new file mode 100644
index 0000000000..d0cd563ad9
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/slice/prop-desc.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2017 Leo Balter. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.slice
+description: >
+  "slice" property of Array.prototype
+info: |
+  17 ECMAScript Standard Built-in Objects
+  
+  Every other data property described in clauses 18 through 26 and in Annex B.2
+  has the attributes { [[Writable]]: true, [[Enumerable]]: false,
+    [[Configurable]]: true } unless otherwise specified.
+includes: [propertyHelper.js]
+---*/
+
+assert.sameValue(typeof Array.prototype.slice, 'function', 'typeof');
+
+verifyNotEnumerable(Array.prototype, "slice");
+verifyWritable(Array.prototype, "slice");
+verifyConfigurable(Array.prototype, "slice");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/slice/shell.js b/js/src/tests/test262/built-ins/Array/prototype/slice/shell.js
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/js/src/tests/test262/built-ins/Array/prototype/slice/target-array-non-extensible.js b/js/src/tests/test262/built-ins/Array/prototype/slice/target-array-non-extensible.js
new file mode 100644
index 0000000000..b470eefb53
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/slice/target-array-non-extensible.js
@@ -0,0 +1,41 @@
+// Copyright (C) 2020 Alexey Shvayka. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.slice
+description: >
+  TypeError is thrown if CreateDataProperty fails.
+  (result object is non-extensible)
+info: |
+  Array.prototype.slice ( start, end )
+
+  [...]
+  10. Repeat, while k < final
+    [...]
+    c. If kPresent is true, then
+      [...]
+      ii. Perform ? CreateDataPropertyOrThrow(A, ! ToString(n), kValue).
+    [...]
+
+  CreateDataPropertyOrThrow ( O, P, V )
+
+  [...]
+  3. Let success be ? CreateDataProperty(O, P, V).
+  4. If success is false, throw a TypeError exception.
+features: [Symbol.species]
+---*/
+
+var A = function(_length) {
+  this.length = 0;
+  Object.preventExtensions(this);
+};
+
+var arr = [1];
+arr.constructor = {};
+arr.constructor[Symbol.species] = A;
+
+assert.throws(TypeError, function() {
+  arr.slice(0, 1);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/slice/target-array-with-non-configurable-property.js b/js/src/tests/test262/built-ins/Array/prototype/slice/target-array-with-non-configurable-property.js
new file mode 100644
index 0000000000..bc5ff6c8bb
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/slice/target-array-with-non-configurable-property.js
@@ -0,0 +1,43 @@
+// Copyright (C) 2020 Alexey Shvayka. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.slice
+description: >
+  TypeError is thrown if CreateDataProperty fails.
+  (result object's "0" is non-configurable)
+info: |
+  Array.prototype.slice ( start, end )
+
+  [...]
+  10. Repeat, while k < final
+    [...]
+    c. If kPresent is true, then
+      [...]
+      ii. Perform ? CreateDataPropertyOrThrow(A, ! ToString(n), kValue).
+    [...]
+
+  CreateDataPropertyOrThrow ( O, P, V )
+
+  [...]
+  3. Let success be ? CreateDataProperty(O, P, V).
+  4. If success is false, throw a TypeError exception.
+features: [Symbol.species]
+---*/
+
+var A = function(_length) {
+  Object.defineProperty(this, "0", {
+    set: function(_value) {},
+    configurable: false,
+  });
+};
+
+var arr = [1];
+arr.constructor = {};
+arr.constructor[Symbol.species] = A;
+
+assert.throws(TypeError, function() {
+  arr.slice(0, 1);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/slice/target-array-with-non-writable-property.js b/js/src/tests/test262/built-ins/Array/prototype/slice/target-array-with-non-writable-property.js
new file mode 100644
index 0000000000..7cb226e9e6
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/slice/target-array-with-non-writable-property.js
@@ -0,0 +1,38 @@
+// Copyright (C) 2018 André Bargull. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.slice
+description: >
+  Non-writable properties are overwritten by CreateDataPropertyOrThrow.
+info: |
+  22.1.3.23 Array.prototype.slice ( start, end )
+
+  ...
+  10. Repeat, while k < final
+    ...
+    c. If kPresent is true, then
+      ...
+      ii. Perform ? CreateDataPropertyOrThrow(A, ! ToString(n), kValue).
+    ...
+features: [Symbol.species]
+includes: [propertyHelper.js]
+---*/
+
+var a = [1];
+a.constructor = {};
+a.constructor[Symbol.species] = function(len) {
+    var q = new Array(0);
+    Object.defineProperty(q, 0, {
+        value: 0, writable: false, configurable: true, enumerable: false,
+    });
+    return q;
+};
+
+var r = a.slice(0);
+
+verifyProperty(r, 0, {
+    value: 1, writable: true, configurable: true, enumerable: true,
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-1-1.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-1-1.js
new file mode 100644
index 0000000000..e5686d5c61
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-1-1.js
@@ -0,0 +1,14 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: Array.prototype.some applied to undefined throws a TypeError
+---*/
+
+
+assert.throws(TypeError, function() {
+  Array.prototype.some.call(undefined);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-1-10.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-1-10.js
new file mode 100644
index 0000000000..bee571f686
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-1-10.js
@@ -0,0 +1,18 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: Array.prototype.some applied to the Math object
+---*/
+
+function callbackfn(val, idx, obj) {
+  return '[object Math]' === Object.prototype.toString.call(obj);
+}
+
+Math.length = 1;
+Math[0] = 1;
+
+assert(Array.prototype.some.call(Math, callbackfn), 'Array.prototype.some.call(Math, callbackfn) !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-1-11.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-1-11.js
new file mode 100644
index 0000000000..72a01a2661
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-1-11.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: Array.prototype.some applied to Date object
+---*/
+
+function callbackfn(val, idx, obj) {
+  return obj instanceof Date;
+}
+
+var obj = new Date();
+obj.length = 2;
+obj[0] = 11;
+obj[1] = 9;
+
+assert(Array.prototype.some.call(obj, callbackfn), 'Array.prototype.some.call(obj, callbackfn) !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-1-12.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-1-12.js
new file mode 100644
index 0000000000..2bb5c20495
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-1-12.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: Array.prototype.some applied to RegExp object
+---*/
+
+function callbackfn(val, idx, obj) {
+  return obj instanceof RegExp;
+}
+
+var obj = new RegExp();
+obj.length = 2;
+obj[0] = 11;
+obj[1] = 9;
+
+assert(Array.prototype.some.call(obj, callbackfn), 'Array.prototype.some.call(obj, callbackfn) !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-1-13.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-1-13.js
new file mode 100644
index 0000000000..7bd579c7c2
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-1-13.js
@@ -0,0 +1,18 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: Array.prototype.some applied to the JSON object
+---*/
+
+function callbackfn(val, idx, obj) {
+  return '[object JSON]' === Object.prototype.toString.call(obj);
+}
+
+JSON.length = 1;
+JSON[0] = 1;
+
+assert(Array.prototype.some.call(JSON, callbackfn), 'Array.prototype.some.call(JSON, callbackfn) !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-1-14.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-1-14.js
new file mode 100644
index 0000000000..850951cfa6
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-1-14.js
@@ -0,0 +1,19 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: Array.prototype.some applied to Error object
+---*/
+
+function callbackfn(val, idx, obj) {
+  return obj instanceof Error;
+}
+
+var obj = new Error();
+obj.length = 1;
+obj[0] = 1;
+
+assert(Array.prototype.some.call(obj, callbackfn), 'Array.prototype.some.call(obj, callbackfn) !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-1-15.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-1-15.js
new file mode 100644
index 0000000000..0a32218628
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-1-15.js
@@ -0,0 +1,19 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: Array.prototype.some applied to the Arguments object
+---*/
+
+function callbackfn(val, idx, obj) {
+  return '[object Arguments]' === Object.prototype.toString.call(obj);
+}
+
+var obj = (function() {
+  return arguments;
+}("a", "b"));
+
+assert(Array.prototype.some.call(obj, callbackfn), 'Array.prototype.some.call(obj, callbackfn) !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-1-2.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-1-2.js
new file mode 100644
index 0000000000..872b8fc793
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-1-2.js
@@ -0,0 +1,14 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: Array.prototype.some applied to null throws a TypeError
+---*/
+
+
+assert.throws(TypeError, function() {
+  Array.prototype.some.call(null);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-1-3.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-1-3.js
new file mode 100644
index 0000000000..761a480f82
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-1-3.js
@@ -0,0 +1,18 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: Array.prototype.some applied to boolean primitive
+---*/
+
+function callbackfn(val, idx, obj) {
+  return obj instanceof Boolean;
+}
+
+Boolean.prototype[0] = 1;
+Boolean.prototype.length = 1;
+
+assert(Array.prototype.some.call(false, callbackfn), 'Array.prototype.some.call(false, callbackfn) !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-1-4.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-1-4.js
new file mode 100644
index 0000000000..4f71153265
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-1-4.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: Array.prototype.some applied to Boolean object
+---*/
+
+function callbackfn(val, idx, obj) {
+  return obj instanceof Boolean;
+}
+
+var obj = new Boolean(true);
+obj.length = 2;
+obj[0] = 11;
+obj[1] = 9;
+
+assert(Array.prototype.some.call(obj, callbackfn), 'Array.prototype.some.call(obj, callbackfn) !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-1-5.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-1-5.js
new file mode 100644
index 0000000000..883b2f1f9d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-1-5.js
@@ -0,0 +1,18 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: Array.prototype.some applied to number primitive
+---*/
+
+function callbackfn(val, idx, obj) {
+  return obj instanceof Number;
+}
+
+Number.prototype[1] = true;
+Number.prototype.length = 2;
+
+assert(Array.prototype.some.call(5, callbackfn), 'Array.prototype.some.call(5, callbackfn) !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-1-6.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-1-6.js
new file mode 100644
index 0000000000..9b1063d799
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-1-6.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: Array.prototype.some applied to Number object
+---*/
+
+function callbackfn(val, idx, obj) {
+  return obj instanceof Number;
+}
+
+var obj = new Number(-128);
+obj.length = 2;
+obj[0] = 11;
+obj[1] = 9;
+
+assert(Array.prototype.some.call(obj, callbackfn), 'Array.prototype.some.call(obj, callbackfn) !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-1-7.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-1-7.js
new file mode 100644
index 0000000000..39ddced1e0
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-1-7.js
@@ -0,0 +1,15 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: Array.prototype.some applied to applied to string primitive
+---*/
+
+function callbackfn(val, idx, obj) {
+  return obj instanceof String;
+}
+
+assert(Array.prototype.some.call("hello\nw_orld\\!", callbackfn), 'Array.prototype.some.call("hello\nw_orld\\!", callbackfn) !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-1-8.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-1-8.js
new file mode 100644
index 0000000000..4fa6c5b17e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-1-8.js
@@ -0,0 +1,17 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: Array.prototype.some applied to String object
+---*/
+
+function callbackfn(val, idx, obj) {
+  return obj instanceof String;
+}
+
+var obj = new String("hello\nw_orld\\!");
+
+assert(Array.prototype.some.call(obj, callbackfn), 'Array.prototype.some.call(obj, callbackfn) !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-1-9.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-1-9.js
new file mode 100644
index 0000000000..ecdf02f662
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-1-9.js
@@ -0,0 +1,21 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: Array.prototype.some applied to Function object
+---*/
+
+function callbackfn(val, idx, obj) {
+  return obj instanceof Function;
+}
+
+var obj = function(a, b) {
+  return a + b;
+};
+obj[0] = 11;
+obj[1] = 9;
+
+assert(Array.prototype.some.call(obj, callbackfn), 'Array.prototype.some.call(obj, callbackfn) !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-2-1.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-2-1.js
new file mode 100644
index 0000000000..fc7877d8dd
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-2-1.js
@@ -0,0 +1,29 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some - 'length' is own data property on an
+    Array-like object
+---*/
+
+function callbackfn1(val, idx, obj) {
+  return val > 10;
+}
+
+function callbackfn2(val, idx, obj) {
+  return val > 11;
+}
+
+var obj = {
+  0: 9,
+  1: 11,
+  2: 12,
+  length: 2
+};
+
+assert(Array.prototype.some.call(obj, callbackfn1), 'Array.prototype.some.call(obj, callbackfn1) !== true');
+assert.sameValue(Array.prototype.some.call(obj, callbackfn2), false, 'Array.prototype.some.call(obj, callbackfn2)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-2-10.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-2-10.js
new file mode 100644
index 0000000000..3abc58824f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-2-10.js
@@ -0,0 +1,39 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some - 'length' is an inherited accessor property
+    on an Array-like object
+---*/
+
+function callbackfn1(val, idx, obj) {
+  return val > 10;
+}
+
+function callbackfn2(val, idx, obj) {
+  return val > 11;
+}
+
+var proto = {};
+
+Object.defineProperty(proto, "length", {
+  get: function() {
+    return 2;
+  },
+  configurable: true
+});
+
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+child[0] = 9;
+child[1] = 11;
+child[2] = 12;
+
+assert(Array.prototype.some.call(child, callbackfn1), 'Array.prototype.some.call(child, callbackfn1) !== true');
+assert.sameValue(Array.prototype.some.call(child, callbackfn2), false, 'Array.prototype.some.call(child, callbackfn2)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-2-11.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-2-11.js
new file mode 100644
index 0000000000..12d7578ef8
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-2-11.js
@@ -0,0 +1,30 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some - 'length' is an own accessor property
+    without a get function on an Array-like object
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return val > 10;
+}
+
+var obj = {
+  0: 11,
+  1: 12
+};
+Object.defineProperty(obj, "length", {
+  set: function() {},
+  configurable: true
+});
+
+assert.sameValue(Array.prototype.some.call(obj, callbackfn), false, 'Array.prototype.some.call(obj, callbackfn)');
+assert.sameValue(accessed, false, 'accessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-2-12.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-2-12.js
new file mode 100644
index 0000000000..43f3078273
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-2-12.js
@@ -0,0 +1,38 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some - 'length' is own accessor property without a
+    get function that overrides an inherited accessor property on an
+    Array-like object
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return val > 10;
+}
+
+Object.defineProperty(Object.prototype, "length", {
+  get: function() {
+    return 2;
+  },
+  configurable: true
+});
+
+var obj = {
+  0: 11,
+  1: 12
+};
+Object.defineProperty(obj, "length", {
+  set: function() {},
+  configurable: true
+});
+
+assert.sameValue(Array.prototype.some.call(obj, callbackfn), false, 'Array.prototype.some.call(obj, callbackfn)');
+assert.sameValue(accessed, false, 'accessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-2-13.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-2-13.js
new file mode 100644
index 0000000000..3afc23e399
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-2-13.js
@@ -0,0 +1,34 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some - 'length' is inherited accessor property
+    without a get function on an Array-like object
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return val > 10;
+}
+
+var proto = {};
+Object.defineProperty(proto, "length", {
+  set: function() {},
+  configurable: true
+});
+
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+child[0] = 11;
+child[1] = 12;
+
+assert.sameValue(Array.prototype.some.call(child, callbackfn), false, 'Array.prototype.some.call(child, callbackfn)');
+assert.sameValue(accessed, false, 'accessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-2-14.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-2-14.js
new file mode 100644
index 0000000000..ba200008dc
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-2-14.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some - 'length' property doesn't exist on an
+    Array-like object
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return val > 10;
+}
+
+var obj = {
+  0: 11,
+  1: 12
+};
+
+assert.sameValue(Array.prototype.some.call(obj, callbackfn), false, 'Array.prototype.some.call(obj, callbackfn)');
+assert.sameValue(accessed, false, 'accessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-2-17.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-2-17.js
new file mode 100644
index 0000000000..9a17b8b8df
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-2-17.js
@@ -0,0 +1,27 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some applied to the Arguments object which
+    implements its own property get method
+---*/
+
+function callbackfn1(val, idx, obj) {
+  return val > 10;
+}
+
+function callbackfn2(val, idx, obj) {
+  return val > 11;
+}
+
+var func = function(a, b) {
+  arguments[2] = 12;
+  return Array.prototype.some.call(arguments, callbackfn1) &&
+    !Array.prototype.some.call(arguments, callbackfn2);
+};
+
+assert(func(9, 11), 'func(9, 11) !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-2-18.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-2-18.js
new file mode 100644
index 0000000000..72e6722f18
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-2-18.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some applied to String object which implements its
+    own property get method
+---*/
+
+function callbackfn1(val, idx, obj) {
+  return parseInt(val, 10) > 1;
+}
+
+function callbackfn2(val, idx, obj) {
+  return parseInt(val, 10) > 2;
+}
+
+var str = new String("12");
+
+String.prototype[2] = "3";
+
+assert(Array.prototype.some.call(str, callbackfn1), 'Array.prototype.some.call(str, callbackfn1) !== true');
+assert.sameValue(Array.prototype.some.call(str, callbackfn2), false, 'Array.prototype.some.call(str, callbackfn2)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-2-19.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-2-19.js
new file mode 100644
index 0000000000..671ec1f38e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-2-19.js
@@ -0,0 +1,29 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some applied to Function object which implements
+    its own property get method
+---*/
+
+function callbackfn1(val, idx, obj) {
+  return val > 10;
+}
+
+function callbackfn2(val, idx, obj) {
+  return val > 11;
+}
+
+var fun = function(a, b) {
+  return a + b;
+};
+fun[0] = 9;
+fun[1] = 11;
+fun[2] = 12;
+
+assert(Array.prototype.some.call(fun, callbackfn1), 'Array.prototype.some.call(fun, callbackfn1) !== true');
+assert.sameValue(Array.prototype.some.call(fun, callbackfn2), false, 'Array.prototype.some.call(fun, callbackfn2)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-2-2.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-2-2.js
new file mode 100644
index 0000000000..ceeb9d14a0
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-2-2.js
@@ -0,0 +1,22 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: Array.prototype.some - 'length' is own data property on an Array
+---*/
+
+function callbackfn1(val, idx, obj) {
+  return val > 10;
+}
+
+function callbackfn2(val, idx, obj) {
+  return val > 11;
+}
+
+Array.prototype[2] = 12;
+
+assert([9, 11].some(callbackfn1), '[9, 11].some(callbackfn1) !== true');
+assert.sameValue([9, 11].some(callbackfn2), false, '[9, 11].some(callbackfn2)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-2-3.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-2-3.js
new file mode 100644
index 0000000000..bcd898d5d8
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-2-3.js
@@ -0,0 +1,35 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some - 'length' is an own data property that
+    overrides an inherited data property on an Array-like object
+---*/
+
+function callbackfn1(val, idx, obj) {
+  return val > 10;
+}
+
+function callbackfn2(val, idx, obj) {
+  return val > 11;
+}
+
+var proto = {
+  length: 3
+};
+
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+child.length = 2;
+child[0] = 9;
+child[1] = 11;
+child[2] = 12;
+
+assert(Array.prototype.some.call(child, callbackfn1), 'Array.prototype.some.call(child, callbackfn1) !== true');
+assert.sameValue(Array.prototype.some.call(child, callbackfn2), false, 'Array.prototype.some.call(child, callbackfn2)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-2-4.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-2-4.js
new file mode 100644
index 0000000000..b1ec0481e3
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-2-4.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some - 'length' is an own data property that
+    overrides an inherited data property on an array
+---*/
+
+var arrProtoLen = 0;
+
+function callbackfn1(val, idx, obj) {
+  return val > 10;
+}
+
+function callbackfn2(val, idx, obj) {
+  return val > 11;
+}
+
+arrProtoLen = Array.prototype.length;
+Array.prototype.length = 0;
+Array.prototype[2] = 12;
+
+assert([9, 11].some(callbackfn1), '[9, 11].some(callbackfn1) !== true');
+assert.sameValue([9, 11].some(callbackfn2), false, '[9, 11].some(callbackfn2)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-2-5.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-2-5.js
new file mode 100644
index 0000000000..6c2554aea9
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-2-5.js
@@ -0,0 +1,44 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some - 'length' is an own data property that
+    overrides an inherited accessor property on an Array-like object
+---*/
+
+function callbackfn1(val, idx, obj) {
+  return val > 10;
+}
+
+function callbackfn2(val, idx, obj) {
+  return val > 11;
+}
+
+var proto = {};
+
+Object.defineProperty(proto, "length", {
+  get: function() {
+    return 3;
+  },
+  configurable: true
+});
+
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+Object.defineProperty(child, "length", {
+  value: 2,
+  configurable: true
+});
+
+child[0] = 9;
+child[1] = 11;
+child[2] = 12;
+
+assert(Array.prototype.some.call(child, callbackfn1), 'Array.prototype.some.call(child, callbackfn1) !== true');
+assert.sameValue(Array.prototype.some.call(child, callbackfn2), false, 'Array.prototype.some.call(child, callbackfn2)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-2-6.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-2-6.js
new file mode 100644
index 0000000000..d4341c375d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-2-6.js
@@ -0,0 +1,34 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some - 'length' is an inherited data property on
+    an Array-like object
+---*/
+
+function callbackfn1(val, idx, obj) {
+  return val > 10;
+}
+
+function callbackfn2(val, idx, obj) {
+  return val > 11;
+}
+
+var proto = {
+  length: 2
+};
+
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+child[0] = 9;
+child[1] = 11;
+child[2] = 12;
+
+assert(Array.prototype.some.call(child, callbackfn1), 'Array.prototype.some.call(child, callbackfn1) !== true');
+assert.sameValue(Array.prototype.some.call(child, callbackfn2), false, 'Array.prototype.some.call(child, callbackfn2)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-2-7.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-2-7.js
new file mode 100644
index 0000000000..dec4139f90
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-2-7.js
@@ -0,0 +1,35 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some - 'length' is an own accessor property on an
+    Array-like object
+---*/
+
+function callbackfn1(val, idx, obj) {
+  return val > 10;
+}
+
+function callbackfn2(val, idx, obj) {
+  return val > 11;
+}
+
+var obj = {};
+
+Object.defineProperty(obj, "length", {
+  get: function() {
+    return 2;
+  },
+  configurable: true
+});
+
+obj[0] = 9;
+obj[1] = 11;
+obj[2] = 12;
+
+assert(Array.prototype.some.call(obj, callbackfn1), 'Array.prototype.some.call(obj, callbackfn1) !== true');
+assert.sameValue(Array.prototype.some.call(obj, callbackfn2), false, 'Array.prototype.some.call(obj, callbackfn2)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-2-8.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-2-8.js
new file mode 100644
index 0000000000..80fbd84219
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-2-8.js
@@ -0,0 +1,42 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some - 'length' is an own accessor property that
+    overrides an inherited data property on an Array-like object
+---*/
+
+function callbackfn1(val, idx, obj) {
+  return val > 10;
+}
+
+function callbackfn2(val, idx, obj) {
+  return val > 11;
+}
+
+var proto = {
+  length: 3
+};
+
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+
+Object.defineProperty(child, "length", {
+  get: function() {
+    return 2;
+  },
+  configurable: true
+});
+
+child[0] = 9;
+child[1] = 11;
+child[2] = 12;
+
+assert(Array.prototype.some.call(child, callbackfn1), 'Array.prototype.some.call(child, callbackfn1) !== true');
+assert.sameValue(Array.prototype.some.call(child, callbackfn2), false, 'Array.prototype.some.call(child, callbackfn2)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-2-9.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-2-9.js
new file mode 100644
index 0000000000..77c0f4bf25
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-2-9.js
@@ -0,0 +1,47 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some - 'length' is an own accessor property that
+    overrides an inherited accessor property on an Array-like object
+---*/
+
+function callbackfn1(val, idx, obj) {
+  return val > 10;
+}
+
+function callbackfn2(val, idx, obj) {
+  return val > 11;
+}
+
+var proto = {};
+
+Object.defineProperty(proto, "length", {
+  get: function() {
+    return 3;
+  },
+  configurable: true
+});
+
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+
+Object.defineProperty(child, "length", {
+  get: function() {
+    return 2;
+  },
+  configurable: true
+});
+
+child[0] = 9;
+child[1] = 11;
+child[2] = 12;
+
+assert(Array.prototype.some.call(child, callbackfn1), 'Array.prototype.some.call(child, callbackfn1) !== true');
+assert.sameValue(Array.prototype.some.call(child, callbackfn2), false, 'Array.prototype.some.call(child, callbackfn2)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-3-1.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-3-1.js
new file mode 100644
index 0000000000..4015731a97
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-3-1.js
@@ -0,0 +1,24 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: Array.prototype.some - value of 'length' is undefined
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return val > 10;
+}
+
+var obj = {
+  0: 11,
+  length: undefined
+};
+
+assert.sameValue(Array.prototype.some.call(obj, callbackfn), false, 'Array.prototype.some.call(obj, callbackfn)');
+assert.sameValue(accessed, false, 'accessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-3-10.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-3-10.js
new file mode 100644
index 0000000000..fc00017f5b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-3-10.js
@@ -0,0 +1,24 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: Array.prototype.some - value of 'length' is a number (value is NaN)
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return val > 10;
+}
+
+var obj = {
+  0: 11,
+  length: NaN
+};
+
+assert.sameValue(Array.prototype.some.call(obj, callbackfn), false, 'Array.prototype.some.call(obj, callbackfn)');
+assert.sameValue(accessed, false, 'accessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-3-11.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-3-11.js
new file mode 100644
index 0000000000..303735bd8d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-3-11.js
@@ -0,0 +1,29 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some - 'length' is a string containing a positive
+    number
+---*/
+
+function callbackfn1(val, idx, obj) {
+  return val > 10;
+}
+
+function callbackfn2(val, idx, obj) {
+  return val > 11;
+}
+
+var obj = {
+  0: 9,
+  1: 11,
+  2: 12,
+  length: "2"
+};
+
+assert(Array.prototype.some.call(obj, callbackfn1), 'Array.prototype.some.call(obj, callbackfn1) !== true');
+assert.sameValue(Array.prototype.some.call(obj, callbackfn2), false, 'Array.prototype.some.call(obj, callbackfn2)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-3-12.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-3-12.js
new file mode 100644
index 0000000000..cbd6d7ad8b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-3-12.js
@@ -0,0 +1,29 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some - 'length' is a string containing a negative
+    number
+---*/
+
+function callbackfn1(val, idx, obj) {
+  return val > 10;
+}
+
+function callbackfn2(val, idx, obj) {
+  return val > 11;
+}
+
+var obj = {
+  0: 9,
+  1: 11,
+  2: 12,
+  length: "-4294967294"
+};
+
+assert.sameValue(Array.prototype.some.call(obj, callbackfn1), false, 'Array.prototype.some.call(obj, callbackfn1)');
+assert.sameValue(Array.prototype.some.call(obj, callbackfn2), false, 'Array.prototype.some.call(obj, callbackfn2)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-3-13.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-3-13.js
new file mode 100644
index 0000000000..7bd999ab0e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-3-13.js
@@ -0,0 +1,29 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some - 'length' is a string containing a decimal
+    number
+---*/
+
+function callbackfn1(val, idx, obj) {
+  return val > 10;
+}
+
+function callbackfn2(val, idx, obj) {
+  return val > 11;
+}
+
+var obj = {
+  0: 9,
+  1: 11,
+  2: 12,
+  length: "2.5"
+};
+
+assert(Array.prototype.some.call(obj, callbackfn1), 'Array.prototype.some.call(obj, callbackfn1) !== true');
+assert.sameValue(Array.prototype.some.call(obj, callbackfn2), false, 'Array.prototype.some.call(obj, callbackfn2)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-3-14.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-3-14.js
new file mode 100644
index 0000000000..764ae4ffb9
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-3-14.js
@@ -0,0 +1,34 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: Array.prototype.some - 'length' is a string containing +/-Infinity
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return val > 10;
+}
+
+var objOne = {
+  0: 11,
+  length: "Infinity"
+};
+var objTwo = {
+  0: 11,
+  length: "+Infinity"
+};
+var objThree = {
+  0: 11,
+  length: "-Infinity"
+};
+
+assert(Array.prototype.some.call(objOne, callbackfn), 'Array.prototype.some.call(objOne, callbackfn) !== true');
+assert(Array.prototype.some.call(objTwo, callbackfn), 'Array.prototype.some.call(objTwo, callbackfn) !== true');
+assert.sameValue(Array.prototype.some.call(objThree, callbackfn), false, 'Array.prototype.some.call(objThree, callbackfn)');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-3-15.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-3-15.js
new file mode 100644
index 0000000000..cf74a9a739
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-3-15.js
@@ -0,0 +1,29 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some - 'length' is a string containing an
+    exponential number
+---*/
+
+function callbackfn1(val, idx, obj) {
+  return val > 10;
+}
+
+function callbackfn2(val, idx, obj) {
+  return val > 11;
+}
+
+var obj = {
+  0: 9,
+  1: 11,
+  2: 12,
+  length: "2E0"
+};
+
+assert(Array.prototype.some.call(obj, callbackfn1), 'Array.prototype.some.call(obj, callbackfn1) !== true');
+assert.sameValue(Array.prototype.some.call(obj, callbackfn2), false, 'Array.prototype.some.call(obj, callbackfn2)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-3-16.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-3-16.js
new file mode 100644
index 0000000000..6619ada436
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-3-16.js
@@ -0,0 +1,27 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: Array.prototype.some - 'length' is a string containing a hex number
+---*/
+
+function callbackfn1(val, idx, obj) {
+  return val > 10;
+}
+
+function callbackfn2(val, idx, obj) {
+  return val > 11;
+}
+
+var obj = {
+  0: 9,
+  1: 11,
+  2: 12,
+  length: "0x0002"
+};
+
+assert(Array.prototype.some.call(obj, callbackfn1), 'Array.prototype.some.call(obj, callbackfn1) !== true');
+assert.sameValue(Array.prototype.some.call(obj, callbackfn2), false, 'Array.prototype.some.call(obj, callbackfn2)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-3-17.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-3-17.js
new file mode 100644
index 0000000000..9d8840e640
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-3-17.js
@@ -0,0 +1,29 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some - 'length' is a string containing a number
+    with leading zeros
+---*/
+
+function callbackfn1(val, idx, obj) {
+  return val > 10;
+}
+
+function callbackfn2(val, idx, obj) {
+  return val > 11;
+}
+
+var obj = {
+  0: 9,
+  1: 11,
+  2: 12,
+  length: "0002.00"
+};
+
+assert(Array.prototype.some.call(obj, callbackfn1), 'Array.prototype.some.call(obj, callbackfn1) !== true');
+assert.sameValue(Array.prototype.some.call(obj, callbackfn2), false, 'Array.prototype.some.call(obj, callbackfn2)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-3-18.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-3-18.js
new file mode 100644
index 0000000000..5f6e71fa33
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-3-18.js
@@ -0,0 +1,27 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some - value of 'length' is a string that can't
+    convert to a number
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return val > 10;
+}
+
+var obj = {
+  0: 11,
+  1: 21,
+  length: "two"
+};
+
+assert.sameValue(Array.prototype.some.call(obj, callbackfn), false, 'Array.prototype.some.call(obj, callbackfn)');
+assert.sameValue(accessed, false, 'accessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-3-19.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-3-19.js
new file mode 100644
index 0000000000..cf67025184
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-3-19.js
@@ -0,0 +1,37 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some - value of 'length' is an Object which has an
+    own toString method
+---*/
+
+function callbackfn1(val, idx, obj) {
+  return val > 10;
+}
+
+function callbackfn2(val, idx, obj) {
+  return val > 11;
+}
+
+var toStringAccessed = false;
+var obj = {
+  0: 9,
+  1: 11,
+  2: 12,
+
+  length: {
+    toString: function() {
+      toStringAccessed = true;
+      return '2';
+    }
+  }
+};
+
+assert(Array.prototype.some.call(obj, callbackfn1), 'Array.prototype.some.call(obj, callbackfn1) !== true');
+assert.sameValue(Array.prototype.some.call(obj, callbackfn2), false, 'Array.prototype.some.call(obj, callbackfn2)');
+assert(toStringAccessed, 'toStringAccessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-3-2.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-3-2.js
new file mode 100644
index 0000000000..0feb782ac7
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-3-2.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some on an Array-like object if 'length' is 1
+    (length overridden to true(type conversion))
+---*/
+
+function callbackfn1(val, idx, obj) {
+  return val > 10;
+}
+
+function callbackfn2(val, idx, obj) {
+  return val > 11;
+}
+
+var obj = {
+  0: 11,
+  1: 12,
+  length: true
+};
+
+assert(Array.prototype.some.call(obj, callbackfn1), 'Array.prototype.some.call(obj, callbackfn1) !== true');
+assert.sameValue(Array.prototype.some.call(obj, callbackfn2), false, 'Array.prototype.some.call(obj, callbackfn2)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-3-20.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-3-20.js
new file mode 100644
index 0000000000..515a4eecd0
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-3-20.js
@@ -0,0 +1,37 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some - value of 'length' is an Object which has an
+    own valueOf method
+---*/
+
+function callbackfn1(val, idx, obj) {
+  return val > 10;
+}
+
+function callbackfn2(val, idx, obj) {
+  return val > 11;
+}
+
+var valueOfAccessed = false;
+
+var obj = {
+  0: 9,
+  1: 11,
+  2: 12,
+  length: {
+    valueOf: function() {
+      valueOfAccessed = true;
+      return 2;
+    }
+  }
+};
+
+assert(Array.prototype.some.call(obj, callbackfn1), 'Array.prototype.some.call(obj, callbackfn1) !== true');
+assert.sameValue(Array.prototype.some.call(obj, callbackfn2), false, 'Array.prototype.some.call(obj, callbackfn2)');
+assert(valueOfAccessed, 'valueOfAccessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-3-21.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-3-21.js
new file mode 100644
index 0000000000..e3304b7f40
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-3-21.js
@@ -0,0 +1,44 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some - 'length' is an object that has an own
+    valueOf method that returns an object and toString method that
+    returns a string
+---*/
+
+function callbackfn1(val, idx, obj) {
+  return val > 10;
+}
+
+function callbackfn2(val, idx, obj) {
+  return val > 11;
+}
+
+var toStringAccessed = false;
+var valueOfAccessed = false;
+
+var obj = {
+  0: 9,
+  1: 11,
+  2: 12,
+  length: {
+    valueOf: function() {
+      valueOfAccessed = true;
+      return {};
+    },
+    toString: function() {
+      toStringAccessed = true;
+      return '2';
+    }
+  }
+};
+
+assert(Array.prototype.some.call(obj, callbackfn1), 'Array.prototype.some.call(obj, callbackfn1) !== true');
+assert.sameValue(Array.prototype.some.call(obj, callbackfn2), false, 'Array.prototype.some.call(obj, callbackfn2)');
+assert(valueOfAccessed, 'valueOfAccessed !== true');
+assert(toStringAccessed, 'toStringAccessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-3-22.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-3-22.js
new file mode 100644
index 0000000000..1e1fb06e59
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-3-22.js
@@ -0,0 +1,43 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some throws TypeError exception when 'length' is
+    an object with toString and valueOf methods that don�t return
+    primitive values
+---*/
+
+var callbackfnAccessed = false;
+var toStringAccessed = false;
+var valueOfAccessed = false;
+
+function callbackfn(val, idx, obj) {
+  callbackfnAccessed = true;
+  return val > 10;
+}
+
+var obj = {
+  0: 11,
+  1: 12,
+
+  length: {
+    valueOf: function() {
+      valueOfAccessed = true;
+      return {};
+    },
+    toString: function() {
+      toStringAccessed = true;
+      return {};
+    }
+  }
+};
+assert.throws(TypeError, function() {
+  Array.prototype.some.call(obj, callbackfn);
+});
+assert(toStringAccessed, 'toStringAccessed !== true');
+assert(valueOfAccessed, 'valueOfAccessed !== true');
+assert.sameValue(callbackfnAccessed, false, 'callbackfnAccessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-3-23.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-3-23.js
new file mode 100644
index 0000000000..3bb1bb83b4
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-3-23.js
@@ -0,0 +1,51 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some uses inherited valueOf method when 'length'
+    is an object with an own toString and inherited valueOf methods
+---*/
+
+function callbackfn1(val, idx, obj) {
+  return val > 10;
+}
+
+function callbackfn2(val, idx, obj) {
+  return val > 11;
+}
+
+var valueOfAccessed = false;
+var toStringAccessed = false;
+
+var proto = {
+  valueOf: function() {
+    valueOfAccessed = true;
+    return 2;
+  }
+};
+
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+
+child.toString = function() {
+  toStringAccessed = true;
+  return '1';
+};
+
+var obj = {
+  0: 9,
+  1: 11,
+  2: 12,
+  length: child
+};
+
+assert(Array.prototype.some.call(obj, callbackfn1), 'Array.prototype.some.call(obj, callbackfn1) !== true');
+assert.sameValue(Array.prototype.some.call(obj, callbackfn2), false, 'Array.prototype.some.call(obj, callbackfn2)');
+assert(valueOfAccessed, 'valueOfAccessed !== true');
+assert.sameValue(toStringAccessed, false, 'toStringAccessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-3-24.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-3-24.js
new file mode 100644
index 0000000000..3d85a9f805
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-3-24.js
@@ -0,0 +1,29 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some - value of 'length' is a positive
+    non-integer, ensure truncation occurs in the proper direction
+---*/
+
+function callbackfn1(val, idx, obj) {
+  return val > 10;
+}
+
+function callbackfn2(val, idx, obj) {
+  return val > 11;
+}
+
+var obj = {
+  0: 9,
+  10: 11,
+  11: 12,
+  length: 11.5
+};
+
+assert(Array.prototype.some.call(obj, callbackfn1), 'Array.prototype.some.call(obj, callbackfn1) !== true');
+assert.sameValue(Array.prototype.some.call(obj, callbackfn2), false, 'Array.prototype.some.call(obj, callbackfn2)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-3-25.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-3-25.js
new file mode 100644
index 0000000000..03c16578b7
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-3-25.js
@@ -0,0 +1,27 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: Array.prototype.some - value of 'length' is a negative non-integer
+---*/
+
+function callbackfn1(val, idx, obj) {
+  return val > 10;
+}
+
+function callbackfn2(val, idx, obj) {
+  return val > 11;
+}
+
+var obj = {
+  0: 9,
+  1: 11,
+  2: 12,
+  length: -4294967294.5
+};
+
+assert.sameValue(Array.prototype.some.call(obj, callbackfn1), false, 'Array.prototype.some.call(obj, callbackfn1)');
+assert.sameValue(Array.prototype.some.call(obj, callbackfn2), false, 'Array.prototype.some.call(obj, callbackfn2)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-3-28.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-3-28.js
new file mode 100644
index 0000000000..92e292cbd9
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-3-28.js
@@ -0,0 +1,24 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: Array.prototype.some - value of 'length' is boundary value (2^32)
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return val > 10;
+}
+
+var obj = {
+  0: 12,
+  length: 4294967296
+};
+
+assert(Array.prototype.some.call(obj, callbackfn), 'Array.prototype.some.call(obj, callbackfn) !== true');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-3-29.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-3-29.js
new file mode 100644
index 0000000000..c3d0cd6c79
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-3-29.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some - value of 'length' is boundary value (2^32 +
+    1)
+---*/
+
+function callbackfn1(val, idx, obj) {
+  return val > 10;
+}
+
+function callbackfn2(val, idx, obj) {
+  return val > 11;
+}
+
+var obj = {
+  0: 11,
+  1: 12,
+  length: 4294967297
+};
+
+assert(Array.prototype.some.call(obj, callbackfn1), 'Array.prototype.some.call(obj, callbackfn1) !== true');
+assert(Array.prototype.some.call(obj, callbackfn2), 'Array.prototype.some.call(obj, callbackfn2) !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-3-3.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-3-3.js
new file mode 100644
index 0000000000..0010be28c8
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-3-3.js
@@ -0,0 +1,24 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: Array.prototype.some - value of 'length' is a number (value is 0)
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return val > 10;
+}
+
+var obj = {
+  0: 11,
+  length: 0
+};
+
+assert.sameValue(Array.prototype.some.call(obj, callbackfn), false, 'Array.prototype.some.call(obj, callbackfn)');
+assert.sameValue(accessed, false, 'accessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-3-4.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-3-4.js
new file mode 100644
index 0000000000..94e4e0874c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-3-4.js
@@ -0,0 +1,24 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: Array.prototype.some - value of 'length' is a number (value is +0)
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return val > 10;
+}
+
+var obj = {
+  0: 11,
+  length: +0
+};
+
+assert.sameValue(Array.prototype.some.call(obj, callbackfn), false, 'Array.prototype.some.call(obj, callbackfn)');
+assert.sameValue(accessed, false, 'accessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-3-5.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-3-5.js
new file mode 100644
index 0000000000..0edb95879b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-3-5.js
@@ -0,0 +1,24 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: Array.prototype.some - value of 'length' is a number (value is -0)
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return val > 10;
+}
+
+var obj = {
+  0: 11,
+  length: -0
+};
+
+assert.sameValue(Array.prototype.some.call(obj, callbackfn), false, 'Array.prototype.some.call(obj, callbackfn)');
+assert.sameValue(accessed, false, 'accessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-3-6.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-3-6.js
new file mode 100644
index 0000000000..0d0986a6cd
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-3-6.js
@@ -0,0 +1,29 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some - value of 'length' is a number (value is
+    positive)
+---*/
+
+function callbackfn1(val, idx, obj) {
+  return val > 10;
+}
+
+function callbackfn2(val, idx, obj) {
+  return val > 11;
+}
+
+var obj = {
+  0: 9,
+  1: 11,
+  2: 12,
+  length: 2
+};
+
+assert(Array.prototype.some.call(obj, callbackfn1), 'Array.prototype.some.call(obj, callbackfn1) !== true');
+assert.sameValue(Array.prototype.some.call(obj, callbackfn2), false, 'Array.prototype.some.call(obj, callbackfn2)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-3-7.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-3-7.js
new file mode 100644
index 0000000000..4a37d62b83
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-3-7.js
@@ -0,0 +1,29 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some - value of 'length' is a number (value is
+    negative)
+---*/
+
+function callbackfn1(val, idx, obj) {
+  return val > 10;
+}
+
+function callbackfn2(val, idx, obj) {
+  return val > 11;
+}
+
+var obj = {
+  0: 9,
+  1: 11,
+  2: 12,
+  length: -4294967294
+};
+
+assert.sameValue(Array.prototype.some.call(obj, callbackfn1), false, 'Array.prototype.some.call(obj, callbackfn1)');
+assert.sameValue(Array.prototype.some.call(obj, callbackfn2), false, 'Array.prototype.some.call(obj, callbackfn2)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-3-8.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-3-8.js
new file mode 100644
index 0000000000..2d8a0f93e7
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-3-8.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some - value of 'length' is a number (value is
+    Infinity)
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return val > 10;
+}
+
+var obj = {
+  0: 11,
+  length: Infinity
+};
+
+assert(Array.prototype.some.call(obj, callbackfn), 'Array.prototype.some.call(obj, callbackfn) !== true');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-3-9.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-3-9.js
new file mode 100644
index 0000000000..81f18d7fbf
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-3-9.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some - value of 'length' is a number (value is
+    -Infinity)
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return val > 10;
+}
+
+var obj = {
+  0: 11,
+  length: -Infinity
+};
+
+assert.sameValue(Array.prototype.some.call(obj, callbackfn), false, 'Array.prototype.some.call(obj, callbackfn)');
+assert.sameValue(accessed, false, 'accessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-4-1.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-4-1.js
new file mode 100644
index 0000000000..acbceed9ea
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-4-1.js
@@ -0,0 +1,14 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: Array.prototype.some throws TypeError if callbackfn is undefined
+---*/
+
+var arr = new Array(10);
+assert.throws(TypeError, function() {
+  arr.some();
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-4-10.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-4-10.js
new file mode 100644
index 0000000000..c5cd6f4ada
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-4-10.js
@@ -0,0 +1,27 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some - the exception is not thrown if exception
+    was thrown by step 2
+---*/
+
+var obj = {
+  0: 11,
+  1: 12
+};
+
+Object.defineProperty(obj, "length", {
+  get: function() {
+    throw new Test262Error();
+  },
+  configurable: true
+});
+
+assert.throws(Test262Error, function() {
+  Array.prototype.some.call(obj, undefined);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-4-11.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-4-11.js
new file mode 100644
index 0000000000..c16b34b426
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-4-11.js
@@ -0,0 +1,31 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some - the exception is not thrown if exception
+    was thrown by step 3
+---*/
+
+var obj = {
+  0: 11,
+  1: 12
+};
+
+Object.defineProperty(obj, "length", {
+  get: function() {
+    return {
+      toString: function() {
+        throw new Test262Error();
+      }
+    };
+  },
+  configurable: true
+});
+
+assert.throws(Test262Error, function() {
+  Array.prototype.some.call(obj, undefined);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-4-12.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-4-12.js
new file mode 100644
index 0000000000..f46e6e6d32
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-4-12.js
@@ -0,0 +1,15 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: Array.prototype.some - 'callbackfn' is a function
+---*/
+
+function callbackfn(val, idx, obj) {
+  return val > 10;
+}
+
+assert([9, 11].some(callbackfn), '[9, 11].some(callbackfn) !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-4-15.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-4-15.js
new file mode 100644
index 0000000000..d035704277
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-4-15.js
@@ -0,0 +1,35 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some - calling with no callbackfn is the same as
+    passing undefined for callbackfn
+---*/
+
+var obj = {};
+var lengthAccessed = false;
+var loopAccessed = false;
+
+Object.defineProperty(obj, "length", {
+  get: function() {
+    lengthAccessed = true;
+    return 20;
+  },
+  configurable: true
+});
+Object.defineProperty(obj, "0", {
+  get: function() {
+    loopAccessed = true;
+    return 10;
+  },
+  configurable: true
+});
+assert.throws(TypeError, function() {
+  Array.prototype.some.call(obj);
+});
+assert(lengthAccessed, 'lengthAccessed !== true');
+assert.sameValue(loopAccessed, false, 'loopAccessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-4-2.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-4-2.js
new file mode 100644
index 0000000000..699b64dbe9
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-4-2.js
@@ -0,0 +1,16 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some throws ReferenceError if callbackfn is
+    unreferenced
+---*/
+
+var arr = new Array(10);
+assert.throws(ReferenceError, function() {
+  arr.some(foo);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-4-3.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-4-3.js
new file mode 100644
index 0000000000..27353996cc
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-4-3.js
@@ -0,0 +1,14 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: Array.prototype.some throws TypeError if callbackfn is null
+---*/
+
+var arr = new Array(10);
+assert.throws(TypeError, function() {
+  arr.some(null);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-4-4.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-4-4.js
new file mode 100644
index 0000000000..adafd8b5fd
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-4-4.js
@@ -0,0 +1,14 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: Array.prototype.some throws TypeError if callbackfn is boolean
+---*/
+
+var arr = new Array(10);
+assert.throws(TypeError, function() {
+  arr.some(true);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-4-5.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-4-5.js
new file mode 100644
index 0000000000..d91212aa73
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-4-5.js
@@ -0,0 +1,14 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: Array.prototype.some throws TypeError if callbackfn is number
+---*/
+
+var arr = new Array(10);
+assert.throws(TypeError, function() {
+  arr.some(5);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-4-6.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-4-6.js
new file mode 100644
index 0000000000..7fa20de79a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-4-6.js
@@ -0,0 +1,14 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: Array.prototype.some throws TypeError if callbackfn is string
+---*/
+
+var arr = new Array(10);
+assert.throws(TypeError, function() {
+  arr.some("abc");
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-4-7.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-4-7.js
new file mode 100644
index 0000000000..984967efd3
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-4-7.js
@@ -0,0 +1,16 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some throws TypeError if callbackfn is Object
+    without a Call internal method
+---*/
+
+var arr = new Array(10);
+assert.throws(TypeError, function() {
+  arr.some(new Object());
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-4-8.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-4-8.js
new file mode 100644
index 0000000000..dacb5ceeff
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-4-8.js
@@ -0,0 +1,30 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some - side effects produced by step 2 are visible
+    when an exception occurs
+---*/
+
+var obj = {
+  0: 11,
+  1: 12
+};
+
+var accessed = false;
+
+Object.defineProperty(obj, "length", {
+  get: function() {
+    accessed = true;
+    return 2;
+  },
+  configurable: true
+});
+assert.throws(TypeError, function() {
+  Array.prototype.some.call(obj, null);
+});
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-4-9.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-4-9.js
new file mode 100644
index 0000000000..c2be0a88e5
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-4-9.js
@@ -0,0 +1,34 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some - side effects produced by step 3 are visible
+    when an exception occurs
+---*/
+
+var obj = {
+  0: 11,
+  1: 12
+};
+
+var accessed = false;
+
+Object.defineProperty(obj, "length", {
+  get: function() {
+    return {
+      toString: function() {
+        accessed = true;
+        return "2";
+      }
+    };
+  },
+  configurable: true
+});
+assert.throws(TypeError, function() {
+  Array.prototype.some.call(obj, null);
+});
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-5-1-s.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-5-1-s.js
new file mode 100644
index 0000000000..68f7c486da
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-5-1-s.js
@@ -0,0 +1,22 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: Array.prototype.some - thisArg not passed to strict callbackfn
+flags: [noStrict]
+---*/
+
+var innerThisCorrect = false;
+
+function callbackfn(val, idx, obj) {
+  "use strict";
+  innerThisCorrect = this === undefined;
+  return true;
+}
+
+[1].some(callbackfn);
+
+assert(innerThisCorrect, 'innerThisCorrect !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-5-1.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-5-1.js
new file mode 100644
index 0000000000..2f2d023f00
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-5-1.js
@@ -0,0 +1,22 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: Array.prototype.some - thisArg is passed
+flags: [noStrict]
+---*/
+
+(function() {
+  this._15_4_4_17_5_1 = false;
+  var _15_4_4_17_5_1 = true;
+
+  function callbackfn(val, idx, obj) {
+    return this._15_4_4_17_5_1;
+  }
+  var arr = [1];
+
+  assert.sameValue(arr.some(callbackfn), false, 'arr.some(callbackfn)');
+})();
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-5-10.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-5-10.js
new file mode 100644
index 0000000000..b01d637de6
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-5-10.js
@@ -0,0 +1,17 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: Array.prototype.some - Array Object can be used as thisArg
+---*/
+
+var objArray = [];
+
+function callbackfn(val, idx, obj) {
+  return this === objArray;
+}
+
+assert([11].some(callbackfn, objArray), '[11].some(callbackfn, objArray) !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-5-11.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-5-11.js
new file mode 100644
index 0000000000..a13439ad51
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-5-11.js
@@ -0,0 +1,17 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: Array.prototype.some - String object can be used as thisArg
+---*/
+
+var objString = new String();
+
+function callbackfn(val, idx, obj) {
+  return this === objString;
+}
+
+assert([11].some(callbackfn, objString), '[11].some(callbackfn, objString) !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-5-12.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-5-12.js
new file mode 100644
index 0000000000..56d787e708
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-5-12.js
@@ -0,0 +1,17 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: Array.prototype.some - Boolean object can be used as thisArg
+---*/
+
+var objBoolean = new Boolean();
+
+function callbackfn(val, idx, obj) {
+  return this === objBoolean;
+}
+
+assert([11].some(callbackfn, objBoolean), '[11].some(callbackfn, objBoolean) !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-5-13.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-5-13.js
new file mode 100644
index 0000000000..2749fc791b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-5-13.js
@@ -0,0 +1,17 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: Array.prototype.some - Number object can be used as thisArg
+---*/
+
+var objNumber = new Number();
+
+function callbackfn(val, idx, obj) {
+  return this === objNumber;
+}
+
+assert([11].some(callbackfn, objNumber), '[11].some(callbackfn, objNumber) !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-5-14.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-5-14.js
new file mode 100644
index 0000000000..f7fd30cac7
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-5-14.js
@@ -0,0 +1,15 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: Array.prototype.some - the Math object can be used as thisArg
+---*/
+
+function callbackfn(val, idx, obj) {
+  return this === Math;
+}
+
+assert([11].some(callbackfn, Math), '[11].some(callbackfn, Math) !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-5-15.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-5-15.js
new file mode 100644
index 0000000000..e2ed7c34b5
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-5-15.js
@@ -0,0 +1,17 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: Array.prototype.some - Date object can be used as thisArg
+---*/
+
+var objDate = new Date();
+
+function callbackfn(val, idx, obj) {
+  return this === objDate;
+}
+
+assert([11].some(callbackfn, objDate), '[11].some(callbackfn, objDate) !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-5-16.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-5-16.js
new file mode 100644
index 0000000000..138dc2a029
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-5-16.js
@@ -0,0 +1,17 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: Array.prototype.some - RegExp object can be used as thisArg
+---*/
+
+var objRegExp = new RegExp();
+
+function callbackfn(val, idx, obj) {
+  return this === objRegExp;
+}
+
+assert([11].some(callbackfn, objRegExp), '[11].some(callbackfn, objRegExp) !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-5-17.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-5-17.js
new file mode 100644
index 0000000000..288c302fdf
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-5-17.js
@@ -0,0 +1,15 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: Array.prototype.some - the JSON object can be used as thisArg
+---*/
+
+function callbackfn(val, idx, obj) {
+  return this === JSON;
+}
+
+assert([11].some(callbackfn, JSON), '[11].some(callbackfn, JSON) !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-5-18.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-5-18.js
new file mode 100644
index 0000000000..3aec4d53e4
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-5-18.js
@@ -0,0 +1,17 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: Array.prototype.some - Error object can be used as thisArg
+---*/
+
+var objError = new RangeError();
+
+function callbackfn(val, idx, obj) {
+  return this === objError;
+}
+
+assert([11].some(callbackfn, objError), '[11].some(callbackfn, objError) !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-5-19.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-5-19.js
new file mode 100644
index 0000000000..3e1e046c5a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-5-19.js
@@ -0,0 +1,21 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: Array.prototype.some - the Arguments object can be used as thisArg
+---*/
+
+var arg;
+
+function callbackfn(val, idx, obj) {
+  return this === arg;
+}
+
+(function fun() {
+  arg = arguments;
+}(1, 2, 3));
+
+assert([11].some(callbackfn, arg), '[11].some(callbackfn, arg) !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-5-2.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-5-2.js
new file mode 100644
index 0000000000..ca0aa799a5
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-5-2.js
@@ -0,0 +1,22 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: Array.prototype.some - thisArg is Object
+---*/
+
+var res = false;
+var o = new Object();
+o.res = true;
+
+function callbackfn(val, idx, obj)
+{
+  return this.res;
+}
+
+var arr = [1];
+
+assert.sameValue(arr.some(callbackfn, o), true, 'arr.some(callbackfn, o)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-5-21.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-5-21.js
new file mode 100644
index 0000000000..24a2e2906b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-5-21.js
@@ -0,0 +1,17 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: Array.prototype.some - the global object can be used as thisArg
+---*/
+
+var global = this;
+
+function callbackfn(val, idx, obj) {
+  return this === global;
+}
+
+assert([11].some(callbackfn, this), '[11].some(callbackfn, global) !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-5-22.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-5-22.js
new file mode 100644
index 0000000000..5089e4e2fe
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-5-22.js
@@ -0,0 +1,15 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: Array.prototype.some - boolean primitive can be used as thisArg
+---*/
+
+function callbackfn(val, idx, obj) {
+  return this.valueOf() === false;
+}
+
+assert([11].some(callbackfn, false), '[11].some(callbackfn, false) !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-5-23.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-5-23.js
new file mode 100644
index 0000000000..418086d116
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-5-23.js
@@ -0,0 +1,15 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: Array.prototype.some - number primitive can be used as thisArg
+---*/
+
+function callbackfn(val, idx, obj) {
+  return this.valueOf() === 101;
+}
+
+assert([11].some(callbackfn, 101), '[11].some(callbackfn, 101) !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-5-24.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-5-24.js
new file mode 100644
index 0000000000..518655319e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-5-24.js
@@ -0,0 +1,15 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: Array.prototype.some - string primitive can be used as thisArg
+---*/
+
+function callbackfn(val, idx, obj) {
+  return this.valueOf() === "abc";
+}
+
+assert([11].some(callbackfn, "abc"), '[11].some(callbackfn, "abc") !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-5-25.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-5-25.js
new file mode 100644
index 0000000000..f4ea752cc8
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-5-25.js
@@ -0,0 +1,23 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: Array.prototype.some - thisArg not passed
+flags: [noStrict]
+---*/
+
+function innerObj() {
+  this._15_4_4_17_5_25 = true;
+  var _15_4_4_17_5_25 = false;
+
+  function callbackfn(val, idx, obj) {
+    return this._15_4_4_17_5_25;
+  }
+  var arr = [1];
+  this.retVal = !arr.some(callbackfn);
+}
+
+assert(new innerObj().retVal, 'new innerObj().retVal !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-5-3.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-5-3.js
new file mode 100644
index 0000000000..f571ffbcfe
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-5-3.js
@@ -0,0 +1,22 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: Array.prototype.some - thisArg is Array
+---*/
+
+var res = false;
+var a = new Array();
+a.res = true;
+
+function callbackfn(val, idx, obj)
+{
+  return this.res;
+}
+
+var arr = [1];
+
+assert.sameValue(arr.some(callbackfn, a), true, 'arr.some(callbackfn, a)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-5-4.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-5-4.js
new file mode 100644
index 0000000000..a867b5812b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-5-4.js
@@ -0,0 +1,25 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some - thisArg is object from object
+    template(prototype)
+---*/
+
+var res = false;
+
+function callbackfn(val, idx, obj)
+{
+  return this.res;
+}
+
+function foo() {}
+foo.prototype.res = true;
+var f = new foo();
+var arr = [1];
+
+assert.sameValue(arr.some(callbackfn, f), true, 'arr.some(callbackfn,f)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-5-5.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-5-5.js
new file mode 100644
index 0000000000..a3e2f839cb
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-5-5.js
@@ -0,0 +1,23 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: Array.prototype.some - thisArg is object from object template
+---*/
+
+var res = false;
+
+function callbackfn(val, idx, obj)
+{
+  return this.res;
+}
+
+function foo() {}
+var f = new foo();
+f.res = true;
+var arr = [1];
+
+assert.sameValue(arr.some(callbackfn, f), true, 'arr.some(callbackfn,f)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-5-6.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-5-6.js
new file mode 100644
index 0000000000..22810c4ba3
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-5-6.js
@@ -0,0 +1,22 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: Array.prototype.some - thisArg is function
+---*/
+
+var res = false;
+
+function callbackfn(val, idx, obj)
+{
+  return this.res;
+}
+
+function foo() {}
+foo.res = true;
+var arr = [1];
+
+assert.sameValue(arr.some(callbackfn, foo), true, 'arr.some(callbackfn,foo)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-5-7.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-5-7.js
new file mode 100644
index 0000000000..93772a1273
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-5-7.js
@@ -0,0 +1,15 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: Array.prototype.some - built-in functions can be used as thisArg
+---*/
+
+function callbackfn(val, idx, obj) {
+  return this === eval;
+}
+
+assert([11].some(callbackfn, eval), '[11].some(callbackfn, eval) !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-5-9.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-5-9.js
new file mode 100644
index 0000000000..3743731429
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-5-9.js
@@ -0,0 +1,17 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: Array.prototype.some - Function Object can be used as thisArg
+---*/
+
+var objFunction = function() {};
+
+function callbackfn(val, idx, obj) {
+  return this === objFunction;
+}
+
+assert([11].some(callbackfn, objFunction), '[11].some(callbackfn, objFunction) !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-1.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-1.js
new file mode 100644
index 0000000000..b3dc43d070
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-1.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some considers new elements added to array after
+    it is called
+---*/
+
+var calledForThree = false;
+
+function callbackfn(val, idx, obj)
+{
+  arr[2] = 3;
+  if (val !== 3)
+    calledForThree = true;
+
+  return false;
+}
+
+var arr = [1, 2, , 4, 5];
+
+var val = arr.some(callbackfn);
+
+assert(calledForThree, 'calledForThree !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-2.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-2.js
new file mode 100644
index 0000000000..5f1ea0cdf2
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-2.js
@@ -0,0 +1,25 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some considers new value of elements in array
+    after it is called
+---*/
+
+function callbackfn(val, idx, obj)
+{
+  arr[4] = 6;
+  if (val < 6)
+    return false;
+  else
+    return true;
+}
+
+var arr = [1, 2, 3, 4, 5];
+
+
+assert.sameValue(arr.some(callbackfn), true, 'arr.some(callbackfn)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-3.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-3.js
new file mode 100644
index 0000000000..90294014d7
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-3.js
@@ -0,0 +1,25 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some doesn't visit deleted elements in array after
+    it is called
+---*/
+
+function callbackfn(val, idx, obj)
+{
+  delete arr[2];
+  if (val !== 3)
+    return false;
+  else
+    return true;
+}
+
+var arr = [1, 2, 3, 4, 5];
+
+
+assert.sameValue(arr.some(callbackfn), false, 'arr.some(callbackfn)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-4.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-4.js
new file mode 100644
index 0000000000..ee3cb4ac72
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-4.js
@@ -0,0 +1,25 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some doesn't visit deleted elements when
+    Array.length is decreased
+---*/
+
+function callbackfn(val, idx, obj)
+{
+  arr.length = 3;
+  if (val < 4)
+    return false;
+  else
+    return true;
+}
+
+var arr = [1, 2, 3, 4, 6];
+
+
+assert.sameValue(arr.some(callbackfn), false, 'arr.some(callbackfn)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-5.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-5.js
new file mode 100644
index 0000000000..b3bd45a377
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-5.js
@@ -0,0 +1,27 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some doesn't consider newly added elements in
+    sparse array
+---*/
+
+function callbackfn(val, idx, obj)
+{
+  arr[1000] = 5;
+  if (val < 5)
+    return false;
+  else
+    return true;
+}
+
+var arr = new Array(10);
+arr[1] = 1;
+arr[2] = 2;
+
+
+assert.sameValue(arr.some(callbackfn), false, 'arr.some(callbackfn)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-6.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-6.js
new file mode 100644
index 0000000000..64ac2a2ed3
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-6.js
@@ -0,0 +1,29 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some visits deleted element in array after the
+    call when same index is also present in prototype
+---*/
+
+function callbackfn(val, idx, obj)
+{
+  delete arr[4];
+  if (val < 5)
+    return false;
+  else
+    return true;
+}
+
+
+Array.prototype[4] = 5;
+var arr = [1, 2, 3, 4, 5];
+
+var res = arr.some(callbackfn);
+delete Array.prototype[4];
+
+assert.sameValue(res, true, 'res');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-8.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-8.js
new file mode 100644
index 0000000000..7d7b613744
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-8.js
@@ -0,0 +1,25 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: Array.prototype.some - no observable effects occur if length is 0
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return val > 10;
+}
+
+var obj = {
+  0: 11,
+  1: 12,
+  length: 0
+};
+
+assert.sameValue(Array.prototype.some.call(obj, callbackfn), false, 'Array.prototype.some.call(obj, callbackfn)');
+assert.sameValue(accessed, false, 'accessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-9.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-9.js
new file mode 100644
index 0000000000..65f67b382d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-9.js
@@ -0,0 +1,35 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some - modifications to length don't change number
+    of iterations
+---*/
+
+var called = 0;
+
+function callbackfn(val, idx, obj) {
+  called++;
+  return val > 10;
+}
+
+var obj = {
+  0: 9,
+  2: 12,
+  length: 3
+};
+
+Object.defineProperty(obj, "1", {
+  get: function() {
+    obj.length = 2;
+    return 8;
+  },
+  configurable: true
+});
+
+assert(Array.prototype.some.call(obj, callbackfn), 'Array.prototype.some.call(obj, callbackfn) !== true');
+assert.sameValue(called, 3, 'called');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-b-1.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-b-1.js
new file mode 100644
index 0000000000..6530da092d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-b-1.js
@@ -0,0 +1,25 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some - callbackfn not called for indexes never
+    been assigned values
+---*/
+
+var callCnt = 0;
+
+function callbackfn(val, idx, obj)
+{
+  callCnt++;
+  return false;
+}
+
+var arr = new Array(10);
+arr[1] = undefined;
+arr.some(callbackfn);
+
+assert.sameValue(callCnt, 1, 'callCnt');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-b-10.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-b-10.js
new file mode 100644
index 0000000000..a33e5639b9
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-b-10.js
@@ -0,0 +1,35 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some - deleting property of prototype causes
+    prototype index property not to be visited on an Array-like Object
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return idx === 1;
+}
+var arr = {
+  2: 2,
+  length: 20
+};
+
+Object.defineProperty(arr, "0", {
+  get: function() {
+    delete Object.prototype[1];
+    return 0;
+  },
+  configurable: true
+});
+
+Object.prototype[1] = 1;
+
+assert.sameValue(Array.prototype.some.call(arr, callbackfn), false, 'Array.prototype.some.call(arr, callbackfn)');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-b-11.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-b-11.js
new file mode 100644
index 0000000000..9e52508595
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-b-11.js
@@ -0,0 +1,32 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some - deleting property of prototype causes
+    prototype index property not to be visited on an Array
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return idx === 1;
+}
+var arr = [0, , 2];
+
+Object.defineProperty(arr, "0", {
+  get: function() {
+    delete Array.prototype[1];
+    return 0;
+  },
+  configurable: true
+});
+
+Array.prototype[1] = 1;
+
+assert.sameValue(arr.some(callbackfn), false, 'arr.some(callbackfn)');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-b-12.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-b-12.js
new file mode 100644
index 0000000000..cab3ebcd10
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-b-12.js
@@ -0,0 +1,38 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some - deleting own property with prototype
+    property causes prototype index property to be visited on an
+    Array-like object
+---*/
+
+function callbackfn(val, idx, obj) {
+  if (idx === 1 && val === 1) {
+    return true;
+  } else {
+    return false;
+  }
+}
+var arr = {
+  0: 0,
+  1: 111,
+  2: 2,
+  length: 10
+};
+
+Object.defineProperty(arr, "0", {
+  get: function() {
+    delete arr[1];
+    return 0;
+  },
+  configurable: true
+});
+
+Object.prototype[1] = 1;
+
+assert(Array.prototype.some.call(arr, callbackfn), 'Array.prototype.some.call(arr, callbackfn) !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-b-13.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-b-13.js
new file mode 100644
index 0000000000..c609035a58
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-b-13.js
@@ -0,0 +1,32 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some - deleting own property with prototype
+    property causes prototype index property to be visited on an Array
+---*/
+
+function callbackfn(val, idx, obj) {
+  if (idx === 1 && val === 1) {
+    return true;
+  } else {
+    return false;
+  }
+}
+var arr = [0, 111, 2];
+
+Object.defineProperty(arr, "0", {
+  get: function() {
+    delete arr[1];
+    return 0;
+  },
+  configurable: true
+});
+
+Array.prototype[1] = 1;
+
+assert(arr.some(callbackfn), 'arr.some(callbackfn) !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-b-14.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-b-14.js
new file mode 100644
index 0000000000..62bb2d6423
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-b-14.js
@@ -0,0 +1,30 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some - decreasing length of array causes index
+    property not to be visited
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return idx === 3;
+}
+var arr = [0, 1, 2, "last"];
+
+Object.defineProperty(arr, "0", {
+  get: function() {
+    arr.length = 3;
+    return 0;
+  },
+  configurable: true
+});
+
+assert.sameValue(arr.some(callbackfn), false, 'arr.some(callbackfn)');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-b-15.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-b-15.js
new file mode 100644
index 0000000000..80ae4f1339
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-b-15.js
@@ -0,0 +1,37 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some - decreasing length of array with prototype
+    property causes prototype index property to be visited
+---*/
+
+function callbackfn(val, idx, obj) {
+  if (idx === 2 && val === "prototype") {
+    return true;
+  } else {
+    return false;
+  }
+}
+var arr = [0, 1, 2];
+
+Object.defineProperty(Array.prototype, "2", {
+  get: function() {
+    return "prototype";
+  },
+  configurable: true
+});
+
+Object.defineProperty(arr, "1", {
+  get: function() {
+    arr.length = 2;
+    return 1;
+  },
+  configurable: true
+});
+
+assert(arr.some(callbackfn), 'arr.some(callbackfn) !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-b-16.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-b-16.js
new file mode 100644
index 0000000000..1d42f045b3
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-b-16.js
@@ -0,0 +1,39 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some - decreasing length of array does not delete
+    non-configurable properties
+flags: [noStrict]
+---*/
+
+function callbackfn(val, idx, obj) {
+  if (idx === 2 && val === "unconfigurable") {
+    return true;
+  } else {
+    return false;
+  }
+}
+
+var arr = [0, 1, 2];
+
+Object.defineProperty(arr, "2", {
+  get: function() {
+    return "unconfigurable";
+  },
+  configurable: false
+});
+
+Object.defineProperty(arr, "1", {
+  get: function() {
+    arr.length = 2;
+    return 1;
+  },
+  configurable: true
+});
+
+assert(arr.some(callbackfn), 'arr.some(callbackfn) !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-b-2.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-b-2.js
new file mode 100644
index 0000000000..6a58a9d162
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-b-2.js
@@ -0,0 +1,29 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: Array.prototype.some - added properties in step 2 are visible here
+---*/
+
+function callbackfn(val, idx, obj) {
+  if (idx === 2 && val === "length") {
+    return true;
+  } else {
+    return false;
+  }
+}
+
+var arr = {};
+
+Object.defineProperty(arr, "length", {
+  get: function() {
+    arr[2] = "length";
+    return 3;
+  },
+  configurable: true
+});
+
+assert(Array.prototype.some.call(arr, callbackfn), 'Array.prototype.some.call(arr, callbackfn) !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-b-3.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-b-3.js
new file mode 100644
index 0000000000..3ee6f6184d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-b-3.js
@@ -0,0 +1,33 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some - deleted properties in step 2 are visible
+    here
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return idx === 2;
+}
+var arr = {
+  2: 6.99,
+  8: 19
+};
+
+Object.defineProperty(arr, "length", {
+  get: function() {
+    delete arr[2];
+    return 10;
+  },
+  configurable: true
+});
+
+assert.sameValue(Array.prototype.some.call(arr, callbackfn), false, 'Array.prototype.some.call(arr, callbackfn)');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-b-4.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-b-4.js
new file mode 100644
index 0000000000..e2116777bf
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-b-4.js
@@ -0,0 +1,38 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some - properties added into own object after
+    current position are visited on an Array-like object
+---*/
+
+function callbackfn(val, idx, obj) {
+  if (idx === 1 && val === 1) {
+    return true;
+  } else {
+    return false;
+  }
+}
+
+var arr = {
+  length: 2
+};
+
+Object.defineProperty(arr, "0", {
+  get: function() {
+    Object.defineProperty(arr, "1", {
+      get: function() {
+        return 1;
+      },
+      configurable: true
+    });
+    return 0;
+  },
+  configurable: true
+});
+
+assert(Array.prototype.some.call(arr, callbackfn), 'Array.prototype.some.call(arr, callbackfn) !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-b-5.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-b-5.js
new file mode 100644
index 0000000000..4e5f64cedd
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-b-5.js
@@ -0,0 +1,36 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some - properties added into own object after
+    current position are visited on an Array
+---*/
+
+function callbackfn(val, idx, obj) {
+  if (idx === 1 && val === 1) {
+    return true;
+  } else {
+    return false;
+  }
+}
+
+var arr = [0, , 2];
+
+Object.defineProperty(arr, "0", {
+  get: function() {
+    Object.defineProperty(arr, "1", {
+      get: function() {
+        return 1;
+      },
+      configurable: true
+    });
+    return 0;
+  },
+  configurable: true
+});
+
+assert(arr.some(callbackfn), 'arr.some(callbackfn) !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-b-6.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-b-6.js
new file mode 100644
index 0000000000..866ab83ae5
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-b-6.js
@@ -0,0 +1,37 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some - properties can be added to prototype after
+    current position are visited on an Array-like object
+---*/
+
+function callbackfn(val, idx, obj) {
+  if (idx === 1 && val === 6.99) {
+    return true;
+  } else {
+    return false;
+  }
+}
+var arr = {
+  length: 2
+};
+
+Object.defineProperty(arr, "0", {
+  get: function() {
+    Object.defineProperty(Object.prototype, "1", {
+      get: function() {
+        return 6.99;
+      },
+      configurable: true
+    });
+    return 0;
+  },
+  configurable: true
+});
+
+assert(Array.prototype.some.call(arr, callbackfn), 'Array.prototype.some.call(arr, callbackfn) !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-b-7.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-b-7.js
new file mode 100644
index 0000000000..cadb08bf1b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-b-7.js
@@ -0,0 +1,35 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some - properties can be added to prototype after
+    current position are visited on an Array
+---*/
+
+function callbackfn(val, idx, obj) {
+  if (idx === 1 && val === 6.99) {
+    return true;
+  } else {
+    return false;
+  }
+}
+var arr = [0, , 2];
+
+Object.defineProperty(arr, "0", {
+  get: function() {
+    Object.defineProperty(Array.prototype, "1", {
+      get: function() {
+        return 6.99;
+      },
+      configurable: true
+    });
+    return 0;
+  },
+  configurable: true
+});
+
+assert(arr.some(callbackfn), 'arr.some(callbackfn) !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-b-8.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-b-8.js
new file mode 100644
index 0000000000..b953631ba4
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-b-8.js
@@ -0,0 +1,39 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some - deleting own property causes index property
+    not to be visited on an Array-like object
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return idx === 1;
+}
+var arr = {
+  length: 2
+};
+
+Object.defineProperty(arr, "1", {
+  get: function() {
+    return 6.99;
+  },
+  configurable: true
+});
+
+Object.defineProperty(arr, "0", {
+  get: function() {
+    delete arr[1];
+    return 0;
+  },
+  configurable: true
+});
+
