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Diffstat (limited to '')
-rw-r--r-- | js/src/tests/test262/built-ins/TypedArray/prototype/map/speciesctor-get-species-custom-ctor-returns-another-instance.js | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/TypedArray/prototype/map/speciesctor-get-species-custom-ctor-returns-another-instance.js b/js/src/tests/test262/built-ins/TypedArray/prototype/map/speciesctor-get-species-custom-ctor-returns-another-instance.js new file mode 100644 index 0000000000..5891ee6291 --- /dev/null +++ b/js/src/tests/test262/built-ins/TypedArray/prototype/map/speciesctor-get-species-custom-ctor-returns-another-instance.js @@ -0,0 +1,56 @@ +// Copyright (C) 2018 Peter Wong. All rights reserved. +// This code is governed by the BSD license found in the LICENSE file. +/*--- +esid: sec-%typedarray%.prototype.map +description: > + Custom @@species constructor may return a different TypedArray +info: | + 22.2.3.19 %TypedArray%.prototype.map ( callbackfn [ , thisArg ] ) + + ... + 6. Let A be ? TypedArraySpeciesCreate(O, « len »). + ... + + 22.2.4.7 TypedArraySpeciesCreate ( exemplar, argumentList ) + + ... + 3. Let constructor be ? SpeciesConstructor(exemplar, defaultConstructor). + 4. Return ? TypedArrayCreate(constructor, argumentList). + + 7.3.20 SpeciesConstructor ( O, defaultConstructor ) + + ... + 5. Let S be ? Get(C, @@species). + ... + 7. If IsConstructor(S) is true, return S. + ... + + 22.2.4.6 TypedArrayCreate ( constructor, argumentList ) + + 1. Let newTypedArray be ? Construct(constructor, argumentList). + 2. Perform ? ValidateTypedArray(newTypedArray). + 3. If argumentList is a List of a single Number, then + ... + 4. Return newTypedArray. +includes: [testTypedArray.js, compareArray.js] +features: [Symbol.species, TypedArray] +---*/ + +testWithTypedArrayConstructors(function(TA) { + var sample = new TA([40]); + var otherTA = TA === Int8Array ? Int16Array : Int8Array; + var other = new otherTA([1, 0, 1]); + var result; + + sample.constructor = {}; + sample.constructor[Symbol.species] = function() { + return other; + }; + + result = sample.map(function(a) { return a + 7; }); + + assert.sameValue(result, other, "returned another typedarray"); + assert(compareArray(result, [47, 0, 1]), "values are set on returned typedarray"); +}); + +reportCompare(0, 0); |