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     23 
     24 description(
     25 "This page tests the regex examples from the ECMA-262 specification."
     26 );
     27 
     28 var regex01 = /a|ab/;
     29 shouldBe('regex01.exec("abc")', '["a"]');
     30 
     31 var regex02 = /((a)|(ab))((c)|(bc))/;
     32 shouldBe('regex02.exec("abc")', '["abc", "a", "a", undefined, "bc", undefined, "bc"]');
     33 
     34 var regex03 = /a[a-z]{2,4}/;
     35 shouldBe('regex03.exec("abcdefghi")', '["abcde"]');
     36 
     37 var regex04 = /a[a-z]{2,4}?/;
     38 shouldBe('regex04.exec("abcdefghi")', '["abc"]');
     39 
     40 var regex05 = /(aa|aabaac|ba|b|c)*/;
     41 shouldBe('regex05.exec("aabaac")', '["aaba", "ba"]');
     42 
     43 var regex06 = /^(a+)\1*,\1+$/;
     44 shouldBe('"aaaaaaaaaa,aaaaaaaaaaaaaaa".replace(regex06,"$1")', '"aaaaa"');
     45 
     46 var regex07 = /(z)((a+)?(b+)?(c))*/;
     47 shouldBe('regex07.exec("zaacbbbcac")', '["zaacbbbcac", "z", "ac", "a", undefined, "c"]');
     48 
     49 var regex08 = /(a*)*/;
     50 shouldBe('regex08.exec("b")', '["", undefined]');
     51 
     52 var regex09 = /(a*)b\1+/;
     53 shouldBe('regex09.exec("baaaac")', '["b", ""]');
     54 
     55 var regex10 = /(?=(a+))/;
     56 shouldBe('regex10.exec("baaabac")', '["", "aaa"]');
     57 
     58 var regex11 = /(?=(a+))a*b\1/;
     59 shouldBe('regex11.exec("baaabac")', '["aba", "a"]');
     60 
     61 var regex12 = /(.*?)a(?!(a+)b\2c)\2(.*)/;
     62 shouldBe('regex12.exec("baaabaac")', '["baaabaac", "ba", undefined, "abaac"]');
     63