diff options
Diffstat (limited to 'js/src/tests/test262/built-ins/Array/fromAsync/mapfn-sync-throws-close-async-iterator.js')
-rw-r--r-- | js/src/tests/test262/built-ins/Array/fromAsync/mapfn-sync-throws-close-async-iterator.js | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/Array/fromAsync/mapfn-sync-throws-close-async-iterator.js b/js/src/tests/test262/built-ins/Array/fromAsync/mapfn-sync-throws-close-async-iterator.js new file mode 100644 index 0000000000..a351445f1d --- /dev/null +++ b/js/src/tests/test262/built-ins/Array/fromAsync/mapfn-sync-throws-close-async-iterator.js @@ -0,0 +1,40 @@ +// |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") +}); |