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diff --git a/test/suite/intl402/ch13/13.3/13.3.0_7.js b/test/suite/intl402/ch13/13.3/13.3.0_7.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 Date.prototype.toLocaleString & Co. produces the same results as Intl.DateTimeFormat.
+ * @author Norbert Lindenberg
+ */
+
+$INCLUDE("testIntl.js");
+
+var functions = {
+    toLocaleString: [Date.prototype.toLocaleString,
+        {year: "numeric", month: "numeric", day: "numeric", hour: "numeric", minute: "numeric", second: "numeric"}],
+    toLocaleDateString: [Date.prototype.toLocaleDateString,
+        {year: "numeric", month: "numeric", day: "numeric"}],
+    toLocaleTimeString: [Date.prototype.toLocaleTimeString,
+        {hour: "numeric", minute: "numeric", second: "numeric"}]
+};
+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"}
+];
+
+Object.getOwnPropertyNames(functions).forEach(function (p) {
+    var f = functions[p][0];
+    var defaults = functions[p][1];
+    locales.forEach(function (locales) {
+        options.forEach(function (options) {
+            var constructorOptions = options;
+            if (options === undefined) {
+                constructorOptions = defaults;
+            } else if (options.day === undefined) {
+                // for simplicity, our options above have either both date and time or neither
+                constructorOptions = Object.create(defaults);
+                for (var prop in options) {
+                    if (options.hasOwnProperty(prop)) {
+                        constructorOptions[prop] = options[prop];
+                    }
+                }
+            }
+            var referenceDateTimeFormat = new Intl.DateTimeFormat(locales, constructorOptions);
+            var referenceFormatted = dates.map(referenceDateTimeFormat.format);
+            
+            var formatted = dates.map(function (a) { return f.call(a, locales, options); });
+            try {
+                testArraysAreSame(referenceFormatted, formatted);
+            } catch (e) {
+                e.message += " (Testing with locales " + locales + "; options " +
+                    (options ? JSON.stringify(options) : options) + ".)";
+                throw e;
+            }
+        });
+    });
+});
+