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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>
41 lines
1.2 KiB
JavaScript
41 lines
1.2 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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Use the intrinsic @@iterator and @@asyncIterator to check iterability
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includes: [compareArray.js, 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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// Replace the user-reachable Symbol.iterator and Symbol.asyncIterator with
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// fake symbol keys
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const originalSymbol = globalThis.Symbol;
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const fakeIteratorSymbol = Symbol("iterator");
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const fakeAsyncIteratorSymbol = Symbol("asyncIterator");
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globalThis.Symbol = {
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iterator: fakeIteratorSymbol,
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asyncIterator: fakeAsyncIteratorSymbol,
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};
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const input = {
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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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[fakeIteratorSymbol]() {
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throw new Test262Error("The fake Symbol.iterator method should not be called");
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},
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[fakeAsyncIteratorSymbol]() {
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throw new Test262Error("The fake Symbol.asyncIterator method should not be called");
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}
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};
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const output = await Array.fromAsync(input);
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assert.compareArray(output, [0, 1, 2]);
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globalThis.Symbol = originalSymbol;
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});
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