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Diffstat (limited to 'js/src/tests/test262/built-ins/Array/fromAsync/mapfn-async-arraylike.js')
-rw-r--r-- | js/src/tests/test262/built-ins/Array/fromAsync/mapfn-async-arraylike.js | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/Array/fromAsync/mapfn-async-arraylike.js b/js/src/tests/test262/built-ins/Array/fromAsync/mapfn-async-arraylike.js new file mode 100644 index 0000000000..5b6ddf60b1 --- /dev/null +++ b/js/src/tests/test262/built-ins/Array/fromAsync/mapfn-async-arraylike.js @@ -0,0 +1,36 @@ +// |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: > + An asynchronous mapping function is applied to each (awaited) item of an + arraylike. +info: | + 3.k.vii.4. If _mapping_ is *true*, then + a. Let _mappedValue_ be ? Call(_mapfn_, _thisArg_, « _nextValue_, 𝔽(_k_) »). + b. Let _mappedValue_ be ? Await(_mappedValue_). + ... + 6. Perform ? CreateDataPropertyOrThrow(_A_, _Pk_, _mappedValue_). +flags: [async] +includes: [asyncHelpers.js, compareArray.js] +features: [Array.fromAsync] +---*/ + +const arrayLike = { + length: 4, + 0: 0, + 1: 2, + 2: Promise.resolve(4), + 3: 6, +}; + +async function asyncMap(val, ix) { + return Promise.resolve(val * ix); +} + +asyncTest(async () => { + const result = await Array.fromAsync(arrayLike, asyncMap); + assert.compareArray(result, [0, 2, 8, 18], "async mapfn should be applied to arraylike"); +}); |