mirror of https://github.com/tc39/test262.git
60 lines
1.7 KiB
JavaScript
60 lines
1.7 KiB
JavaScript
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// Copyright (C) 2019 Leo Balter. 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-Intl.DisplayNames
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description: >
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CanonicalizeLocaleList tries to fetch length from Object.
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info: |
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Intl.DisplayNames ([ locales [ , options ]])
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1. If NewTarget is undefined, throw a TypeError exception.
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2. Let displayNames be ? OrdinaryCreateFromConstructor(NewTarget, "%DisplayNamesPrototype%",
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« [[InitializedDisplayNames]], [[Locale]], [[Style]], [[Type]], [[Fallback]], [[Fields]] »).
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3. Let requestedLocales be ? CanonicalizeLocaleList(locales).
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...
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CanonicalizeLocaleList ( locales )
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1. If locales is undefined, then
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a. Return a new empty List.
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2. Let seen be a new empty List.
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3. If Type(locales) is String, then
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a. Let O be CreateArrayFromList(« locales »).
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4. Else,
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a. Let O be ? ToObject(locales).
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5. Let len be ? ToLength(? Get(O, "length")).
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features: [Intl.DisplayNames, Symbol]
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locale: [en]
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includes: [compareArray.js]
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---*/
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var calls = [];
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var symbol = Symbol();
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Symbol.prototype.length = 1;
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Object.defineProperty(Symbol.prototype, 'length', {
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get() {
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assert.notSameValue(this, symbol, 'this is an object from given symbol');
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assert.sameValue(this.valueOf(), symbol, 'internal value is the symbol');
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assert(this instanceof Symbol);
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calls.push('length');
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return 1;
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}
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});
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Object.defineProperty(Symbol.prototype, '0', {
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get() {
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assert.notSameValue(this, symbol, 'this is an object from given symbol');
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assert.sameValue(this.valueOf(), symbol, 'internal value is the symbol');
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assert(this instanceof Symbol);
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calls.push('0');
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return 'en';
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}
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});
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new Intl.DisplayNames(symbol);
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assert.compareArray(calls, ['length', '0']);
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