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diff --git a/js/src/tests/ecma_2/Exceptions/number-001.js b/js/src/tests/ecma_2/Exceptions/number-001.js
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+/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+
+/**
+   File Name:          number-001
+   Corresponds To:     15.7.4.2-2-n.js
+   ECMA Section:       15.7.4.2.2 Number.prototype.toString()
+   Description:
+   If the radix is the number 10 or not supplied, then this number value is
+   given as an argument to the ToString operator; the resulting string value
+   is returned.
+
+   If the radix is supplied and is an integer from 2 to 36, but not 10, the
+   result is a string, the choice of which is implementation dependent.
+
+   The toString function is not generic; it generates a runtime error if its
+   this value is not a Number object. Therefore it cannot be transferred to
+   other kinds of objects for use as a method.
+
+   Author:             christine@netscape.com
+   Date:               16 september 1997
+*/
+var SECTION = "number-001";
+var VERSION = "JS1_4";
+var TITLE   = "Exceptions for Number.toString()";
+
+startTest();
+writeHeaderToLog( SECTION + " Number.prototype.toString()");
+
+var result = "Failed";
+var exception = "No exception thrown";
+var expect = "Passed";
+
+try {
+  object= new Object();
+  object.toString = Number.prototype.toString;
+  result = object.toString();
+} catch ( e ) {
+  result = expect;
+  exception = e.toString();
+}
+
+new TestCase(
+  SECTION,
+  "object = new Object(); object.toString = Number.prototype.toString; object.toString()" +
+  " (threw " + exception +")",
+  expect,
+  result );
+
+test();