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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>
39 lines
1.1 KiB
JavaScript
39 lines
1.1 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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Promise is rejected if length property on an instance of a custom this-value
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is non-writable
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info: |
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3.j.ii.4.a. Perform ? Set(_A_, *"length"*, 𝔽(_k_), *true*).
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...
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3.k.viii. Perform ? Set(_A_, *"length"*, 𝔽(_len_), *true*).
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Note that there is no difference between strict mode and sloppy mode, because
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we are not following runtime evaluation semantics.
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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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Object.defineProperty(this, "length", {
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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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await assert.throwsAsync(TypeError, () => Array.fromAsync.call(MyArray, [0, 1, 2]), "Setting read-only length fails");
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await assert.throwsAsync(TypeError, () => 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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}), "Setting read-only length fails in array-like case");
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});
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