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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
50 lines
1.8 KiB
JavaScript
50 lines
1.8 KiB
JavaScript
// Copyright (C) 2022 Igalia, S.L. All rights reserved.
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// This code is governed by the BSD license found in the LICENSE file.
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/*---
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esid: sec-array.fromasync
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description: >
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If thisArg is a primitive, mapfn is called with it as the this-value in strict
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mode
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info: |
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6. If _mapping_ is *true*, then
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a. Let _mappedValue_ be Call(_mapfn_, _thisArg_, « _nextValue_, 𝔽(_k_) »).
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In OrdinaryCallBindThis, _thisArgument_ is always bound as the this-value in
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strict mode (_F_.[[ThisMode]] is ~strict~, where _F_ is the function object.)
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flags: [async, onlyStrict]
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includes: [asyncHelpers.js]
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features: [Array.fromAsync]
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---*/
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asyncTest(async () => {
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await Array.fromAsync([1, 2, 3], async function () {
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assert.sameValue(this, undefined, "undefined thisArg should be bound as the this-value of mapfn");
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}, undefined);
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await Array.fromAsync([1, 2, 3], async function () {
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assert.sameValue(this, null, "null thisArg should be bound as the this-value of mapfn");
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}, null);
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await Array.fromAsync([1, 2, 3], async function () {
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assert.sameValue(this, "string", "string thisArg should be bound as the this-value of mapfn");
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}, "string");
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await Array.fromAsync([1, 2, 3], async function () {
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assert.sameValue(this, 3.1416, "number thisArg should be bound as the this-value of mapfn");
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}, 3.1416);
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await Array.fromAsync([1, 2, 3], async function () {
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assert.sameValue(this, 42n, "bigint thisArg should be bound as the this-value of mapfn");
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}, 42n);
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await Array.fromAsync([1, 2, 3], async function () {
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assert.sameValue(this, true, "boolean thisArg should be bound as the this-value of mapfn");
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}, true);
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const symbolThis = Symbol("symbol");
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await Array.fromAsync([1, 2, 3], async function () {
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assert.sameValue(this, symbolThis, "symbol thisArg should be bound as the this-value of mapfn");
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}, symbolThis);
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});
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