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diff --git a/test/suite/intl402/ch12/12.3/12.3.2_1_c.js b/test/suite/intl402/ch12/12.3/12.3.2_1_c.js
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+// Copyright 2012 Mozilla Corporation. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/**
+ * @description Tests that format function is bound to its Intl.DateTimeFormat.
+ * @author Norbert Lindenberg
+ */
+
+$INCLUDE("testIntl.js");
+
+var dates = [new Date(), new Date(0), new Date(Date.parse("1989-11-09T17:57:00Z"))];
+var locales = [undefined, ["de"], ["th-u-ca-gregory-nu-thai"], ["en"], ["ja-u-ca-japanese"], ["ar-u-ca-islamicc-nu-arab"]];
+var options = [
+    undefined,
+    {hour12: false},
+    {month: "long", day: "numeric", hour: "2-digit", minute: "2-digit"}
+];
+
+locales.forEach(function (locales) {
+    options.forEach(function (options) {
+        var formatObj = new Intl.DateTimeFormat(locales, options);
+        var formatFunc = formatObj.format;
+        dates.forEach(function (date) {
+            var referenceFormatted = formatObj.format(date);
+            var formatted = formatFunc(date);
+            if (referenceFormatted !== formatted) {
+                $ERROR("format function produces different result than format method for locales " +
+                    locales + "; options: " + (options ? JSON.stringify(options) : options) +
+                    " : " + formatted + " vs. " + referenceFormatted + ".");
+            }
+        });
+    });
+});
+