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40 * Date: 22 October 2001
42 * SUMMARY: Regression test for Bugzilla bug 105972:
43 * "/^.*?$/ will not match anything"
45 * See http://bugzilla.mozilla.org/show_bug.cgi?id=105972
47 //-----------------------------------------------------------------------------
48 var gTestfile = 'regress-105972.js';
50 var BUGNUMBER = 105972;
51 var summary = 'Regression test for Bugzilla bug 105972';
52 var cnEmptyString = '';
54 var statusmessages = new Array();
56 var patterns = new Array();
58 var strings = new Array();
60 var actualmatches = new Array();
61 var expectedmatch = '';
62 var expectedmatches = new Array();
66 * The bug: this match was coming up null in Rhino and SpiderMonkey.
67 * It should match the whole string. The reason:
69 * The * operator is greedy, but *? is non-greedy: it will stop
70 * at the simplest match it can find. But the pattern here asks us
71 * to match till the end of the string. So the simplest match must
72 * go all the way out to the end, and *? has no choice but to do it.
74 status = inSection(1);
76 string = 'Hello World';
77 actualmatch = string.match(pattern);
78 expectedmatch = Array(string);
83 * Leave off the '$' condition - here we expect the empty string.
84 * Unlike the above pattern, we don't have to match till the end of
85 * the string, so the non-greedy operator *? doesn't try to...
87 status = inSection(2);
89 string = 'Hello World';
90 actualmatch = string.match(pattern);
91 expectedmatch = Array(cnEmptyString);
96 * Try '$' combined with an 'or' operator.
98 * The operator *? will consume the string from left to right,
99 * attempting to satisfy the condition (:|$). When it hits ':',
100 * the match will stop because the operator *? is non-greedy.
102 * The submatch $1 = (:|$) will contain the ':'
104 status = inSection(3);
105 pattern = /^.*?(:|$)/;
106 string = 'Hello: World';
107 actualmatch = string.match(pattern);
108 expectedmatch = Array('Hello:', ':');
113 * Again, '$' combined with an 'or' operator.
115 * The operator * will consume the string from left to right,
116 * attempting to satisfy the condition (:|$). When it hits ':',
117 * the match will not stop since * is greedy. The match will
118 * continue until it hits $, the end-of-string boundary.
120 * The submatch $1 = (:|$) will contain the empty string
121 * conceived to exist at the end-of-string boundary.
123 status = inSection(4);
124 pattern = /^.*(:|$)/;
125 string = 'Hello: World';
126 actualmatch = string.match(pattern);
127 expectedmatch = Array(string, cnEmptyString);
133 //-----------------------------------------------------------------------------
135 //-----------------------------------------------------------------------------
141 statusmessages[i] = status;
142 patterns[i] = pattern;
144 actualmatches[i] = actualmatch;
145 expectedmatches[i] = expectedmatch;
153 printBugNumber(BUGNUMBER);
154 printStatus (summary);
155 testRegExp(statusmessages, patterns, strings, actualmatches, expectedmatches);