mirror of https://github.com/tc39/test262.git
45 lines
1.5 KiB
JavaScript
45 lines
1.5 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 "timeZone" values can be used with DateTimeFormat.
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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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locale: [en]
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features: [Intl-enumeration]
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---*/
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const timeZones = Intl.supportedValuesOf("timeZone");
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for (let timeZone of timeZones) {
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let obj = new Intl.DateTimeFormat("en", {timeZone});
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assert.sameValue(obj.resolvedOptions().timeZone, timeZone,
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`${timeZone} is supported by DateTimeFormat`);
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}
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