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// 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);
|
