tests/mozilla/ecma_3/RegExp/regress-87231.js

   1 /*
   2 * The contents of this file are subject to the Netscape Public
   3 * License Version 1.1 (the "License"); you may not use this file
   4 * except in compliance with the License. You may obtain a copy of
   5 * the License at http://www.mozilla.org/NPL/
   6 *
   7 * Software distributed under the License is distributed on an "AS  IS"
   8 * basis, WITHOUT WARRANTY OF ANY KIND, either expressed
   9 * or implied. See the License for the specific language governing
  10 * rights and limitations under the License.
  11 *
  12 * The Original Code is mozilla.org code.
  13 *
  14 * The Initial Developer of the Original Code is Netscape
  15 * Communications Corporation.  Portions created by Netscape are
  16 * Copyright (C) 1998 Netscape Communications Corporation.
  17 * All Rights Reserved.
  18 *
  19 * Contributor(s): pschwartau@netscape.com
  20 * Date: 22 June 2001
  21 *
  22 * SUMMARY:  Regression test for Bugzilla bug 87231:
  23 * "Regular expression /(A)?(A.*)/ picks 'A' twice"
  24 *
  25 * See http://bugzilla.mozilla.org/show_bug.cgi?id=87231
  26 * Key case:
  27 *
  28 *            pattern = /^(A)?(A.*)$/;
  29 *            string = 'A';
  30 *            expectedmatch = Array('A', '', 'A');
  31 *
  32 *
  33 * We expect the 1st subexpression (A)? NOT to consume the single 'A'.
  34 * Recall that "?" means "match 0 or 1 times". Here, it should NOT do
  35 * greedy matching: it should match 0 times instead of 1. This allows
  36 * the 2nd subexpression to make the only match it can: the single 'A'.
  37 * Such "altruism" is the only way there can be a successful global match...
  38 */
  39 //-------------------------------------------------------------------------------------------------
  40 var i = 0;
  41 var bug = 87231;
  42 var cnEmptyString = '';
  43 var summary = 'Testing regular expression /(A)?(A.*)/';
  44 var status = '';
  45 var statusmessages = new Array();
  46 var pattern = '';
  47 var patterns = new Array();
  48 var string = '';
  49 var strings = new Array();
  50 var actualmatch = '';
  51 var actualmatches = new Array();
  52 var expectedmatch = '';
  53 var expectedmatches = new Array();
  54
  55
  56 pattern = /^(A)?(A.*)$/;
  57     status = inSection(1);
  58     string = 'AAA';
  59     actualmatch = string.match(pattern);
  60     expectedmatch = Array('AAA', 'A', 'AA');
  61     addThis();
  62
  63     status = inSection(2);
  64     string = 'AA';
  65     actualmatch = string.match(pattern);
  66     expectedmatch = Array('AA', 'A', 'A');
  67     addThis();
  68
  69     status = inSection(3);
  70     string = 'A';
  71     actualmatch = string.match(pattern);
  72     expectedmatch = Array('A', undefined, 'A'); // 'altruistic' case: see above
  73     addThis();
  74
  75
  76 pattern = /(A)?(A.*)/;
  77 var strL = 'zxcasd;fl\\\  ^';
  78 var strR = 'aaAAaaaf;lrlrzs';
  79
  80     status = inSection(4);
  81     string =  strL + 'AAA' + strR;
  82     actualmatch = string.match(pattern);
  83     expectedmatch = Array('AAA' + strR, 'A', 'AA' + strR);
  84     addThis();
  85
  86     status = inSection(5);
  87     string =  strL + 'AA' + strR;
  88     actualmatch = string.match(pattern);
  89     expectedmatch = Array('AA' + strR, 'A', 'A' + strR);
  90     addThis();
  91
  92     status = inSection(6);
  93     string =  strL + 'A' + strR;
  94     actualmatch = string.match(pattern);
  95     expectedmatch = Array('A' + strR, undefined, 'A' + strR); // 'altruistic' case: see above
  96     addThis();
  97
  98
  99
 100 //-------------------------------------------------------------------------------------------------
 101 test();
 102 //-------------------------------------------------------------------------------------------------
 103
 104
 105
 106 function addThis()
 107 {
 108   statusmessages[i] = status;
 109   patterns[i] = pattern;
 110   strings[i] = string;
 111   actualmatches[i] = actualmatch;
 112   expectedmatches[i] = expectedmatch;
 113   i++;
 114 }
 115
 116
 117 function test()
 118 {
 119   enterFunc ('test');
 120   printBugNumber (bug);
 121   printStatus (summary);
 122   testRegExp(statusmessages, patterns, strings, actualmatches, expectedmatches);
 123   exitFunc ('test');
 124 }