+assert.sameValue(Array.prototype.some.call(arr, callbackfn), false, 'Array.prototype.some.call(arr, callbackfn)');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-b-9.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-b-9.js
new file mode 100644
index 0000000000..72daa217d0
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-b-9.js
@@ -0,0 +1,37 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some - deleting own property causes index property
+    not to be visited on an Array
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return idx === 1;
+}
+var arr = [1, 2];
+
+Object.defineProperty(arr, "1", {
+  get: function() {
+    return "6.99";
+  },
+  configurable: true
+});
+
+Object.defineProperty(arr, "0", {
+  get: function() {
+    delete arr[1];
+    return 0;
+  },
+  configurable: true
+});
+
+assert.sameValue(arr.some(callbackfn), false, 'arr.some(callbackfn)');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-i-1.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-i-1.js
new file mode 100644
index 0000000000..7d32330b89
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-i-1.js
@@ -0,0 +1,27 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some - element to be retrieved is own data
+    property on an Array-like object
+---*/
+
+var kValue = {};
+
+function callbackfn(val, idx, obj) {
+  if (idx === 5) {
+    return val === kValue;
+  }
+  return false;
+}
+
+var obj = {
+  5: kValue,
+  length: 100
+};
+
+assert(Array.prototype.some.call(obj, callbackfn), 'Array.prototype.some.call(obj, callbackfn) !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-i-10.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-i-10.js
new file mode 100644
index 0000000000..63e8ed2d66
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-i-10.js
@@ -0,0 +1,31 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some - element to be retrieved is own accessor
+    property on an Array
+---*/
+
+var kValue = "abc";
+
+function callbackfn(val, idx, obj) {
+  if (idx === 10) {
+    return val === kValue;
+  }
+  return false;
+}
+
+var arr = [];
+
+Object.defineProperty(arr, "10", {
+  get: function() {
+    return kValue;
+  },
+  configurable: true
+});
+
+assert(arr.some(callbackfn), 'arr.some(callbackfn) !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-i-11.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-i-11.js
new file mode 100644
index 0000000000..c15d49c876
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-i-11.js
@@ -0,0 +1,40 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some - element to be retrieved is own accessor
+    property that overrides an inherited data property on an
+    Array-like object
+---*/
+
+var kValue = "abc";
+
+function callbackfn(val, idx, obj) {
+  if (idx === 1) {
+    return val === kValue;
+  }
+  return false;
+}
+
+var proto = {
+  1: 6
+};
+
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+child.length = 10;
+
+Object.defineProperty(child, "1", {
+  get: function() {
+    return kValue;
+  },
+  configurable: true
+});
+
+assert(Array.prototype.some.call(child, callbackfn), 'Array.prototype.some.call(child, callbackfn) !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-i-12.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-i-12.js
new file mode 100644
index 0000000000..c7c720d446
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-i-12.js
@@ -0,0 +1,32 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some - element to be retrieved is own accessor
+    property that overrides an inherited data property on an Array
+---*/
+
+var kValue = "abc";
+
+function callbackfn(val, idx, obj) {
+  if (idx === 1) {
+    return val === kValue;
+  }
+  return false;
+}
+
+var arr = [];
+
+Array.prototype[1] = 100;
+Object.defineProperty(arr, "1", {
+  get: function() {
+    return kValue;
+  },
+  configurable: true
+});
+
+assert(arr.some(callbackfn), 'arr.some(callbackfn) !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-i-13.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-i-13.js
new file mode 100644
index 0000000000..5da957c962
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-i-13.js
@@ -0,0 +1,46 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some - element to be retrieved is own accessor
+    property that overrides an inherited accessor property on an
+    Array-like object
+---*/
+
+var kValue = "abc";
+
+function callbackfn(val, idx, obj) {
+  if (idx === 1) {
+    return val === kValue;
+  }
+  return false;
+}
+
+var proto = {};
+
+Object.defineProperty(proto, "1", {
+  get: function() {
+    return 5;
+  },
+  configurable: true
+});
+
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+child.length = 10;
+
+Object.defineProperty(child, "1", {
+  get: function() {
+    return kValue;
+  },
+  configurable: true
+});
+
+
+assert(Array.prototype.some.call(child, callbackfn), 'Array.prototype.some.call(child, callbackfn) !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-i-14.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-i-14.js
new file mode 100644
index 0000000000..19f8c662ed
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-i-14.js
@@ -0,0 +1,37 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some - element to be retrieved is own accessor
+    property that overrides an inherited accessor property on an Array
+---*/
+
+var kValue = "abc";
+
+function callbackfn(val, idx, obj) {
+  if (idx === 1) {
+    return val === kValue;
+  }
+  return false;
+}
+
+var arr = [];
+Object.defineProperty(arr, "1", {
+  get: function() {
+    return kValue;
+  },
+  configurable: true
+});
+
+Object.defineProperty(Array.prototype, "1", {
+  get: function() {
+    return 10;
+  },
+  configurable: true
+});
+
+assert(arr.some(callbackfn), 'arr.some(callbackfn) !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-i-15.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-i-15.js
new file mode 100644
index 0000000000..a1edeb465d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-i-15.js
@@ -0,0 +1,37 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some - element to be retrieved is inherited
+    accessor property on an Array-like object
+---*/
+
+var kValue = "abc";
+
+function callbackfn(val, idx, obj) {
+  if (idx === 1) {
+    return val === kValue;
+  }
+  return false;
+}
+
+var proto = {};
+
+Object.defineProperty(proto, "1", {
+  get: function() {
+    return kValue;
+  },
+  configurable: true
+});
+
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+child.length = 20;
+
+assert(Array.prototype.some.call(child, callbackfn), 'Array.prototype.some.call(child, callbackfn) !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-i-16.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-i-16.js
new file mode 100644
index 0000000000..e7a9005b5e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-i-16.js
@@ -0,0 +1,29 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some - element to be retrieved is inherited
+    accessor property on an Array
+---*/
+
+var kValue = "abc";
+
+function callbackfn(val, idx, obj) {
+  if (idx === 1) {
+    return val === kValue;
+  }
+  return false;
+}
+
+Object.defineProperty(Array.prototype, "1", {
+  get: function() {
+    return kValue;
+  },
+  configurable: true
+});
+
+assert([, , ].some(callbackfn), '[, , ].some(callbackfn) !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-i-17.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-i-17.js
new file mode 100644
index 0000000000..195403672c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-i-17.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some - element to be retrieved is own accessor
+    property without a get function on an Array-like object
+---*/
+
+function callbackfn(val, idx, obj) {
+  if (idx === 1) {
+    return typeof val === "undefined";
+  }
+  return false;
+}
+
+var obj = {
+  length: 2
+};
+Object.defineProperty(obj, "1", {
+  set: function() {},
+  configurable: true
+});
+
+assert(Array.prototype.some.call(obj, callbackfn), 'Array.prototype.some.call(obj, callbackfn) !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-i-18.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-i-18.js
new file mode 100644
index 0000000000..fbe5ee379a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-i-18.js
@@ -0,0 +1,27 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some - element to be retrieved is own accessor
+    property without a get function on an Array
+---*/
+
+function callbackfn(val, idx, obj) {
+  if (idx === 0) {
+    return typeof val === "undefined";
+  }
+  return false;
+}
+
+var arr = [];
+
+Object.defineProperty(arr, "0", {
+  set: function() {},
+  configurable: true
+});
+
+assert(arr.some(callbackfn), 'arr.some(callbackfn) !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-i-19.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-i-19.js
new file mode 100644
index 0000000000..ead6bb8a67
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-i-19.js
@@ -0,0 +1,31 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some - element to be retrieved is own accessor
+    property without a get function that overrides an inherited
+    accessor property on an Array-like object
+---*/
+
+function callbackfn(val, idx, obj) {
+  if (idx === 1) {
+    return typeof val === "undefined";
+  }
+  return false;
+}
+
+var obj = {
+  length: 2
+};
+Object.defineProperty(obj, "1", {
+  set: function() {},
+  configurable: true
+});
+
+Object.prototype[1] = 10;
+
+assert(Array.prototype.some.call(obj, callbackfn), 'Array.prototype.some.call(obj, callbackfn) !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-i-2.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-i-2.js
new file mode 100644
index 0000000000..d062719e21
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-i-2.js
@@ -0,0 +1,22 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some - element to be retrieved is own data
+    property on an Array
+---*/
+
+var kValue = {};
+
+function callbackfn(val, idx, obj) {
+  if (idx === 0) {
+    return kValue === val;
+  }
+  return false;
+}
+
+assert([kValue].some(callbackfn), '[kValue].some(callbackfn) !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-i-20.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-i-20.js
new file mode 100644
index 0000000000..1fe7b44883
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-i-20.js
@@ -0,0 +1,30 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some - element to be retrieved is own accessor
+    property without a get function that overrides an inherited
+    accessor property on an Array
+---*/
+
+function callbackfn(val, idx, obj) {
+  if (idx === 0) {
+    return typeof val === "undefined";
+  }
+  return false;
+}
+
+var arr = [];
+
+Object.defineProperty(arr, "0", {
+  set: function() {},
+  configurable: true
+});
+
+Array.prototype[0] = 100;
+
+assert(arr.some(callbackfn), 'arr.some(callbackfn) !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-i-21.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-i-21.js
new file mode 100644
index 0000000000..abef840c25
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-i-21.js
@@ -0,0 +1,32 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some - element to be retrieved is inherited
+    accessor property without a get function on an Array-like object
+---*/
+
+function callbackfn(val, idx, obj) {
+  if (idx === 1) {
+    return typeof val === "undefined";
+  }
+  return false;
+}
+
+var proto = {};
+Object.defineProperty(proto, "1", {
+  set: function() {},
+  configurable: true
+});
+
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+child.length = 2;
+
+assert(Array.prototype.some.call(child, callbackfn), 'Array.prototype.some.call(child, callbackfn) !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-i-22.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-i-22.js
new file mode 100644
index 0000000000..d7e07d4566
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-i-22.js
@@ -0,0 +1,25 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some - element to be retrieved is inherited
+    accessor property without a get function on an Array
+---*/
+
+function callbackfn(val, idx, obj) {
+  if (idx === 0) {
+    return typeof val === "undefined";
+  }
+  return false;
+}
+
+Object.defineProperty(Array.prototype, "0", {
+  set: function() {},
+  configurable: true
+});
+
+assert([, ].some(callbackfn), '[, ].some(callbackfn) !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-i-25.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-i-25.js
new file mode 100644
index 0000000000..98353a5ebe
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-i-25.js
@@ -0,0 +1,25 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some - This object is the Arguments object which
+    implements its own property get method (number of arguments is
+    less than number of parameters)
+---*/
+
+function callbackfn(val, idx, obj) {
+  if (idx === 0) {
+    return val === 11;
+  }
+  return false;
+}
+
+var func = function(a, b) {
+  return Array.prototype.some.call(arguments, callbackfn);
+};
+
+assert(func(11), 'func(11) !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-i-26.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-i-26.js
new file mode 100644
index 0000000000..c2ef229b2a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-i-26.js
@@ -0,0 +1,35 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some - This object is the Arguments object which
+    implements its own property get method (number of arguments equals
+    number of parameters)
+---*/
+
+var firstResult = false;
+var secondResult = false;
+
+function callbackfn(val, idx, obj) {
+  if (idx === 0) {
+    firstResult = (val === 11);
+    return false;
+  } else if (idx === 1) {
+    secondResult = (val === 9);
+    return false;
+  } else {
+    return true;
+  }
+}
+
+var func = function(a, b) {
+  return Array.prototype.some.call(arguments, callbackfn);
+};
+
+assert.sameValue(func(11, 9), false, 'func(11, 9)');
+assert(firstResult, 'firstResult !== true');
+assert(secondResult, 'secondResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-i-27.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-i-27.js
new file mode 100644
index 0000000000..ccae948b80
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-i-27.js
@@ -0,0 +1,40 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some - This object is the Arguments object which
+    implements its own property get method (number of arguments is
+    greater than number of parameters)
+---*/
+
+var firstResult = false;
+var secondResult = false;
+var thirdResult = false;
+
+function callbackfn(val, idx, obj) {
+  if (idx === 0) {
+    firstResult = (val === 11);
+    return false;
+  } else if (idx === 1) {
+    secondResult = (val === 12);
+    return false;
+  } else if (idx === 2) {
+    thirdResult = (val === 9);
+    return false;
+  } else {
+    return true;
+  }
+}
+
+var func = function(a, b) {
+  return Array.prototype.some.call(arguments, callbackfn);
+};
+
+assert.sameValue(func(11, 12, 9), false, 'func(11, 12, 9)');
+assert(firstResult, 'firstResult !== true');
+assert(secondResult, 'secondResult !== true');
+assert(thirdResult, 'thirdResult !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-i-28.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-i-28.js
new file mode 100644
index 0000000000..cf84f1ed5f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-i-28.js
@@ -0,0 +1,41 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some - element changed by getter on previous
+    iterations is observed on an Array
+---*/
+
+function callbackfn(val, idx, obj) {
+  if (idx === 1) {
+    return val === 12;
+  }
+  return false;
+}
+
+var arr = [];
+var helpVerifyVar = 11;
+
+Object.defineProperty(arr, "1", {
+  get: function() {
+    return helpVerifyVar;
+  },
+  set: function(args) {
+    helpVerifyVar = args;
+  },
+  configurable: true
+});
+
+Object.defineProperty(arr, "0", {
+  get: function() {
+    arr[1] = 12;
+    return 9;
+  },
+  configurable: true
+});
+
+assert(arr.some(callbackfn), 'arr.some(callbackfn) !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-i-29.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-i-29.js
new file mode 100644
index 0000000000..282c17991c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-i-29.js
@@ -0,0 +1,43 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some - element changed by getter on previous
+    iterations on an Array-like object
+---*/
+
+function callbackfn(val, idx, obj) {
+  if (idx === 1) {
+    return val === 12;
+  }
+  return false;
+}
+
+var obj = {
+  length: 2
+};
+var helpVerifyVar = 11;
+
+Object.defineProperty(obj, "1", {
+  get: function() {
+    return helpVerifyVar;
+  },
+  set: function(args) {
+    helpVerifyVar = args;
+  },
+  configurable: true
+});
+
+Object.defineProperty(obj, "0", {
+  get: function() {
+    obj[1] = 12;
+    return 11;
+  },
+  configurable: true
+});
+
+assert(Array.prototype.some.call(obj, callbackfn), 'Array.prototype.some.call(obj, callbackfn) !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-i-3.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-i-3.js
new file mode 100644
index 0000000000..6f60e78b19
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-i-3.js
@@ -0,0 +1,34 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some - element to be retrieved is own data
+    property that overrides an inherited data property on an
+    Array-like object
+---*/
+
+var kValue = "abc";
+
+function callbackfn(val, idx, obj) {
+  if (idx === 5) {
+    return val === kValue;
+  }
+  return false;
+}
+
+var proto = {
+  5: 100
+};
+
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+child[5] = kValue;
+child.length = 10;
+
+assert(Array.prototype.some.call(child, callbackfn), 'Array.prototype.some.call(child, callbackfn) !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-i-30.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-i-30.js
new file mode 100644
index 0000000000..f9e410867e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-i-30.js
@@ -0,0 +1,34 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some - unhandled exceptions happened in getter
+    terminate iteration on an Array-like object
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  if (idx > 1) {
+    accessed = true;
+  }
+  return true;
+}
+
+var obj = {
+  length: 20
+};
+Object.defineProperty(obj, "1", {
+  get: function() {
+    throw new RangeError("unhandle exception happened in getter");
+  },
+  configurable: true
+});
+assert.throws(RangeError, function() {
+  Array.prototype.some.call(obj, callbackfn);
+});
+assert.sameValue(accessed, false, 'accessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-i-31.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-i-31.js
new file mode 100644
index 0000000000..93e96ea829
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-i-31.js
@@ -0,0 +1,33 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some - unhandled exceptions happened in getter
+    terminate iteration on an Array
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  if (idx > 0) {
+    accessed = true;
+  }
+  return true;
+}
+
+var arr = [];
+arr[10] = 100;
+Object.defineProperty(arr, "0", {
+  get: function() {
+    throw new RangeError("unhandle exception happened in getter");
+  },
+  configurable: true
+});
+assert.throws(RangeError, function() {
+  arr.some(callbackfn);
+});
+assert.sameValue(accessed, false, 'accessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-i-4.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-i-4.js
new file mode 100644
index 0000000000..8ddf2a0258
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-i-4.js
@@ -0,0 +1,24 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some - element to be retrieved is own data
+    property that overrides an inherited data property on an Array
+---*/
+
+var kValue = "abc";
+
+function callbackfn(val, idx, obj) {
+  if (idx === 0) {
+    return val === kValue;
+  }
+  return false;
+}
+
+Array.prototype[0] = 11;
+
+assert([kValue].some(callbackfn), '[kValue].some(callbackfn) !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-i-5.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-i-5.js
new file mode 100644
index 0000000000..34e60b4307
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-i-5.js
@@ -0,0 +1,42 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some - element to be retrieved is own data
+    property that overrides an inherited accessor property on an
+    Array-like object
+---*/
+
+var kValue = 1000;
+
+function callbackfn(val, idx, obj) {
+  if (idx === 0) {
+    return val === kValue;
+  }
+  return false;
+}
+
+var proto = {};
+
+Object.defineProperty(proto, "0", {
+  get: function() {
+    return 5;
+  },
+  configurable: true
+});
+
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+child.length = 2;
+Object.defineProperty(child, "0", {
+  value: kValue,
+  configurable: true
+});
+
+assert(Array.prototype.some.call(child, callbackfn), 'Array.prototype.some.call(child, callbackfn) !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-i-6.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-i-6.js
new file mode 100644
index 0000000000..72335246dc
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-i-6.js
@@ -0,0 +1,29 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some - element to be retrieved is own data
+    property that overrides an inherited accessor property on an Array
+---*/
+
+var kValue = 1000;
+
+function callbackfn(val, idx, obj) {
+  if (idx === 0) {
+    return val === kValue;
+  }
+  return false;
+}
+
+Object.defineProperty(Array.prototype, "0", {
+  get: function() {
+    return 9;
+  },
+  configurable: true
+});
+
+assert([kValue].some(callbackfn), '[kValue].some(callbackfn) !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-i-7.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-i-7.js
new file mode 100644
index 0000000000..dbb1dc4e78
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-i-7.js
@@ -0,0 +1,32 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some - element to be retrieved is inherited data
+    property on an Array-like object
+---*/
+
+var kValue = 'abc';
+
+function callbackfn(val, idx, obj) {
+  if (5 === idx) {
+    return kValue === val;
+  }
+  return false;
+}
+
+var proto = {
+  5: kValue
+};
+
+var Con = function() {};
+Con.prototype = proto;
+
+var child = new Con();
+child.length = 10;
+
+assert(Array.prototype.some.call(child, callbackfn), 'Array.prototype.some.call(child, callbackfn) !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-i-8.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-i-8.js
new file mode 100644
index 0000000000..2a45790a7e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-i-8.js
@@ -0,0 +1,24 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some - element to be retrieved is inherited data
+    property on an Array
+---*/
+
+var kValue = {};
+
+function callbackfn(val, idx, obj) {
+  if (0 === idx) {
+    return kValue === val;
+  }
+  return false;
+}
+
+Array.prototype[0] = kValue;
+
+assert([, ].some(callbackfn), '[, ].some(callbackfn) !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-i-9.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-i-9.js
new file mode 100644
index 0000000000..df00017030
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-i-9.js
@@ -0,0 +1,33 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some - element to be retrieved is own accessor
+    property on an Array-like object
+---*/
+
+var kValue = "abc";
+
+function callbackfn(val, idx, obj) {
+  if (idx === 10) {
+    return val === kValue;
+  }
+  return false;
+}
+
+var obj = {
+  length: 20
+};
+
+Object.defineProperty(obj, "10", {
+  get: function() {
+    return kValue;
+  },
+  configurable: true
+});
+
+assert(Array.prototype.some.call(obj, callbackfn), 'Array.prototype.some.call(obj, callbackfn) !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-ii-1.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-ii-1.js
new file mode 100644
index 0000000000..9237e93517
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-ii-1.js
@@ -0,0 +1,22 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: Array.prototype.some - callbackfn called with correct parameters
+---*/
+
+function callbackfn(val, idx, obj)
+{
+  if (obj[idx] === val)
+    return false;
+  else
+    return true;
+}
+
+var arr = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9];
+
+
+assert.sameValue(arr.some(callbackfn), false, 'arr.some(callbackfn)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-ii-10.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-ii-10.js
new file mode 100644
index 0000000000..4d9508992f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-ii-10.js
@@ -0,0 +1,15 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: Array.prototype.some - callbackfn is called with 1 formal parameter
+---*/
+
+function callbackfn(val) {
+  return val > 10;
+}
+
+assert([11, 12].some(callbackfn), '[11, 12].some(callbackfn) !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-ii-11.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-ii-11.js
new file mode 100644
index 0000000000..2b32d00728
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-ii-11.js
@@ -0,0 +1,15 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: Array.prototype.some - callbackfn is called with 2 formal parameter
+---*/
+
+function callbackfn(val, idx) {
+  return val > 10 && arguments[2][idx] === val;
+}
+
+assert([9, 12].some(callbackfn), '[9, 12].some(callbackfn) !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-ii-12.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-ii-12.js
new file mode 100644
index 0000000000..7863078409
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-ii-12.js
@@ -0,0 +1,15 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: Array.prototype.some - callbackfn is called with 3 formal parameter
+---*/
+
+function callbackfn(val, idx, obj) {
+  return val > 10 && obj[idx] === val;
+}
+
+assert([9, 12].some(callbackfn), '[9, 12].some(callbackfn) !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-ii-13.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-ii-13.js
new file mode 100644
index 0000000000..f4c13f8624
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-ii-13.js
@@ -0,0 +1,17 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some - callbackfn that uses arguments object to
+    get parameter value
+---*/
+
+function callbackfn() {
+  return arguments[2][arguments[1]] === arguments[0];
+}
+
+assert([9, 12].some(callbackfn), '[9, 12].some(callbackfn) !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-ii-16.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-ii-16.js
new file mode 100644
index 0000000000..9212609bc9
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-ii-16.js
@@ -0,0 +1,22 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some - 'this' of 'callback' is a Boolean object
+    when 'T' is not an object ('T' is a boolean primitive)
+---*/
+
+function callbackfn(val, idx, obj) {
+  return this.valueOf() === false;
+}
+
+var obj = {
+  0: 11,
+  length: 1
+};
+
+assert(Array.prototype.some.call(obj, callbackfn, false), 'Array.prototype.some.call(obj, callbackfn, false) !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-ii-17.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-ii-17.js
new file mode 100644
index 0000000000..15bcacc7a4
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-ii-17.js
@@ -0,0 +1,22 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some - 'this' of 'callbackfn' is a Number object
+    when T is not an object (T is a number primitive)
+---*/
+
+function callbackfn(val, idx, obj) {
+  return this.valueOf() === 5;
+}
+
+var obj = {
+  0: 11,
+  length: 1
+};
+
+assert(Array.prototype.some.call(obj, callbackfn, 5), 'Array.prototype.some.call(obj, callbackfn, 5) !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-ii-18.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-ii-18.js
new file mode 100644
index 0000000000..39c12246e8
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-ii-18.js
@@ -0,0 +1,23 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some - 'this' of 'callbackfn' is an String object
+    when T is not an object (T is a string primitive)
+---*/
+
+function callbackfn(val, idx, obj) {
+  return this.valueOf() === "hello!";
+}
+
+var obj = {
+  0: 11,
+  1: 9,
+  length: 2
+};
+
+assert(Array.prototype.some.call(obj, callbackfn, "hello!"), 'Array.prototype.some.call(obj, callbackfn, "hello!") !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-ii-19.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-ii-19.js
new file mode 100644
index 0000000000..0ddd9a122f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-ii-19.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: Array.prototype.some - non-indexed properties are not called
+---*/
+
+var called = 0;
+
+function callbackfn(val, idx, obj) {
+  called++;
+  return val === 11;
+}
+
+var obj = {
+  0: 9,
+  10: 8,
+  non_index_property: 11,
+  length: 20
+};
+
+assert.sameValue(Array.prototype.some.call(obj, callbackfn), false, 'Array.prototype.some.call(obj, callbackfn)');
+assert.sameValue(called, 2, 'called');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-ii-2.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-ii-2.js
new file mode 100644
index 0000000000..d790c0d9d8
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-ii-2.js
@@ -0,0 +1,23 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: Array.prototype.some - callbackfn takes 3 arguments
+---*/
+
+function callbackfn(val, idx, obj)
+{
+  if (arguments.length === 3) //verify if callbackfn was called with 3 parameters
+    return false;
+  else
+    return true;
+}
+
+var arr = [0, 1, true, null, new Object(), "five"];
+arr[999999] = -6.6;
+
+
+assert.sameValue(arr.some(callbackfn), false, 'arr.some(callbackfn)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-ii-20.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-ii-20.js
new file mode 100644
index 0000000000..7f3af49e48
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-ii-20.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some - callbackfn called with correct parameters
+    (thisArg is correct)
+---*/
+
+var thisArg = {
+  threshold: 10
+};
+
+function callbackfn(val, idx, obj) {
+  return this === thisArg;
+}
+
+var obj = {
+  0: 11,
+  length: 2
+};
+
+assert(Array.prototype.some.call(obj, callbackfn, thisArg), 'Array.prototype.some.call(obj, callbackfn, thisArg) !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-ii-21.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-ii-21.js
new file mode 100644
index 0000000000..de229bed17
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-ii-21.js
@@ -0,0 +1,35 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some - callbackfn called with correct parameters
+    (kValue is correct)
+---*/
+
+var firstIndex = false;
+var secondIndex = false;
+
+function callbackfn(val, idx, obj) {
+  if (idx === 0) {
+    firstIndex = (val === 11);
+    return false;
+  }
+  if (idx === 1) {
+    secondIndex = (val === 12);
+    return false;
+  }
+}
+
+var obj = {
+  0: 11,
+  1: 12,
+  length: 2
+};
+
+assert.sameValue(Array.prototype.some.call(obj, callbackfn), false, 'Array.prototype.some.call(obj, callbackfn)');
+assert(firstIndex, 'firstIndex !== true');
+assert(secondIndex, 'secondIndex !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-ii-22.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-ii-22.js
new file mode 100644
index 0000000000..ff3b2ef5a5
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-ii-22.js
@@ -0,0 +1,35 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some - callbackfn called with correct parameters
+    (the index k is correct)
+---*/
+
+var firstIndex = false;
+var secondIndex = false;
+
+function callbackfn(val, idx, obj) {
+  if (val === 11) {
+    firstIndex = (idx === 0);
+    return false;
+  }
+  if (val === 12) {
+    secondIndex = (idx === 1);
+    return false;
+  }
+}
+
+var obj = {
+  0: 11,
+  1: 12,
+  length: 2
+};
+
+assert.sameValue(Array.prototype.some.call(obj, callbackfn), false, 'Array.prototype.some.call(obj, callbackfn)');
+assert(firstIndex, 'firstIndex !== true');
+assert(secondIndex, 'secondIndex !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-ii-23.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-ii-23.js
new file mode 100644
index 0000000000..9593217eff
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-ii-23.js
@@ -0,0 +1,23 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some - callbackfn called with correct parameters
+    (this object O is correct)
+---*/
+
+var obj = {
+  0: 11,
+  1: 12,
+  length: 2
+};
+
+function callbackfn(val, idx, o) {
+  return obj === o;
+}
+
+assert(Array.prototype.some.call(obj, callbackfn), 'Array.prototype.some.call(obj, callbackfn) !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-ii-3.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-ii-3.js
new file mode 100644
index 0000000000..4b67ca2d5c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-ii-3.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some immediately returns true if callbackfn
+    returns true
+---*/
+
+var callCnt = 0;
+
+function callbackfn(val, idx, obj)
+{
+  callCnt++;
+  if (idx > 5)
+    return true;
+  else
+    return false;
+}
+
+var arr = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9];
+
+
+assert.sameValue(arr.some(callbackfn), true, 'arr.some(callbackfn)');
+assert.sameValue(callCnt, 7, 'callCnt');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-ii-4.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-ii-4.js
new file mode 100644
index 0000000000..f86b680bea
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-ii-4.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some - k values are passed in ascending numeric
+    order
+---*/
+
+var arr = [0, 1, 2, 3, 4, 5];
+var lastIdx = 0;
+var called = 0;
+
+function callbackfn(val, idx, o) {
+  called++;
+  if (lastIdx !== idx) {
+    return true;
+  } else {
+    lastIdx++;
+    return false;
+  }
+}
+
+assert.sameValue(arr.some(callbackfn), false, 'arr.some(callbackfn)');
+assert.sameValue(arr.length, called, 'arr.length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-ii-5.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-ii-5.js
new file mode 100644
index 0000000000..af59cc4bd5
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-ii-5.js
@@ -0,0 +1,30 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some - k values are accessed during each iteration
+    and not prior to starting the loop
+---*/
+
+var kIndex = [];
+
+//By below way, we could verify that k would be setted as 0, 1, ..., length - 1 in order, and each value will be setted one time.
+function callbackfn(val, idx, obj) {
+  //Each position should be visited one time, which means k is accessed one time during iterations.
+  if (typeof kIndex[idx] === "undefined") {
+    //when current position is visited, its previous index should has been visited.
+    if (idx !== 0 && typeof kIndex[idx - 1] === "undefined") {
+      return true;
+    }
+    kIndex[idx] = 1;
+    return false;
+  } else {
+    return true;
+  }
+}
+
+assert.sameValue([11, 12, 13, 14].some(callbackfn, undefined), false, '[11, 12, 13, 14].some(callbackfn, undefined)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-ii-6.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-ii-6.js
new file mode 100644
index 0000000000..439922d525
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-ii-6.js
@@ -0,0 +1,21 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: Array.prototype.some - arguments to callbackfn are self consistent
+---*/
+
+var obj = {
+  0: 11,
+  length: 1
+};
+var thisArg = {};
+
+function callbackfn() {
+  return this === thisArg && arguments[0] === 11 && arguments[1] === 0 && arguments[2] === obj;
+}
+
+assert(Array.prototype.some.call(obj, callbackfn, thisArg), 'Array.prototype.some.call(obj, callbackfn, thisArg) !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-ii-7.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-ii-7.js
new file mode 100644
index 0000000000..424bdad9f9
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-ii-7.js
@@ -0,0 +1,34 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some - unhandled exceptions happened in callbackfn
+    terminate iteration
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  if (idx > 0) {
+    accessed = true;
+  }
+  if (idx === 0) {
+    throw new Error("Exception occurred in callbackfn");
+  }
+  return false;
+}
+
+var obj = {
+  0: 9,
+  1: 100,
+  10: 11,
+  length: 20
+};
+assert.throws(Error, function() {
+  Array.prototype.some.call(obj, callbackfn);
+});
+assert.sameValue(accessed, false, 'accessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-ii-8.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-ii-8.js
new file mode 100644
index 0000000000..d1d0e59d0b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-ii-8.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some - element changed by callbackfn on previous
+    iterations is observed
+---*/
+
+function callbackfn(val, idx, obj) {
+  if (idx === 0) {
+    obj[idx + 1] = 11;
+  }
+  return val > 10;
+}
+
+var obj = {
+  0: 9,
+  1: 8,
+  length: 2
+};
+
+assert(Array.prototype.some.call(obj, callbackfn), 'Array.prototype.some.call(obj, callbackfn) !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-ii-9.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-ii-9.js
new file mode 100644
index 0000000000..21e425cfa3
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-ii-9.js
@@ -0,0 +1,15 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: Array.prototype.some - callbackfn is called with 0 formal parameter
+---*/
+
+function callbackfn() {
+  return true;
+}
+
+assert([11, 12].some(callbackfn), '[11, 12].some(callbackfn) !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-iii-1.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-iii-1.js
new file mode 100644
index 0000000000..8b20b97e34
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-iii-1.js
@@ -0,0 +1,24 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: Array.prototype.some - return value of callbackfn is undefined
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return undefined;
+}
+
+var obj = {
+  0: 11,
+  length: 2
+};
+
+assert.sameValue(Array.prototype.some.call(obj, callbackfn), false, 'Array.prototype.some.call(obj, callbackfn)');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-iii-10.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-iii-10.js
new file mode 100644
index 0000000000..0d3d412585
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-iii-10.js
@@ -0,0 +1,17 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some - return value of callbackfn is a number
+    (value is Infinity)
+---*/
+
+function callbackfn(val, idx, obj) {
+  return Infinity;
+}
+
+assert([11].some(callbackfn), '[11].some(callbackfn) !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-iii-11.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-iii-11.js
new file mode 100644
index 0000000000..c595f486cc
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-iii-11.js
@@ -0,0 +1,17 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some - return value of callbackfn is a number
+    (value is -Infinity)
+---*/
+
+function callbackfn(val, idx, obj) {
+  return -Infinity;
+}
+
+assert([11].some(callbackfn), '[11].some(callbackfn) !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-iii-12.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-iii-12.js
new file mode 100644
index 0000000000..a49cebbbd8
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-iii-12.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some - return value of callbackfn is a number
+    (value is NaN)
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return NaN;
+}
+
+assert.sameValue([11].some(callbackfn), false, '[11].some(callbackfn)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-iii-13.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-iii-13.js
new file mode 100644
index 0000000000..50d47f4d95
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-iii-13.js
@@ -0,0 +1,21 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some - return value of callbackfn is an empty
+    string
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return "";
+}
+
+assert.sameValue([11].some(callbackfn), false, '[11].some(callbackfn)');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-iii-14.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-iii-14.js
new file mode 100644
index 0000000000..36e3e63669
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-iii-14.js
@@ -0,0 +1,17 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some - return value of callbackfn is a non-empty
+    string
+---*/
+
+function callbackfn(val, idx, obj) {
+  return "non-empty string";
+}
+
+assert([11].some(callbackfn), '[11].some(callbackfn) !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-iii-15.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-iii-15.js
new file mode 100644
index 0000000000..e723c0a03b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-iii-15.js
@@ -0,0 +1,17 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some - return value of callbackfn is Function
+    object
+---*/
+
+function callbackfn(val, idx, obj) {
+  return function() {};
+}
+
+assert([11].some(callbackfn), '[11].some(callbackfn) !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-iii-16.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-iii-16.js
new file mode 100644
index 0000000000..a9d3fd03aa
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-iii-16.js
@@ -0,0 +1,17 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some - return value of callbackfn is an Array
+    object
+---*/
+
+function callbackfn(val, idx, obj) {
+  return new Array(10);
+}
+
+assert([11].some(callbackfn), '[11].some(callbackfn) !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-iii-17.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-iii-17.js
new file mode 100644
index 0000000000..a66052bd57
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-iii-17.js
@@ -0,0 +1,17 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some - return value of callbackfn is a String
+    object
+---*/
+
+function callbackfn(val, idx, obj) {
+  return new String();
+}
+
+assert([11].some(callbackfn), '[11].some(callbackfn) !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-iii-18.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-iii-18.js
new file mode 100644
index 0000000000..39d4b1abd6
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-iii-18.js
@@ -0,0 +1,17 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some - return value of callbackfn is a Boolean
+    object
+---*/
+
+function callbackfn(val, idx, obj) {
+  return new Boolean();
+}
+
+assert([11].some(callbackfn), '[11].some(callbackfn) !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-iii-19.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-iii-19.js
new file mode 100644
index 0000000000..7912be6aab
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-iii-19.js
@@ -0,0 +1,17 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some - return value of callbackfn is a Number
+    object
+---*/
+
+function callbackfn(val, idx, obj) {
+  return new Number();
+}
+
+assert([11].some(callbackfn), '[11].some(callbackfn) !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-iii-2.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-iii-2.js
new file mode 100644
index 0000000000..8afd00913c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-iii-2.js
@@ -0,0 +1,24 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: Array.prototype.some - return value of callbackfn is null
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return null;
+}
+
+var obj = {
+  0: 11,
+  length: 2
+};
+
+assert.sameValue(Array.prototype.some.call(obj, callbackfn), false, 'Array.prototype.some.call(obj, callbackfn)');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-iii-20.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-iii-20.js
new file mode 100644
index 0000000000..14524e58d3
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-iii-20.js
@@ -0,0 +1,17 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some - return value of callbackfn is the Math
+    object
+---*/
+
+function callbackfn(val, idx, obj) {
+  return Math;
+}
+
+assert([11].some(callbackfn), '[11].some(callbackfn) !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-iii-21.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-iii-21.js
new file mode 100644
index 0000000000..7a3113dc94
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-iii-21.js
@@ -0,0 +1,15 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: Array.prototype.some - return value of callbackfn is a Date object
+---*/
+
+function callbackfn(val, idx, obj) {
+  return new Date();
+}
+
+assert([11].some(callbackfn), '[11].some(callbackfn) !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-iii-22.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-iii-22.js
new file mode 100644
index 0000000000..80c0331b73
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-iii-22.js
@@ -0,0 +1,17 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some - return value of callbackfn is a RegExp
+    object
+---*/
+
+function callbackfn(val, idx, obj) {
+  return new RegExp();
+}
+
+assert([11].some(callbackfn), '[11].some(callbackfn) !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-iii-23.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-iii-23.js
new file mode 100644
index 0000000000..1f93886842
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-iii-23.js
@@ -0,0 +1,17 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some - return value of callbackfn is the JSON
+    object
+---*/
+
+function callbackfn(val, idx, obj) {
+  return JSON;
+}
+
+assert([11].some(callbackfn), '[11].some(callbackfn) !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-iii-24.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-iii-24.js
new file mode 100644
index 0000000000..7be613c304
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-iii-24.js
@@ -0,0 +1,17 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some - return value of callbackfn is an Error
+    object
+---*/
+
+function callbackfn(val, idx, obj) {
+  return new EvalError();
+}
+
+assert([11].some(callbackfn), '[11].some(callbackfn) !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-iii-25.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-iii-25.js
new file mode 100644
index 0000000000..954bf4351b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-iii-25.js
@@ -0,0 +1,17 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some - return value of callbackfn is the Arguments
+    object
+---*/
+
+function callbackfn(val, idx, obj) {
+  return arguments;
+}
+
+assert([11].some(callbackfn), '[11].some(callbackfn) !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-iii-26.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-iii-26.js
new file mode 100644
index 0000000000..4b1d75d24f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-iii-26.js
@@ -0,0 +1,19 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some - return value of callbackfn is the global
+    object
+---*/
+
+var global = this;
+
+function callbackfn(val, idx, obj) {
+  return global;
+}
+
+assert([11].some(callbackfn), '[11].some(callbackfn) !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-iii-28.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-iii-28.js
new file mode 100644
index 0000000000..b324d55630
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-iii-28.js
@@ -0,0 +1,47 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: Array.prototype.some - true prevents further side effects
+---*/
+
+var result = false;
+
+function callbackfn(val, idx, obj) {
+  if (idx > 1) {
+    result = true;
+  }
+  return val > 10;
+}
+
+var obj = {
+  length: 20
+};
+
+Object.defineProperty(obj, "0", {
+  get: function() {
+    return 8;
+  },
+  configurable: true
+});
+
+Object.defineProperty(obj, "1", {
+  get: function() {
+    return 11;
+  },
+  configurable: true
+});
+
+Object.defineProperty(obj, "2", {
+  get: function() {
+    result = true;
+    return 11;
+  },
+  configurable: true
+});
+
+assert(Array.prototype.some.call(obj, callbackfn), 'Array.prototype.some.call(obj, callbackfn) !== true');
+assert.sameValue(result, false, 'result');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-iii-29.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-iii-29.js
new file mode 100644
index 0000000000..ad0377ef5b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-iii-29.js
@@ -0,0 +1,17 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some - return value (new Boolean(false)) of
+    callbackfn is treated as true value
+---*/
+
+function callbackfn() {
+  return new Boolean(false);
+}
+
+assert([11].some(callbackfn), '[11].some(callbackfn) !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-iii-3.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-iii-3.js
new file mode 100644
index 0000000000..2cedc30bd6
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-iii-3.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some - return value of callbackfn is a boolean
+    (value is false)
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return false;
+}
+
+var obj = {
+  0: 11,
+  length: 2
+};
+
+assert.sameValue(Array.prototype.some.call(obj, callbackfn), false, 'Array.prototype.some.call(obj, callbackfn)');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-iii-4.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-iii-4.js
new file mode 100644
index 0000000000..35e1dd57b6
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-iii-4.js
@@ -0,0 +1,22 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some - return value of callbackfn is a boolean
+    (value is true)
+---*/
+
+function callbackfn(val, idx, obj) {
+  return true;
+}
+
+var obj = {
+  0: 11,
+  length: 2
+};
+
+assert(Array.prototype.some.call(obj, callbackfn), 'Array.prototype.some.call(obj, callbackfn) !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-iii-5.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-iii-5.js
new file mode 100644
index 0000000000..c734f493fd
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-iii-5.js
@@ -0,0 +1,21 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some - return value of callbackfn is a number
+    (value is 0)
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return 0;
+}
+
+assert.sameValue([11].some(callbackfn), false, '[11].some(callbackfn)');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-iii-6.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-iii-6.js
new file mode 100644
index 0000000000..3b5808297a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-iii-6.js
@@ -0,0 +1,21 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some - return value of callbackfn is a number
+    (value is +0)
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return +0;
+}
+
+assert.sameValue([11].some(callbackfn), false, '[11].some(callbackfn)');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-iii-7.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-iii-7.js
new file mode 100644
index 0000000000..b27bbc2dac
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-iii-7.js
@@ -0,0 +1,21 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some - return value of callbackfn is a number
+    (value is -0)
+---*/
+
+var accessed = false;
+
+function callbackfn(val, idx, obj) {
+  accessed = true;
+  return -0;
+}
+
+assert.sameValue([11].some(callbackfn), false, '[11].some(callbackfn)');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-iii-8.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-iii-8.js
new file mode 100644
index 0000000000..04fe2776e6
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-iii-8.js
@@ -0,0 +1,17 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some - return value of callbackfn is a number
+    (value is positive number)
+---*/
+
+function callbackfn(val, idx, obj) {
+  return 5;
+}
+
+assert([11].some(callbackfn), '[11].some(callbackfn) !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-iii-9.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-iii-9.js
new file mode 100644
index 0000000000..3b4b4ff0c4
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-7-c-iii-9.js
@@ -0,0 +1,17 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some - return value of callbackfn is a number
+    (value is negative number)
+---*/
+
+function callbackfn(val, idx, obj) {
+  return -5;
+}
+
+assert([11].some(callbackfn), '[11].some(callbackfn) !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-8-1.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-8-1.js
new file mode 100644
index 0000000000..ac586cce1b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-8-1.js
@@ -0,0 +1,14 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: Array.prototype.some returns false if 'length' is 0 (empty array)
+---*/
+
+function cb() {}
+var i = [].some(cb);
+
+assert.sameValue(i, false, 'i');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-8-10.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-8-10.js
new file mode 100644
index 0000000000..75e26d272c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-8-10.js
@@ -0,0 +1,27 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: Array.prototype.some - subclassed array when length is reduced
+---*/
+
+foo.prototype = new Array(1, 2, 3);
+
+function foo() {}
+var f = new foo();
+f.length = 2;
+
+function cb(val)
+{
+  if (val > 2)
+    return true;
+  else
+    return false;
+}
+var i = f.some(cb);
+
+
+assert.sameValue(i, false, 'i');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-8-11.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-8-11.js
new file mode 100644
index 0000000000..6b99c3592d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-8-11.js
@@ -0,0 +1,25 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some returns false when all calls to callbackfn
+    return false
+---*/
+
+var callCnt = 0;
+
+function callbackfn(val, idx, obj)
+{
+  callCnt++;
+  return false;
+}
+
+var arr = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9];
+
+
+assert.sameValue(arr.some(callbackfn), false, 'arr.some(callbackfn)');
+assert.sameValue(callCnt, 10, 'callCnt');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-8-12.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-8-12.js
new file mode 100644
index 0000000000..bc2dd24423
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-8-12.js
@@ -0,0 +1,24 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some doesn't mutate the array on which it is
+    called on
+---*/
+
+function callbackfn(val, idx, obj)
+{
+  return true;
+}
+var arr = [1, 2, 3, 4, 5];
+arr.some(callbackfn);
+
+assert.sameValue(arr[0], 1, 'arr[0]');
+assert.sameValue(arr[1], 2, 'arr[1]');
+assert.sameValue(arr[2], 3, 'arr[2]');
+assert.sameValue(arr[3], 4, 'arr[3]');
+assert.sameValue(arr[4], 5, 'arr[4]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-8-13.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-8-13.js
new file mode 100644
index 0000000000..db3ffc740e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-8-13.js
@@ -0,0 +1,25 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: Array.prototype.some doesn't visit expandos
+---*/
+
+var callCnt = 0;
+
+function callbackfn(val, idx, obj)
+{
+  callCnt++;
+  return false;
+}
+
+var arr = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9];
+arr["i"] = 10;
+arr[true] = 11;
+
+
+assert.sameValue(arr.some(callbackfn), false, 'arr.some(callbackfn)');
+assert.sameValue(callCnt, 10, 'callCnt');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-8-2.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-8-2.js
new file mode 100644
index 0000000000..1a0b486a2f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-8-2.js
@@ -0,0 +1,23 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some returns false if 'length' is 0 (subclassed
+    Array, length overridden to null (type conversion))
+---*/
+
+foo.prototype = new Array(1, 2, 3);
+
+function foo() {}
+var f = new foo();
+f.length = null;
+
+function cb() {}
+var i = f.some(cb);
+
+
+assert.sameValue(i, false, 'i');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-8-3.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-8-3.js
new file mode 100644
index 0000000000..4a38a24b1b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-8-3.js
@@ -0,0 +1,23 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some returns false if 'length' is 0 (subclassed
+    Array, length overridden to false (type conversion))
+---*/
+
+foo.prototype = new Array(1, 2, 3);
+
+function foo() {}
+var f = new foo();
+f.length = false;
+
+function cb() {}
+var i = f.some(cb);
+
+
+assert.sameValue(i, false, 'i');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-8-4.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-8-4.js
new file mode 100644
index 0000000000..aface909a8
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-8-4.js
@@ -0,0 +1,23 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some returns false if 'length' is 0 (subclassed
+    Array, length overridden to 0 (type conversion))
+---*/
+
+foo.prototype = new Array(1, 2, 3);
+
+function foo() {}
+var f = new foo();
+f.length = 0;
+
+function cb() {}
+var i = f.some(cb);
+
+
+assert.sameValue(i, false, 'i');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-8-5.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-8-5.js
new file mode 100644
index 0000000000..59e2e53391
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-8-5.js
@@ -0,0 +1,23 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some returns false if 'length' is 0 (subclassed
+    Array, length overridden to '0' (type conversion))
+---*/
+
+foo.prototype = new Array(1, 2, 3);
+
+function foo() {}
+var f = new foo();
+f.length = '0';
+
+function cb() {}
+var i = f.some(cb);
+
+
+assert.sameValue(i, false, 'i');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-8-6.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-8-6.js
new file mode 100644
index 0000000000..b3294f99f0
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-8-6.js
@@ -0,0 +1,29 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some returns false if 'length' is 0 (subclassed
+    Array, length overridden with obj with valueOf)
+---*/
+
+foo.prototype = new Array(1, 2, 3);
+
+function foo() {}
+var f = new foo();
+
+var o = {
+  valueOf: function() {
+    return 0;
+  }
+};
+f.length = o;
+
+function cb() {}
+var i = f.some(cb);
+
+
+assert.sameValue(i, false, 'i');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-8-7.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-8-7.js
new file mode 100644
index 0000000000..b8fbd51b3b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-8-7.js
@@ -0,0 +1,35 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some returns false if 'length' is 0 (subclassed
+    Array, length overridden with obj w/o valueOf (toString))
+---*/
+
+foo.prototype = new Array(1, 2, 3);
+
+function foo() {}
+var f = new foo();
+
+var o = {
+  toString: function() {
+    return '0';
+  }
+};
+f.length = o;
+
+// objects inherit the default valueOf method of the Object object;
+// that simply returns the itself. Since the default valueOf() method
+// does not return a primitive value, ES next tries to convert the object
+// to a number by calling its toString() method and converting the
+// resulting string to a number.
+
+function cb() {}
+var i = f.some(cb);
+
+
+assert.sameValue(i, false, 'i');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-8-8.js b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-8-8.js
new file mode 100644
index 0000000000..fdf21af1af
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/15.4.4.17-8-8.js
@@ -0,0 +1,38 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+    Array.prototype.some returns false if 'length' is 0 (subclassed
+    Array, length overridden with []
+---*/
+
+foo.prototype = new Array(1, 2, 3);
+
+function foo() {}
+var f = new foo();
+
+f.length = [];
+
+// objects inherit the default valueOf method of the Object object;
+// that simply returns the itself. Since the default valueOf() method
+// does not return a primitive value, ES next tries to convert the object
+// to a number by calling its toString() method and converting the
+// resulting string to a number.
+//
+// The toString( ) method on Array converts the array elements to strings,
+// then returns the result of concatenating these strings, with commas in
+// between. An array with no elements converts to the empty string, which
+// converts to the number 0. If an array has a single element that is a
+// number n, the array converts to a string representation of n, which is
+// then converted back to n itself. If an array contains more than one element,
+// or if its one element is not a number, the array converts to NaN.
+
+function cb() {}
+var i = f.some(cb);
+
+
+assert.sameValue(i, false, 'i');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/browser.js b/js/src/tests/test262/built-ins/Array/prototype/some/browser.js
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/call-with-boolean.js b/js/src/tests/test262/built-ins/Array/prototype/some/call-with-boolean.js
new file mode 100644
index 0000000000..755711e5ea
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/call-with-boolean.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2020 Rick Waldron.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: Array.prototype.some applied to boolean primitive
+---*/
+
+assert.sameValue(
+  Array.prototype.some.call(true, () => {}),
+  false,
+  'Array.prototype.some.call(true, () => {}) must return false'
+);
+assert.sameValue(
+  Array.prototype.some.call(false, () => {}),
+  false,
+  'Array.prototype.some.call(false, () => {}) must return false'
+);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/callbackfn-resize-arraybuffer.js b/js/src/tests/test262/built-ins/Array/prototype/some/callbackfn-resize-arraybuffer.js
new file mode 100644
index 0000000000..0f42d15717
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/callbackfn-resize-arraybuffer.js
@@ -0,0 +1,74 @@
+// |reftest| shell-option(--enable-arraybuffer-resizable) skip-if(!ArrayBuffer.prototype.resize||!xulRuntime.shell) -- resizable-arraybuffer is not enabled unconditionally, requires shell-options
+// Copyright (C) 2021 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.some
+description: TypedArray instance buffer can be resized during iteration
+includes: [testTypedArray.js, compareArray.js]
+features: [TypedArray, resizable-arraybuffer]
+---*/
+
+// If the host chooses to throw as allowed by the specification, the observed
+// behavior will be identical to the case where `ArrayBuffer.prototype.resize`
+// has not been implemented. The following assertion prevents this test from
+// passing in runtimes which have not implemented the method.
+assert.sameValue(typeof ArrayBuffer.prototype.resize, 'function');
+
+testWithTypedArrayConstructors(function(TA) {
+  var BPE = TA.BYTES_PER_ELEMENT;
+  var buffer = new ArrayBuffer(BPE * 3, {maxByteLength: BPE * 4});
+  var sample = new TA(buffer);
+  var expectedElements, expectedIndices, expectedArrays;
+  var elements, indices, arrays, result;
+
+  elements = [];
+  indices = [];
+  arrays = [];
+  result = Array.prototype.some.call(sample, function(element, index, array) {
+    if (elements.length === 0) {
+      try {
+        buffer.resize(2 * BPE);
+        expectedElements = [0, 0];
+        expectedIndices = [0, 1];
+        expectedArrays = [sample, sample];
+      } catch (_) {
+        expectedElements = [0, 0, 0];
+        expectedIndices = [0, 1, 2];
+        expectedArrays = [sample, sample, sample];
+      }
+    }
+
+    elements.push(element);
+    indices.push(index);
+    arrays.push(array);
+    return false;
+  });
+
+  assert.compareArray(elements, expectedElements, 'elements (shrink)');
+  assert.compareArray(indices, expectedIndices, 'indices (shrink)');
+  assert.compareArray(arrays, expectedArrays, 'arrays (shrink)');
+  assert.sameValue(result, false, 'result (shrink)');
+
+  elements = [];
+  indices = [];
+  arrays = [];
+  result = Array.prototype.some.call(sample, function(element, index, array) {
+    if (elements.length === 0) {
+      try {
+        buffer.resize(4 * BPE);
+      } catch (_) {}
+    }
+
+    elements.push(element);
+    indices.push(index);
+    arrays.push(array);
+    return false;
+  });
+
+  assert.compareArray(elements, expectedElements, 'elements (grow)');
+  assert.compareArray(indices, expectedIndices, 'indices (grow)');
+  assert.compareArray(arrays, expectedArrays, 'arrays (grow)');
+  assert.sameValue(result, false, 'result (grow)');
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/length.js b/js/src/tests/test262/built-ins/Array/prototype/some/length.js
new file mode 100644
index 0000000000..4afccd4124
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/length.js
@@ -0,0 +1,30 @@
+// Copyright (C) 2017 Leo Balter. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+  The "length" property of Array.prototype.some
+info: |
+  17 ECMAScript Standard Built-in Objects
+
+  Every built-in function object, including constructors, has a length property
+  whose value is an integer. Unless otherwise specified, this value is equal to
+  the largest number of named arguments shown in the subclause headings for the
+  function description. Optional parameters (which are indicated with brackets:
+  [ ]) or rest parameters (which are shown using the form «...name») are not
+  included in the default argument count.
+
+  Unless otherwise specified, the length property of a built-in function object
+  has the attributes { [[Writable]]: false, [[Enumerable]]: false,
+    [[Configurable]]: true }.
+includes: [propertyHelper.js]
+---*/
+
+assert.sameValue(Array.prototype.some.length, 1);
+
+verifyNotEnumerable(Array.prototype.some, 'length');
+verifyNotWritable(Array.prototype.some, 'length');
+verifyConfigurable(Array.prototype.some, 'length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/name.js b/js/src/tests/test262/built-ins/Array/prototype/some/name.js
new file mode 100644
index 0000000000..3ccefd3f61
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/name.js
@@ -0,0 +1,28 @@
+// Copyright (C) 2015 André Bargull. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+  Array.prototype.some.name is "some".
+info: |
+  Array.prototype.some ( callbackfn [ , thisArg ] )
+
+  17 ECMAScript Standard Built-in Objects:
+    Every built-in Function object, including constructors, that is not
+    identified as an anonymous function has a name property whose value
+    is a String.
+
+    Unless otherwise specified, the name property of a built-in Function
+    object, if it exists, has the attributes { [[Writable]]: false,
+    [[Enumerable]]: false, [[Configurable]]: true }.
+includes: [propertyHelper.js]
+---*/
+
+assert.sameValue(Array.prototype.some.name, "some");
+
+verifyNotEnumerable(Array.prototype.some, "name");
+verifyNotWritable(Array.prototype.some, "name");
+verifyConfigurable(Array.prototype.some, "name");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/not-a-constructor.js b/js/src/tests/test262/built-ins/Array/prototype/some/not-a-constructor.js
new file mode 100644
index 0000000000..cff54f8d96
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/not-a-constructor.js
@@ -0,0 +1,31 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Array.prototype.some does not implement [[Construct]], is not new-able
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+
+  sec-evaluatenew
+
+  ...
+  7. If IsConstructor(constructor) is false, throw a TypeError exception.
+  ...
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(isConstructor(Array.prototype.some), false, 'isConstructor(Array.prototype.some) must return false');
+
+assert.throws(TypeError, () => {
+  new Array.prototype.some(() => {});
+}, '`new Array.prototype.some(() => {})` throws TypeError');
+
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/prop-desc.js b/js/src/tests/test262/built-ins/Array/prototype/some/prop-desc.js
new file mode 100644
index 0000000000..31c84e6a9b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/prop-desc.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2017 Leo Balter. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.some
+description: >
+  "some" property of Array.prototype
+info: |
+  17 ECMAScript Standard Built-in Objects
+  
+  Every other data property described in clauses 18 through 26 and in Annex B.2
+  has the attributes { [[Writable]]: true, [[Enumerable]]: false,
+    [[Configurable]]: true } unless otherwise specified.
+includes: [propertyHelper.js]
+---*/
+
+assert.sameValue(typeof Array.prototype.some, 'function', 'typeof');
+
+verifyNotEnumerable(Array.prototype, "some");
+verifyWritable(Array.prototype, "some");
+verifyConfigurable(Array.prototype, "some");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/some/shell.js b/js/src/tests/test262/built-ins/Array/prototype/some/shell.js
new file mode 100644
index 0000000000..05fecd6ef1
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/some/shell.js
@@ -0,0 +1,161 @@
+// GENERATED, DO NOT EDIT
+// file: testTypedArray.js
+// Copyright (C) 2015 André Bargull. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+description: |
+    Collection of functions used to assert the correctness of TypedArray objects.
+defines:
+  - floatArrayConstructors
+  - nonClampedIntArrayConstructors
+  - intArrayConstructors
+  - typedArrayConstructors
+  - TypedArray
+  - testWithTypedArrayConstructors
+  - nonAtomicsFriendlyTypedArrayConstructors
+  - testWithAtomicsFriendlyTypedArrayConstructors
+  - testWithNonAtomicsFriendlyTypedArrayConstructors
+  - testTypedArrayConversions
+---*/
+
+var floatArrayConstructors = [
+  Float64Array,
+  Float32Array
+];
+
+var nonClampedIntArrayConstructors = [
+  Int32Array,
+  Int16Array,
+  Int8Array,
+  Uint32Array,
+  Uint16Array,
+  Uint8Array
+];
+
+var intArrayConstructors = nonClampedIntArrayConstructors.concat([Uint8ClampedArray]);
+
+// Float16Array is a newer feature
+// adding it to this list unconditionally would cause implementations lacking it to fail every test which uses it
+if (typeof Float16Array !== 'undefined') {
+  floatArrayConstructors.push(Float16Array);
+}
+
+/**
+ * Array containing every non-bigint typed array constructor.
+ */
+
+var typedArrayConstructors = floatArrayConstructors.concat(intArrayConstructors);
+
+/**
+ * The %TypedArray% intrinsic constructor function.
+ */
+var TypedArray = Object.getPrototypeOf(Int8Array);
+
+/**
+ * Callback for testing a typed array constructor.
+ *
+ * @callback typedArrayConstructorCallback
+ * @param {Function} Constructor the constructor object to test with.
+ */
+
+/**
+ * Calls the provided function for every typed array constructor.
+ *
+ * @param {typedArrayConstructorCallback} f - the function to call for each typed array constructor.
+ * @param {Array} selected - An optional Array with filtered typed arrays
+ */
+function testWithTypedArrayConstructors(f, selected) {
+  var constructors = selected || typedArrayConstructors;
+  for (var i = 0; i < constructors.length; ++i) {
+    var constructor = constructors[i];
+    try {
+      f(constructor);
+    } catch (e) {
+      e.message += " (Testing with " + constructor.name + ".)";
+      throw e;
+    }
+  }
+}
+
+var nonAtomicsFriendlyTypedArrayConstructors = floatArrayConstructors.concat([Uint8ClampedArray]);
+/**
+ * Calls the provided function for every non-"Atomics Friendly" typed array constructor.
+ *
+ * @param {typedArrayConstructorCallback} f - the function to call for each typed array constructor.
+ * @param {Array} selected - An optional Array with filtered typed arrays
+ */
+function testWithNonAtomicsFriendlyTypedArrayConstructors(f) {
+  testWithTypedArrayConstructors(f, nonAtomicsFriendlyTypedArrayConstructors);
+}
+
+/**
+ * Calls the provided function for every "Atomics Friendly" typed array constructor.
+ *
+ * @param {typedArrayConstructorCallback} f - the function to call for each typed array constructor.
+ * @param {Array} selected - An optional Array with filtered typed arrays
+ */
+function testWithAtomicsFriendlyTypedArrayConstructors(f) {
+  testWithTypedArrayConstructors(f, [
+    Int32Array,
+    Int16Array,
+    Int8Array,
+    Uint32Array,
+    Uint16Array,
+    Uint8Array,
+  ]);
+}
+
+/**
+ * Helper for conversion operations on TypedArrays, the expected values
+ * properties are indexed in order to match the respective value for each
+ * TypedArray constructor
+ * @param  {Function} fn - the function to call for each constructor and value.
+ *                         will be called with the constructor, value, expected
+ *                         value, and a initial value that can be used to avoid
+ *                         a false positive with an equivalent expected value.
+ */
+function testTypedArrayConversions(byteConversionValues, fn) {
+  var values = byteConversionValues.values;
+  var expected = byteConversionValues.expected;
+
+  testWithTypedArrayConstructors(function(TA) {
+    var name = TA.name.slice(0, -5);
+
+    return values.forEach(function(value, index) {
+      var exp = expected[name][index];
+      var initial = 0;
+      if (exp === 0) {
+        initial = 1;
+      }
+      fn(TA, value, exp, initial);
+    });
+  });
+}
+
+/**
+ * Checks if the given argument is one of the float-based TypedArray constructors.
+ *
+ * @param {constructor} ctor - the value to check
+ * @returns {boolean}
+ */
+function isFloatTypedArrayConstructor(arg) {
+  return floatArrayConstructors.indexOf(arg) !== -1;
+}
+
+/**
+ * Determines the precision of the given float-based TypedArray constructor.
+ *
+ * @param {constructor} ctor - the value to check
+ * @returns {string} "half", "single", or "double" for Float16Array, Float32Array, and Float64Array respectively.
+ */
+function floatTypedArrayConstructorPrecision(FA) {
+  if (typeof Float16Array !== "undefined" && FA === Float16Array) {
+    return "half";
+  } else if (FA === Float32Array) {
+    return "single";
+  } else if (FA === Float64Array) {
+    return "double";
+  } else {
+    throw new Error("Malformed test - floatTypedArrayConstructorPrecision called with non-float TypedArray");
+  }
+}
diff --git a/js/src/tests/test262/built-ins/Array/prototype/sort/S15.4.4.11_A1.1_T1.js b/js/src/tests/test262/built-ins/Array/prototype/sort/S15.4.4.11_A1.1_T1.js
new file mode 100644
index 0000000000..af681151b3
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/sort/S15.4.4.11_A1.1_T1.js
@@ -0,0 +1,27 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    If this object does not have a property named by ToString(j),
+    and this object does not have a property named by ToString(k), return +0
+esid: sec-array.prototype.sort
+description: If comparefn is undefined, use SortCompare operator
+---*/
+
+var x = new Array(2);
+x.sort();
+
+if (x.length !== 2) {
+  throw new Test262Error('#1: var x = new Array(2); x.sort(); x.length === 2. Actual: ' + (x.length));
+}
+
+if (x[0] !== undefined) {
+  throw new Test262Error('#2: var x = new Array(2); x.sort(); x[0] === undefined. Actual: ' + (x[0]));
+}
+
+if (x[1] !== undefined) {
+  throw new Test262Error('#3: var x = new Array(2); x.sort(); x[1] === undefined. Actual: ' + (x[1]));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/sort/S15.4.4.11_A1.2_T1.js b/js/src/tests/test262/built-ins/Array/prototype/sort/S15.4.4.11_A1.2_T1.js
new file mode 100644
index 0000000000..95ccc2f4c9
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/sort/S15.4.4.11_A1.2_T1.js
@@ -0,0 +1,45 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    If this object does not have a property named by
+    ToString(j), return 1. If this object does not have a property
+    named by ToString(k), return -1
+esid: sec-array.prototype.sort
+description: If comparefn is undefined, use SortCompare operator
+---*/
+
+var x = new Array(2);
+x[1] = 1;
+x.sort();
+
+if (x.length !== 2) {
+  throw new Test262Error('#1: var x = new Array(2); x[1] = 1;  x.sort(); x.length === 2. Actual: ' + (x.length));
+}
+
+if (x[0] !== 1) {
+  throw new Test262Error('#2: var x = new Array(2); x[1] = 1;  x.sort(); x[0] === 1. Actual: ' + (x[0]));
+}
+
+if (x[1] !== undefined) {
+  throw new Test262Error('#3: var x = new Array(2); x[1] = 1;  x.sort(); x[1] === undefined. Actual: ' + (x[1]));
+}
+
+var x = new Array(2);
+x[0] = 1;
+x.sort();
+
+if (x.length !== 2) {
+  throw new Test262Error('#4: var x = new Array(2); x[0] = 1;  x.sort(); x.length === 2. Actual: ' + (x.length));
+}
+
+if (x[0] !== 1) {
+  throw new Test262Error('#5: var x = new Array(2); x[0] = 1;  x.sort(); x[0] === 1. Actual: ' + (x[0]));
+}
+
+if (x[1] !== undefined) {
+  throw new Test262Error('#6: var x = new Array(2); x[0] = 1;  x.sort(); x[1] === undefined. Actual: ' + (x[1]));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/sort/S15.4.4.11_A1.2_T2.js b/js/src/tests/test262/built-ins/Array/prototype/sort/S15.4.4.11_A1.2_T2.js
new file mode 100644
index 0000000000..5c10674217
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/sort/S15.4.4.11_A1.2_T2.js
@@ -0,0 +1,51 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    If this object does not have a property named by
+    ToString(j), return 1. If this object does not have a property
+    named by ToString(k), return -1
+esid: sec-array.prototype.sort
+description: If comparefn is not undefined
+---*/
+
+var myComparefn = function(x, y) {
+  if (x === undefined) return -1;
+  if (y === undefined) return 1;
+  return 0;
+}
+
+var x = new Array(2);
+x[1] = 1;
+x.sort(myComparefn);
+
+if (x.length !== 2) {
+  throw new Test262Error('#1: var x = new Array(2); x[1] = 1;  x.sort(myComparefn); x.length === 2. Actual: ' + (x.length));
+}
+
+if (x[0] !== 1) {
+  throw new Test262Error('#2: var x = new Array(2); x[1] = 1;  x.sort(myComparefn); x[0] === 1. Actual: ' + (x[0]));
+}
+
+if (x[1] !== undefined) {
+  throw new Test262Error('#3: var x = new Array(2); x[1] = 1;  x.sort(myComparefn); x[1] === undefined. Actual: ' + (x[1]));
+}
+
+var x = new Array(2);
+x[0] = 1;
+x.sort(myComparefn);
+
+if (x.length !== 2) {
+  throw new Test262Error('#4: var x = new Array(2); x[0] = 1;  x.sort(myComparefn); x.length === 2. Actual: ' + (x.length));
+}
+
+if (x[0] !== 1) {
+  throw new Test262Error('#5: var x = new Array(2); x[0] = 1;  x.sort(myComparefn); x[0] === 1. Actual: ' + (x[0]));
+}
+
+if (x[1] !== undefined) {
+  throw new Test262Error('#6: var x = new Array(2); x[0] = 1;  x.sort(myComparefn); x[1] === undefined. Actual: ' + (x[1]));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/sort/S15.4.4.11_A1.3_T1.js b/js/src/tests/test262/built-ins/Array/prototype/sort/S15.4.4.11_A1.3_T1.js
new file mode 100644
index 0000000000..6a6d330506
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/sort/S15.4.4.11_A1.3_T1.js
@@ -0,0 +1,27 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    If [[Get]] ToString(j) and [[Get]] ToString(k)
+    are both undefined, return +0
+esid: sec-array.prototype.sort
+description: If comparefn is undefined, use SortCompare operator
+---*/
+
+var x = new Array(undefined, undefined);
+x.sort();
+
+if (x.length !== 2) {
+  throw new Test262Error('#1: var x = new Array(undefined, undefined); x.sort(); x.length === 2. Actual: ' + (x.length));
+}
+
+if (x[0] !== undefined) {
+  throw new Test262Error('#2: var x = new Array(undefined, undefined); x.sort(); x[0] === undefined. Actual: ' + (x[0]));
+}
+
+if (x[1] !== undefined) {
+  throw new Test262Error('#3: var x = new Array(undefined, undefined); x.sort(); x[1] === undefined. Actual: ' + (x[1]));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/sort/S15.4.4.11_A1.4_T1.js b/js/src/tests/test262/built-ins/Array/prototype/sort/S15.4.4.11_A1.4_T1.js
new file mode 100644
index 0000000000..425c2361dd
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/sort/S15.4.4.11_A1.4_T1.js
@@ -0,0 +1,42 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    If [[Get]] ToString(j) is undefined, return 1.
+    If [[]Get] ToString(k) is undefined, return -1
+esid: sec-array.prototype.sort
+description: If comparefn is undefined, use SortCompare operator
+---*/
+
+var x = new Array(undefined, 1);
+x.sort();
+
+if (x.length !== 2) {
+  throw new Test262Error('#1: var x = new Array(undefined, 1); x.sort(); x.length === 2. Actual: ' + (x.length));
+}
+
+if (x[0] !== 1) {
+  throw new Test262Error('#2: var x = new Array(undefined, 1); x.sort(); x[0] === 1. Actual: ' + (x[0]));
+}
+
+if (x[1] !== undefined) {
+  throw new Test262Error('#3: var x = new Array(undefined, 1); x.sort(); x[1] === undefined. Actual: ' + (x[1]));
+}
+
+var x = new Array(1, undefined);
+x.sort();
+
+if (x.length !== 2) {
+  throw new Test262Error('#4: var x = new Array(1, undefined); x.sort(); x.length === 2. Actual: ' + (x.length));
+}
+
+if (x[0] !== 1) {
+  throw new Test262Error('#5: var x = new Array(1, undefined); x.sort(); x[0] === 1. Actual: ' + (x[0]));
+}
+
+if (x[1] !== undefined) {
+  throw new Test262Error('#6: var x = new Array(1, undefined); x.sort(); x[1] === undefined. Actual: ' + (x[1]));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/sort/S15.4.4.11_A1.4_T2.js b/js/src/tests/test262/built-ins/Array/prototype/sort/S15.4.4.11_A1.4_T2.js
new file mode 100644
index 0000000000..c0ab63090a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/sort/S15.4.4.11_A1.4_T2.js
@@ -0,0 +1,48 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    If [[Get]] ToString(j) is undefined, return 1.
+    If [[]Get] ToString(k) is undefined, return -1
+esid: sec-array.prototype.sort
+description: If comparefn is not undefined
+---*/
+
+var myComparefn = function(x, y) {
+  if (x === undefined) return -1;
+  if (y === undefined) return 1;
+  return 0;
+}
+
+var x = new Array(undefined, 1);
+x.sort(myComparefn);
+
+if (x.length !== 2) {
+  throw new Test262Error('#1: var x = new Array(undefined, 1); x.sort(myComparefn); x.length === 2. Actual: ' + (x.length));
+}
+
+if (x[0] !== 1) {
+  throw new Test262Error('#2: var x = new Array(undefined, 1); x.sort(myComparefn); x[0] === 1. Actual: ' + (x[0]));
+}
+
+if (x[1] !== undefined) {
+  throw new Test262Error('#3: var x = new Array(undefined, 1); x.sort(myComparefn); x[1] === undefined. Actual: ' + (x[1]));
+}
+
+var x = new Array(1, undefined);
+x.sort(myComparefn);
+
+if (x.length !== 2) {
+  throw new Test262Error('#4: var x = new Array(1, undefined); x.sort(myComparefn); x.length === 2. Actual: ' + (x.length));
+}
+
+if (x[0] !== 1) {
+  throw new Test262Error('#5: var x = new Array(1, undefined); x.sort(myComparefn); x[0] === 1. Actual: ' + (x[0]));
+}
+
+if (x[1] !== undefined) {
+  throw new Test262Error('#6: var x = new Array(1, undefined); x.sort(myComparefn); x[1] === undefined. Actual: ' + (x[1]));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/sort/S15.4.4.11_A1.5_T1.js b/js/src/tests/test262/built-ins/Array/prototype/sort/S15.4.4.11_A1.5_T1.js
new file mode 100644
index 0000000000..250933dd96
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/sort/S15.4.4.11_A1.5_T1.js
@@ -0,0 +1,40 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: If comparefn is undefined, use SortCompare operator
+esid: sec-array.prototype.sort
+description: Checking sort() and sort(undefined)
+---*/
+
+var x = new Array(1, 0);
+x.sort();
+
+if (x.length !== 2) {
+  throw new Test262Error('#1: var x = new Array(1,0);  x.sort(); x.length === 2. Actual: ' + (x.length));
+}
+
+if (x[0] !== 0) {
+  throw new Test262Error('#2: var x = new Array(1,0);  x.sort(); x[0] === 0. Actual: ' + (x[0]));
+}
+
+if (x[1] !== 1) {
+  throw new Test262Error('#3: var x = new Array(1,0);  x.sort(); x[1] === 1. Actual: ' + (x[1]));
+}
+
+var x = new Array(1, 0);
+x.sort(undefined);
+
+if (x.length !== 2) {
+  throw new Test262Error('#4: var x = new Array(1,0);  x.sort(undefined); x.length === 2. Actual: ' + (x.length));
+}
+
+if (x[0] !== 0) {
+  throw new Test262Error('#5: var x = new Array(1,0);  x.sort(undefined); x[0] === 0. Actual: ' + (x[0]));
+}
+
+if (x[1] !== 1) {
+  throw new Test262Error('#6: var x = new Array(1,0);  x.sort(undefined); x[1] === 1. Actual: ' + (x[1]));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/sort/S15.4.4.11_A2.1_T1.js b/js/src/tests/test262/built-ins/Array/prototype/sort/S15.4.4.11_A2.1_T1.js
new file mode 100644
index 0000000000..b4c988eec5
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/sort/S15.4.4.11_A2.1_T1.js
@@ -0,0 +1,26 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    If ToString([[Get]] ToString(j)) < ToString([[Get]] ToString(k)), return -1.
+    If ToString([[Get]] ToString(j)) > ToString([[Get]] ToString(k)), return 1;
+    return -1
+esid: sec-array.prototype.sort
+description: Checking ENGLISH ALPHABET
+---*/
+
+var alphabetR = ["z", "y", "x", "w", "v", "u", "t", "s", "r", "q", "p", "o", "n", "M", "L", "K", "J", "I", "H", "G", "F", "E", "D", "C", "B", "A"];
+var alphabet = ["A", "B", "C", "D", "E", "F", "G", "H", "I", "J", "K", "L", "M", "n", "o", "p", "q", "r", "s", "t", "u", "v", "w", "x", "y", "z"];
+
+alphabetR.sort();
+var result = true;
+for (var i = 0; i < 26; i++) {
+  if (alphabetR[i] !== alphabet[i]) result = false;
+}
+
+if (result !== true) {
+  throw new Test262Error('#1: CHECK ENGLISH ALPHABET');
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/sort/S15.4.4.11_A2.1_T2.js b/js/src/tests/test262/built-ins/Array/prototype/sort/S15.4.4.11_A2.1_T2.js
new file mode 100644
index 0000000000..e6e8ac1fc8
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/sort/S15.4.4.11_A2.1_T2.js
@@ -0,0 +1,26 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    If ToString([[Get]] ToString(j)) < ToString([[Get]] ToString(k)), return -1.
+    If ToString([[Get]] ToString(j)) > ToString([[Get]] ToString(k)), return 1;
+    return -1
+esid: sec-array.prototype.sort
+description: Checking RUSSIAN ALPHABET
+---*/
+
+var alphabetR = ["ё", "я", "ю", "э", "ь", "ы", "ъ", "щ", "ш", "ч", "ц", "х", "ф", "у", "т", "с", "р", "П", "О", "Н", "М", "Л", "К", "Й", "И", "З", "Ж", "Е", "Д", "Г", "В", "Б", "А"];
+var alphabet = ["А", "Б", "В", "Г", "Д", "Е", "Ж", "З", "И", "Й", "К", "Л", "М", "Н", "О", "П", "р", "с", "т", "у", "ф", "х", "ц", "ч", "ш", "щ", "ъ", "ы", "ь", "э", "ю", "я", "ё"];
+
+alphabetR.sort();
+var result = true;
+for (var i = 0; i < 26; i++) {
+  if (alphabetR[i] !== alphabet[i]) result = false;
+}
+
+if (result !== true) {
+  throw new Test262Error('#1: CHECK RUSSIAN ALPHABET');
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/sort/S15.4.4.11_A2.1_T3.js b/js/src/tests/test262/built-ins/Array/prototype/sort/S15.4.4.11_A2.1_T3.js
new file mode 100644
index 0000000000..d68d37b134
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/sort/S15.4.4.11_A2.1_T3.js
@@ -0,0 +1,36 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    If ToString([[Get]] ToString(j)) < ToString([[Get]] ToString(k)), return -1.
