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diff --git a/test/suite/intl402/ch13/13.2/13.2.1_5.js b/test/suite/intl402/ch13/13.2/13.2.1_5.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 Number.prototype.toLocaleString produces the same results as Intl.NumberFormat.
+ * @author Norbert Lindenberg
+ */
+
+$INCLUDE("testIntl.js");
+
+var numbers = [0, -0, 1, -1, 5.5, 123, -123, -123.45, 123.44501, 0.001234,
+    -0.00000000123, 0.00000000000000000000000000000123, 1.2, 0.0000000012344501,
+    123445.01, 12344501000000000000000000000000000, -12344501000000000000000000000000000,
+    Infinity, -Infinity, NaN];
+var locales = [undefined, ["de"], ["th-u-nu-thai"], ["en"], ["ja-u-nu-jpanfin"], ["ar-u-nu-arab"]];
+var options = [
+    undefined,
+    {style: "percent"},
+    {style: "currency", currency: "EUR", currencyDisplay: "symbol"},
+    {style: "currency", currency: "IQD", currencyDisplay: "symbol"},
+    {style: "currency", currency: "KMF", currencyDisplay: "symbol"},
+    {style: "currency", currency: "CLF", currencyDisplay: "symbol"},
+    {useGrouping: false, minimumIntegerDigits: 3, minimumFractionDigits: 1, maximumFractionDigits: 3}
+];
+
+locales.forEach(function (locales) {
+    options.forEach(function (options) {
+        var referenceNumberFormat = new Intl.NumberFormat(locales, options);
+        var referenceFormatted = numbers.map(referenceNumberFormat.format);
+        
+        var formatted = numbers.map(function (a) { return a.toLocaleString(locales, options); });
+        try {
+            testArraysAreSame(referenceFormatted, formatted);
+        } catch (e) {
+            e.message += " (Testing with locales " + locales + "; options " +
+            (options ? JSON.stringify(options) : options) + ".)";
+            throw e;
+        }
+    });
+});
+