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Diffstat (limited to 'js/src/tests/test262/built-ins/Object/keys/order-after-define-property.js')
-rw-r--r-- | js/src/tests/test262/built-ins/Object/keys/order-after-define-property.js | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/Object/keys/order-after-define-property.js b/js/src/tests/test262/built-ins/Object/keys/order-after-define-property.js new file mode 100644 index 0000000000..151dd83a56 --- /dev/null +++ b/js/src/tests/test262/built-ins/Object/keys/order-after-define-property.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-object.keys +description: > + Property names are returned in ascending chronological order of creation + that is unaffected by [[DefineOwnProperty]]. +info: | + Object.keys ( O ) + + [...] + 2. Let nameList be ? EnumerableOwnPropertyNames(obj, key). + 3. Return CreateArrayFromList(nameList). + + EnumerableOwnPropertyNames ( O, kind ) + + [...] + 2. Let ownKeys be ? O.[[OwnPropertyKeys]](). + [...] + + OrdinaryOwnPropertyKeys ( O ) + + [...] + 3. For each own property key P of O that is a String but is not an array index, + in ascending chronological order of property creation, do + a. Add P as the last element of keys. + [...] + 5. Return keys. +includes: [compareArray.js] +---*/ + +var obj = {}; +Object.defineProperty(obj, "a", { + get: function() {}, + set: function(_value) {}, + enumerable: true, + configurable: true, +}); +obj.b = 2; +Object.defineProperty(obj, "a", {value: 1}); +assert.compareArray(Object.keys(obj), ["a", "b"]); + +reportCompare(0, 0); |