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diff --git a/test/suite/intl402/ch12/12.2/12.2.3_c.js b/test/suite/intl402/ch12/12.2/12.2.3_c.js
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+// Copyright 2012 Mozilla Corporation. All rights reserved.
+// This code is governed by the license found in the LICENSE file.
+
+/**
+ * @description Tests that Intl.DateTimeFormat provides the required date-time
+ *     format component subsets.
+ * @author Norbert Lindenberg
+ */
+
+$INCLUDE("testIntl.js");
+
+var locales = ["de-DE", "en-US", "hi-IN", "id-ID", "ja-JP", "th-TH", "zh-Hans-CN", "zh-Hant-TW", "zxx"];
+var subsets = [
+    {weekday: "long", year: "numeric", month: "numeric", day: "numeric",
+        hour: "numeric", minute: "numeric", second: "numeric"},
+    {weekday: "long", year: "numeric", month: "numeric", day: "numeric"},
+    {year: "numeric", month: "numeric", day: "numeric"},
+    {year: "numeric", month: "numeric"},
+    {month: "numeric", day: "numeric"},
+    {hour: "numeric", minute: "numeric", second: "numeric"},
+    {hour: "numeric", minute: "numeric"}
+];
+
+locales.forEach(function (locale) {
+    subsets.forEach(function (subset) {
+        var format = new Intl.DateTimeFormat([locale], subset);
+        var actual = format.resolvedOptions();
+        getDateTimeComponents().forEach(function (component) {
+            if (actual.hasOwnProperty(component)) {
+                if (!subset.hasOwnProperty(component)) {
+                    $ERROR("Unrequested component " + component +
+                        " added to requested subset " + JSON.stringify(subset) +
+                        "; locale " + locale + ".");
+                }
+                try {
+                    testValidDateTimeComponentValue(component, actual[component]);
+                } catch (e) {
+                    e.message += " (Testing locale " + locale + "; subset " +
+                        JSON.stringify(subset) + ")";
+                    throw e;
+                }
+            } else {
+                if (subset.hasOwnProperty(component)) {
+                    $ERROR("Missing component " + component +
+                        " from requested subset " + JSON.stringify(subset) +
+                        "; locale " + locale + ".");
+                }
+            }
+        });
+    });
+});
+