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19 * Contributor(s): pschwartau@netscape.com
22 * SUMMARY: Regression test for Bugzilla bug 87231:
23 * "Regular expression /(A)?(A.*)/ picks 'A' twice"
25 * See http://bugzilla.mozilla.org/show_bug.cgi?id=87231
28 * pattern = /^(A)?(A.*)$/;
30 * expectedmatch = Array('A', '', 'A');
33 * We expect the 1st subexpression (A)? NOT to consume the single 'A'.
34 * Recall that "?" means "match 0 or 1 times". Here, it should NOT do
35 * greedy matching: it should match 0 times instead of 1. This allows
36 * the 2nd subexpression to make the only match it can: the single 'A'.
37 * Such "altruism" is the only way there can be a successful global match...
39 //-------------------------------------------------------------------------------------------------
42 var cnEmptyString = '';
43 var summary = 'Testing regular expression /(A)?(A.*)/';
45 var statusmessages = new Array();
47 var patterns = new Array();
49 var strings = new Array();
51 var actualmatches = new Array();
52 var expectedmatch = '';
53 var expectedmatches = new Array();
56 pattern = /^(A)?(A.*)$/;
57 status = inSection(1);
59 actualmatch = string.match(pattern);
60 expectedmatch = Array('AAA', 'A', 'AA');
63 status = inSection(2);
65 actualmatch = string.match(pattern);
66 expectedmatch = Array('AA', 'A', 'A');
69 status = inSection(3);
71 actualmatch = string.match(pattern);
72 expectedmatch = Array('A', undefined, 'A'); // 'altruistic' case: see above
76 pattern = /(A)?(A.*)/;
77 var strL = 'zxcasd;fl\\\ ^';
78 var strR = 'aaAAaaaf;lrlrzs';
80 status = inSection(4);
81 string = strL + 'AAA' + strR;
82 actualmatch = string.match(pattern);
83 expectedmatch = Array('AAA' + strR, 'A', 'AA' + strR);
86 status = inSection(5);
87 string = strL + 'AA' + strR;
88 actualmatch = string.match(pattern);
89 expectedmatch = Array('AA' + strR, 'A', 'A' + strR);
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
100 //-------------------------------------------------------------------------------------------------
102 //-------------------------------------------------------------------------------------------------
108 statusmessages[i] = status;
109 patterns[i] = pattern;
111 actualmatches[i] = actualmatch;
112 expectedmatches[i] = expectedmatch;
120 printBugNumber (bug);
121 printStatus (summary);
122 testRegExp(statusmessages, patterns, strings, actualmatches, expectedmatches);