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// |reftest| async
// Copyright (C) 2022 Igalia, S.L. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: sec-array.fromasync
description: >
Array.fromAsync handles a sync iterator returned from @@asyncIterator
includes: [asyncHelpers.js, compareArray.js, temporalHelpers.js]
flags: [async]
features: [Array.fromAsync]
---*/
asyncTest(async function () {
function * syncGen() {
for (let i = 0; i < 4; i++) {
yield i * 2;
}
}
const actual = [];
const items = {};
TemporalHelpers.observeProperty(actual, items, Symbol.asyncIterator, syncGen, "items");
TemporalHelpers.observeProperty(actual, items, Symbol.iterator, undefined, "items");
TemporalHelpers.observeProperty(actual, items, "length", 2, "items");
TemporalHelpers.observeProperty(actual, items, 0, 2, "items");
TemporalHelpers.observeProperty(actual, items, 1, 1, "items");
const result = await Array.fromAsync(items);
assert.compareArray(result, [0, 2, 4, 6]);
assert.compareArray(actual, [
"get items[Symbol.asyncIterator]",
]);
});