mirror of https://github.com/tc39/test262.git
41 lines
1.1 KiB
JavaScript
41 lines
1.1 KiB
JavaScript
|
// 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 a synchronous iterable is closed when the asynchronous mapping
|
|||
|
|
function throws.
|
|||
|
|
info: |
|
|||
|
|
3.j.ii.6. If _mapping_ is *true*, then
|
|||
|
|
a. Let _mappedValue_ be Call(_mapfn_, _thisArg_, « _nextValue_, 𝔽(_k_) »).
|
|||
|
|
...
|
|||
|
|
c. Set _mappedValue_ to Await(_mappedValue_).
|
|||
|
|
d. IfAbruptCloseAsyncIterator(_mappedValue_, _iteratorRecord_).
|
|||
|
|
flags: [async]
|
|||
|
|
includes: [asyncHelpers.js]
|
|||
|
|
features: [Array.fromAsync]
|
|||
|
|
---*/
|
|||
|
|
|
|||
|
|
let closed = false;
|
|||
|
|
const iterator = {
|
|||
|
|
next() {
|
|||
|
|
return { value: 1, done: false };
|
|||
|
|
},
|
|||
|
|
return() {
|
|||
|
|
closed = true;
|
|||
|
|
return { done: true };
|
|||
|
|
},
|
|||
|
|
[Symbol.iterator]() {
|
|||
|
|
return this;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
asyncTest(async () => {
|
|||
|
|
await assert.throwsAsync(Error, () => Array.fromAsync(iterator, async (val) => {
|
|||
|
|
assert.sameValue(val, 1, "mapfn receives value from iterator");
|
|||
|
|
throw new Error("mapfn throws");
|
|||
|
|
}), "async mapfn rejecting should cause fromAsync to reject");
|
|||
|
|
assert(closed, "async mapfn rejecting should close iterator")
|
|||
|
|
});
|