mirror of https://github.com/tc39/test262.git
76 lines
3.6 KiB
JavaScript
76 lines
3.6 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 a wrapper this-value or the
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global, according to the usual rules of sloppy 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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OrdinaryCallBindThis, when _F_.[[ThisMode]] is ~global~, where _F_ is the
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function object:
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6. Else,
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a. If _thisArgument_ is *undefined* or *null*, then
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i. Let _globalEnv_ be _calleeRealm_.[[GlobalEnv]].
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ii. Assert: _globalEnv_ is a Global Environment Record.
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iii. Let _thisValue_ be _globalEnv_.[[GlobalThisValue]].
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b. Else,
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i. Let _thisValue_ be ! ToObject(_thisArgument_).
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ii. NOTE: ToObject produces wrapper objects using _calleeRealm_.
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flags: [async, noStrict]
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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(
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this,
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globalThis,
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"the global should be bound as the this-value of mapfn when thisArg is undefined"
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);
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}, undefined);
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await Array.fromAsync([1, 2, 3], async function () {
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assert.sameValue(
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this,
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globalThis,
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"the global should be bound as the this-value of mapfn when thisArg is null"
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);
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}, null);
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await Array.fromAsync([1, 2, 3], async function () {
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assert.notSameValue(this, "string", "string thisArg should not be bound as the this-value of mapfn");
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assert.sameValue(typeof this, "object", "a String wrapper object should be bound as the this-value of mapfn when thisArg is a string")
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assert.sameValue(this.valueOf(), "string", "String wrapper object should have the same primitive value as thisArg");
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}, "string");
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await Array.fromAsync([1, 2, 3], async function () {
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assert.notSameValue(this, 3.1416, "number thisArg should be not bound as the this-value of mapfn");
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assert.sameValue(typeof this, "object", "a Number wrapper object should be bound as the this-value of mapfn when thisArg is a number")
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assert.sameValue(this.valueOf(), 3.1416, "Number wrapper object should have the same primitive value as thisArg");
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}, 3.1416);
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await Array.fromAsync([1, 2, 3], async function () {
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assert.notSameValue(this, 42n, "bigint thisArg should not be bound as the this-value of mapfn");
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assert.sameValue(typeof this, "object", "a BigInt wrapper object should be bound as the this-value of mapfn when thisArg is a bigint")
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assert.sameValue(this.valueOf(), 42n, "BigInt wrapper object should have the same primitive value as thisArg");
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}, 42n);
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await Array.fromAsync([1, 2, 3], async function () {
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assert.notSameValue(this, true, "boolean thisArg should not be bound as the this-value of mapfn");
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assert.sameValue(typeof this, "object", "a Boolean wrapper object should be bound as the this-value of mapfn when thisArg is a boolean")
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assert.sameValue(this.valueOf(), true, "Boolean wrapper object should have the same primitive value as thisArg");
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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.notSameValue(this, symbolThis, "symbol thisArg should not be bound as the this-value of mapfn");
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assert.sameValue(typeof this, "object", "a Symbol wrapper object should be bound as the this-value of mapfn when thisArg is a symbol")
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assert.sameValue(this.valueOf(), symbolThis, "Symbol wrapper object should have the same primitive value as thisArg");
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}, symbolThis);
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});
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