+    If ToString([[Get]] ToString(j)) > ToString([[Get]] ToString(k)), return 1;
+    return -1
+esid: sec-array.prototype.sort
+description: Checking ToString operator
+---*/
+
+var obj = {
+  valueOf: function() {
+    return 1
+  },
+  toString: function() {
+    return -2
+  }
+};
+var alphabetR = [undefined, 2, 1, "X", -1, "a", true, obj, NaN, Infinity];
+var alphabet = [-1, obj, 1, 2, Infinity, NaN, "X", "a", true, undefined];
+
+alphabetR.sort();
+var result = true;
+for (var i = 0; i < 10; i++) {
+  if (!(isNaN(alphabetR[i]) && isNaN(alphabet[i]))) {
+    if (alphabetR[i] !== alphabet[i]) result = false;
+  }
+}
+
+if (result !== true) {
+  throw new Test262Error('#1: Check ToString operator');
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/sort/S15.4.4.11_A2.2_T1.js b/js/src/tests/test262/built-ins/Array/prototype/sort/S15.4.4.11_A2.2_T1.js
new file mode 100644
index 0000000000..0473e9f881
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/sort/S15.4.4.11_A2.2_T1.js
@@ -0,0 +1,31 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: My comparefn is inverse implementation comparefn
+esid: sec-array.prototype.sort
+description: Checking ENGLISH ALPHABET
+---*/
+
+var alphabetR = ["z", "y", "x", "w", "v", "u", "t", "s", "r", "q", "p", "o", "n", "M", "L", "K", "J", "I", "H", "G", "F", "E", "D", "C", "B", "A"];
+var alphabet = ["A", "B", "C", "D", "E", "F", "G", "H", "I", "J", "K", "L", "M", "n", "o", "p", "q", "r", "s", "t", "u", "v", "w", "x", "y", "z"];
+
+var myComparefn = function(x, y) {
+  var xS = String(x);
+  var yS = String(y);
+  if (xS < yS) return 1
+  if (xS > yS) return -1;
+  return 0;
+}
+
+alphabet.sort(myComparefn);
+var result = true;
+for (var i = 0; i < 26; i++) {
+  if (alphabetR[i] !== alphabet[i]) result = false;
+}
+
+if (result !== true) {
+  throw new Test262Error('#1: CHECK ENGLISH ALPHABET');
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/sort/S15.4.4.11_A2.2_T2.js b/js/src/tests/test262/built-ins/Array/prototype/sort/S15.4.4.11_A2.2_T2.js
new file mode 100644
index 0000000000..4c719c957f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/sort/S15.4.4.11_A2.2_T2.js
@@ -0,0 +1,31 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: My comparefn is inverse implementation comparefn
+esid: sec-array.prototype.sort
+description: Checking RUSSIAN ALPHABET
+---*/
+
+var alphabetR = ["ё", "я", "ю", "э", "ь", "ы", "ъ", "щ", "ш", "ч", "ц", "х", "ф", "у", "т", "с", "р", "П", "О", "Н", "М", "Л", "К", "Й", "И", "З", "Ж", "Е", "Д", "Г", "В", "Б", "А"];
+var alphabet = ["А", "Б", "В", "Г", "Д", "Е", "Ж", "З", "И", "Й", "К", "Л", "М", "Н", "О", "П", "р", "с", "т", "у", "ф", "х", "ц", "ч", "ш", "щ", "ъ", "ы", "ь", "э", "ю", "я", "ё"];
+
+var myComparefn = function(x, y) {
+  var xS = String(x);
+  var yS = String(y);
+  if (xS < yS) return 1
+  if (xS > yS) return -1;
+  return 0;
+}
+
+alphabet.sort(myComparefn);
+var result = true;
+for (var i = 0; i < 26; i++) {
+  if (alphabetR[i] !== alphabet[i]) result = false;
+}
+
+if (result !== true) {
+  throw new Test262Error('#1: CHECK RUSSIAN ALPHABET');
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/sort/S15.4.4.11_A2.2_T3.js b/js/src/tests/test262/built-ins/Array/prototype/sort/S15.4.4.11_A2.2_T3.js
new file mode 100644
index 0000000000..3eef7ab2be
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/sort/S15.4.4.11_A2.2_T3.js
@@ -0,0 +1,41 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: My comparefn is inverse implementation comparefn
+esid: sec-array.prototype.sort
+description: Checking ToString operator
+---*/
+
+var obj = {
+  valueOf: function() {
+    return 1
+  },
+  toString: function() {
+    return -2
+  }
+};
+var alphabetR = [undefined, 2, 1, "X", -1, "a", true, obj, NaN, Infinity];
+var alphabet = [true, "a", "X", NaN, Infinity, 2, 1, obj, -1, undefined];
+
+var myComparefn = function(x, y) {
+  var xS = String(x);
+  var yS = String(y);
+  if (xS < yS) return 1
+  if (xS > yS) return -1;
+  return 0;
+}
+
+alphabetR.sort(myComparefn);
+var result = true;
+for (var i = 0; i < 10; i++) {
+  if (!(isNaN(alphabetR[i]) && isNaN(alphabet[i]))) {
+    if (alphabetR[i] !== alphabet[i]) result = false;
+  }
+}
+
+if (result !== true) {
+  throw new Test262Error('#1: Check ToString operator');
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/sort/S15.4.4.11_A3_T1.js b/js/src/tests/test262/built-ins/Array/prototype/sort/S15.4.4.11_A3_T1.js
new file mode 100644
index 0000000000..7add56c4b5
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/sort/S15.4.4.11_A3_T1.js
@@ -0,0 +1,54 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    The sort function is intentionally generic.
+    It does not require that its this value be an Array object
+esid: sec-array.prototype.sort
+description: If comparefn is undefined, use SortCompare operator
+---*/
+
+var obj = {
+  valueOf: function() {
+    return 1
+  },
+  toString: function() {
+    return -2
+  }
+};
+var alphabetR = {
+  0: undefined,
+  1: 2,
+  2: 1,
+  3: "X",
+  4: -1,
+  5: "a",
+  6: true,
+  7: obj,
+  8: NaN,
+  9: Infinity
+};
+alphabetR.sort = Array.prototype.sort;
+alphabetR.length = 10;
+var alphabet = [-1, obj, 1, 2, Infinity, NaN, "X", "a", true, undefined];
+
+alphabetR.sort();
+
+alphabetR.getClass = Object.prototype.toString;
+if (alphabetR.getClass() !== "[object " + "Object" + "]") {
+  throw new Test262Error('#0: alphabetR.sort() is Object object, not Array object');
+}
+
+var result = true;
+for (var i = 0; i < 10; i++) {
+  if (!(isNaN(alphabetR[i]) && isNaN(alphabet[i]))) {
+    if (alphabetR[i] !== alphabet[i]) result = false;
+  }
+}
+
+if (result !== true) {
+  throw new Test262Error('#1: Check ToString operator');
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/sort/S15.4.4.11_A3_T2.js b/js/src/tests/test262/built-ins/Array/prototype/sort/S15.4.4.11_A3_T2.js
new file mode 100644
index 0000000000..34b9e54b68
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/sort/S15.4.4.11_A3_T2.js
@@ -0,0 +1,62 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    The sort function is intentionally generic.
+    It does not require that its this value be an Array object
+esid: sec-array.prototype.sort
+description: If comparefn is not undefined
+---*/
+
+var obj = {
+  valueOf: function() {
+    return 1
+  },
+  toString: function() {
+    return -2
+  }
+};
+var alphabetR = {
+  0: undefined,
+  1: 2,
+  2: 1,
+  3: "X",
+  4: -1,
+  5: "a",
+  6: true,
+  7: obj,
+  8: NaN,
+  9: Infinity
+};
+alphabetR.sort = Array.prototype.sort;
+alphabetR.length = 10;
+var alphabet = [true, "a", "X", NaN, Infinity, 2, 1, obj, -1, undefined];
+
+var myComparefn = function(x, y) {
+  var xS = String(x);
+  var yS = String(y);
+  if (xS < yS) return 1
+  if (xS > yS) return -1;
+  return 0;
+}
+
+alphabetR.sort(myComparefn);
+
+alphabetR.getClass = Object.prototype.toString;
+if (alphabetR.getClass() !== "[object " + "Object" + "]") {
+  throw new Test262Error('#0: alphabetR.sort() is Object object, not Array object');
+}
+
+var result = true;
+for (var i = 0; i < 10; i++) {
+  if (!(isNaN(alphabetR[i]) && isNaN(alphabet[i]))) {
+    if (alphabetR[i] !== alphabet[i]) result = false;
+  }
+}
+
+if (result !== true) {
+  throw new Test262Error('#1: Check ToString operator');
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/sort/S15.4.4.11_A4_T3.js b/js/src/tests/test262/built-ins/Array/prototype/sort/S15.4.4.11_A4_T3.js
new file mode 100644
index 0000000000..75938b93c1
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/sort/S15.4.4.11_A4_T3.js
@@ -0,0 +1,37 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: Check ToLength(length) for non Array objects
+esid: sec-array.prototype.sort
+description: length = -4294967294
+---*/
+
+var obj = {};
+obj.sort = Array.prototype.sort;
+obj[0] = "z";
+obj[1] = "y";
+obj[2] = "x";
+obj.length = -4294967294;
+
+if (obj.sort() !== obj) {
+  throw new Test262Error('#1: var obj = {}; obj.sort = Array.prototype.sort; obj[0] = "z"; obj[1] = "y"; obj[2] = "x"; obj.length = -4294967294; obj.sort() === obj. Actual: ' + (obj.sort()));
+}
+
+if (obj.length !== -4294967294) {
+  throw new Test262Error('#2: var obj = {}; obj.sort = Array.prototype.sort; obj[0] = "z"; obj[1] = "y"; obj[2] = "x"; obj.length = -4294967294; obj.sort(); obj.length === -4294967294. Actual: ' + (obj.length));
+}
+
+if (obj[0] !== "z") {
+  throw new Test262Error('#3: var obj = {}; obj.sort = Array.prototype.sort; obj[0] = "z"; obj[1] = "y"; obj[2] = "x"; obj.length = -4294967294; obj.sort(); obj[0] === "z". Actual: ' + (obj[0]));
+}
+
+if (obj[1] !== "y") {
+  throw new Test262Error('#4: var obj = {}; obj.sort = Array.prototype.sort; obj[0] = "z"; obj[1] = "y"; obj[2] = "x"; obj.length = -4294967294; obj.sort(); obj[1] === "y". Actual: ' + (obj[1]));
+}
+
+if (obj[2] !== "x") {
+  throw new Test262Error('#5: var obj = {}; obj.sort = Array.prototype.sort; obj[0] = "z"; obj[1] = "y"; obj[2] = "x"; obj.length = -4294967294; obj.sort(); obj[2] === "x". Actual: ' + (obj[2]));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/sort/S15.4.4.11_A5_T1.js b/js/src/tests/test262/built-ins/Array/prototype/sort/S15.4.4.11_A5_T1.js
new file mode 100644
index 0000000000..18eaabaf40
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/sort/S15.4.4.11_A5_T1.js
@@ -0,0 +1,18 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: Array.sort should not eat exceptions
+esid: sec-array.prototype.sort
+description: comparefn function throw "error"
+---*/
+
+assert.throws(Test262Error, () => {
+  var myComparefn = function(x, y) {
+    throw new Test262Error();
+  }
+  var x = [1, 0];
+  x.sort(myComparefn);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/sort/S15.4.4.11_A6_T2.js b/js/src/tests/test262/built-ins/Array/prototype/sort/S15.4.4.11_A6_T2.js
new file mode 100644
index 0000000000..1b75ec229a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/sort/S15.4.4.11_A6_T2.js
@@ -0,0 +1,63 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: "[[Get]], [[Delete]] from not an inherited property"
+esid: sec-array.prototype.sort
+description: >
+    [[Prototype]] of Array instance is Array.prototype, [[Prototype]
+    of Array.prototype is Object.prototype
+---*/
+
+Array.prototype[1] = -1;
+var x = [1, 0];
+x.length = 2;
+x.sort();
+
+if (x[0] !== 0) {
+  throw new Test262Error('#1: Array.prototype[1] = -1; x = [1,0]; x.length = 2; x.sort(); x[0] === 0. Actual: ' + (x[0]));
+}
+
+if (x[1] !== 1) {
+  throw new Test262Error('#2: Array.prototype[1] = -1; x = [1,0]; x.length = 2; x.sort(); x[1] === 1. Actual: ' + (x[1]));
+}
+
+x.length = 0;
+
+if (x[0] !== undefined) {
+  throw new Test262Error('#3: Array.prototype[1] = -1; x = [1,0]; x.length = 2; x.sort(); x.length = 0; x[0] === undefined. Actual: ' + (x[0]));
+}
+
+if (x[1] !== -1) {
+  throw new Test262Error('#4: Array.prototype[1] = -1; x = [1,0]; x.length = 2; x.sort(); x.length = 0; x[1] === -1. Actual: ' + (x[1]));
+}
+
+Object.prototype[1] = -1;
+Object.prototype.length = 2;
+Object.prototype.sort = Array.prototype.sort;
+x = {
+  0: 1,
+  1: 0
+};
+x.sort();
+
+if (x[0] !== 0) {
+  throw new Test262Error('#5: Object.prototype[1] = -1; Object.prototype.length = 2; Object.prototype.sort = Array.prototype.sort; x = {0:1,1:0}; x.sort(); x[0] === 0. Actual: ' + (x[0]));
+}
+
+if (x[1] !== 1) {
+  throw new Test262Error('#6: Object.prototype[1] = -1; Object.prototype.length = 2; Object.prototype.sort = Array.prototype.sort; x = {0:1,1:0}; x.sort(); x[1] === 1. Actual: ' + (x[1]));
+}
+
+delete x[0];
+delete x[1];
+
+if (x[0] !== undefined) {
+  throw new Test262Error('#7: Object.prototype[1] = -1; Object.prototype.length = 2; Object.prototype.sort = Array.prototype.sort; x = {0:1,1:0}; x.sort(); delete x[0]; delete x[1]; x[0] === undefined. Actual: ' + (x[0]));
+}
+
+if (x[1] !== -1) {
+  throw new Test262Error('#8: Object.prototype[1] = -1; Object.prototype.length = 2; Object.prototype.sort = Array.prototype.sort; x = {0:1,1:0}; x.sort(); delete x[0]; delete x[1]; x[1] === -1. Actual: ' + (x[1]));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/sort/S15.4.4.11_A8.js b/js/src/tests/test262/built-ins/Array/prototype/sort/S15.4.4.11_A8.js
new file mode 100644
index 0000000000..7aa320b0ef
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/sort/S15.4.4.11_A8.js
@@ -0,0 +1,25 @@
+// Copyright 2011 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: Call the comparefn passing undefined as the this value (step 13b)
+esid: sec-array.prototype.sort
+description: comparefn tests that its this value is undefined
+flags: [noStrict]
+---*/
+
+var global = this;
+[2, 3].sort(function(x, y) {
+  "use strict";
+
+  if (this === global) {
+    throw new Test262Error('#1: Sort leaks global');
+  }
+  if (this !== undefined) {
+    throw new Test262Error('#2: Sort comparefn should be called with this===undefined. ' +
+      'Actual: ' + this);
+  }
+  return x - y;
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/sort/browser.js b/js/src/tests/test262/built-ins/Array/prototype/sort/browser.js
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/js/src/tests/test262/built-ins/Array/prototype/sort/bug_596_1.js b/js/src/tests/test262/built-ins/Array/prototype/sort/bug_596_1.js
new file mode 100644
index 0000000000..0298cbc442
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/sort/bug_596_1.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2014 Thomas Dahlstrom. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.sort
+description: >
+    The SortCompare abstract operation calls ToString() for  identical
+    elements (step 14/15)
+author: Thomas Dahlstrom (tdahlstrom@gmail.com)
+---*/
+
+var counter = 0;
+var object = {
+  toString: function() {
+    counter++;
+    return "";
+  }
+};
+
+[object, object].sort();
+if (counter < 2) {
+  // sort calls ToString() for each element at least once
+  throw new Test262Error('#1: [object, object].sort(); counter < 2. Actual: ' + (counter));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/sort/bug_596_2.js b/js/src/tests/test262/built-ins/Array/prototype/sort/bug_596_2.js
new file mode 100644
index 0000000000..7caa4a9f2e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/sort/bug_596_2.js
@@ -0,0 +1,57 @@
+// Copyright (c) 2014 Thomas Dahlstrom. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.sort
+description: >
+    Array.prototype.sort does not change non-existent elements to
+    undefined elements, that means holes are preserved (cf. spec  text
+    about [[Delete]] and sparse arrays)
+author: Thomas Dahlstrom (tdahlstrom@gmail.com)
+---*/
+
+var array = ['a', , void 0];
+
+//CHECK#1
+if (array.length !== 3) {
+  throw new Test262Error('#1: array.length !== 3. Actual: ' + (array.length))
+}
+
+//CHECK#2
+if (array.hasOwnProperty('0') !== true) {
+  throw new Test262Error("#2: array.hasOwnProperty('0'). Actual: " + array.hasOwnProperty('0'));
+}
+
+//CHECK#3
+if (array.hasOwnProperty('1') !== false) {
+  throw new Test262Error("#3: array.hasOwnProperty('1'). Actual: " + array.hasOwnProperty('1'));
+}
+
+//CHECK#4
+if (array.hasOwnProperty('2') !== true) {
+  throw new Test262Error("#4: array.hasOwnProperty('2'). Actual: " + array.hasOwnProperty('2'));
+}
+
+array.sort();
+
+//CHECK#5
+if (array.length !== 3) {
+  throw new Test262Error('#5: array.length !== 3. Actual: ' + (array.length))
+}
+
+//CHECK#6
+if (array.hasOwnProperty('0') !== true) {
+  throw new Test262Error("#6: array.hasOwnProperty('0'). Actual: " + array.hasOwnProperty('0'));
+}
+
+//CHECK#7
+if (array.hasOwnProperty('1') !== true) {
+  throw new Test262Error("#7: array.hasOwnProperty('1'). Actual: " + array.hasOwnProperty('1'));
+}
+
+//CHECK#8
+if (array.hasOwnProperty('2') !== false) {
+  throw new Test262Error("#8: array.hasOwnProperty('2'). Actual: " + array.hasOwnProperty('2'));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/sort/call-with-primitive.js b/js/src/tests/test262/built-ins/Array/prototype/sort/call-with-primitive.js
new file mode 100644
index 0000000000..f1d1554da8
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/sort/call-with-primitive.js
@@ -0,0 +1,32 @@
+// Copyright (C) 2021 Alexey Shvayka. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.sort
+description: >
+  This value is coerced to an object.
+info: |
+  Array.prototype.sort ( comparefn )
+
+  [...]
+  2. Let obj be ? ToObject(this value).
+  [...]
+  12. Return obj.
+features: [Symbol, BigInt]
+---*/
+
+assert.throws(TypeError, function() {
+  [].sort.call(undefined);
+}, "undefined");
+
+assert.throws(TypeError, function() {
+  [].sort.call(null);
+}, "null");
+
+assert([].sort.call(false) instanceof Boolean, "boolean");
+assert([].sort.call(0) instanceof Number, "number");
+assert([].sort.call("") instanceof String, "string");
+assert([].sort.call(Symbol()) instanceof Symbol, "symbol");
+assert([].sort.call(0n) instanceof BigInt, "bigint");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/sort/comparefn-nonfunction-call-throws.js b/js/src/tests/test262/built-ins/Array/prototype/sort/comparefn-nonfunction-call-throws.js
new file mode 100644
index 0000000000..bef7ff158b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/sort/comparefn-nonfunction-call-throws.js
@@ -0,0 +1,97 @@
+// Copyright (C) 2017 Jordan Harband. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.sort
+description: throws on a non-undefined non-function
+info: |
+  22.1.3.25 Array.prototype.sort ( comparefn )
+
+  Upon entry, the following steps are performed to initialize evaluation
+  of the sort function:
+
+  ...
+  1. If _comparefn_ is not *undefined* and IsCallable(_comparefn_) is *false*, throw a *TypeError* exception.
+  ...
+features: [Symbol]
+---*/
+
+var sample = [1];
+var poisoned = {
+  get length() {
+    throw new Test262Error("IsCallable(comparefn) should be observed before this.length");
+  }
+};
+
+assert.throws(TypeError, function() {
+  sample.sort(null);
+}, "sample.sort(null);");
+
+assert.throws(TypeError, function() {
+  [].sort.call(poisoned, null);
+}, "[].sort.call(poisoned, null);");
+
+assert.throws(TypeError, function() {
+  sample.sort(true);
+}, "sample.sort(true);");
+
+assert.throws(TypeError, function() {
+  [].sort.call(poisoned, true);
+}, "[].sort.call(poisoned, true);");
+
+assert.throws(TypeError, function() {
+  sample.sort(false);
+}, "sample.sort(false);");
+
+assert.throws(TypeError, function() {
+  [].sort.call(poisoned, false);
+}, "[].sort.call(poisoned, false);");
+
+assert.throws(TypeError, function() {
+  sample.sort('');
+}, "sample.sort('');");
+
+assert.throws(TypeError, function() {
+  [].sort.call(poisoned, '');
+}, "[].sort.call(poisoned, '');");
+
+assert.throws(TypeError, function() {
+  sample.sort(/a/g);
+}, "sample.sort(/a/g);");
+
+assert.throws(TypeError, function() {
+  [].sort.call(poisoned, /a/g);
+}, "[].sort.call(poisoned, /a/g);");
+
+assert.throws(TypeError, function() {
+  sample.sort(42);
+}, "sample.sort(42);");
+
+assert.throws(TypeError, function() {
+  [].sort.call(poisoned, 42);
+}, "[].sort.call(poisoned, 42);");
+
+assert.throws(TypeError, function() {
+  sample.sort([]);
+}, "sample.sort([]);");
+
+assert.throws(TypeError, function() {
+  [].sort.call(poisoned, []);
+}, "[].sort.call(poisoned, []);");
+
+assert.throws(TypeError, function() {
+  sample.sort({});
+}, "sample.sort({});");
+
+assert.throws(TypeError, function() {
+  [].sort.call(poisoned, {});
+}, "[].sort.call(poisoned, {});");
+
+assert.throws(TypeError, function() {
+  sample.sort(Symbol());
+}, "sample.sort(Symbol());");
+
+assert.throws(TypeError, function() {
+  [].sort.call(poisoned, Symbol());
+}, "[].sort.call(poisoned, Symbol());");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/sort/length.js b/js/src/tests/test262/built-ins/Array/prototype/sort/length.js
new file mode 100644
index 0000000000..67a6be2969
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/sort/length.js
@@ -0,0 +1,30 @@
+// Copyright (C) 2017 Leo Balter. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.sort
+description: >
+  The "length" property of Array.prototype.sort
+info: |
+  17 ECMAScript Standard Built-in Objects
+
+  Every built-in function object, including constructors, has a length property
+  whose value is an integer. Unless otherwise specified, this value is equal to
+  the largest number of named arguments shown in the subclause headings for the
+  function description. Optional parameters (which are indicated with brackets:
+  [ ]) or rest parameters (which are shown using the form «...name») are not
+  included in the default argument count.
+
+  Unless otherwise specified, the length property of a built-in function object
+  has the attributes { [[Writable]]: false, [[Enumerable]]: false,
+    [[Configurable]]: true }.
+includes: [propertyHelper.js]
+---*/
+
+assert.sameValue(Array.prototype.sort.length, 1);
+
+verifyNotEnumerable(Array.prototype.sort, 'length');
+verifyNotWritable(Array.prototype.sort, 'length');
+verifyConfigurable(Array.prototype.sort, 'length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/sort/name.js b/js/src/tests/test262/built-ins/Array/prototype/sort/name.js
new file mode 100644
index 0000000000..5ec58a1bb8
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/sort/name.js
@@ -0,0 +1,28 @@
+// Copyright (C) 2015 André Bargull. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.sort
+description: >
+  Array.prototype.sort.name is "sort".
+info: |
+  Array.prototype.sort (comparefn)
+
+  17 ECMAScript Standard Built-in Objects:
+    Every built-in Function object, including constructors, that is not
+    identified as an anonymous function has a name property whose value
+    is a String.
+
+    Unless otherwise specified, the name property of a built-in Function
+    object, if it exists, has the attributes { [[Writable]]: false,
+    [[Enumerable]]: false, [[Configurable]]: true }.
+includes: [propertyHelper.js]
+---*/
+
+assert.sameValue(Array.prototype.sort.name, "sort");
+
+verifyNotEnumerable(Array.prototype.sort, "name");
+verifyNotWritable(Array.prototype.sort, "name");
+verifyConfigurable(Array.prototype.sort, "name");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/sort/not-a-constructor.js b/js/src/tests/test262/built-ins/Array/prototype/sort/not-a-constructor.js
new file mode 100644
index 0000000000..e9dd5a40d3
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/sort/not-a-constructor.js
@@ -0,0 +1,31 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Array.prototype.sort does not implement [[Construct]], is not new-able
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+
+  sec-evaluatenew
+
+  ...
+  7. If IsConstructor(constructor) is false, throw a TypeError exception.
+  ...
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(isConstructor(Array.prototype.sort), false, 'isConstructor(Array.prototype.sort) must return false');
+
+assert.throws(TypeError, () => {
+  new Array.prototype.sort();
+}, '`new Array.prototype.sort()` throws TypeError');
+
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/sort/precise-comparefn-throws.js b/js/src/tests/test262/built-ins/Array/prototype/sort/precise-comparefn-throws.js
new file mode 100644
index 0000000000..3c5950982e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/sort/precise-comparefn-throws.js
@@ -0,0 +1,54 @@
+// Copyright (C) 2021 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.sort
+description: >
+  Previously implementation-defined aspects of Array.prototype.sort.
+info: |
+  Historically, many aspects of Array.prototype.sort remained
+  implementation-defined. https://github.com/tc39/ecma262/pull/1585
+  described some behaviors more precisely, reducing the amount of cases
+  that result in an implementation-defined sort order.
+---*/
+
+const logs = [];
+
+Object.defineProperty(Object.prototype, '2', {
+  get() {
+    logs.push('get');
+    return 4;
+  },
+  set(v) {
+    logs.push(`set with ${v}`);
+  }
+});
+const array = [undefined, 3, /*hole*/, 2, undefined, /*hole*/, 1];
+let count = 0;
+try {
+  array.sort((a, b) => {
+    if (++count === 3) {
+      throw new Error('lolwat');
+    }
+    return b - a;
+  });
+} catch (exception) {
+  logs.push(exception.message);
+}
+
+assert.sameValue(logs[0], 'get');
+assert.sameValue(logs[1], 'lolwat');
+assert.sameValue(logs.length, 2);
+
+assert.sameValue(array[0], undefined);
+assert.sameValue(array[1], 3);
+assert.sameValue('2' in array, true);
+assert.sameValue(array.hasOwnProperty('2'), false);
+assert.sameValue(array[3], 2);
+assert.sameValue(array[4], undefined);
+assert.sameValue('5' in array, false);
+assert.sameValue(array.hasOwnProperty('5'), false);
+assert.sameValue(array[6], 1);
+assert.sameValue(array.length, 7);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/sort/precise-getter-appends-elements.js b/js/src/tests/test262/built-ins/Array/prototype/sort/precise-getter-appends-elements.js
new file mode 100644
index 0000000000..d1f7ad7194
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/sort/precise-getter-appends-elements.js
@@ -0,0 +1,51 @@
+// Copyright (C) 2021 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.sort
+description: >
+  Previously implementation-defined aspects of Array.prototype.sort.
+info: |
+  Historically, many aspects of Array.prototype.sort remained
+  implementation-defined. https://github.com/tc39/ecma262/pull/1585
+  described some behaviors more precisely, reducing the amount of cases
+  that result in an implementation-defined sort order.
+---*/
+
+const array = [undefined, 'c', /*hole*/, 'b', undefined, /*hole*/, 'a', 'd'];
+
+Object.defineProperty(array, '2', {
+  get() {
+    array.push('foo');
+    array.push('bar');
+    return this.foo;
+  },
+  set(v) {
+    this.foo = v;
+  }
+});
+
+array.sort();
+
+assert.sameValue(array[0], 'a');
+assert.sameValue(array[1], 'b');
+assert.sameValue('2' in array, true);
+assert.sameValue(array.hasOwnProperty('2'), true);
+assert.sameValue(array[3], 'd');
+assert.sameValue(array[4], undefined);
+assert.sameValue(array[5], undefined);
+assert.sameValue(array[6], undefined);
+assert.sameValue('7' in array, false);
+assert.sameValue(array.hasOwnProperty('7'), false);
+assert.sameValue(array[8], 'foo');
+assert.sameValue(array[9], 'bar');
+assert.sameValue(array.length, 10);
+assert.sameValue(array.foo, 'c');
+
+assert.sameValue(array[2], 'c');
+assert.sameValue(array[10], 'foo');
+assert.sameValue(array[11], 'bar');
+assert.sameValue(array.length, 12);
+assert.sameValue(array.foo, 'c');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/sort/precise-getter-decreases-length.js b/js/src/tests/test262/built-ins/Array/prototype/sort/precise-getter-decreases-length.js
new file mode 100644
index 0000000000..c184ad10bf
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/sort/precise-getter-decreases-length.js
@@ -0,0 +1,41 @@
+// Copyright (C) 2021 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.sort
+description: >
+  Previously implementation-defined aspects of Array.prototype.sort.
+info: |
+  Historically, many aspects of Array.prototype.sort remained
+  implementation-defined. https://github.com/tc39/ecma262/pull/1585
+  described some behaviors more precisely, reducing the amount of cases
+  that result in an implementation-defined sort order.
+---*/
+
+const array = [undefined, 'c', /*hole*/, 'b', undefined, /*hole*/, 'a', 'd'];
+
+Object.defineProperty(array, '2', {
+  get() {
+    array.length = array.length - 2;
+    return this.foo;
+  },
+  set(v) {
+    this.foo = v;
+  }
+});
+
+array.sort();
+
+assert.sameValue(array[0], 'b');
+assert.sameValue(array[1], 'c');
+assert.sameValue(array[3], undefined);
+assert.sameValue(array[4], undefined);
+assert.sameValue('5' in array, false);
+assert.sameValue(array.hasOwnProperty('5'), false);
+assert.sameValue(array.length, 6);
+assert.sameValue(array.foo, undefined);
+
+assert.sameValue(array[2], undefined);
+assert.sameValue(array.length, 4);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/sort/precise-getter-deletes-predecessor.js b/js/src/tests/test262/built-ins/Array/prototype/sort/precise-getter-deletes-predecessor.js
new file mode 100644
index 0000000000..01348cf269
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/sort/precise-getter-deletes-predecessor.js
@@ -0,0 +1,45 @@
+// Copyright (C) 2021 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.sort
+description: >
+  Previously implementation-defined aspects of Array.prototype.sort.
+info: |
+  Historically, many aspects of Array.prototype.sort remained
+  implementation-defined. https://github.com/tc39/ecma262/pull/1585
+  described some behaviors more precisely, reducing the amount of cases
+  that result in an implementation-defined sort order.
+---*/
+
+const array = [undefined, 'c', /*hole*/, 'b', undefined, /*hole*/, 'a', 'd'];
+
+Object.defineProperty(array, '2', {
+  get() {
+    delete array[1];
+    return this.foo;
+  },
+  set(v) {
+    this.foo = v;
+  }
+});
+
+array.sort();
+
+assert.sameValue(array[0], 'a');
+assert.sameValue(array[1], 'b');
+assert.sameValue(array[3], 'd');
+assert.sameValue(array[4], undefined);
+assert.sameValue(array[5], undefined);
+assert.sameValue(array[6], undefined);
+assert.sameValue('7' in array, false);
+assert.sameValue(array.hasOwnProperty('7'), false);
+assert.sameValue(array.length, 8);
+assert.sameValue(array.foo, 'c');
+
+assert.sameValue(array[2], 'c');
+assert.sameValue('1' in array, false);
+assert.sameValue(array.hasOwnProperty(1), false);
+assert.sameValue(array.length, 8);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/sort/precise-getter-deletes-successor.js b/js/src/tests/test262/built-ins/Array/prototype/sort/precise-getter-deletes-successor.js
new file mode 100644
index 0000000000..4e52b7228c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/sort/precise-getter-deletes-successor.js
@@ -0,0 +1,46 @@
+// Copyright (C) 2021 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.sort
+description: >
+  Previously implementation-defined aspects of Array.prototype.sort.
+info: |
+  Historically, many aspects of Array.prototype.sort remained
+  implementation-defined. https://github.com/tc39/ecma262/pull/1585
+  described some behaviors more precisely, reducing the amount of cases
+  that result in an implementation-defined sort order.
+---*/
+
+const array = [undefined, 'c', /*hole*/, 'b', undefined, /*hole*/, 'a', 'd'];
+
+Object.defineProperty(array, '2', {
+  get() {
+    delete array[3];
+    return this.foo;
+  },
+  set(v) {
+    this.foo = v;
+  }
+});
+
+array.sort();
+
+assert.sameValue(array[0], 'a');
+assert.sameValue(array[1], 'c');
+assert.sameValue(array[3], undefined);
+assert.sameValue(array[4], undefined);
+assert.sameValue(array[5], undefined);
+assert.sameValue('6' in array, false);
+assert.sameValue(array.hasOwnProperty('6'), false);
+assert.sameValue('7' in array, false);
+assert.sameValue(array.hasOwnProperty('7'), false);
+assert.sameValue(array.length, 8);
+assert.sameValue(array.foo, 'd');
+
+assert.sameValue(array[2], 'd');
+assert.sameValue('3' in array, false);
+assert.sameValue(array.hasOwnProperty(3), false);
+assert.sameValue(array.length, 8);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/sort/precise-getter-increases-length.js b/js/src/tests/test262/built-ins/Array/prototype/sort/precise-getter-increases-length.js
new file mode 100644
index 0000000000..e7d9fbf855
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/sort/precise-getter-increases-length.js
@@ -0,0 +1,51 @@
+// Copyright (C) 2021 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.sort
+description: >
+  Previously implementation-defined aspects of Array.prototype.sort.
+info: |
+  Historically, many aspects of Array.prototype.sort remained
+  implementation-defined. https://github.com/tc39/ecma262/pull/1585
+  described some behaviors more precisely, reducing the amount of cases
+  that result in an implementation-defined sort order.
+---*/
+
+const array = [undefined, 'c', /*hole*/, 'b', undefined, /*hole*/, 'a', 'd'];
+
+Object.defineProperty(array, '2', {
+  get() {
+    array.length = array.length + 2;
+    return this.foo;
+  },
+  set(v) {
+    this.foo = v;
+  }
+});
+
+array.sort();
+
+assert.sameValue(array[0], 'a');
+assert.sameValue(array[1], 'b');
+assert.sameValue(array[3], 'd');
+assert.sameValue(array[4], undefined);
+assert.sameValue(array[5], undefined);
+assert.sameValue(array[6], undefined);
+assert.sameValue('7' in array, false);
+assert.sameValue(array.hasOwnProperty('7'), false);
+assert.sameValue('8' in array, false);
+assert.sameValue(array.hasOwnProperty('8'), false);
+assert.sameValue('9' in array, false);
+assert.sameValue(array.hasOwnProperty('9'), false);
+assert.sameValue(array.length, 10);
+assert.sameValue(array.foo, 'c');
+
+assert.sameValue(array[2], 'c');
+assert.sameValue('10' in array, false);
+assert.sameValue(array.hasOwnProperty('10'), false);
+assert.sameValue('11' in array, false);
+assert.sameValue(array.hasOwnProperty('11'), false);
+assert.sameValue(array.length, 12);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/sort/precise-getter-pops-elements.js b/js/src/tests/test262/built-ins/Array/prototype/sort/precise-getter-pops-elements.js
new file mode 100644
index 0000000000..8fb67f84e3
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/sort/precise-getter-pops-elements.js
@@ -0,0 +1,42 @@
+// Copyright (C) 2021 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.sort
+description: >
+  Previously implementation-defined aspects of Array.prototype.sort.
+info: |
+  Historically, many aspects of Array.prototype.sort remained
+  implementation-defined. https://github.com/tc39/ecma262/pull/1585
+  described some behaviors more precisely, reducing the amount of cases
+  that result in an implementation-defined sort order.
+---*/
+
+const array = [undefined, 'c', /*hole*/, 'b', undefined, /*hole*/, 'a', 'd'];
+
+Object.defineProperty(array, '2', {
+  get() {
+    array.pop();
+    array.pop();
+    return this.foo;
+  },
+  set(v) {
+    this.foo = v;
+  }
+});
+
+array.sort();
+
+assert.sameValue(array[0], 'b');
+assert.sameValue(array[1], 'c');
+assert.sameValue(array[3], undefined);
+assert.sameValue(array[4], undefined);
+assert.sameValue('5' in array, false);
+assert.sameValue(array.hasOwnProperty('5'), false);
+assert.sameValue(array.length, 6);
+assert.sameValue(array.foo, undefined);
+
+assert.sameValue(array[2], undefined);
+assert.sameValue(array.length, 4);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/sort/precise-getter-sets-predecessor.js b/js/src/tests/test262/built-ins/Array/prototype/sort/precise-getter-sets-predecessor.js
new file mode 100644
index 0000000000..ed440f22ec
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/sort/precise-getter-sets-predecessor.js
@@ -0,0 +1,43 @@
+// Copyright (C) 2021 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.sort
+description: >
+  Previously implementation-defined aspects of Array.prototype.sort.
+info: |
+  Historically, many aspects of Array.prototype.sort remained
+  implementation-defined. https://github.com/tc39/ecma262/pull/1585
+  described some behaviors more precisely, reducing the amount of cases
+  that result in an implementation-defined sort order.
+---*/
+
+const array = [undefined, 'c', /*hole*/, 'b', undefined, /*hole*/, 'a', 'd'];
+
+Object.defineProperty(array, '2', {
+  get() {
+    array[1] = 'foobar';
+    return this.foo;
+  },
+  set(v) {
+    this.foo = v;
+  }
+});
+
+array.sort();
+
+assert.sameValue(array[0], 'a');
+assert.sameValue(array[1], 'b');
+assert.sameValue(array[3], 'd');
+assert.sameValue(array[4], undefined);
+assert.sameValue(array[5], undefined);
+assert.sameValue(array[6], undefined);
+assert.sameValue('7' in array, false);
+assert.sameValue(array.hasOwnProperty('7'), false);
+assert.sameValue(array.length, 8);
+assert.sameValue(array.foo, 'c');
+
+assert.sameValue(array[2], 'c');
+assert.sameValue(array[1], 'foobar');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/sort/precise-getter-sets-successor.js b/js/src/tests/test262/built-ins/Array/prototype/sort/precise-getter-sets-successor.js
new file mode 100644
index 0000000000..e6534ab021
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/sort/precise-getter-sets-successor.js
@@ -0,0 +1,43 @@
+// Copyright (C) 2021 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.sort
+description: >
+  Previously implementation-defined aspects of Array.prototype.sort.
+info: |
+  Historically, many aspects of Array.prototype.sort remained
+  implementation-defined. https://github.com/tc39/ecma262/pull/1585
+  described some behaviors more precisely, reducing the amount of cases
+  that result in an implementation-defined sort order.
+---*/
+
+const array = [undefined, 'c', /*hole*/, 'b', undefined, /*hole*/, 'a', 'd'];
+
+Object.defineProperty(array, '2', {
+  get() {
+    array[3] = 'foobar';
+    return this.foo;
+  },
+  set(v) {
+    this.foo = v;
+  }
+});
+
+array.sort();
+
+assert.sameValue(array[0], 'a');
+assert.sameValue(array[1], 'c');
+assert.sameValue(array[3], 'foobar');
+assert.sameValue(array[4], undefined);
+assert.sameValue(array[5], undefined);
+assert.sameValue(array[6], undefined);
+assert.sameValue('7' in array, false);
+assert.sameValue(array.hasOwnProperty('7'), false);
+assert.sameValue(array.length, 8);
+assert.sameValue(array.foo, 'd');
+
+assert.sameValue(array[2], 'd');
+assert.sameValue(array[3], 'foobar');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/sort/precise-prototype-accessors.js b/js/src/tests/test262/built-ins/Array/prototype/sort/precise-prototype-accessors.js
new file mode 100644
index 0000000000..ccad0bbf50
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/sort/precise-prototype-accessors.js
@@ -0,0 +1,44 @@
+// Copyright (C) 2021 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.sort
+description: >
+  Previously implementation-defined aspects of Array.prototype.sort.
+info: |
+  Historically, many aspects of Array.prototype.sort remained
+  implementation-defined. https://github.com/tc39/ecma262/pull/1585
+  described some behaviors more precisely, reducing the amount of cases
+  that result in an implementation-defined sort order.
+---*/
+
+const logs = [];
+
+Object.defineProperty(Object.prototype, '2', {
+  get() {
+    logs.push('get');
+    return 4;
+  },
+  set(v) {
+    logs.push(`set with ${v}`);
+  }
+});
+const array = [undefined, 3, /*hole*/, 2, undefined, /*hole*/, 1];
+array.sort();
+
+assert.sameValue(logs[0], 'get');
+assert.sameValue(logs[1], 'set with 3');
+assert.sameValue(logs.length, 2);
+
+assert.sameValue(array[0], 1);
+assert.sameValue(array[1], 2);
+assert.sameValue('2' in array, true);
+assert.sameValue(array.hasOwnProperty('2'), false);
+assert.sameValue(array[3], 4);
+assert.sameValue(array[4], undefined);
+assert.sameValue(array[5], undefined);
+assert.sameValue('6' in array, false);
+assert.sameValue(array.hasOwnProperty('6'), false);
+assert.sameValue(array.length, 7);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/sort/precise-prototype-element.js b/js/src/tests/test262/built-ins/Array/prototype/sort/precise-prototype-element.js
new file mode 100644
index 0000000000..18051f01a6
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/sort/precise-prototype-element.js
@@ -0,0 +1,29 @@
+// Copyright (C) 2021 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.sort
+description: >
+  Previously implementation-defined aspects of Array.prototype.sort.
+info: |
+  Historically, many aspects of Array.prototype.sort remained
+  implementation-defined. https://github.com/tc39/ecma262/pull/1585
+  described some behaviors more precisely, reducing the amount of cases
+  that result in an implementation-defined sort order.
+---*/
+
+Object.prototype[2] = 4;
+const array = [undefined, 3, /*hole*/, 2, undefined, /*hole*/, 1];
+array.sort();
+
+assert.sameValue(array[0], 1);
+assert.sameValue(array[1], 2);
+assert.sameValue(array[2], 3);
+assert.sameValue(array[3], 4);
+assert.sameValue(array[4], undefined);
+assert.sameValue(array[5], undefined);
+assert.sameValue('6' in array, false);
+assert.sameValue(array.hasOwnProperty('6'), false);
+assert.sameValue(array.length, 7);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/sort/precise-setter-appends-elements.js b/js/src/tests/test262/built-ins/Array/prototype/sort/precise-setter-appends-elements.js
new file mode 100644
index 0000000000..b5d7d8bdfb
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/sort/precise-setter-appends-elements.js
@@ -0,0 +1,44 @@
+// Copyright (C) 2021 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.sort
+description: >
+  Previously implementation-defined aspects of Array.prototype.sort.
+info: |
+  Historically, many aspects of Array.prototype.sort remained
+  implementation-defined. https://github.com/tc39/ecma262/pull/1585
+  described some behaviors more precisely, reducing the amount of cases
+  that result in an implementation-defined sort order.
+---*/
+
+const array = [undefined, 'c', /*hole*/, 'b', undefined, /*hole*/, 'a', 'd'];
+
+Object.defineProperty(array, '2', {
+  get() {
+    return this.foo;
+  },
+  set(v) {
+    array.push('foo');
+    array.push('bar');
+    this.foo = v;
+  }
+});
+
+array.sort();
+
+assert.sameValue(array[0], 'a');
+assert.sameValue(array[1], 'b');
+assert.sameValue(array[2], 'c');
+assert.sameValue(array[3], 'd');
+assert.sameValue(array[4], undefined);
+assert.sameValue(array[5], undefined);
+assert.sameValue(array[6], undefined);
+assert.sameValue('7' in array, false);
+assert.sameValue(array.hasOwnProperty('7'), false);
+assert.sameValue(array[8], 'foo');
+assert.sameValue(array[9], 'bar');
+assert.sameValue(array.length, 10);
+assert.sameValue(array.foo, 'c');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/sort/precise-setter-decreases-length.js b/js/src/tests/test262/built-ins/Array/prototype/sort/precise-setter-decreases-length.js
new file mode 100644
index 0000000000..7d3fff0ebf
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/sort/precise-setter-decreases-length.js
@@ -0,0 +1,39 @@
+// Copyright (C) 2021 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.sort
+description: >
+  Previously implementation-defined aspects of Array.prototype.sort.
+info: |
+  Historically, many aspects of Array.prototype.sort remained
+  implementation-defined. https://github.com/tc39/ecma262/pull/1585
+  described some behaviors more precisely, reducing the amount of cases
+  that result in an implementation-defined sort order.
+---*/
+
+const array = [undefined, 'c', /*hole*/, 'b', undefined, /*hole*/, 'a', 'd'];
+
+Object.defineProperty(array, '2', {
+  get() {
+    return this.foo;
+  },
+  set(v) {
+    array.length = array.length - 2;
+    this.foo = v;
+  }
+});
+
+array.sort();
+
+assert.sameValue(array[0], 'a');
+assert.sameValue(array[1], 'b');
+assert.sameValue(array[2], 'c');
+assert.sameValue(array[3], 'd');
+assert.sameValue(array[4], undefined);
+assert.sameValue(array[5], undefined);
+assert.sameValue(array[6], undefined);
+assert.sameValue(array.length, 7);
+assert.sameValue(array.foo, 'c');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/sort/precise-setter-deletes-predecessor.js b/js/src/tests/test262/built-ins/Array/prototype/sort/precise-setter-deletes-predecessor.js
new file mode 100644
index 0000000000..483917d83b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/sort/precise-setter-deletes-predecessor.js
@@ -0,0 +1,42 @@
+// Copyright (C) 2021 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.sort
+description: >
+  Previously implementation-defined aspects of Array.prototype.sort.
+info: |
+  Historically, many aspects of Array.prototype.sort remained
+  implementation-defined. https://github.com/tc39/ecma262/pull/1585
+  described some behaviors more precisely, reducing the amount of cases
+  that result in an implementation-defined sort order.
+---*/
+
+const array = [undefined, 'c', /*hole*/, 'b', undefined, /*hole*/, 'a', 'd'];
+
+Object.defineProperty(array, '2', {
+  get() {
+    return this.foo;
+  },
+  set(v) {
+    delete array[1];
+    this.foo = v;
+  }
+});
+
+array.sort();
+
+assert.sameValue(array[0], 'a');
+assert.sameValue('1' in array, false);
+assert.sameValue(array.hasOwnProperty(1), false);
+assert.sameValue(array[2], 'c');
+assert.sameValue(array[3], 'd');
+assert.sameValue(array[4], undefined);
+assert.sameValue(array[5], undefined);
+assert.sameValue(array[6], undefined);
+assert.sameValue('7' in array, false);
+assert.sameValue(array.hasOwnProperty('7'), false);
+assert.sameValue(array.length, 8);
+assert.sameValue(array.foo, 'c');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/sort/precise-setter-deletes-successor.js b/js/src/tests/test262/built-ins/Array/prototype/sort/precise-setter-deletes-successor.js
new file mode 100644
index 0000000000..f78b134f14
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/sort/precise-setter-deletes-successor.js
@@ -0,0 +1,41 @@
+// Copyright (C) 2021 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.sort
+description: >
+  Previously implementation-defined aspects of Array.prototype.sort.
+info: |
+  Historically, many aspects of Array.prototype.sort remained
+  implementation-defined. https://github.com/tc39/ecma262/pull/1585
+  described some behaviors more precisely, reducing the amount of cases
+  that result in an implementation-defined sort order.
+---*/
+
+const array = [undefined, 'c', /*hole*/, 'b', undefined, /*hole*/, 'a', 'd'];
+
+Object.defineProperty(array, '2', {
+  get() {
+    return this.foo;
+  },
+  set(v) {
+    delete array[3];
+    this.foo = v;
+  }
+});
+
+array.sort();
+
+assert.sameValue(array[0], 'a');
+assert.sameValue(array[1], 'b');
+assert.sameValue(array[2], 'c');
+assert.sameValue(array[3], 'd');
+assert.sameValue(array[4], undefined);
+assert.sameValue(array[5], undefined);
+assert.sameValue(array[6], undefined);
+assert.sameValue('7' in array, false);
+assert.sameValue(array.hasOwnProperty('7'), false);
+assert.sameValue(array.length, 8);
+assert.sameValue(array.foo, 'c');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/sort/precise-setter-increases-length.js b/js/src/tests/test262/built-ins/Array/prototype/sort/precise-setter-increases-length.js
new file mode 100644
index 0000000000..bb95633fea
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/sort/precise-setter-increases-length.js
@@ -0,0 +1,45 @@
+// Copyright (C) 2021 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.sort
+description: >
+  Previously implementation-defined aspects of Array.prototype.sort.
+info: |
+  Historically, many aspects of Array.prototype.sort remained
+  implementation-defined. https://github.com/tc39/ecma262/pull/1585
+  described some behaviors more precisely, reducing the amount of cases
+  that result in an implementation-defined sort order.
+---*/
+
+const array = [undefined, 'c', /*hole*/, 'b', undefined, /*hole*/, 'a', 'd'];
+
+Object.defineProperty(array, '2', {
+  get() {
+    return this.foo;
+  },
+  set(v) {
+    array.length = array.length + 2;
+    this.foo = v;
+  }
+});
+
+array.sort();
+
+assert.sameValue(array[0], 'a');
+assert.sameValue(array[1], 'b');
+assert.sameValue(array[2], 'c');
+assert.sameValue(array[3], 'd');
+assert.sameValue(array[4], undefined);
+assert.sameValue(array[5], undefined);
+assert.sameValue(array[6], undefined);
+assert.sameValue('7' in array, false);
+assert.sameValue(array.hasOwnProperty('7'), false);
+assert.sameValue('8' in array, false);
+assert.sameValue(array.hasOwnProperty('8'), false);
+assert.sameValue('9' in array, false);
+assert.sameValue(array.hasOwnProperty('9'), false);
+assert.sameValue(array.length, 10);
+assert.sameValue(array.foo, 'c');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/sort/precise-setter-pops-elements.js b/js/src/tests/test262/built-ins/Array/prototype/sort/precise-setter-pops-elements.js
new file mode 100644
index 0000000000..27b5731308
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/sort/precise-setter-pops-elements.js
@@ -0,0 +1,40 @@
+// Copyright (C) 2021 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.sort
+description: >
+  Previously implementation-defined aspects of Array.prototype.sort.
+info: |
+  Historically, many aspects of Array.prototype.sort remained
+  implementation-defined. https://github.com/tc39/ecma262/pull/1585
+  described some behaviors more precisely, reducing the amount of cases
+  that result in an implementation-defined sort order.
+---*/
+
+const array = [undefined, 'c', /*hole*/, 'b', undefined, /*hole*/, 'a', 'd'];
+
+Object.defineProperty(array, '2', {
+  get() {
+    return this.foo;
+  },
+  set(v) {
+    array.pop();
+    array.pop();
+    this.foo = v;
+  }
+});
+
+array.sort();
+
+assert.sameValue(array[0], 'a');
+assert.sameValue(array[1], 'b');
+assert.sameValue(array[2], 'c');
+assert.sameValue(array[3], 'd');
+assert.sameValue(array[4], undefined);
+assert.sameValue(array[5], undefined);
+assert.sameValue(array[6], undefined);
+assert.sameValue(array.length, 7);
+assert.sameValue(array.foo, 'c');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/sort/precise-setter-sets-predecessor.js b/js/src/tests/test262/built-ins/Array/prototype/sort/precise-setter-sets-predecessor.js
new file mode 100644
index 0000000000..95c7987196
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/sort/precise-setter-sets-predecessor.js
@@ -0,0 +1,41 @@
+// Copyright (C) 2021 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.sort
+description: >
+  Previously implementation-defined aspects of Array.prototype.sort.
+info: |
+  Historically, many aspects of Array.prototype.sort remained
+  implementation-defined. https://github.com/tc39/ecma262/pull/1585
+  described some behaviors more precisely, reducing the amount of cases
+  that result in an implementation-defined sort order.
+---*/
+
+const array = [undefined, 'c', /*hole*/, 'b', undefined, /*hole*/, 'a', 'd'];
+
+Object.defineProperty(array, '2', {
+  get() {
+    return this.foo;
+  },
+  set(v) {
+    array[1] = 'foobar';
+    this.foo = v;
+  }
+});
+
+array.sort();
+
+assert.sameValue(array[0], 'a');
+assert.sameValue(array[1], 'foobar');
+assert.sameValue(array[2], 'c');
+assert.sameValue(array[3], 'd');
+assert.sameValue(array[4], undefined);
+assert.sameValue(array[5], undefined);
+assert.sameValue(array[6], undefined);
+assert.sameValue('7' in array, false);
+assert.sameValue(array.hasOwnProperty('7'), false);
+assert.sameValue(array.length, 8);
+assert.sameValue(array.foo, 'c');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/sort/precise-setter-sets-successor.js b/js/src/tests/test262/built-ins/Array/prototype/sort/precise-setter-sets-successor.js
new file mode 100644
index 0000000000..adae4922bc
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/sort/precise-setter-sets-successor.js
@@ -0,0 +1,41 @@
+// Copyright (C) 2021 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.sort
+description: >
+  Previously implementation-defined aspects of Array.prototype.sort.
+info: |
+  Historically, many aspects of Array.prototype.sort remained
+  implementation-defined. https://github.com/tc39/ecma262/pull/1585
+  described some behaviors more precisely, reducing the amount of cases
+  that result in an implementation-defined sort order.
+---*/
+
+const array = [undefined, 'c', /*hole*/, 'b', undefined, /*hole*/, 'a', 'd'];
+
+Object.defineProperty(array, '2', {
+  get() {
+    return this.foo;
+  },
+  set(v) {
+    array[3] = 'foobar';
+    this.foo = v;
+  }
+});
+
+array.sort();
+
+assert.sameValue(array[0], 'a');
+assert.sameValue(array[1], 'b');
+assert.sameValue(array[2], 'c');
+assert.sameValue(array[3], 'd');
+assert.sameValue(array[4], undefined);
+assert.sameValue(array[5], undefined);
+assert.sameValue(array[6], undefined);
+assert.sameValue('7' in array, false);
+assert.sameValue(array.hasOwnProperty('7'), false);
+assert.sameValue(array.length, 8);
+assert.sameValue(array.foo, 'c');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/sort/prop-desc.js b/js/src/tests/test262/built-ins/Array/prototype/sort/prop-desc.js
new file mode 100644
index 0000000000..a1844b2aea
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/sort/prop-desc.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2017 Leo Balter. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.sort
+description: >
+  "sort" property of Array.prototype
+info: |
+  17 ECMAScript Standard Built-in Objects
+  
+  Every other data property described in clauses 18 through 26 and in Annex B.2
+  has the attributes { [[Writable]]: true, [[Enumerable]]: false,
+    [[Configurable]]: true } unless otherwise specified.
+includes: [propertyHelper.js]
+---*/
+
+assert.sameValue(typeof Array.prototype.sort, 'function', 'typeof');
+
+verifyNotEnumerable(Array.prototype, "sort");
+verifyWritable(Array.prototype, "sort");
+verifyConfigurable(Array.prototype, "sort");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/sort/shell.js b/js/src/tests/test262/built-ins/Array/prototype/sort/shell.js
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/js/src/tests/test262/built-ins/Array/prototype/sort/stability-11-elements.js b/js/src/tests/test262/built-ins/Array/prototype/sort/stability-11-elements.js
new file mode 100644
index 0000000000..2505b5228a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/sort/stability-11-elements.js
@@ -0,0 +1,38 @@
+// Copyright (C) 2018 Mathias Bynens. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.sort
+description: >
+  Stability of Array.prototype.sort for an array with 11 elements.
+info: |
+  The sort is required to be stable (that is, elements that compare equal
+  remain in their original order).
+  The array length of 11 was chosen because V8 used an unstable
+  QuickSort for arrays with more than 10 elements until v7.0 (September
+  2018). https://v8.dev/blog/array-sort
+---*/
+
+const array = [
+  { name: 'A', rating: 2 },
+  { name: 'B', rating: 3 },
+  { name: 'C', rating: 2 },
+  { name: 'D', rating: 4 },
+  { name: 'E', rating: 3 },
+  { name: 'F', rating: 3 },
+  { name: 'G', rating: 4 },
+  { name: 'H', rating: 3 },
+  { name: 'I', rating: 2 },
+  { name: 'J', rating: 2 },
+  { name: 'K', rating: 2 },
+];
+assert.sameValue(array.length, 11);
+
+// Sort the elements by `rating` in descending order.
+// (This updates `array` in place.)
+array.sort((a, b) => b.rating - a.rating);
+
+const reduced = array.reduce((acc, element) => acc + element.name, '');
+assert.sameValue(reduced, 'DGBEFHACIJK');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/sort/stability-2048-elements.js b/js/src/tests/test262/built-ins/Array/prototype/sort/stability-2048-elements.js
new file mode 100644
index 0000000000..e791036a26
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/sort/stability-2048-elements.js
@@ -0,0 +1,2083 @@
+// Copyright (C) 2018 Mathias Bynens. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.sort
+description: >
+  Stability of Array.prototype.sort for an array with 2048 elements.
+info: |
+  The sort is required to be stable (that is, elements that compare equal
+  remain in their original order).
+  The array length of 2048 was chosen because as of late 2018, Chakra
+  uses merge sort for arrays with 2048 or more elements. It uses
+  insertion sort for smaller arrays.
