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38 * Date: 26 November 2000
41 *SUMMARY: Passing a RegExp object to a RegExp() constructor.
42 *This test arose from Bugzilla bug 61266. The ECMA3 section is:
44 * 15.10.4.1 new RegExp(pattern, flags)
46 * If pattern is an object R whose [[Class]] property is "RegExp" and
47 * flags is undefined, then let P be the pattern used to construct R
48 * and let F be the flags used to construct R. If pattern is an object R
49 * whose [[Class]] property is "RegExp" and flags is not undefined,
50 * then throw a TypeError exception. Otherwise, let P be the empty string
51 * if pattern is undefined and ToString(pattern) otherwise, and let F be
52 * the empty string if flags is undefined and ToString(flags) otherwise.
55 *The current test will check the first scenario outlined above:
57 * "pattern" is itself a RegExp object R
58 * "flags" is undefined
60 * We check that a new RegExp object obj2 defined from these parameters
61 * is morally the same as the original RegExp object obj1. Of course, they
62 * can't be equal as objects - so we check their enumerable properties...
64 * In this test, the initial RegExp object obj1 will include a flag. This test is
65 * identical to test 15.10.4.1-3.js, except that here we use this syntax:
67 * obj2 = new RegExp(obj1, undefined);
71 * obj2 = new RegExp(obj1);
73 //-------------------------------------------------------------------------------------------------
75 var summary = 'Passing a RegExp object to a RegExp() constructor';
76 var statprefix = 'Applying RegExp() twice to pattern ';
77 var statmiddle = ' and flag ';
78 var statsuffix = '; testing property ';
79 var singlequote = "'";
80 var i = -1; var j = -1; var s = '';
81 var obj1 = {}; var obj2 = {};
82 var status = ''; var actual = ''; var expect = ''; var msg = '';
83 var patterns = new Array();
84 var flags = new Array();
87 // various regular expressions to try -
90 patterns[2] = '(.*)(3-1)\s\w';
91 patterns[3] = '(.*)(...)\\s\\w';
92 patterns[4] = '[^A-Za-z0-9_]';
93 patterns[5] = '[^\f\n\r\t\v](123.5)([4 - 8]$)';
95 // various flags to try -
103 //-------------------------------------------------------------------------------------------------
105 //-------------------------------------------------------------------------------------------------
111 printBugNumber (bug);
112 printStatus (summary);
121 status = getStatus(s, f);
122 obj1 = new RegExp(s, f);
123 obj2 = new RegExp(obj1, undefined); // see introduction to bug
127 msg = status + quote(prop);
130 reportCompare (expect, actual, msg);
139 function getStatus(regexp, flag)
141 return (statprefix + quote(regexp) + statmiddle + flag + statsuffix);
147 return (singlequote + text + singlequote);