mirror of https://github.com/tc39/test262.git
58 lines
2.1 KiB
JavaScript
58 lines
2.1 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 "timeZone" values are sorted, unique, and canonicalised.
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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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6. Else if key is "timeZone", then
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a. Let list be ! AvailableTimeZones( ).
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...
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9. Return ! CreateArrayFromList( list ).
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AvailableTimeZones ()
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The AvailableTimeZones abstract operation returns a sorted List of supported
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Zone and Link names in the IANA Time Zone Database. The following steps are
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taken:
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1. Let names be a List of all supported Zone and Link names in the IANA Time
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Zone Database.
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2. Let result be a new empty List.
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3. For each element name of names, do
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a. Assert: ! IsValidTimeZoneName( name ) is true.
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b. Let canonical be ! CanonicalizeTimeZoneName( name ).
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c. If result does not contain an element equal to canonical, then
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i. Append canonical to the end of result.
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4. Sort result in order as if an Array of the same values had been sorted using
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%Array.prototype.sort% using undefined as comparefn.
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5. Return result.
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includes: [compareArray.js, testIntl.js]
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features: [Intl-enumeration]
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---*/
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const timeZones = Intl.supportedValuesOf("timeZone");
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assert(Array.isArray(timeZones), "Returns an Array object.");
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assert.sameValue(Object.getPrototypeOf(timeZones), Array.prototype,
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"The array prototype is Array.prototype");
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const otherTimeZones = Intl.supportedValuesOf("timeZone");
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assert.notSameValue(otherTimeZones, timeZones,
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"Returns a new array object for each call.");
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assert.compareArray(timeZones, otherTimeZones.sort(),
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"The array is sorted.");
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assert.sameValue(new Set(timeZones).size, timeZones.length,
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"The array doesn't contain duplicates.");
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for (let timeZone of timeZones) {
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assert(isCanonicalizedStructurallyValidTimeZoneName(timeZone),
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`${timeZone} is a canonicalised and structurally valid time zone name`);
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}
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