+  https://github.com/Microsoft/ChakraCore/pull/5724/files#diff-85203ec16f5961eb4c18e4253bb42140R337
+---*/
+
+const array = [
+  { name: 'A000', rating: 2 },
+  { name: 'A001', rating: 2 },
+  { name: 'A002', rating: 2 },
+  { name: 'A003', rating: 2 },
+  { name: 'A004', rating: 2 },
+  { name: 'A005', rating: 2 },
+  { name: 'A006', rating: 2 },
+  { name: 'A007', rating: 2 },
+  { name: 'A008', rating: 2 },
+  { name: 'A009', rating: 2 },
+  { name: 'A010', rating: 2 },
+  { name: 'A011', rating: 2 },
+  { name: 'A012', rating: 2 },
+  { name: 'A013', rating: 2 },
+  { name: 'A014', rating: 2 },
+  { name: 'A015', rating: 2 },
+  { name: 'A016', rating: 2 },
+  { name: 'A017', rating: 2 },
+  { name: 'A018', rating: 2 },
+  { name: 'A019', rating: 2 },
+  { name: 'A020', rating: 2 },
+  { name: 'A021', rating: 2 },
+  { name: 'A022', rating: 2 },
+  { name: 'A023', rating: 2 },
+  { name: 'A024', rating: 2 },
+  { name: 'A025', rating: 2 },
+  { name: 'A026', rating: 2 },
+  { name: 'A027', rating: 2 },
+  { name: 'A028', rating: 2 },
+  { name: 'A029', rating: 2 },
+  { name: 'A030', rating: 2 },
+  { name: 'A031', rating: 2 },
+  { name: 'A032', rating: 2 },
+  { name: 'A033', rating: 2 },
+  { name: 'A034', rating: 2 },
+  { name: 'A035', rating: 2 },
+  { name: 'A036', rating: 2 },
+  { name: 'A037', rating: 2 },
+  { name: 'A038', rating: 2 },
+  { name: 'A039', rating: 2 },
+  { name: 'A040', rating: 2 },
+  { name: 'A041', rating: 2 },
+  { name: 'A042', rating: 2 },
+  { name: 'A043', rating: 2 },
+  { name: 'A044', rating: 2 },
+  { name: 'A045', rating: 2 },
+  { name: 'A046', rating: 2 },
+  { name: 'A047', rating: 2 },
+  { name: 'A048', rating: 2 },
+  { name: 'A049', rating: 2 },
+  { name: 'A050', rating: 2 },
+  { name: 'A051', rating: 2 },
+  { name: 'A052', rating: 2 },
+  { name: 'A053', rating: 2 },
+  { name: 'A054', rating: 2 },
+  { name: 'A055', rating: 2 },
+  { name: 'A056', rating: 2 },
+  { name: 'A057', rating: 2 },
+  { name: 'A058', rating: 2 },
+  { name: 'A059', rating: 2 },
+  { name: 'A060', rating: 2 },
+  { name: 'A061', rating: 2 },
+  { name: 'A062', rating: 2 },
+  { name: 'A063', rating: 2 },
+  { name: 'A064', rating: 2 },
+  { name: 'A065', rating: 2 },
+  { name: 'A066', rating: 2 },
+  { name: 'A067', rating: 2 },
+  { name: 'A068', rating: 2 },
+  { name: 'A069', rating: 2 },
+  { name: 'A070', rating: 2 },
+  { name: 'A071', rating: 2 },
+  { name: 'A072', rating: 2 },
+  { name: 'A073', rating: 2 },
+  { name: 'A074', rating: 2 },
+  { name: 'A075', rating: 2 },
+  { name: 'A076', rating: 2 },
+  { name: 'A077', rating: 2 },
+  { name: 'A078', rating: 2 },
+  { name: 'A079', rating: 2 },
+  { name: 'A080', rating: 2 },
+  { name: 'A081', rating: 2 },
+  { name: 'A082', rating: 2 },
+  { name: 'A083', rating: 2 },
+  { name: 'A084', rating: 2 },
+  { name: 'A085', rating: 2 },
+  { name: 'A086', rating: 2 },
+  { name: 'A087', rating: 2 },
+  { name: 'A088', rating: 2 },
+  { name: 'A089', rating: 2 },
+  { name: 'A090', rating: 2 },
+  { name: 'A091', rating: 2 },
+  { name: 'A092', rating: 2 },
+  { name: 'A093', rating: 2 },
+  { name: 'A094', rating: 2 },
+  { name: 'A095', rating: 2 },
+  { name: 'A096', rating: 2 },
+  { name: 'A097', rating: 2 },
+  { name: 'A098', rating: 2 },
+  { name: 'A099', rating: 2 },
+  { name: 'A100', rating: 2 },
+  { name: 'A101', rating: 2 },
+  { name: 'A102', rating: 2 },
+  { name: 'A103', rating: 2 },
+  { name: 'A104', rating: 2 },
+  { name: 'A105', rating: 2 },
+  { name: 'A106', rating: 2 },
+  { name: 'A107', rating: 2 },
+  { name: 'A108', rating: 2 },
+  { name: 'A109', rating: 2 },
+  { name: 'A110', rating: 2 },
+  { name: 'A111', rating: 2 },
+  { name: 'A112', rating: 2 },
+  { name: 'A113', rating: 2 },
+  { name: 'A114', rating: 2 },
+  { name: 'A115', rating: 2 },
+  { name: 'A116', rating: 2 },
+  { name: 'A117', rating: 2 },
+  { name: 'A118', rating: 2 },
+  { name: 'A119', rating: 2 },
+  { name: 'A120', rating: 2 },
+  { name: 'A121', rating: 2 },
+  { name: 'A122', rating: 2 },
+  { name: 'A123', rating: 2 },
+  { name: 'A124', rating: 2 },
+  { name: 'A125', rating: 2 },
+  { name: 'A126', rating: 2 },
+  { name: 'A127', rating: 2 },
+  { name: 'A128', rating: 2 },
+  { name: 'A129', rating: 2 },
+  { name: 'A130', rating: 2 },
+  { name: 'A131', rating: 2 },
+  { name: 'A132', rating: 2 },
+  { name: 'A133', rating: 2 },
+  { name: 'A134', rating: 2 },
+  { name: 'A135', rating: 2 },
+  { name: 'A136', rating: 2 },
+  { name: 'A137', rating: 2 },
+  { name: 'A138', rating: 2 },
+  { name: 'A139', rating: 2 },
+  { name: 'A140', rating: 2 },
+  { name: 'A141', rating: 2 },
+  { name: 'A142', rating: 2 },
+  { name: 'A143', rating: 2 },
+  { name: 'A144', rating: 2 },
+  { name: 'A145', rating: 2 },
+  { name: 'A146', rating: 2 },
+  { name: 'A147', rating: 2 },
+  { name: 'A148', rating: 2 },
+  { name: 'A149', rating: 2 },
+  { name: 'A150', rating: 2 },
+  { name: 'A151', rating: 2 },
+  { name: 'A152', rating: 2 },
+  { name: 'A153', rating: 2 },
+  { name: 'A154', rating: 2 },
+  { name: 'A155', rating: 2 },
+  { name: 'A156', rating: 2 },
+  { name: 'A157', rating: 2 },
+  { name: 'A158', rating: 2 },
+  { name: 'A159', rating: 2 },
+  { name: 'A160', rating: 2 },
+  { name: 'A161', rating: 2 },
+  { name: 'A162', rating: 2 },
+  { name: 'A163', rating: 2 },
+  { name: 'A164', rating: 2 },
+  { name: 'A165', rating: 2 },
+  { name: 'A166', rating: 2 },
+  { name: 'A167', rating: 2 },
+  { name: 'A168', rating: 2 },
+  { name: 'A169', rating: 2 },
+  { name: 'A170', rating: 2 },
+  { name: 'A171', rating: 2 },
+  { name: 'A172', rating: 2 },
+  { name: 'A173', rating: 2 },
+  { name: 'A174', rating: 2 },
+  { name: 'A175', rating: 2 },
+  { name: 'A176', rating: 2 },
+  { name: 'A177', rating: 2 },
+  { name: 'A178', rating: 2 },
+  { name: 'A179', rating: 2 },
+  { name: 'A180', rating: 2 },
+  { name: 'A181', rating: 2 },
+  { name: 'A182', rating: 2 },
+  { name: 'A183', rating: 2 },
+  { name: 'A184', rating: 2 },
+  { name: 'A185', rating: 2 },
+  { name: 'A186', rating: 2 },
+  { name: 'B000', rating: 3 },
+  { name: 'B001', rating: 3 },
+  { name: 'B002', rating: 3 },
+  { name: 'B003', rating: 3 },
+  { name: 'B004', rating: 3 },
+  { name: 'B005', rating: 3 },
+  { name: 'B006', rating: 3 },
+  { name: 'B007', rating: 3 },
+  { name: 'B008', rating: 3 },
+  { name: 'B009', rating: 3 },
+  { name: 'B010', rating: 3 },
+  { name: 'B011', rating: 3 },
+  { name: 'B012', rating: 3 },
+  { name: 'B013', rating: 3 },
+  { name: 'B014', rating: 3 },
+  { name: 'B015', rating: 3 },
+  { name: 'B016', rating: 3 },
+  { name: 'B017', rating: 3 },
+  { name: 'B018', rating: 3 },
+  { name: 'B019', rating: 3 },
+  { name: 'B020', rating: 3 },
+  { name: 'B021', rating: 3 },
+  { name: 'B022', rating: 3 },
+  { name: 'B023', rating: 3 },
+  { name: 'B024', rating: 3 },
+  { name: 'B025', rating: 3 },
+  { name: 'B026', rating: 3 },
+  { name: 'B027', rating: 3 },
+  { name: 'B028', rating: 3 },
+  { name: 'B029', rating: 3 },
+  { name: 'B030', rating: 3 },
+  { name: 'B031', rating: 3 },
+  { name: 'B032', rating: 3 },
+  { name: 'B033', rating: 3 },
+  { name: 'B034', rating: 3 },
+  { name: 'B035', rating: 3 },
+  { name: 'B036', rating: 3 },
+  { name: 'B037', rating: 3 },
+  { name: 'B038', rating: 3 },
+  { name: 'B039', rating: 3 },
+  { name: 'B040', rating: 3 },
+  { name: 'B041', rating: 3 },
+  { name: 'B042', rating: 3 },
+  { name: 'B043', rating: 3 },
+  { name: 'B044', rating: 3 },
+  { name: 'B045', rating: 3 },
+  { name: 'B046', rating: 3 },
+  { name: 'B047', rating: 3 },
+  { name: 'B048', rating: 3 },
+  { name: 'B049', rating: 3 },
+  { name: 'B050', rating: 3 },
+  { name: 'B051', rating: 3 },
+  { name: 'B052', rating: 3 },
+  { name: 'B053', rating: 3 },
+  { name: 'B054', rating: 3 },
+  { name: 'B055', rating: 3 },
+  { name: 'B056', rating: 3 },
+  { name: 'B057', rating: 3 },
+  { name: 'B058', rating: 3 },
+  { name: 'B059', rating: 3 },
+  { name: 'B060', rating: 3 },
+  { name: 'B061', rating: 3 },
+  { name: 'B062', rating: 3 },
+  { name: 'B063', rating: 3 },
+  { name: 'B064', rating: 3 },
+  { name: 'B065', rating: 3 },
+  { name: 'B066', rating: 3 },
+  { name: 'B067', rating: 3 },
+  { name: 'B068', rating: 3 },
+  { name: 'B069', rating: 3 },
+  { name: 'B070', rating: 3 },
+  { name: 'B071', rating: 3 },
+  { name: 'B072', rating: 3 },
+  { name: 'B073', rating: 3 },
+  { name: 'B074', rating: 3 },
+  { name: 'B075', rating: 3 },
+  { name: 'B076', rating: 3 },
+  { name: 'B077', rating: 3 },
+  { name: 'B078', rating: 3 },
+  { name: 'B079', rating: 3 },
+  { name: 'B080', rating: 3 },
+  { name: 'B081', rating: 3 },
+  { name: 'B082', rating: 3 },
+  { name: 'B083', rating: 3 },
+  { name: 'B084', rating: 3 },
+  { name: 'B085', rating: 3 },
+  { name: 'B086', rating: 3 },
+  { name: 'B087', rating: 3 },
+  { name: 'B088', rating: 3 },
+  { name: 'B089', rating: 3 },
+  { name: 'B090', rating: 3 },
+  { name: 'B091', rating: 3 },
+  { name: 'B092', rating: 3 },
+  { name: 'B093', rating: 3 },
+  { name: 'B094', rating: 3 },
+  { name: 'B095', rating: 3 },
+  { name: 'B096', rating: 3 },
+  { name: 'B097', rating: 3 },
+  { name: 'B098', rating: 3 },
+  { name: 'B099', rating: 3 },
+  { name: 'B100', rating: 3 },
+  { name: 'B101', rating: 3 },
+  { name: 'B102', rating: 3 },
+  { name: 'B103', rating: 3 },
+  { name: 'B104', rating: 3 },
+  { name: 'B105', rating: 3 },
+  { name: 'B106', rating: 3 },
+  { name: 'B107', rating: 3 },
+  { name: 'B108', rating: 3 },
+  { name: 'B109', rating: 3 },
+  { name: 'B110', rating: 3 },
+  { name: 'B111', rating: 3 },
+  { name: 'B112', rating: 3 },
+  { name: 'B113', rating: 3 },
+  { name: 'B114', rating: 3 },
+  { name: 'B115', rating: 3 },
+  { name: 'B116', rating: 3 },
+  { name: 'B117', rating: 3 },
+  { name: 'B118', rating: 3 },
+  { name: 'B119', rating: 3 },
+  { name: 'B120', rating: 3 },
+  { name: 'B121', rating: 3 },
+  { name: 'B122', rating: 3 },
+  { name: 'B123', rating: 3 },
+  { name: 'B124', rating: 3 },
+  { name: 'B125', rating: 3 },
+  { name: 'B126', rating: 3 },
+  { name: 'B127', rating: 3 },
+  { name: 'B128', rating: 3 },
+  { name: 'B129', rating: 3 },
+  { name: 'B130', rating: 3 },
+  { name: 'B131', rating: 3 },
+  { name: 'B132', rating: 3 },
+  { name: 'B133', rating: 3 },
+  { name: 'B134', rating: 3 },
+  { name: 'B135', rating: 3 },
+  { name: 'B136', rating: 3 },
+  { name: 'B137', rating: 3 },
+  { name: 'B138', rating: 3 },
+  { name: 'B139', rating: 3 },
+  { name: 'B140', rating: 3 },
+  { name: 'B141', rating: 3 },
+  { name: 'B142', rating: 3 },
+  { name: 'B143', rating: 3 },
+  { name: 'B144', rating: 3 },
+  { name: 'B145', rating: 3 },
+  { name: 'B146', rating: 3 },
+  { name: 'B147', rating: 3 },
+  { name: 'B148', rating: 3 },
+  { name: 'B149', rating: 3 },
+  { name: 'B150', rating: 3 },
+  { name: 'B151', rating: 3 },
+  { name: 'B152', rating: 3 },
+  { name: 'B153', rating: 3 },
+  { name: 'B154', rating: 3 },
+  { name: 'B155', rating: 3 },
+  { name: 'B156', rating: 3 },
+  { name: 'B157', rating: 3 },
+  { name: 'B158', rating: 3 },
+  { name: 'B159', rating: 3 },
+  { name: 'B160', rating: 3 },
+  { name: 'B161', rating: 3 },
+  { name: 'B162', rating: 3 },
+  { name: 'B163', rating: 3 },
+  { name: 'B164', rating: 3 },
+  { name: 'B165', rating: 3 },
+  { name: 'B166', rating: 3 },
+  { name: 'B167', rating: 3 },
+  { name: 'B168', rating: 3 },
+  { name: 'B169', rating: 3 },
+  { name: 'B170', rating: 3 },
+  { name: 'B171', rating: 3 },
+  { name: 'B172', rating: 3 },
+  { name: 'B173', rating: 3 },
+  { name: 'B174', rating: 3 },
+  { name: 'B175', rating: 3 },
+  { name: 'B176', rating: 3 },
+  { name: 'B177', rating: 3 },
+  { name: 'B178', rating: 3 },
+  { name: 'B179', rating: 3 },
+  { name: 'B180', rating: 3 },
+  { name: 'B181', rating: 3 },
+  { name: 'B182', rating: 3 },
+  { name: 'B183', rating: 3 },
+  { name: 'B184', rating: 3 },
+  { name: 'B185', rating: 3 },
+  { name: 'B186', rating: 3 },
+  { name: 'C000', rating: 2 },
+  { name: 'C001', rating: 2 },
+  { name: 'C002', rating: 2 },
+  { name: 'C003', rating: 2 },
+  { name: 'C004', rating: 2 },
+  { name: 'C005', rating: 2 },
+  { name: 'C006', rating: 2 },
+  { name: 'C007', rating: 2 },
+  { name: 'C008', rating: 2 },
+  { name: 'C009', rating: 2 },
+  { name: 'C010', rating: 2 },
+  { name: 'C011', rating: 2 },
+  { name: 'C012', rating: 2 },
+  { name: 'C013', rating: 2 },
+  { name: 'C014', rating: 2 },
+  { name: 'C015', rating: 2 },
+  { name: 'C016', rating: 2 },
+  { name: 'C017', rating: 2 },
+  { name: 'C018', rating: 2 },
+  { name: 'C019', rating: 2 },
+  { name: 'C020', rating: 2 },
+  { name: 'C021', rating: 2 },
+  { name: 'C022', rating: 2 },
+  { name: 'C023', rating: 2 },
+  { name: 'C024', rating: 2 },
+  { name: 'C025', rating: 2 },
+  { name: 'C026', rating: 2 },
+  { name: 'C027', rating: 2 },
+  { name: 'C028', rating: 2 },
+  { name: 'C029', rating: 2 },
+  { name: 'C030', rating: 2 },
+  { name: 'C031', rating: 2 },
+  { name: 'C032', rating: 2 },
+  { name: 'C033', rating: 2 },
+  { name: 'C034', rating: 2 },
+  { name: 'C035', rating: 2 },
+  { name: 'C036', rating: 2 },
+  { name: 'C037', rating: 2 },
+  { name: 'C038', rating: 2 },
+  { name: 'C039', rating: 2 },
+  { name: 'C040', rating: 2 },
+  { name: 'C041', rating: 2 },
+  { name: 'C042', rating: 2 },
+  { name: 'C043', rating: 2 },
+  { name: 'C044', rating: 2 },
+  { name: 'C045', rating: 2 },
+  { name: 'C046', rating: 2 },
+  { name: 'C047', rating: 2 },
+  { name: 'C048', rating: 2 },
+  { name: 'C049', rating: 2 },
+  { name: 'C050', rating: 2 },
+  { name: 'C051', rating: 2 },
+  { name: 'C052', rating: 2 },
+  { name: 'C053', rating: 2 },
+  { name: 'C054', rating: 2 },
+  { name: 'C055', rating: 2 },
+  { name: 'C056', rating: 2 },
+  { name: 'C057', rating: 2 },
+  { name: 'C058', rating: 2 },
+  { name: 'C059', rating: 2 },
+  { name: 'C060', rating: 2 },
+  { name: 'C061', rating: 2 },
+  { name: 'C062', rating: 2 },
+  { name: 'C063', rating: 2 },
+  { name: 'C064', rating: 2 },
+  { name: 'C065', rating: 2 },
+  { name: 'C066', rating: 2 },
+  { name: 'C067', rating: 2 },
+  { name: 'C068', rating: 2 },
+  { name: 'C069', rating: 2 },
+  { name: 'C070', rating: 2 },
+  { name: 'C071', rating: 2 },
+  { name: 'C072', rating: 2 },
+  { name: 'C073', rating: 2 },
+  { name: 'C074', rating: 2 },
+  { name: 'C075', rating: 2 },
+  { name: 'C076', rating: 2 },
+  { name: 'C077', rating: 2 },
+  { name: 'C078', rating: 2 },
+  { name: 'C079', rating: 2 },
+  { name: 'C080', rating: 2 },
+  { name: 'C081', rating: 2 },
+  { name: 'C082', rating: 2 },
+  { name: 'C083', rating: 2 },
+  { name: 'C084', rating: 2 },
+  { name: 'C085', rating: 2 },
+  { name: 'C086', rating: 2 },
+  { name: 'C087', rating: 2 },
+  { name: 'C088', rating: 2 },
+  { name: 'C089', rating: 2 },
+  { name: 'C090', rating: 2 },
+  { name: 'C091', rating: 2 },
+  { name: 'C092', rating: 2 },
+  { name: 'C093', rating: 2 },
+  { name: 'C094', rating: 2 },
+  { name: 'C095', rating: 2 },
+  { name: 'C096', rating: 2 },
+  { name: 'C097', rating: 2 },
+  { name: 'C098', rating: 2 },
+  { name: 'C099', rating: 2 },
+  { name: 'C100', rating: 2 },
+  { name: 'C101', rating: 2 },
+  { name: 'C102', rating: 2 },
+  { name: 'C103', rating: 2 },
+  { name: 'C104', rating: 2 },
+  { name: 'C105', rating: 2 },
+  { name: 'C106', rating: 2 },
+  { name: 'C107', rating: 2 },
+  { name: 'C108', rating: 2 },
+  { name: 'C109', rating: 2 },
+  { name: 'C110', rating: 2 },
+  { name: 'C111', rating: 2 },
+  { name: 'C112', rating: 2 },
+  { name: 'C113', rating: 2 },
+  { name: 'C114', rating: 2 },
+  { name: 'C115', rating: 2 },
+  { name: 'C116', rating: 2 },
+  { name: 'C117', rating: 2 },
+  { name: 'C118', rating: 2 },
+  { name: 'C119', rating: 2 },
+  { name: 'C120', rating: 2 },
+  { name: 'C121', rating: 2 },
+  { name: 'C122', rating: 2 },
+  { name: 'C123', rating: 2 },
+  { name: 'C124', rating: 2 },
+  { name: 'C125', rating: 2 },
+  { name: 'C126', rating: 2 },
+  { name: 'C127', rating: 2 },
+  { name: 'C128', rating: 2 },
+  { name: 'C129', rating: 2 },
+  { name: 'C130', rating: 2 },
+  { name: 'C131', rating: 2 },
+  { name: 'C132', rating: 2 },
+  { name: 'C133', rating: 2 },
+  { name: 'C134', rating: 2 },
+  { name: 'C135', rating: 2 },
+  { name: 'C136', rating: 2 },
+  { name: 'C137', rating: 2 },
+  { name: 'C138', rating: 2 },
+  { name: 'C139', rating: 2 },
+  { name: 'C140', rating: 2 },
+  { name: 'C141', rating: 2 },
+  { name: 'C142', rating: 2 },
+  { name: 'C143', rating: 2 },
+  { name: 'C144', rating: 2 },
+  { name: 'C145', rating: 2 },
+  { name: 'C146', rating: 2 },
+  { name: 'C147', rating: 2 },
+  { name: 'C148', rating: 2 },
+  { name: 'C149', rating: 2 },
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+  { name: 'I118', rating: 2 },
+  { name: 'I119', rating: 2 },
+  { name: 'I120', rating: 2 },
+  { name: 'I121', rating: 2 },
+  { name: 'I122', rating: 2 },
+  { name: 'I123', rating: 2 },
+  { name: 'I124', rating: 2 },
+  { name: 'I125', rating: 2 },
+  { name: 'I126', rating: 2 },
+  { name: 'I127', rating: 2 },
+  { name: 'I128', rating: 2 },
+  { name: 'I129', rating: 2 },
+  { name: 'I130', rating: 2 },
+  { name: 'I131', rating: 2 },
+  { name: 'I132', rating: 2 },
+  { name: 'I133', rating: 2 },
+  { name: 'I134', rating: 2 },
+  { name: 'I135', rating: 2 },
+  { name: 'I136', rating: 2 },
+  { name: 'I137', rating: 2 },
+  { name: 'I138', rating: 2 },
+  { name: 'I139', rating: 2 },
+  { name: 'I140', rating: 2 },
+  { name: 'I141', rating: 2 },
+  { name: 'I142', rating: 2 },
+  { name: 'I143', rating: 2 },
+  { name: 'I144', rating: 2 },
+  { name: 'I145', rating: 2 },
+  { name: 'I146', rating: 2 },
+  { name: 'I147', rating: 2 },
+  { name: 'I148', rating: 2 },
+  { name: 'I149', rating: 2 },
+  { name: 'I150', rating: 2 },
+  { name: 'I151', rating: 2 },
+  { name: 'I152', rating: 2 },
+  { name: 'I153', rating: 2 },
+  { name: 'I154', rating: 2 },
+  { name: 'I155', rating: 2 },
+  { name: 'I156', rating: 2 },
+  { name: 'I157', rating: 2 },
+  { name: 'I158', rating: 2 },
+  { name: 'I159', rating: 2 },
+  { name: 'I160', rating: 2 },
+  { name: 'I161', rating: 2 },
+  { name: 'I162', rating: 2 },
+  { name: 'I163', rating: 2 },
+  { name: 'I164', rating: 2 },
+  { name: 'I165', rating: 2 },
+  { name: 'I166', rating: 2 },
+  { name: 'I167', rating: 2 },
+  { name: 'I168', rating: 2 },
+  { name: 'I169', rating: 2 },
+  { name: 'I170', rating: 2 },
+  { name: 'I171', rating: 2 },
+  { name: 'I172', rating: 2 },
+  { name: 'I173', rating: 2 },
+  { name: 'I174', rating: 2 },
+  { name: 'I175', rating: 2 },
+  { name: 'I176', rating: 2 },
+  { name: 'I177', rating: 2 },
+  { name: 'I178', rating: 2 },
+  { name: 'I179', rating: 2 },
+  { name: 'I180', rating: 2 },
+  { name: 'I181', rating: 2 },
+  { name: 'I182', rating: 2 },
+  { name: 'I183', rating: 2 },
+  { name: 'I184', rating: 2 },
+  { name: 'I185', rating: 2 },
+  { name: 'I186', rating: 2 },
+  { name: 'J000', rating: 2 },
+  { name: 'J001', rating: 2 },
+  { name: 'J002', rating: 2 },
+  { name: 'J003', rating: 2 },
+  { name: 'J004', rating: 2 },
+  { name: 'J005', rating: 2 },
+  { name: 'J006', rating: 2 },
+  { name: 'J007', rating: 2 },
+  { name: 'J008', rating: 2 },
+  { name: 'J009', rating: 2 },
+  { name: 'J010', rating: 2 },
+  { name: 'J011', rating: 2 },
+  { name: 'J012', rating: 2 },
+  { name: 'J013', rating: 2 },
+  { name: 'J014', rating: 2 },
+  { name: 'J015', rating: 2 },
+  { name: 'J016', rating: 2 },
+  { name: 'J017', rating: 2 },
+  { name: 'J018', rating: 2 },
+  { name: 'J019', rating: 2 },
+  { name: 'J020', rating: 2 },
+  { name: 'J021', rating: 2 },
+  { name: 'J022', rating: 2 },
+  { name: 'J023', rating: 2 },
+  { name: 'J024', rating: 2 },
+  { name: 'J025', rating: 2 },
+  { name: 'J026', rating: 2 },
+  { name: 'J027', rating: 2 },
+  { name: 'J028', rating: 2 },
+  { name: 'J029', rating: 2 },
+  { name: 'J030', rating: 2 },
+  { name: 'J031', rating: 2 },
+  { name: 'J032', rating: 2 },
+  { name: 'J033', rating: 2 },
+  { name: 'J034', rating: 2 },
+  { name: 'J035', rating: 2 },
+  { name: 'J036', rating: 2 },
+  { name: 'J037', rating: 2 },
+  { name: 'J038', rating: 2 },
+  { name: 'J039', rating: 2 },
+  { name: 'J040', rating: 2 },
+  { name: 'J041', rating: 2 },
+  { name: 'J042', rating: 2 },
+  { name: 'J043', rating: 2 },
+  { name: 'J044', rating: 2 },
+  { name: 'J045', rating: 2 },
+  { name: 'J046', rating: 2 },
+  { name: 'J047', rating: 2 },
+  { name: 'J048', rating: 2 },
+  { name: 'J049', rating: 2 },
+  { name: 'J050', rating: 2 },
+  { name: 'J051', rating: 2 },
+  { name: 'J052', rating: 2 },
+  { name: 'J053', rating: 2 },
+  { name: 'J054', rating: 2 },
+  { name: 'J055', rating: 2 },
+  { name: 'J056', rating: 2 },
+  { name: 'J057', rating: 2 },
+  { name: 'J058', rating: 2 },
+  { name: 'J059', rating: 2 },
+  { name: 'J060', rating: 2 },
+  { name: 'J061', rating: 2 },
+  { name: 'J062', rating: 2 },
+  { name: 'J063', rating: 2 },
+  { name: 'J064', rating: 2 },
+  { name: 'J065', rating: 2 },
+  { name: 'J066', rating: 2 },
+  { name: 'J067', rating: 2 },
+  { name: 'J068', rating: 2 },
+  { name: 'J069', rating: 2 },
+  { name: 'J070', rating: 2 },
+  { name: 'J071', rating: 2 },
+  { name: 'J072', rating: 2 },
+  { name: 'J073', rating: 2 },
+  { name: 'J074', rating: 2 },
+  { name: 'J075', rating: 2 },
+  { name: 'J076', rating: 2 },
+  { name: 'J077', rating: 2 },
+  { name: 'J078', rating: 2 },
+  { name: 'J079', rating: 2 },
+  { name: 'J080', rating: 2 },
+  { name: 'J081', rating: 2 },
+  { name: 'J082', rating: 2 },
+  { name: 'J083', rating: 2 },
+  { name: 'J084', rating: 2 },
+  { name: 'J085', rating: 2 },
+  { name: 'J086', rating: 2 },
+  { name: 'J087', rating: 2 },
+  { name: 'J088', rating: 2 },
+  { name: 'J089', rating: 2 },
+  { name: 'J090', rating: 2 },
+  { name: 'J091', rating: 2 },
+  { name: 'J092', rating: 2 },
+  { name: 'J093', rating: 2 },
+  { name: 'J094', rating: 2 },
+  { name: 'J095', rating: 2 },
+  { name: 'J096', rating: 2 },
+  { name: 'J097', rating: 2 },
+  { name: 'J098', rating: 2 },
+  { name: 'J099', rating: 2 },
+  { name: 'J100', rating: 2 },
+  { name: 'J101', rating: 2 },
+  { name: 'J102', rating: 2 },
+  { name: 'J103', rating: 2 },
+  { name: 'J104', rating: 2 },
+  { name: 'J105', rating: 2 },
+  { name: 'J106', rating: 2 },
+  { name: 'J107', rating: 2 },
+  { name: 'J108', rating: 2 },
+  { name: 'J109', rating: 2 },
+  { name: 'J110', rating: 2 },
+  { name: 'J111', rating: 2 },
+  { name: 'J112', rating: 2 },
+  { name: 'J113', rating: 2 },
+  { name: 'J114', rating: 2 },
+  { name: 'J115', rating: 2 },
+  { name: 'J116', rating: 2 },
+  { name: 'J117', rating: 2 },
+  { name: 'J118', rating: 2 },
+  { name: 'J119', rating: 2 },
+  { name: 'J120', rating: 2 },
+  { name: 'J121', rating: 2 },
+  { name: 'J122', rating: 2 },
+  { name: 'J123', rating: 2 },
+  { name: 'J124', rating: 2 },
+  { name: 'J125', rating: 2 },
+  { name: 'J126', rating: 2 },
+  { name: 'J127', rating: 2 },
+  { name: 'J128', rating: 2 },
+  { name: 'J129', rating: 2 },
+  { name: 'J130', rating: 2 },
+  { name: 'J131', rating: 2 },
+  { name: 'J132', rating: 2 },
+  { name: 'J133', rating: 2 },
+  { name: 'J134', rating: 2 },
+  { name: 'J135', rating: 2 },
+  { name: 'J136', rating: 2 },
+  { name: 'J137', rating: 2 },
+  { name: 'J138', rating: 2 },
+  { name: 'J139', rating: 2 },
+  { name: 'J140', rating: 2 },
+  { name: 'J141', rating: 2 },
+  { name: 'J142', rating: 2 },
+  { name: 'J143', rating: 2 },
+  { name: 'J144', rating: 2 },
+  { name: 'J145', rating: 2 },
+  { name: 'J146', rating: 2 },
+  { name: 'J147', rating: 2 },
+  { name: 'J148', rating: 2 },
+  { name: 'J149', rating: 2 },
+  { name: 'J150', rating: 2 },
+  { name: 'J151', rating: 2 },
+  { name: 'J152', rating: 2 },
+  { name: 'J153', rating: 2 },
+  { name: 'J154', rating: 2 },
+  { name: 'J155', rating: 2 },
+  { name: 'J156', rating: 2 },
+  { name: 'J157', rating: 2 },
+  { name: 'J158', rating: 2 },
+  { name: 'J159', rating: 2 },
+  { name: 'J160', rating: 2 },
+  { name: 'J161', rating: 2 },
+  { name: 'J162', rating: 2 },
+  { name: 'J163', rating: 2 },
+  { name: 'J164', rating: 2 },
+  { name: 'J165', rating: 2 },
+  { name: 'J166', rating: 2 },
+  { name: 'J167', rating: 2 },
+  { name: 'J168', rating: 2 },
+  { name: 'J169', rating: 2 },
+  { name: 'J170', rating: 2 },
+  { name: 'J171', rating: 2 },
+  { name: 'J172', rating: 2 },
+  { name: 'J173', rating: 2 },
+  { name: 'J174', rating: 2 },
+  { name: 'J175', rating: 2 },
+  { name: 'J176', rating: 2 },
+  { name: 'J177', rating: 2 },
+  { name: 'J178', rating: 2 },
+  { name: 'J179', rating: 2 },
+  { name: 'J180', rating: 2 },
+  { name: 'J181', rating: 2 },
+  { name: 'J182', rating: 2 },
+  { name: 'J183', rating: 2 },
+  { name: 'J184', rating: 2 },
+  { name: 'J185', rating: 2 },
+  { name: 'J186', rating: 2 },
+  { name: 'K000', rating: 2 },
+  { name: 'K001', rating: 2 },
+  { name: 'K002', rating: 2 },
+  { name: 'K003', rating: 2 },
+  { name: 'K004', rating: 2 },
+  { name: 'K005', rating: 2 },
+  { name: 'K006', rating: 2 },
+  { name: 'K007', rating: 2 },
+  { name: 'K008', rating: 2 },
+  { name: 'K009', rating: 2 },
+  { name: 'K010', rating: 2 },
+  { name: 'K011', rating: 2 },
+  { name: 'K012', rating: 2 },
+  { name: 'K013', rating: 2 },
+  { name: 'K014', rating: 2 },
+  { name: 'K015', rating: 2 },
+  { name: 'K016', rating: 2 },
+  { name: 'K017', rating: 2 },
+  { name: 'K018', rating: 2 },
+  { name: 'K019', rating: 2 },
+  { name: 'K020', rating: 2 },
+  { name: 'K021', rating: 2 },
+  { name: 'K022', rating: 2 },
+  { name: 'K023', rating: 2 },
+  { name: 'K024', rating: 2 },
+  { name: 'K025', rating: 2 },
+  { name: 'K026', rating: 2 },
+  { name: 'K027', rating: 2 },
+  { name: 'K028', rating: 2 },
+  { name: 'K029', rating: 2 },
+  { name: 'K030', rating: 2 },
+  { name: 'K031', rating: 2 },
+  { name: 'K032', rating: 2 },
+  { name: 'K033', rating: 2 },
+  { name: 'K034', rating: 2 },
+  { name: 'K035', rating: 2 },
+  { name: 'K036', rating: 2 },
+  { name: 'K037', rating: 2 },
+  { name: 'K038', rating: 2 },
+  { name: 'K039', rating: 2 },
+  { name: 'K040', rating: 2 },
+  { name: 'K041', rating: 2 },
+  { name: 'K042', rating: 2 },
+  { name: 'K043', rating: 2 },
+  { name: 'K044', rating: 2 },
+  { name: 'K045', rating: 2 },
+  { name: 'K046', rating: 2 },
+  { name: 'K047', rating: 2 },
+  { name: 'K048', rating: 2 },
+  { name: 'K049', rating: 2 },
+  { name: 'K050', rating: 2 },
+  { name: 'K051', rating: 2 },
+  { name: 'K052', rating: 2 },
+  { name: 'K053', rating: 2 },
+  { name: 'K054', rating: 2 },
+  { name: 'K055', rating: 2 },
+  { name: 'K056', rating: 2 },
+  { name: 'K057', rating: 2 },
+  { name: 'K058', rating: 2 },
+  { name: 'K059', rating: 2 },
+  { name: 'K060', rating: 2 },
+  { name: 'K061', rating: 2 },
+  { name: 'K062', rating: 2 },
+  { name: 'K063', rating: 2 },
+  { name: 'K064', rating: 2 },
+  { name: 'K065', rating: 2 },
+  { name: 'K066', rating: 2 },
+  { name: 'K067', rating: 2 },
+  { name: 'K068', rating: 2 },
+  { name: 'K069', rating: 2 },
+  { name: 'K070', rating: 2 },
+  { name: 'K071', rating: 2 },
+  { name: 'K072', rating: 2 },
+  { name: 'K073', rating: 2 },
+  { name: 'K074', rating: 2 },
+  { name: 'K075', rating: 2 },
+  { name: 'K076', rating: 2 },
+  { name: 'K077', rating: 2 },
+  { name: 'K078', rating: 2 },
+  { name: 'K079', rating: 2 },
+  { name: 'K080', rating: 2 },
+  { name: 'K081', rating: 2 },
+  { name: 'K082', rating: 2 },
+  { name: 'K083', rating: 2 },
+  { name: 'K084', rating: 2 },
+  { name: 'K085', rating: 2 },
+  { name: 'K086', rating: 2 },
+  { name: 'K087', rating: 2 },
+  { name: 'K088', rating: 2 },
+  { name: 'K089', rating: 2 },
+  { name: 'K090', rating: 2 },
+  { name: 'K091', rating: 2 },
+  { name: 'K092', rating: 2 },
+  { name: 'K093', rating: 2 },
+  { name: 'K094', rating: 2 },
+  { name: 'K095', rating: 2 },
+  { name: 'K096', rating: 2 },
+  { name: 'K097', rating: 2 },
+  { name: 'K098', rating: 2 },
+  { name: 'K099', rating: 2 },
+  { name: 'K100', rating: 2 },
+  { name: 'K101', rating: 2 },
+  { name: 'K102', rating: 2 },
+  { name: 'K103', rating: 2 },
+  { name: 'K104', rating: 2 },
+  { name: 'K105', rating: 2 },
+  { name: 'K106', rating: 2 },
+  { name: 'K107', rating: 2 },
+  { name: 'K108', rating: 2 },
+  { name: 'K109', rating: 2 },
+  { name: 'K110', rating: 2 },
+  { name: 'K111', rating: 2 },
+  { name: 'K112', rating: 2 },
+  { name: 'K113', rating: 2 },
+  { name: 'K114', rating: 2 },
+  { name: 'K115', rating: 2 },
+  { name: 'K116', rating: 2 },
+  { name: 'K117', rating: 2 },
+  { name: 'K118', rating: 2 },
+  { name: 'K119', rating: 2 },
+  { name: 'K120', rating: 2 },
+  { name: 'K121', rating: 2 },
+  { name: 'K122', rating: 2 },
+  { name: 'K123', rating: 2 },
+  { name: 'K124', rating: 2 },
+  { name: 'K125', rating: 2 },
+  { name: 'K126', rating: 2 },
+  { name: 'K127', rating: 2 },
+  { name: 'K128', rating: 2 },
+  { name: 'K129', rating: 2 },
+  { name: 'K130', rating: 2 },
+  { name: 'K131', rating: 2 },
+  { name: 'K132', rating: 2 },
+  { name: 'K133', rating: 2 },
+  { name: 'K134', rating: 2 },
+  { name: 'K135', rating: 2 },
+  { name: 'K136', rating: 2 },
+  { name: 'K137', rating: 2 },
+  { name: 'K138', rating: 2 },
+  { name: 'K139', rating: 2 },
+  { name: 'K140', rating: 2 },
+  { name: 'K141', rating: 2 },
+  { name: 'K142', rating: 2 },
+  { name: 'K143', rating: 2 },
+  { name: 'K144', rating: 2 },
+  { name: 'K145', rating: 2 },
+  { name: 'K146', rating: 2 },
+  { name: 'K147', rating: 2 },
+  { name: 'K148', rating: 2 },
+  { name: 'K149', rating: 2 },
+  { name: 'K150', rating: 2 },
+  { name: 'K151', rating: 2 },
+  { name: 'K152', rating: 2 },
+  { name: 'K153', rating: 2 },
+  { name: 'K154', rating: 2 },
+  { name: 'K155', rating: 2 },
+  { name: 'K156', rating: 2 },
+  { name: 'K157', rating: 2 },
+  { name: 'K158', rating: 2 },
+  { name: 'K159', rating: 2 },
+  { name: 'K160', rating: 2 },
+  { name: 'K161', rating: 2 },
+  { name: 'K162', rating: 2 },
+  { name: 'K163', rating: 2 },
+  { name: 'K164', rating: 2 },
+  { name: 'K165', rating: 2 },
+  { name: 'K166', rating: 2 },
+  { name: 'K167', rating: 2 },
+  { name: 'K168', rating: 2 },
+  { name: 'K169', rating: 2 },
+  { name: 'K170', rating: 2 },
+  { name: 'K171', rating: 2 },
+  { name: 'K172', rating: 2 },
+  { name: 'K173', rating: 2 },
+  { name: 'K174', rating: 2 },
+  { name: 'K175', rating: 2 },
+  { name: 'K176', rating: 2 },
+  { name: 'K177', rating: 2 },
+];
+assert.sameValue(array.length, 2048);
+
+// Sort the elements by `rating` in descending order.
+// (This updates `array` in place.)
+array.sort((a, b) => b.rating - a.rating);
+
+const reduced = array.reduce((acc, element) => {
+  const letter = element.name.slice(0, 1);
+  const previousLetter = acc.slice(-1);
+  if (previousLetter === letter) {
+    return acc;
+  }
+  return acc + letter;
+}, '');
+assert.sameValue(reduced, 'DGBEFHACIJK');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/sort/stability-5-elements.js b/js/src/tests/test262/built-ins/Array/prototype/sort/stability-5-elements.js
new file mode 100644
index 0000000000..76285695db
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/sort/stability-5-elements.js
@@ -0,0 +1,29 @@
+// Copyright (C) 2018 Mathias Bynens. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.sort
+description: >
+  Stability of Array.prototype.sort for an array with 5 elements.
+info: |
+  The sort is required to be stable (that is, elements that compare equal
+  remain in their original order).
+---*/
+
+const array = [
+  { name: 'A', rating: 2 },
+  { name: 'B', rating: 3 },
+  { name: 'C', rating: 2 },
+  { name: 'D', rating: 3 },
+  { name: 'E', rating: 3 },
+];
+assert.sameValue(array.length, 5);
+
+// Sort the elements by `rating` in descending order.
+// (This updates `array` in place.)
+array.sort((a, b) => b.rating - a.rating);
+
+const reduced = array.reduce((acc, element) => acc + element.name, '');
+assert.sameValue(reduced, 'BDEAC');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/sort/stability-513-elements.js b/js/src/tests/test262/built-ins/Array/prototype/sort/stability-513-elements.js
new file mode 100644
index 0000000000..8662a6d264
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/sort/stability-513-elements.js
@@ -0,0 +1,548 @@
+// Copyright (C) 2018 Mathias Bynens. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.sort
+description: >
+  Stability of Array.prototype.sort for an array with 513 elements.
+info: |
+  The sort is required to be stable (that is, elements that compare equal
+  remain in their original order).
+  The array length of 513 was chosen because until late 2018, Chakra
+  used to apply an unstable QuickSort for arrays with more than 512
+  elements, although it used a stable insertion sort for anything else.
+  https://github.com/Microsoft/ChakraCore/pull/5724
+---*/
+
+const array = [
+  { name: 'A00', rating: 2 },
+  { name: 'A01', rating: 2 },
+  { name: 'A02', rating: 2 },
+  { name: 'A03', rating: 2 },
+  { name: 'A04', rating: 2 },
+  { name: 'A05', rating: 2 },
+  { name: 'A06', rating: 2 },
+  { name: 'A07', rating: 2 },
+  { name: 'A08', rating: 2 },
+  { name: 'A09', rating: 2 },
+  { name: 'A10', rating: 2 },
+  { name: 'A11', rating: 2 },
+  { name: 'A12', rating: 2 },
+  { name: 'A13', rating: 2 },
+  { name: 'A14', rating: 2 },
+  { name: 'A15', rating: 2 },
+  { name: 'A16', rating: 2 },
+  { name: 'A17', rating: 2 },
+  { name: 'A18', rating: 2 },
+  { name: 'A19', rating: 2 },
+  { name: 'A20', rating: 2 },
+  { name: 'A21', rating: 2 },
+  { name: 'A22', rating: 2 },
+  { name: 'A23', rating: 2 },
+  { name: 'A24', rating: 2 },
+  { name: 'A25', rating: 2 },
+  { name: 'A26', rating: 2 },
+  { name: 'A27', rating: 2 },
+  { name: 'A28', rating: 2 },
+  { name: 'A29', rating: 2 },
+  { name: 'A30', rating: 2 },
+  { name: 'A31', rating: 2 },
+  { name: 'A32', rating: 2 },
+  { name: 'A33', rating: 2 },
+  { name: 'A34', rating: 2 },
+  { name: 'A35', rating: 2 },
+  { name: 'A36', rating: 2 },
+  { name: 'A37', rating: 2 },
+  { name: 'A38', rating: 2 },
+  { name: 'A39', rating: 2 },
+  { name: 'A40', rating: 2 },
+  { name: 'A41', rating: 2 },
+  { name: 'A42', rating: 2 },
+  { name: 'A43', rating: 2 },
+  { name: 'A44', rating: 2 },
+  { name: 'A45', rating: 2 },
+  { name: 'A46', rating: 2 },
+  { name: 'B00', rating: 3 },
+  { name: 'B01', rating: 3 },
+  { name: 'B02', rating: 3 },
+  { name: 'B03', rating: 3 },
+  { name: 'B04', rating: 3 },
+  { name: 'B05', rating: 3 },
+  { name: 'B06', rating: 3 },
+  { name: 'B07', rating: 3 },
+  { name: 'B08', rating: 3 },
+  { name: 'B09', rating: 3 },
+  { name: 'B10', rating: 3 },
+  { name: 'B11', rating: 3 },
+  { name: 'B12', rating: 3 },
+  { name: 'B13', rating: 3 },
+  { name: 'B14', rating: 3 },
+  { name: 'B15', rating: 3 },
+  { name: 'B16', rating: 3 },
+  { name: 'B17', rating: 3 },
+  { name: 'B18', rating: 3 },
+  { name: 'B19', rating: 3 },
+  { name: 'B20', rating: 3 },
+  { name: 'B21', rating: 3 },
+  { name: 'B22', rating: 3 },
+  { name: 'B23', rating: 3 },
+  { name: 'B24', rating: 3 },
+  { name: 'B25', rating: 3 },
+  { name: 'B26', rating: 3 },
+  { name: 'B27', rating: 3 },
+  { name: 'B28', rating: 3 },
+  { name: 'B29', rating: 3 },
+  { name: 'B30', rating: 3 },
+  { name: 'B31', rating: 3 },
+  { name: 'B32', rating: 3 },
+  { name: 'B33', rating: 3 },
+  { name: 'B34', rating: 3 },
+  { name: 'B35', rating: 3 },
+  { name: 'B36', rating: 3 },
+  { name: 'B37', rating: 3 },
+  { name: 'B38', rating: 3 },
+  { name: 'B39', rating: 3 },
+  { name: 'B40', rating: 3 },
+  { name: 'B41', rating: 3 },
+  { name: 'B42', rating: 3 },
+  { name: 'B43', rating: 3 },
+  { name: 'B44', rating: 3 },
+  { name: 'B45', rating: 3 },
+  { name: 'B46', rating: 3 },
+  { name: 'C00', rating: 2 },
+  { name: 'C01', rating: 2 },
+  { name: 'C02', rating: 2 },
+  { name: 'C03', rating: 2 },
+  { name: 'C04', rating: 2 },
+  { name: 'C05', rating: 2 },
+  { name: 'C06', rating: 2 },
+  { name: 'C07', rating: 2 },
+  { name: 'C08', rating: 2 },
+  { name: 'C09', rating: 2 },
+  { name: 'C10', rating: 2 },
+  { name: 'C11', rating: 2 },
+  { name: 'C12', rating: 2 },
+  { name: 'C13', rating: 2 },
+  { name: 'C14', rating: 2 },
+  { name: 'C15', rating: 2 },
+  { name: 'C16', rating: 2 },
+  { name: 'C17', rating: 2 },
+  { name: 'C18', rating: 2 },
+  { name: 'C19', rating: 2 },
+  { name: 'C20', rating: 2 },
+  { name: 'C21', rating: 2 },
+  { name: 'C22', rating: 2 },
+  { name: 'C23', rating: 2 },
+  { name: 'C24', rating: 2 },
+  { name: 'C25', rating: 2 },
+  { name: 'C26', rating: 2 },
+  { name: 'C27', rating: 2 },
+  { name: 'C28', rating: 2 },
+  { name: 'C29', rating: 2 },
+  { name: 'C30', rating: 2 },
+  { name: 'C31', rating: 2 },
+  { name: 'C32', rating: 2 },
+  { name: 'C33', rating: 2 },
+  { name: 'C34', rating: 2 },
+  { name: 'C35', rating: 2 },
+  { name: 'C36', rating: 2 },
+  { name: 'C37', rating: 2 },
+  { name: 'C38', rating: 2 },
+  { name: 'C39', rating: 2 },
+  { name: 'C40', rating: 2 },
+  { name: 'C41', rating: 2 },
+  { name: 'C42', rating: 2 },
+  { name: 'C43', rating: 2 },
+  { name: 'C44', rating: 2 },
+  { name: 'C45', rating: 2 },
+  { name: 'C46', rating: 2 },
+  { name: 'D00', rating: 4 },
+  { name: 'D01', rating: 4 },
+  { name: 'D02', rating: 4 },
+  { name: 'D03', rating: 4 },
+  { name: 'D04', rating: 4 },
+  { name: 'D05', rating: 4 },
+  { name: 'D06', rating: 4 },
+  { name: 'D07', rating: 4 },
+  { name: 'D08', rating: 4 },
+  { name: 'D09', rating: 4 },
+  { name: 'D10', rating: 4 },
+  { name: 'D11', rating: 4 },
+  { name: 'D12', rating: 4 },
+  { name: 'D13', rating: 4 },
+  { name: 'D14', rating: 4 },
+  { name: 'D15', rating: 4 },
+  { name: 'D16', rating: 4 },
+  { name: 'D17', rating: 4 },
+  { name: 'D18', rating: 4 },
+  { name: 'D19', rating: 4 },
+  { name: 'D20', rating: 4 },
+  { name: 'D21', rating: 4 },
+  { name: 'D22', rating: 4 },
+  { name: 'D23', rating: 4 },
+  { name: 'D24', rating: 4 },
+  { name: 'D25', rating: 4 },
+  { name: 'D26', rating: 4 },
+  { name: 'D27', rating: 4 },
+  { name: 'D28', rating: 4 },
+  { name: 'D29', rating: 4 },
+  { name: 'D30', rating: 4 },
+  { name: 'D31', rating: 4 },
+  { name: 'D32', rating: 4 },
+  { name: 'D33', rating: 4 },
+  { name: 'D34', rating: 4 },
+  { name: 'D35', rating: 4 },
+  { name: 'D36', rating: 4 },
+  { name: 'D37', rating: 4 },
+  { name: 'D38', rating: 4 },
+  { name: 'D39', rating: 4 },
+  { name: 'D40', rating: 4 },
+  { name: 'D41', rating: 4 },
+  { name: 'D42', rating: 4 },
+  { name: 'D43', rating: 4 },
+  { name: 'D44', rating: 4 },
+  { name: 'D45', rating: 4 },
+  { name: 'D46', rating: 4 },
+  { name: 'E00', rating: 3 },
+  { name: 'E01', rating: 3 },
+  { name: 'E02', rating: 3 },
+  { name: 'E03', rating: 3 },
+  { name: 'E04', rating: 3 },
+  { name: 'E05', rating: 3 },
+  { name: 'E06', rating: 3 },
+  { name: 'E07', rating: 3 },
+  { name: 'E08', rating: 3 },
+  { name: 'E09', rating: 3 },
+  { name: 'E10', rating: 3 },
+  { name: 'E11', rating: 3 },
+  { name: 'E12', rating: 3 },
+  { name: 'E13', rating: 3 },
+  { name: 'E14', rating: 3 },
+  { name: 'E15', rating: 3 },
+  { name: 'E16', rating: 3 },
+  { name: 'E17', rating: 3 },
+  { name: 'E18', rating: 3 },
+  { name: 'E19', rating: 3 },
+  { name: 'E20', rating: 3 },
+  { name: 'E21', rating: 3 },
+  { name: 'E22', rating: 3 },
+  { name: 'E23', rating: 3 },
+  { name: 'E24', rating: 3 },
+  { name: 'E25', rating: 3 },
+  { name: 'E26', rating: 3 },
+  { name: 'E27', rating: 3 },
+  { name: 'E28', rating: 3 },
+  { name: 'E29', rating: 3 },
+  { name: 'E30', rating: 3 },
+  { name: 'E31', rating: 3 },
+  { name: 'E32', rating: 3 },
+  { name: 'E33', rating: 3 },
+  { name: 'E34', rating: 3 },
+  { name: 'E35', rating: 3 },
+  { name: 'E36', rating: 3 },
+  { name: 'E37', rating: 3 },
+  { name: 'E38', rating: 3 },
+  { name: 'E39', rating: 3 },
+  { name: 'E40', rating: 3 },
+  { name: 'E41', rating: 3 },
+  { name: 'E42', rating: 3 },
+  { name: 'E43', rating: 3 },
+  { name: 'E44', rating: 3 },
+  { name: 'E45', rating: 3 },
+  { name: 'E46', rating: 3 },
+  { name: 'F00', rating: 3 },
+  { name: 'F01', rating: 3 },
+  { name: 'F02', rating: 3 },
+  { name: 'F03', rating: 3 },
+  { name: 'F04', rating: 3 },
+  { name: 'F05', rating: 3 },
+  { name: 'F06', rating: 3 },
+  { name: 'F07', rating: 3 },
+  { name: 'F08', rating: 3 },
+  { name: 'F09', rating: 3 },
+  { name: 'F10', rating: 3 },
+  { name: 'F11', rating: 3 },
+  { name: 'F12', rating: 3 },
+  { name: 'F13', rating: 3 },
+  { name: 'F14', rating: 3 },
+  { name: 'F15', rating: 3 },
+  { name: 'F16', rating: 3 },
+  { name: 'F17', rating: 3 },
+  { name: 'F18', rating: 3 },
+  { name: 'F19', rating: 3 },
+  { name: 'F20', rating: 3 },
+  { name: 'F21', rating: 3 },
+  { name: 'F22', rating: 3 },
+  { name: 'F23', rating: 3 },
+  { name: 'F24', rating: 3 },
+  { name: 'F25', rating: 3 },
+  { name: 'F26', rating: 3 },
+  { name: 'F27', rating: 3 },
+  { name: 'F28', rating: 3 },
+  { name: 'F29', rating: 3 },
+  { name: 'F30', rating: 3 },
+  { name: 'F31', rating: 3 },
+  { name: 'F32', rating: 3 },
+  { name: 'F33', rating: 3 },
+  { name: 'F34', rating: 3 },
+  { name: 'F35', rating: 3 },
+  { name: 'F36', rating: 3 },
+  { name: 'F37', rating: 3 },
+  { name: 'F38', rating: 3 },
+  { name: 'F39', rating: 3 },
+  { name: 'F40', rating: 3 },
+  { name: 'F41', rating: 3 },
+  { name: 'F42', rating: 3 },
+  { name: 'F43', rating: 3 },
+  { name: 'F44', rating: 3 },
+  { name: 'F45', rating: 3 },
+  { name: 'F46', rating: 3 },
+  { name: 'G00', rating: 4 },
+  { name: 'G01', rating: 4 },
+  { name: 'G02', rating: 4 },
+  { name: 'G03', rating: 4 },
+  { name: 'G04', rating: 4 },
+  { name: 'G05', rating: 4 },
+  { name: 'G06', rating: 4 },
+  { name: 'G07', rating: 4 },
+  { name: 'G08', rating: 4 },
+  { name: 'G09', rating: 4 },
+  { name: 'G10', rating: 4 },
+  { name: 'G11', rating: 4 },
+  { name: 'G12', rating: 4 },
+  { name: 'G13', rating: 4 },
+  { name: 'G14', rating: 4 },
+  { name: 'G15', rating: 4 },
+  { name: 'G16', rating: 4 },
+  { name: 'G17', rating: 4 },
+  { name: 'G18', rating: 4 },
+  { name: 'G19', rating: 4 },
+  { name: 'G20', rating: 4 },
+  { name: 'G21', rating: 4 },
+  { name: 'G22', rating: 4 },
+  { name: 'G23', rating: 4 },
+  { name: 'G24', rating: 4 },
+  { name: 'G25', rating: 4 },
+  { name: 'G26', rating: 4 },
+  { name: 'G27', rating: 4 },
+  { name: 'G28', rating: 4 },
+  { name: 'G29', rating: 4 },
+  { name: 'G30', rating: 4 },
+  { name: 'G31', rating: 4 },
+  { name: 'G32', rating: 4 },
+  { name: 'G33', rating: 4 },
+  { name: 'G34', rating: 4 },
+  { name: 'G35', rating: 4 },
+  { name: 'G36', rating: 4 },
+  { name: 'G37', rating: 4 },
+  { name: 'G38', rating: 4 },
+  { name: 'G39', rating: 4 },
+  { name: 'G40', rating: 4 },
+  { name: 'G41', rating: 4 },
+  { name: 'G42', rating: 4 },
+  { name: 'G43', rating: 4 },
+  { name: 'G44', rating: 4 },
+  { name: 'G45', rating: 4 },
+  { name: 'G46', rating: 4 },
+  { name: 'H00', rating: 3 },
+  { name: 'H01', rating: 3 },
+  { name: 'H02', rating: 3 },
+  { name: 'H03', rating: 3 },
+  { name: 'H04', rating: 3 },
+  { name: 'H05', rating: 3 },
+  { name: 'H06', rating: 3 },
+  { name: 'H07', rating: 3 },
+  { name: 'H08', rating: 3 },
+  { name: 'H09', rating: 3 },
+  { name: 'H10', rating: 3 },
+  { name: 'H11', rating: 3 },
+  { name: 'H12', rating: 3 },
+  { name: 'H13', rating: 3 },
+  { name: 'H14', rating: 3 },
+  { name: 'H15', rating: 3 },
+  { name: 'H16', rating: 3 },
+  { name: 'H17', rating: 3 },
+  { name: 'H18', rating: 3 },
+  { name: 'H19', rating: 3 },
+  { name: 'H20', rating: 3 },
+  { name: 'H21', rating: 3 },
+  { name: 'H22', rating: 3 },
+  { name: 'H23', rating: 3 },
+  { name: 'H24', rating: 3 },
+  { name: 'H25', rating: 3 },
+  { name: 'H26', rating: 3 },
+  { name: 'H27', rating: 3 },
+  { name: 'H28', rating: 3 },
+  { name: 'H29', rating: 3 },
+  { name: 'H30', rating: 3 },
+  { name: 'H31', rating: 3 },
+  { name: 'H32', rating: 3 },
+  { name: 'H33', rating: 3 },
+  { name: 'H34', rating: 3 },
+  { name: 'H35', rating: 3 },
+  { name: 'H36', rating: 3 },
+  { name: 'H37', rating: 3 },
+  { name: 'H38', rating: 3 },
+  { name: 'H39', rating: 3 },
+  { name: 'H40', rating: 3 },
+  { name: 'H41', rating: 3 },
+  { name: 'H42', rating: 3 },
+  { name: 'H43', rating: 3 },
+  { name: 'H44', rating: 3 },
+  { name: 'H45', rating: 3 },
+  { name: 'H46', rating: 3 },
+  { name: 'I00', rating: 2 },
+  { name: 'I01', rating: 2 },
+  { name: 'I02', rating: 2 },
+  { name: 'I03', rating: 2 },
+  { name: 'I04', rating: 2 },
+  { name: 'I05', rating: 2 },
+  { name: 'I06', rating: 2 },
+  { name: 'I07', rating: 2 },
+  { name: 'I08', rating: 2 },
+  { name: 'I09', rating: 2 },
+  { name: 'I10', rating: 2 },
+  { name: 'I11', rating: 2 },
+  { name: 'I12', rating: 2 },
+  { name: 'I13', rating: 2 },
+  { name: 'I14', rating: 2 },
+  { name: 'I15', rating: 2 },
+  { name: 'I16', rating: 2 },
+  { name: 'I17', rating: 2 },
+  { name: 'I18', rating: 2 },
+  { name: 'I19', rating: 2 },
+  { name: 'I20', rating: 2 },
+  { name: 'I21', rating: 2 },
+  { name: 'I22', rating: 2 },
+  { name: 'I23', rating: 2 },
+  { name: 'I24', rating: 2 },
+  { name: 'I25', rating: 2 },
+  { name: 'I26', rating: 2 },
+  { name: 'I27', rating: 2 },
+  { name: 'I28', rating: 2 },
+  { name: 'I29', rating: 2 },
+  { name: 'I30', rating: 2 },
+  { name: 'I31', rating: 2 },
+  { name: 'I32', rating: 2 },
+  { name: 'I33', rating: 2 },
+  { name: 'I34', rating: 2 },
+  { name: 'I35', rating: 2 },
+  { name: 'I36', rating: 2 },
+  { name: 'I37', rating: 2 },
+  { name: 'I38', rating: 2 },
+  { name: 'I39', rating: 2 },
+  { name: 'I40', rating: 2 },
+  { name: 'I41', rating: 2 },
+  { name: 'I42', rating: 2 },
+  { name: 'I43', rating: 2 },
+  { name: 'I44', rating: 2 },
+  { name: 'I45', rating: 2 },
+  { name: 'I46', rating: 2 },
+  { name: 'J00', rating: 2 },
+  { name: 'J01', rating: 2 },
+  { name: 'J02', rating: 2 },
+  { name: 'J03', rating: 2 },
+  { name: 'J04', rating: 2 },
+  { name: 'J05', rating: 2 },
+  { name: 'J06', rating: 2 },
+  { name: 'J07', rating: 2 },
+  { name: 'J08', rating: 2 },
+  { name: 'J09', rating: 2 },
+  { name: 'J10', rating: 2 },
+  { name: 'J11', rating: 2 },
+  { name: 'J12', rating: 2 },
+  { name: 'J13', rating: 2 },
+  { name: 'J14', rating: 2 },
+  { name: 'J15', rating: 2 },
+  { name: 'J16', rating: 2 },
+  { name: 'J17', rating: 2 },
+  { name: 'J18', rating: 2 },
+  { name: 'J19', rating: 2 },
+  { name: 'J20', rating: 2 },
+  { name: 'J21', rating: 2 },
+  { name: 'J22', rating: 2 },
+  { name: 'J23', rating: 2 },
+  { name: 'J24', rating: 2 },
+  { name: 'J25', rating: 2 },
+  { name: 'J26', rating: 2 },
+  { name: 'J27', rating: 2 },
+  { name: 'J28', rating: 2 },
+  { name: 'J29', rating: 2 },
+  { name: 'J30', rating: 2 },
+  { name: 'J31', rating: 2 },
+  { name: 'J32', rating: 2 },
+  { name: 'J33', rating: 2 },
+  { name: 'J34', rating: 2 },
+  { name: 'J35', rating: 2 },
+  { name: 'J36', rating: 2 },
+  { name: 'J37', rating: 2 },
+  { name: 'J38', rating: 2 },
+  { name: 'J39', rating: 2 },
+  { name: 'J40', rating: 2 },
+  { name: 'J41', rating: 2 },
+  { name: 'J42', rating: 2 },
+  { name: 'J43', rating: 2 },
+  { name: 'J44', rating: 2 },
+  { name: 'J45', rating: 2 },
+  { name: 'J46', rating: 2 },
+  { name: 'K00', rating: 2 },
+  { name: 'K01', rating: 2 },
+  { name: 'K02', rating: 2 },
+  { name: 'K03', rating: 2 },
+  { name: 'K04', rating: 2 },
+  { name: 'K05', rating: 2 },
+  { name: 'K06', rating: 2 },
+  { name: 'K07', rating: 2 },
+  { name: 'K08', rating: 2 },
+  { name: 'K09', rating: 2 },
+  { name: 'K10', rating: 2 },
+  { name: 'K11', rating: 2 },
+  { name: 'K12', rating: 2 },
+  { name: 'K13', rating: 2 },
+  { name: 'K14', rating: 2 },
+  { name: 'K15', rating: 2 },
+  { name: 'K16', rating: 2 },
+  { name: 'K17', rating: 2 },
+  { name: 'K18', rating: 2 },
+  { name: 'K19', rating: 2 },
+  { name: 'K20', rating: 2 },
+  { name: 'K21', rating: 2 },
+  { name: 'K22', rating: 2 },
+  { name: 'K23', rating: 2 },
+  { name: 'K24', rating: 2 },
+  { name: 'K25', rating: 2 },
+  { name: 'K26', rating: 2 },
+  { name: 'K27', rating: 2 },
+  { name: 'K28', rating: 2 },
+  { name: 'K29', rating: 2 },
+  { name: 'K30', rating: 2 },
+  { name: 'K31', rating: 2 },
+  { name: 'K32', rating: 2 },
+  { name: 'K33', rating: 2 },
+  { name: 'K34', rating: 2 },
+  { name: 'K35', rating: 2 },
+  { name: 'K36', rating: 2 },
+  { name: 'K37', rating: 2 },
+  { name: 'K38', rating: 2 },
+  { name: 'K39', rating: 2 },
+  { name: 'K40', rating: 2 },
+  { name: 'K41', rating: 2 },
+  { name: 'K42', rating: 2 },
+];
+assert.sameValue(array.length, 513);
+
+// Sort the elements by `rating` in descending order.
+// (This updates `array` in place.)
+array.sort((a, b) => b.rating - a.rating);
+
+const reduced = array.reduce((acc, element) => {
+  const letter = element.name.slice(0, 1);
+  const previousLetter = acc.slice(-1);
+  if (previousLetter === letter) {
+    return acc;
+  }
+  return acc + letter;
+}, '');
+assert.sameValue(reduced, 'DGBEFHACIJK');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/splice/15.4.4.12-9-a-1.js b/js/src/tests/test262/built-ins/Array/prototype/splice/15.4.4.12-9-a-1.js
new file mode 100644
index 0000000000..665fd57771
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/splice/15.4.4.12-9-a-1.js
@@ -0,0 +1,17 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.splice
+description: >
+    Array.prototype.splice - 'from' is the result of
+    ToString(actualStart+k) in an Array
+---*/
+
+var arrObj = [1, 2, 3];
+var newArrObj = arrObj.splice(-2, 1);
+
+assert.sameValue(newArrObj.length, 1, 'newArrObj.length');
+assert.sameValue(newArrObj[0], 2, 'newArrObj[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/splice/15.4.4.12-9-c-ii-1.js b/js/src/tests/test262/built-ins/Array/prototype/splice/15.4.4.12-9-c-ii-1.js
new file mode 100644
index 0000000000..5323c13cfc
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/splice/15.4.4.12-9-c-ii-1.js
@@ -0,0 +1,40 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.splice
+description: >
+    Array.prototype.splice will splice an array even when
+    Array.prototype has index '0' set to read-only and 'fromPresent'
+    less than 'actualDeleteCount (Step 9.c.ii)
+---*/
+
+var arr = ["a", "b", "c"];
+Array.prototype[0] = "test";
+var newArr = arr.splice(2, 1, "d");
+
+var verifyValue = false;
+verifyValue = arr.length === 3 && arr[0] === "a" && arr[1] === "b" && arr[2] === "d" &&
+  newArr[0] === "c" && newArr.length === 1;
+
+var verifyEnumerable = false;
+for (var p in newArr) {
+  if (newArr.hasOwnProperty("0") && p === "0") {
+    verifyEnumerable = true;
+  }
+}
+
+var verifyWritable = false;
+newArr[0] = 12;
+verifyWritable = newArr[0] === 12;
+
+var verifyConfigurable = false;
+delete newArr[0];
+verifyConfigurable = newArr.hasOwnProperty("0");
+
+assert(verifyValue, 'verifyValue !== true');
+assert.sameValue(verifyConfigurable, false, 'verifyConfigurable');
+assert(verifyEnumerable, 'verifyEnumerable !== true');
+assert(verifyWritable, 'verifyWritable !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A1.1_T1.js b/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A1.1_T1.js
new file mode 100644
index 0000000000..fc6c0a0eb0
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A1.1_T1.js
@@ -0,0 +1,44 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    If start is positive, use min(start, length).
+    If deleteCount is positive, use min(deleteCount, length - start)
+esid: sec-array.prototype.splice
+description: length > deleteCount > start = 0, itemCount = 0
+---*/
+
+var x = [0, 1, 2, 3];
+var arr = x.splice(0, 3);
+
+arr.getClass = Object.prototype.toString;
+if (arr.getClass() !== "[object " + "Array" + "]") {
+  throw new Test262Error('#1: var x = [0,1,2,3]; var arr = x.splice(0,3); arr is Array object. Actual: ' + (arr.getClass()));
+}
+
+if (arr.length !== 3) {
+  throw new Test262Error('#2: var x = [0,1,2,3]; var arr = x.splice(0,3); arr.length === 3. Actual: ' + (arr.length));
+}
+
+if (arr[0] !== 0) {
+  throw new Test262Error('#3: var x = [0,1,2,3]; var arr = x.splice(0,3); arr[0] === 0. Actual: ' + (arr[0]));
+}
+
+if (arr[1] !== 1) {
+  throw new Test262Error('#4: var x = [0,1,2,3]; var arr = x.splice(0,3); arr[1] === 1. Actual: ' + (arr[1]));
+}
+
+if (arr[2] !== 2) {
+  throw new Test262Error('#5: var x = [0,1,2,3]; var arr = x.splice(0,3); arr[2] === 2. Actual: ' + (arr[2]));
+}
+
+if (x.length !== 1) {
+  throw new Test262Error('#6: var x = [0,1,2,3]; var arr = x.splice(0,3); x.length === 1. Actual: ' + (x.length));
+}
+
+if (x[0] !== 3) {
+  throw new Test262Error('#7: var x = [0,1,2,3]; var arr = x.splice(0,3); x[0] === 3. Actual: ' + (x[0]));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A1.1_T2.js b/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A1.1_T2.js
new file mode 100644
index 0000000000..acab980a90
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A1.1_T2.js
@@ -0,0 +1,52 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    If start is positive, use min(start, length).
+    If deleteCount is positive, use min(deleteCount, length - start)
+esid: sec-array.prototype.splice
+description: length > deleteCount > start = 0, itemCount > 0
+---*/
+
+var x = [0, 1, 2, 3];
+var arr = x.splice(0, 3, 4, 5);
+
+arr.getClass = Object.prototype.toString;
+if (arr.getClass() !== "[object " + "Array" + "]") {
+  throw new Test262Error('#1: var x = [0,1,2,3]; var arr = x.splice(0,3,4,5); arr is Array object. Actual: ' + (arr.getClass()));
+}
+
+if (arr.length !== 3) {
+  throw new Test262Error('#2: var x = [0,1,2,3]; var arr = x.splice(0,3,4,5); arr.length === 3. Actual: ' + (arr.length));
+}
+
+if (arr[0] !== 0) {
+  throw new Test262Error('#3: var x = [0,1,2,3]; var arr = x.splice(0,3,4,5); arr[0] === 0. Actual: ' + (arr[0]));
+}
+
+if (arr[1] !== 1) {
+  throw new Test262Error('#4: var x = [0,1,2,3]; var arr = x.splice(0,3,4,5); arr[1] === 1. Actual: ' + (arr[1]));
+}
+
+if (arr[2] !== 2) {
+  throw new Test262Error('#5: var x = [0,1,2,3]; var arr = x.splice(0,3,4,5); arr[2] === 2. Actual: ' + (arr[2]));
+}
+
+if (x.length !== 3) {
+  throw new Test262Error('#6: var x = [0,1,2,3]; var arr = x.splice(0,3,4,5); x.length === 3. Actual: ' + (x.length));
+}
+
+if (x[0] !== 4) {
+  throw new Test262Error('#7: var x = [0,1,2,3]; var arr = x.splice(0,3,4,5); x[0] === 4. Actual: ' + (x[0]));
+}
+
+if (x[1] !== 5) {
+  throw new Test262Error('#8: var x = [0,1,2,3]; var arr = x.splice(0,3,4,5); x[1] === 5. Actual: ' + (x[1]));
+}
+
+if (x[2] !== 3) {
+  throw new Test262Error('#9: var x = [0,1,2,3]; var arr = x.splice(0,3,4,5); x[2] === 3. Actual: ' + (x[2]));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A1.1_T3.js b/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A1.1_T3.js
new file mode 100644
index 0000000000..a69ab334f1
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A1.1_T3.js
@@ -0,0 +1,44 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    If start is positive, use min(start, length).
+    If deleteCount is positive, use min(deleteCount, length - start)
+esid: sec-array.prototype.splice
+description: length = deleteCount > start = 0
+---*/
+
+var x = [0, 1, 2, 3];
+var arr = x.splice(0, 4);
+
+arr.getClass = Object.prototype.toString;
+if (arr.getClass() !== "[object " + "Array" + "]") {
+  throw new Test262Error('#1: var x = [0,1,2,3]; var arr = x.splice(0,4); arr is Array object. Actual: ' + (arr.getClass()));
+}
+
+if (arr.length !== 4) {
+  throw new Test262Error('#2: var x = [0,1,2,3]; var arr = x.splice(0,4); arr.length === 4. Actual: ' + (arr.length));
+}
+
+if (arr[0] !== 0) {
+  throw new Test262Error('#3: var x = [0,1,2,3]; var arr = x.splice(0,4); arr[0] === 0. Actual: ' + (arr[0]));
+}
+
+if (arr[1] !== 1) {
+  throw new Test262Error('#4: var x = [0,1,2,3]; var arr = x.splice(0,4); arr[1] === 1. Actual: ' + (arr[1]));
+}
+
+if (arr[2] !== 2) {
+  throw new Test262Error('#5: var x = [0,1,2,3]; var arr = x.splice(0,4); arr[2] === 2. Actual: ' + (arr[2]));
+}
+
+if (arr[3] !== 3) {
+  throw new Test262Error('#6: var x = [0,1,2,3]; var arr = x.splice(0,4); arr[3] === 3. Actual: ' + (arr[3]));
+}
+
+if (x.length !== 0) {
+  throw new Test262Error('#7: var x = [0,1,2,3]; var arr = x.splice(0,4); x.length === 0. Actual: ' + (x.length));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A1.1_T4.js b/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A1.1_T4.js
new file mode 100644
index 0000000000..760b4cb0d1
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A1.1_T4.js
@@ -0,0 +1,52 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    If start is positive, use min(start, length).
+    If deleteCount is positive, use min(deleteCount, length - start)
+esid: sec-array.prototype.splice
+description: length > deleteCount > start > 0, itemCount > 0
+---*/
+
+var x = [0, 1, 2, 3];
+var arr = x.splice(1, 3, 4, 5);
+
+arr.getClass = Object.prototype.toString;
+if (arr.getClass() !== "[object " + "Array" + "]") {
+  throw new Test262Error('#1: var x = [0,1,2,3]; var arr = x.splice(1,3,4,5); arr is Array object. Actual: ' + (arr.getClass()));
+}
+
+if (arr.length !== 3) {
+  throw new Test262Error('#2: var x = [0,1,2,3]; var arr = x.splice(1,3,4,5); arr.length === 3. Actual: ' + (arr.length));
+}
+
+if (arr[0] !== 1) {
+  throw new Test262Error('#3: var x = [0,1,2,3]; var arr = x.splice(1,3,4,5); arr[0] === 1. Actual: ' + (arr[0]));
+}
+
+if (arr[1] !== 2) {
+  throw new Test262Error('#4: var x = [0,1,2,3]; var arr = x.splice(1,3,4,5); arr[1] === 2. Actual: ' + (arr[1]));
+}
+
+if (arr[2] !== 3) {
+  throw new Test262Error('#5: var x = [0,1,2,3]; var arr = x.splice(1,3,4,5); arr[2] === 3. Actual: ' + (arr[2]));
+}
+
+if (x.length !== 3) {
+  throw new Test262Error('#6: var x = [0,1,2,3]; var arr = x.splice(1,3,4,5); x.length === 3. Actual: ' + (x.length));
+}
+
+if (x[0] !== 0) {
+  throw new Test262Error('#7: var x = [0,1,2,3]; var arr = x.splice(1,3,4,5); x[0] === 0. Actual: ' + (x[0]));
+}
+
+if (x[1] !== 4) {
+  throw new Test262Error('#8: var x = [0,1,2,3]; var arr = x.splice(1,3,4,5); x[1] === 4. Actual: ' + (x[1]));
+}
+
+if (x[2] !== 5) {
+  throw new Test262Error('#9: var x = [0,1,2,3]; var arr = x.splice(1,3,4,5); x[2] === 5. Actual: ' + (x[2]));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A1.1_T5.js b/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A1.1_T5.js
new file mode 100644
index 0000000000..0d21453024
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A1.1_T5.js
@@ -0,0 +1,44 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    If start is positive, use min(start, length).
+    If deleteCount is positive, use min(deleteCount, length - start)
+esid: sec-array.prototype.splice
+description: deleteCount > length > start = 0, itemCount = 0
+---*/
+
+var x = [0, 1, 2, 3];
+var arr = x.splice(0, 5);
+
+arr.getClass = Object.prototype.toString;
+if (arr.getClass() !== "[object " + "Array" + "]") {
+  throw new Test262Error('#1: var x = [0,1,2,3]; var arr = x.splice(0,5); arr is Array object. Actual: ' + (arr.getClass()));
+}
+
+if (arr.length !== 4) {
+  throw new Test262Error('#2: var x = [0,1,2,3]; var arr = x.splice(0,5); arr.length === 4. Actual: ' + (arr.length));
+}
+
+if (arr[0] !== 0) {
+  throw new Test262Error('#3: var x = [0,1,2,3]; var arr = x.splice(0,5); arr[0] === 0. Actual: ' + (arr[0]));
+}
+
+if (arr[1] !== 1) {
+  throw new Test262Error('#4: var x = [0,1,2,3]; var arr = x.splice(0,5); arr[1] === 1. Actual: ' + (arr[1]));
+}
+
+if (arr[2] !== 2) {
+  throw new Test262Error('#5: var x = [0,1,2,3]; var arr = x.splice(0,5); arr[2] === 2. Actual: ' + (arr[2]));
+}
+
+if (arr[3] !== 3) {
+  throw new Test262Error('#6: var x = [0,1,2,3]; var arr = x.splice(0,5); arr[3] === 3. Actual: ' + (arr[3]));
+}
+
+if (x.length !== 0) {
+  throw new Test262Error('#7: var x = [0,1,2,3]; var arr = x.splice(0,5); x.length === 0. Actual: ' + (x.length));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A1.1_T6.js b/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A1.1_T6.js
new file mode 100644
index 0000000000..3daeb79c61
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A1.1_T6.js
@@ -0,0 +1,52 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    If start is positive, use min(start, length).
+    If deleteCount is positive, use min(deleteCount, length - start)
+esid: sec-array.prototype.splice
+description: length = deleteCount > start > 0, itemCount > 0
+---*/
+
+var x = [0, 1, 2, 3];
+var arr = x.splice(1, 4, 4, 5);
+
+arr.getClass = Object.prototype.toString;
+if (arr.getClass() !== "[object " + "Array" + "]") {
+  throw new Test262Error('#1: var x = [0,1,2,3]; var arr = x.splice(1,4,4,5); arr is Array object. Actual: ' + (arr.getClass()));
+}
+
+if (arr.length !== 3) {
+  throw new Test262Error('#2: var x = [0,1,2,3]; var arr = x.splice(1,4,4,5); arr.length === 3. Actual: ' + (arr.length));
+}
+
+if (arr[0] !== 1) {
+  throw new Test262Error('#3: var x = [0,1,2,3]; var arr = x.splice(1,4,4,5); arr[0] === 1. Actual: ' + (arr[0]));
+}
+
+if (arr[1] !== 2) {
+  throw new Test262Error('#4: var x = [0,1,2,3]; var arr = x.splice(1,4,4,5); arr[1] === 2. Actual: ' + (arr[1]));
+}
+
+if (arr[2] !== 3) {
+  throw new Test262Error('#5: var x = [0,1,2,3]; var arr = x.splice(1,4,4,5); arr[2] === 3. Actual: ' + (arr[2]));
+}
+
+if (x.length !== 3) {
+  throw new Test262Error('#6: var x = [0,1,2,3]; var arr = x.splice(1,4,4,5); x.length === 3. Actual: ' + (x.length));
+}
+
+if (x[0] !== 0) {
+  throw new Test262Error('#7: var x = [0,1,2,3]; var arr = x.splice(1,4,4,5); x[0] === 0. Actual: ' + (x[0]));
+}
+
+if (x[1] !== 4) {
+  throw new Test262Error('#8: var x = [0,1,2,3]; var arr = x.splice(1,4,4,5); x[1] === 4. Actual: ' + (x[1]));
+}
+
+if (x[2] !== 5) {
+  throw new Test262Error('#9: var x = [0,1,2,3]; var arr = x.splice(1,4,4,5); x[2] === 5. Actual: ' + (x[2]));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A1.2_T1.js b/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A1.2_T1.js
new file mode 100644
index 0000000000..fae73a4f34
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A1.2_T1.js
@@ -0,0 +1,36 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    If start is negative, use max(start + length, 0).
+    If deleteCount is negative, use 0
+esid: sec-array.prototype.splice
+description: -length = start < deleteCount < 0, itemCount = 0
+---*/
+
+var x = [0, 1];
+var arr = x.splice(-2, -1);
+
+arr.getClass = Object.prototype.toString;
+if (arr.getClass() !== "[object " + "Array" + "]") {
+  throw new Test262Error('#0: var x = [0,1]; var arr = x.splice(-2,-1); arr is Array object. Actual: ' + (arr.getClass()));
+}
+
+if (arr.length !== 0) {
+  throw new Test262Error('#1: var x = [0,1]; var arr = x.splice(-2,-1); arr.length === 0. Actual: ' + (arr.length));
+}
+
+if (x.length !== 2) {
+  throw new Test262Error('#2: var x = [0,1]; var arr = x.splice(-2,-1); x.length === 2. Actual: ' + (x.length));
+}
+
+if (x[0] !== 0) {
+  throw new Test262Error('#3: var x = [0,1]; var arr = x.splice(-2,-1); x[0] === 0. Actual: ' + (x[0]));
+}
+
+if (x[1] !== 1) {
+  throw new Test262Error('#4: var x = [0,1]; var arr = x.splice(-2,-1); x[1] === 1. Actual: ' + (x[1]));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A1.2_T2.js b/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A1.2_T2.js
new file mode 100644
index 0000000000..a9f5127015
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A1.2_T2.js
@@ -0,0 +1,36 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    If start is negative, use max(start + length, 0).
+    If deleteCount is negative, use 0
+esid: sec-array.prototype.splice
+description: -length < start = deleteCount < 0, itemCount = 0
+---*/
+
+var x = [0, 1];
+var arr = x.splice(-1, -1);
+
+arr.getClass = Object.prototype.toString;
+if (arr.getClass() !== "[object " + "Array" + "]") {
+  throw new Test262Error('#0: var x = [0,1]; var arr = x.splice(-1,-1); arr is Array object. Actual: ' + (arr.getClass()));
+}
+
+if (arr.length !== 0) {
+  throw new Test262Error('#1: var x = [0,1]; var arr = x.splice(-1,-1); arr.length === 0. Actual: ' + (arr.length));
+}
+
+if (x.length !== 2) {
+  throw new Test262Error('#2: var x = [0,1]; var arr = x.splice(-1,-1); x.length === 2. Actual: ' + (x.length));
+}
+
+if (x[0] !== 0) {
+  throw new Test262Error('#3: var x = [0,1]; var arr = x.splice(-1,-1); x[0] === 0. Actual: ' + (x[0]));
+}
+
+if (x[1] !== 1) {
+  throw new Test262Error('#4: var x = [0,1]; var arr = x.splice(-1,-1); x[1] === 1. Actual: ' + (x[1]));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A1.2_T3.js b/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A1.2_T3.js
new file mode 100644
index 0000000000..6b8d6f5bfd
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A1.2_T3.js
@@ -0,0 +1,44 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    If start is negative, use max(start + length, 0).
+    If deleteCount is negative, use 0
+esid: sec-array.prototype.splice
+description: -length = start < deleteCount < 0, itemCount > 0
+---*/
+
+var x = [0, 1];
+var arr = x.splice(-2, -1, 2, 3);
+
+arr.getClass = Object.prototype.toString;
+if (arr.getClass() !== "[object " + "Array" + "]") {
+  throw new Test262Error('#0: var x = [0,1]; var arr = x.splice(-2,-1,2,3); arr is Array object. Actual: ' + (arr.getClass()));
+}
+
+if (arr.length !== 0) {
+  throw new Test262Error('#1: var x = [0,1]; var arr = x.splice(-2,-1,2,3); arr.length === 0. Actual: ' + (arr.length));
+}
+
+if (x.length !== 4) {
+  throw new Test262Error('#2: var x = [0,1]; var arr = x.splice(-2,-1,2,3); x.length === 4. Actual: ' + (x.length));
+}
+
+if (x[0] !== 2) {
+  throw new Test262Error('#3: var x = [0,1]; var arr = x.splice(-2,-1,2,3); x[0] === 2. Actual: ' + (x[0]));
+}
+
+if (x[1] !== 3) {
+  throw new Test262Error('#4: var x = [0,1]; var arr = x.splice(-2,-1,2,3); x[1] === 3. Actual: ' + (x[1]));
+}
+
+if (x[2] !== 0) {
+  throw new Test262Error('#5: var x = [0,1]; var arr = x.splice(-2,-1,2,3); x[2] === 0. Actual: ' + (x[2]));
+}
+
+if (x[3] !== 1) {
+  throw new Test262Error('#6: var x = [0,1]; var arr = x.splice(-2,-1,2,3); x[3] === 1. Actual: ' + (x[3]));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A1.2_T4.js b/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A1.2_T4.js
new file mode 100644
index 0000000000..e3be864ac8
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A1.2_T4.js
@@ -0,0 +1,44 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    If start is negative, use max(start + length, 0).
+    If deleteCount is negative, use 0
+esid: sec-array.prototype.splice
+description: -length < start = deleteCount < 0, itemCount > 0
+---*/
+
+var x = [0, 1];
+var arr = x.splice(-1, -1, 2, 3);
+
+arr.getClass = Object.prototype.toString;
+if (arr.getClass() !== "[object " + "Array" + "]") {
+  throw new Test262Error('#0: var x = [0,1]; var arr = x.splice(-1,-1,2,3); arr is Array object. Actual: ' + (arr.getClass()));
+}
+
+if (arr.length !== 0) {
+  throw new Test262Error('#1: var x = [0,1]; var arr = x.splice(-1,-1,2,3); arr.length === 0. Actual: ' + (arr.length));
+}
+
+if (x.length !== 4) {
+  throw new Test262Error('#2: var x = [0,1]; var arr = x.splice(-1,-1,2,3); x.length === 4. Actual: ' + (x.length));
+}
+
+if (x[0] !== 0) {
+  throw new Test262Error('#3: var x = [0,1]; var arr = x.splice(-1,-1,2,3); x[0] === 0. Actual: ' + (x[0]));
+}
+
+if (x[1] !== 2) {
+  throw new Test262Error('#4: var x = [0,1]; var arr = x.splice(-1,-1,2,3); x[1] === 2. Actual: ' + (x[1]));
+}
+
+if (x[2] !== 3) {
+  throw new Test262Error('#5: var x = [0,1]; var arr = x.splice(-1,-1,2,3); x[2] === 3. Actual: ' + (x[2]));
+}
+
+if (x[3] !== 1) {
+  throw new Test262Error('#6: var x = [0,1]; var arr = x.splice(-1,-1,2,3); x[3] === 1. Actual: ' + (x[3]));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A1.2_T5.js b/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A1.2_T5.js
new file mode 100644
index 0000000000..e1e0b56e32
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A1.2_T5.js
@@ -0,0 +1,44 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    If start is negative, use max(start + length, 0).
+    If deleteCount is negative, use 0
+esid: sec-array.prototype.splice
+description: start < -length < deleteCount < 0, itemCount > 0
+---*/
+
+var x = [0, 1];
+var arr = x.splice(-3, -1, 2, 3);
+
+arr.getClass = Object.prototype.toString;
+if (arr.getClass() !== "[object " + "Array" + "]") {
+  throw new Test262Error('#0: var x = [0,1]; var arr = x.splice(-3,-1,2,3); arr is Array object. Actual: ' + (arr.getClass()));
+}
+
+if (arr.length !== 0) {
+  throw new Test262Error('#1: var x = [0,1]; var arr = x.splice(-3,-1,2,3); arr.length === 0. Actual: ' + (arr.length));
+}
+
+if (x.length !== 4) {
+  throw new Test262Error('#2: var x = [0,1]; var arr = x.splice(-3,-1,2,3); x.length === 4. Actual: ' + (x.length));
+}
+
+if (x[0] !== 2) {
+  throw new Test262Error('#3: var x = [0,1]; var arr = x.splice(-3,-1,2,3); x[0] === 2. Actual: ' + (x[0]));
+}
+
+if (x[1] !== 3) {
+  throw new Test262Error('#4: var x = [0,1]; var arr = x.splice(-3,-1,2,3); x[1] === 3. Actual: ' + (x[1]));
+}
+
+if (x[2] !== 0) {
+  throw new Test262Error('#5: var x = [0,1]; var arr = x.splice(-3,-1,2,3); x[2] === 0. Actual: ' + (x[2]));
+}
+
+if (x[3] !== 1) {
+  throw new Test262Error('#6: var x = [0,1]; var arr = x.splice(-3,-1,2,3); x[3] === 1. Actual: ' + (x[3]));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A1.3_T1.js b/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A1.3_T1.js
new file mode 100644
index 0000000000..5183980022
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A1.3_T1.js
@@ -0,0 +1,36 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    If start is positive, use min(start, length).
+    If deleteCount is negative, use 0
+esid: sec-array.prototype.splice
+description: -length < deleteCount < start = 0, itemCount = 0
+---*/
+
+var x = [0, 1];
+var arr = x.splice(0, -1);
+
+arr.getClass = Object.prototype.toString;
+if (arr.getClass() !== "[object " + "Array" + "]") {
+  throw new Test262Error('#0: var x = [0,1]; var arr = x.splice(0,-1); arr is Array object. Actual: ' + (arr.getClass()));
+}
+
+if (arr.length !== 0) {
+  throw new Test262Error('#1: var x = [0,1]; var arr = x.splice(0,-1); arr.length === 0. Actual: ' + (arr.length));
+}
+
+if (x.length !== 2) {
+  throw new Test262Error('#2: var x = [0,1]; var arr = x.splice(0,-1); x.length === 2. Actual: ' + (x.length));
+}
+
+if (x[0] !== 0) {
+  throw new Test262Error('#3: var x = [0,1]; var arr = x.splice(0,-1); x[0] === 0. Actual: ' + (x[0]));
+}
+
+if (x[1] !== 1) {
+  throw new Test262Error('#4: var x = [0,1]; var arr = x.splice(0,-1); x[1] === 1. Actual: ' + (x[1]));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A1.3_T2.js b/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A1.3_T2.js
new file mode 100644
index 0000000000..4d85c4b251
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A1.3_T2.js
@@ -0,0 +1,36 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    If start is positive, use min(start, length).
+    If deleteCount is negative, use 0
+esid: sec-array.prototype.splice
+description: -length = -start < deleteCount < 0, itemCount = 0
+---*/
+
+var x = [0, 1];
+var arr = x.splice(2, -1);
+
+arr.getClass = Object.prototype.toString;
+if (arr.getClass() !== "[object " + "Array" + "]") {
+  throw new Test262Error('#0: var x = [0,1]; var arr = x.splice(2,-1); arr is Array object. Actual: ' + (arr.getClass()));
+}
+
+if (arr.length !== 0) {
+  throw new Test262Error('#1: var x = [0,1]; var arr = x.splice(2,-1); arr.length === 0. Actual: ' + (arr.length));
+}
+
+if (x.length !== 2) {
+  throw new Test262Error('#2: var x = [0,1]; var arr = x.splice(2,-1); x.length === 2. Actual: ' + (x.length));
+}
+
+if (x[0] !== 0) {
+  throw new Test262Error('#3: var x = [0,1]; var arr = x.splice(2,-1); x[0] === 0. Actual: ' + (x[0]));
+}
+
+if (x[1] !== 1) {
+  throw new Test262Error('#4: var x = [0,1]; var arr = x.splice(2,-1); x[1] === 1. Actual: ' + (x[1]));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A1.3_T3.js b/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A1.3_T3.js
new file mode 100644
index 0000000000..627753cd24
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A1.3_T3.js
@@ -0,0 +1,44 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    If start is positive, use min(start, length).
