mirror of https://github.com/tc39/test262.git
55 lines
2.0 KiB
JavaScript
55 lines
2.0 KiB
JavaScript
// Copyright (C) 2021 André Bargull. 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.supportedvaluesof
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description: >
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The returned "calendar" values are sorted, unique, and match the type production.
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info: |
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Intl.supportedValuesOf ( key )
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1. Let key be ? ToString(key).
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2. If key is "calendar", then
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a. Let list be ! AvailableCalendars( ).
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...
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9. Return ! CreateArrayFromList( list ).
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AvailableCalendars ( )
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The AvailableCalendars abstract operation returns a List, ordered as if an
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Array of the same values had been sorted using %Array.prototype.sort% using
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undefined as comparefn, that contains unique calendar types identifying the
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calendars for which the implementation provides the functionality of
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Intl.DateTimeFormat objects. The list must include "gregory".
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includes: [compareArray.js]
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features: [Intl-enumeration, Intl.Locale, Array.prototype.includes]
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---*/
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const calendars = Intl.supportedValuesOf("calendar");
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assert(Array.isArray(calendars), "Returns an Array object.");
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assert.sameValue(Object.getPrototypeOf(calendars), Array.prototype,
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"The array prototype is Array.prototype");
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const otherCalendars = Intl.supportedValuesOf("calendar");
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assert.notSameValue(otherCalendars, calendars,
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"Returns a new array object for each call.");
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assert.compareArray(calendars, otherCalendars.sort(),
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"The array is sorted.");
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assert.sameValue(new Set(calendars).size, calendars.length,
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"The array doesn't contain duplicates.");
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// https://unicode.org/reports/tr35/tr35.html#Unicode_locale_identifier
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const typeRE = /^[a-z0-9]{3,8}(-[a-z0-9]{3,8})*$/;
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for (let calendar of calendars) {
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assert(typeRE.test(calendar), `${calendar} matches the 'type' production`);
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}
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for (let calendar of calendars) {
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assert.sameValue(new Intl.Locale("und", {calendar}).calendar, calendar,
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`${calendar} is canonicalised`);
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}
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assert(calendars.includes("gregory"), "Includes the Gregorian calendar.");
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