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diff --git a/js/src/tests/ecma_3/extensions/shell.js b/js/src/tests/ecma_3/extensions/shell.js
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+++ b/js/src/tests/ecma_3/extensions/shell.js
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+/* -*- tab-width: 2; 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/. */
+
+/*
+ * Date: 07 February 2001
+ *
+ * Functionality common to RegExp testing -
+ */
+//-----------------------------------------------------------------------------
+
+
+var MSG_PATTERN = '\nregexp = ';
+var MSG_STRING = '\nstring = ';
+var MSG_EXPECT = '\nExpect: ';
+var MSG_ACTUAL = '\nActual: ';
+var ERR_LENGTH = '\nERROR !!! match arrays have different lengths:';
+var ERR_MATCH = '\nERROR !!! regexp failed to give expected match array:';
+var ERR_NO_MATCH = '\nERROR !!! regexp FAILED to match anything !!!';
+var ERR_UNEXP_MATCH = '\nERROR !!! regexp MATCHED when we expected it to fail !!!';
+var CHAR_LBRACKET = '[';
+var CHAR_RBRACKET = ']';
+var CHAR_QT_DBL = '"';
+var CHAR_QT = "'";
+var CHAR_NL = '\n';
+var CHAR_COMMA = ',';
+var CHAR_SPACE = ' ';
+var TYPE_STRING = typeof 'abc';
+
+
+
+function testRegExp(statuses, patterns, strings, actualmatches, expectedmatches)
+{
+ var status = '';
+ var pattern = new RegExp();
+ var string = '';
+ var actualmatch = new Array();
+ var expectedmatch = new Array();
+ var state = '';
+ var lActual = -1;
+ var lExpect = -1;
+
+
+ for (var i=0; i != patterns.length; i++)
+ {
+ status = statuses[i];
+ pattern = patterns[i];
+ string = strings[i];
+ actualmatch=actualmatches[i];
+ expectedmatch=expectedmatches[i];
+ state = getState(status, pattern, string);
+
+ description = status;
+
+ if(actualmatch)
+ {
+ actual = formatArray(actualmatch);
+ if(expectedmatch)
+ {
+ // expectedmatch and actualmatch are arrays -
+ lExpect = expectedmatch.length;
+ lActual = actualmatch.length;
+
+ var expected = formatArray(expectedmatch);
+
+ if (lActual != lExpect)
+ {
+ reportCompare(lExpect, lActual,
+ state + ERR_LENGTH +
+ MSG_EXPECT + expected +
+ MSG_ACTUAL + actual +
+ CHAR_NL
+ );
+ continue;
+ }
+
+ // OK, the arrays have same length -
+ if (expected != actual)
+ {
+ reportCompare(expected, actual,
+ state + ERR_MATCH +
+ MSG_EXPECT + expected +
+ MSG_ACTUAL + actual +
+ CHAR_NL
+ );
+ }
+ else
+ {
+ reportCompare(expected, actual, state)
+ }
+
+ }
+ else //expectedmatch is null - that is, we did not expect a match -
+ {
+ expected = expectedmatch;
+ reportCompare(expected, actual,
+ state + ERR_UNEXP_MATCH +
+ MSG_EXPECT + expectedmatch +
+ MSG_ACTUAL + actual +
+ CHAR_NL
+ );
+ }
+
+ }
+ else // actualmatch is null
+ {
+ if (expectedmatch)
+ {
+ actual = actualmatch;
+ reportCompare(expected, actual,
+ state + ERR_NO_MATCH +
+ MSG_EXPECT + expectedmatch +
+ MSG_ACTUAL + actualmatch +
+ CHAR_NL
+ );
+ }
+ else // we did not expect a match
+ {
+ // Being ultra-cautious. Presumably expectedmatch===actualmatch===null
+ expected = expectedmatch;
+ actual = actualmatch;
+ reportCompare (expectedmatch, actualmatch, state);
+ }
+ }
+ }
+}
+
+
+function getState(status, pattern, string)
+{
+ /*
+ * Escape \n's, etc. to make them LITERAL in the presentation string.
+ * We don't have to worry about this in |pattern|; such escaping is
+ * done automatically by pattern.toString(), invoked implicitly below.
+ *
+ * One would like to simply do: string = string.replace(/(\s)/g, '\$1').
+ * However, the backreference $1 is not a literal string value,
+ * so this method doesn't work.
+ *
+ * Also tried string = string.replace(/(\s)/g, escape('$1'));
+ * but this just inserts the escape of the literal '$1', i.e. '%241'.
+ */
+ string = string.replace(/\n/g, '\\n');
+ string = string.replace(/\r/g, '\\r');
+ string = string.replace(/\t/g, '\\t');
+ string = string.replace(/\v/g, '\\v');
+ string = string.replace(/\f/g, '\\f');
+
+ return (status + MSG_PATTERN + pattern + MSG_STRING + singleQuote(string));
+}
+
+
+/*
+ * If available, arr.toSource() gives more detail than arr.toString()
+ *
+ * var arr = Array(1,2,'3');
+ *
+ * arr.toSource()
+ * [1, 2, "3"]
+ *
+ * arr.toString()
+ * 1,2,3
+ *
+ * But toSource() doesn't exist in Rhino, so use our own imitation, below -
+ *
+ */
+function formatArray(arr)
+{
+ try
+ {
+ return arr.toSource();
+ }
+ catch(e)
+ {
+ return toSource(arr);
+ }
+}
+
+
+/*
+ * Imitate SpiderMonkey's arr.toSource() method:
+ *
+ * a) Double-quote each array element that is of string type
+ * b) Represent |undefined| and |null| by empty strings
+ * c) Delimit elements by a comma + single space
+ * d) Do not add delimiter at the end UNLESS the last element is |undefined|
+ * e) Add square brackets to the beginning and end of the string
+ */
+function toSource(arr)
+{
+ var delim = CHAR_COMMA + CHAR_SPACE;
+ var elt = '';
+ var ret = '';
+ var len = arr.length;
+
+ for (i=0; i<len; i++)
+ {
+ elt = arr[i];
+
+ switch(true)
+ {
+ case (typeof elt === TYPE_STRING) :
+ ret += doubleQuote(elt);
+ break;
+
+ case (elt === undefined || elt === null) :
+ break; // add nothing but the delimiter, below -
+
+ default:
+ ret += elt.toString();
+ }
+
+ if ((i < len-1) || (elt === undefined))
+ ret += delim;
+ }
+
+ return CHAR_LBRACKET + ret + CHAR_RBRACKET;
+}
+
+
+function doubleQuote(text)
+{
+ return CHAR_QT_DBL + text + CHAR_QT_DBL;
+}
+
+
+function singleQuote(text)
+{
+ return CHAR_QT + text + CHAR_QT;
+}
+