mirror of
https://github.com/tc39/test262.git
synced 2025-10-30 11:13:51 +01:00
c4d8f01d3d
- normal case with synchronous and asynchronous mapfn - a non-callable value is passed as mapfn - behaviour of various values of thisArg in strict and sloppy mode - mapfn result is awaited once per iteration - iterator is closed when mapfn throws
29 lines
874 B
JavaScript
29 lines
874 B
JavaScript
// Copyright (C) 2022 Igalia, S.L. All rights reserved.
|
||
// This code is governed by the BSD license found in the LICENSE file.
|
||
|
||
/*---
|
||
esid: sec-array.fromasync
|
||
description: >
|
||
If thisArg is omitted, mapfn is called with undefined as the this-value in
|
||
strict mode
|
||
info: |
|
||
6. If _mapping_ is *true*, then
|
||
a. Let _mappedValue_ be Call(_mapfn_, _thisArg_, « _nextValue_, 𝔽(_k_) »).
|
||
|
||
In OrdinaryCallBindThis, _thisArgument_ is always bound as the this-value in
|
||
strict mode (_F_.[[ThisMode]] is ~strict~, where _F_ is the function object.)
|
||
flags: [async, onlyStrict]
|
||
includes: [asyncHelpers.js]
|
||
features: [Array.fromAsync]
|
||
---*/
|
||
|
||
asyncTest(async () => {
|
||
await Array.fromAsync([1, 2, 3], async function () {
|
||
assert.sameValue(
|
||
this,
|
||
undefined,
|
||
"undefined should be bound as the this-value of mapfn when thisArg is omitted"
|
||
);
|
||
});
|
||
});
|