+    If deleteCount is negative, use 0
+esid: sec-array.prototype.splice
+description: -length < deleteCount < start = 0, itemCount > 0
+---*/
+
+var x = [0, 1];
+var arr = x.splice(0, -1, 2, 3);
+
+arr.getClass = Object.prototype.toString;
+if (arr.getClass() !== "[object " + "Array" + "]") {
+  throw new Test262Error('#0: var x = [0,1]; var arr = x.splice(0,-1,2,3); arr is Array object. Actual: ' + (arr.getClass()));
+}
+
+if (arr.length !== 0) {
+  throw new Test262Error('#1: var x = [0,1]; var arr = x.splice(0,-1,2,3); arr.length === 0. Actual: ' + (arr.length));
+}
+
+if (x.length !== 4) {
+  throw new Test262Error('#2: var x = [0,1]; var arr = x.splice(0,-1,2,3); x.length === 4. Actual: ' + (x.length));
+}
+
+if (x[0] !== 2) {
+  throw new Test262Error('#3: var x = [0,1]; var arr = x.splice(0,-1,2,3); x[0] === 2. Actual: ' + (x[0]));
+}
+
+if (x[1] !== 3) {
+  throw new Test262Error('#4: var x = [0,1]; var arr = x.splice(0,-1,2,3); x[1] === 3. Actual: ' + (x[1]));
+}
+
+if (x[2] !== 0) {
+  throw new Test262Error('#5: var x = [0,1]; var arr = x.splice(0,-1,2,3); x[2] === 0. Actual: ' + (x[2]));
+}
+
+if (x[3] !== 1) {
+  throw new Test262Error('#6: var x = [0,1]; var arr = x.splice(0,-1,2,3); x[3] === 1. Actual: ' + (x[3]));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A1.3_T4.js b/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A1.3_T4.js
new file mode 100644
index 0000000000..83e32eabad
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A1.3_T4.js
@@ -0,0 +1,44 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    If start is positive, use min(start, length).
+    If deleteCount is negative, use 0
+esid: sec-array.prototype.splice
+description: -length = -start < deleteCount < 0, itemCount > 0
+---*/
+
+var x = [0, 1];
+var arr = x.splice(2, -1, 2, 3);
+
+arr.getClass = Object.prototype.toString;
+if (arr.getClass() !== "[object " + "Array" + "]") {
+  throw new Test262Error('#0: var x = [0,1]; var arr = x.splice(2,-1,2,3); arr is Array object. Actual: ' + (arr.getClass()));
+}
+
+if (arr.length !== 0) {
+  throw new Test262Error('#1: var x = [0,1]; var arr = x.splice(2,-1,2,3); arr.length === 0. Actual: ' + (arr.length));
+}
+
+if (x.length !== 4) {
+  throw new Test262Error('#2: var x = [0,1]; var arr = x.splice(2,-1,2,3); x.length === 4. Actual: ' + (x.length));
+}
+
+if (x[0] !== 0) {
+  throw new Test262Error('#3: var x = [0,1]; var arr = x.splice(2,-1,2,3); x[0] === 0. Actual: ' + (x[0]));
+}
+
+if (x[1] !== 1) {
+  throw new Test262Error('#4: var x = [0,1]; var arr = x.splice(2,-1,2,3); x[1] === 1. Actual: ' + (x[1]));
+}
+
+if (x[2] !== 2) {
+  throw new Test262Error('#5: var x = [0,1]; var arr = x.splice(2,-1,2,3); x[2] === 2. Actual: ' + (x[2]));
+}
+
+if (x[3] !== 3) {
+  throw new Test262Error('#6: var x = [0,1]; var arr = x.splice(2,-1,2,3); x[3] === 3. Actual: ' + (x[3]));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A1.3_T5.js b/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A1.3_T5.js
new file mode 100644
index 0000000000..8e9c337f19
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A1.3_T5.js
@@ -0,0 +1,44 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    If start is positive, use min(start, length).
+    If deleteCount is negative, use 0
+esid: sec-array.prototype.splice
+description: -start < -length < deleteCount < 0, itemCount > 0
+---*/
+
+var x = [0, 1];
+var arr = x.splice(3, -1, 2, 3);
+
+arr.getClass = Object.prototype.toString;
+if (arr.getClass() !== "[object " + "Array" + "]") {
+  throw new Test262Error('#0: var x = [0,1]; var arr = x.splice(3,-1,2,3); arr is Array object. Actual: ' + (arr.getClass()));
+}
+
+if (arr.length !== 0) {
+  throw new Test262Error('#1: var x = [0,1]; var arr = x.splice(3,-1,2,3); arr.length === 0. Actual: ' + (arr.length));
+}
+
+if (x.length !== 4) {
+  throw new Test262Error('#2: var x = [0,1]; var arr = x.splice(3,-1,2,3); x.length === 4. Actual: ' + (x.length));
+}
+
+if (x[0] !== 0) {
+  throw new Test262Error('#3: var x = [0,1]; var arr = x.splice(3,-1,2,3); x[0] === 0. Actual: ' + (x[0]));
+}
+
+if (x[1] !== 1) {
+  throw new Test262Error('#4: var x = [0,1]; var arr = x.splice(3,-1,2,3); x[1] === 1. Actual: ' + (x[1]));
+}
+
+if (x[2] !== 2) {
+  throw new Test262Error('#5: var x = [0,1]; var arr = x.splice(3,-1,2,3); x[2] === 2. Actual: ' + (x[2]));
+}
+
+if (x[3] !== 3) {
+  throw new Test262Error('#6: var x = [0,1]; var arr = x.splice(3,-1,2,3); x[3] === 3. Actual: ' + (x[3]));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A1.4_T1.js b/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A1.4_T1.js
new file mode 100644
index 0000000000..192c5d3d42
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A1.4_T1.js
@@ -0,0 +1,44 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    If start is negative, use max(start + length, 0).
+    If deleteCount is positive, use min(deleteCount, length - start)
+esid: sec-array.prototype.splice
+description: length = -start > deleteCount > 0, itemCount = 0
+---*/
+
+var x = [0, 1, 2, 3];
+var arr = x.splice(-4, 3);
+
+arr.getClass = Object.prototype.toString;
+if (arr.getClass() !== "[object " + "Array" + "]") {
+  throw new Test262Error('#1: var x = [0,1,2,3]; var arr = x.splice(-4,3); arr is Array object. Actual: ' + (arr.getClass()));
+}
+
+if (arr.length !== 3) {
+  throw new Test262Error('#2: var x = [0,1,2,3]; var arr = x.splice(-4,3); arr.length === 3. Actual: ' + (arr.length));
+}
+
+if (arr[0] !== 0) {
+  throw new Test262Error('#3: var x = [0,1,2,3]; var arr = x.splice(-4,3); arr[0] === 0. Actual: ' + (arr[0]));
+}
+
+if (arr[1] !== 1) {
+  throw new Test262Error('#4: var x = [0,1,2,3]; var arr = x.splice(-4,3); arr[1] === 1. Actual: ' + (arr[1]));
+}
+
+if (arr[2] !== 2) {
+  throw new Test262Error('#5: var x = [0,1,2,3]; var arr = x.splice(-4,3); arr[2] === 2. Actual: ' + (arr[2]));
+}
+
+if (x.length !== 1) {
+  throw new Test262Error('#6: var x = [0,1,2,3]; var arr = x.splice(-4,3); x.length === 1. Actual: ' + (x.length));
+}
+
+if (x[0] !== 3) {
+  throw new Test262Error('#7: var x = [0,1,2,3]; var arr = x.splice(-4,3); x[0] === 3. Actual: ' + (x[0]));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A1.4_T2.js b/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A1.4_T2.js
new file mode 100644
index 0000000000..2b9c02509d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A1.4_T2.js
@@ -0,0 +1,52 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    If start is negative, use max(start + length, 0).
+    If deleteCount is positive, use min(deleteCount, length - start)
+esid: sec-array.prototype.splice
+description: length = -start > deleteCount > 0, itemCount > 0
+---*/
+
+var x = [0, 1, 2, 3];
+var arr = x.splice(-4, 3, 4, 5);
+
+arr.getClass = Object.prototype.toString;
+if (arr.getClass() !== "[object " + "Array" + "]") {
+  throw new Test262Error('#1: var x = [0,1,2,3]; var arr = x.splice(-4,3,4,5); arr is Array object. Actual: ' + (arr.getClass()));
+}
+
+if (arr.length !== 3) {
+  throw new Test262Error('#2: var x = [0,1,2,3]; var arr = x.splice(-4,3,4,5); arr.length === 3. Actual: ' + (arr.length));
+}
+
+if (arr[0] !== 0) {
+  throw new Test262Error('#3: var x = [0,1,2,3]; var arr = x.splice(-4,3,4,5); arr[0] === 0. Actual: ' + (arr[0]));
+}
+
+if (arr[1] !== 1) {
+  throw new Test262Error('#4: var x = [0,1,2,3]; var arr = x.splice(-4,3,4,5); arr[1] === 1. Actual: ' + (arr[1]));
+}
+
+if (arr[2] !== 2) {
+  throw new Test262Error('#5: var x = [0,1,2,3]; var arr = x.splice(-4,3,4,5); arr[2] === 2. Actual: ' + (arr[2]));
+}
+
+if (x.length !== 3) {
+  throw new Test262Error('#6: var x = [0,1,2,3]; var arr = x.splice(-4,3,4,5); x.length === 3. Actual: ' + (x.length));
+}
+
+if (x[0] !== 4) {
+  throw new Test262Error('#7: var x = [0,1,2,3]; var arr = x.splice(-4,3,4,5); x[0] === 4. Actual: ' + (x[0]));
+}
+
+if (x[1] !== 5) {
+  throw new Test262Error('#8: var x = [0,1,2,3]; var arr = x.splice(-4,3,4,5); x[1] === 5. Actual: ' + (x[1]));
+}
+
+if (x[2] !== 3) {
+  throw new Test262Error('#9: var x = [0,1,2,3]; var arr = x.splice(-4,3,4,5); x[2] === 3. Actual: ' + (x[2]));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A1.4_T3.js b/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A1.4_T3.js
new file mode 100644
index 0000000000..61d50324c9
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A1.4_T3.js
@@ -0,0 +1,44 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    If start is negative, use max(start + length, 0).
+    If deleteCount is positive, use min(deleteCount, length - start)
+esid: sec-array.prototype.splice
+description: -start > length = deleteCount > 0, itemCount = 0
+---*/
+
+var x = [0, 1, 2, 3];
+var arr = x.splice(-5, 4);
+
+arr.getClass = Object.prototype.toString;
+if (arr.getClass() !== "[object " + "Array" + "]") {
+  throw new Test262Error('#1: var x = [0,1,2,3]; var arr = x.splice(-5,4); arr is Array object. Actual: ' + (arr.getClass()));
+}
+
+if (arr.length !== 4) {
+  throw new Test262Error('#2: var x = [0,1,2,3]; var arr = x.splice(-5,4); arr.length === 4. Actual: ' + (arr.length));
+}
+
+if (arr[0] !== 0) {
+  throw new Test262Error('#3: var x = [0,1,2,3]; var arr = x.splice(-5,4); arr[0] === 0. Actual: ' + (arr[0]));
+}
+
+if (arr[1] !== 1) {
+  throw new Test262Error('#4: var x = [0,1,2,3]; var arr = x.splice(-5,4); arr[1] === 1. Actual: ' + (arr[1]));
+}
+
+if (arr[2] !== 2) {
+  throw new Test262Error('#5: var x = [0,1,2,3]; var arr = x.splice(-5,4); arr[2] === 2. Actual: ' + (arr[2]));
+}
+
+if (arr[3] !== 3) {
+  throw new Test262Error('#6: var x = [0,1,2,3]; var arr = x.splice(-5,4); arr[3] === 3. Actual: ' + (arr[3]));
+}
+
+if (x.length !== 0) {
+  throw new Test262Error('#7: var x = [0,1,2,3]; var arr = x.splice(-5,4); x.length === 0. Actual: ' + (x.length));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A1.4_T4.js b/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A1.4_T4.js
new file mode 100644
index 0000000000..14927ad334
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A1.4_T4.js
@@ -0,0 +1,52 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    If start is negative, use max(start + length, 0).
+    If deleteCount is positive, use min(deleteCount, length - start)
+esid: sec-array.prototype.splice
+description: length > -start = deleteCount > 0, itemCount > 0
+---*/
+
+var x = [0, 1, 2, 3];
+var arr = x.splice(-3, 3, 4, 5);
+
+arr.getClass = Object.prototype.toString;
+if (arr.getClass() !== "[object " + "Array" + "]") {
+  throw new Test262Error('#1: var x = [0,1,2,3]; var arr = x.splice(-3,3,4,5); arr is Array object. Actual: ' + (arr.getClass()));
+}
+
+if (arr.length !== 3) {
+  throw new Test262Error('#2: var x = [0,1,2,3]; var arr = x.splice(-3,3,4,5); arr.length === 3. Actual: ' + (arr.length));
+}
+
+if (arr[0] !== 1) {
+  throw new Test262Error('#3: var x = [0,1,2,3]; var arr = x.splice(-3,3,4,5); arr[0] === 1. Actual: ' + (arr[0]));
+}
+
+if (arr[1] !== 2) {
+  throw new Test262Error('#4: var x = [0,1,2,3]; var arr = x.splice(-3,3,4,5); arr[1] === 2. Actual: ' + (arr[1]));
+}
+
+if (arr[2] !== 3) {
+  throw new Test262Error('#5: var x = [0,1,2,3]; var arr = x.splice(-3,3,4,5); arr[2] === 3. Actual: ' + (arr[2]));
+}
+
+if (x.length !== 3) {
+  throw new Test262Error('#6: var x = [0,1,2,3]; var arr = x.splice(-3,3,4,5); x.length === 3. Actual: ' + (x.length));
+}
+
+if (x[0] !== 0) {
+  throw new Test262Error('#7: var x = [0,1,2,3]; var arr = x.splice(-3,3,4,5); x[0] === 0. Actual: ' + (x[0]));
+}
+
+if (x[1] !== 4) {
+  throw new Test262Error('#8: var x = [0,1,2,3]; var arr = x.splice(-3,3,4,5); x[1] === 4. Actual: ' + (x[1]));
+}
+
+if (x[2] !== 5) {
+  throw new Test262Error('#9: var x = [0,1,2,3]; var arr = x.splice(-3,3,4,5); x[2] === 5. Actual: ' + (x[2]));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A1.4_T5.js b/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A1.4_T5.js
new file mode 100644
index 0000000000..1ed94192ce
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A1.4_T5.js
@@ -0,0 +1,44 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    If start is negative, use max(start + length, 0).
+    If deleteCount is positive, use min(deleteCount, length - start)
+esid: sec-array.prototype.splice
+description: -start > deleteCount > length > 0, itemCount = 0
+---*/
+
+var x = [0, 1, 2, 3];
+var arr = x.splice(-9, 5);
+
+arr.getClass = Object.prototype.toString;
+if (arr.getClass() !== "[object " + "Array" + "]") {
+  throw new Test262Error('#1: var x = [0,1,2,3]; var arr = x.splice(-9,5); arr is Array object. Actual: ' + (arr.getClass()));
+}
+
+if (arr.length !== 4) {
+  throw new Test262Error('#2: var x = [0,1,2,3]; var arr = x.splice(-9,5); arr.length === 4. Actual: ' + (arr.length));
+}
+
+if (arr[0] !== 0) {
+  throw new Test262Error('#3: var x = [0,1,2,3]; var arr = x.splice(-9,5); arr[0] === 0. Actual: ' + (arr[0]));
+}
+
+if (arr[1] !== 1) {
+  throw new Test262Error('#4: var x = [0,1,2,3]; var arr = x.splice(-9,5); arr[1] === 1. Actual: ' + (arr[1]));
+}
+
+if (arr[2] !== 2) {
+  throw new Test262Error('#5: var x = [0,1,2,3]; var arr = x.splice(-9,5); arr[2] === 2. Actual: ' + (arr[2]));
+}
+
+if (arr[3] !== 3) {
+  throw new Test262Error('#6: var x = [0,1,2,3]; var arr = x.splice(-9,5); arr[3] === 3. Actual: ' + (arr[3]));
+}
+
+if (x.length !== 0) {
+  throw new Test262Error('#7: var x = [0,1,2,3]; var arr = x.splice(-9,5); x.length === 0. Actual: ' + (x.length));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A1.4_T6.js b/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A1.4_T6.js
new file mode 100644
index 0000000000..afae2a1210
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A1.4_T6.js
@@ -0,0 +1,52 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    If start is negative, use max(start + length, 0).
+    If deleteCount is positive, use min(deleteCount, length - start)
+esid: sec-array.prototype.splice
+description: length = deleteCount > -start > 0, itemCount > 0
+---*/
+
+var x = [0, 1, 2, 3];
+var arr = x.splice(-3, 4, 4, 5);
+
+arr.getClass = Object.prototype.toString;
+if (arr.getClass() !== "[object " + "Array" + "]") {
+  throw new Test262Error('#1: var x = [0,1,2,3]; var arr = x.splice(-3,4,4,5); arr is Array object. Actual: ' + (arr.getClass()));
+}
+
+if (arr.length !== 3) {
+  throw new Test262Error('#2: var x = [0,1,2,3]; var arr = x.splice(-3,4,4,5); arr.length === 3. Actual: ' + (arr.length));
+}
+
+if (arr[0] !== 1) {
+  throw new Test262Error('#3: var x = [0,1,2,3]; var arr = x.splice(-3,4,4,5); arr[0] === 1. Actual: ' + (arr[0]));
+}
+
+if (arr[1] !== 2) {
+  throw new Test262Error('#4: var x = [0,1,2,3]; var arr = x.splice(-3,4,4,5); arr[1] === 2. Actual: ' + (arr[1]));
+}
+
+if (arr[2] !== 3) {
+  throw new Test262Error('#5: var x = [0,1,2,3]; var arr = x.splice(-3,4,4,5); arr[2] === 3. Actual: ' + (arr[2]));
+}
+
+if (x.length !== 3) {
+  throw new Test262Error('#6: var x = [0,1,2,3]; var arr = x.splice(-3,4,4,5); x.length === 3. Actual: ' + (x.length));
+}
+
+if (x[0] !== 0) {
+  throw new Test262Error('#7: var x = [0,1,2,3]; var arr = x.splice(-3,4,4,5); x[0] === 0. Actual: ' + (x[0]));
+}
+
+if (x[1] !== 4) {
+  throw new Test262Error('#8: var x = [0,1,2,3]; var arr = x.splice(-3,4,4,5); x[1] === 4. Actual: ' + (x[1]));
+}
+
+if (x[2] !== 5) {
+  throw new Test262Error('#9: var x = [0,1,2,3]; var arr = x.splice(-3,4,4,5); x[2] === 5. Actual: ' + (x[2]));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A1.5_T1.js b/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A1.5_T1.js
new file mode 100644
index 0000000000..7819ebeb2f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A1.5_T1.js
@@ -0,0 +1,42 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: Splice with undefined arguments
+esid: sec-array.prototype.splice
+description: start === undefined, end === undefined
+---*/
+
+var x = [0, 1, 2, 3];
+var arr = x.splice(undefined, undefined);
+
+arr.getClass = Object.prototype.toString;
+if (arr.getClass() !== "[object " + "Array" + "]") {
+  throw new Test262Error('#1: var x = [0,1,2,3]; var arr = x.splice(undefined, undefined); arr is Array object. Actual: ' + (arr.getClass()));
+}
+
+if (arr.length !== 0) {
+  throw new Test262Error('#2: var x = [0,1,2,3]; var arr = x.splice(undefined, undefined); arr.length === 0. Actual: ' + (arr.length));
+}
+
+if (x.length !== 4) {
+  throw new Test262Error('#3: var x = [0,1,2,3]; var arr = x.splice(undefined, undefined); x.length === 4. Actual: ' + (x.length));
+}
+
+if (x[0] !== 0) {
+  throw new Test262Error('#4: var x = [0,1,2,3]; var arr = x.splice(undefined, undefined); x[0] === 0. Actual: ' + (x[0]));
+}
+
+if (x[1] !== 1) {
+  throw new Test262Error('#5: var x = [0,1,2,3]; var arr = x.splice(undefined, undefined); x[1] === 1. Actual: ' + (x[1]));
+}
+
+if (x[2] !== 2) {
+  throw new Test262Error('#6: var x = [0,1,2,3]; var arr = x.splice(undefined, undefined); x[2] === 2. Actual: ' + (x[2]));
+}
+
+if (x[3] !== 3) {
+  throw new Test262Error('#7: var x = [0,1,2,3]; var arr = x.splice(undefined, undefined); x[3] === 3. Actual: ' + (x[3]));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A1.5_T2.js b/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A1.5_T2.js
new file mode 100644
index 0000000000..f53fab64b1
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A1.5_T2.js
@@ -0,0 +1,42 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: Splice with undefined arguments
+esid: sec-array.prototype.splice
+description: end === undefined
+---*/
+
+var x = [0, 1, 2, 3];
+var arr = x.splice(1, undefined);
+
+arr.getClass = Object.prototype.toString;
+if (arr.getClass() !== "[object " + "Array" + "]") {
+  throw new Test262Error('#1: var x = [0,1,2,3]; var arr = x.splice(1,undefined); arr is Array object. Actual: ' + (arr.getClass()));
+}
+
+if (arr.length !== 0) {
+  throw new Test262Error('#2: var x = [0,1,2,3]; var arr = x.splice(1,undefined); arr.length === 0. Actual: ' + (arr.length));
+}
+
+if (x.length !== 4) {
+  throw new Test262Error('#3: var x = [0,1,2,3]; var arr = x.splice(1,undefined); x.length === 4. Actual: ' + (x.length));
+}
+
+if (x[0] !== 0) {
+  throw new Test262Error('#4: var x = [0,1,2,3]; var arr = x.splice(1,undefined); x[0] === 0. Actual: ' + (x[0]));
+}
+
+if (x[1] !== 1) {
+  throw new Test262Error('#5: var x = [0,1,2,3]; var arr = x.splice(1,undefined); x[1] === 1. Actual: ' + (x[1]));
+}
+
+if (x[2] !== 2) {
+  throw new Test262Error('#6: var x = [0,1,2,3]; var arr = x.splice(1,undefined); x[2] === 2. Actual: ' + (x[2]));
+}
+
+if (x[3] !== 3) {
+  throw new Test262Error('#7: var x = [0,1,2,3]; var arr = x.splice(1,undefined); x[3] === 3. Actual: ' + (x[3]));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A2.1_T1.js b/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A2.1_T1.js
new file mode 100644
index 0000000000..eaab7b5b11
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A2.1_T1.js
@@ -0,0 +1,42 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: Operator use ToInteger from start
+esid: sec-array.prototype.splice
+description: start is not integer
+---*/
+
+var x = [0, 1, 2, 3];
+var arr = x.splice(1.5, 3);
+
+arr.getClass = Object.prototype.toString;
+if (arr.getClass() !== "[object " + "Array" + "]") {
+  throw new Test262Error('#1: var x = [0,1,2,3]; var arr = x.splice(1.5,3); arr is Array object. Actual: ' + (arr.getClass()));
+}
+
+if (arr.length !== 3) {
+  throw new Test262Error('#2: var x = [0,1,2,3]; var arr = x.splice(1.5,3); arr.length === 3. Actual: ' + (arr.length));
+}
+
+if (arr[0] !== 1) {
+  throw new Test262Error('#3: var x = [0,1,2,3]; var arr = x.splice(1.5,3); arr[0] === 1. Actual: ' + (arr[0]));
+}
+
+if (arr[1] !== 2) {
+  throw new Test262Error('#4: var x = [0,1,2,3]; var arr = x.splice(1.5,3); arr[1] === 2. Actual: ' + (arr[1]));
+}
+
+if (arr[2] !== 3) {
+  throw new Test262Error('#5: var x = [0,1,2,3]; var arr = x.splice(1.5,3); arr[2] === 3. Actual: ' + (arr[2]));
+}
+
+if (x.length !== 1) {
+  throw new Test262Error('#6: var x = [0,1,2,3]; var arr = x.splice(1.5,3); x.length === 1. Actual: ' + (x.length));
+}
+
+if (x[0] !== 0) {
+  throw new Test262Error('#7: var x = [0,1,2,3]; var arr = x.splice(1.5,3); x[0] === 0. Actual: ' + (x[0]));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A2.1_T2.js b/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A2.1_T2.js
new file mode 100644
index 0000000000..ad657a6c37
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A2.1_T2.js
@@ -0,0 +1,42 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: Operator use ToInteger from start
+esid: sec-array.prototype.splice
+description: start = NaN
+---*/
+
+var x = [0, 1, 2, 3];
+var arr = x.splice(NaN, 3);
+
+arr.getClass = Object.prototype.toString;
+if (arr.getClass() !== "[object " + "Array" + "]") {
+  throw new Test262Error('#1: var x = [0,1,2,3]; var arr = x.splice(NaN,3); arr is Array object. Actual: ' + (arr.getClass()));
+}
+
+if (arr.length !== 3) {
+  throw new Test262Error('#2: var x = [0,1,2,3]; var arr = x.splice(NaN,3); arr.length === 3. Actual: ' + (arr.length));
+}
+
+if (arr[0] !== 0) {
+  throw new Test262Error('#3: var x = [0,1,2,3]; var arr = x.splice(NaN,3); arr[0] === 0. Actual: ' + (arr[0]));
+}
+
+if (arr[1] !== 1) {
+  throw new Test262Error('#4: var x = [0,1,2,3]; var arr = x.splice(NaN,3); arr[1] === 1. Actual: ' + (arr[1]));
+}
+
+if (arr[2] !== 2) {
+  throw new Test262Error('#5: var x = [0,1,2,3]; var arr = x.splice(NaN,3); arr[2] === 2. Actual: ' + (arr[2]));
+}
+
+if (x.length !== 1) {
+  throw new Test262Error('#6: var x = [0,1,2,3]; var arr = x.splice(NaN,3); x.length === 1. Actual: ' + (x.length));
+}
+
+if (x[0] !== 3) {
+  throw new Test262Error('#7: var x = [0,1,2,3]; var arr = x.splice(NaN,3); x[0] === 3. Actual: ' + (x[0]));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A2.1_T3.js b/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A2.1_T3.js
new file mode 100644
index 0000000000..0940f78ef5
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A2.1_T3.js
@@ -0,0 +1,38 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: Operator use ToInteger from start
+esid: sec-array.prototype.splice
+description: start = Infinity
+---*/
+
+var x = [0, 1, 2, 3];
+var arr = x.splice(Number.POSITIVE_INFINITY, 3);
+
+arr.getClass = Object.prototype.toString;
+if (arr.getClass() !== "[object " + "Array" + "]") {
+  throw new Test262Error('#1: var x = [0,1,2,3]; var arr = x.splice(Number.POSITIVE_INFINITY,3); arr is Array object. Actual: ' + (arr.getClass()));
+}
+
+if (arr.length !== 0) {
+  throw new Test262Error('#2: var x = [0,1,2,3]; var arr = x.splice(Number.POSITIVE_INFINITY,3); arr.length === 0. Actual: ' + (arr.length));
+}
+
+if (x[0] !== 0) {
+  throw new Test262Error('#3: var x = [0,1,2,3]; var x = x.splice(Number.POSITIVE_INFINITY,3); x[0] === 0. Actual: ' + (x[0]));
+}
+
+if (x[1] !== 1) {
+  throw new Test262Error('#4: var x = [0,1,2,3]; var x = x.splice(Number.POSITIVE_INFINITY,3); x[1] === 1. Actual: ' + (x[1]));
+}
+
+if (x[2] !== 2) {
+  throw new Test262Error('#5: var x = [0,1,2,3]; var x = x.splice(Number.POSITIVE_INFINITY,3); x[2] === 2. Actual: ' + (x[2]));
+}
+
+if (x[3] !== 3) {
+  throw new Test262Error('#6: var x = [0,1,2,3]; var x = x.splice(Number.POSITIVE_INFINITY,3); x[3] === 3. Actual: ' + (x[3]));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A2.1_T4.js b/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A2.1_T4.js
new file mode 100644
index 0000000000..50ce7b402a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A2.1_T4.js
@@ -0,0 +1,42 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: Operator use ToInteger from start
+esid: sec-array.prototype.splice
+description: start = -Infinity
+---*/
+
+var x = [0, 1, 2, 3];
+var arr = x.splice(Number.NEGATIVE_INFINITY, 3);
+
+arr.getClass = Object.prototype.toString;
+if (arr.getClass() !== "[object " + "Array" + "]") {
+  throw new Test262Error('#1: var x = [0,1,2,3]; var arr = x.splice(Number.NEGATIVE_INFINITY,3); arr is Array object. Actual: ' + (arr.getClass()));
+}
+
+if (arr.length !== 3) {
+  throw new Test262Error('#2: var x = [0,1,2,3]; var arr = x.splice(Number.NEGATIVE_INFINITY,3); arr.length === 3. Actual: ' + (arr.length));
+}
+
+if (arr[0] !== 0) {
+  throw new Test262Error('#3: var x = [0,1,2,3]; var arr = x.splice(Number.NEGATIVE_INFINITY,3); arr[0] === 0. Actual: ' + (arr[0]));
+}
+
+if (arr[1] !== 1) {
+  throw new Test262Error('#4: var x = [0,1,2,3]; var arr = x.splice(Number.NEGATIVE_INFINITY,3); arr[1] === 1. Actual: ' + (arr[1]));
+}
+
+if (arr[2] !== 2) {
+  throw new Test262Error('#5: var x = [0,1,2,3]; var arr = x.splice(Number.NEGATIVE_INFINITY,3); arr[2] === 2. Actual: ' + (arr[2]));
+}
+
+if (x.length !== 1) {
+  throw new Test262Error('#6: var x = [0,1,2,3]; var arr = x.splice(Number.NEGATIVE_INFINITY,3); x.length === 1. Actual: ' + (x.length));
+}
+
+if (x[0] !== 3) {
+  throw new Test262Error('#7: var x = [0,1,2,3]; var arr = x.splice(Number.NEGATIVE_INFINITY,3); x[0] === 3. Actual: ' + (x[0]));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A2.1_T5.js b/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A2.1_T5.js
new file mode 100644
index 0000000000..c4d40fc370
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A2.1_T5.js
@@ -0,0 +1,49 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: Operator use ToInteger from start
+esid: sec-array.prototype.splice
+description: ToInteger use ToNumber
+---*/
+
+var x = [0, 1, 2, 3];
+var arr = x.splice({
+  valueOf: function() {
+    return 0
+  },
+  toString: function() {
+    return 3
+  }
+}, 3);
+
+arr.getClass = Object.prototype.toString;
+if (arr.getClass() !== "[object " + "Array" + "]") {
+  throw new Test262Error('#1: var x = [0,1,2,3]; var arr = x.splice({valueOf: function() {return 0}, toString: function() {return 3}},3); arr is Array object. Actual: ' + (arr.getClass()));
+}
+
+if (arr.length !== 3) {
+  throw new Test262Error('#2: var x = [0,1,2,3]; var arr = x.splice({valueOf: function() {return 0}, toString: function() {return 3}},3); arr.length === 3. Actual: ' + (arr.length));
+}
+
+if (arr[0] !== 0) {
+  throw new Test262Error('#3: var x = [0,1,2,3]; var arr = x.splice({valueOf: function() {return 0}, toString: function() {return 3}},3); arr[0] === 0. Actual: ' + (arr[0]));
+}
+
+if (arr[1] !== 1) {
+  throw new Test262Error('#4: var x = [0,1,2,3]; var arr = x.splice({valueOf: function() {return 0}, toString: function() {return 3}},3); arr[1] === 1. Actual: ' + (arr[1]));
+}
+
+if (arr[2] !== 2) {
+  throw new Test262Error('#5: var x = [0,1,2,3]; var arr = x.splice({valueOf: function() {return 0}, toString: function() {return 3}},3); arr[2] === 2. Actual: ' + (arr[2]));
+}
+
+if (x.length !== 1) {
+  throw new Test262Error('#6: var x = [0,1,2,3]; var arr = x.splice({valueOf: function() {return 0}, toString: function() {return 3}},3); x.length === 1. Actual: ' + (x.length));
+}
+
+if (x[0] !== 3) {
+  throw new Test262Error('#7: var x = [0,1,2,3]; var arr = x.splice({valueOf: function() {return 0}, toString: function() {return 3}},3); x[0] === 3. Actual: ' + (x[0]));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A2.2_T1.js b/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A2.2_T1.js
new file mode 100644
index 0000000000..81ab211c69
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A2.2_T1.js
@@ -0,0 +1,42 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: Operator use ToInteger from deleteCount
+esid: sec-array.prototype.splice
+description: deleteCount is not integer
+---*/
+
+var x = [0, 1, 2, 3];
+var arr = x.splice(1, 3.5);
+
+arr.getClass = Object.prototype.toString;
+if (arr.getClass() !== "[object " + "Array" + "]") {
+  throw new Test262Error('#1: var x = [0,1,2,3]; var arr = x.splice(1,3.5); arr is Array object. Actual: ' + (arr.getClass()));
+}
+
+if (arr.length !== 3) {
+  throw new Test262Error('#2: var x = [0,1,2,3]; var arr = x.splice(1,3.5); arr.length === 3. Actual: ' + (arr.length));
+}
+
+if (arr[0] !== 1) {
+  throw new Test262Error('#3: var x = [0,1,2,3]; var arr = x.splice(1,3.5); arr[0] === 1. Actual: ' + (arr[0]));
+}
+
+if (arr[1] !== 2) {
+  throw new Test262Error('#4: var x = [0,1,2,3]; var arr = x.splice(1,3.5); arr[1] === 2. Actual: ' + (arr[1]));
+}
+
+if (arr[2] !== 3) {
+  throw new Test262Error('#5: var x = [0,1,2,3]; var arr = x.splice(1,3.5); arr[2] === 3. Actual: ' + (arr[2]));
+}
+
+if (x.length !== 1) {
+  throw new Test262Error('#6: var x = [0,1,2,3]; var arr = x.splice(1,3.5); x.length === 1. Actual: ' + (x.length));
+}
+
+if (x[0] !== 0) {
+  throw new Test262Error('#7: var x = [0,1,2,3]; var arr = x.splice(1,3.5); x[0] === 0. Actual: ' + (x[0]));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A2.2_T2.js b/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A2.2_T2.js
new file mode 100644
index 0000000000..735374b032
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A2.2_T2.js
@@ -0,0 +1,34 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: Operator use ToInteger from deleteCount
+esid: sec-array.prototype.splice
+description: deleteCount = NaN
+---*/
+
+var x = [0, 1];
+var arr = x.splice(0, NaN);
+
+arr.getClass = Object.prototype.toString;
+if (arr.getClass() !== "[object " + "Array" + "]") {
+  throw new Test262Error('#0: var x = [0,1]; var arr = x.splice(0,NaN); arr is Array object. Actual: ' + (arr.getClass()));
+}
+
+if (arr.length !== 0) {
+  throw new Test262Error('#1: var x = [0,1]; var arr = x.splice(0,NaN); arr.length === 0. Actual: ' + (arr.length));
+}
+
+if (x.length !== 2) {
+  throw new Test262Error('#2: var x = [0,1]; var arr = x.splice(0,NaN); x.length === 2. Actual: ' + (x.length));
+}
+
+if (x[0] !== 0) {
+  throw new Test262Error('#3: var x = [0,1]; var arr = x.splice(0,NaN); x[0] === 0. Actual: ' + (x[0]));
+}
+
+if (x[1] !== 1) {
+  throw new Test262Error('#4: var x = [0,1]; var arr = x.splice(0,NaN); x[1] === 1. Actual: ' + (x[1]));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A2.2_T3.js b/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A2.2_T3.js
new file mode 100644
index 0000000000..26b991deda
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A2.2_T3.js
@@ -0,0 +1,42 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: Operator use ToInteger from deleteCount
+esid: sec-array.prototype.splice
+description: deleteCount = Infinity
+---*/
+
+var x = [0, 1, 2, 3];
+var arr = x.splice(0, Number.POSITIVE_INFINITY);
+
+arr.getClass = Object.prototype.toString;
+if (arr.getClass() !== "[object " + "Array" + "]") {
+  throw new Test262Error('#1: var x = [0,1,2,3]; var arr = x.splice(0,Number.POSITIVE_INFINITY); arr is Array object. Actual: ' + (arr.getClass()));
+}
+
+if (arr.length !== 4) {
+  throw new Test262Error('#2: var x = [0,1,2,3]; var arr = x.splice(0,Number.POSITIVE_INFINITY); arr.length === 4. Actual: ' + (arr.length));
+}
+
+if (arr[0] !== 0) {
+  throw new Test262Error('#3: var x = [0,1,2,3]; var arr = x.splice(0,Number.POSITIVE_INFINITY); arr[0] === 0. Actual: ' + (arr[0]));
+}
+
+if (arr[1] !== 1) {
+  throw new Test262Error('#4: var x = [0,1,2,3]; var arr = x.splice(0,Number.POSITIVE_INFINITY); arr[1] === 1. Actual: ' + (arr[1]));
+}
+
+if (arr[2] !== 2) {
+  throw new Test262Error('#5: var x = [0,1,2,3]; var arr = x.splice(0,Number.POSITIVE_INFINITY); arr[2] === 2. Actual: ' + (arr[2]));
+}
+
+if (arr[3] !== 3) {
+  throw new Test262Error('#6: var x = [0,1,2,3]; var arr = x.splice(0,Number.POSITIVE_INFINITY); arr[3] === 3. Actual: ' + (arr[3]));
+}
+
+if (x.length !== 0) {
+  throw new Test262Error('#7: var x = [0,1,2,3]; var arr = x.splice(0,Number.POSITIVE_INFINITY); x.length === 0. Actual: ' + (x.length));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A2.2_T4.js b/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A2.2_T4.js
new file mode 100644
index 0000000000..a644625c90
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A2.2_T4.js
@@ -0,0 +1,34 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: Operator use ToInteger from deleteCount
+esid: sec-array.prototype.splice
+description: deleteCount = -Infinity
+---*/
+
+var x = [0, 1];
+var arr = x.splice(0, Number.NEGATIVE_INFINITY);
+
+arr.getClass = Object.prototype.toString;
+if (arr.getClass() !== "[object " + "Array" + "]") {
+  throw new Test262Error('#0: var x = [0,1]; var arr = x.splice(0,Number.NEGATIVE_INFINITY); arr is Array object. Actual: ' + (arr.getClass()));
+}
+
+if (arr.length !== 0) {
+  throw new Test262Error('#1: var x = [0,1]; var arr = x.splice(0,Number.NEGATIVE_INFINITY); arr.length === 0. Actual: ' + (arr.length));
+}
+
+if (x.length !== 2) {
+  throw new Test262Error('#2: var x = [0,1]; var arr = x.splice(0,Number.NEGATIVE_INFINITY); x.length === 2. Actual: ' + (x.length));
+}
+
+if (x[0] !== 0) {
+  throw new Test262Error('#3: var x = [0,1]; var arr = x.splice(0,Number.NEGATIVE_INFINITY); x[0] === 0. Actual: ' + (x[0]));
+}
+
+if (x[1] !== 1) {
+  throw new Test262Error('#4: var x = [0,1]; var arr = x.splice(0,Number.NEGATIVE_INFINITY); x[1] === 1. Actual: ' + (x[1]));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A2.2_T5.js b/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A2.2_T5.js
new file mode 100644
index 0000000000..94c5ddcb73
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A2.2_T5.js
@@ -0,0 +1,49 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: Operator use ToInteger from deleteCount
+esid: sec-array.prototype.splice
+description: ToInteger use ToNumber
+---*/
+
+var x = [0, 1, 2, 3];
+var arr = x.splice(0, {
+  valueOf: function() {
+    return 3
+  },
+  toString: function() {
+    return 0
+  }
+});
+
+arr.getClass = Object.prototype.toString;
+if (arr.getClass() !== "[object " + "Array" + "]") {
+  throw new Test262Error('#1: var x = [0,1,2,3]; var arr = x.splice(0,{valueOf: function() {return 3}, toString: function() {return 0}}); arr is Array object. Actual: ' + (arr.getClass()));
+}
+
+if (arr.length !== 3) {
+  throw new Test262Error('#2: var x = [0,1,2,3]; var arr = x.splice(0,{valueOf: function() {return 3}, toString: function() {return 0}}); arr.length === 3. Actual: ' + (arr.length));
+}
+
+if (arr[0] !== 0) {
+  throw new Test262Error('#3: var x = [0,1,2,3]; var arr = x.splice(0,{valueOf: function() {return 3}, toString: function() {return 0}}); arr[0] === 0. Actual: ' + (arr[0]));
+}
+
+if (arr[1] !== 1) {
+  throw new Test262Error('#4: var x = [0,1,2,3]; var arr = x.splice(0,{valueOf: function() {return 3}, toString: function() {return 0}}); arr[1] === 1. Actual: ' + (arr[1]));
+}
+
+if (arr[2] !== 2) {
+  throw new Test262Error('#5: var x = [0,1,2,3]; var arr = x.splice(0,{valueOf: function() {return 3}, toString: function() {return 0}}); arr[2] === 2. Actual: ' + (arr[2]));
+}
+
+if (x.length !== 1) {
+  throw new Test262Error('#6: var x = [0,1,2,3]; var arr = x.splice(0,{valueOf: function() {return 3}, toString: function() {return 0}}); x.length === 1. Actual: ' + (x.length));
+}
+
+if (x[0] !== 3) {
+  throw new Test262Error('#7: var x = [0,1,2,3]; var arr = x.splice(0,{valueOf: function() {return 3}, toString: function() {return 0}}); x[0] === 3. Actual: ' + (x[0]));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A2_T1.js b/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A2_T1.js
new file mode 100644
index 0000000000..dfaffa9409
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A2_T1.js
@@ -0,0 +1,65 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    The splice function is intentionally generic.
+    It does not require that its this value be an Array object
+esid: sec-array.prototype.splice
+description: >
+    If start is positive, use min(start, length).  If deleteCount is
+    positive, use min(deleteCount, length - start)
+---*/
+
+var obj = {
+  0: 0,
+  1: 1,
+  2: 2,
+  3: 3
+};
+obj.length = 4;
+obj.splice = Array.prototype.splice;
+var arr = obj.splice(0, 3, 4, 5);
+
+arr.getClass = Object.prototype.toString;
+if (arr.getClass() !== "[object " + "Array" + "]") {
+  throw new Test262Error('#1: var obj = {0:0,1:1,2:2,3:3}; obj.length = 4; obj.splice = Array.prototype.splice; var arr = obj.splice(0,3,4,5); arr is Array object. Actual: ' + (arr.getClass()));
+}
+
+if (arr.length !== 3) {
+  throw new Test262Error('#2: var obj = {0:0,1:1,2:2,3:3}; obj.length = 4; obj.splice = Array.prototype.splice; var arr = obj.splice(0,3,4,5); arr.length === 3. Actual: ' + (arr.length));
+}
+
+if (arr[0] !== 0) {
+  throw new Test262Error('#3: var obj = {0:0,1:1,2:2,3:3}; obj.length = 4; obj.splice = Array.prototype.splice; var arr = obj.splice(0,3,4,5); arr[0] === 0. Actual: ' + (arr[0]));
+}
+
+if (arr[1] !== 1) {
+  throw new Test262Error('#4: var obj = {0:0,1:1,2:2,3:3}; obj.length = 4; obj.splice = Array.prototype.splice; var arr = obj.splice(0,3,4,5); arr[1] === 1. Actual: ' + (arr[1]));
+}
+
+if (arr[2] !== 2) {
+  throw new Test262Error('#5: var obj = {0:0,1:1,2:2,3:3}; obj.length = 4; obj.splice = Array.prototype.splice; var arr = obj.splice(0,3,4,5); arr[2] === 2. Actual: ' + (arr[2]));
+}
+
+if (obj.length !== 3) {
+  throw new Test262Error('#6: var obj = {0:0,1:1,2:2,3:3}; obj.length = 4; obj.splice = Array.prototype.splice; var arr = obj.splice(0,3,4,5); obj.length === 3. Actual: ' + (obj.length));
+}
+
+if (obj[0] !== 4) {
+  throw new Test262Error('#7: var obj = {0:0,1:1,2:2,3:3}; obj.length = 4; obj.splice = Array.prototype.splice; var arr = obj.splice(0,3,4,5); obj[0] === 4. Actual: ' + (obj[0]));
+}
+
+if (obj[1] !== 5) {
+  throw new Test262Error('#8: var obj = {0:0,1:1,2:2,3:3}; obj.length = 4; obj.splice = Array.prototype.splice; var arr = obj.splice(0,3,4,5); obj[1] === 5. Actual: ' + (obj[1]));
+}
+
+if (obj[2] !== 3) {
+  throw new Test262Error('#9: var obj = {0:0,1:1,2:2,3:3}; obj.length = 4; obj.splice = Array.prototype.splice; var arr = obj.splice(0,3,4,5); obj[2] === 3. Actual: ' + (obj[2]));
+}
+
+if (obj[3] !== undefined) {
+  throw new Test262Error('#10: var obj = {0:0,1:1,2:2,3:3}; obj.length = 4; obj.splice = Array.prototype.splice; var arr = obj.splice(0,3,4,5); obj[3] === undefined. Actual: ' + (obj[3]));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A2_T2.js b/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A2_T2.js
new file mode 100644
index 0000000000..1bb4505470
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A2_T2.js
@@ -0,0 +1,55 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    The splice function is intentionally generic.
+    It does not require that its this value be an Array object
+esid: sec-array.prototype.splice
+description: >
+    If start is negative, use max(start + length, 0).  If deleteCount
+    is negative, use 0
+---*/
+
+var obj = {
+  0: 0,
+  1: 1
+};
+obj.length = 2;
+obj.splice = Array.prototype.splice;
+var arr = obj.splice(-2, -1, 2, 3);
+
+arr.getClass = Object.prototype.toString;
+if (arr.getClass() !== "[object " + "Array" + "]") {
+  throw new Test262Error('#0: var obj = {0:0,1:1}; obj.length = 2; obj.splice = Array.prototype.splice; var arr = obj.splice(-2,-1,2,3); arr is Array object. Actual: ' + (arr.getClass()));
+}
+
+if (arr.length !== 0) {
+  throw new Test262Error('#1: var obj = {0:0,1:1}; obj.length = 2; obj.splice = Array.prototype.splice; var arr = obj.splice(-2,-1,2,3); arr.length === 0. Actual: ' + (arr.length));
+}
+
+if (obj.length !== 4) {
+  throw new Test262Error('#2: var obj = {0:0,1:1}; obj.length = 2; obj.splice = Array.prototype.splice; var arr = obj.splice(-2,-1,2,3); obj.length === 4. Actual: ' + (obj.length));
+}
+
+if (obj[0] !== 2) {
+  throw new Test262Error('#3: var obj = {0:0,1:1}; obj.length = 2; obj.splice = Array.prototype.splice; var arr = obj.splice(-2,-1,2,3); obj[0] === 2. Actual: ' + (obj[0]));
+}
+
+if (obj[1] !== 3) {
+  throw new Test262Error('#4: var obj = {0:0,1:1}; obj.length = 2; obj.splice = Array.prototype.splice; var arr = obj.splice(-2,-1,2,3); obj[1] === 3. Actual: ' + (obj[1]));
+}
+
+if (obj[2] !== 0) {
+  throw new Test262Error('#5: var obj = {0:0,1:1}; obj.length = 2; obj.splice = Array.prototype.splice; var arr = obj.splice(-2,-1,2,3); obj[2] === 0. Actual: ' + (obj[2]));
+}
+
+if (obj[3] !== 1) {
+  throw new Test262Error('#6: var obj = {0:0,1:1}; obj.length = 2; obj.splice = Array.prototype.splice; var arr = obj.splice(-2,-1,2,3); obj[3] === 1. Actual: ' + (obj[3]));
+}
+
+if (obj[4] !== undefined) {
+  throw new Test262Error('#7: var obj = {0:0,1:1}; obj.length = 2; obj.splice = Array.prototype.splice; var arr = obj.splice(-2,-1,2,3); obj[4] === undefined. Actual: ' + (obj[4]));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A2_T3.js b/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A2_T3.js
new file mode 100644
index 0000000000..b884daa1e7
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A2_T3.js
@@ -0,0 +1,55 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    The splice function is intentionally generic.
+    It does not require that its this value be an Array object
+esid: sec-array.prototype.splice
+description: >
+    If start is positive, use min(start, length).  If deleteCount is
+    negative, use 0
+---*/
+
+var obj = {
+  0: 0,
+  1: 1
+};
+obj.length = 2;
+obj.splice = Array.prototype.splice;
+var arr = obj.splice(0, -1, 2, 3);
+
+arr.getClass = Object.prototype.toString;
+if (arr.getClass() !== "[object " + "Array" + "]") {
+  throw new Test262Error('#0: var obj = {0:0,1:1}; obj.length = 2; obj.splice = Array.prototype.splice; var arr = obj.splice(0,-1,2,3); arr is Array object. Actual: ' + (arr.getClass()));
+}
+
+if (arr.length !== 0) {
+  throw new Test262Error('#1: var obj = {0:0,1:1}; obj.length = 2; obj.splice = Array.prototype.splice; var arr = obj.splice(0,-1,2,3); arr.length === 0. Actual: ' + (arr.length));
+}
+
+if (obj.length !== 4) {
+  throw new Test262Error('#2: var obj = {0:0,1:1}; obj.length = 2; obj.splice = Array.prototype.splice; var arr = obj.splice(0,-1,2,3); obj.length === 4. Actual: ' + (obj.length));
+}
+
+if (obj[0] !== 2) {
+  throw new Test262Error('#3: var obj = {0:0,1:1}; obj.length = 2; obj.splice = Array.prototype.splice; var arr = obj.splice(0,-1,2,3); obj[0] === 2. Actual: ' + (obj[0]));
+}
+
+if (obj[1] !== 3) {
+  throw new Test262Error('#4: var obj = {0:0,1:1}; obj.length = 2; obj.splice = Array.prototype.splice; var arr = obj.splice(0,-1,2,3); obj[1] === 3. Actual: ' + (obj[1]));
+}
+
+if (obj[2] !== 0) {
+  throw new Test262Error('#5: var obj = {0:0,1:1}; obj.length = 2; obj.splice = Array.prototype.splice; var arr = obj.splice(0,-1,2,3); obj[2] === 0. Actual: ' + (obj[2]));
+}
+
+if (obj[3] !== 1) {
+  throw new Test262Error('#6: var obj = {0:0,1:1}; obj.length = 2; obj.splice = Array.prototype.splice; var arr = obj.splice(0,-1,2,3); obj[3] === 1. Actual: ' + (obj[3]));
+}
+
+if (obj[4] !== undefined) {
+  throw new Test262Error('#7: var obj = {0:0,1:1}; obj.length = 2; obj.splice = Array.prototype.splice; var arr = obj.splice(0,-1,2,3); obj[4] === undefined. Actual: ' + (obj[4]));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A2_T4.js b/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A2_T4.js
new file mode 100644
index 0000000000..b1c9b0a171
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A2_T4.js
@@ -0,0 +1,65 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    The splice function is intentionally generic.
+    It does not require that its this value be an Array object
+esid: sec-array.prototype.splice
+description: >
+    If start is negative, use max(start + length, 0).  If deleteCount
+    is positive, use min(deleteCount, length - start)
+---*/
+
+var obj = {
+  0: 0,
+  1: 1,
+  2: 2,
+  3: 3
+};
+obj.length = 4;
+obj.splice = Array.prototype.splice;
+var arr = obj.splice(-4, 3, 4, 5);
+
+arr.getClass = Object.prototype.toString;
+if (arr.getClass() !== "[object " + "Array" + "]") {
+  throw new Test262Error('#1: var obj = {0:0,1:1,2:2,3:3}; obj.length = 4; obj.splice = Array.prototype.splice; var arr = obj.splice(-4,3,4,5); arr is Array object. Actual: ' + (arr.getClass()));
+}
+
+if (arr.length !== 3) {
+  throw new Test262Error('#2: var obj = {0:0,1:1,2:2,3:3}; obj.length = 4; obj.splice = Array.prototype.splice; var arr = obj.splice(-4,3,4,5); arr.length === 3. Actual: ' + (arr.length));
+}
+
+if (arr[0] !== 0) {
+  throw new Test262Error('#3: var obj = {0:0,1:1,2:2,3:3}; obj.length = 4; obj.splice = Array.prototype.splice; var arr = obj.splice(-4,3,4,5); arr[0] === 0. Actual: ' + (arr[0]));
+}
+
+if (arr[1] !== 1) {
+  throw new Test262Error('#4: var obj = {0:0,1:1,2:2,3:3}; obj.length = 4; obj.splice = Array.prototype.splice; var arr = obj.splice(-4,3,4,5); arr[1] === 1. Actual: ' + (arr[1]));
+}
+
+if (arr[2] !== 2) {
+  throw new Test262Error('#5: var obj = {0:0,1:1,2:2,3:3}; obj.length = 4; obj.splice = Array.prototype.splice; var arr = obj.splice(-4,3,4,5); arr[2] === 2. Actual: ' + (arr[2]));
+}
+
+if (obj.length !== 3) {
+  throw new Test262Error('#6: var obj = {0:0,1:1,2:2,3:3}; obj.length = 4; obj.splice = Array.prototype.splice; var arr = obj.splice(-4,3,4,5); obj.length === 3. Actual: ' + (obj.length));
+}
+
+if (obj[0] !== 4) {
+  throw new Test262Error('#7: var obj = {0:0,1:1,2:2,3:3}; obj.length = 4; obj.splice = Array.prototype.splice; var arr = obj.splice(-4,3,4,5); obj[0] === 4. Actual: ' + (obj[0]));
+}
+
+if (obj[1] !== 5) {
+  throw new Test262Error('#8: var obj = {0:0,1:1,2:2,3:3}; obj.length = 4; obj.splice = Array.prototype.splice; var arr = obj.splice(-4,3,4,5); obj[1] === 5. Actual: ' + (obj[1]));
+}
+
+if (obj[2] !== 3) {
+  throw new Test262Error('#9: var obj = {0:0,1:1,2:2,3:3}; obj.length = 4; obj.splice = Array.prototype.splice; var arr = obj.splice(-4,3,4,5); obj[2] === 3. Actual: ' + (obj[2]));
+}
+
+if (obj[3] !== undefined) {
+  throw new Test262Error('#10: var obj = {0:0,1:1,2:2,3:3}; obj.length = 4; obj.splice = Array.prototype.splice; var arr = obj.splice(-4,3,4,5); obj[3] === undefined. Actual: ' + (obj[3]));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A3_T1.js b/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A3_T1.js
new file mode 100644
index 0000000000..50ae36021e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A3_T1.js
@@ -0,0 +1,37 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: Check ToLength(length) for non Array objects
+esid: sec-array.prototype.splice
+description: length is arbitrarily
+---*/
+
+var obj = {};
+obj.splice = Array.prototype.splice;
+obj[0] = "x";
+obj[4294967295] = "y";
+obj.length = 4294967296;
+var arr = obj.splice(4294967295, 1);
+
+if (arr.length !== 1) {
+  throw new Test262Error('#1: var obj = {}; obj.splice = Array.prototype.splice; obj[0] = "x"; obj[4294967295] = "y"; obj.length = 4294967296; var arr = obj.splice(4294967295,1); arr.length === 1. Actual: ' + (arr.length));
+}
+
+if (obj.length !== 4294967295) {
+  throw new Test262Error('#2: var obj = {}; obj.splice = Array.prototype.splice; obj[0] = "x"; obj[4294967295] = "y"; obj.length = 4294967296; var arr = obj.splice(4294967295,1); obj.length === 4294967295. Actual: ' + (obj.length));
+}
+
+if (obj[0] !== "x") {
+  throw new Test262Error('#3: var obj = {}; obj.splice = Array.prototype.splice; obj[0] = "x"; obj[4294967295] = "y"; obj.length = 4294967296; var arr = obj.splice(4294967295,1); obj[0] === "x". Actual: ' + (obj[0]));
+}
+
+if (obj[4294967295] !== undefined) {
+  throw new Test262Error('#4: var obj = {}; obj.splice = Array.prototype.splice; obj[0] = "x"; obj[4294967295] = "y"; obj.length = 4294967296; var arr = obj.splice(4294967295,1); obj[4294967295] === undefined. Actual: ' + (obj[4294967295]));
+}
+
+if (arr[0] !== "y") {
+  throw new Test262Error('#5: var obj = {}; obj.splice = Array.prototype.splice; obj[0] = "x"; obj[4294967295] = "y"; obj.length = 4294967296; var arr = obj.splice(4294967295,1); arr[0] === "y". Actual: ' + (arr[0]));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A3_T3.js b/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A3_T3.js
new file mode 100644
index 0000000000..89591be5df
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A3_T3.js
@@ -0,0 +1,32 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: Check ToLength(length) for non Array objects
+esid: sec-array.prototype.splice
+description: length is arbitrarily
+---*/
+
+var obj = {};
+obj.splice = Array.prototype.splice;
+obj[4294967294] = "x";
+obj.length = -1;
+var arr = obj.splice(4294967294, 1);
+
+if (arr.length !== 0) {
+  throw new Test262Error('#1: var obj = {}; obj.splice = Array.prototype.splice; obj[4294967294] = "x"; obj.length = -1; var arr = obj.splice(4294967294,1); arr.length === 0. Actual: ' + (arr.length));
+}
+
+if (arr[0] !== undefined) {
+  throw new Test262Error('#2: var obj = {}; obj.splice = Array.prototype.splice; obj[4294967294] = "x"; obj.length = 1; var arr = obj.splice(4294967294,1); arr[0] === undefined. Actual: ' + (arr[0]));
+}
+
+if (obj.length !== 0) {
+  throw new Test262Error('#3: var obj = {}; obj.splice = Array.prototype.splice; obj[4294967294] = "x"; obj.length = 1; var arr = obj.splice(4294967294,1); obj.length === 0. Actual: ' + (obj.length));
+}
+
+if (obj[4294967294] !== "x") {
+  throw new Test262Error('#4: var obj = {}; obj.splice = Array.prototype.splice; obj[4294967294] = "x"; obj.length = 1; var arr = obj.splice(4294967294,1); obj[4294967294] === "x". Actual: ' + (obj[4294967294]));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A4_T1.js b/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A4_T1.js
new file mode 100644
index 0000000000..212c097720
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A4_T1.js
@@ -0,0 +1,74 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: "[[Get]] from not an inherited property"
+esid: sec-array.prototype.splice
+description: >
+    [[Prototype]] of Array instance is Array.prototype, [[Prototype]
+    of Array.prototype is Object.prototype
+---*/
+
+Array.prototype[1] = -1;
+var x = [0, 1];
+var arr = x.splice(1, 1);
+
+if (arr.length !== 1) {
+  throw new Test262Error('#1: Array.prototype[1] = -1; x = [0,1]; var arr = x.splice(1,1); arr.length === 1. Actual: ' + (arr.length));
+}
+
+if (arr[0] !== 1) {
+  throw new Test262Error('#2: Array.prototype[1] = -1; x = [0,1]; var arr = x.splice(1,1); arr[0] === 1. Actual: ' + (arr[0]));
+}
+
+if (arr[1] !== -1) {
+  throw new Test262Error('#3: Array.prototype[1] = -1; x = [0,1]; var arr = x.splice(1,1); arr[1] === -1. Actual: ' + (arr[1]));
+}
+
+if (x.length !== 1) {
+  throw new Test262Error('#4: Array.prototype[1] = -1; x = [0,1]; var arr = x.splice(1,1); x.length === 1. Actual: ' + (x.length));
+}
+
+if (x[0] !== 0) {
+  throw new Test262Error('#5: Array.prototype[1] = -1; x = [0,1]; var arr = x.splice(1,1); x[0] === 0. Actual: ' + (x[0]));
+}
+
+if (x[1] !== -1) {
+  throw new Test262Error('#6: Array.prototype[1] = -1; x = [0,1]; var arr = x.splice(1,1); x[1] === -1. Actual: ' + (x[1]));
+}
+
+
+Object.prototype[1] = -1;
+Object.prototype.length = 2;
+Object.prototype.splice = Array.prototype.splice;
+x = {
+  0: 0,
+  1: 1
+};
+var arr = x.splice(1, 1);
+
+if (arr.length !== 1) {
+  throw new Test262Error('#7: Object.prototype[1] = -1; Object.prototype.length = 2; Object.prototype.splice = Array.prototype.splice; x = {0:0, 1:1}; var arr = x.splice(1,1); arr.length === 1. Actual: ' + (arr.length));
+}
+
+if (arr[0] !== 1) {
+  throw new Test262Error('#8: Object.prototype[1] = -1; Object.prototype.length = 2; Object.prototype.splice = Array.prototype.splice; x = {0:0, 1:1}; var arr = x.splice(1,1); arr[0] === 1. Actual: ' + (arr[0]));
+}
+
+if (arr[1] !== -1) {
+  throw new Test262Error('#9: Object.prototype[1] = -1; Object.prototype.length = 2; Object.prototype.splice = Array.prototype.splice; x = {0:0, 1:1}; var arr = x.splice(1,1); arr[1] === -1. Actual: ' + (arr[1]));
+}
+
+if (x.length !== 1) {
+  throw new Test262Error('#10: Object.prototype[1] = -1; Object.prototype.length = 2; Object.prototype.splice = Array.prototype.splice; x = {0:0, 1:1}; var arr = x.splice(1,1); x.length === 1. Actual: ' + (x.length));
+}
+
+if (x[0] !== 0) {
+  throw new Test262Error('#11: Object.prototype[1] = -1; Object.prototype.length = 2; Object.prototype.splice = Array.prototype.splice; x = {0:0, 1:1}; var arr = x.splice(1,1); x[0] === 0. Actual: ' + (x[0]));
+}
+
+if (x[1] !== -1) {
+  throw new Test262Error('#12: Object.prototype[1] = -1; Object.prototype.length = 2; Object.prototype.splice = Array.prototype.splice; x = {0:0, 1:1}; var arr = x.splice(1,1); x[1] === -1. Actual: ' + (x[1]));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A4_T2.js b/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A4_T2.js
new file mode 100644
index 0000000000..e086d7f42e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A4_T2.js
@@ -0,0 +1,74 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: "[[Get]] from not an inherited property"
+esid: sec-array.prototype.splice
+description: >
+    [[Prototype]] of Array instance is Array.prototype, [[Prototype]
+    of Array.prototype is Object.prototype
+---*/
+
+Array.prototype[1] = -1;
+var x = [0, 1];
+var arr = x.splice(1, 1, 2);
+
+if (arr.length !== 1) {
+  throw new Test262Error('#1: Array.prototype[1] = -1; x = [0,1]; var arr = x.splice(1,1,2); arr.length === 1. Actual: ' + (arr.length));
+}
+
+if (arr[0] !== 1) {
+  throw new Test262Error('#2: Array.prototype[1] = -1; x = [0,1]; var arr = x.splice(1,1,2); arr[0] === 1. Actual: ' + (arr[0]));
+}
+
+if (arr[1] !== -1) {
+  throw new Test262Error('#3: Array.prototype[1] = -1; x = [0,1]; var arr = x.splice(1,1,2); arr[1] === -1. Actual: ' + (arr[1]));
+}
+
+if (x.length !== 2) {
+  throw new Test262Error('#4: Array.prototype[1] = -1; x = [0,1]; var arr = x.splice(1,1,2); x.length === 2. Actual: ' + (x.length));
+}
+
+if (x[0] !== 0) {
+  throw new Test262Error('#5: Array.prototype[1] = -1; x = [0,1]; var arr = x.splice(1,1,2); x[0] === 0. Actual: ' + (x[0]));
+}
+
+if (x[1] !== 2) {
+  throw new Test262Error('#6: Array.prototype[1] = -1; x = [0,1]; var arr = x.splice(1,1,2); x[1] === 2. Actual: ' + (x[1]));
+}
+
+
+Object.prototype[1] = -1;
+Object.prototype.length = 2;
+Object.prototype.splice = Array.prototype.splice;
+x = {
+  0: 0,
+  1: 1
+};
+var arr = x.splice(1, 1, 2);
+
+if (arr.length !== 1) {
+  throw new Test262Error('#7: Object.prototype[1] = -1; Object.prototype.length = 2; Object.prototype.splice = Array.prototype.splice; x = {0:0, 1:1}; var arr = x.splice(1,1,2); arr.length === 1. Actual: ' + (arr.length));
+}
+
+if (arr[0] !== 1) {
+  throw new Test262Error('#8: Object.prototype[1] = -1; Object.prototype.length = 2; Object.prototype.splice = Array.prototype.splice; x = {0:0, 1:1}; var arr = x.splice(1,1,2); arr[0] === 1. Actual: ' + (arr[0]));
+}
+
+if (arr[1] !== -1) {
+  throw new Test262Error('#9: Object.prototype[1] = -1; Object.prototype.length = 2; Object.prototype.splice = Array.prototype.splice; x = {0:0, 1:1}; var arr = x.splice(1,1,2); arr[1] === -1. Actual: ' + (arr[1]));
+}
+
+if (x.length !== 2) {
+  throw new Test262Error('#10: Object.prototype[1] = -1; Object.prototype.length = 2; Object.prototype.splice = Array.prototype.splice; x = {0:0, 1:1}; var arr = x.splice(1,1,2); x.length === 2. Actual: ' + (x.length));
+}
+
+if (x[0] !== 0) {
+  throw new Test262Error('#11: Object.prototype[1] = -1; Object.prototype.length = 2; Object.prototype.splice = Array.prototype.splice; x = {0:0, 1:1}; var arr = x.splice(1,1,2); x[0] === 0. Actual: ' + (x[0]));
+}
+
+if (x[1] !== 2) {
+  throw new Test262Error('#12: Object.prototype[1] = -1; Object.prototype.length = 2; Object.prototype.splice = Array.prototype.splice; x = {0:0, 1:1}; var arr = x.splice(1,1,2); x[1] === 2. Actual: ' + (x[1]));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A4_T3.js b/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A4_T3.js
new file mode 100644
index 0000000000..e4ea0ce904
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A4_T3.js
@@ -0,0 +1,67 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: "[[Get]] from not an inherited property"
+esid: sec-array.prototype.splice
+description: >
+    [[Prototype]] of Array instance is Array.prototype, [[Prototype]
+    of Array.prototype is Object.prototype
+---*/
+
+Array.prototype[0] = -1;
+var x = [];
+x.length = 1;
+var arr = x.splice(0, 1);
+
+if (arr.length !== 1) {
+  throw new Test262Error('#1: Array.prototype[0] = -1; x = []; x.length = 1; var arr = x.splice(0,1); arr.length === 1. Actual: ' + (arr.length));
+}
+
+if (arr[0] !== -1) {
+  throw new Test262Error('#2: Array.prototype[0] = -1; x = []; x.length = 1; var arr = x.splice(0,1); arr[0] === -1. Actual: ' + (arr[0]));
+}
+
+delete arr[0];
+
+if (arr[0] !== -1) {
+  throw new Test262Error('#3: Array.prototype[0] = -1; x = []; x.length = 1; var arr = x.splice(0,1); delete arr[0]; arr[0] === -1. Actual: ' + (arr[0]));
+}
+
+if (x.length !== 0) {
+  throw new Test262Error('#4: Array.prototype[0] = -1; x = []; x.length = 1; var arr = x.splice(0,1); x.length === 0. Actual: ' + (x.length));
+}
+
+if (x[0] !== -1) {
+  throw new Test262Error('#5: Array.prototype[0] = -1; x = []; x.length = 1; var arr = x.splice(0,1); x[0] === -1. Actual: ' + (x[0]));
+}
+
+Object.prototype[0] = -1;
+Object.prototype.length = 1;
+Object.prototype.splice = Array.prototype.splice;
+x = {};
+var arr = x.splice(0, 1);
+
+if (arr.length !== 1) {
+  throw new Test262Error('#6: Object.prototype[0] = -1; Object.prototype.length = 1; Object.prototype.splice = Array.prototype.splice; x = {}; var arr = x.splice(0,1); arr.length === 1. Actual: ' + (arr.length));
+}
+
+if (arr[0] !== -1) {
+  throw new Test262Error('#7: Object.prototype[0] = -1; Object.prototype.length = 1; Object.prototype.splice = Array.prototype.splice; x = {}; var arr = x.splice(0,1); arr[0] === -1. Actual: ' + (arr[0]));
+}
+
+delete arr[0];
+
+if (arr[0] !== -1) {
+  throw new Test262Error('#8: Object.prototype[0] = -1; Object.prototype.length = 1; Object.prototype.splice = Array.prototype.splice; x = {}; var arr = x.splice(0,1); delete arr[0]; arr[0] === -1. Actual: ' + (arr[0]));
+}
+
+if (x.length !== 0) {
+  throw new Test262Error('#9: Object.prototype[0] = -1; Object.prototype.length = 1; Object.prototype.splice = Array.prototype.splice; x = {}; var arr = x.splice(0,1); x.length === 0. Actual: ' + (x.length));
+}
+
+if (x[0] !== -1) {
+  throw new Test262Error('#10: Object.prototype[0] = -1; Object.prototype.length = 1; Object.prototype.splice = Array.prototype.splice; x = {}; var arr = x.splice(0,1); x[0] === -1. Actual: ' + (x[0]));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A6.1_T1.js b/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A6.1_T1.js
new file mode 100644
index 0000000000..55215f44f5
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A6.1_T1.js
@@ -0,0 +1,26 @@
+// Copyright 2014 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: Array.prototype.splice sets `length` on `this`
+esid: sec-array.prototype.splice
+description: Array.prototype.splice sets `length` on Array
+---*/
+
+var a = [0, 1, 2];
+
+a.splice(1, 2, 4);
+
+if (a.length !== 2) {
+  throw new Test262Error("Expected a.length === 2, actually " + a.length);
+}
+
+if (a[0] !== 0) {
+  throw new Test262Error("Expected a[0] === 0, actually " + a[0]);
+}
+
+if (a[1] !== 4) {
+  throw new Test262Error("Expected a[1] === 4, actually " + a[1]);
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A6.1_T2.js b/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A6.1_T2.js
new file mode 100644
index 0000000000..a865a7bc78
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A6.1_T2.js
@@ -0,0 +1,20 @@
+// Copyright 2014 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: Array.prototype.splice sets `length` on `this`
+esid: sec-array.prototype.splice
+description: Array.prototype.splice throws if `length` is read-only
+---*/
+
+var a = [0, 1, 2];
+
+Object.defineProperty(a, 'length', {
+  writable: false
+});
+
+assert.throws(TypeError, function() {
+  a.splice(1, 2, 4);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A6.1_T3.js b/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A6.1_T3.js
new file mode 100644
index 0000000000..9a6823e058
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/splice/S15.4.4.12_A6.1_T3.js
@@ -0,0 +1,26 @@
+// Copyright 2014 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: Array.prototype.splice sets `length` on `this`
+esid: sec-array.prototype.splice
+description: Array.prototype.splice throws if `length` is read-only
+---*/
+
+var a = {
+  get length() {
+    return 0;
+  },
+  splice: Array.prototype.splice
+};
+
+try {
+  a.splice(1, 2, 4);
+  throw new Test262Error("Expected a TypeError");
+} catch (e) {
+  if (!(e instanceof TypeError)) {
+    throw e;
+  }
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/splice/browser.js b/js/src/tests/test262/built-ins/Array/prototype/splice/browser.js
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/js/src/tests/test262/built-ins/Array/prototype/splice/call-with-boolean.js b/js/src/tests/test262/built-ins/Array/prototype/splice/call-with-boolean.js
new file mode 100644
index 0000000000..c12f3ff2fc
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/splice/call-with-boolean.js
@@ -0,0 +1,13 @@
+// Copyright (c) 2020 Rick Waldron.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.splice
+description: Array.prototype.splice applied to boolean primitive
+includes: [compareArray.js]
+---*/
+
+assert.compareArray(Array.prototype.splice.call(true), [], 'Array.prototype.splice.call(true) must return []');
+assert.compareArray(Array.prototype.splice.call(false), [], 'Array.prototype.splice.call(false) must return []');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/splice/called_with_one_argument.js b/js/src/tests/test262/built-ins/Array/prototype/splice/called_with_one_argument.js
new file mode 100644
index 0000000000..0aa1280c22
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/splice/called_with_one_argument.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2015 André Bargull. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+description: Array.prototype.splice deletes length-start elements when called with one argument
+info: |
+  22.1.3.25 Array.prototype.splice (start, deleteCount , ...items )
+
+  ...
+  9. Else if the number of actual arguments is 1, then
+    a. Let insertCount be 0.
+    b. Let actualDeleteCount be len – actualStart.
+esid: sec-array.prototype.splice
+---*/
+
+var array = ["first", "second", "third"];
+
+var result = array.splice(1);
+
+assert.sameValue(array.length, 1, "array length updated");
+assert.sameValue(array[0], "first", "array[0] unchanged");
+
+assert.sameValue(result.length, 2, "result array length correct");
+assert.sameValue(result[0], "second", "result[0] correct");
+assert.sameValue(result[1], "third", "result[1] correct");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/splice/clamps-length-to-integer-limit.js b/js/src/tests/test262/built-ins/Array/prototype/splice/clamps-length-to-integer-limit.js
new file mode 100644
index 0000000000..e6c7b1d5ee
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/splice/clamps-length-to-integer-limit.js
@@ -0,0 +1,39 @@
+// Copyright (C) 2017 André Bargull. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.splice
+description: >
+  Length values exceeding 2^53-1 are clamped to 2^53-1.
+info: |
+  1. ...
+  2. Let len be ? ToLength(? Get(O, "length")).
+  ...
+  5. If the number of actual arguments is 0, then
+    a. Let insertCount be 0.
+    b. Let actualDeleteCount be 0.
+  ...
+  19. Perform ? Set(O, "length", len - actualDeleteCount + itemCount, true).
+  ...
+features: [exponentiation]
+---*/
+
+var arrayLike = {};
+
+arrayLike.length = 2 ** 53 - 1;
+Array.prototype.splice.call(arrayLike);
+assert.sameValue(arrayLike.length, 2 ** 53 - 1, "Length is 2**53 - 1");
+
+arrayLike.length = 2 ** 53;
+Array.prototype.splice.call(arrayLike);
+assert.sameValue(arrayLike.length, 2 ** 53 - 1, "Length is 2**53");
+
+arrayLike.length = 2 ** 53 + 2;
+Array.prototype.splice.call(arrayLike);
+assert.sameValue(arrayLike.length, 2 ** 53 - 1, "Length is 2**53 + 2");
+
+arrayLike.length = Infinity;
+Array.prototype.splice.call(arrayLike);
+assert.sameValue(arrayLike.length, 2 ** 53 - 1, "Length is Infinity");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/splice/create-ctor-non-object.js b/js/src/tests/test262/built-ins/Array/prototype/splice/create-ctor-non-object.js
new file mode 100644
index 0000000000..6b1532fd96
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/splice/create-ctor-non-object.js
@@ -0,0 +1,45 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.splice
+description: >
+    Behavior when `constructor` property is neither an Object nor undefined
+info: |
+    [...]
+    9. Let A be ? ArraySpeciesCreate(O, actualDeleteCount).
+    [...]
+
+    9.4.2.3 ArraySpeciesCreate
+
+    [...]
+    5. Let C be ? Get(originalArray, "constructor").
+    [...]
+    9. If IsConstructor(C) is false, throw a TypeError exception.
