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diff --git a/test/suite/intl402/ch10/10.1/10.1.2_a.js b/test/suite/intl402/ch10/10.1/10.1.2_a.js
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+// Copyright 2011-2012 Norbert Lindenberg. All rights reserved.
+// Copyright 2012 Mozilla Corporation. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/**
+ * @description Tests that Intl.Collator can be subclassed.
+ * @author Norbert Lindenberg
+ */
+
+$INCLUDE("testIntl.js");
+
+// get a collator and have it sort an array for comparison with the subclass
+var locales = ["tlh", "id", "en"];
+var a = ["A", "C", "E", "B", "D", "F"];
+var referenceCollator = new Intl.Collator(locales);
+var referenceSorted = a.slice().sort(referenceCollator.compare);
+
+function MyCollator(locales, options) {
+    Intl.Collator.call(this, locales, options);
+    // could initialize MyCollator properties
+}
+
+MyCollator.prototype = Object.create(Intl.Collator.prototype);
+MyCollator.prototype.constructor = MyCollator;
+// could add methods to MyCollator.prototype
+
+var collator = new MyCollator(locales);
+a.sort(collator.compare);
+testArraysAreSame(referenceSorted, a);
+