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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: get inherited constructor on SpeciesConstructor
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).
...
7.3.20 SpeciesConstructor ( O, defaultConstructor )
1. Assert: Type(O) is Object.
2. Let C be ? Get(O, "constructor").
3. If C is undefined, return defaultConstructor.
...
includes: [testTypedArray.js]
features: [TypedArray]
---*/
testWithTypedArrayConstructors(function(TA) {
var sample = new TA([40, 41, 42, 43]);
var calls = 0;
var result;
Object.defineProperty(TA.prototype, "constructor", {
get: function() {
calls++;
}
});
result = sample.map(function() {
return 0;
});
assert.sameValue(calls, 1, "called custom ctor get accessor once");
assert.sameValue(
Object.getPrototypeOf(result),
Object.getPrototypeOf(sample),
"use defaultCtor on an undefined return - getPrototypeOf check"
);
assert.sameValue(
result.constructor,
undefined,
"used defaultCtor but still checks the inherited .constructor"
);
calls = 6;
result.constructor;
assert.sameValue(
calls,
7,
"result.constructor triggers the inherited accessor property"
);
});
reportCompare(0, 0);
|
