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Diffstat (limited to 'js/src/tests/test262/built-ins/Array/fromAsync/mapfn-async-throws-close-sync-iterator.js')
-rw-r--r-- | js/src/tests/test262/built-ins/Array/fromAsync/mapfn-async-throws-close-sync-iterator.js | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/Array/fromAsync/mapfn-async-throws-close-sync-iterator.js b/js/src/tests/test262/built-ins/Array/fromAsync/mapfn-async-throws-close-sync-iterator.js new file mode 100644 index 0000000000..7a9480a698 --- /dev/null +++ b/js/src/tests/test262/built-ins/Array/fromAsync/mapfn-async-throws-close-sync-iterator.js @@ -0,0 +1,41 @@ +// |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 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") +}); |