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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/. */
/*
* Date: 22 June 2001
*
* SUMMARY: Regression test for Bugzilla bug 87231:
* "Regular expression /(A)?(A.*)/ picks 'A' twice"
*
* See http://bugzilla.mozilla.org/show_bug.cgi?id=87231
* Key case:
*
* pattern = /^(A)?(A.*)$/;
* string = 'A';
* expectedmatch = Array('A', '', 'A');
*
*
* We expect the 1st subexpression (A)? NOT to consume the single 'A'.
* Recall that "?" means "match 0 or 1 times". Here, it should NOT do
* greedy matching: it should match 0 times instead of 1. This allows
* the 2nd subexpression to make the only match it can: the single 'A'.
* Such "altruism" is the only way there can be a successful global match...
*/
//-----------------------------------------------------------------------------
var i = 0;
var BUGNUMBER = 87231;
var cnEmptyString = '';
var summary = 'Testing regular expression /(A)?(A.*)/';
var status = '';
var statusmessages = new Array();
var pattern = '';
var patterns = new Array();
var string = '';
var strings = new Array();
var actualmatch = '';
var actualmatches = new Array();
var expectedmatch = '';
var expectedmatches = new Array();
pattern = /^(A)?(A.*)$/;
status = inSection(1);
string = 'AAA';
actualmatch = string.match(pattern);
expectedmatch = Array('AAA', 'A', 'AA');
addThis();
status = inSection(2);
string = 'AA';
actualmatch = string.match(pattern);
expectedmatch = Array('AA', 'A', 'A');
addThis();
status = inSection(3);
string = 'A';
actualmatch = string.match(pattern);
expectedmatch = Array('A', undefined, 'A'); // 'altruistic' case: see above
addThis();
pattern = /(A)?(A.*)/;
var strL = 'zxcasd;fl\\\ ^';
var strR = 'aaAAaaaf;lrlrzs';
status = inSection(4);
string = strL + 'AAA' + strR;
actualmatch = string.match(pattern);
expectedmatch = Array('AAA' + strR, 'A', 'AA' + strR);
addThis();
status = inSection(5);
string = strL + 'AA' + strR;
actualmatch = string.match(pattern);
expectedmatch = Array('AA' + strR, 'A', 'A' + strR);
addThis();
status = inSection(6);
string = strL + 'A' + strR;
actualmatch = string.match(pattern);
expectedmatch = Array('A' + strR, undefined, 'A' + strR); // 'altruistic' case: see above
addThis();
//-------------------------------------------------------------------------------------------------
test();
//-------------------------------------------------------------------------------------------------
function addThis()
{
statusmessages[i] = status;
patterns[i] = pattern;
strings[i] = string;
actualmatches[i] = actualmatch;
expectedmatches[i] = expectedmatch;
i++;
}
function test()
{
enterFunc ('test');
printBugNumber(BUGNUMBER);
printStatus (summary);
testRegExp(statusmessages, patterns, strings, actualmatches, expectedmatches);
exitFunc ('test');
}
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