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// |reftest| async
// Copyright (C) 2023 Igalia, S.L. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: sec-array.fromasync
description: >
The iterator of an asynchronous iterable is closed when the synchronous
mapping function throws.
info: |
3.j.ii.6. If _mapping_ is *true*, then
a. Let _mappedValue_ be Call(_mapfn_, _thisArg_, « _nextValue_, 𝔽(_k_) »).
b. IfAbruptCloseAsyncIterator(_mappedValue_, _iteratorRecord_).
...
flags: [async]
includes: [asyncHelpers.js]
features: [Array.fromAsync]
---*/
let closed = false;
const iterator = {
next() {
return Promise.resolve({ value: 1, done: false });
},
return() {
closed = true;
return Promise.resolve({ done: true });
},
[Symbol.asyncIterator]() {
return this;
}
}
asyncTest(async () => {
await assert.throwsAsync(Error, () => Array.fromAsync(iterator, (val) => {
assert.sameValue(val, 1, "mapfn receives value from iterator");
throw new Error("mapfn throws");
}), "sync mapfn throwing should cause fromAsync to reject");
assert(closed, "sync mapfn throwing should close iterator")
});