+---*/
+
+var a = [];
+
+a.constructor = null;
+assert.throws(TypeError, function() {
+  a.splice();
+}, 'null value');
+
+a = [];
+a.constructor = 1;
+assert.throws(TypeError, function() {
+  a.splice();
+}, 'number value');
+
+a = [];
+a.constructor = 'string';
+assert.throws(TypeError, function() {
+  a.splice();
+}, 'string value');
+
+a = [];
+a.constructor = true;
+assert.throws(TypeError, function() {
+  a.splice();
+}, 'boolean value');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/splice/create-ctor-poisoned.js b/js/src/tests/test262/built-ins/Array/prototype/splice/create-ctor-poisoned.js
new file mode 100644
index 0000000000..4ce1a38809
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/splice/create-ctor-poisoned.js
@@ -0,0 +1,29 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.splice
+description: Abrupt completion from `constructor` property access
+info: |
+    [...]
+    9. Let A be ? ArraySpeciesCreate(O, actualDeleteCount).
+    [...]
+
+    9.4.2.3 ArraySpeciesCreate
+
+    [...]
+    5. Let C be ? Get(originalArray, "constructor").
+---*/
+
+var a = [];
+
+Object.defineProperty(a, 'constructor', {
+  get: function() {
+    throw new Test262Error();
+  }
+});
+
+assert.throws(Test262Error, function() {
+  a.splice();
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/splice/create-non-array-invalid-len.js b/js/src/tests/test262/built-ins/Array/prototype/splice/create-non-array-invalid-len.js
new file mode 100644
index 0000000000..012abb566a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/splice/create-non-array-invalid-len.js
@@ -0,0 +1,44 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.splice
+description: Abrupt completion from creating a new array
+info: |
+    [...]
+    9. Let A be ? ArraySpeciesCreate(O, actualDeleteCount).
+    [...]
+
+    9.4.2.3 ArraySpeciesCreate
+
+    [...]
+    3. Let isArray be ? IsArray(originalArray).
+    4. If isArray is false, return ? ArrayCreate(length).
+
+    9.4.2.2 ArrayCreate
+
+    [...]
+    3. If length>232-1, throw a RangeError exception.
+---*/
+
+var callCount = 0;
+var maxLength = Math.pow(2, 32);
+var obj = Object.defineProperty({}, 'length', {
+  get: function() {
+    return maxLength;
+  },
+  set: function() {
+    callCount += 1;
+  }
+});
+
+assert.throws(RangeError, function() {
+  Array.prototype.splice.call(obj, 0);
+});
+
+assert.sameValue(
+  callCount,
+  0,
+  'RangeError thrown during array creation, not property modification'
+);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/splice/create-non-array.js b/js/src/tests/test262/built-ins/Array/prototype/splice/create-non-array.js
new file mode 100644
index 0000000000..aaee6cf7f7
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/splice/create-non-array.js
@@ -0,0 +1,36 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.splice
+description: Constructor is ignored for non-Array values
+info: |
+    [...]
+    9. Let A be ? ArraySpeciesCreate(O, actualDeleteCount).
+    [...]
+
+    9.4.2.3 ArraySpeciesCreate
+
+    [...]
+    3. Let isArray be ? IsArray(originalArray).
+    4. If isArray is false, return ? ArrayCreate(length).
+---*/
+
+var obj = {
+  length: 0
+};
+var callCount = 0;
+var result;
+Object.defineProperty(obj, 'constructor', {
+  get: function() {
+    callCount += 1;
+  }
+});
+
+result = Array.prototype.splice.call(obj);
+
+assert.sameValue(callCount, 0, '`constructor` property not accessed');
+assert.sameValue(Object.getPrototypeOf(result), Array.prototype);
+assert(Array.isArray(result), 'result is an Array exotic object');
+assert.sameValue(result.length, 0, 'array created with appropriate length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/splice/create-proto-from-ctor-realm-array.js b/js/src/tests/test262/built-ins/Array/prototype/splice/create-proto-from-ctor-realm-array.js
new file mode 100644
index 0000000000..839397f8b0
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/splice/create-proto-from-ctor-realm-array.js
@@ -0,0 +1,45 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.splice
+description: Prefer Array constructor of current realm record
+info: |
+    1. Let O be ? ToObject(this value).
+    [...]
+    9. Let A be ? ArraySpeciesCreate(O, actualDeleteCount).
+    [...]
+
+    9.4.2.3 ArraySpeciesCreate
+
+    [...]
+    5. Let C be ? Get(originalArray, "constructor").
+    6. If IsConstructor(C) is true, then
+       a. Let thisRealm be the current Realm Record.
+       b. Let realmC be ? GetFunctionRealm(C).
+       c. If thisRealm and realmC are not the same Realm Record, then
+          i. If SameValue(C, realmC.[[Intrinsics]].[[%Array%]]) is true, let C
+             be undefined.
+    [...]
+features: [cross-realm, Symbol.species]
+---*/
+
+var array = [];
+var callCount = 0;
+var OArray = $262.createRealm().global.Array;
+var speciesDesc = {
+  get: function() {
+    callCount += 1;
+  }
+};
+var result;
+array.constructor = OArray;
+
+Object.defineProperty(Array, Symbol.species, speciesDesc);
+Object.defineProperty(OArray, Symbol.species, speciesDesc);
+
+result = array.splice();
+
+assert.sameValue(Object.getPrototypeOf(result), Array.prototype);
+assert.sameValue(callCount, 0, 'Species constructor is not referenced');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/splice/create-proto-from-ctor-realm-non-array.js b/js/src/tests/test262/built-ins/Array/prototype/splice/create-proto-from-ctor-realm-non-array.js
new file mode 100644
index 0000000000..bebe39d151
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/splice/create-proto-from-ctor-realm-non-array.js
@@ -0,0 +1,46 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.splice
+description: Accept non-Array constructors from other realms
+info: |
+    1. Let O be ? ToObject(this value).
+    [...]
+    9. Let A be ? ArraySpeciesCreate(O, actualDeleteCount).
+    [...]
+
+    9.4.2.3 ArraySpeciesCreate
+
+    [...]
+    5. Let C be ? Get(originalArray, "constructor").
+    6. If IsConstructor(C) is true, then
+       a. Let thisRealm be the current Realm Record.
+       b. Let realmC be ? GetFunctionRealm(C).
+       c. If thisRealm and realmC are not the same Realm Record, then
+          i. If SameValue(C, realmC.[[Intrinsics]].[[%Array%]]) is true, let C
+             be undefined.
+    [...]
+features: [cross-realm, Symbol.species]
+---*/
+
+var array = [];
+var callCount = 0;
+var CustomCtor = function() {};
+var OObject = $262.createRealm().global.Object;
+var speciesDesc = {
+  get: function() {
+    callCount += 1;
+  }
+};
+var result;
+array.constructor = OObject;
+OObject[Symbol.species] = CustomCtor;
+
+Object.defineProperty(Array, Symbol.species, speciesDesc);
+
+result = array.splice();
+
+assert.sameValue(Object.getPrototypeOf(result), CustomCtor.prototype);
+assert.sameValue(callCount, 0, 'Array species constructor is not referenced');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/splice/create-proxy.js b/js/src/tests/test262/built-ins/Array/prototype/splice/create-proxy.js
new file mode 100644
index 0000000000..f22f821633
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/splice/create-proxy.js
@@ -0,0 +1,41 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.splice
+description: Species constructor of a Proxy object whose target is an array
+info: |
+    [...]
+    9. Let A be ? ArraySpeciesCreate(O, actualDeleteCount).
+    [...]
+    20. Return A.
+
+    9.4.2.3 ArraySpeciesCreate
+
+    [...]
+    3. Let isArray be ? IsArray(originalArray).
+
+    7.2.2 IsArray
+
+    [...]
+    3. If argument is a Proxy exotic object, then
+       a. If the value of the [[ProxyHandler]] internal slot of argument is
+          null, throw a TypeError exception.
+       b. Let target be the value of the [[ProxyTarget]] internal slot of
+          argument.
+       c. Return ? IsArray(target).
+features: [Proxy, Symbol.species]
+---*/
+
+var array = [];
+var proxy = new Proxy(new Proxy(array, {}), {});
+var Ctor = function() {};
+var result;
+
+array.constructor = function() {};
+array.constructor[Symbol.species] = Ctor;
+
+result = Array.prototype.splice.call(proxy);
+
+assert.sameValue(Object.getPrototypeOf(result), Ctor.prototype);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/splice/create-revoked-proxy.js b/js/src/tests/test262/built-ins/Array/prototype/splice/create-revoked-proxy.js
new file mode 100644
index 0000000000..aa4e45413c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/splice/create-revoked-proxy.js
@@ -0,0 +1,41 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.splice
+description: Abrupt completion from constructor that is a revoked Proxy object
+info: |
+    [...]
+    9. Let A be ? ArraySpeciesCreate(O, actualDeleteCount).
+    [...]
+
+    9.4.2.3 ArraySpeciesCreate
+
+    [...]
+    3. Let isArray be ? IsArray(originalArray).
+
+    7.2.2 IsArray
+
+    [...]
+    3. If argument is a Proxy exotic object, then
+       a. If the value of the [[ProxyHandler]] internal slot of argument is
+          null, throw a TypeError exception.
+features: [Proxy]
+---*/
+
+var o = Proxy.revocable([], {});
+var callCount = 0;
+
+Object.defineProperty(o.proxy, 'constructor', {
+  get: function() {
+    callCount += 1;
+  }
+});
+o.revoke();
+
+assert.throws(TypeError, function() {
+  Array.prototype.splice.call(o.proxy);
+});
+
+assert.sameValue(callCount, 0, '`constructor` property not accessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/splice/create-species-abrupt.js b/js/src/tests/test262/built-ins/Array/prototype/splice/create-species-abrupt.js
new file mode 100644
index 0000000000..175da23d56
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/splice/create-species-abrupt.js
@@ -0,0 +1,35 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.splice
+description: Species constructor returns an abrupt completion
+info: |
+    [...]
+    9. Let A be ? ArraySpeciesCreate(O, actualDeleteCount).
+    [...]
+
+    9.4.2.3 ArraySpeciesCreate
+
+    [...]
+    5. Let C be ? Get(originalArray, "constructor").
+    [...]
+    7. If Type(C) is Object, then
+       a. Let C be ? Get(C, @@species).
+       b. If C is null, let C be undefined.
+    [...]
+    10. Return ? Construct(C, « length »).
+features: [Symbol.species]
+---*/
+
+var Ctor = function() {
+  throw new Test262Error();
+};
+var a = [];
+a.constructor = {};
+a.constructor[Symbol.species] = Ctor;
+
+assert.throws(Test262Error, function() {
+  a.splice();
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/splice/create-species-length-exceeding-integer-limit.js b/js/src/tests/test262/built-ins/Array/prototype/splice/create-species-length-exceeding-integer-limit.js
new file mode 100644
index 0000000000..7342344462
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/splice/create-species-length-exceeding-integer-limit.js
@@ -0,0 +1,91 @@
+// Copyright (C) 2017 André Bargull. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.splice
+description: >
+  Create species constructor with length exceeding integer limit and ensure MOP
+  operations are called in correct order.
+info: |
+  ...
+   9. Let A be ? ArraySpeciesCreate(O, actualDeleteCount).
+  10. Let k be 0.
+  11. Repeat, while k < actualDeleteCount
+    a. Let from be ! ToString(actualStart+k).
+    b. Let fromPresent be ? HasProperty(O, from).
+    c. If fromPresent is true, then
+       i. Let fromValue be ? Get(O, from).
+      ii. Perform ? CreateDataPropertyOrThrow(A, ! ToString(k), fromValue).
+    d. Increment k by 1.
+  12. Perform ? Set(A, "length", actualDeleteCount, true).
+  ...
+includes: [compareArray.js, proxyTrapsHelper.js]
+features: [Symbol.species, exponentiation]
+---*/
+
+function StopSplice() {}
+
+var traps = [];
+var targetLength;
+
+var array = ["no-hole", /* hole */ , "stop"];
+array.constructor = {
+  [Symbol.species]: function(n) {
+    targetLength = n;
+    return target;
+  }
+};
+
+var source = new Proxy(array, allowProxyTraps({
+  get(t, pk, r) {
+    traps.push(`source.[[Get]]:${String(pk)}`);
+
+    // length property exceeding 2^53-1.
+    if (pk === "length")
+      return 2 ** 53 + 2;
+
+    return Reflect.get(t, pk, r);
+  },
+  has(t, pk, r) {
+    traps.push(`source.[[Has]]:${String(pk)}`);
+
+    return Reflect.get(t, pk, r);
+  },
+}));
+
+var target = new Proxy([], allowProxyTraps({
+  defineProperty(t, pk, desc) {
+    traps.push(`target.[[DefineProperty]]:${String(pk)}`);
+
+    if (pk === "0" || pk === "1")
+      return Reflect.defineProperty(t, pk, desc);
+
+    throw new StopSplice();
+  }
+}));
+
+assert.throws(StopSplice, function() {
+  // deleteCount argument exceeding 2^53-1.
+  Array.prototype.splice.call(source, 0, 2 ** 53 + 4);
+}, '// deleteCount argument exceeding 2^53-1. Array.prototype.splice.call(source, 0, 2 ** 53 + 4) throws a StopSplice exception');
+
+assert.sameValue(targetLength, 2 ** 53 - 1,
+  'The value of targetLength is expected to be 2 ** 53 - 1');
+
+assert.compareArray(traps, [
+  "source.[[Get]]:length",
+
+  "source.[[Get]]:constructor",
+
+  "source.[[Has]]:0",
+  "source.[[Get]]:0",
+  "target.[[DefineProperty]]:0",
+
+  "source.[[Has]]:1",
+
+  "source.[[Has]]:2",
+  "source.[[Get]]:2",
+  "target.[[DefineProperty]]:2",
+], 'The value of traps is expected to be [\n  "source.[[Get]]:length",\n\n  "source.[[Get]]:constructor",\n\n  "source.[[Has]]:0",\n  "source.[[Get]]:0",\n  "target.[[DefineProperty]]:0",\n\n  "source.[[Has]]:1",\n\n  "source.[[Has]]:2",\n  "source.[[Get]]:2",\n  "target.[[DefineProperty]]:2",\n]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/splice/create-species-neg-zero.js b/js/src/tests/test262/built-ins/Array/prototype/splice/create-species-neg-zero.js
new file mode 100644
index 0000000000..9974cc03ae
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/splice/create-species-neg-zero.js
@@ -0,0 +1,51 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.splice
+description: The value `-0` is converted to `0`
+info: |
+    [...]
+    3. Let relativeStart be ? ToInteger(start).
+    4. If relativeStart < 0, let actualStart be max((len + relativeStart), 0);
+       else let actualStart be min(relativeStart, len).
+    5. If the number of actual arguments is 0, then
+       [...]
+    6. Else if the number of actual arguments is 1, then
+       [...]
+    7. Else,
+       a. Let insertCount be the number of actual arguments minus 2.
+       b. Let dc be ? ToInteger(deleteCount).
+       c. Let actualDeleteCount be min(max(dc, 0), len - actualStart).
+    [...]
+    9. Let A be ? ArraySpeciesCreate(O, actualDeleteCount).
+    [...]
+
+    9.4.2.3 ArraySpeciesCreate
+
+    [...]
+    2. If length is -0, let length be +0.
+    [...]
+    5. Let C be ? Get(originalArray, "constructor").
+    [...]
+    7. If Type(C) is Object, then
+       a. Let C be ? Get(C, @@species).
+       b. If C is null, let C be undefined.
+    [...]
+    10. Return ? Construct(C, « length »).
+features: [Symbol.species]
+---*/
+
+var args;
+var Ctor = function() {
+  args = arguments;
+};
+var a = [];
+a.constructor = {};
+a.constructor[Symbol.species] = Ctor;
+
+a.splice(0, -0);
+
+assert.sameValue(args.length, 1);
+assert.sameValue(args[0], 0);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/splice/create-species-non-ctor.js b/js/src/tests/test262/built-ins/Array/prototype/splice/create-species-non-ctor.js
new file mode 100644
index 0000000000..826fe92b14
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/splice/create-species-non-ctor.js
@@ -0,0 +1,41 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.splice
+description: >
+    Behavior when the @@species attribute is a non-constructor object
+info: |
+    [...]
+    9. Let A be ? ArraySpeciesCreate(O, actualDeleteCount).
+    [...]
+
+    9.4.2.3 ArraySpeciesCreate
+
+    [...]
+    5. Let C be ? Get(originalArray, "constructor").
+    [...]
+    7. If Type(C) is Object, then
+       a. Let C be ? Get(C, @@species).
+       b. If C is null, let C be undefined.
+    [...]
+    9. If IsConstructor(C) is false, throw a TypeError exception.
+includes: [isConstructor.js]
+features: [Symbol.species, Reflect.construct]
+---*/
+
+assert.sameValue(
+  isConstructor(parseInt),
+  false,
+  'precondition: isConstructor(parseInt) must return false'
+);
+
+var a = [];
+
+a.constructor = {};
+a.constructor[Symbol.species] = parseInt;
+
+assert.throws(TypeError, function() {
+  a.splice();
+}, 'a.splice() throws a TypeError exception');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/splice/create-species-null.js b/js/src/tests/test262/built-ins/Array/prototype/splice/create-species-null.js
new file mode 100644
index 0000000000..e734720df4
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/splice/create-species-null.js
@@ -0,0 +1,35 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.splice
+description: >
+    A null value for the @@species constructor is interpreted as `undefined`
+info: |
+    [...]
+    9. Let A be ? ArraySpeciesCreate(O, actualDeleteCount).
+    [...]
+
+    9.4.2.3 ArraySpeciesCreate
+
+    [...]
+    5. Let C be ? Get(originalArray, "constructor").
+    [...]
+    7. If Type(C) is Object, then
+       a. Let C be ? Get(C, @@species).
+       b. If C is null, let C be undefined.
+    8. If C is undefined, return ? ArrayCreate(length).
+features: [Symbol.species]
+---*/
+
+var a = [];
+var result;
+
+a.constructor = {};
+a.constructor[Symbol.species] = null;
+
+result = a.splice();
+
+assert.sameValue(Object.getPrototypeOf(result), Array.prototype);
+assert(Array.isArray(result), 'result is an Array exotic object');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/splice/create-species-poisoned.js b/js/src/tests/test262/built-ins/Array/prototype/splice/create-species-poisoned.js
new file mode 100644
index 0000000000..5cbeabce3a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/splice/create-species-poisoned.js
@@ -0,0 +1,34 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.splice
+description: Abrupt completion from `@@species` property access
+info: |
+    [...]
+    9. Let A be ? ArraySpeciesCreate(O, actualDeleteCount).
+    [...]
+
+    9.4.2.3 ArraySpeciesCreate
+
+    [...]
+    5. Let C be ? Get(originalArray, "constructor").
+    [...]
+    7. If Type(C) is Object, then
+       a. Let C be ? Get(C, @@species).
+features: [Symbol.species]
+---*/
+
+var a = [];
+a.constructor = {};
+
+Object.defineProperty(a.constructor, Symbol.species, {
+  get: function() {
+    throw new Test262Error();
+  }
+});
+
+assert.throws(Test262Error, function() {
+  a.splice();
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/splice/create-species-undef-invalid-len.js b/js/src/tests/test262/built-ins/Array/prototype/splice/create-species-undef-invalid-len.js
new file mode 100644
index 0000000000..6175d7be6b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/splice/create-species-undef-invalid-len.js
@@ -0,0 +1,56 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.splice
+description: >
+    An undefined value for the @@species constructor triggers the creation  of
+    an Array exotic object
+info: |
+    [...]
+    9. Let A be ? ArraySpeciesCreate(O, actualDeleteCount).
+    [...]
+
+    9.4.2.3 ArraySpeciesCreate
+
+    [...]
+    5. Let C be ? Get(originalArray, "constructor").
+    [...]
+    7. If Type(C) is Object, then
+       a. Let C be ? Get(C, @@species).
+       b. If C is null, let C be undefined.
+    8. If C is undefined, return ? ArrayCreate(length).
+
+    9.4.2.2 ArrayCreate
+
+    [...]
+    3. If length>232-1, throw a RangeError exception.
+features: [Proxy]
+---*/
+
+var array = [];
+var maxLength = Math.pow(2, 32);
+var callCount = 0;
+var proxy = new Proxy(array, {
+  get: function(_, name) {
+    if (name === 'length') {
+      return maxLength;
+    }
+    return array[name];
+  },
+  set: function() {
+    callCount += 1;
+    return true;
+  }
+});
+
+assert.throws(RangeError, function() {
+  Array.prototype.splice.call(proxy, 0);
+});
+
+assert.sameValue(
+  callCount,
+  0,
+  'RangeError thrown during array creation, not property modification'
+);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/splice/create-species-undef.js b/js/src/tests/test262/built-ins/Array/prototype/splice/create-species-undef.js
new file mode 100644
index 0000000000..d96d50decf
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/splice/create-species-undef.js
@@ -0,0 +1,36 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.splice
+description: >
+    An undefined value for the @@species constructor triggers the creation  of
+    an Array exotic object
+info: |
+    [...]
+    9. Let A be ? ArraySpeciesCreate(O, actualDeleteCount).
+    [...]
+
+    9.4.2.3 ArraySpeciesCreate
+
+    [...]
+    5. Let C be ? Get(originalArray, "constructor").
+    [...]
+    7. If Type(C) is Object, then
+       a. Let C be ? Get(C, @@species).
+       b. If C is null, let C be undefined.
+    8. If C is undefined, return ? ArrayCreate(length).
+features: [Symbol.species]
+---*/
+
+var a = [];
+var result;
+
+a.constructor = {};
+a.constructor[Symbol.species] = undefined;
+
+result = a.splice();
+
+assert.sameValue(Object.getPrototypeOf(result), Array.prototype);
+assert(Array.isArray(result), 'result is an Array exotic object');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/splice/create-species.js b/js/src/tests/test262/built-ins/Array/prototype/splice/create-species.js
new file mode 100644
index 0000000000..c6ea6483a9
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/splice/create-species.js
@@ -0,0 +1,45 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.splice
+description: Species constructor is used to create a new instance
+info: |
+    [...]
+    9. Let A be ? ArraySpeciesCreate(O, actualDeleteCount).
+    [...]
+
+    9.4.2.3 ArraySpeciesCreate
+
+    [...]
+    5. Let C be ? Get(originalArray, "constructor").
+    [...]
+    7. If Type(C) is Object, then
+       a. Let C be ? Get(C, @@species).
+       b. If C is null, let C be undefined.
+    [...]
+    10. Return ? Construct(C, « length »).
+features: [Symbol.species]
+---*/
+
+var thisValue, args, result;
+var callCount = 0;
+var instance = [];
+var Ctor = function() {
+  callCount += 1;
+  thisValue = this;
+  args = arguments;
+  return instance;
+};
+var a = [1, 2, 3, 4, 5];
+a.constructor = {};
+a.constructor[Symbol.species] = Ctor;
+
+result = a.splice(2);
+
+assert.sameValue(callCount, 1, 'Constructor invoked exactly once');
+assert.sameValue(Object.getPrototypeOf(thisValue), Ctor.prototype);
+assert.sameValue(args.length, 1, 'Constructor invoked with a single argument');
+assert.sameValue(args[0], 3);
+assert.sameValue(result, instance);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/splice/length-and-deleteCount-exceeding-integer-limit.js b/js/src/tests/test262/built-ins/Array/prototype/splice/length-and-deleteCount-exceeding-integer-limit.js
new file mode 100644
index 0000000000..1436e7f162
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/splice/length-and-deleteCount-exceeding-integer-limit.js
@@ -0,0 +1,57 @@
+// Copyright (C) 2017 André Bargull. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.splice
+description: >
+  Length and deleteCount are both clamped to 2^53-1 when they exceed the integer limit.
+info: |
+  ...
+  2. Let len be ? ToLength(? Get(O, "length")).
+  ...
+  7. Else,
+    a. Let insertCount be the number of actual arguments minus 2.
+    b. Let dc be ? ToInteger(deleteCount).
+    c. Let actualDeleteCount be min(max(dc, 0), len - actualStart).
+  ...
+  11. Repeat, while k < actualDeleteCount
+    a. Let from be ! ToString(actualStart+k).
+    b. Let fromPresent be ? HasProperty(O, from).
+    c. If fromPresent is true, then
+       i. Let fromValue be ? Get(O, from).
+      ii. Perform ? CreateDataPropertyOrThrow(A, ! ToString(k), fromValue).
+    d. Increment k by 1.
+  ...
+includes: [compareArray.js]
+features: [exponentiation]
+---*/
+
+var arrayLike = {
+  "9007199254740988": "9007199254740988",
+  "9007199254740989": "9007199254740989",
+  "9007199254740990": "9007199254740990",
+  "9007199254740991": "9007199254740991",
+  length: 2 ** 53 + 2,
+};
+
+var result = Array.prototype.splice.call(arrayLike, 9007199254740989, 2 ** 53 + 4);
+
+assert.compareArray(result, ["9007199254740989", "9007199254740990"],
+  'The value of result is expected to be ["9007199254740989", "9007199254740990"]');
+
+assert.sameValue(arrayLike.length, 2 ** 53 - 3,
+  'The value of arrayLike.length is expected to be 2 ** 53 - 3');
+
+assert.sameValue(arrayLike["9007199254740988"], "9007199254740988",
+  'The value of arrayLike["9007199254740988"] is expected to be "9007199254740988"');
+
+assert.sameValue("9007199254740989" in arrayLike, false,
+  'The result of evaluating ("9007199254740989" in arrayLike) is expected to be false');
+
+assert.sameValue("9007199254740990" in arrayLike, false,
+  'The result of evaluating ("9007199254740990" in arrayLike) is expected to be false');
+
+assert.sameValue(arrayLike["9007199254740991"], "9007199254740991",
+  'The value of arrayLike["9007199254740991"] is expected to be "9007199254740991"');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/splice/length-exceeding-integer-limit-shrink-array.js b/js/src/tests/test262/built-ins/Array/prototype/splice/length-exceeding-integer-limit-shrink-array.js
new file mode 100644
index 0000000000..cd3420ae11
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/splice/length-exceeding-integer-limit-shrink-array.js
@@ -0,0 +1,67 @@
+// Copyright (C) 2017 André Bargull. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.splice
+description: >
+  An element is removed from an array-like object whose length exceeds the integer limit.
+info: |
+  ...
+  15. If itemCount < actualDeleteCount, then
+    a. Let k be actualStart.
+    b. Repeat, while k < (len - actualDeleteCount)
+        i. Let from be ! ToString(k+actualDeleteCount).
+       ii. Let to be ! ToString(k+itemCount).
+      iii. Let fromPresent be ? HasProperty(O, from).
+       iv. If fromPresent is true, then
+          1. Let fromValue be ? Get(O, from).
+          2. Perform ? Set(O, to, fromValue, true).
+        v. Else fromPresent is false,
+          1. Perform ? DeletePropertyOrThrow(O, to).
+       vi. Increase k by 1.
+    c. Let k be len.
+    d. Repeat, while k > (len - actualDeleteCount + itemCount)
+       i. Perform ? DeletePropertyOrThrow(O, ! ToString(k-1)).
+      ii. Decrease k by 1.
+  ...
+includes: [compareArray.js]
+features: [exponentiation]
+---*/
+
+var arrayLike = {
+  "9007199254740986": "9007199254740986",
+  "9007199254740987": "9007199254740987",
+  "9007199254740988": "9007199254740988",
+  /* "9007199254740989": hole */
+  "9007199254740990": "9007199254740990",
+  "9007199254740991": "9007199254740991",
+  length: 2 ** 53 + 2,
+};
+
+var result = Array.prototype.splice.call(arrayLike, 9007199254740987, 1);
+
+assert.compareArray(result, ["9007199254740987"],
+  'The value of result is expected to be ["9007199254740987"]');
+
+assert.sameValue(arrayLike.length, 2 ** 53 - 2,
+  'The value of arrayLike.length is expected to be 2 ** 53 - 2');
+
+assert.sameValue(arrayLike["9007199254740986"], "9007199254740986",
+  'The value of arrayLike["9007199254740986"] is expected to be "9007199254740986"');
+
+assert.sameValue(arrayLike["9007199254740987"], "9007199254740988",
+  'The value of arrayLike["9007199254740987"] is expected to be "9007199254740988"');
+
+assert.sameValue("9007199254740988" in arrayLike, false,
+  'The result of evaluating ("9007199254740988" in arrayLike) is expected to be false');
+
+assert.sameValue(arrayLike["9007199254740989"], "9007199254740990",
+  'The value of arrayLike["9007199254740989"] is expected to be "9007199254740990"');
+
+assert.sameValue("9007199254740990" in arrayLike, false,
+  'The result of evaluating ("9007199254740990" in arrayLike) is expected to be false');
+
+assert.sameValue(arrayLike["9007199254740991"], "9007199254740991",
+  'The value of arrayLike["9007199254740991"] is expected to be "9007199254740991"');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/splice/length-near-integer-limit-grow-array.js b/js/src/tests/test262/built-ins/Array/prototype/splice/length-near-integer-limit-grow-array.js
new file mode 100644
index 0000000000..1f731912e7
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/splice/length-near-integer-limit-grow-array.js
@@ -0,0 +1,65 @@
+// Copyright (C) 2017 André Bargull. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.splice
+description: >
+  A value is inserted in an array-like object whose length property is near the integer limit.
+info: |
+  ...
+  16. Else if itemCount > actualDeleteCount, then
+    a. Let k be (len - actualDeleteCount).
+    b. Repeat, while k > actualStart
+        i. Let from be ! ToString(k + actualDeleteCount - 1).
+       ii. Let to be ! ToString(k + itemCount - 1).
+      iii. Let fromPresent be ? HasProperty(O, from).
+       iv. If fromPresent is true, then
+          1. Let fromValue be ? Get(O, from).
+          2. Perform ? Set(O, to, fromValue, true).
+        v. Else fromPresent is false,
+          1. Perform ? DeletePropertyOrThrow(O, to).
+       vi. Decrease k by 1.
+  ...
+includes: [compareArray.js]
+features: [exponentiation]
+---*/
+
+var arrayLike = {
+  "9007199254740985": "9007199254740985",
+  "9007199254740986": "9007199254740986",
+  "9007199254740987": "9007199254740987",
+  /* "9007199254740988": hole */
+  "9007199254740989": "9007199254740989",
+  /* "9007199254740990": empty */
+  "9007199254740991": "9007199254740991",
+  length: 2 ** 53 - 2,
+};
+
+var result = Array.prototype.splice.call(arrayLike, 9007199254740986, 0, "new-value");
+
+assert.compareArray(result, [], 'The value of result is expected to be []');
+
+assert.sameValue(arrayLike.length, 2 ** 53 - 1, 'The value of arrayLike.length is expected to be 2 ** 53 - 1');
+
+assert.sameValue(arrayLike["9007199254740985"], "9007199254740985",
+  'The value of arrayLike["9007199254740985"] is expected to be "9007199254740985"');
+
+assert.sameValue(arrayLike["9007199254740986"], "new-value",
+  'The value of arrayLike["9007199254740986"] is expected to be "new-value"');
+
+assert.sameValue(arrayLike["9007199254740987"], "9007199254740986",
+  'The value of arrayLike["9007199254740987"] is expected to be "9007199254740986"');
+
+assert.sameValue(arrayLike["9007199254740988"], "9007199254740987",
+  'The value of arrayLike["9007199254740988"] is expected to be "9007199254740987"');
+
+assert.sameValue("9007199254740989" in arrayLike, false,
+  'The result of evaluating ("9007199254740989" in arrayLike) is expected to be false');
+
+assert.sameValue(arrayLike["9007199254740990"], "9007199254740989",
+  'The value of arrayLike["9007199254740990"] is expected to be "9007199254740989"');
+
+assert.sameValue(arrayLike["9007199254740991"], "9007199254740991",
+  'The value of arrayLike["9007199254740991"] is expected to be "9007199254740991"');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/splice/length.js b/js/src/tests/test262/built-ins/Array/prototype/splice/length.js
new file mode 100644
index 0000000000..d701b42ae5
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/splice/length.js
@@ -0,0 +1,30 @@
+// Copyright (C) 2017 Leo Balter. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.splice
+description: >
+  The "length" property of Array.prototype.splice
+info: |
+  17 ECMAScript Standard Built-in Objects
+
+  Every built-in function object, including constructors, has a length property
+  whose value is an integer. Unless otherwise specified, this value is equal to
+  the largest number of named arguments shown in the subclause headings for the
+  function description. Optional parameters (which are indicated with brackets:
+  [ ]) or rest parameters (which are shown using the form «...name») are not
+  included in the default argument count.
+
+  Unless otherwise specified, the length property of a built-in function object
+  has the attributes { [[Writable]]: false, [[Enumerable]]: false,
+    [[Configurable]]: true }.
+includes: [propertyHelper.js]
+---*/
+
+assert.sameValue(Array.prototype.splice.length, 2);
+
+verifyNotEnumerable(Array.prototype.splice, 'length');
+verifyNotWritable(Array.prototype.splice, 'length');
+verifyConfigurable(Array.prototype.splice, 'length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/splice/name.js b/js/src/tests/test262/built-ins/Array/prototype/splice/name.js
new file mode 100644
index 0000000000..a0107f69c4
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/splice/name.js
@@ -0,0 +1,28 @@
+// Copyright (C) 2015 André Bargull. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.splice
+description: >
+  Array.prototype.splice.name is "splice".
+info: |
+  Array.prototype.splice (start, deleteCount , ...items )
+
+  17 ECMAScript Standard Built-in Objects:
+    Every built-in Function object, including constructors, that is not
+    identified as an anonymous function has a name property whose value
+    is a String.
+
+    Unless otherwise specified, the name property of a built-in Function
+    object, if it exists, has the attributes { [[Writable]]: false,
+    [[Enumerable]]: false, [[Configurable]]: true }.
+includes: [propertyHelper.js]
+---*/
+
+assert.sameValue(Array.prototype.splice.name, "splice");
+
+verifyNotEnumerable(Array.prototype.splice, "name");
+verifyNotWritable(Array.prototype.splice, "name");
+verifyConfigurable(Array.prototype.splice, "name");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/splice/not-a-constructor.js b/js/src/tests/test262/built-ins/Array/prototype/splice/not-a-constructor.js
new file mode 100644
index 0000000000..674f869d3a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/splice/not-a-constructor.js
@@ -0,0 +1,35 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Array.prototype.splice does not implement [[Construct]], is not new-able
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+
+  sec-evaluatenew
+
+  ...
+  7. If IsConstructor(constructor) is false, throw a TypeError exception.
+  ...
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Array.prototype.splice),
+  false,
+  'isConstructor(Array.prototype.splice) must return false'
+);
+
+assert.throws(TypeError, () => {
+  new Array.prototype.splice();
+}, '`new Array.prototype.splice()` throws TypeError');
+
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/splice/prop-desc.js b/js/src/tests/test262/built-ins/Array/prototype/splice/prop-desc.js
new file mode 100644
index 0000000000..f6608b1f85
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/splice/prop-desc.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2017 Leo Balter. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.splice
+description: >
+  "splice" property of Array.prototype
+info: |
+  17 ECMAScript Standard Built-in Objects
+  
+  Every other data property described in clauses 18 through 26 and in Annex B.2
+  has the attributes { [[Writable]]: true, [[Enumerable]]: false,
+    [[Configurable]]: true } unless otherwise specified.
+includes: [propertyHelper.js]
+---*/
+
+assert.sameValue(typeof Array.prototype.splice, 'function', 'typeof');
+
+verifyNotEnumerable(Array.prototype, "splice");
+verifyWritable(Array.prototype, "splice");
+verifyConfigurable(Array.prototype, "splice");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/splice/property-traps-order-with-species.js b/js/src/tests/test262/built-ins/Array/prototype/splice/property-traps-order-with-species.js
new file mode 100644
index 0000000000..03436e9dca
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/splice/property-traps-order-with-species.js
@@ -0,0 +1,40 @@
+// Copyright (C) 2018 André Bargull. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.splice
+description: >
+  Ensure the correct property traps are called on the new array.
+features: [Proxy, Symbol.species]
+includes: [compareArray.js]
+---*/
+
+var log = [];
+
+var a = [0, 1];
+a.constructor = {};
+
+a.constructor[Symbol.species] = function(len) {
+    return new Proxy(new Array(len), new Proxy({}, {
+        get(t, pk, r) {
+            log.push(pk);
+        }
+    }));
+};
+
+var r = a.splice(0);
+
+assert.compareArray([
+    // Step 11.c.ii: CreateDataPropertyOrThrow(A, ! ToString(k), fromValue).
+    "defineProperty",
+
+    // Step 11.c.ii: CreateDataPropertyOrThrow(A, ! ToString(k), fromValue).
+    "defineProperty",
+
+    // Step 12: Perform ? Set(A, "length", actualDeleteCount, true).
+    "set",
+    "getOwnPropertyDescriptor",
+    "defineProperty",
+], log);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/splice/set_length_no_args.js b/js/src/tests/test262/built-ins/Array/prototype/splice/set_length_no_args.js
new file mode 100644
index 0000000000..ee2153fde0
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/splice/set_length_no_args.js
@@ -0,0 +1,36 @@
+// Copyright (C) 2015 André Bargull. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+description: Array.prototype.splice sets length when called with no arguments
+info: |
+  22.1.3.25 Array.prototype.splice (start, deleteCount , ...items )
+
+  ...
+  24. Let setStatus be Set(O, "length", len – actualDeleteCount + itemCount, true).
+  25. ReturnIfAbrupt(setStatus).
+esid: sec-array.prototype.splice
+---*/
+
+var getCallCount = 0,
+  setCallCount = 0;
+var lengthValue;
+
+var obj = {
+  get length() {
+    getCallCount += 1;
+    return "0";
+  },
+  set length(v) {
+    setCallCount += 1;
+    lengthValue = v;
+  }
+};
+
+Array.prototype.splice.call(obj);
+
+assert.sameValue(getCallCount, 1, "Get('length') called exactly once");
+assert.sameValue(setCallCount, 1, "Set('length') called exactly once");
+assert.sameValue(lengthValue, 0, "Set('length') called with ToLength('0')");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/splice/shell.js b/js/src/tests/test262/built-ins/Array/prototype/splice/shell.js
new file mode 100644
index 0000000000..bc72493f03
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/splice/shell.js
@@ -0,0 +1,33 @@
+// GENERATED, DO NOT EDIT
+// file: proxyTrapsHelper.js
+// Copyright (C) 2016 Jordan Harband.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+description: |
+    Used to assert the correctness of object behavior in the presence
+    and context of Proxy objects.
+defines: [allowProxyTraps]
+---*/
+
+function allowProxyTraps(overrides) {
+  function throwTest262Error(msg) {
+    return function () { throw new Test262Error(msg); };
+  }
+  if (!overrides) { overrides = {}; }
+  return {
+    getPrototypeOf: overrides.getPrototypeOf || throwTest262Error('[[GetPrototypeOf]] trap called'),
+    setPrototypeOf: overrides.setPrototypeOf || throwTest262Error('[[SetPrototypeOf]] trap called'),
+    isExtensible: overrides.isExtensible || throwTest262Error('[[IsExtensible]] trap called'),
+    preventExtensions: overrides.preventExtensions || throwTest262Error('[[PreventExtensions]] trap called'),
+    getOwnPropertyDescriptor: overrides.getOwnPropertyDescriptor || throwTest262Error('[[GetOwnProperty]] trap called'),
+    has: overrides.has || throwTest262Error('[[HasProperty]] trap called'),
+    get: overrides.get || throwTest262Error('[[Get]] trap called'),
+    set: overrides.set || throwTest262Error('[[Set]] trap called'),
+    deleteProperty: overrides.deleteProperty || throwTest262Error('[[Delete]] trap called'),
+    defineProperty: overrides.defineProperty || throwTest262Error('[[DefineOwnProperty]] trap called'),
+    enumerate: throwTest262Error('[[Enumerate]] trap called: this trap has been removed'),
+    ownKeys: overrides.ownKeys || throwTest262Error('[[OwnPropertyKeys]] trap called'),
+    apply: overrides.apply || throwTest262Error('[[Call]] trap called'),
+    construct: overrides.construct || throwTest262Error('[[Construct]] trap called')
+  };
+}
diff --git a/js/src/tests/test262/built-ins/Array/prototype/splice/target-array-non-extensible.js b/js/src/tests/test262/built-ins/Array/prototype/splice/target-array-non-extensible.js
new file mode 100644
index 0000000000..d7184b2af6
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/splice/target-array-non-extensible.js
@@ -0,0 +1,41 @@
+// Copyright (C) 2020 Alexey Shvayka. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.splice
+description: >
+  TypeError is thrown if CreateDataProperty fails.
+  (result object is non-extensible)
+info: |
+  Array.prototype.splice ( start, deleteCount, ...items )
+
+  [...]
+  11. Repeat, while k < actualDeleteCount
+    [...]
+    c. If fromPresent is true, then
+      [...]
+      ii. Perform ? CreateDataPropertyOrThrow(A, ! ToString(k), fromValue).
+    [...]
+
+  CreateDataPropertyOrThrow ( O, P, V )
+
+  [...]
+  3. Let success be ? CreateDataProperty(O, P, V).
+  4. If success is false, throw a TypeError exception.
+features: [Symbol.species]
+---*/
+
+var A = function(_length) {
+  this.length = 0;
+  Object.preventExtensions(this);
+};
+
+var arr = [1];
+arr.constructor = {};
+arr.constructor[Symbol.species] = A;
+
+assert.throws(TypeError, function() {
+  arr.splice(0);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/splice/target-array-with-non-configurable-property.js b/js/src/tests/test262/built-ins/Array/prototype/splice/target-array-with-non-configurable-property.js
new file mode 100644
index 0000000000..93727a9a1c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/splice/target-array-with-non-configurable-property.js
@@ -0,0 +1,43 @@
+// Copyright (C) 2020 Alexey Shvayka. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.splice
+description: >
+  TypeError is thrown if CreateDataProperty fails.
+  (result object's "0" is non-configurable)
+info: |
+  Array.prototype.splice ( start, deleteCount, ...items )
+
+  [...]
+  11. Repeat, while k < actualDeleteCount
+    [...]
+    c. If fromPresent is true, then
+      [...]
+      ii. Perform ? CreateDataPropertyOrThrow(A, ! ToString(k), fromValue).
+  [...]
+
+  CreateDataPropertyOrThrow ( O, P, V )
+
+  [...]
+  3. Let success be ? CreateDataProperty(O, P, V).
+  4. If success is false, throw a TypeError exception.
+features: [Symbol.species]
+---*/
+
+var A = function(_length) {
+  Object.defineProperty(this, "0", {
+    writable: true,
+    configurable: false,
+  });
+};
+
+var arr = [1];
+arr.constructor = {};
+arr.constructor[Symbol.species] = A;
+
+assert.throws(TypeError, function() {
+  arr.splice(0);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/splice/target-array-with-non-writable-property.js b/js/src/tests/test262/built-ins/Array/prototype/splice/target-array-with-non-writable-property.js
new file mode 100644
index 0000000000..fe3a478fa3
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/splice/target-array-with-non-writable-property.js
@@ -0,0 +1,38 @@
+// Copyright (C) 2018 André Bargull. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.splice
+description: >
+  Non-writable properties are overwritten by CreateDataPropertyOrThrow.
+info: |
+  22.1.3.26 Array.prototype.splice ( start, deleteCount, ...items )
+
+  ...
+  11. Repeat, while k < actualDeleteCount
+    ...
+    c. If fromPresent is true, then
+      ...
+      ii. Perform ? CreateDataPropertyOrThrow(A, ! ToString(k), fromValue).
+    ...
+features: [Symbol.species]
+includes: [propertyHelper.js]
+---*/
+
+var a = [1];
+a.constructor = {};
+a.constructor[Symbol.species] = function(len) {
+    var q = new Array(0);
+    Object.defineProperty(q, 0, {
+        value: 0, writable: false, configurable: true, enumerable: false,
+    });
+    return q;
+};
+
+var r = a.splice(0);
+
+verifyProperty(r, 0, {
+    value: 1, writable: true, configurable: true, enumerable: true,
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/splice/throws-if-integer-limit-exceeded.js b/js/src/tests/test262/built-ins/Array/prototype/splice/throws-if-integer-limit-exceeded.js
new file mode 100644
index 0000000000..8e67a021b5
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/splice/throws-if-integer-limit-exceeded.js
@@ -0,0 +1,43 @@
+// Copyright (C) 2017 André Bargull. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.splice
+description: >
+  A TypeError is thrown if the new length exceeds 2^53-1.
+info: |
+  1. ...
+  2. Let len be ? ToLength(? Get(O, "length")).
+  ...
+  7. Else,
+    a. Let insertCount be the number of actual arguments minus 2.
+    b. Let dc be ? ToInteger(deleteCount).
+    c. Let actualDeleteCount be min(max(dc, 0), len - actualStart).
+  8. If len+insertCount-actualDeleteCount > 2^53-1, throw a TypeError exception.
+  ...
+features: [exponentiation]
+---*/
+
+var arrayLike = {};
+
+arrayLike.length = 2 ** 53 - 1;
+assert.throws(TypeError, function() {
+  Array.prototype.splice.call(arrayLike, 0, 0, null);
+}, "Length is 2**53 - 1");
+
+arrayLike.length = 2 ** 53;
+assert.throws(TypeError, function() {
+  Array.prototype.splice.call(arrayLike, 0, 0, null);
+}, "Length is 2**53");
+
+arrayLike.length = 2 ** 53 + 2;
+assert.throws(TypeError, function() {
+  Array.prototype.splice.call(arrayLike, 0, 0, null);
+}, "Length is 2**53 + 2");
+
+arrayLike.length = Infinity;
+assert.throws(TypeError, function() {
+  Array.prototype.splice.call(arrayLike, 0, 0, null);
+}, "Length is Infinity");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/toLocaleString/S15.4.4.3_A1_T1.js b/js/src/tests/test262/built-ins/Array/prototype/toLocaleString/S15.4.4.3_A1_T1.js
new file mode 100644
index 0000000000..1a068ed5ac
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/toLocaleString/S15.4.4.3_A1_T1.js
@@ -0,0 +1,28 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.tolocalestring
+info: |
+    The elements of the array are converted to strings using their
+    toLocaleString methods, and these strings are then concatenated, separated
+    by occurrences of a separator string that has been derived in an
+    implementation-defined locale-specific way
+es5id: 15.4.4.3_A1_T1
+description: it is the function that should be invoked
+---*/
+
+var n = 0;
+var obj = {
+  toLocaleString: function() {
+    n++
+  }
+};
+var arr = [undefined, obj, null, obj, obj];
+arr.toLocaleString();
+
+if (n !== 3) {
+  throw new Test262Error('#1: var n = 0; var obj = {toLocaleString: function() {n++}}; var arr = [undefined, obj, null, obj, obj]; arr.toLocaleString(); n === 3. Actual: ' + (n));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/toLocaleString/S15.4.4.3_A3_T1.js b/js/src/tests/test262/built-ins/Array/prototype/toLocaleString/S15.4.4.3_A3_T1.js
new file mode 100644
index 0000000000..a7f0796792
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/toLocaleString/S15.4.4.3_A3_T1.js
@@ -0,0 +1,25 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.tolocalestring
+info: "[[Get]] from not an inherited property"
+es5id: 15.4.4.3_A3_T1
+description: "[[Prototype]] of Array instance is Array.prototype"
+---*/
+
+var n = 0;
+var obj = {
+  toLocaleString: function() {
+    n++
+  }
+};
+Array.prototype[1] = obj;
+var x = [obj];
+x.length = 2;
+x.toLocaleString();
+if (n !== 2) {
+  throw new Test262Error('#1: var n = 0; var obj = {toLocaleString: function() {n++}}; Array.prototype[1] = obj; x = [obj]; x.length = 2; x.toLocaleString(); n === 2. Actual: ' + (n));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/toLocaleString/browser.js b/js/src/tests/test262/built-ins/Array/prototype/toLocaleString/browser.js
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/js/src/tests/test262/built-ins/Array/prototype/toLocaleString/invoke-element-tolocalestring.js b/js/src/tests/test262/built-ins/Array/prototype/toLocaleString/invoke-element-tolocalestring.js
new file mode 100644
index 0000000000..2ccde4cca4
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/toLocaleString/invoke-element-tolocalestring.js
@@ -0,0 +1,65 @@
+// Copyright (C) 2022 Richard Gibson. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.tolocalestring
+description: >
+    The toLocaleString method of each non-undefined non-null element
+    must be called with no arguments.
+info: |
+    Array.prototype.toLocaleString ( [ _reserved1_ [ , _reserved2_ ] ] )
+
+    4. Let _R_ be the empty String.
+    5. Let _k_ be 0.
+    6. Repeat, while _k_ &lt; _len_,
+      a. If _k_ &gt; 0, then
+        i. Set _R_ to the string-concatenation of _R_ and _separator_.
+      b. Let _nextElement_ be ? Get(_array_, ! ToString(_k_)).
+      c. If _nextElement_ is not *undefined* or *null*, then
+        i. Let _S_ be ? ToString(? Invoke(_nextElement_, *"toLocaleString"*)).
+        ii. Set _R_ to the string-concatenation of _R_ and _S_.
+      d. Increase _k_ by 1.
+    7. Return _R_.
+includes: [compareArray.js]
+---*/
+
+const unique = {
+  toString() {
+    return "<sentinel object>";
+  }
+};
+
+const testCases = [
+  { label: "no arguments", args: [] },
+  { label: "undefined locale", args: [undefined] },
+  { label: "string locale", args: ["ar"] },
+  { label: "object locale", args: [unique] },
+  { label: "undefined locale and options", args: [undefined, unique] },
+  { label: "string locale and options", args: ["zh", unique] },
+  { label: "object locale and options", args: [unique, unique] },
+  { label: "extra arguments", args: [unique, unique, unique] },
+];
+
+for (const { label, args } of testCases) {
+  assert.sameValue([undefined].toLocaleString(...args), "",
+    `must skip undefined elements when provided ${label}`);
+}
+for (const { label, args, expectedArgs } of testCases) {
+  assert.sameValue([null].toLocaleString(...args), "",
+    `must skip null elements when provided ${label}`);
+}
+
+if (typeof Intl !== "object") {
+  for (const { label, args } of testCases) {
+    const spy = {
+      toLocaleString(...receivedArgs) {
+        assert.compareArray(receivedArgs, [],
+          `must invoke element toLocaleString with no arguments when provided ${label}`);
+        return "ok";
+      }
+    };
+    assert.sameValue([spy].toLocaleString(...args), "ok");
+  }
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/toLocaleString/length.js b/js/src/tests/test262/built-ins/Array/prototype/toLocaleString/length.js
new file mode 100644
index 0000000000..bc24898e1e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/toLocaleString/length.js
@@ -0,0 +1,30 @@
+// Copyright (C) 2017 Leo Balter. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.tolocalestring
+description: >
+  The "length" property of Array.prototype.toLocaleString
+info: |
+  17 ECMAScript Standard Built-in Objects
+
+  Every built-in function object, including constructors, has a length property
+  whose value is an integer. Unless otherwise specified, this value is equal to
+  the largest number of named arguments shown in the subclause headings for the
+  function description. Optional parameters (which are indicated with brackets:
+  [ ]) or rest parameters (which are shown using the form «...name») are not
+  included in the default argument count.
+
+  Unless otherwise specified, the length property of a built-in function object
+  has the attributes { [[Writable]]: false, [[Enumerable]]: false,
+    [[Configurable]]: true }.
+includes: [propertyHelper.js]
+---*/
+
+assert.sameValue(Array.prototype.toLocaleString.length, 0);
+
+verifyNotEnumerable(Array.prototype.toLocaleString, 'length');
+verifyNotWritable(Array.prototype.toLocaleString, 'length');
+verifyConfigurable(Array.prototype.toLocaleString, 'length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/toLocaleString/name.js b/js/src/tests/test262/built-ins/Array/prototype/toLocaleString/name.js
new file mode 100644
index 0000000000..54f2c57bcb
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/toLocaleString/name.js
@@ -0,0 +1,28 @@
+// Copyright (C) 2015 André Bargull. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.tolocalestring
+description: >
+  Array.prototype.toLocaleString.name is "toLocaleString".
+info: |
+  Array.prototype.toLocaleString ( [ reserved1 [ , reserved2 ] ] )
+
+  17 ECMAScript Standard Built-in Objects:
+    Every built-in Function object, including constructors, that is not
+    identified as an anonymous function has a name property whose value
+    is a String.
+
+    Unless otherwise specified, the name property of a built-in Function
+    object, if it exists, has the attributes { [[Writable]]: false,
+    [[Enumerable]]: false, [[Configurable]]: true }.
+includes: [propertyHelper.js]
+---*/
+
+assert.sameValue(Array.prototype.toLocaleString.name, "toLocaleString");
+
+verifyNotEnumerable(Array.prototype.toLocaleString, "name");
+verifyNotWritable(Array.prototype.toLocaleString, "name");
+verifyConfigurable(Array.prototype.toLocaleString, "name");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/toLocaleString/not-a-constructor.js b/js/src/tests/test262/built-ins/Array/prototype/toLocaleString/not-a-constructor.js
new file mode 100644
index 0000000000..def6d25864
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/toLocaleString/not-a-constructor.js
@@ -0,0 +1,35 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Array.prototype.toLocaleString does not implement [[Construct]], is not new-able
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+
+  sec-evaluatenew
+
+  ...
+  7. If IsConstructor(constructor) is false, throw a TypeError exception.
+  ...
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Array.prototype.toLocaleString),
+  false,
+  'isConstructor(Array.prototype.toLocaleString) must return false'
+);
+
+assert.throws(TypeError, () => {
+  new Array.prototype.toLocaleString();
+}, '`new Array.prototype.toLocaleString()` throws TypeError');
+
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/toLocaleString/primitive_this_value-strict.js b/js/src/tests/test262/built-ins/Array/prototype/toLocaleString/primitive_this_value-strict.js
new file mode 100644
index 0000000000..4107ea1fcc
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/toLocaleString/primitive_this_value-strict.js
@@ -0,0 +1,33 @@
+'use strict';
+// Copyright (C) 2015 André Bargull. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.tolocalestring
+description: Array.prototype.toLocaleString called with primitive element
+info: |
+  22.1.3.26 Array.prototype.toLocaleString ( [ reserved1 [ , reserved2 ] ] )
+
+  ...
+  10. Else
+    a. Let R be ToString(Invoke(firstElement, "toLocaleString")).
+    b. ReturnIfAbrupt(R).
+  ...
+  12.
+    ...
+    e. Else
+      i.  Let R be ToString(Invoke(nextElement, "toLocaleString")).
+      ii. ReturnIfAbrupt(R).
+es6id: 22.1.3.26
+flags: [onlyStrict]
+---*/
+
+var listSeparator = ["", ""].toLocaleString();
+
+Boolean.prototype.toString = function() {
+  return typeof this;
+};
+
+assert.sameValue([true, false].toLocaleString(), ("boolean" + listSeparator + "boolean"));
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/toLocaleString/primitive_this_value_getter-strict.js b/js/src/tests/test262/built-ins/Array/prototype/toLocaleString/primitive_this_value_getter-strict.js
new file mode 100644
index 0000000000..1dd5009ef5
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/toLocaleString/primitive_this_value_getter-strict.js
@@ -0,0 +1,38 @@
+'use strict';
+// Copyright (C) 2015 André Bargull. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.tolocalestring
+description: Array.prototype.toLocaleString called with primitive element in getter
+info: |
+  22.1.3.26 Array.prototype.toLocaleString ( [ reserved1 [ , reserved2 ] ] )
+
+  ...
+  10. Else
+    a. Let R be ToString(Invoke(firstElement, "toLocaleString")).
+    b. ReturnIfAbrupt(R).
+  ...
+  12.
+    ...
+    e. Else
+      i.  Let R be ToString(Invoke(nextElement, "toLocaleString")).
+      ii. ReturnIfAbrupt(R).
+es6id: 22.1.3.26
+flags: [onlyStrict]
+---*/
+
+var listSeparator = ["", ""].toLocaleString();
+
+Object.defineProperty(Boolean.prototype, "toString", {
+  get: function() {
+    var v = typeof this;
+    return function() {
+      return v;
+    };
+  }
+});
+
+assert.sameValue([true, false].toLocaleString(), ("boolean" + listSeparator + "boolean"));
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/toLocaleString/prop-desc.js b/js/src/tests/test262/built-ins/Array/prototype/toLocaleString/prop-desc.js
new file mode 100644
index 0000000000..3cde82c748
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/toLocaleString/prop-desc.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2017 Leo Balter. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.tolocalestring
+description: >
+  "toLocaleString" property of Array.prototype
+info: |
+  17 ECMAScript Standard Built-in Objects
+  
+  Every other data property described in clauses 18 through 26 and in Annex B.2
+  has the attributes { [[Writable]]: true, [[Enumerable]]: false,
+    [[Configurable]]: true } unless otherwise specified.
+includes: [propertyHelper.js]
+---*/
+
+assert.sameValue(typeof Array.prototype.toLocaleString, 'function', 'typeof');
+
+verifyNotEnumerable(Array.prototype, "toLocaleString");
+verifyWritable(Array.prototype, "toLocaleString");
+verifyConfigurable(Array.prototype, "toLocaleString");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/toLocaleString/shell.js b/js/src/tests/test262/built-ins/Array/prototype/toLocaleString/shell.js
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/js/src/tests/test262/built-ins/Array/prototype/toReversed/browser.js b/js/src/tests/test262/built-ins/Array/prototype/toReversed/browser.js
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/js/src/tests/test262/built-ins/Array/prototype/toReversed/frozen-this-value.js b/js/src/tests/test262/built-ins/Array/prototype/toReversed/frozen-this-value.js
new file mode 100644
index 0000000000..e5c9bb380e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/toReversed/frozen-this-value.js
@@ -0,0 +1,20 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.toReversed
+description: >
+  Array.prototype.toReversed works on frozen objects
+features: [change-array-by-copy]
+includes: [compareArray.js]
+---*/
+
+var arr = Object.freeze([0, 1, 2]);
+var result = arr.toReversed();
+assert.compareArray(result, [2, 1, 0]);
+
+var arrayLike = Object.freeze({ length: 3, 0: 0, 1: 1, 2: 2 });
+result = Array.prototype.toReversed.call(arrayLike);
+assert.compareArray(result, [2, 1, 0]);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/toReversed/get-descending-order.js b/js/src/tests/test262/built-ins/Array/prototype/toReversed/get-descending-order.js
new file mode 100644
index 0000000000..81c46bf65a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/toReversed/get-descending-order.js
@@ -0,0 +1,51 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.toReversed
+description: >
+  Array.prototype.toReversed gets the array elements from the last one to the first one.
+info: |
+  Array.prototype.toReversed ( )
+
+  ...
+  2. Let len be ? LengthOfArrayLike(O).
+  ...
+  5. Repeat, while k < len
+    a. Let from be ! ToString(𝔽(len - k - 1)).
+    ...
+    c. Let fromValue be ? Get(O, from).
+    ...
+features: [change-array-by-copy]
+includes: [compareArray.js]
+---*/
+
+var order = [];
+var arrayLike = {
+  length: 3,
+  get 0() {
+    order.push(0);
+  },
+  get 1() {
+    order.push(1);
+  },
+  get 2() {
+    order.push(2);
+  },
+};
+
+Array.prototype.toReversed.call(arrayLike);
+
+assert.compareArray(order, [2, 1, 0]);
+
+order = [];
+var arr = [0, 1, 2];
+Object.defineProperty(arr, 0, { get: function() { order.push(0); } });
+Object.defineProperty(arr, 1, { get: function() { order.push(1); } });
+Object.defineProperty(arr, 2, { get: function() { order.push(2); } });
+
+Array.prototype.toReversed.call(arr);
+
+assert.compareArray(order, [2, 1, 0]);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/toReversed/holes-not-preserved.js b/js/src/tests/test262/built-ins/Array/prototype/toReversed/holes-not-preserved.js
new file mode 100644
index 0000000000..9e884f98c1
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/toReversed/holes-not-preserved.js
@@ -0,0 +1,31 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.toReversed
+description: >
+  Array.prototype.toReversed does not preserve holes in the array
+info: |
+  Array.prototype.toReversed ( )
+
+  ...
+  2. Let len be ? LengthOfArrayLike(O).
+  ...
+  5. Repeat, while k < len
+    a. Let from be ! ToString(𝔽(len - k - 1)).
+    ...
+    c. Let fromValue be ? Get(O, from).
+    d. Perform ? CreateDataPropertyOrThrow(A, Pk, fromValue).
+    ...
+features: [change-array-by-copy]
+includes: [compareArray.js]
+---*/
+
+var arr = [0, /* hole */, 2, /* hole */, 4];
+Array.prototype[3] = 3;
+
+var reversed = arr.toReversed();
+assert.compareArray(reversed, [4, 3, 2, undefined, 0]);
+assert(reversed.hasOwnProperty(3));
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/toReversed/ignores-species.js b/js/src/tests/test262/built-ins/Array/prototype/toReversed/ignores-species.js
new file mode 100644
index 0000000000..f4eab08eee
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/toReversed/ignores-species.js
@@ -0,0 +1,33 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.toReversed
+description: >
+  Array.prototype.toReversed ignores @@species
+info: |
+  Array.prototype.toReversed ( )
+
+  ...
+  3. Let A be ? ArrayCreate(𝔽(len)).
+  ...
+features: [change-array-by-copy]
+---*/
+
+var a = [];
+a.constructor = {};
+a.constructor[Symbol.species] = function () {}
+
+assert.sameValue(Object.getPrototypeOf(a.toReversed()), Array.prototype);
+
+var b = [];
+
+Object.defineProperty(b, "constructor", {
+  get() {
+    throw new Test262Error("Should not get .constructor");
+  }
+});
+
+b.toReversed();
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/toReversed/immutable.js b/js/src/tests/test262/built-ins/Array/prototype/toReversed/immutable.js
new file mode 100644
index 0000000000..ddc1fe1d48
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/toReversed/immutable.js
@@ -0,0 +1,18 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.toReversed
+description: >
+  Array.prototype.toReversed does not mutate its this value
+features: [change-array-by-copy]
+includes: [compareArray.js]
+---*/
+
+var arr = [0, 1, 2];
+arr.toReversed();
+
+assert.compareArray(arr, [0, 1, 2]);
+assert.notSameValue(arr.toReversed(), arr);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/toReversed/length-casted-to-zero.js b/js/src/tests/test262/built-ins/Array/prototype/toReversed/length-casted-to-zero.js
new file mode 100644
index 0000000000..292c9ea810
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/toReversed/length-casted-to-zero.js
@@ -0,0 +1,22 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.toReversed
+description: >
+  Array.prototype.toReversed creates an empty array if the this value .length is not a positive integer.
+info: |
+  Array.prototype.toReversed ( )
+
+  ...
+  2. Let len be ? LengthOfArrayLike(O).
+  ...
+features: [change-array-by-copy]
+includes: [compareArray.js]
+---*/
+
+assert.compareArray(Array.prototype.toReversed.call({ length: -2 }), []);
+assert.compareArray(Array.prototype.toReversed.call({ length: "dog" }), []);
+assert.compareArray(Array.prototype.toReversed.call({ length: NaN }), []);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/toReversed/length-decreased-while-iterating.js b/js/src/tests/test262/built-ins/Array/prototype/toReversed/length-decreased-while-iterating.js
new file mode 100644
index 0000000000..9d0e7f301c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/toReversed/length-decreased-while-iterating.js
@@ -0,0 +1,34 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.toReversed
+description: >
+  Array.prototype.toReversed caches the length getting the array elements.
+info: |
+  Array.prototype.toReversed ( )
+
+  ...
+  2. Let len be ? LengthOfArrayLike(O).
+  ...
+  5. Repeat, while k < len
+    ...
+    c. Let fromValue be ? Get(O, from).
+    ...
+features: [change-array-by-copy]
+includes: [compareArray.js]
+---*/
+
+var arr = [0, 1, 2, 3, 4];
+Array.prototype[1] = 5;
+
+Object.defineProperty(arr, "3", {
+  get() {
+    arr.length = 1;
+    return 3;
+  }
+});
+
+assert.compareArray(arr.toReversed(), [4, 3, undefined, 5, 0]);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/toReversed/length-exceeding-array-length-limit.js b/js/src/tests/test262/built-ins/Array/prototype/toReversed/length-exceeding-array-length-limit.js
new file mode 100644
index 0000000000..ec74266b19
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/toReversed/length-exceeding-array-length-limit.js
@@ -0,0 +1,40 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.toReversed
+description: >
+  Array.prototype.toReversed limits the length to 2 ** 32 - 1
+info: |
+  Array.prototype.toReversed ( )
+
+  ...
+  2. Let len be ? LengthOfArrayLike(O).
+  3. Let A be ? ArrayCreate(𝔽(len)).
+  ...
+
+  ArrayCreate ( length [, proto ] )
+
+  1. If length > 2 ** 32 - 1, throw a RangeError exception.
+features: [change-array-by-copy, exponentiation]
+---*/
+
+// Object with large "length" property
+var arrayLike = {
+  get "0"() {
+    throw new Test262Error("Get 0");
+  },
+  get "4294967295" () { // 2 ** 32 - 1
+    throw new Test262Error("Get 2147483648");
+  },
+  get "4294967296" () { // 2 ** 32
+    throw new Test262Error("Get 2147483648");
+  },
+  length: 2 ** 32
+};
+
+assert.throws(RangeError, function() {
+  Array.prototype.toReversed.call(arrayLike);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/toReversed/length-increased-while-iterating.js b/js/src/tests/test262/built-ins/Array/prototype/toReversed/length-increased-while-iterating.js
new file mode 100644
index 0000000000..90c87de7d0
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/toReversed/length-increased-while-iterating.js
@@ -0,0 +1,32 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.toReversed
+description: >
+  Array.prototype.toReversed caches the length getting the array elements.
+info: |
+  Array.prototype.toReversed ( )
+
+  ...
+  2. Let len be ? LengthOfArrayLike(O).
+  ...
+  5. Repeat, while k < len
+    ...
+    c. Let fromValue be ? Get(O, from).
+    ...
+features: [change-array-by-copy]
+includes: [compareArray.js]
+---*/
+
+var arr = [0, 1, 2];
+Object.defineProperty(arr, "0", {
+  get() {
+    arr.push(4);
+    return 0;
+  }
+});
+
+assert.compareArray(arr.toReversed(), [2, 1, 0]);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/toReversed/length-tolength.js b/js/src/tests/test262/built-ins/Array/prototype/toReversed/length-tolength.js
new file mode 100644
index 0000000000..ab49445ce8
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/toReversed/length-tolength.js
@@ -0,0 +1,31 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.toReversed
+description: >
+  Array.prototype.toReversed converts the this value length to a number.
+info: |
+  Array.prototype.toReversed ( )
+
+  ...
+  2. Let len be ? LengthOfArrayLike(O).
+  ...
+features: [change-array-by-copy]
+includes: [compareArray.js]
+---*/
+
+assert.compareArray(Array.prototype.toReversed.call({ length: "2", 0: 1, 1: 2, 2: 3 }), [2, 1]);
+
+var arrayLike = {
+  length: {
+    valueOf: () => 2
+  },
+  0: 1,
+  1: 2,
+  2: 3,
+};
+
+assert.compareArray(Array.prototype.toReversed.call(arrayLike), [2, 1]);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/toReversed/metadata/browser.js b/js/src/tests/test262/built-ins/Array/prototype/toReversed/metadata/browser.js
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/js/src/tests/test262/built-ins/Array/prototype/toReversed/metadata/length.js b/js/src/tests/test262/built-ins/Array/prototype/toReversed/metadata/length.js
new file mode 100644
index 0000000000..c86c003c02
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/toReversed/metadata/length.js
@@ -0,0 +1,32 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.toReversed
+description: >
+  The "length" property of Array.prototype.toReversed
+info: |
+  17 ECMAScript Standard Built-in Objects
+
+  Every built-in function object, including constructors, has a length property
+  whose value is an integer. Unless otherwise specified, this value is equal to
+  the largest number of named arguments shown in the subclause headings for the
+  function description. Optional parameters (which are indicated with brackets:
+  [ ]) or rest parameters (which are shown using the form «...name») are not
+  included in the default argument count.
+
+  Unless otherwise specified, the length property of a built-in function object
+  has the attributes { [[Writable]]: false, [[Enumerable]]: false,
+    [[Configurable]]: true }.
+includes: [propertyHelper.js]
+features: [change-array-by-copy]
+---*/
+
+verifyProperty(Array.prototype.toReversed, "length", {
+  value: 0,
+  writable: false,
+  enumerable: false,
+  configurable: true,
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/toReversed/metadata/name.js b/js/src/tests/test262/built-ins/Array/prototype/toReversed/metadata/name.js
new file mode 100644
index 0000000000..e882061d66
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/toReversed/metadata/name.js
@@ -0,0 +1,30 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.toReversed
+description: >
+  Array.prototype.toReversed.name is "toReversed".
+info: |
+  Array.prototype.toReversed ( )
+
+  17 ECMAScript Standard Built-in Objects:
+    Every built-in Function object, including constructors, that is not
+    identified as an anonymous function has a name property whose value
+    is a String.
+
+    Unless otherwise specified, the name property of a built-in Function
+    object, if it exists, has the attributes { [[Writable]]: false,
+    [[Enumerable]]: false, [[Configurable]]: true }.
+includes: [propertyHelper.js]
+features: [change-array-by-copy]
+---*/
+
+verifyProperty(Array.prototype.toReversed, "name", {
+  value: "toReversed",
+  writable: false,
+  enumerable: false,
+  configurable: true,
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/toReversed/metadata/property-descriptor.js b/js/src/tests/test262/built-ins/Array/prototype/toReversed/metadata/property-descriptor.js
new file mode 100644
index 0000000000..63f38569c7
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/toReversed/metadata/property-descriptor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.toReversed
+description: >
+  "toReversed" property of Array.prototype
+info: |
+  17 ECMAScript Standard Built-in Objects
+
+  Every other data property described in clauses 18 through 26 and in Annex B.2
+  has the attributes { [[Writable]]: true, [[Enumerable]]: false,
+    [[Configurable]]: true } unless otherwise specified.
+includes: [propertyHelper.js]
+features: [change-array-by-copy]
+---*/
+
+assert.sameValue(typeof Array.prototype.toReversed, "function", "typeof");
+
+verifyProperty(Array.prototype, "toReversed", {
+  value: Array.prototype.toReversed,
+  writable: true,
+  enumerable: false,
+  configurable: true,
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/toReversed/metadata/shell.js b/js/src/tests/test262/built-ins/Array/prototype/toReversed/metadata/shell.js
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/js/src/tests/test262/built-ins/Array/prototype/toReversed/not-a-constructor.js b/js/src/tests/test262/built-ins/Array/prototype/toReversed/not-a-constructor.js
new file mode 100644
index 0000000000..6e848442c9
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/toReversed/not-a-constructor.js
@@ -0,0 +1,35 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Array.prototype.toReversed does not implement [[Construct]], is not new-able
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+
+  sec-evaluatenew
+
+  ...
+  7. If IsConstructor(constructor) is false, throw a TypeError exception.
+  ...
+includes: [isConstructor.js]
+features: [change-array-by-copy, Reflect.construct]
+---*/
+
+assert.sameValue(
+  isConstructor(Array.prototype.toReversed),
+  false,
+  'isConstructor(Array.prototype.toReversed) must return false'
+);
+
+assert.throws(TypeError, () => {
+  new Array.prototype.toReversed();
+}, '`new Array.prototype.toReversed()` throws TypeError');
+
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/toReversed/shell.js b/js/src/tests/test262/built-ins/Array/prototype/toReversed/shell.js
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/js/src/tests/test262/built-ins/Array/prototype/toReversed/this-value-boolean.js b/js/src/tests/test262/built-ins/Array/prototype/toReversed/this-value-boolean.js
new file mode 100644
index 0000000000..b91cffbec9
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/toReversed/this-value-boolean.js
@@ -0,0 +1,31 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.toReversed
+description: >
+  Array.prototype.toReversed converts booleans to objects
+info: |
+  Array.prototype.toReversed ( )
+
+  1. Let O be ? ToObject(this value).
+  2. Let len be ? LengthOfArrayLike(O).
+  ...
+features: [change-array-by-copy]
+includes: [compareArray.js]
+---*/
+
+assert.compareArray(Array.prototype.toReversed.call(true), []);
+assert.compareArray(Array.prototype.toReversed.call(false), []);
+
+/* Add length and indexed properties to `Boolean.prototype` */
+Boolean.prototype.length = 3;
+assert.compareArray(Array.prototype.toReversed.call(true), [undefined, undefined, undefined]);
+assert.compareArray(Array.prototype.toReversed.call(false), [undefined, undefined, undefined]);
+delete Boolean.prototype.length;
+Boolean.prototype[0] = "monkeys";
+Boolean.prototype[2] = "bogus";
+assert.compareArray(Array.prototype.toReversed.call(true), []);
+assert.compareArray(Array.prototype.toReversed.call(false), []);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/toReversed/this-value-nullish.js b/js/src/tests/test262/built-ins/Array/prototype/toReversed/this-value-nullish.js
new file mode 100644
index 0000000000..682b28addf
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/toReversed/this-value-nullish.js
@@ -0,0 +1,24 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.toReversed
+description: >
+  Array.prototype.toReversed throws if the receiver is null or undefined
+info: |
+  Array.prototype.toReversed ( )
+
+  1. Let O be ? ToObject(this value).
+  ...
+features: [change-array-by-copy]
+---*/
+
+assert.throws(TypeError, () => {
+  Array.prototype.toReversed.call(null);
+}, '`Array.prototype.toReversed.call(null)` throws TypeError');
+
+assert.throws(TypeError, () => {
+  Array.prototype.toReversed.call(undefined);
+}, '`Array.prototype.toReversed.call(undefined)` throws TypeError');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/toReversed/zero-or-one-element.js b/js/src/tests/test262/built-ins/Array/prototype/toReversed/zero-or-one-element.js
new file mode 100644
index 0000000000..863dffa761
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/toReversed/zero-or-one-element.js
@@ -0,0 +1,22 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.toReversed
+description: >
+  Array.prototype.toReversed returns a new array even if it has zero or one elements
+features: [change-array-by-copy]
+includes: [compareArray.js]
+---*/
+
+var zero = [];
+var zeroReversed = zero.toReversed();
+assert.notSameValue(zero, zeroReversed);
+assert.compareArray(zero, zeroReversed);
+
+var one = [1];
+var oneReversed = one.toReversed();
+assert.notSameValue(one, oneReversed);
+assert.compareArray(one, oneReversed);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/toSorted/browser.js b/js/src/tests/test262/built-ins/Array/prototype/toSorted/browser.js
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/js/src/tests/test262/built-ins/Array/prototype/toSorted/comparefn-called-after-get-elements.js b/js/src/tests/test262/built-ins/Array/prototype/toSorted/comparefn-called-after-get-elements.js
new file mode 100644
index 0000000000..41f7db3663
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/toSorted/comparefn-called-after-get-elements.js
@@ -0,0 +1,45 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.toSorted
+description: >
+  Array.prototype.toSorted reads all the array elements before calling compareFn
+info: |
+  SortIndexedProperties ( obj, len, SortCompare, skipHoles )
+
+  ...
+  3. Repeat, while k < len,
+    a. Let Pk be ! ToString(𝔽(k)).
+    ...
+      i. Let kValue be ? Get(O, Pk).
+    ...
