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diff --git a/js/src/tests/non262/Intl/supportedValuesOf-collation.js b/js/src/tests/non262/Intl/supportedValuesOf-collation.js
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+++ b/js/src/tests/non262/Intl/supportedValuesOf-collation.js
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+// |reftest| skip-if(!this.hasOwnProperty("Intl"))
+
+const collations = Intl.supportedValuesOf("collation");
+
+assertEq(new Set(collations).size, collations.length, "No duplicates are present");
+assertEqArray(collations, [...collations].sort(), "The list is sorted");
+
+const typeRE = /^[a-z0-9]{3,8}(-[a-z0-9]{3,8})*$/;
+for (let collation of collations) {
+ assertEq(typeRE.test(collation), true, `${collation} matches the 'type' production`);
+}
+
+for (let collation of collations) {
+ assertEq(new Intl.Locale("und", {collation}).collation, collation, `${collation} is canonicalised`);
+}
+
+// Not all locales support all possible collations, so test the minimal set to
+// cover all supported collations.
+const locales = [
+ "en", // "emoji", "eor"
+ "ar", // compat
+ "de", // phonebk
+ "es", // trad
+ "ko", // searchjl
+ "ln", // phonetic
+ "si", // dict
+ "sv", // reformed
+ "zh", // big5han, gb2312, pinyin, stroke, unihan, zhuyin
+];
+
+for (let collation of collations) {
+ let supported = false;
+ for (let locale of locales) {
+ let obj = new Intl.Collator(locale, {collation});
+ if (obj.resolvedOptions().collation === collation) {
+ supported = true;
+ }
+ }
+
+ assertEq(supported, true, `${collation} is supported by Collator`);
+}
+
+if (typeof reportCompare === "function")
+ reportCompare(true, true);