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// 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-%typedarray%.prototype.filter
description: >
Use custom @@species constructor if available
info: |
22.2.3.9 %TypedArray%.prototype.filter ( callbackfn [ , thisArg ] )
...
10. Let A be ? TypedArraySpeciesCreate(O, « captured »).
...
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, 41, 42]);
var calls = 0;
var other, result;
sample.constructor = {};
sample.constructor[Symbol.species] = function(captured) {
calls++;
other = new TA(captured);
return other;
};
result = sample.filter(function() { return true; });
assert.sameValue(calls, 1, "ctor called once");
assert.sameValue(result, other, "return is instance of custom constructor");
assert(compareArray(result, [40, 41, 42]), "values are set on the new obj");
});
reportCompare(0, 0);
|
