mirror of https://github.com/tc39/test262.git
56 lines
2.3 KiB
JavaScript
56 lines
2.3 KiB
JavaScript
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// 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 "numberingSystem" 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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...
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5. Else if key is "numberingSystem", then
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a. Let list be ! AvailableNumberingSystems( ).
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...
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9. Return ! CreateArrayFromList( list ).
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AvailableNumberingSystems ( )
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The AvailableNumberingSystems abstract operation returns a List, ordered as
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if an Array of the same values had been sorted using %Array.prototype.sort%
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using undefined as comparefn, that contains unique numbering systems
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identifiers identifying the numbering systems for which the implementation
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provides the functionality of Intl.DateTimeFormat, Intl.NumberFormat, and
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Intl.RelativeTimeFormat objects. The list must include the Numbering System
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value of every row of Table 4, except the header row.
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includes: [compareArray.js]
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features: [Intl-enumeration, Intl.Locale]
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---*/
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const numberingSystems = Intl.supportedValuesOf("numberingSystem");
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assert(Array.isArray(numberingSystems), "Returns an Array object.");
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assert.sameValue(Object.getPrototypeOf(numberingSystems), Array.prototype,
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"The array prototype is Array.prototype");
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const otherNumberingSystems = Intl.supportedValuesOf("numberingSystem");
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assert.notSameValue(otherNumberingSystems, numberingSystems,
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"Returns a new array object for each call.");
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assert.compareArray(numberingSystems, otherNumberingSystems.sort(),
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"The array is sorted.");
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assert.sameValue(new Set(numberingSystems).size, numberingSystems.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})*$/;
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for (let numberingSystem of numberingSystems) {
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assert(typeRE.test(numberingSystem), `${numberingSystem} matches the 'type' production`);
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}
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for (let numberingSystem of numberingSystems) {
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assert.sameValue(new Intl.Locale("und", {numberingSystem}).numberingSystem, numberingSystem,
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`${numberingSystem} is canonicalised`);
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}
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