+  4. Sort items using an implementation-defined sequence of
+     calls to SortCompare. If any such call returns an abrupt
+     completion, stop before performing any further calls to
+     SortCompare or steps in this algorithm and return that
+     Completion Record.
+  ...
+features: [change-array-by-copy]
+includes: [compareArray.js]
+---*/
+
+var getCalls = [];
+
+var arrayLike = {
+  length: 3,
+  get 0() { getCalls.push(0); return 2; },
+  get 1() { getCalls.push(1); return 1; },
+  get 2() { getCalls.push(2); return 3; },
+
+}
+
+assert.throws(Test262Error, function() {
+  Array.prototype.toSorted.call(arrayLike, () => {
+    throw new Test262Error();
+  });
+});
+
+assert.compareArray(getCalls, [0, 1, 2]);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/toSorted/comparefn-not-a-function.js b/js/src/tests/test262/built-ins/Array/prototype/toSorted/comparefn-not-a-function.js
new file mode 100644
index 0000000000..3a3e64627e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/toSorted/comparefn-not-a-function.js
@@ -0,0 +1,35 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.toSorted
+description: >
+  Array.prototype.toSorted verifies that the comparator is callable before reading the length.
+info: |
+  Array.prototype.toSorted ( compareFn )
+
+  1. If comparefn is not undefined and IsCallable(comparefn) is false, throw a TypeError exception.
+  2. ...
+  3. Let len be ? LengthOfArrayLike(O).
+features: [change-array-by-copy]
+---*/
+
+var getLengthThrow = {
+  get length() {
+    throw new Test262Error("IsCallable(comparefn) should be observed before this.length");
+  }
+};
+
+var invalidComparators = [null, true, false, "", /a/g, 42, 42n, [], {}, Symbol()];
+
+for (var i = 0; i < invalidComparators.length; i++) {
+  assert.throws(TypeError, function() {
+    [1].toSorted(invalidComparators[i]);
+  }, String(invalidComparators[i]) + " on an array");
+
+  assert.throws(TypeError, function() {
+    Array.prototype.toSorted.call(getLengthThrow, invalidComparators[i]);
+  }, String(invalidComparators[i]) + " on an object whose 'length' throws");
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/toSorted/comparefn-stop-after-error.js b/js/src/tests/test262/built-ins/Array/prototype/toSorted/comparefn-stop-after-error.js
new file mode 100644
index 0000000000..6b36b3dccf
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/toSorted/comparefn-stop-after-error.js
@@ -0,0 +1,44 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.toSorted
+description: >
+  Array.prototype.toSorted doesn't call compareFn if there is an error
+info: |
+  Array.prototype.toSorted ( compareFn )
+
+  ...
+  7. Sort items using an implementation-defined sequence of
+     calls to SortCompare. If any such call returns an abrupt
+     completion, stop before performing any further calls to
+     SortCompare or steps in this algorithm and return that completion.
+  ...
+features: [change-array-by-copy]
+---*/
+
+var arrayLike = {
+  length: 1,
+  get 0() { throw new Test262Error(); },
+};
+
+var called = false;
+assert.throws(Test262Error, function() {
+  Array.prototype.toSorted.call(arrayLike, () => {
+    called = true;
+  });
+});
+assert.sameValue(called, false);
+
+called = 0;
+assert.throws(Test262Error, function() {
+  [1, 2, 3].toSorted(() => {
+    ++called;
+    if (called === 1) {
+      throw new Test262Error();
+    }
+  });
+});
+assert.sameValue(called, 1);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/toSorted/frozen-this-value.js b/js/src/tests/test262/built-ins/Array/prototype/toSorted/frozen-this-value.js
new file mode 100644
index 0000000000..0e4767e598
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/toSorted/frozen-this-value.js
@@ -0,0 +1,20 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.toSorted
+description: >
+  Array.prototype.toSorted works on frozen objects
+features: [change-array-by-copy]
+includes: [compareArray.js]
+---*/
+
+var arr = Object.freeze([2, 0, 1]);
+var result = arr.toSorted();
+assert.compareArray(result, [0, 1, 2]);
+
+var arrayLike = Object.freeze({ length: 3, 0: 2, 1: 0, 2: 1 });
+result = Array.prototype.toSorted.call(arrayLike);
+assert.compareArray(result, [0, 1, 2]);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/toSorted/holes-not-preserved.js b/js/src/tests/test262/built-ins/Array/prototype/toSorted/holes-not-preserved.js
new file mode 100644
index 0000000000..1a88422f0d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/toSorted/holes-not-preserved.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.toSorted
+description: >
+  Array.prototype.toSorted does not preserve holes in the array
+info: |
+  Array.prototype.toSorted ( compareFn )
+
+  ...
+  8. Repeat, while j < len,
+    a. Perform ! CreateDataPropertyOrThrow(A, ! ToString(𝔽(j)), sortedList[j]).
+    b. Set j to j + 1.
+  ...
+features: [change-array-by-copy]
+includes: [compareArray.js]
+---*/
+
+var arr = [3, /* hole */, 4, /* hole */, 1];
+Array.prototype[3] = 2;
+
+var sorted = arr.toSorted();
+assert.compareArray(sorted, [1, 2, 3, 4, undefined]);
+assert(sorted.hasOwnProperty(4));
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/toSorted/ignores-species.js b/js/src/tests/test262/built-ins/Array/prototype/toSorted/ignores-species.js
new file mode 100644
index 0000000000..78c9656550
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/toSorted/ignores-species.js
@@ -0,0 +1,32 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.toSorted
+description: >
+  Array.prototype.toSorted ignores @@species
+info: |
+  Array.prototype.toSorted ( compareFn )
+
+  ...
+  8. Let A be ? ArrayCreate(𝔽(len)).
+  ...
+features: [change-array-by-copy]
+---*/
+
+var a = [];
+a.constructor = {};
+a.constructor[Symbol.species] = function () {}
+
+assert.sameValue(Object.getPrototypeOf(a.toSorted()), Array.prototype);
+
+var b = [];
+Object.defineProperty(b, "constructor", {
+  get() {
+    throw new Test262Error("Should not get .constructor");
+  }
+});
+
+b.toSorted();
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/toSorted/immutable.js b/js/src/tests/test262/built-ins/Array/prototype/toSorted/immutable.js
new file mode 100644
index 0000000000..2fb611d109
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/toSorted/immutable.js
@@ -0,0 +1,18 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.toSorted
+description: >
+  Array.prototype.toSorted does not mutate its this value
+features: [change-array-by-copy]
+includes: [compareArray.js]
+---*/
+
+var arr = [2, 0, 1];
+arr.toSorted();
+
+assert.compareArray(arr, [2, 0, 1]);
+assert.notSameValue(arr.toSorted(), arr);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/toSorted/length-casted-to-zero.js b/js/src/tests/test262/built-ins/Array/prototype/toSorted/length-casted-to-zero.js
new file mode 100644
index 0000000000..c058ba8d8c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/toSorted/length-casted-to-zero.js
@@ -0,0 +1,22 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.toSorted
+description: >
+  Array.prototype.toSorted creates an empty array if the this value .length is not a positive integer.
+info: |
+  Array.prototype.toSorted ( compareFn )
+
+  ...
+  3. Let len be ? LengthOfArrayLike(O).
+  ...
+features: [change-array-by-copy]
+includes: [compareArray.js]
+---*/
+
+assert.compareArray(Array.prototype.toSorted.call({ length: -2 }), []);
+assert.compareArray(Array.prototype.toSorted.call({ length: "dog" }), []);
+assert.compareArray(Array.prototype.toSorted.call({ length: NaN }), []);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/toSorted/length-decreased-while-iterating.js b/js/src/tests/test262/built-ins/Array/prototype/toSorted/length-decreased-while-iterating.js
new file mode 100644
index 0000000000..ce48724aa9
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/toSorted/length-decreased-while-iterating.js
@@ -0,0 +1,33 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.toSorted
+description: >
+  Array.prototype.toSorted caches the length getting the array elements.
+info: |
+  Array.prototype.toSorted ( compareFn )
+
+  ...
+  3. Let len be ? LengthOfArrayLike(O).
+  ...
+  6. Let sortedList be ? SortIndexedProperties(obj, len, SortCompare, false).
+  ...
+
+features: [change-array-by-copy]
+includes: [compareArray.js]
+---*/
+
+var arr = [5, 1, 4, 6, 3];
+Array.prototype[3] = 2;
+
+Object.defineProperty(arr, "2", {
+  get() {
+    arr.length = 1;
+    return 4;
+  }
+});
+
+assert.compareArray(arr.toSorted(), [1, 2, 4, 5, undefined]);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/toSorted/length-exceeding-array-length-limit.js b/js/src/tests/test262/built-ins/Array/prototype/toSorted/length-exceeding-array-length-limit.js
new file mode 100644
index 0000000000..a6619963f4
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/toSorted/length-exceeding-array-length-limit.js
@@ -0,0 +1,41 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.toSorted
+description: >
+  Array.prototype.toSorted limits the length to 2 ** 32 - 1
+info: |
+  Array.prototype.toSorted ( compareFn )
+
+  ...
+  3. Let len be ? LengthOfArrayLike(O).
+  ...
+  8. Let A be ? ArrayCreate(𝔽(len)).
+  ...
+
+  ArrayCreate ( length [, proto ] )
+
+  1. If length > 2 ** 32 - 1, throw a RangeError exception.
+features: [change-array-by-copy, exponentiation]
+---*/
+
+// Object with large "length" property
+var arrayLike = {
+  get "0"() {
+    throw new Test262Error("Get 0");
+  },
+  get "4294967295" () { // 2 ** 32 - 1
+    throw new Test262Error("Get 2147483648");
+  },
+  get "4294967296" () { // 2 ** 32
+    throw new Test262Error("Get 2147483648");
+  },
+  length: 2 ** 32
+};
+
+assert.throws(RangeError, function() {
+  Array.prototype.toSorted.call(arrayLike);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/toSorted/length-increased-while-iterating.js b/js/src/tests/test262/built-ins/Array/prototype/toSorted/length-increased-while-iterating.js
new file mode 100644
index 0000000000..2843d92f54
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/toSorted/length-increased-while-iterating.js
@@ -0,0 +1,31 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.toSorted
+description: >
+  Array.prototype.toSorted caches the length getting the array elements.
+info: |
+  Array.prototype.toSorted ( compareFn )
+
+  ...
+  3. Let len be ? LengthOfArrayLike(O).
+  ...
+  6. Let sortedList be ? SortIndexedProperties(obj, len, SortCompare, false).
+  ...
+
+features: [change-array-by-copy]
+includes: [compareArray.js]
+---*/
+
+var arr = [5, 0, 3];
+Object.defineProperty(arr, "0", {
+  get() {
+    arr.push(1);
+    return 5;
+  }
+});
+
+assert.compareArray(arr.toSorted(), [0, 3, 5]);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/toSorted/length-tolength.js b/js/src/tests/test262/built-ins/Array/prototype/toSorted/length-tolength.js
new file mode 100644
index 0000000000..4e6344428d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/toSorted/length-tolength.js
@@ -0,0 +1,31 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.toSorted
+description: >
+  Array.prototype.toSorted converts the this value length to a number.
+info: |
+  Array.prototype.toSorted ( compareFn )
+
+  ...
+  3. Let len be ? LengthOfArrayLike(O).
+  ...
+features: [change-array-by-copy]
+includes: [compareArray.js]
+---*/
+
+assert.compareArray(Array.prototype.toSorted.call({ length: "2", 0: 4, 1: 0, 2: 1 }), [0, 4]);
+
+var arrayLike = {
+  length: {
+    valueOf: () => 2
+  },
+  0: 4,
+  1: 0,
+  2: 1,
+};
+
+assert.compareArray(Array.prototype.toSorted.call(arrayLike), [0, 4]);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/toSorted/metadata/browser.js b/js/src/tests/test262/built-ins/Array/prototype/toSorted/metadata/browser.js
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/js/src/tests/test262/built-ins/Array/prototype/toSorted/metadata/length.js b/js/src/tests/test262/built-ins/Array/prototype/toSorted/metadata/length.js
new file mode 100644
index 0000000000..196bf5b3b1
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/toSorted/metadata/length.js
@@ -0,0 +1,32 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.toSorted
+description: >
+  The "length" property of Array.prototype.toSorted
+info: |
+  17 ECMAScript Standard Built-in Objects
+
+  Every built-in function object, including constructors, has a length property
+  whose value is an integer. Unless otherwise specified, this value is equal to
+  the largest number of named arguments shown in the subclause headings for the
+  function description. Optional parameters (which are indicated with brackets:
+  [ ]) or rest parameters (which are shown using the form «...name») are not
+  included in the default argument count.
+
+  Unless otherwise specified, the length property of a built-in function object
+  has the attributes { [[Writable]]: false, [[Enumerable]]: false,
+    [[Configurable]]: true }.
+includes: [propertyHelper.js]
+features: [change-array-by-copy]
+---*/
+
+verifyProperty(Array.prototype.toSorted, "length", {
+  value: 1,
+  writable: false,
+  enumerable: false,
+  configurable: true,
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/toSorted/metadata/name.js b/js/src/tests/test262/built-ins/Array/prototype/toSorted/metadata/name.js
new file mode 100644
index 0000000000..f2d7a8bf68
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/toSorted/metadata/name.js
@@ -0,0 +1,30 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.toSorted
+description: >
+  Array.prototype.toSorted.name is "toSorted".
+info: |
+  Array.prototype.toSorted ( compareFn )
+
+  17 ECMAScript Standard Built-in Objects:
+    Every built-in Function object, including constructors, that is not
+    identified as an anonymous function has a name property whose value
+    is a String.
+
+    Unless otherwise specified, the name property of a built-in Function
+    object, if it exists, has the attributes { [[Writable]]: false,
+    [[Enumerable]]: false, [[Configurable]]: true }.
+includes: [propertyHelper.js]
+features: [change-array-by-copy]
+---*/
+
+verifyProperty(Array.prototype.toSorted, "name", {
+  value: "toSorted",
+  writable: false,
+  enumerable: false,
+  configurable: true,
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/toSorted/metadata/property-descriptor.js b/js/src/tests/test262/built-ins/Array/prototype/toSorted/metadata/property-descriptor.js
new file mode 100644
index 0000000000..cc58c83d0f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/toSorted/metadata/property-descriptor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.toSorted
+description: >
+  "toSorted" property of Array.prototype
+info: |
+  17 ECMAScript Standard Built-in Objects
+
+  Every other data property described in clauses 18 through 26 and in Annex B.2
+  has the attributes { [[Writable]]: true, [[Enumerable]]: false,
+    [[Configurable]]: true } unless otherwise specified.
+includes: [propertyHelper.js]
+features: [change-array-by-copy]
+---*/
+
+assert.sameValue(typeof Array.prototype.toSorted, "function", "typeof");
+
+verifyProperty(Array.prototype, "toSorted", {
+  value: Array.prototype.toSorted,
+  writable: true,
+  enumerable: false,
+  configurable: true,
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/toSorted/metadata/shell.js b/js/src/tests/test262/built-ins/Array/prototype/toSorted/metadata/shell.js
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/js/src/tests/test262/built-ins/Array/prototype/toSorted/not-a-constructor.js b/js/src/tests/test262/built-ins/Array/prototype/toSorted/not-a-constructor.js
new file mode 100644
index 0000000000..dda671c3ee
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/toSorted/not-a-constructor.js
@@ -0,0 +1,35 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Array.prototype.toSorted does not implement [[Construct]], is not new-able
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+
+  sec-evaluatenew
+
+  ...
+  7. If IsConstructor(constructor) is false, throw a TypeError exception.
+  ...
+includes: [isConstructor.js]
+features: [change-array-by-copy, Reflect.construct]
+---*/
+
+assert.sameValue(
+  isConstructor(Array.prototype.toSorted),
+  false,
+  'isConstructor(Array.prototype.toSorted) must return false'
+);
+
+assert.throws(TypeError, () => {
+  new Array.prototype.toSorted();
+}, '`new Array.prototype.toSorted()` throws TypeError');
+
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/toSorted/shell.js b/js/src/tests/test262/built-ins/Array/prototype/toSorted/shell.js
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/js/src/tests/test262/built-ins/Array/prototype/toSorted/this-value-boolean.js b/js/src/tests/test262/built-ins/Array/prototype/toSorted/this-value-boolean.js
new file mode 100644
index 0000000000..323b8df9f5
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/toSorted/this-value-boolean.js
@@ -0,0 +1,32 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.toSorted
+description: >
+  Array.prototype.toSorted converts booleans to objects
+info: |
+  Array.prototype.toSorted ( compareFn )
+
+  1. Let O be ? ToObject(this value).
+  2. Let len be ? LengthOfArrayLike(O).
+  ...
+features: [change-array-by-copy]
+includes: [compareArray.js]
+---*/
+
+assert.compareArray(Array.prototype.toSorted.call(true), []);
+assert.compareArray(Array.prototype.toSorted.call(false), []);
+
+
+/* Add length and indexed properties to `Boolean.prototype` */
+Boolean.prototype.length = 3;
+assert.compareArray(Array.prototype.toSorted.call(true), [undefined, undefined, undefined]);
+assert.compareArray(Array.prototype.toSorted.call(false), [undefined, undefined, undefined]);
+delete Boolean.prototype.length;
+Boolean.prototype[0] = "monkeys";
+Boolean.prototype[2] = "bogus";
+assert.compareArray(Array.prototype.toSorted.call(true), []);
+assert.compareArray(Array.prototype.toSorted.call(false), []);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/toSorted/this-value-nullish.js b/js/src/tests/test262/built-ins/Array/prototype/toSorted/this-value-nullish.js
new file mode 100644
index 0000000000..65690075df
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/toSorted/this-value-nullish.js
@@ -0,0 +1,24 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.toSorted
+description: >
+  Array.prototype.toSorted throws if the receiver is null or undefined
+info: |
+  Array.prototype.toSorted ( compareFn )
+
+  1. Let O be ? ToObject(this value).
+  ...
+features: [change-array-by-copy]
+---*/
+
+assert.throws(TypeError, () => {
+  Array.prototype.toSorted.call(null);
+}, '`Array.prototype.toSorted.call(null)` throws TypeError');
+
+assert.throws(TypeError, () => {
+  Array.prototype.toSorted.call(undefined);
+}, '`Array.prototype.toSorted.call(undefined)` throws TypeError');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/toSorted/zero-or-one-element.js b/js/src/tests/test262/built-ins/Array/prototype/toSorted/zero-or-one-element.js
new file mode 100644
index 0000000000..42026d538f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/toSorted/zero-or-one-element.js
@@ -0,0 +1,22 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.toSorted
+description: >
+  Array.prototype.toSorted returns a new array even if it has zero or one elements
+features: [change-array-by-copy]
+includes: [compareArray.js]
+---*/
+
+var zero = [];
+var zeroReversed = zero.toSorted();
+assert.notSameValue(zero, zeroReversed);
+assert.compareArray(zero, zeroReversed);
+
+var one = [1];
+var oneReversed = one.toSorted();
+assert.notSameValue(one, oneReversed);
+assert.compareArray(one, oneReversed);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/toSpliced/browser.js b/js/src/tests/test262/built-ins/Array/prototype/toSpliced/browser.js
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/js/src/tests/test262/built-ins/Array/prototype/toSpliced/deleteCount-clamped-between-zero-and-remaining-count.js b/js/src/tests/test262/built-ins/Array/prototype/toSpliced/deleteCount-clamped-between-zero-and-remaining-count.js
new file mode 100644
index 0000000000..7cc84733e2
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/toSpliced/deleteCount-clamped-between-zero-and-remaining-count.js
@@ -0,0 +1,39 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.toSpliced
+description: deleteCount is clamped between zero and len - actualStart
+info: |
+  22.1.3.25 Array.prototype.toSpliced (start, deleteCount , ...items )
+
+  ...
+  10. Else,
+    a. Let dc be ? ToIntegerOrInfinity(deleteCount).
+    b. Let actualDeleteCount be the result of clamping dc between 0 and len - actualStart.
+  ...
+features: [change-array-by-copy]
+includes: [compareArray.js]
+---*/
+
+assert.compareArray(
+  [0, 1, 2, 3, 4, 5].toSpliced(2, -1),
+  [0, 1, 2, 3, 4, 5]
+);
+
+assert.compareArray(
+  [0, 1, 2, 3, 4, 5].toSpliced(-4, -1),
+  [0, 1, 2, 3, 4, 5]
+);
+
+assert.compareArray(
+  [0, 1, 2, 3, 4, 5].toSpliced(2, 6),
+  [0, 1]
+);
+
+assert.compareArray(
+  [0, 1, 2, 3, 4, 5].toSpliced(-4, 6),
+  [0, 1]
+);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/toSpliced/deleteCount-missing.js b/js/src/tests/test262/built-ins/Array/prototype/toSpliced/deleteCount-missing.js
new file mode 100644
index 0000000000..6e0903c21d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/toSpliced/deleteCount-missing.js
@@ -0,0 +1,22 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.toSpliced
+description: Array.prototype.toSpliced deletes the elements after start when called with one argument
+info: |
+  22.1.3.25 Array.prototype.toSpliced (start, deleteCount , ...items )
+
+  ...
+  9. Else if deleteCount is not present, then
+    a. Let actualDeleteCount be len - actualStart.
+  ...
+features: [change-array-by-copy]
+includes: [compareArray.js]
+---*/
+
+var result = ["first", "second", "third"].toSpliced(1);
+
+assert.compareArray(result, ["first"]);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/toSpliced/deleteCount-undefined.js b/js/src/tests/test262/built-ins/Array/prototype/toSpliced/deleteCount-undefined.js
new file mode 100644
index 0000000000..ed1b4dffb7
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/toSpliced/deleteCount-undefined.js
@@ -0,0 +1,31 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.toSpliced
+description: Array.prototype.toSpliced(number, undefined) returns a copy of the original array
+info: |
+  22.1.3.25 Array.prototype.toSpliced (start, deleteCount , ...items )
+
+  ...
+  3. Let relativeStart be ? ToIntegerOrInfinity(start).
+  ...
+  6. Else, let actualStart be min(relativeStart, len).
+  ...
+  8. If start is not present, then
+    a. Let actualDeleteCount be 0.
+  9. Else if deleteCount is not present, then
+    a. Let actualDeleteCount be len - actualStart.
+  10. Else,
+    a. Let dc be ? ToIntegerOrInfinity(deleteCount).
+    b. Let actualDeleteCount be the result of clamping dc between 0 and len - actualStart.
+  ...
+features: [change-array-by-copy]
+includes: [compareArray.js]
+---*/
+
+var result = ["first", "second", "third"].toSpliced(1, undefined);
+
+assert.compareArray(result, ["first", "second", "third"]);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/toSpliced/discarded-element-not-read.js b/js/src/tests/test262/built-ins/Array/prototype/toSpliced/discarded-element-not-read.js
new file mode 100644
index 0000000000..1544086f47
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/toSpliced/discarded-element-not-read.js
@@ -0,0 +1,54 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.toSpliced
+description: Array.prototype.toSpliced does not Get the discarded elements in the original array
+info: |
+  22.1.3.25 Array.prototype.toSpliced (start, deleteCount , ...items )
+
+  ...
+  3. Let relativeStart be ? ToIntegerOrInfinity(start).
+  ...
+  6. Else, let actualStart be min(relativeStart, len).
+  ...
+  8. If start is not present, then
+    a. Let actualDeleteCount be 0.
+  9. Else if deleteCount is not present, then
+    a. Let actualDeleteCount be len - actualStart.
+  10. Else,
+    a. Let dc be ? ToIntegerOrInfinity(deleteCount).
+    b. Let actualDeleteCount be the result of clamping dc between 0 and len - actualStart.
+  11. Let newLen be len + insertCount - actualDeleteCount.
+  ...
+  15. Let r be actualStart + actualDeleteCount.
+  ...
+  18. Repeat, while i < newLen,
+    a. Let Pi be ! ToString(𝔽(i)).
+    b. Let from be ! ToString(𝔽(r)).
+    c. Let fromValue be ? Get(O, from).
+    d. Perform ! CreateDataPropertyOrThrow(A, Pi, fromValue).
+    e. Set i to i + 1.
+    f. Set r to r + 1.
+
+features: [change-array-by-copy]
+includes: [compareArray.js]
+---*/
+
+var arrayLike = {
+  0: "a",
+  1: "b",
+  get 2() { throw new Test262Error(); },
+  3: "c",
+  length: 4,
+};
+
+/*
+ * In this example, just before step 18, i == 2 and r == 3.
+ * So A[2] is set to arrayLike[3] and arrayLike[2] is never read
+ * (since i and r both increase monotonically).
+ */
+var result = Array.prototype.toSpliced.call(arrayLike, 2, 1);
+assert.compareArray(result, ["a", "b", "c"]);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/toSpliced/elements-read-in-order.js b/js/src/tests/test262/built-ins/Array/prototype/toSpliced/elements-read-in-order.js
new file mode 100644
index 0000000000..da1b7fc905
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/toSpliced/elements-read-in-order.js
@@ -0,0 +1,61 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.toSpliced
+description: Array.prototype.toSpliced reads the items of the original array in order
+info: |
+  22.1.3.25 Array.prototype.toSpliced (start, deleteCount , ...items )
+
+  ...
+  14. Let i be 0.
+  15. Let r be actualStart + actualDeleteCount.
+  16. Repeat, while i < actualStart,
+    a. Let Pi be ! ToString(𝔽(i)).
+    b. Let iValue be ? Get(O, Pi).
+    c. Perform ! CreateDataPropertyOrThrow(A, Pi, iValue).
+    d. Set i to i + 1.
+  17. For each element E of items, do
+    a. Let Pi be ! ToString(𝔽(i)).
+    b. Perform ! CreateDataPropertyOrThrow(A, Pi, E).
+    c. Set i to i + 1.
+  18. Repeat, while i < newLen,
+    a. Let Pi be ! ToString(𝔽(i)).
+    b. Let from be ! ToString(𝔽(r)).
+    c. Let fromValue be ? Get(O, from).
+    d. Perform ! CreateDataPropertyOrThrow(A, Pi, fromValue).
+    e. Set i to i + 1.
+    f. Set r to r + 1.
+  ...
+
+features: [change-array-by-copy]
+includes: [compareArray.js]
+---*/
+
+var order = [];
+
+var arrayLike = {
+  get 0() { order.push(0); return "a" },
+  get 1() { order.push(1); return "b" },
+  2: "none",
+  get 3() { order.push(3); return "c" },
+  length: 4,
+};
+
+var result = Array.prototype.toSpliced.call(arrayLike, 2, 1);
+assert.compareArray(result, ["a", "b", "c"]);
+
+assert.compareArray(order, [0, 1, 3]);
+
+order = [];
+var arr = [0, 1, "none", 3];
+Object.defineProperty(arr, 0, { get: function() { order.push(0); return "a" } });
+Object.defineProperty(arr, 1, { get: function() { order.push(1); return "b" } });
+Object.defineProperty(arr, 3, { get: function() { order.push(3); return "c" } });
+
+result = Array.prototype.toSpliced.call(arr, 2, 1);
+assert.compareArray(result, ["a", "b", "c"]);
+
+assert.compareArray(order, [0, 1, 3]);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/toSpliced/frozen-this-value.js b/js/src/tests/test262/built-ins/Array/prototype/toSpliced/frozen-this-value.js
new file mode 100644
index 0000000000..3013dee9f1
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/toSpliced/frozen-this-value.js
@@ -0,0 +1,20 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.toSpliced
+description: >
+  Array.prototype.toSpliced works on frozen objects
+features: [change-array-by-copy]
+includes: [compareArray.js]
+---*/
+
+var arr = Object.freeze([2, 0, 1]);
+var result = arr.toSpliced();
+assert.compareArray(result, [2, 0, 1]);
+
+var arrayLike = Object.freeze({ length: 3, 0: 0, 1: 1, 2: 2 });
+
+assert.compareArray(Array.prototype.toSpliced.call(arrayLike, 1, 1, 4, 5), [0, 4, 5, 2]);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/toSpliced/holes-not-preserved.js b/js/src/tests/test262/built-ins/Array/prototype/toSpliced/holes-not-preserved.js
new file mode 100644
index 0000000000..3fb2e312a2
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/toSpliced/holes-not-preserved.js
@@ -0,0 +1,43 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.toSpliced
+description: >
+  Array.prototype.toSpliced does not preserve holes in the array
+info: |
+  Array.prototype.toSpliced ( start, deleteCount, ...items )
+
+  ...
+  13. Let k be 0.
+  14. Repeat, while k < actualStart,
+    a. Let Pk be ! ToString(𝔽(k)).
+    b. Let kValue be ? Get(O, Pk).
+    c. Perform ? CreateDataPropertyOrThrow(A, Pk, kValue).
+    d. Set k to k + 1.
+  ...
+  16. Repeat, while k < newLen,
+    a. Let Pk be ! ToString(𝔽(k)).
+    b. Let from be ! ToString(𝔽(k + actualDeleteCount - insertCount)).
+    c. Let fromValue be ? Get(O, from).
+    d. Perform ? CreateDataPropertyOrThrow(A, Pk, fromValue).
+    e. Set k to k + 1.
+  ...
+includes: [compareArray.js]
+features: [change-array-by-copy]
+---*/
+
+var arr = [0, /* hole */, 2, /* hole */, 4];
+Array.prototype[3] = 3;
+
+var spliced = arr.toSpliced(0, 0);
+assert.compareArray(spliced, [0, undefined, 2, 3, 4]);
+assert(spliced.hasOwnProperty(1));
+assert(spliced.hasOwnProperty(3));
+
+spliced = arr.toSpliced(0, 0, -1);
+assert.compareArray(spliced, [-1, 0, undefined, 2, 3, 4]);
+assert(spliced.hasOwnProperty(1));
+assert(spliced.hasOwnProperty(3));
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/toSpliced/ignores-species.js b/js/src/tests/test262/built-ins/Array/prototype/toSpliced/ignores-species.js
new file mode 100644
index 0000000000..fd55356656
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/toSpliced/ignores-species.js
@@ -0,0 +1,32 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.toSpliced
+description: >
+  Array.prototype.toSpliced ignores @@species
+info: |
+  Array.prototype.toSpliced ( start, deleteCount, ...items )
+
+  ...
+  12. Let A be ? ArrayCreate(𝔽(newLen)).
+  ...
+features: [change-array-by-copy]
+---*/
+
+var a = [];
+a.constructor = {};
+a.constructor[Symbol.species] = function () {}
+
+assert.sameValue(Object.getPrototypeOf(a.toSpliced(0, 0)), Array.prototype);
+
+var b = [];
+Object.defineProperty(b, "constructor", {
+  get() {
+    throw new Test262Error("Should not get .constructor");
+  }
+});
+
+b.toSpliced(0, 0);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/toSpliced/immutable.js b/js/src/tests/test262/built-ins/Array/prototype/toSpliced/immutable.js
new file mode 100644
index 0000000000..710da9916c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/toSpliced/immutable.js
@@ -0,0 +1,19 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.toSpliced
+description: >
+  Array.prototype.toSpliced does not mutate its this value
+features: [change-array-by-copy]
+includes: [compareArray.js]
+---*/
+
+var arr = [2, 0, 1];
+arr.toSpliced(0, 0, -1);
+
+assert.compareArray(arr, [2, 0, 1]);
+assert.notSameValue(arr.toSpliced(0, 0, -1), arr);
+assert.notSameValue(arr.toSpliced(0, 1, -1), arr);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/toSpliced/length-casted-to-zero.js b/js/src/tests/test262/built-ins/Array/prototype/toSpliced/length-casted-to-zero.js
new file mode 100644
index 0000000000..de36d2c41a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/toSpliced/length-casted-to-zero.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.toSpliced
+description: >
+  Array.prototype.toSpliced treats its `this` value's `length` property as zero if the
+  property's value is not a positive integer.
+info: |
+  Array.prototype.toSpliced ( start, deleteCount, ...items )
+
+  ...
+  2. Let len be ? LengthOfArrayLike(O).
+  ...
+features: [change-array-by-copy]
+includes: [compareArray.js]
+---*/
+
+assert.compareArray(Array.prototype.toSpliced.call({ length: -2 }, 0, 0, 2, 3), [2, 3]);
+assert.compareArray(Array.prototype.toSpliced.call({ length: "dog" }, 0, 0, 2, 3), [2, 3]);
+assert.compareArray(Array.prototype.toSpliced.call({ length: NaN }, 0, 0, 2, 3), [2, 3]);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/toSpliced/length-clamped-to-2pow53minus1.js b/js/src/tests/test262/built-ins/Array/prototype/toSpliced/length-clamped-to-2pow53minus1.js
new file mode 100644
index 0000000000..0ce88ef200
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/toSpliced/length-clamped-to-2pow53minus1.js
@@ -0,0 +1,36 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.toSpliced
+description: >
+  Length is clamped to 2^53-1 when they exceed the integer limit.
+info: |
+  ...
+  2. Let len be ? LengthOfArrayLike(O).
+  ...
+
+  ToLength ( argument )
+
+  1. Let len be ? ToIntegerOrInfinity(argument).
+  2. If len ≤ 0, return +0𝔽.
+  3. Return 𝔽(min(len, 2^53 - 1))
+features: [change-array-by-copy, exponentiation]
+includes: [compareArray.js]
+---*/
+
+var arrayLike = {
+  "9007199254740989": 2 ** 53 - 3,
+  "9007199254740990": 2 ** 53 - 2,
+  "9007199254740991": 2 ** 53 - 1,
+  "9007199254740992": 2 ** 53,
+  "9007199254740994": 2 ** 53 + 2, // NOTE: 2 ** 53 + 1 is 2 ** 53
+  length: 2 ** 53 + 20,
+};
+
+var result = Array.prototype.toSpliced.call(arrayLike, 0, 2 ** 53 - 3);
+
+assert.sameValue(result.length, 2);
+assert.compareArray(result, [2 ** 53 - 3, 2 ** 53 - 2]);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/toSpliced/length-decreased-while-iterating.js b/js/src/tests/test262/built-ins/Array/prototype/toSpliced/length-decreased-while-iterating.js
new file mode 100644
index 0000000000..35d4767b8f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/toSpliced/length-decreased-while-iterating.js
@@ -0,0 +1,46 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.toSpliced
+description: >
+  Array.prototype.toSpliced caches the length getting the array elements.
+info: |
+  Array.prototype.toSpliced ( start, deleteCount, ...items )
+
+  ...
+  2. Let len be ? LengthOfArrayLike(O).
+  ...
+  11. Let newLen be len + insertCount - actualDeleteCount.
+  ...
+  13. Let k be 0.
+  14. Repeat, while k < actualStart,
+    a. Let Pk be ! ToString(𝔽(k)).
+    b. Let kValue be ? Get(O, Pk).
+    c. Perform ? CreateDataPropertyOrThrow(A, Pk, kValue).
+    d. Set k to k + 1.
+  ...
+  16. Repeat, while k < newLen,
+    a. Let Pk be ! ToString(𝔽(k)).
+    b. Let from be ! ToString(𝔽(k + actualDeleteCount - insertCount)).
+    c. Let fromValue be ? Get(O, from).
+    d. Perform ? CreateDataPropertyOrThrow(A, Pk, fromValue).
+    e. Set k to k + 1.
+  ...
+features: [change-array-by-copy]
+includes: [compareArray.js]
+---*/
+
+var arr = [0, 1, 2, 3, 4, 5];
+Array.prototype[3] = 6;
+
+Object.defineProperty(arr, "2", {
+  get() {
+    arr.length = 1;
+    return 2;
+  }
+});
+
+assert.compareArray(arr.toSpliced(0, 0), [0, 1, 2, 6, undefined, undefined]);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/toSpliced/length-exceeding-array-length-limit.js b/js/src/tests/test262/built-ins/Array/prototype/toSpliced/length-exceeding-array-length-limit.js
new file mode 100644
index 0000000000..a8ad3e4624
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/toSpliced/length-exceeding-array-length-limit.js
@@ -0,0 +1,78 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.toSpliced
+description: >
+  Array.prototype.toSpliced limits the length to 2 ** 32 - 1
+info: |
+  Array.prototype.toSpliced ( start, deleteCount, ...items )
+
+  ...
+  3. Let len be ? LengthOfArrayLike(O).
+  ...
+  11. Let newLen be len + insertCount - actualDeleteCount.
+  12. If _newLen_ > 2 ** 53< - 1, throw a *TypeError* exception.
+  13. Let A be ? ArrayCreate(𝔽(newLen)).
+  ...
+
+  ArrayCreate ( length [, proto ] )
+
+  1. If length > 2 ** 32 - 1, throw a RangeError exception.
+features: [change-array-by-copy, exponentiation]
+---*/
+
+// Object with large "length" property
+var arrayLike = {
+  get "0"() {
+    throw new Test262Error("Get 0");
+  },
+  get "4294967295" () { // 2 ** 32 - 1
+    throw new Test262Error("Get 4294967295");
+  },
+  get "4294967296" () { // 2 ** 32
+    throw new Test262Error("Get 4294967296");
+  },
+  length: 2 ** 32
+};
+
+assert.throws(RangeError, function() {
+  Array.prototype.toSpliced.call(arrayLike, 0, 0);
+});
+
+arrayLike.length = 2 ** 32 - 1;
+assert.throws(RangeError, function() {
+  Array.prototype.toSpliced.call(arrayLike, 0, 0, 1);
+});
+
+arrayLike.length = 2 ** 32;
+assert.throws(RangeError, function() {
+  Array.prototype.toSpliced.call(arrayLike, 0, 0, 1);
+});
+
+arrayLike.length = 2 ** 32 + 1;
+assert.throws(RangeError, function() {
+  Array.prototype.toSpliced.call(arrayLike, 0, 0, 1);
+});
+
+arrayLike.length = 2 ** 52 - 2;
+assert.throws(RangeError, function() {
+  Array.prototype.toSpliced.call(arrayLike, 0, 0, 1);
+});
+
+arrayLike.length = 2 ** 53 - 1;
+assert.throws(TypeError, function() {
+  Array.prototype.toSpliced.call(arrayLike, 0, 0, 1);
+});
+
+arrayLike.length = 2 ** 53;
+assert.throws(TypeError, function() {
+  Array.prototype.toSpliced.call(arrayLike, 0, 0, 1);
+});
+
+arrayLike.length = 2 ** 53 + 1;
+assert.throws(TypeError, function() {
+  Array.prototype.toSpliced.call(arrayLike, 0, 0, 1);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/toSpliced/length-increased-while-iterating.js b/js/src/tests/test262/built-ins/Array/prototype/toSpliced/length-increased-while-iterating.js
new file mode 100644
index 0000000000..f125316834
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/toSpliced/length-increased-while-iterating.js
@@ -0,0 +1,39 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.toSpliced
+description: >
+  Array.prototype.toSpliced caches the length getting the array elements.
+info: |
+  Array.prototype.toSpliced ( start, deleteCount, ...items )
+
+  ...
+  3. Let len be ? LengthOfArrayLike(O).
+  ...
+  5. Let k be 0.
+  6. Repeat, while k < len,
+    a. Let Pk be ! ToString(𝔽(k)).
+    b. Let kValue be ? Get(O, Pk).
+    ...
+features: [change-array-by-copy]
+includes: [compareArray.js]
+---*/
+
+var arr = [0, 1, 2];
+Object.defineProperty(arr, "0", {
+  get() {
+    arr.push(10);
+    return 0;
+  }
+});
+Object.defineProperty(arr, "2", {
+  get() {
+    arr.push(11);
+    return 2;
+  }
+});
+
+assert.compareArray(arr.toSpliced(1, 0, 0.5), [0, 0.5, 1, 2]);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/toSpliced/length-tolength.js b/js/src/tests/test262/built-ins/Array/prototype/toSpliced/length-tolength.js
new file mode 100644
index 0000000000..fc40bb8aa6
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/toSpliced/length-tolength.js
@@ -0,0 +1,31 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.toSpliced
+description: >
+  Array.prototype.toSpliced converts the this value length to a number.
+info: |
+  Array.prototype.toSpliced ( start, deleteCount, ...items )
+
+  ...
+  2. Let len be ? LengthOfArrayLike(O).
+  ...
+features: [change-array-by-copy]
+includes: [compareArray.js]
+---*/
+
+assert.compareArray(Array.prototype.toSpliced.call({ length: "2", 0: 0, 1: 1, 2: 2 }, 0, 0), [0, 1]);
+
+var arrayLike = {
+  length: {
+    valueOf: () => 2
+  },
+  0: 0,
+  1: 1,
+  2: 2,
+};
+
+assert.compareArray(Array.prototype.toSpliced.call(arrayLike, 0, 0), [0, 1]);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/toSpliced/metadata/browser.js b/js/src/tests/test262/built-ins/Array/prototype/toSpliced/metadata/browser.js
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/js/src/tests/test262/built-ins/Array/prototype/toSpliced/metadata/length.js b/js/src/tests/test262/built-ins/Array/prototype/toSpliced/metadata/length.js
new file mode 100644
index 0000000000..63916778a5
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/toSpliced/metadata/length.js
@@ -0,0 +1,32 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.toSpliced
+description: >
+  The "length" property of Array.prototype.toSpliced
+info: |
+  17 ECMAScript Standard Built-in Objects
+
+  Every built-in function object, including constructors, has a length property
+  whose value is an integer. Unless otherwise specified, this value is equal to
+  the largest number of named arguments shown in the subclause headings for the
+  function description. Optional parameters (which are indicated with brackets:
+  [ ]) or rest parameters (which are shown using the form «...name») are not
+  included in the default argument count.
+
+  Unless otherwise specified, the length property of a built-in function object
+  has the attributes { [[Writable]]: false, [[Enumerable]]: false,
+    [[Configurable]]: true }.
+includes: [propertyHelper.js]
+features: [change-array-by-copy]
+---*/
+
+verifyProperty(Array.prototype.toSpliced, "length", {
+  value: 2,
+  writable: false,
+  enumerable: false,
+  configurable: true,
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/toSpliced/metadata/name.js b/js/src/tests/test262/built-ins/Array/prototype/toSpliced/metadata/name.js
new file mode 100644
index 0000000000..9025e4e34f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/toSpliced/metadata/name.js
@@ -0,0 +1,30 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.toSpliced
+description: >
+  Array.prototype.toSpliced.name is "toSpliced".
+info: |
+  Array.prototype.toSpliced ( start, deleteCount, ...items )
+
+  17 ECMAScript Standard Built-in Objects:
+    Every built-in Function object, including constructors, that is not
+    identified as an anonymous function has a name property whose value
+    is a String.
+
+    Unless otherwise specified, the name property of a built-in Function
+    object, if it exists, has the attributes { [[Writable]]: false,
+    [[Enumerable]]: false, [[Configurable]]: true }.
+includes: [propertyHelper.js]
+features: [change-array-by-copy]
+---*/
+
+verifyProperty(Array.prototype.toSpliced, "name", {
+  value: "toSpliced",
+  writable: false,
+  enumerable: false,
+  configurable: true,
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/toSpliced/metadata/property-descriptor.js b/js/src/tests/test262/built-ins/Array/prototype/toSpliced/metadata/property-descriptor.js
new file mode 100644
index 0000000000..9c9eadef59
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/toSpliced/metadata/property-descriptor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.toSpliced
+description: >
+  "toSpliced" property of Array.prototype
+info: |
+  17 ECMAScript Standard Built-in Objects
+
+  Every other data property described in clauses 18 through 26 and in Annex B.2
+  has the attributes { [[Writable]]: true, [[Enumerable]]: false,
+    [[Configurable]]: true } unless otherwise specified.
+includes: [propertyHelper.js]
+features: [change-array-by-copy]
+---*/
+
+assert.sameValue(typeof Array.prototype.toSpliced, "function", "typeof");
+
+verifyProperty(Array.prototype, "toSpliced", {
+  value: Array.prototype.toSpliced,
+  writable: true,
+  enumerable: false,
+  configurable: true,
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/toSpliced/metadata/shell.js b/js/src/tests/test262/built-ins/Array/prototype/toSpliced/metadata/shell.js
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/js/src/tests/test262/built-ins/Array/prototype/toSpliced/mutate-while-iterating.js b/js/src/tests/test262/built-ins/Array/prototype/toSpliced/mutate-while-iterating.js
new file mode 100644
index 0000000000..208976b7cb
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/toSpliced/mutate-while-iterating.js
@@ -0,0 +1,52 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.toSpliced
+description: >
+  Array.prototype.toSpliced gets array elements one at a time.
+info: |
+  Array.prototype.toSpliced ( start, deleteCount, ...items )
+
+  ...
+  16. Repeat, while i < actualStart,
+    a. Let Pi be ! ToString(𝔽(i)).
+    b. Let iValue be ? Get(O, Pi).
+    c. Perform ! CreateDataPropertyOrThrow(A, Pi, iValue).
+    d. Set i to i + 1.
+  ...
+  18. Repeat, while i < newLen,
+    a. Let Pi be ! ToString(𝔽(i)).
+    b. Let from be ! ToString(𝔽(r)).
+    c. Let fromValue be ? Get(O, from).
+    d. Perform ! CreateDataPropertyOrThrow(A, Pi, fromValue).
+    e. Set i to i + 1.
+    f. Set r to r + 1.
+  ...
+
+features: [change-array-by-copy]
+includes: [compareArray.js]
+---*/
+
+var arr = [0, 1, 2, 3];
+var zerothElementStorage = arr[0];
+Object.defineProperty(arr, "0", {
+  get() {
+    arr[1] = 42;
+    return zerothElementStorage;
+  },
+  set(v) {
+    zerothElementStorage = v;
+  }
+});
+Object.defineProperty(arr, "2", {
+  get() {
+    arr[0] = 17;
+    arr[3] = 37;
+    return 2;
+  }
+});
+
+assert.compareArray(arr.toSpliced(1, 0, 0.5), [0, 0.5, 42, 2, 37]);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/toSpliced/not-a-constructor.js b/js/src/tests/test262/built-ins/Array/prototype/toSpliced/not-a-constructor.js
new file mode 100644
index 0000000000..533e8c9eaa
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/toSpliced/not-a-constructor.js
@@ -0,0 +1,34 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Array.prototype.toSpliced does not implement [[Construct]], is not new-able
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+
+  sec-evaluatenew
+
+  ...
+  7. If IsConstructor(constructor) is false, throw a TypeError exception.
+  ...
+includes: [isConstructor.js]
+features: [change-array-by-copy, Reflect.construct]
+---*/
+
+assert.sameValue(
+  isConstructor(Array.prototype.toSpliced),
+  false,
+  'isConstructor(Array.prototype.toSpliced) must return false'
+);
+
+assert.throws(TypeError, () => {
+  new Array.prototype.toSpliced();
+}, '`new Array.prototype.toSpliced()` throws TypeError');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/toSpliced/shell.js b/js/src/tests/test262/built-ins/Array/prototype/toSpliced/shell.js
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/js/src/tests/test262/built-ins/Array/prototype/toSpliced/start-and-deleteCount-missing.js b/js/src/tests/test262/built-ins/Array/prototype/toSpliced/start-and-deleteCount-missing.js
new file mode 100644
index 0000000000..19688d17af
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/toSpliced/start-and-deleteCount-missing.js
@@ -0,0 +1,29 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.toSpliced
+description: Array.prototype.toSpliced returns a copy of the array if called with zero arguments
+info: |
+  22.1.3.25 Array.prototype.toSpliced (start, deleteCount , ...items )
+
+  ...
+  3. Let relativeStart be ? ToIntegerOrInfinity(start).
+  ...
+  6. Else, let actualStart be min(relativeStart, len).
+  ...
+  8. If start is not present, then
+    a. Let actualDeleteCount be 0.
+  ...
+features: [change-array-by-copy]
+includes: [compareArray.js]
+---*/
+
+let arr = ["first", "second", "third"];
+let result = arr.toSpliced();
+
+assert.compareArray(result, arr);
+assert.notSameValue(result, arr);
+
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/toSpliced/start-and-deleteCount-undefineds.js b/js/src/tests/test262/built-ins/Array/prototype/toSpliced/start-and-deleteCount-undefineds.js
new file mode 100644
index 0000000000..a07388dca2
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/toSpliced/start-and-deleteCount-undefineds.js
@@ -0,0 +1,31 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.toSpliced
+description: Array.prototype.toSpliced(undefined, undefined) returns a copy of the original array
+info: |
+  22.1.3.25 Array.prototype.toSpliced (start, deleteCount , ...items )
+
+  ...
+  3. Let relativeStart be ? ToIntegerOrInfinity(start).
+  ...
+  6. Else, let actualStart be min(relativeStart, len).
+  ...
+  8. If start is not present, then
+    a. Let actualDeleteCount be 0.
+  8. Else if deleteCount is not present, then
+    a. Let actualDeleteCount be len - actualStart.
+  ...
+features: [change-array-by-copy]
+includes: [compareArray.js]
+---*/
+
+let arr = ["first", "second", "third"];
+let result = arr.toSpliced(undefined, undefined);
+
+assert.compareArray(result, arr);
+assert.notSameValue(result, arr);
+
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/toSpliced/start-bigger-than-length.js b/js/src/tests/test262/built-ins/Array/prototype/toSpliced/start-bigger-than-length.js
new file mode 100644
index 0000000000..ca073db0e0
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/toSpliced/start-bigger-than-length.js
@@ -0,0 +1,25 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.toSpliced
+description: >
+  Array.prototype.toSpliced clamps the start argument to the this value length.
+info: |
+  Array.prototype.toSpliced ( start, deleteCount, ...items )
+
+  ...
+  2. Let len be ? LengthOfArrayLike(O).
+  3. Let relativeStart be ? ToIntegerOrInfinity(start).
+  4. If relativeStart is -∞, let actualStart be 0.
+  5. Else if relativeStart < 0, let actualStart be max(len + relativeStart, 0).
+  6. Else, let actualStart be min(relativeStart, len).
+  ...
+features: [change-array-by-copy]
+includes: [compareArray.js]
+---*/
+
+var result = [0, 1, 2, 3, 4].toSpliced(10, 1, 5, 6);
+assert.compareArray(result, [0, 1, 2, 3, 4, 5, 6]);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/toSpliced/start-neg-infinity-is-zero.js b/js/src/tests/test262/built-ins/Array/prototype/toSpliced/start-neg-infinity-is-zero.js
new file mode 100644
index 0000000000..cc025bd98e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/toSpliced/start-neg-infinity-is-zero.js
@@ -0,0 +1,24 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.toSpliced
+description: >
+  Array.prototype.toSpliced treats negative Infinity as zero for start.
+info: |
+  Array.prototype.toSpliced ( start, deleteCount, ...items )
+
+  ...
+  2. Let len be ? LengthOfArrayLike(O).
+  3. Let relativeStart be ? ToIntegerOrInfinity(start).
+  4. If relativeStart is -∞, let actualStart be 0.
+  5. Else if relativeStart < 0, let actualStart be max(len + relativeStart, 0).
+  ...
+features: [change-array-by-copy]
+includes: [compareArray.js]
+---*/
+
+var result = [0, 1, 2, 3, 4].toSpliced(-Infinity, 2);
+assert.compareArray(result, [2, 3, 4]);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/toSpliced/start-neg-less-than-minus-length-is-zero.js b/js/src/tests/test262/built-ins/Array/prototype/toSpliced/start-neg-less-than-minus-length-is-zero.js
new file mode 100644
index 0000000000..79ccf7b51b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/toSpliced/start-neg-less-than-minus-length-is-zero.js
@@ -0,0 +1,24 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.toSpliced
+description: >
+  Array.prototype.toSpliced treats a value smaller than -length as zero for start.
+info: |
+  Array.prototype.toSpliced ( start, deleteCount, ...items )
+
+  ...
+  2. Let len be ? LengthOfArrayLike(O).
+  3. Let relativeStart be ? ToIntegerOrInfinity(start).
+  4. If relativeStart is -∞, let actualStart be 0.
+  5. Else if relativeStart < 0, let actualStart be max(len + relativeStart, 0).
+  ...
+features: [change-array-by-copy]
+includes: [compareArray.js]
+---*/
+
+var result = [0, 1, 2, 3, 4].toSpliced(-20, 2);
+assert.compareArray(result, [2, 3, 4]);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/toSpliced/start-neg-subtracted-from-length.js b/js/src/tests/test262/built-ins/Array/prototype/toSpliced/start-neg-subtracted-from-length.js
new file mode 100644
index 0000000000..4bbd45e665
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/toSpliced/start-neg-subtracted-from-length.js
@@ -0,0 +1,24 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.toSpliced
+description: >
+  Array.prototype.toSpliced treats a negative start as relative to the end.
+info: |
+  Array.prototype.toSpliced ( start, deleteCount, ...items )
+
+  ...
+  2. Let len be ? LengthOfArrayLike(O).
+  3. Let relativeStart be ? ToIntegerOrInfinity(start).
+  4. If relativeStart is -∞, let actualStart be 0.
+  5. Else if relativeStart < 0, let actualStart be max(len + relativeStart, 0).
+  ...
+features: [change-array-by-copy]
+includes: [compareArray.js]
+---*/
+
+var result = [0, 1, 2, 3, 4].toSpliced(-3, 2);
+assert.compareArray(result, [0, 1, 4]);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/toSpliced/start-undefined-and-deleteCount-missing.js b/js/src/tests/test262/built-ins/Array/prototype/toSpliced/start-undefined-and-deleteCount-missing.js
new file mode 100644
index 0000000000..1cc6c57ad9
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/toSpliced/start-undefined-and-deleteCount-missing.js
@@ -0,0 +1,28 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.toSpliced
+description: Array.prototype.toSpliced(undefined) returns an empty array
+info: |
+  22.1.3.25 Array.prototype.toSpliced (start, deleteCount , ...items )
+
+  ...
+  3. Let relativeStart be ? ToIntegerOrInfinity(start).
+  ...
+  6. Else, let actualStart be min(relativeStart, len).
+  ...
+  8. If start is not present, then
+    a. Let actualDeleteCount be 0.
+  8. Else if deleteCount is not present, then
+    a. Let actualDeleteCount be len - actualStart.
+  ...
+features: [change-array-by-copy]
+includes: [compareArray.js]
+---*/
+
+var result = ["first", "second", "third"].toSpliced(undefined);
+
+assert.compareArray(result, []);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/toSpliced/this-value-boolean.js b/js/src/tests/test262/built-ins/Array/prototype/toSpliced/this-value-boolean.js
new file mode 100644
index 0000000000..0f97abcd1d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/toSpliced/this-value-boolean.js
@@ -0,0 +1,31 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.toSpliced
+description: >
+  Array.prototype.toSpliced converts booleans to objects
+info: |
+  Array.prototype.toSpliced ( start, deleteCount, ...items )
+
+  1. Let O be ? ToObject(this value).
+  2. Let len be ? LengthOfArrayLike(O).
+  ...
+features: [change-array-by-copy]
+includes: [compareArray.js]
+---*/
+
+assert.compareArray(Array.prototype.toSpliced.call(true, 0, 0), []);
+assert.compareArray(Array.prototype.toSpliced.call(false, 0, 0), []);
+
+/* Add length and indexed properties to `Boolean.prototype` */
+Boolean.prototype.length = 3;
+assert.compareArray(Array.prototype.toSpliced.call(true, 0, 0), [undefined, undefined, undefined]);
+assert.compareArray(Array.prototype.toSpliced.call(false, 0, 0), [undefined, undefined, undefined]);
+delete Boolean.prototype.length;
+Boolean.prototype[0] = "monkeys";
+Boolean.prototype[2] = "bogus";
+assert.compareArray(Array.prototype.toSpliced.call(true, 0, 0), []);
+assert.compareArray(Array.prototype.toSpliced.call(false, 0, 0), []);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/toSpliced/this-value-nullish.js b/js/src/tests/test262/built-ins/Array/prototype/toSpliced/this-value-nullish.js
new file mode 100644
index 0000000000..1230d05f00
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/toSpliced/this-value-nullish.js
@@ -0,0 +1,24 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.toSpliced
+description: >
+  Array.prototype.toSpliced throws if the receiver is null or undefined
+info: |
+  Array.prototype.toSpliced ( start, deleteCount, ...items )
+
+  1. Let O be ? ToObject(this value).
+  ...
+features: [change-array-by-copy]
+---*/
+
+assert.throws(TypeError, () => {
+  Array.prototype.toSpliced.call(null, 0, 0);
+}, '`Array.prototype.toSpliced.call(null)` throws TypeError');
+
+assert.throws(TypeError, () => {
+  Array.prototype.toSpliced.call(undefined, 0, 0);
+}, '`Array.prototype.toSpliced.call(undefined)` throws TypeError');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/toSpliced/unmodified.js b/js/src/tests/test262/built-ins/Array/prototype/toSpliced/unmodified.js
new file mode 100644
index 0000000000..d2983fd830
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/toSpliced/unmodified.js
@@ -0,0 +1,17 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.toSpliced
+description: >
+  Array.prototype.toSpliced returns a new array even if it the result is equal to the original array
+features: [change-array-by-copy]
+includes: [compareArray.js]
+---*/
+
+var arr = [1, 2, 3];
+var spliced = arr.toSpliced(1, 0);
+assert.notSameValue(arr, spliced);
+assert.compareArray(arr, spliced);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/toString/S15.4.4.2_A1_T1.js b/js/src/tests/test262/built-ins/Array/prototype/toString/S15.4.4.2_A1_T1.js
new file mode 100644
index 0000000000..37a3adeced
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/toString/S15.4.4.2_A1_T1.js
@@ -0,0 +1,33 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.tostring
+info: |
+    The result of calling this function is the same as if
+    the built-in join method were invoked for this object with no argument
+es5id: 15.4.4.2_A1_T1
+description: If Result(2) is zero, return the empty string
+---*/
+
+var x = new Array();
+if (x.toString() !== x.join()) {
+  throw new Test262Error('#1.1: x = new Array(); x.toString() === x.join(). Actual: ' + (x.toString()));
+} else {
+  if (x.toString() !== "") {
+    throw new Test262Error('#1.2: x = new Array(); x.toString() === "". Actual: ' + (x.toString()));
+  }
+}
+
+x = [];
+x[0] = 1;
+x.length = 0;
+if (x.toString() !== x.join()) {
+  throw new Test262Error('#2.1: x = []; x[0] = 1; x.length = 0; x.toString() === x.join(). Actual: ' + (x.toString()));
+} else {
+  if (x.toString() !== "") {
+    throw new Test262Error('#2.2: x = []; x[0] = 1; x.length = 0; x.toString() === "". Actual: ' + (x.toString()));
+  }
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/toString/S15.4.4.2_A1_T2.js b/js/src/tests/test262/built-ins/Array/prototype/toString/S15.4.4.2_A1_T2.js
new file mode 100644
index 0000000000..8a6b4f74ad
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/toString/S15.4.4.2_A1_T2.js
@@ -0,0 +1,56 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.tostring
+info: |
+    The result of calling this function is the same as if
+    the built-in join method were invoked for this object with no argument
+es5id: 15.4.4.2_A1_T2
+description: >
+    The elements of the array are converted to strings, and these
+    strings are  then concatenated, separated by occurrences of the
+    separator. If no separator is provided,  a single comma is used as
+    the separator
+---*/
+
+var x = new Array(0, 1, 2, 3);
+if (x.toString() !== x.join()) {
+  throw new Test262Error('#1.1: x = new Array(0,1,2,3); x.toString() === x.join(). Actual: ' + (x.toString()));
+} else {
+  if (x.toString() !== "0,1,2,3") {
+    throw new Test262Error('#1.2: x = new Array(0,1,2,3); x.toString() === "0,1,2,3". Actual: ' + (x.toString()));
+  }
+}
+
+x = [];
+x[0] = 0;
+x[3] = 3;
+if (x.toString() !== x.join()) {
+  throw new Test262Error('#2.1: x = []; x[0] = 0; x[3] = 3; x.toString() === x.join(). Actual: ' + (x.toString()));
+} else {
+  if (x.toString() !== "0,,,3") {
+    throw new Test262Error('#2.2: x = []; x[0] = 0; x[3] = 3; x.toString() === "0,,,3". Actual: ' + (x.toString()));
+  }
+}
+
+x = Array(undefined, 1, null, 3);
+if (x.toString() !== x.join()) {
+  throw new Test262Error('#3.1: x = Array(undefined,1,null,3); x.toString() === x.join(). Actual: ' + (x.toString()));
+} else {
+  if (x.toString() !== ",1,,3") {
+    throw new Test262Error('#3.2: x = Array(undefined,1,null,3); x.toString() === ",1,,3". Actual: ' + (x.toString()));
+  }
+}
+
+x = [];
+x[0] = 0;
+if (x.toString() !== x.join()) {
+  throw new Test262Error('#4.1: x = []; x[0] = 0; x.toString() === x.join(). Actual: ' + (x.toString()));
+} else {
+  if (x.toString() !== "0") {
+    throw new Test262Error('#4.2: x = []; x[0] = 0; x.toString() === "0". Actual: ' + (x.toString()));
+  }
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/toString/S15.4.4.2_A1_T3.js b/js/src/tests/test262/built-ins/Array/prototype/toString/S15.4.4.2_A1_T3.js
new file mode 100644
index 0000000000..2671bc767c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/toString/S15.4.4.2_A1_T3.js
@@ -0,0 +1,85 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.tostring
+info: |
+    The result of calling this function is the same as if
+    the built-in join method were invoked for this object with no argument
+es5id: 15.4.4.2_A1_T3
+description: Operator use ToString from array arguments
+---*/
+
+var x = new Array("", "", "");
+if (x.toString() !== x.join()) {
+  throw new Test262Error('#0.1: var x = new Array("","",""); x.toString() === x.join(). Actual: ' + (x.toString()));
+} else {
+  if (x.toString() !== ",,") {
+    throw new Test262Error('#0.2: var x = new Array("","",""); x.toString() === ",,". Actual: ' + (x.toString()));
+  }
+}
+
+var x = new Array("\\", "\\", "\\");
+if (x.toString() !== x.join()) {
+  throw new Test262Error('#1.1: var x = new Array("\\","\\","\\"); x.toString() === x.join(). Actual: ' + (x.toString()));
+} else {
+  if (x.toString() !== "\\,\\,\\") {
+    throw new Test262Error('#1.2: var x = new Array("\\","\\","\\"); x.toString() === "\\,\\,\\". Actual: ' + (x.toString()));
+  }
+}
+
+var x = new Array("&", "&", "&");
+if (x.toString() !== x.join()) {
+  throw new Test262Error('#2.1: var x = new Array("&", "&", "&"); x.toString() === x.join(). Actual: ' + (x.toString()));
+} else {
+  if (x.toString() !== "&,&,&") {
+    throw new Test262Error('#2.2: var x = new Array("&", "&", "&"); x.toString() === "&,&,&". Actual: ' + (x.toString()));
+  }
+}
+
+var x = new Array(true, true, true);
+if (x.toString() !== x.join()) {
+  throw new Test262Error('#3.1: var x = new Array(true,true,true); x.toString(true,true,true) === x.join(). Actual: ' + (x.toString(true, true, true)));
+} else {
+  if (x.toString() !== "true,true,true") {
+    throw new Test262Error('#3.2: var x = new Array(true,true,true); x.toString(true,true,true) === "true,true,true". Actual: ' + (x.toString(true, true, true)));
+  }
+}
+
+var x = new Array(null, null, null);
+if (x.toString() !== x.join()) {
+  throw new Test262Error('#4.1: var x = new Array(null,null,null); x.toString(null,null,null) === x.join(). Actual: ' + (x.toString(null, null, null)));
+} else {
+  if (x.toString() !== ",,") {
+    throw new Test262Error('#4.2: var x = new Array(null,null,null); x.toString(null,null,null) === ",,". Actual: ' + (x.toString(null, null, null)));
+  }
+}
+
+var x = new Array(undefined, undefined, undefined);
+if (x.toString() !== x.join()) {
+  throw new Test262Error('#5.1: var x = new Array(undefined,undefined,undefined); x.toString(undefined,undefined,undefined) === x.join(). Actual: ' + (x.toString(undefined, undefined, undefined)));
+} else {
+  if (x.toString() !== ",,") {
+    throw new Test262Error('#5.2: var x = new Array(undefined,undefined,undefined); x.toString(undefined,undefined,undefined) === ",,". Actual: ' + (x.toString(undefined, undefined, undefined)));
+  }
+}
+
+var x = new Array(Infinity, Infinity, Infinity);
+if (x.toString() !== x.join()) {
+  throw new Test262Error('#6.1: var x = new Array(Infinity,Infinity,Infinity); x.toString(Infinity,Infinity,Infinity) === x.join(). Actual: ' + (x.toString(Infinity, Infinity, Infinity)));
+} else {
+  if (x.toString() !== "Infinity,Infinity,Infinity") {
+    throw new Test262Error('#6.2: var x = new Array(Infinity,Infinity,Infinity); x.toString(Infinity,Infinity,Infinity) === "Infinity,Infinity,Infinity". Actual: ' + (x.toString(Infinity, Infinity, Infinity)));
+  }
+}
+
+var x = new Array(NaN, NaN, NaN);
+if (x.toString() !== x.join()) {
+  throw new Test262Error('#7.1: var x = new Array(NaN,NaN,NaN); x.toString(NaN,NaN,NaN) === x.join(). Actual: ' + (x.toString(NaN, NaN, NaN)));
+} else {
+  if (x.toString() !== "NaN,NaN,NaN") {
+    throw new Test262Error('#7.2: var x = new Array(NaN,NaN,NaN); x.toString(NaN,NaN,NaN) === "NaN,NaN,NaN". Actual: ' + (x.toString(NaN, NaN, NaN)));
+  }
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/toString/S15.4.4.2_A1_T4.js b/js/src/tests/test262/built-ins/Array/prototype/toString/S15.4.4.2_A1_T4.js
new file mode 100644
index 0000000000..edf9e63a9b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/toString/S15.4.4.2_A1_T4.js
@@ -0,0 +1,100 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.tostring
+info: |
+    The result of calling this function is the same as if
+    the built-in join method were invoked for this object with no argument
+es5id: 15.4.4.2_A1_T4
+description: If Type(value) is Object, evaluate ToPrimitive(value, String)
+---*/
+
+var object = {
+  valueOf() {
+    return "+"
+  }
+};
+var x = new Array(object);
+assert.sameValue(x.toString(), x.join(), 'x.toString() must return the same value returned by x.join()');
+
+var object = {
+  valueOf() {
+    return "+"
+  },
+  toString() {
+    return "*"
+  }
+};
+var x = new Array(object);
+assert.sameValue(x.toString(), x.join(), 'x.toString() must return the same value returned by x.join()');
+
+var object = {
+  valueOf() {
+    return "+"
+  },
+  toString() {
+    return {}
+  }
+};
+var x = new Array(object);
+assert.sameValue(x.toString(), x.join(), 'x.toString() must return the same value returned by x.join()');
+
+var object = {
+  valueOf() {
+    throw "error"
+  },
+  toString() {
+    return "*"
+  }
+};
+var x = new Array(object);
+assert.sameValue(x.toString(), x.join(), 'x.toString() must return the same value returned by x.join()');
+
+
+var object = {
+  toString() {
+    return "*"
+  }
+};
+var x = new Array(object);
+assert.sameValue(x.toString(), x.join(), 'x.toString() must return the same value returned by x.join()');
+
+var object = {
+  valueOf() {
+    return {}
+  },
+  toString() {
+    return "*"
+  }
+}
+var x = new Array(object);
+assert.sameValue(x.toString(), x.join(), 'x.toString() must return the same value returned by x.join()');
+
+assert.throws(Test262Error, () => {
+  var object = {
+    valueOf() {
+      return "+"
+    },
+    toString() {
+      throw new Test262Error();
+    }
+  };
+  var x = new Array(object);
+  x.toString();
+});
+
+assert.throws(TypeError, () => {
+  var object = {
+    valueOf() {
+      return {}
+    },
+    toString() {
+      return {}
+    }
+  };
+  var x = new Array(object);
+  x.toString();
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/toString/S15.4.4.2_A3_T1.js b/js/src/tests/test262/built-ins/Array/prototype/toString/S15.4.4.2_A3_T1.js
new file mode 100644
index 0000000000..9c7b41558f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/toString/S15.4.4.2_A3_T1.js
@@ -0,0 +1,18 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.tostring
+info: "[[Get]] from not an inherited property"
+es5id: 15.4.4.2_A3_T1
+description: "[[Prototype]] of Array instance is Array.prototype"
+---*/
+
+Array.prototype[1] = 1;
+var x = [0];
+x.length = 2;
+if (x.toString() !== "0,1") {
+  throw new Test262Error('#1: Array.prototype[1] = 1; x = [0]; x.length = 2; x.toString() === "0,1". Actual: ' + (x.toString()));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/toString/browser.js b/js/src/tests/test262/built-ins/Array/prototype/toString/browser.js
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/js/src/tests/test262/built-ins/Array/prototype/toString/call-with-boolean.js b/js/src/tests/test262/built-ins/Array/prototype/toString/call-with-boolean.js
new file mode 100644
index 0000000000..c3c1c20a01
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/toString/call-with-boolean.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2020 Rick Waldron.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.toString
+description: Array.prototype.toString applied to boolean primitive
+---*/
+
+assert.sameValue(
+  Array.prototype.toString.call(true),
+  "[object Boolean]",
+  'Array.prototype.toString.call(true) must return "[object Boolean]"'
+);
+assert.sameValue(
+  Array.prototype.toString.call(false),
+  "[object Boolean]",
+  'Array.prototype.toString.call(false) must return "[object Boolean]"'
+);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/toString/length.js b/js/src/tests/test262/built-ins/Array/prototype/toString/length.js
new file mode 100644
index 0000000000..d9f0df584e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/toString/length.js
@@ -0,0 +1,31 @@
+// Copyright (C) 2016 The V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.tostring
+description: >
+  Array.prototype.toString.length is 0.
+info: |
+  Array.prototype.toString ( )
+
+  17 ECMAScript Standard Built-in Objects:
+    Every built-in Function object, including constructors, has a length
+    property whose value is an integer. Unless otherwise specified, this
+    value is equal to the largest number of named arguments shown in the
+    subclause headings for the function description, including optional
+    parameters. However, rest parameters shown using the form “...name”
+    are not included in the default argument count.
+
+    Unless otherwise specified, the length property of a built-in Function
+    object has the attributes { [[Writable]]: false, [[Enumerable]]: false,
+    [[Configurable]]: true }.
+includes: [propertyHelper.js]
+---*/
+
+assert.sameValue(Array.prototype.toString.length, 0);
+
+verifyNotEnumerable(Array.prototype.toString, "length");
+verifyNotWritable(Array.prototype.toString, "length");
+verifyConfigurable(Array.prototype.toString, "length");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/toString/name.js b/js/src/tests/test262/built-ins/Array/prototype/toString/name.js
new file mode 100644
index 0000000000..d3fc9528d9
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/toString/name.js
@@ -0,0 +1,28 @@
+// Copyright (C) 2015 André Bargull. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.tostring
+description: >
+  Array.prototype.toString.name is "toString".
+info: |
+  Array.prototype.toString ( )
+
+  17 ECMAScript Standard Built-in Objects:
+    Every built-in Function object, including constructors, that is not
+    identified as an anonymous function has a name property whose value
+    is a String.
+
+    Unless otherwise specified, the name property of a built-in Function
+    object, if it exists, has the attributes { [[Writable]]: false,
+    [[Enumerable]]: false, [[Configurable]]: true }.
+includes: [propertyHelper.js]
+---*/
+
+assert.sameValue(Array.prototype.toString.name, "toString");
+
+verifyNotEnumerable(Array.prototype.toString, "name");
+verifyNotWritable(Array.prototype.toString, "name");
+verifyConfigurable(Array.prototype.toString, "name");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/toString/non-callable-join-string-tag.js b/js/src/tests/test262/built-ins/Array/prototype/toString/non-callable-join-string-tag.js
new file mode 100644
index 0000000000..4b78762cd1
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/toString/non-callable-join-string-tag.js
@@ -0,0 +1,69 @@
+// Copyright (C) 2021 Alexey Shvayka. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.tostring
+description: >
+    If "join" value is non-callable, Object.prototype.toString intrinsic is called.
+info: |
+    Array.prototype.toString ( )
+
+    [...]
+    2. Let func be ? Get(array, "join").
+    3. If IsCallable(func) is false, set func to the intrinsic function %Object.prototype.toString%.
+    4. Return ? Call(func, array).
+features: [Symbol.toStringTag, Proxy, Reflect, BigInt]
+---*/
+
+assert(delete Object.prototype.toString);
+
+assert.sameValue(Array.prototype.toString.call({ join: null }), "[object Object]");
+assert.sameValue(Array.prototype.toString.call({ join: true }), "[object Object]");
+assert.sameValue(Array.prototype.toString.call({ join: 0 }), "[object Object]");
+assert.sameValue(Array.prototype.toString.call({ join: "join" }), "[object Object]");
+assert.sameValue(Array.prototype.toString.call({ join: Symbol() }), "[object Object]");
+assert.sameValue(Array.prototype.toString.call({ join: 0n }), "[object Object]");
+assert.sameValue(Array.prototype.toString.call({ join: {} }), "[object Object]");
+
+let revokeOnGet = false;
+const proxyTarget = [];
+const { proxy, revoke } = Proxy.revocable(proxyTarget, {
+    get: (target, key, receiver) => {
+        if (revokeOnGet)
+            revoke();
+        return Reflect.get(target, key, receiver);
+    },
+});
+
+proxyTarget.join = undefined;
+assert.sameValue(Array.prototype.toString.call(proxy), "[object Array]");
+revokeOnGet = true;
+assert.throws(TypeError, () => { Array.prototype.toString.call(proxy); });
+
+assert.sameValue(Array.prototype.toString.call((function() { return arguments; })()), "[object Arguments]");
+assert.sameValue(Array.prototype.toString.call(new Error), "[object Error]");
+assert.sameValue(Array.prototype.toString.call(new Boolean), "[object Boolean]");
+assert.sameValue(Array.prototype.toString.call(new Number), "[object Number]");
+assert.sameValue(Array.prototype.toString.call(new String), "[object String]");
+assert.sameValue(Array.prototype.toString.call(new Date), "[object Date]");
+assert.sameValue(Array.prototype.toString.call(new RegExp), "[object RegExp]");
+assert.sameValue(Array.prototype.toString.call(new Proxy(() => {}, {})), "[object Function]");
+assert.sameValue(Array.prototype.toString.call(new Proxy(new Date, {})), "[object Object]");
+assert.sameValue(Array.prototype.toString.call({ [Symbol.toStringTag]: "Foo" }), "[object Foo]");
+assert.sameValue(Array.prototype.toString.call(new Map), "[object Map]");
+
+RegExp.prototype[Symbol.toStringTag] = "Foo";
+assert.sameValue(Array.prototype.toString.call(new RegExp), "[object Foo]");
+Number.prototype[Symbol.toStringTag] = Object("Foo"); // ignored
+assert.sameValue(Array.prototype.toString.call(new Number), "[object Number]");
+
+Object.defineProperty(JSON, Symbol.toStringTag, { value: "Foo" });
+assert.sameValue(Array.prototype.toString.call(JSON), "[object Foo]");
+
+assert(delete Set.prototype[Symbol.toStringTag]);
+assert.sameValue(Array.prototype.toString.call(new Set), "[object Object]");
+
+Object.defineProperty(Object.prototype, Symbol.toStringTag, { get: () => { throw new Test262Error(); } });
+assert.throws(Test262Error, () => { Array.prototype.toString.call({}); });
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/toString/not-a-constructor.js b/js/src/tests/test262/built-ins/Array/prototype/toString/not-a-constructor.js
new file mode 100644
index 0000000000..a70534ffd1
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/toString/not-a-constructor.js
@@ -0,0 +1,35 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Array.prototype.toString does not implement [[Construct]], is not new-able
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+
+  sec-evaluatenew
+
+  ...
