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diff --git a/js/src/tests/ecma_3/Date/15.9.5.4.js b/js/src/tests/ecma_3/Date/15.9.5.4.js
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@@ -0,0 +1,151 @@
+/* -*- 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:    15.9.5.4.js
+   ECMA Section: 15.9.5.4 Date.prototype.toTimeString()
+   Description:
+   This function returns a string value. The contents of the string are
+   implementation dependent, but are intended to represent the "time"
+   portion of the Date in the current time zone in a convenient,
+   human-readable form.   We test the content of the string by checking
+   that d.toDateString()  +  d.toTimeString()  ==  d.toString()
+
+   Author:  pschwartau@netscape.com                            
+   Date:    14 november 2000
+   Revised: 07 january 2002  because of a change in JS Date format:
+
+   See http://bugzilla.mozilla.org/show_bug.cgi?id=118266 (SpiderMonkey)
+   See http://bugzilla.mozilla.org/show_bug.cgi?id=118636 (Rhino)
+*/
+//-----------------------------------------------------------------------------
+var SECTION = "15.9.5.4";
+var VERSION = "ECMA_3"; 
+var TITLE   = "Date.prototype.toTimeString()";
+  
+var status = '';
+var actual = ''; 
+var expect = '';
+var givenDate;
+var year = '';
+var regexp = '';
+var reducedDateString = '';
+var hopeThisIsTimeString = '';
+var cnEmptyString = '';
+var cnERR ='OOPS! FATAL ERROR: no regexp match in extractTimeString()';
+
+startTest();
+writeHeaderToLog( SECTION + " "+ TITLE);
+
+// first, a couple of generic tests -
+
+status = "typeof (now.toTimeString())"; 
+actual =   typeof (now.toTimeString());
+expect = "string";
+addTestCase();
+
+status = "Date.prototype.toTimeString.length";  
+actual =  Date.prototype.toTimeString.length;
+expect =  0;  
+addTestCase();
+
+// 1970
+addDateTestCase(0);
+addDateTestCase(TZ_ADJUST);
+  
+
+// 1900
+addDateTestCase(TIME_1900);
+addDateTestCase(TIME_1900 - TZ_ADJUST);
+
+
+// 2000
+addDateTestCase(TIME_2000);
+addDateTestCase(TIME_2000 - TZ_ADJUST);
+
+   
+// 29 Feb 2000
+addDateTestCase(UTC_29_FEB_2000);
+addDateTestCase(UTC_29_FEB_2000 - 1000);
+addDateTestCase(UTC_29_FEB_2000 - TZ_ADJUST);
+
+
+// Now
+addDateTestCase( TIME_NOW);
+addDateTestCase( TIME_NOW - TZ_ADJUST);
+
+
+// 2005
+addDateTestCase(UTC_1_JAN_2005);
+addDateTestCase(UTC_1_JAN_2005 - 1000);
+addDateTestCase(UTC_1_JAN_2005 - TZ_ADJUST);
+
+//-----------------------------------------------------------------------------------------------------
+test();
+//-----------------------------------------------------------------------------------------------------
+
+function addTestCase()
+{
+  new TestCase(
+    SECTION,
+    status,
+    expect,
+    actual);
+}
+
+function addDateTestCase(date_given_in_milliseconds)
+{
+  givenDate = new Date(date_given_in_milliseconds);
+  
+  status = '('  +  givenDate  +  ').toTimeString()';  
+  actual = givenDate.toTimeString();
+  expect = extractTimeString(givenDate);
+  addTestCase();
+}
+
+
+/*
+ * As of 2002-01-07, the format for JavaScript dates changed.
+ * See http://bugzilla.mozilla.org/show_bug.cgi?id=118266 (SpiderMonkey)
+ * See http://bugzilla.mozilla.org/show_bug.cgi?id=118636 (Rhino)
+ *
+ * WAS: Mon Jan 07 13:40:34 GMT-0800 (Pacific Standard Time) 2002
+ * NOW: Mon Jan 07 2002 13:40:34 GMT-0800 (Pacific Standard Time)
+ *
+ * Thus, use a regexp of the form /date.toDateString()(.*)$/
+ * to capture the TimeString into the first backreference -
+ */
+function extractTimeString(date)
+{
+  regexp = new RegExp(date.toDateString() + '(.*)' + '$');
+
+  try
+  {
+    hopeThisIsTimeString = date.toString().match(regexp)[1];
+  }
+  catch(e)
+  {
+    return cnERR;
+  }
+
+  // trim any leading or trailing spaces -
+  return trimL(trimR(hopeThisIsTimeString));
+}
+
+
+function trimL(s)
+{
+  if (!s) {return cnEmptyString;};
+  for (var i = 0; i!=s.length; i++) {if (s[i] != ' ') {break;}}
+  return s.substring(i);
+}
+
+
+function trimR(s)
+{
+  if (!s) {return cnEmptyString;};
+  for (var i = (s.length - 1); i!=-1; i--) {if (s[i] != ' ') {break;}}
+  return s.substring(0, i+1);
+}