Test for selected outputs of Intl.Locale.prototype.getNumberingSystems

test/intl402/Locale/prototype/getNumberingSystems/selected-outputs.js

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+// Copyright 2026 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-intl.locale.prototype.getNumberingSystems
+description: Tests selected, stable-ish outputs for locale numbering systems
+info: https://cldr.unicode.org/development/development-process/design-proposals/supported-numberingsystems
+includes: [compareArray.js]
+features: [Intl.Locale, Intl.Locale-info]
+locale: [ar, ar-SA, en, hi]
+---*/
+
+assert.compareArray(new Intl.Locale("en").getNumberingSystems(), ["latn"], "'en' locale only has 'latn' numbering");
+
+// Ref https://github.com/unicode-org/cldr/blob/3ffe59bfbf8066c1aa6fb208483c600cd115c8db/common/main/ar.xml#L5872-L5876
+const ar = new Intl.Locale("ar").getNumberingSystems();
+assert(ar.indexOf("latn") > -1, "'ar' has numbering system 'latn'");
+assert(ar.indexOf("arab") > -1, "'ar' has numbering system 'arab'");
+
+assert(ar.indexOf("latn") < ar.indexOf("arab"), "default numbering system of 'ar' is 'latn'");
+
+// Ref https://github.com/unicode-org/cldr/blob/3ffe59bfbf8066c1aa6fb208483c600cd115c8db/common/main/ar_SA.xml#L1383
+assert.compareArray(new Intl.Locale("ar-SA").getNumberingSystems(), ["arab"], "'ar-SA' overrides default 'latn' with 'arab'");
+
+// Ref https://github.com/unicode-org/cldr/blob/3ffe59bfbf8066c1aa6fb208483c600cd115c8db/common/main/hi.xml#L5531-L5534
+const hi = new Intl.Locale("hi").getNumberingSystems();
+assert(hi.indexOf("latn") > -1, "'hi' has numbering system 'latn'");
+assert(hi.indexOf("deva") > -1, "'hi' has numbering system 'deva'");
+
+assert(hi.indexOf("latn") < hi.indexOf("deva"), "default numbering system of 'hi' is 'latn'");