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+// Copyright (C) 2021 André Bargull. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-intl.supportedvaluesof
+description: >
+ The returned "numberingSystem" values can be used with DateTimeFormat.
+info: |
+ Intl.supportedValuesOf ( key )
+
+ 1. Let key be ? ToString(key).
+ ...
+ 5. Else if key is "numberingSystem", then
+ a. Let list be ! AvailableNumberingSystems( ).
+ ...
+ 9. Return ! CreateArrayFromList( list ).
+
+ AvailableNumberingSystems ( )
+ The AvailableNumberingSystems abstract operation returns a List, ordered as
+ if an Array of the same values had been sorted using %Array.prototype.sort%
+ using undefined as comparefn, that contains unique numbering systems
+ identifiers identifying the numbering systems for which the implementation
+ provides the functionality of Intl.DateTimeFormat, Intl.NumberFormat, and
+ Intl.RelativeTimeFormat objects. The list must include the Numbering System
+ value of every row of Table 4, except the header row.
+includes: [testIntl.js]
+locale: [en]
+features: [Intl-enumeration, Array.prototype.includes]
+---*/
+
+const numberingSystems = Intl.supportedValuesOf("numberingSystem");
+
+for (let numberingSystem of numberingSystems) {
+ let obj = new Intl.DateTimeFormat("en", {numberingSystem});
+ assert.sameValue(obj.resolvedOptions().numberingSystem, numberingSystem,
+ `${numberingSystem} is supported by DateTimeFormat`);
+}
+
+for (let numberingSystem of allNumberingSystems()) {
+ let obj = new Intl.DateTimeFormat("en", {numberingSystem});
+ if (obj.resolvedOptions().numberingSystem === numberingSystem) {
+ assert(numberingSystems.includes(numberingSystem),
+ `${numberingSystem} supported but not returned by supportedValuesOf`);
+ } else {
+ assert(!numberingSystems.includes(numberingSystem),
+ `${numberingSystem} not supported but returned by supportedValuesOf`);
+ }
+}
+
+reportCompare(0, 0);