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// |reftest| shell-option(--enable-array-from-async) skip-if(!Array.fromAsync||!xulRuntime.shell) async -- Array.fromAsync is not enabled unconditionally, requires shell-options
// 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 respects array mutation
info: |
Array.fromAsync
3.j.ii.3. Let next be ? Await(IteratorStep(iteratorRecord)).
IteratorStep
1. Let result be ? IteratorNext(iteratorRecord).
IteratorNext
1.a. Let result be ? Call(iteratorRecord.[[NextMethod]], iteratorRecord.[[Iterator]]).
%AsyncFromSyncIteratorPrototype%.next
6.a. Let result be Completion(IteratorNext(syncIteratorRecord)).
IteratorNext
1.a. Let result be ? Call(iteratorRecord.[[NextMethod]], iteratorRecord.[[Iterator]]).
Array.prototype [ @@iterator ] ( )
Array.prototype.values ( )
2. Return CreateArrayIterator(O, value).
CreateArrayIterator
1.b.iii. If index ≥ len, return NormalCompletion(undefined).
includes: [asyncHelpers.js, compareArray.js]
flags: [async]
features: [Array.fromAsync]
---*/
asyncTest(async function () {
const items = [];
const promise = Array.fromAsync(items);
// By the time we get here, the first next() call has already happened, and returned
// { done: true }. We then return from the loop in Array.fromAsync 3.j.ii. with the empty array,
// and the following line no longer affects that.
items.push(7);
const result = await promise;
assert.compareArray(result, []);
});
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