+  7. If IsConstructor(constructor) is false, throw a TypeError exception.
+  ...
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Array.prototype.toString),
+  false,
+  'isConstructor(Array.prototype.toString) must return false'
+);
+
+assert.throws(TypeError, () => {
+  new Array.prototype.toString();
+}, '`new Array.prototype.toString()` throws TypeError');
+
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/toString/prop-desc.js b/js/src/tests/test262/built-ins/Array/prototype/toString/prop-desc.js
new file mode 100644
index 0000000000..d767d72252
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/toString/prop-desc.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2017 Leo Balter. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.tostring
+description: >
+  "toString" property of Array.prototype
+info: |
+  17 ECMAScript Standard Built-in Objects
+  
+  Every other data property described in clauses 18 through 26 and in Annex B.2
+  has the attributes { [[Writable]]: true, [[Enumerable]]: false,
+    [[Configurable]]: true } unless otherwise specified.
+includes: [propertyHelper.js]
+---*/
+
+assert.sameValue(typeof Array.prototype.toString, 'function', 'typeof');
+
+verifyNotEnumerable(Array.prototype, "toString");
+verifyWritable(Array.prototype, "toString");
+verifyConfigurable(Array.prototype, "toString");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/toString/shell.js b/js/src/tests/test262/built-ins/Array/prototype/toString/shell.js
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/js/src/tests/test262/built-ins/Array/prototype/unshift/S15.4.4.13_A1_T1.js b/js/src/tests/test262/built-ins/Array/prototype/unshift/S15.4.4.13_A1_T1.js
new file mode 100644
index 0000000000..121386346c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/unshift/S15.4.4.13_A1_T1.js
@@ -0,0 +1,49 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    The arguments are prepended to the start of the array, such that
+    their order within the array is the same as the order in which they appear in
+    the argument list
+esid: sec-array.prototype.unshift
+description: Checking case when unsift is given no arguments or one argument
+---*/
+
+var x = new Array();
+var unshift = x.unshift(1);
+if (unshift !== 1) {
+  throw new Test262Error('#1: x = new Array(); x.unshift(1) === 1. Actual: ' + (unshift));
+}
+
+if (x[0] !== 1) {
+  throw new Test262Error('#2: x = new Array(); x.unshift(1); x[0] === 1. Actual: ' + (x[0]));
+}
+
+var unshift = x.unshift();
+if (unshift !== 1) {
+  throw new Test262Error('#3: x = new Array(); x.unshift(1); x.unshift() === 1. Actual: ' + (unshift));
+}
+
+if (x[1] !== undefined) {
+  throw new Test262Error('#4: x = new Array(); x.unshift(1); x.unshift(); x[1] === unedfined. Actual: ' + (x[1]));
+}
+
+var unshift = x.unshift(-1);
+if (unshift !== 2) {
+  throw new Test262Error('#5: x = new Array(); x.unshift(1); x.unshift(); x.unshift(-1) === 2. Actual: ' + (unshift));
+}
+
+if (x[0] !== -1) {
+  throw new Test262Error('#6: x = new Array(); x.unshift(1); x.unshift(-1); x[0] === -1. Actual: ' + (x[0]));
+}
+
+if (x[1] !== 1) {
+  throw new Test262Error('#7: x = new Array(); x.unshift(1); x.unshift(-1); x[1] === 1. Actual: ' + (x[1]));
+}
+
+if (x.length !== 2) {
+  throw new Test262Error('#8: x = new Array(); x.unshift(1); x.unshift(); x.unshift(-1); x.length === 2. Actual: ' + (x.length));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/unshift/S15.4.4.13_A1_T2.js b/js/src/tests/test262/built-ins/Array/prototype/unshift/S15.4.4.13_A1_T2.js
new file mode 100644
index 0000000000..be04543498
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/unshift/S15.4.4.13_A1_T2.js
@@ -0,0 +1,52 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    The arguments are prepended to the start of the array, such that
+    their order within the array is the same as the order in which they appear in
+    the argument list
+esid: sec-array.prototype.unshift
+description: Checking case when unsift is given many arguments
+---*/
+
+var x = [];
+if (x.length !== 0) {
+  throw new Test262Error('#1: x = []; x.length === 0. Actual: ' + (x.length));
+}
+
+x[0] = 0;
+var unshift = x.unshift(true, Number.POSITIVE_INFINITY, "NaN", "1", -1);
+if (unshift !== 6) {
+  throw new Test262Error('#2: x = []; x[0] = 0; x.unshift(true, Number.POSITIVE_INFINITY, "NaN", "1", -1) === 6. Actual: ' + (unshift));
+}
+
+if (x[5] !== 0) {
+  throw new Test262Error('#3: x = []; x[0] = 0; x.unshift(true, Number.POSITIVE_INFINITY, "NaN", "1", -1); x[5] === 0. Actual: ' + (x[5]));
+}
+
+if (x[0] !== true) {
+  throw new Test262Error('#4: x = []; x[0] = 0; x.unshift(true, Number.POSITIVE_INFINITY, "NaN", "1", -1); x[0] === true. Actual: ' + (x[0]));
+}
+
+if (x[1] !== Number.POSITIVE_INFINITY) {
+  throw new Test262Error('#5: x = []; x[0] = 0; x.unshift(true, Number.POSITIVE_INFINITY, "NaN", "1", -1); x[1] === Number.POSITIVE_INFINITY. Actual: ' + (x[1]));
+}
+
+if (x[2] !== "NaN") {
+  throw new Test262Error('#6: x = []; x[0] = 0; x.unshift(true, Number.POSITIVE_INFINITY, "NaN", "1", -1); x[2] === "NaN". Actual: ' + (x[2]));
+}
+
+if (x[3] !== "1") {
+  throw new Test262Error('#7: x = []; x[0] = 0; x.unshift(true, Number.POSITIVE_INFINITY, "NaN", "1", -1); x[3] === "1". Actual: ' + (x[3]));
+}
+
+if (x[4] !== -1) {
+  throw new Test262Error('#8: x = []; x[0] = 0; x.unshift(true, Number.POSITIVE_INFINITY, "NaN", "1", -1); x[4] === -1. Actual: ' + (x[4]));
+}
+
+if (x.length !== 6) {
+  throw new Test262Error('#9: x = []; x[0] = 0; x.unshift(true, Number.POSITIVE_INFINITY, "NaN", "1", -1); x.length === 6. Actual: ' + (x.length));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/unshift/S15.4.4.13_A2_T1.js b/js/src/tests/test262/built-ins/Array/prototype/unshift/S15.4.4.13_A2_T1.js
new file mode 100644
index 0000000000..272764f70d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/unshift/S15.4.4.13_A2_T1.js
@@ -0,0 +1,61 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    The unshift function is intentionally generic.
+    It does not require that its this value be an Array object
+esid: sec-array.prototype.unshift
+description: >
+    The arguments are prepended to the start of the array, such that
+    their order within the array is the same as the order in which
+    they appear in  the argument list
+---*/
+
+var obj = {};
+obj.unshift = Array.prototype.unshift;
+
+if (obj.length !== undefined) {
+  throw new Test262Error('#0: var obj = {}; obj.length === undefined. Actual: ' + (obj.length));
+} else {
+    var unshift = obj.unshift(-1);
+  if (unshift !== 1) {
+    throw new Test262Error('#1: var obj = {}; obj.unshift = Array.prototype.unshift; obj.unshift(-1) === 1. Actual: ' + (unshift));
+  }
+    if (obj.length !== 1) {
+    throw new Test262Error('#2: var obj = {}; obj.unshift = Array.prototype.unshift; obj.unshift(-1); obj.length === 1. Actual: ' + (obj.length));
+  }
+    if (obj["0"] !== -1) {
+    throw new Test262Error('#3: var obj = {}; obj.unshift = Array.prototype.unshift; obj.unshift(-1); obj["0"] === -1. Actual: ' + (obj["0"]));
+  }
+}
+
+obj.length = undefined;
+var unshift = obj.unshift(-4);
+if (unshift !== 1) {
+  throw new Test262Error('#4: var obj = {}; obj.length = undefined; obj.unshift = Array.prototype.unshift; obj.unshift(-4) === 1. Actual: ' + (unshift));
+}
+
+if (obj.length !== 1) {
+  throw new Test262Error('#5: var obj = {}; obj.length = undefined; obj.unshift = Array.prototype.unshift; obj.unshift(-4); obj.length === 1. Actual: ' + (obj.length));
+}
+
+if (obj["0"] !== -4) {
+  throw new Test262Error('#6: var obj = {}; obj.length = undefined; obj.unshift = Array.prototype.unshift; obj.unshift(-4); obj["0"] === -4. Actual: ' + (obj["0"]));
+}
+
+obj.length = null
+var unshift = obj.unshift(-7);
+if (unshift !== 1) {
+  throw new Test262Error('#7: var obj = {}; obj.length = null; obj.unshift = Array.prototype.unshift; obj.unshift(-7) === 1. Actual: ' + (unshift));
+}
+
+if (obj.length !== 1) {
+  throw new Test262Error('#8: var obj = {}; obj.length = null; obj.unshift = Array.prototype.unshift; obj.unshift(-7); obj.length === 1. Actual: ' + (obj.length));
+}
+
+if (obj["0"] !== -7) {
+  throw new Test262Error('#9: var obj = {}; obj.length = null; obj.unshift = Array.prototype.unshift; obj.unshift(-7); obj["0"] === -7. Actual: ' + (obj["0"]));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/unshift/S15.4.4.13_A2_T2.js b/js/src/tests/test262/built-ins/Array/prototype/unshift/S15.4.4.13_A2_T2.js
new file mode 100644
index 0000000000..152ab6e247
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/unshift/S15.4.4.13_A2_T2.js
@@ -0,0 +1,88 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    The unshift function is intentionally generic.
+    It does not require that its this value be an Array object
+esid: sec-array.prototype.unshift
+description: >
+    The arguments are prepended to the start of the array, such that
+    their order within the array is the same as the order in which
+    they appear in  the argument list
+---*/
+
+var obj = {};
+obj.unshift = Array.prototype.unshift;
+
+obj.length = NaN;
+var unshift = obj.unshift(-1);
+if (unshift !== 1) {
+  throw new Test262Error('#1: var obj = {}; obj.length = NaN; obj.unshift = Array.prototype.unshift; obj.unshift(-1) === 1. Actual: ' + (unshift));
+}
+
+if (obj.length !== 1) {
+  throw new Test262Error('#2: var obj = {}; obj.length = NaN; obj.unshift = Array.prototype.unshift; obj.unshift(-1); obj.length === 1. Actual: ' + (obj.length));
+}
+
+if (obj["0"] !== -1) {
+  throw new Test262Error('#3: var obj = {}; obj.length = NaN; obj.unshift = Array.prototype.unshift; obj.unshift(-1); obj["0"] === -1. Actual: ' + (obj["0"]));
+}
+
+obj.length = Number.NEGATIVE_INFINITY;
+var unshift = obj.unshift(-7);
+if (unshift !== 1) {
+  throw new Test262Error('#7: var obj = {}; obj.length = Number.NEGATIVE_INFINITY; obj.unshift = Array.prototype.unshift; obj.unshift(-7) === 1. Actual: ' + (unshift));
+}
+
+if (obj.length !== 1) {
+  throw new Test262Error('#8: var obj = {}; obj.length = Number.NEGATIVE_INFINITY; obj.unshift = Array.prototype.unshift; obj.unshift(-7); obj.length === 1. Actual: ' + (obj.length));
+}
+
+if (obj["0"] !== -7) {
+  throw new Test262Error('#9: var obj = {}; obj.length = Number.NEGATIVE_INFINITY; obj.unshift = Array.prototype.unshift; obj.unshift(-7); obj["0"] === -7. Actual: ' + (obj["0"]));
+}
+
+obj.length = 0.5;
+var unshift = obj.unshift(-10);
+if (unshift !== 1) {
+  throw new Test262Error('#10: var obj = {}; obj.length = 0.5; obj.unshift = Array.prototype.unshift; obj.unshift(-10) === 1. Actual: ' + (unshift));
+}
+
+if (obj.length !== 1) {
+  throw new Test262Error('#11: var obj = {}; obj.length = 0.5; obj.unshift = Array.prototype.unshift; obj.unshift(-10); obj.length === 1. Actual: ' + (obj.length));
+}
+
+if (obj["0"] !== -10) {
+  throw new Test262Error('#12: var obj = {}; obj.length = 0.5; obj.unshift = Array.prototype.unshift; obj.unshift(-10); obj["0"] === -10. Actual: ' + (obj["0"]));
+}
+
+obj.length = 1.5;
+var unshift = obj.unshift(-13);
+if (unshift !== 2) {
+  throw new Test262Error('#13: var obj = {}; obj.length = 1.5; obj.unshift = Array.prototype.unshift; obj.unshift(-13) === 2. Actual: ' + (unshift));
+}
+
+if (obj.length !== 2) {
+  throw new Test262Error('#14: var obj = {}; obj.length = 1.5; obj.unshift = Array.prototype.unshift; obj.unshift(-13); obj.length === 2. Actual: ' + (obj.length));
+}
+
+if (obj["0"] !== -13) {
+  throw new Test262Error('#15: var obj = {}; obj.length = 1.5; obj.unshift = Array.prototype.unshift; obj.unshift(-13); obj["0"] === -13. Actual: ' + (obj["0"]));
+}
+
+obj.length = new Number(0);
+var unshift = obj.unshift(-16);
+if (unshift !== 1) {
+  throw new Test262Error('#16: var obj = {}; obj.length = new Number(0); obj.unshift = Array.prototype.unshift; obj.unshift(-16) === 1. Actual: ' + (unshift));
+}
+
+if (obj.length !== 1) {
+  throw new Test262Error('#17: var obj = {}; obj.length = new Number(0); obj.unshift = Array.prototype.unshift; obj.unshift(-16); obj.length === 1. Actual: ' + (obj.length));
+}
+
+if (obj["0"] !== -16) {
+  throw new Test262Error('#18: var obj = {}; obj.length = new Number(0); obj.unshift = Array.prototype.unshift; obj.unshift(-16); obj["0"] === -16. Actual: ' + (obj["0"]));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/unshift/S15.4.4.13_A2_T3.js b/js/src/tests/test262/built-ins/Array/prototype/unshift/S15.4.4.13_A2_T3.js
new file mode 100644
index 0000000000..8979724e9b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/unshift/S15.4.4.13_A2_T3.js
@@ -0,0 +1,120 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    The unshift function is intentionally generic.
+    It does not require that its this value be an Array object
+esid: sec-array.prototype.unshift
+description: >
+    Operator use ToNumber from length.  If Type(value) is Object,
+    evaluate ToPrimitive(value, Number)
+---*/
+
+var obj = {};
+obj.unshift = Array.prototype.unshift;
+
+obj.length = {
+  valueOf() {
+    return 3
+  }
+};
+var unshift = obj.unshift();
+assert.sameValue(unshift, 3, 'The value of unshift is expected to be 3');
+
+obj.length = {
+  valueOf() {
+    return 3
+  },
+  toString() {
+    return 1
+  }
+};
+var unshift = obj.unshift();
+assert.sameValue(unshift, 3, 'The value of unshift is expected to be 3');
+
+obj.length = {
+  valueOf() {
+    return 3
+  },
+  toString() {
+    return {}
+  }
+};
+var unshift = obj.unshift();
+assert.sameValue(unshift, 3, 'The value of unshift is expected to be 3');
+
+try {
+  obj.length = {
+    valueOf() {
+      return 3
+    },
+    toString() {
+      throw "error"
+    }
+  };
+  var unshift = obj.unshift();
+  assert.sameValue(unshift, 3, 'The value of unshift is expected to be 3');
+}
+catch (e) {
+  assert.notSameValue(e, "error", 'The value of e is not "error"');
+}
+
+obj.length = {
+  toString() {
+    return 1
+  }
+};
+var unshift = obj.unshift();
+assert.sameValue(unshift, 1, 'The value of unshift is expected to be 1');
+
+obj.length = {
+  valueOf() {
+    return {}
+  },
+  toString() {
+    return 1
+  }
+}
+var unshift = obj.unshift();
+assert.sameValue(unshift, 1, 'The value of unshift is expected to be 1');
+
+try {
+
+  obj.length = {
+    valueOf() {
+      throw "error"
+    },
+    toString() {
+      return 1
+    }
+  };
+  var unshift = obj.unshift();
+  throw new Test262Error('#7.1:  obj.length = {valueOf() {throw "error"}, toString() {return 1}}; obj.unshift() throw "error". Actual: ' + (unshift));
+}
+catch (e) {
+  assert.sameValue(e, "error", 'The value of e is expected to be "error"');
+}
+
+try {
+
+  obj.length = {
+    valueOf() {
+      return {}
+    },
+    toString() {
+      return {}
+    }
+  };
+  var unshift = obj.unshift();
+  throw new Test262Error('#8.1:  obj.length = {valueOf() {return {}}, toString() {return {}}}  obj.unshift() throw TypeError. Actual: ' + (unshift));
+}
+catch (e) {
+  assert.sameValue(
+    e instanceof TypeError,
+    true,
+    'The result of evaluating (e instanceof TypeError) is expected to be true'
+  );
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/unshift/S15.4.4.13_A3_T2.js b/js/src/tests/test262/built-ins/Array/prototype/unshift/S15.4.4.13_A3_T2.js
new file mode 100644
index 0000000000..1634da4c16
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/unshift/S15.4.4.13_A3_T2.js
@@ -0,0 +1,40 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: Check ToLength(length) for non Array objects
+esid: sec-array.prototype.unshift
+description: length = -4294967295
+---*/
+
+var obj = {};
+obj.unshift = Array.prototype.unshift;
+obj[0] = "";
+obj.length = -4294967295;
+
+var unshift = obj.unshift("x", "y", "z");
+if (unshift !== 3) {
+  throw new Test262Error('#1: var obj = {}; obj.unshift = Array.prototype.unshift; obj[0] = ""; obj.length = -4294967295; obj.unshift("x", "y", "z") === 3. Actual: ' + (unshift));
+}
+
+if (obj.length !== 3) {
+  throw new Test262Error('#2: var obj = {}; obj.unshift = Array.prototype.unshift; obj[0] = ""; obj.length = -4294967295; obj.unshift("x", "y", "z"); obj.length === 3. Actual: ' + (obj.length));
+}
+
+if (obj[0] !== "x") {
+  throw new Test262Error('#3: var obj = {}; obj.unshift = Array.prototype.unshift; obj[0] = ""; obj.length = -4294967295; obj.unshift("x", "y", "z"); obj[0] === "x". Actual: ' + (obj[0]));
+}
+
+if (obj[1] !== "y") {
+  throw new Test262Error('#4: var obj = {}; obj.unshift = Array.prototype.unshift; obj[0] = ""; obj.length = -4294967295; obj.unshift("x", "y", "z"); obj[1] === "y". Actual: ' + (obj[1]));
+}
+
+if (obj[2] !== "z") {
+  throw new Test262Error('#5: var obj = {}; obj.unshift = Array.prototype.unshift; obj[0] = ""; obj.length = -4294967295; obj.unshift("x", "y", "z"); obj[2] === "z". Actual: ' + (obj[2]));
+}
+
+if (obj[3] !== undefined) {
+  throw new Test262Error('#6: var obj = {}; obj.unshift = Array.prototype.unshift; obj[0] = ""; obj.length = -4294967295; obj.unshift("x", "y", "z"); obj[3] === undefined. Actual: ' + (obj[3]));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/unshift/S15.4.4.13_A4_T1.js b/js/src/tests/test262/built-ins/Array/prototype/unshift/S15.4.4.13_A4_T1.js
new file mode 100644
index 0000000000..fb0cdeb78e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/unshift/S15.4.4.13_A4_T1.js
@@ -0,0 +1,70 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: "[[Get]], [[Delete]] from not an inherited property"
+esid: sec-array.prototype.unshift
+description: >
+    [[Prototype]] of Array instance is Array.prototype, [[Prototype]
+    of Array.prototype is Object.prototype
+---*/
+
+Array.prototype[0] = -1;
+var x = [1];
+x.length = 1;
+
+var unshift = x.unshift(0);
+if (unshift !== 2) {
+  throw new Test262Error('#1: Array.prototype[0] = -1; x = [1]; x.length = 1; x.unshift(0) === 2. Actual: ' + (unshift));
+}
+
+if (x[0] !== 0) {
+  throw new Test262Error('#2: Array.prototype[0] = -1; x = [1]; x.length = 1; x.unshift(0); x[0] === 0. Actual: ' + (x[0]));
+}
+
+if (x[1] !== 1) {
+  throw new Test262Error('#3: Array.prototype[0] = -1; x = [1]; x.length = 1; x.unshift(0); x[1] === 1. Actual: ' + (x[1]));
+}
+
+delete x[0];
+
+if (x[0] !== -1) {
+  throw new Test262Error('#4: Array.prototype[0] = -1; x = [1]; x.length = 1; x.unshift(0); delete x[0]; x[0] === -1. Actual: ' + (x[0]));
+}
+
+Object.prototype[0] = -1;
+Object.prototype.length = 1;
+Object.prototype.unshift = Array.prototype.unshift;
+x = {
+  0: 1
+};
+
+var unshift = x.unshift(0);
+if (unshift !== 2) {
+  throw new Test262Error('#5: Object.prototype[0] = -1; Object.prototype.length = 1; Object.prototype.unshift = Array.prototype.unshift; x = {0:0}; x.unshift(0) === 2. Actual: ' + (unshift));
+}
+
+if (x[0] !== 0) {
+  throw new Test262Error('#6: Object.prototype[0] = -1; Object.prototype.length = 1; Object.prototype.unshift = Array.prototype.unshift; x = {0:0}; x.unshift(0); x[0] === 0. Actual: ' + (x[0]));
+}
+
+if (x[1] !== 1) {
+  throw new Test262Error('#7: Object.prototype[0] = -1; Object.prototype.length = 1; Object.prototype.unshift = Array.prototype.unshift; x = {0:0}; x.unshift(0); x[1] === 1. Actual: ' + (x[1]));
+}
+
+delete x[0];
+
+if (x[0] !== -1) {
+  throw new Test262Error('#8: Object.prototype[0] = -1; Object.prototype.length = 1; Object.prototype.unshift = Array.prototype.unshift; x = {0:0}; x.unshift(0); delete x[0]; x[0] === -1. Actual: ' + (x[0]));
+}
+
+if (x.length !== 2) {
+  throw new Test262Error('#9: Object.prototype[0] = -1; Object.prototype.length = 1; Object.prototype.unshift = Array.prototype.unshift; x = {0:0}; x.unshift(0); x.length === 1. Actual: ' + (x.length));
+}
+
+delete x.length;
+if (x.length !== 1) {
+  throw new Test262Error('#10: Object.prototype[1] = -1; Object.prototype.length = 1; Object.prototype.unshift = Array.prototype.unshift; x = {0:0}; x.unshift(0); delete x; x.length === 1. Actual: ' + (x.length));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/unshift/S15.4.4.13_A4_T2.js b/js/src/tests/test262/built-ins/Array/prototype/unshift/S15.4.4.13_A4_T2.js
new file mode 100644
index 0000000000..bc63e8cf66
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/unshift/S15.4.4.13_A4_T2.js
@@ -0,0 +1,68 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: "[[Get]], [[Delete]] from not an inherited property"
+esid: sec-array.prototype.unshift
+description: >
+    [[Prototype]] of Array instance is Array.prototype, [[Prototype]
+    of Array.prototype is Object.prototype
+---*/
+
+Array.prototype[0] = 1;
+var x = [];
+x.length = 1;
+
+var unshift = x.unshift(0);
+if (unshift !== 2) {
+  throw new Test262Error('#1: Array.prototype[0] = 1; x = []; x.length = 1; x.unshift(0) === 2. Actual: ' + (unshift));
+}
+
+if (x[0] !== 0) {
+  throw new Test262Error('#2: Array.prototype[0] = 1; x = []; x.length = 1; x.unshift(0); x[0] === 0. Actual: ' + (x[0]));
+}
+
+if (x[1] !== 1) {
+  throw new Test262Error('#3: Array.prototype[0] = 1; x = []; x.length = 1; x.unshift(0); x[1] === 1. Actual: ' + (x[1]));
+}
+
+delete x[0];
+
+if (x[0] !== 1) {
+  throw new Test262Error('#4: Array.prototype[0] = 1; x = [1]; x.length = 1; x.unshift(0); delete x[0]; x[0] === 1. Actual: ' + (x[0]));
+}
+
+Object.prototype[0] = 1;
+Object.prototype.length = 1;
+Object.prototype.unshift = Array.prototype.unshift;
+x = {};
+
+var unshift = x.unshift(0);
+if (unshift !== 2) {
+  throw new Test262Error('#5: Object.prototype[0] = 1; Object.prototype.length = 1; Object.prototype.unshift = Array.prototype.unshift; x = {}; x.unshift(0) === 2. Actual: ' + (unshift));
+}
+
+if (x[0] !== 0) {
+  throw new Test262Error('#6: Object.prototype[0] = 1; Object.prototype.length = 1; Object.prototype.unshift = Array.prototype.unshift; x = {}; x.unshift(0); x[0] === 0. Actual: ' + (x[0]));
+}
+
+if (x[1] !== 1) {
+  throw new Test262Error('#7: Object.prototype[0] = 1; Object.prototype.length = 1; Object.prototype.unshift = Array.prototype.unshift; x = {}; x.unshift(0); x[1] === 1. Actual: ' + (x[1]));
+}
+
+delete x[0];
+
+if (x[0] !== 1) {
+  throw new Test262Error('#8: Object.prototype[0] = 1; Object.prototype.length = 1; Object.prototype.unshift = Array.prototype.unshift; x = {}; x.unshift(0); delete x[0]; x[0] === 1. Actual: ' + (x[0]));
+}
+
+if (x.length !== 2) {
+  throw new Test262Error('#9: Object.prototype[0] = 1; Object.prototype.length = 1; Object.prototype.unshift = Array.prototype.unshift; x = {}; x.unshift(0); x.length === 1. Actual: ' + (x.length));
+}
+
+delete x.length;
+if (x.length !== 1) {
+  throw new Test262Error('#10: Object.prototype[1] = 1; Object.prototype.length = 1; Object.prototype.unshift = Array.prototype.unshift; x = {}; x.unshift(0); delete x; x.length === 1. Actual: ' + (x.length));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/unshift/browser.js b/js/src/tests/test262/built-ins/Array/prototype/unshift/browser.js
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/js/src/tests/test262/built-ins/Array/prototype/unshift/call-with-boolean.js b/js/src/tests/test262/built-ins/Array/prototype/unshift/call-with-boolean.js
new file mode 100644
index 0000000000..1d01b147ec
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/unshift/call-with-boolean.js
@@ -0,0 +1,12 @@
+// Copyright (c) 2020 Rick Waldron.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.unshift
+description: Array.prototype.unshift applied to boolean primitive
+---*/
+
+assert.sameValue(Array.prototype.unshift.call(true), 0, 'Array.prototype.unshift.call(true) must return 0');
+assert.sameValue(Array.prototype.unshift.call(false), 0, 'Array.prototype.unshift.call(false) must return 0');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/unshift/clamps-to-integer-limit.js b/js/src/tests/test262/built-ins/Array/prototype/unshift/clamps-to-integer-limit.js
new file mode 100644
index 0000000000..82c3056f5e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/unshift/clamps-to-integer-limit.js
@@ -0,0 +1,35 @@
+// Copyright (C) 2017 André Bargull. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.unshift
+description: >
+  Length values exceeding 2^53-1 are clamped to 2^53-1.
+info: |
+  1. ...
+  2. Let len be ? ToLength(? Get(O, "length")).
+  3. Let argCount be the number of actual arguments.
+  4. If argCount > 0, then ...
+  5. Perform ? Set(O, "length", len+argCount, true).
+features: [exponentiation]
+---*/
+
+var arrayLike = {};
+
+arrayLike.length = 2 ** 53 - 1;
+Array.prototype.unshift.call(arrayLike);
+assert.sameValue(arrayLike.length, 2 ** 53 - 1, "Length is 2**53 - 1");
+
+arrayLike.length = 2 ** 53;
+Array.prototype.unshift.call(arrayLike);
+assert.sameValue(arrayLike.length, 2 ** 53 - 1, "Length is 2**53");
+
+arrayLike.length = 2 ** 53 + 2;
+Array.prototype.unshift.call(arrayLike);
+assert.sameValue(arrayLike.length, 2 ** 53 - 1, "Length is 2**53 + 2");
+
+arrayLike.length = Infinity;
+Array.prototype.unshift.call(arrayLike);
+assert.sameValue(arrayLike.length, 2 ** 53 - 1, "Length is Infinity");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/unshift/length-near-integer-limit.js b/js/src/tests/test262/built-ins/Array/prototype/unshift/length-near-integer-limit.js
new file mode 100644
index 0000000000..f73b36e447
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/unshift/length-near-integer-limit.js
@@ -0,0 +1,63 @@
+// Copyright (C) 2017 André Bargull. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.unshift
+description: >
+  Test properties are correctly accessed when length property is near 2^53-1.
+info: |
+  2. Let len be ? ToLength(? Get(O, "length")).
+  3. Let argCount be the number of actual arguments.
+  4. If argCount > 0, then
+    ...
+    b. Let k be len.
+    c. Repeat, while k > 0,
+        i. Let from be ! ToString(k-1).
+       ii. Let to be ! ToString(k+argCount-1).
+      iii. Let fromPresent be ? HasProperty(O, from).
+       iv. If fromPresent is true, then
+          1. Let fromValue be ? Get(O, from).
+          2. Perform ? Set(O, to, fromValue, true).
+        v. Else fromPresent is false,
+          1. Perform ? DeletePropertyOrThrow(O, to).
+       vi. Decrease k by 1.
+features: [exponentiation]
+---*/
+
+function StopUnshift() {}
+
+var arrayLike = {
+  get "9007199254740986" () {
+    throw new StopUnshift();
+  },
+  "9007199254740987": "9007199254740987",
+  /* "9007199254740988": hole */
+  "9007199254740989": "9007199254740989",
+  /* "9007199254740990": empty */
+  "9007199254740991": "9007199254740991",
+  length: 2 ** 53 - 2
+};
+
+assert.throws(StopUnshift, function() {
+  Array.prototype.unshift.call(arrayLike, null);
+});
+
+assert.sameValue(arrayLike.length, 2 ** 53 - 2,
+  "arrayLike.length is unchanged");
+
+assert.sameValue(arrayLike["9007199254740987"], "9007199254740987",
+  "arrayLike['9007199254740987'] is unchanged");
+
+assert.sameValue(arrayLike["9007199254740988"], "9007199254740987",
+  "arrayLike['9007199254740988'] is replaced with arrayLike['9007199254740987']");
+
+assert.sameValue("9007199254740989" in arrayLike, false,
+  "arrayLike['9007199254740989'] is removed");
+
+assert.sameValue(arrayLike["9007199254740990"], "9007199254740989",
+  "arrayLike['9007199254740990'] is replaced with arrayLike['9007199254740989']");
+
+assert.sameValue(arrayLike["9007199254740991"], "9007199254740991",
+  "arrayLike['9007199254740991'] is unchanged");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/unshift/length.js b/js/src/tests/test262/built-ins/Array/prototype/unshift/length.js
new file mode 100644
index 0000000000..e99bffa6d8
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/unshift/length.js
@@ -0,0 +1,34 @@
+// Copyright (C) 2017 Leo Balter. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.unshift
+description: >
+  The "length" property of Array.prototype.unshift
+info: |
+  22.1.3.29 Array.prototype.unshift ( ...items )
+
+  The length property of the unshift method is 1.
+
+  17 ECMAScript Standard Built-in Objects
+
+  Every built-in function object, including constructors, has a length property
+  whose value is an integer. Unless otherwise specified, this value is equal to
+  the largest number of named arguments shown in the subclause headings for the
+  function description. Optional parameters (which are indicated with brackets:
+  [ ]) or rest parameters (which are shown using the form «...name») are not
+  included in the default argument count.
+
+  Unless otherwise specified, the length property of a built-in function object
+  has the attributes { [[Writable]]: false, [[Enumerable]]: false,
+    [[Configurable]]: true }.
+includes: [propertyHelper.js]
+---*/
+
+assert.sameValue(Array.prototype.unshift.length, 1);
+
+verifyNotEnumerable(Array.prototype.unshift, 'length');
+verifyNotWritable(Array.prototype.unshift, 'length');
+verifyConfigurable(Array.prototype.unshift, 'length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/unshift/name.js b/js/src/tests/test262/built-ins/Array/prototype/unshift/name.js
new file mode 100644
index 0000000000..4caa8c29b4
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/unshift/name.js
@@ -0,0 +1,28 @@
+// Copyright (C) 2015 André Bargull. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.unshift
+description: >
+  Array.prototype.unshift.name is "unshift".
+info: |
+  Array.prototype.unshift ( ...items )
+
+  17 ECMAScript Standard Built-in Objects:
+    Every built-in Function object, including constructors, that is not
+    identified as an anonymous function has a name property whose value
+    is a String.
+
+    Unless otherwise specified, the name property of a built-in Function
+    object, if it exists, has the attributes { [[Writable]]: false,
+    [[Enumerable]]: false, [[Configurable]]: true }.
+includes: [propertyHelper.js]
+---*/
+
+assert.sameValue(Array.prototype.unshift.name, "unshift");
+
+verifyNotEnumerable(Array.prototype.unshift, "name");
+verifyNotWritable(Array.prototype.unshift, "name");
+verifyConfigurable(Array.prototype.unshift, "name");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/unshift/not-a-constructor.js b/js/src/tests/test262/built-ins/Array/prototype/unshift/not-a-constructor.js
new file mode 100644
index 0000000000..415a6e738d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/unshift/not-a-constructor.js
@@ -0,0 +1,35 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Array.prototype.unshift does not implement [[Construct]], is not new-able
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+
+  sec-evaluatenew
+
+  ...
+  7. If IsConstructor(constructor) is false, throw a TypeError exception.
+  ...
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Array.prototype.unshift),
+  false,
+  'isConstructor(Array.prototype.unshift) must return false'
+);
+
+assert.throws(TypeError, () => {
+  new Array.prototype.unshift();
+}, '`new Array.prototype.unshift()` throws TypeError');
+
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/unshift/prop-desc.js b/js/src/tests/test262/built-ins/Array/prototype/unshift/prop-desc.js
new file mode 100644
index 0000000000..6eee7edd19
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/unshift/prop-desc.js
@@ -0,0 +1,23 @@
+// Copyright (C) 2017 Leo Balter. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.unshift
+description: >
+  "unshift" property of Array.prototype
+info: |
+  17 ECMAScript Standard Built-in Objects
+  
+  Every other data property described in clauses 18 through 26 and in Annex B.2
+  has the attributes { [[Writable]]: true, [[Enumerable]]: false,
+    [[Configurable]]: true } unless otherwise specified.
+includes: [propertyHelper.js]
+---*/
+
+assert.sameValue(typeof Array.prototype.unshift, 'function', 'typeof');
+
+verifyNotEnumerable(Array.prototype, "unshift");
+verifyWritable(Array.prototype, "unshift");
+verifyConfigurable(Array.prototype, "unshift");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/unshift/set-length-array-is-frozen.js b/js/src/tests/test262/built-ins/Array/prototype/unshift/set-length-array-is-frozen.js
new file mode 100644
index 0000000000..912e021aaa
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/unshift/set-length-array-is-frozen.js
@@ -0,0 +1,50 @@
+// Copyright (C) 2022 Apple Inc. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.unshift
+description: >
+  A TypeError is thrown when "length" is [[Set]] on a frozen array.
+info: |
+  Array.prototype.unshift ( ...items )
+
+  [...]
+  4. If argCount > 0, then
+    [...]
+    d. Let j be +0𝔽.
+    e. For each element E of items, do
+        i. Perform ? Set(O, ! ToString(j), E, true).
+        ii. Set j to j + 1𝔽.
+  5. Perform ? Set(O, "length", 𝔽(len + argCount), true).
+
+  OrdinarySetWithOwnDescriptor ( O, P, V, Receiver, ownDesc )
+
+  [...]
+  2. If IsDataDescriptor(ownDesc) is true, then
+    a. If ownDesc.[[Writable]] is false, return false.
+
+  Set ( O, P, V, Throw )
+
+  [...]
+  1. Let success be ? O.[[Set]](P, V, O).
+  2. If success is false and Throw is true, throw a TypeError exception.
+---*/
+
+var array = [];
+var arrayPrototypeSet0Calls = 0;
+
+Object.defineProperty(Array.prototype, "0", {
+  set(_val) {
+    Object.freeze(array);
+    arrayPrototypeSet0Calls++;
+  },
+});
+
+assert.throws(TypeError, function() {
+  array.unshift(1);
+});
+
+assert(!array.hasOwnProperty(0));
+assert.sameValue(array.length, 0);
+assert.sameValue(arrayPrototypeSet0Calls, 1);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/unshift/set-length-array-length-is-non-writable.js b/js/src/tests/test262/built-ins/Array/prototype/unshift/set-length-array-length-is-non-writable.js
new file mode 100644
index 0000000000..9ce38b5d93
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/unshift/set-length-array-length-is-non-writable.js
@@ -0,0 +1,50 @@
+// Copyright (C) 2022 Apple Inc. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.unshift
+description: >
+  A TypeError is thrown when "length" is [[Set]] on an array with non-writable "length".
+info: |
+  Array.prototype.unshift ( ...items )
+
+  [...]
+  4. If argCount > 0, then
+    [...]
+    d. Let j be +0𝔽.
+    e. For each element E of items, do
+        i. Perform ? Set(O, ! ToString(j), E, true).
+        ii. Set j to j + 1𝔽.
+  5. Perform ? Set(O, "length", 𝔽(len + argCount), true).
+
+  OrdinarySetWithOwnDescriptor ( O, P, V, Receiver, ownDesc )
+
+  [...]
+  2. If IsDataDescriptor(ownDesc) is true, then
+    a. If ownDesc.[[Writable]] is false, return false.
+
+  Set ( O, P, V, Throw )
+
+  [...]
+  1. Let success be ? O.[[Set]](P, V, O).
+  2. If success is false and Throw is true, throw a TypeError exception.
+---*/
+
+var array = [];
+var arrayPrototypeSet0Calls = 0;
+
+Object.defineProperty(Array.prototype, "0", {
+  set(_val) {
+    Object.defineProperty(array, "length", { writable: false });
+    arrayPrototypeSet0Calls++;
+  },
+});
+
+assert.throws(TypeError, function() {
+  array.unshift(1);
+});
+
+assert(!array.hasOwnProperty(0));
+assert.sameValue(array.length, 0);
+assert.sameValue(arrayPrototypeSet0Calls, 1);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/unshift/set-length-zero-array-is-frozen.js b/js/src/tests/test262/built-ins/Array/prototype/unshift/set-length-zero-array-is-frozen.js
new file mode 100644
index 0000000000..0896cb8a25
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/unshift/set-length-zero-array-is-frozen.js
@@ -0,0 +1,38 @@
+// Copyright (C) 2022 Apple Inc. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.unshift
+description: >
+  A TypeError is thrown when "length" is [[Set]] on an empty frozen array.
+info: |
+  Array.prototype.unshift ( ...items )
+
+  [...]
+  2. Let len be ? LengthOfArrayLike(O).
+  [...]
+  5. Perform ? Set(O, "length", 𝔽(len + argCount), true).
+
+  OrdinarySetWithOwnDescriptor ( O, P, V, Receiver, ownDesc )
+
+  [...]
+  2. If IsDataDescriptor(ownDesc) is true, then
+    a. If ownDesc.[[Writable]] is false, return false.
+
+  Set ( O, P, V, Throw )
+
+  [...]
+  1. Let success be ? O.[[Set]](P, V, O).
+  2. If success is false and Throw is true, throw a TypeError exception.
+---*/
+
+var array = [];
+Object.freeze(array);
+
+assert.throws(TypeError, function() {
+  array.unshift();
+});
+
+assert(!array.hasOwnProperty(0));
+assert.sameValue(array.length, 0);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/unshift/set-length-zero-array-length-is-non-writable.js b/js/src/tests/test262/built-ins/Array/prototype/unshift/set-length-zero-array-length-is-non-writable.js
new file mode 100644
index 0000000000..c6fa486c03
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/unshift/set-length-zero-array-length-is-non-writable.js
@@ -0,0 +1,38 @@
+// Copyright (C) 2022 Apple Inc. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.unshift
+description: >
+  A TypeError is thrown when "length" is [[Set]] on an empty array with non-writable "length".
+info: |
+  Array.prototype.unshift ( ...items )
+
+  [...]
+  2. Let len be ? LengthOfArrayLike(O).
+  [...]
+  5. Perform ? Set(O, "length", 𝔽(len + argCount), true).
+
+  OrdinarySetWithOwnDescriptor ( O, P, V, Receiver, ownDesc )
+
+  [...]
+  2. If IsDataDescriptor(ownDesc) is true, then
+    a. If ownDesc.[[Writable]] is false, return false.
+
+  Set ( O, P, V, Throw )
+
+  [...]
+  1. Let success be ? O.[[Set]](P, V, O).
+  2. If success is false and Throw is true, throw a TypeError exception.
+---*/
+
+var array = [];
+Object.defineProperty(array, "length", { writable: false });
+
+assert.throws(TypeError, function() {
+  array.unshift();
+});
+
+assert(!array.hasOwnProperty(0));
+assert.sameValue(array.length, 0);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/unshift/shell.js b/js/src/tests/test262/built-ins/Array/prototype/unshift/shell.js
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/js/src/tests/test262/built-ins/Array/prototype/unshift/throws-if-integer-limit-exceeded.js b/js/src/tests/test262/built-ins/Array/prototype/unshift/throws-if-integer-limit-exceeded.js
new file mode 100644
index 0000000000..0e9ceada82
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/unshift/throws-if-integer-limit-exceeded.js
@@ -0,0 +1,40 @@
+// Copyright (C) 2017 André Bargull. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.unshift
+description: >
+  A TypeError is thrown if the new length exceeds 2^53-1.
+info: |
+  1. ...
+  2. Let len be ? ToLength(? Get(O, "length")).
+  3. Let argCount be the number of actual arguments.
+  4. If argCount > 0, then
+    a. If len+argCount > 2^53-1, throw a TypeError exception.
+    b. ...
+features: [exponentiation]
+---*/
+
+var arrayLike = {};
+
+arrayLike.length = 2 ** 53 - 1;
+assert.throws(TypeError, function() {
+  Array.prototype.unshift.call(arrayLike, null);
+}, "Length is 2**53 - 1");
+
+arrayLike.length = 2 ** 53;
+assert.throws(TypeError, function() {
+  Array.prototype.unshift.call(arrayLike, null);
+}, "Length is 2**53");
+
+arrayLike.length = 2 ** 53 + 2;
+assert.throws(TypeError, function() {
+  Array.prototype.unshift.call(arrayLike, null);
+}, "Length is 2**53 + 2");
+
+arrayLike.length = Infinity;
+assert.throws(TypeError, function() {
+  Array.prototype.unshift.call(arrayLike, null);
+}, "Length is Infinity");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/unshift/throws-with-string-receiver.js b/js/src/tests/test262/built-ins/Array/prototype/unshift/throws-with-string-receiver.js
new file mode 100644
index 0000000000..7db1e088fd
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/unshift/throws-with-string-receiver.js
@@ -0,0 +1,47 @@
+// Copyright (C) 2020 Sony Interactive Entertainment Inc. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.unshift
+description: >
+  Array#unshift throws TypeError upon attempting to modify a string
+info: |
+  Array.prototype.unshift ( ...items )
+  ...
+  4. If argCount > 0, then
+    ...
+    c. Repeat, while k > 0,
+      ...
+      iv. If fromPresent is true, then
+        ...
+        2. Perform ? Set(O, to, fromValue, true).
+      ...
+    ...
+    f. Repeat, while items is not empty
+      ...
+      Perform ? Set(O, ! ToString(j), E, true).
+      ...
+  5. Perform ? Set(O, "length", len + argCount, true).
+
+  Set ( O, P, V, Throw )
+  ...
+  4. Let success be ? O.[[Set]](P, V, O).
+  5. If success is false and Throw is true, throw a TypeError exception.
+---*/
+
+assert.throws(TypeError, () => {
+  Array.prototype.unshift.call('');
+}, "Array.prototype.unshift.call('')");
+
+assert.throws(TypeError, () => {
+  Array.prototype.unshift.call('', 1);
+}, "Array.prototype.unshift.call('', 1)");
+
+assert.throws(TypeError, () => {
+  Array.prototype.unshift.call('abc');
+}, "Array.prototype.unshift.call('abc')");
+
+assert.throws(TypeError, () => {
+  Array.prototype.unshift.call('abc', 1);
+}, "Array.prototype.unshift.call('abc', 1)");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/values/browser.js b/js/src/tests/test262/built-ins/Array/prototype/values/browser.js
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/js/src/tests/test262/built-ins/Array/prototype/values/iteration-mutable.js b/js/src/tests/test262/built-ins/Array/prototype/values/iteration-mutable.js
new file mode 100644
index 0000000000..02a7bce3b3
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/values/iteration-mutable.js
@@ -0,0 +1,41 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.values
+description: >
+  New items in the array are accessible via iteration until iterator is "done".
+info: |
+  When an item is added to the array after the iterator is created but
+  before the iterator is "done" (as defined by 22.1.5.2.1), the new item's
+  value should be accessible via iteration. When an item is added to the
+  array after the iterator is "done", the new item should not be
+  accessible via iteration.
+---*/
+
+var array = [];
+var iterator = array.values();
+var result;
+
+array.push('a');
+
+result = iterator.next();
+assert.sameValue(result.done, false, 'First result `done` flag');
+assert.sameValue(result.value, 'a', 'First result `value`');
+
+result = iterator.next();
+assert.sameValue(result.done, true, 'Exhausted result `done` flag');
+assert.sameValue(result.value, undefined, 'Exhausted result `value`');
+
+array.push('b');
+
+result = iterator.next();
+assert.sameValue(
+  result.done, true,
+  'Exhausted result `done` flag (after push)'
+);
+assert.sameValue(
+  result.value, undefined,
+  'Exhausted result `value` (after push)'
+);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/values/iteration.js b/js/src/tests/test262/built-ins/Array/prototype/values/iteration.js
new file mode 100644
index 0000000000..c5e6f232a1
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/values/iteration.js
@@ -0,0 +1,35 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.values
+description: >
+  The return is a valid iterator with the array's numeric properties.
+info: |
+  22.1.3.29 Array.prototype.values ( )
+
+  1. Let O be ToObject(this value).
+  2. ReturnIfAbrupt(O).
+  3. Return CreateArrayIterator(O, "value").
+---*/
+
+var array = ['a', 'b', 'c'];
+var iterator = array.values();
+var result;
+
+result = iterator.next();
+assert.sameValue(result.value, 'a', 'First result `value`');
+assert.sameValue(result.done, false, 'First result `done` flag');
+
+result = iterator.next();
+assert.sameValue(result.value, 'b', 'Second result `value`');
+assert.sameValue(result.done, false, 'Second result `done` flag');
+
+result = iterator.next();
+assert.sameValue(result.value, 'c', 'Third result `value`');
+assert.sameValue(result.done, false, 'Third result `done` flag');
+
+result = iterator.next();
+assert.sameValue(result.value, undefined, 'Exhausted result `value`');
+assert.sameValue(result.done, true, 'Exhausted result `done` flag');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/values/length.js b/js/src/tests/test262/built-ins/Array/prototype/values/length.js
new file mode 100644
index 0000000000..c87379d29f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/values/length.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.values
+description: Array.prototype.values `length` property
+info: |
+    ES6 Section 17:
+    Every built-in Function object, including constructors, has a length
+    property whose value is an integer. Unless otherwise specified, this value
+    is equal to the largest number of named arguments shown in the subclause
+    headings for the function description, including optional parameters.
+
+    [...]
+
+    Unless otherwise specified, the length property of a built-in Function
+    object has the attributes { [[Writable]]: false, [[Enumerable]]: false,
+    [[Configurable]]: true }.
+includes: [propertyHelper.js]
+---*/
+
+assert.sameValue(Array.prototype.values.length, 0);
+
+verifyNotEnumerable(Array.prototype.values, 'length');
+verifyNotWritable(Array.prototype.values, 'length');
+verifyConfigurable(Array.prototype.values, 'length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/values/name.js b/js/src/tests/test262/built-ins/Array/prototype/values/name.js
new file mode 100644
index 0000000000..71eb0fb243
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/values/name.js
@@ -0,0 +1,28 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.values
+description: Array.prototype.values `name` property
+info: |
+    ES6 Section 17:
+
+    Every built-in Function object, including constructors, that is not
+    identified as an anonymous function has a name property whose value is a
+    String. Unless otherwise specified, this value is the name that is given to
+    the function in this specification.
+
+    [...]
+
+    Unless otherwise specified, the name property of a built-in Function
+    object, if it exists, has the attributes { [[Writable]]: false,
+    [[Enumerable]]: false, [[Configurable]]: true }.
+includes: [propertyHelper.js]
+---*/
+
+assert.sameValue(Array.prototype.values.name, 'values');
+
+verifyNotEnumerable(Array.prototype.values, 'name');
+verifyNotWritable(Array.prototype.values, 'name');
+verifyConfigurable(Array.prototype.values, 'name');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/values/not-a-constructor.js b/js/src/tests/test262/built-ins/Array/prototype/values/not-a-constructor.js
new file mode 100644
index 0000000000..2afdde1e37
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/values/not-a-constructor.js
@@ -0,0 +1,35 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Array.prototype.values does not implement [[Construct]], is not new-able
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+
+  sec-evaluatenew
+
+  ...
+  7. If IsConstructor(constructor) is false, throw a TypeError exception.
+  ...
+includes: [isConstructor.js]
+features: [Reflect.construct, Array.prototype.values, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Array.prototype.values),
+  false,
+  'isConstructor(Array.prototype.values) must return false'
+);
+
+assert.throws(TypeError, () => {
+  new Array.prototype.values();
+}, '`new Array.prototype.values()` throws TypeError');
+
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/values/prop-desc.js b/js/src/tests/test262/built-ins/Array/prototype/values/prop-desc.js
new file mode 100644
index 0000000000..111d637b8e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/values/prop-desc.js
@@ -0,0 +1,19 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.values
+description: Array.prototype.values property descriptor
+info: |
+    Every other data property described in clauses 18 through 26 and in Annex
+    B.2 has the attributes { [[Writable]]: true, [[Enumerable]]: false,
+    [[Configurable]]: true } unless otherwise specified.
+includes: [propertyHelper.js]
+---*/
+
+assert.sameValue(typeof Array.prototype.values, 'function');
+
+verifyNotEnumerable(Array.prototype, 'values');
+verifyWritable(Array.prototype, 'values');
+verifyConfigurable(Array.prototype, 'values');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/values/returns-iterator-from-object.js b/js/src/tests/test262/built-ins/Array/prototype/values/returns-iterator-from-object.js
new file mode 100644
index 0000000000..8bf0aa1d06
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/values/returns-iterator-from-object.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.values
+description: >
+  Creates an iterator from a custom object.
+info: |
+  22.1.3.29 Array.prototype.values ( )
+
+  1. Let O be ToObject(this value).
+  2. ReturnIfAbrupt(O).
+  3. Return CreateArrayIterator(O, "value").
+features: [Symbol.iterator]
+---*/
+
+var obj = {
+  length: 2
+};
+var iter = Array.prototype.values.call(obj);
+var ArrayIteratorProto = Object.getPrototypeOf([][Symbol.iterator]());
+
+assert.sameValue(
+  Object.getPrototypeOf(iter), ArrayIteratorProto,
+  'The prototype of [].values() is %ArrayIteratorPrototype%'
+);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/values/returns-iterator.js b/js/src/tests/test262/built-ins/Array/prototype/values/returns-iterator.js
new file mode 100644
index 0000000000..f3cabffaea
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/values/returns-iterator.js
@@ -0,0 +1,32 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.values
+description: >
+  The method should return an Iterator instance.
+info: |
+  22.1.3.29 Array.prototype.values ( )
+
+  1. Let O be ToObject(this value).
+  2. ReturnIfAbrupt(O).
+  3. Return CreateArrayIterator(O, "value").
+
+  22.1.5.1 CreateArrayIterator Abstract Operation
+
+  ...
+  2. Let iterator be ObjectCreate(%ArrayIteratorPrototype%, «‍[[IteratedObject]],
+  [[ArrayIteratorNextIndex]], [[ArrayIterationKind]]»).
+  ...
+  6. Return iterator.
+features: [Symbol.iterator]
+---*/
+
+var ArrayIteratorProto = Object.getPrototypeOf([][Symbol.iterator]());
+var iter = [].values();
+
+assert.sameValue(
+  Object.getPrototypeOf(iter), ArrayIteratorProto,
+  'The prototype of [].values() is %ArrayIteratorPrototype%'
+);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/values/shell.js b/js/src/tests/test262/built-ins/Array/prototype/values/shell.js
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/js/src/tests/test262/built-ins/Array/prototype/values/this-val-non-obj-coercible.js b/js/src/tests/test262/built-ins/Array/prototype/values/this-val-non-obj-coercible.js
new file mode 100644
index 0000000000..843a6274ba
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/values/this-val-non-obj-coercible.js
@@ -0,0 +1,20 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.values
+description: >
+    `this` value not object coercible
+info: |
+    1. Let O be ToObject(this value).
+    2. ReturnIfAbrupt(O).
+---*/
+
+assert.throws(TypeError, function() {
+  Array.prototype.values.call(undefined);
+});
+
+assert.throws(TypeError, function() {
+  Array.prototype.values.call(null);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/with/browser.js b/js/src/tests/test262/built-ins/Array/prototype/with/browser.js
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/js/src/tests/test262/built-ins/Array/prototype/with/frozen-this-value.js b/js/src/tests/test262/built-ins/Array/prototype/with/frozen-this-value.js
new file mode 100644
index 0000000000..73cdc284c2
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/with/frozen-this-value.js
@@ -0,0 +1,20 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.with
+description: >
+  Array.prototype.with works on frozen objects
+features: [change-array-by-copy]
+includes: [compareArray.js]
+---*/
+
+var arr = Object.freeze([0, 1, 2]);
+var result = arr.with(1, 3);
+assert.compareArray(result, [0, 3, 2]);
+
+var arrayLike = Object.freeze({ length: 3, 0: 0, 1: 1, 2: 2 });
+var result2 = Array.prototype.with.call(arrayLike, 1, 3);
+assert.compareArray(result2, [0, 3, 2]);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/with/holes-not-preserved.js b/js/src/tests/test262/built-ins/Array/prototype/with/holes-not-preserved.js
new file mode 100644
index 0000000000..faefdc173d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/with/holes-not-preserved.js
@@ -0,0 +1,32 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.with
+description: >
+  Array.prototype.with does not preserve holes in the array
+info: |
+  Array.prototype.with ( )
+
+  ...
+  2. Let len be ? LengthOfArrayLike(O).
+  ...
+  5. Repeat, while k < len
+    a. Let Pk be ! ToString(𝔽(k)).
+    b. If k is actualIndex, let fromValue be value.
+    c. Else, let fromValue be ? Get(O, Pk).
+    d. Perform ? CreateDataPropertyOrThrow(A, Pk, fromValue).
+    e. Set k to k + 1.
+features: [change-array-by-copy]
+includes: [compareArray.js]
+---*/
+
+var arr = [0, /* hole */, 2, /* hole */, 4];
+Array.prototype[3] = 3;
+
+var result = arr.with(2, 6);
+assert.compareArray(result, [0, undefined, 6, 3, 4]);
+assert(result.hasOwnProperty(1));
+assert(result.hasOwnProperty(3));
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/with/ignores-species.js b/js/src/tests/test262/built-ins/Array/prototype/with/ignores-species.js
new file mode 100644
index 0000000000..7b198186fc
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/with/ignores-species.js
@@ -0,0 +1,32 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.with
+description: >
+  Array.prototype.with ignores @@species
+info: |
+  Array.prototype.with ( )
+
+  ...
+  8. Let A be ? ArrayCreate(𝔽(len)).
+  ...
+features: [change-array-by-copy]
+---*/
+
+var a = [1, 2, 3];
+a.constructor = {};
+a.constructor[Symbol.species] = function () {}
+
+assert.sameValue(Object.getPrototypeOf(a.with(0, 0)), Array.prototype);
+
+var b = [1, 2, 3];
+Object.defineProperty(b, "constructor", {
+  get() {
+    throw new Test262Error("Should not get .constructor");
+  }
+});
+
+b.with(0, 0);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/with/immutable.js b/js/src/tests/test262/built-ins/Array/prototype/with/immutable.js
new file mode 100644
index 0000000000..04c1621dff
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/with/immutable.js
@@ -0,0 +1,19 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.with
+description: >
+  Array.prototype.with does not mutate its this value
+features: [change-array-by-copy]
+includes: [compareArray.js]
+---*/
+
+var arr = [0, 1, 2];
+arr.with(1, 3);
+
+assert.compareArray(arr, [0, 1, 2]);
+assert.notSameValue(arr.with(1, 3), arr);
+assert.notSameValue(arr.with(1, 1), arr);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/with/index-bigger-or-eq-than-length.js b/js/src/tests/test262/built-ins/Array/prototype/with/index-bigger-or-eq-than-length.js
new file mode 100644
index 0000000000..752b280db7
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/with/index-bigger-or-eq-than-length.js
@@ -0,0 +1,37 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.with
+description: >
+  Array.prototype.with throws if the index is bigger than or equal to the array length.
+info: |
+  Array.prototype.with ( index, value )
+
+  ...
+  2. Let len be ? LengthOfArrayLike(O).
+  3. Let relativeIndex be ? ToIntegerOrInfinity(index).
+  4. If index >= 0, let actualIndex be relativeIndex.
+  5. Else, let actualIndex be len + relativeIndex.
+  6. If actualIndex >= len or actualIndex < 0, throw a *RangeError* exception.
+  ...
+features: [change-array-by-copy, exponentiation]
+---*/
+
+assert.throws(RangeError, function() {
+  [0, 1, 2].with(3, 7);
+});
+
+assert.throws(RangeError, function() {
+  [0, 1, 2].with(10, 7);
+});
+
+assert.throws(RangeError, function() {
+  [0, 1, 2].with(2 ** 53 + 2, 7);
+});
+
+assert.throws(RangeError, function() {
+  [0, 1, 2].with(Infinity, 7);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/with/index-casted-to-number.js b/js/src/tests/test262/built-ins/Array/prototype/with/index-casted-to-number.js
new file mode 100644
index 0000000000..e0543723e0
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/with/index-casted-to-number.js
@@ -0,0 +1,29 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.with
+description: >
+  Array.prototype.with casts the index to an integer.
+info: |
+  Array.prototype.with ( index, value )
+
+  ...
+  2. Let len be ? LengthOfArrayLike(O).
+  3. Let relativeIndex be ? ToIntegerOrInfinity(index).
+  4. If index >= 0, let actualIndex be relativeIndex.
+  5. Else, let actualIndex be len + relativeIndex.
+  ...
+features: [change-array-by-copy]
+includes: [compareArray.js]
+---*/
+
+var arr = [0, 4, 16];
+
+assert.compareArray(arr.with(1.2, 7), [0, 7, 16]);
+assert.compareArray(arr.with("1", 3), [0, 3, 16]);
+assert.compareArray(arr.with("-1", 5), [0, 4, 5]);
+assert.compareArray(arr.with(NaN, 2), [2, 4, 16]);
+assert.compareArray(arr.with("dog", "cat"), ["cat", 4, 16]);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/with/index-negative.js b/js/src/tests/test262/built-ins/Array/prototype/with/index-negative.js
new file mode 100644
index 0000000000..d9b8a8eaac
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/with/index-negative.js
@@ -0,0 +1,29 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.with
+description: >
+  Array.prototype.with adds length to index if it's negative.
+info: |
+  Array.prototype.with ( index, value )
+
+  ...
+  2. Let len be ? LengthOfArrayLike(O).
+  3. Let relativeIndex be ? ToIntegerOrInfinity(index).
+  4. If index >= 0, let actualIndex be relativeIndex.
+  5. Else, let actualIndex be len + relativeIndex.
+  ...
+features: [change-array-by-copy]
+includes: [compareArray.js]
+---*/
+
+var arr = [0, 1, 2];
+
+assert.compareArray(arr.with(-1, 4), [0, 1, 4]);
+assert.compareArray(arr.with(-3, 4), [4, 1, 2]);
+
+// -0 is not < 0
+assert.compareArray(arr.with(-0, 4), [4, 1, 2]);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/with/index-smaller-than-minus-length.js b/js/src/tests/test262/built-ins/Array/prototype/with/index-smaller-than-minus-length.js
new file mode 100644
index 0000000000..d1f98336ab
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/with/index-smaller-than-minus-length.js
@@ -0,0 +1,39 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.with
+description: >
+  Array.prototype.with throws if the (negative) index is smaller than -length.
+info: |
+  Array.prototype.with ( index, value )
+
+  ...
+  2. Let len be ? LengthOfArrayLike(O).
+  3. Let relativeIndex be ? ToIntegerOrInfinity(index).
+  4. If index >= 0, let actualIndex be relativeIndex.
+  5. Else, let actualIndex be len + relativeIndex.
+  6. If actualIndex >= len or actualIndex < 0, throw a *RangeError* exception.
+  ...
+features: [change-array-by-copy, exponentiation]
+---*/
+
+[0, 1, 2].with(-3, 7);
+
+assert.throws(RangeError, function() {
+  [0, 1, 2].with(-4, 7);
+});
+
+assert.throws(RangeError, function() {
+  [0, 1, 2].with(-10, 7);
+});
+
+assert.throws(RangeError, function() {
+  [0, 1, 2].with(-(2 ** 53) - 2, 7);
+});
+
+assert.throws(RangeError, function() {
+  [0, 1, 2].with(-Infinity, 7);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/with/length-decreased-while-iterating.js b/js/src/tests/test262/built-ins/Array/prototype/with/length-decreased-while-iterating.js
new file mode 100644
index 0000000000..8102da0e52
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/with/length-decreased-while-iterating.js
@@ -0,0 +1,42 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.with
+description: >
+  Array.prototype.with caches the length getting the array elements.
+info: |
+  Array.prototype.with ( index, value )
+
+  ...
+  2. Let len be ? LengthOfArrayLike(O).
+  ...
+  5. Repeat, while k < len
+    a. Let Pk be ! ToString(𝔽(k)).
+    b. If k is actualIndex, let fromValue be value.
+    c. Else, let fromValue be ? Get(O, Pk).
+    d. Perform ? CreateDataPropertyOrThrow(A, Pk, fromValue).
+    e. Set k to k + 1.
+features: [change-array-by-copy]
+includes: [compareArray.js]
+---*/
+
+Array.prototype[4] = 5;
+
+var arr = Object.defineProperty([0, 1, 2, 3, 4], "1", {
+  get() {
+    arr.length = 1;
+    return 1;
+  }
+});
+assert.compareArray(arr.with(2, 7), [0, 1, 7, undefined, 5]);
+
+arr = Object.defineProperty([0, 1, 2, 3, 4], "1", {
+  get() {
+    arr.length = 1;
+    return 1;
+  }
+});
+assert.compareArray(arr.with(0, 7), [7, 1, undefined, undefined, 5]);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/with/length-exceeding-array-length-limit.js b/js/src/tests/test262/built-ins/Array/prototype/with/length-exceeding-array-length-limit.js
new file mode 100644
index 0000000000..76dd9cf5ec
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/with/length-exceeding-array-length-limit.js
@@ -0,0 +1,41 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.with
+description: >
+  Array.prototype.with limits the length to 2 ** 32 - 1
+info: |
+  Array.prototype.with ( index, value )
+
+  ...
+  2. Let len be ? LengthOfArrayLike(O).
+  ...
+  7. Let A be ? ArrayCreate(𝔽(len)).
+  ...
+
+  ArrayCreate ( length [, proto ] )
+
+  1. If length > 2 ** 32 - 1, throw a RangeError exception.
+features: [change-array-by-copy, exponentiation]
+---*/
+
+// Object with large "length" property
+var arrayLike = {
+  get "0"() {
+    throw new Test262Error("Get 0");
+  },
+  get "4294967295" () { // 2 ** 32 - 1
+    throw new Test262Error("Get 4294967295");
+  },
+  get "4294967296" () { // 2 ** 32
+    throw new Test262Error("Get 4294967296");
+  },
+  length: 2 ** 32
+};
+
+assert.throws(RangeError, function() {
+  Array.prototype.with.call(arrayLike, 0, 0);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/with/length-increased-while-iterating.js b/js/src/tests/test262/built-ins/Array/prototype/with/length-increased-while-iterating.js
new file mode 100644
index 0000000000..01e3147e51
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/with/length-increased-while-iterating.js
@@ -0,0 +1,34 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.with
+description: >
+  Array.prototype.with caches the length getting the array elements.
+info: |
+  Array.prototype.with ( index, value )
+
+  ...
+  2. Let len be ? LengthOfArrayLike(O).
+  ...
+  5. Repeat, while k < len
+    a. Let Pk be ! ToString(𝔽(k)).
+    b. If k is actualIndex, let fromValue be value.
+    c. Else, let fromValue be ? Get(O, Pk).
+    d. Perform ? CreateDataPropertyOrThrow(A, Pk, fromValue).
+    e. Set k to k + 1.
+features: [change-array-by-copy]
+includes: [compareArray.js]
+---*/
+
+var arr = [0, 1, 2];
+Object.defineProperty(arr, "0", {
+  get() {
+    arr.push(4);
+    return 0;
+  }
+});
+
+assert.compareArray(arr.with(1, 4), [0, 4, 2]);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/with/length-tolength.js b/js/src/tests/test262/built-ins/Array/prototype/with/length-tolength.js
new file mode 100644
index 0000000000..2573c8532f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/with/length-tolength.js
@@ -0,0 +1,32 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.with
+description: >
+  Array.prototype.with converts the this value length to a number.
+info: |
+  Array.prototype.with ( index, value )
+
+  ...
+  2. Let len be ? LengthOfArrayLike(O).
+  ...
+features: [change-array-by-copy]
+includes: [compareArray.js]
+---*/
+
+var arrayLike = { length: "2", 0: 1, 1: 2, 2: 3 };
+assert.compareArray(Array.prototype.with.call(arrayLike, 0, 4), [4, 2]);
+
+var arrayLike = {
+  length: {
+    valueOf: () => 2
+  },
+  0: 1,
+  1: 2,
+  2: 3,
+};
+
+assert.compareArray(Array.prototype.with.call(arrayLike, 0, 4), [4, 2]);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/with/metadata/browser.js b/js/src/tests/test262/built-ins/Array/prototype/with/metadata/browser.js
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/js/src/tests/test262/built-ins/Array/prototype/with/metadata/length.js b/js/src/tests/test262/built-ins/Array/prototype/with/metadata/length.js
new file mode 100644
index 0000000000..7fac787816
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/with/metadata/length.js
@@ -0,0 +1,32 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.with
+description: >
+  The "length" property of Array.prototype.with
+info: |
+  17 ECMAScript Standard Built-in Objects
+
+  Every built-in function object, including constructors, has a length property
+  whose value is an integer. Unless otherwise specified, this value is equal to
+  the largest number of named arguments shown in the subclause headings for the
+  function description. Optional parameters (which are indicated with brackets:
+  [ ]) or rest parameters (which are shown using the form «...name») are not
+  included in the default argument count.
+
+  Unless otherwise specified, the length property of a built-in function object
+  has the attributes { [[Writable]]: false, [[Enumerable]]: false,
+    [[Configurable]]: true }.
+includes: [propertyHelper.js]
+features: [change-array-by-copy]
+---*/
+
+verifyProperty(Array.prototype.with, "length", {
+  value: 2,
+  writable: false,
+  enumerable: false,
+  configurable: true,
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/with/metadata/name.js b/js/src/tests/test262/built-ins/Array/prototype/with/metadata/name.js
new file mode 100644
index 0000000000..108a0b9a7e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/with/metadata/name.js
@@ -0,0 +1,30 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.with
+description: >
+  Array.prototype.with.name is "with".
+info: |
+  Array.prototype.with ( index, value )
+
+  17 ECMAScript Standard Built-in Objects:
+    Every built-in Function object, including constructors, that is not
+    identified as an anonymous function has a name property whose value
+    is a String.
+
+    Unless otherwise specified, the name property of a built-in Function
+    object, if it exists, has the attributes { [[Writable]]: false,
+    [[Enumerable]]: false, [[Configurable]]: true }.
+includes: [propertyHelper.js]
+features: [change-array-by-copy]
+---*/
+
+verifyProperty(Array.prototype.with, "name", {
+  value: "with",
+  writable: false,
+  enumerable: false,
+  configurable: true,
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/with/metadata/property-descriptor.js b/js/src/tests/test262/built-ins/Array/prototype/with/metadata/property-descriptor.js
new file mode 100644
index 0000000000..2c43f28ec6
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/with/metadata/property-descriptor.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.with
+description: >
+  "with" property of Array.prototype
+info: |
+  17 ECMAScript Standard Built-in Objects
+
+  Every other data property described in clauses 18 through 26 and in Annex B.2
+  has the attributes { [[Writable]]: true, [[Enumerable]]: false,
+    [[Configurable]]: true } unless otherwise specified.
+includes: [propertyHelper.js]
+features: [change-array-by-copy]
+---*/
+
+assert.sameValue(typeof Array.prototype.with, "function", "typeof");
+
+verifyProperty(Array.prototype, "with", {
+  value: Array.prototype.with,
+  writable: true,
+  enumerable: false,
+  configurable: true,
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/with/metadata/shell.js b/js/src/tests/test262/built-ins/Array/prototype/with/metadata/shell.js
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/js/src/tests/test262/built-ins/Array/prototype/with/no-get-replaced-index.js b/js/src/tests/test262/built-ins/Array/prototype/with/no-get-replaced-index.js
new file mode 100644
index 0000000000..91c77a539e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/with/no-get-replaced-index.js
@@ -0,0 +1,32 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.with
+description: >
+  Array.prototype.with does not [[Get]] the value in the replaced position
+info: |
+  Array.prototype.with ( )
+
+  ...
+  5. Repeat, while k < len
+    a. Let Pk be ! ToString(𝔽(k)).
+    b. If k is actualIndex, let fromValue be value.
+    c. Else, let fromValue be ? Get(O, Pk).
+    d. Perform ? CreateDataPropertyOrThrow(A, Pk, fromValue).
+    e. Set k to k + 1.
+features: [change-array-by-copy]
+includes: [compareArray.js]
+---*/
+
+var arr = [0, 1, 2, 3];
+Object.defineProperty(arr, "2", {
+  get() {
+    throw new Test262Error("Should not get '2'");
+  }
+});
+
+var result = arr.with(2, 6);
+assert.compareArray(result, [0, 1, 6, 3]);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/with/not-a-constructor.js b/js/src/tests/test262/built-ins/Array/prototype/with/not-a-constructor.js
new file mode 100644
index 0000000000..257a21aa51
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/with/not-a-constructor.js
@@ -0,0 +1,35 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Array.prototype.with does not implement [[Construct]], is not new-able
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+
+  sec-evaluatenew
+
+  ...
+  7. If IsConstructor(constructor) is false, throw a TypeError exception.
+  ...
+includes: [isConstructor.js]
+features: [change-array-by-copy, Reflect.construct]
+---*/
+
+assert.sameValue(
+  isConstructor(Array.prototype.with),
+  false,
+  'isConstructor(Array.prototype.with) must return false'
+);
+
+assert.throws(TypeError, () => {
+  new Array.prototype.with();
+}, '`new Array.prototype.with()` throws TypeError');
+
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/with/shell.js b/js/src/tests/test262/built-ins/Array/prototype/with/shell.js
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/js/src/tests/test262/built-ins/Array/prototype/with/this-value-boolean.js b/js/src/tests/test262/built-ins/Array/prototype/with/this-value-boolean.js
new file mode 100644
index 0000000000..453817c2a5
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/with/this-value-boolean.js
@@ -0,0 +1,41 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.with
+description: >
+  Array.prototype.with casts primitive receivers to objects
+info: |
+  Array.prototype.with ( index, value )
+
+  1. Let O be ? ToObject(this value).
+  2. Let len be ? LengthOfArrayLike(O).
+  ...
+features: [change-array-by-copy]
+includes: [compareArray.js]
+---*/
+
+Boolean.prototype.length = 2;
+Boolean.prototype[0] = 0;
+Boolean.prototype[1] = 1;
+
+assert.compareArray(Array.prototype.with.call(true, 0, 2), [2, 1]);
+assert.compareArray(Array.prototype.with.call(false, 0, 2), [2, 1]);
+
+/* Add length and indexed properties to `Boolean.prototype` */
+Boolean.prototype.length = 3;
+delete Boolean.prototype[0];
+delete Boolean.prototype[1];
+assert.compareArray(Array.prototype.with.call(true, 0, 2), [2, undefined, undefined]);
+assert.compareArray(Array.prototype.with.call(false, 0, 2), [2, undefined, undefined]);
+delete Boolean.prototype.length;
+Boolean.prototype[0] = "monkeys";
+Boolean.prototype[2] = "bogus";
+assert.throws(RangeError,
+              () => compareArray(Array.prototype.with.call(true, 0, 2)),
+              "Array.prototype.with on object with undefined length");
+assert.throws(RangeError,
+              () => compareArray(Array.prototype.with.call(false, 0, 2)),
+              "Array.prototype.with on object with undefined length");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/prototype/with/this-value-nullish.js b/js/src/tests/test262/built-ins/Array/prototype/with/this-value-nullish.js
new file mode 100644
index 0000000000..befef0642d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/with/this-value-nullish.js
@@ -0,0 +1,24 @@
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.with
+description: >
+  Array.prototype.with throws if the receiver is null or undefined
+info: |
+  Array.prototype.with ( index, value )
+
+  1. Let O be ? ToObject(this value).
+  ...
+features: [change-array-by-copy]
+---*/
+
+assert.throws(TypeError, () => {
+  Array.prototype.with.call(null, 0, 0);
+}, '`Array.prototype.with.call(null, 0, 0)` throws TypeError');
+
+assert.throws(TypeError, () => {
+  Array.prototype.with.call(undefined, 0, 0);
+}, '`Array.prototype.with.call(undefined, 0, 0)` throws TypeError');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Array/shell.js b/js/src/tests/test262/built-ins/Array/shell.js
new file mode 100644
index 0000000000..eda1477282
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/shell.js
@@ -0,0 +1,24 @@
+// GENERATED, DO NOT EDIT
+// file: isConstructor.js
+// Copyright (C) 2017 André Bargull. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+description: |
+    Test if a given function is a constructor function.
+defines: [isConstructor]
+features: [Reflect.construct]
+---*/
+
+function isConstructor(f) {
+    if (typeof f !== "function") {
+      throw new Test262Error("isConstructor invoked with a non-function value");
+    }
+
+    try {
+        Reflect.construct(function(){}, [], f);
+    } catch (e) {
+        return false;
+    }
+    return true;
+}
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