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+// Copyright 2012 Norbert Lindenberg. All rights reserved.
+// Copyright 2012 Mozilla Corporation. All rights reserved.
+// This code is governed by the license found in the LICENSE file.
+
+/**
+ * @description Tests that the function returned by Intl.Collator.prototype.compare
+ * returns 0 when comparing Strings that are considered canonically equivalent
+ * by the Unicode standard.
+ * @author Norbert Lindenberg
+ */
+
+var collator = new Intl.Collator();
+var pairs = [
+ // example from Unicode 5.0, section 3.7, definition D70
+ ["o\u0308", "ö"],
+ // examples from Unicode 5.0, chapter 3.11
+ ["ä\u0323", "a\u0323\u0308"],
+ ["a\u0308\u0323", "a\u0323\u0308"],
+ ["ạ\u0308", "a\u0323\u0308"],
+ ["ä\u0306", "a\u0308\u0306"],
+ ["ă\u0308", "a\u0306\u0308"],
+ // example from Unicode 5.0, chapter 3.12
+ ["\u1111\u1171\u11B6", "퓛"],
+ // examples from UTS 10, Unicode Collation Algorithm
+ ["Å", "Å"],
+ ["Å", "A\u030A"],
+ ["x\u031B\u0323", "x\u0323\u031B"],
+ ["ự", "ụ\u031B"],
+ ["ự", "u\u031B\u0323"],
+ ["ự", "ư\u0323"],
+ ["ự", "u\u0323\u031B"],
+ // examples from UAX 15, Unicode Normalization Forms
+ ["Ç", "C\u0327"],
+ ["q\u0307\u0323", "q\u0323\u0307"],
+ ["가", "\u1100\u1161"],
+ ["Å", "A\u030A"],
+ ["Ω", "Ω"],
+ ["Å", "A\u030A"],
+ ["ô", "o\u0302"],
+ ["ṩ", "s\u0323\u0307"],
+ ["ḋ\u0323", "d\u0323\u0307"],
+ ["ḋ\u0323", "ḍ\u0307"],
+ ["q\u0307\u0323", "q\u0323\u0307"],
+ // examples involving supplementary characters from UCD NormalizationTest.txt
+ ["\uD834\uDD5E", "\uD834\uDD57\uD834\uDD65"],
+ ["\uD87E\uDC2B", "北"]
+
+];
+var i;
+for (i = 0; i < pairs.length; i++) {
+ var pair = pairs[i];
+ if (collator.compare(pair[0], pair[1]) !== 0) {
+ $ERROR("Collator.compare considers " + pair[0] + " ≠ " + pair[1] + ".");
+ }
+}
+