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This contains a few more tests for Array.fromAsync, in addition to what has already been merged and what is under review at #3791. This covers the following items from the testing plan at #3725: - Success cases - Creates promise - Create new array/arraylike in promise (with length = length property) - Input - Invalid input values - nonconforming object (arraylike without length, missing keys) - Covered by polyfill tests - Result promise rejects if length access fails (non-iterable input) - Unaffected by globalThis.Symbol mutation (non-iterable) - this-value - this-value is a constructor - this-value is not a constructor - If this is a constructor, and items doesn't have a Symbol.iterator, returns a new instance of this - Iterator closed when property creation on this fails - Returned promise rejects when ^ - Other tests - Error is thrown for all CreateDataProperty fails - Non-writable properties are overwritten by CreateDataProperty - Input with missing values Co-authored-by: Ms2ger <Ms2ger@igalia.com>
51 lines
1.7 KiB
JavaScript
51 lines
1.7 KiB
JavaScript
// Copyright (C) 2023 Igalia, S.L. All rights reserved.
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// This code is governed by the BSD license found in the LICENSE file.
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/*---
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esid: sec-array.fromasync
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description: >
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Overwrites non-writable element properties on an instance of a custom
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this-value
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info: |
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3.j.ii.8. Let _defineStatus_ be CreateDataPropertyOrThrow(_A_, _Pk_, _mappedValue_).
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...
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3.k.vii.6. Perform ? CreateDataPropertyOrThrow(_A_, _Pk_, _mappedValue_).
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includes: [asyncHelpers.js]
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flags: [async]
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features: [Array.fromAsync]
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---*/
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asyncTest(async function () {
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function MyArray() {
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this.length = 4;
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for (let ix = 0; ix < this.length; ix++) {
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Object.defineProperty(this, ix, {
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enumerable: true,
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writable: false,
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configurable: true,
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value: 99
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});
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}
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}
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let result = await Array.fromAsync.call(MyArray, [0, 1, 2]);
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assert.sameValue(result.length, 3, "Length property is overwritten");
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assert.sameValue(result[0], 0, "Read-only element 0 is overwritten");
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assert.sameValue(result[1], 1, "Read-only element 1 is overwritten");
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assert.sameValue(result[2], 2, "Read-only element 2 is overwritten");
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assert.sameValue(result[3], 99, "Element 3 is not overwritten");
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result = await Array.fromAsync.call(MyArray, {
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length: 3,
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0: 0,
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1: 1,
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2: 2,
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3: 3 // ignored
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});
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assert.sameValue(result.length, 3, "Length property is overwritten");
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assert.sameValue(result[0], 0, "Read-only element 0 is overwritten");
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assert.sameValue(result[1], 1, "Read-only element 1 is overwritten");
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assert.sameValue(result[2], 2, "Read-only element 2 is overwritten");
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assert.sameValue(result[3], 99, "Element 3 is not overwritten");
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});
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