mirror of https://github.com/tc39/test262.git
34 lines
1.1 KiB
JavaScript
34 lines
1.1 KiB
JavaScript
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// Copyright (C) 2022 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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Array.fromAsync handles a sync iterator returned from @@iterator
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includes: [asyncHelpers.js, compareArray.js, temporalHelpers.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 * syncGen() {
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for (let i = 0; i < 4; i++) {
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yield i * 2;
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}
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}
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const actual = [];
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const items = {};
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TemporalHelpers.observeProperty(actual, items, Symbol.asyncIterator, undefined, "items");
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TemporalHelpers.observeProperty(actual, items, Symbol.iterator, syncGen, "items");
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TemporalHelpers.observeProperty(actual, items, "length", 2, "items");
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TemporalHelpers.observeProperty(actual, items, 0, 2, "items");
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TemporalHelpers.observeProperty(actual, items, 1, 1, "items");
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const result = await Array.fromAsync(items);
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assert.compareArray(result, [0, 2, 4, 6]);
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assert.compareArray(actual, [
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"get items[Symbol.asyncIterator]",
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"get items[Symbol.iterator]",
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]);
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});
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