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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>
24 lines
710 B
JavaScript
24 lines
710 B
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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Treats an asyncItems object that isn't an array-like as a 0-length array-like
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info: |
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3.k.iii. Let _len_ be ? LengthOfArrayLike(_arrayLike_).
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features: [Array.fromAsync]
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flags: [async]
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includes: [asyncHelpers.js, compareArray.js]
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---*/
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asyncTest(async function () {
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const notArrayLike = Object.create(null);
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notArrayLike[0] = 0;
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notArrayLike[1] = 1;
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notArrayLike[2] = 2;
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const array = await Array.fromAsync(notArrayLike);
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assert.compareArray(array, [], "non-array-like object is treated as 0-length array-like");
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});
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