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| 1 description("This page tests handling of parenthetical assertions."); | |
| 2 | |
| 3 var regex1 = /(x)(?=\1)x/; | |
| 4 shouldBe("regex1.exec('xx')", "['xx','x']"); | |
| 5 | |
| 6 var regex2 = /(.*?)a(?!(a+)b\2c)\2(.*)/; | |
| 7 shouldBe("regex2.exec('baaabaac')", "['baaabaac','ba',undefined,'abaac']"); | |
| 8 | |
| 9 var regex3 = /(?=(a+?))(\1ab)/; | |
| 10 shouldBe("regex3.exec('aaab')", "['aab','a','aab']"); | |
| 11 | |
| 12 var regex4 = /(?=(a+?))(\1ab)/; | |
| 13 shouldBe("regex4.exec('aaab')", "['aab','a','aab']"); | |
| 14 | |
| 15 var regex5 = /^P([1-6])(?=\1)([1-6])$/; | |
| 16 shouldBe("regex5.exec('P11')", "['P11','1','1']"); | |
| 17 | |
| 18 var regex6 = /(([a-c])b*?\2)*/; | |
| 19 shouldBe("regex6.exec('ababbbcbc')", "['ababb','bb','b']"); | |
| 20 | |
| 21 var regex7 = /(x)(?=x)x/; | |
| 22 shouldBe("regex7.exec('xx')", "['xx','x']"); | |
| 23 | |
| 24 var regex8 = /(x)(\1)/; | |
| 25 shouldBe("regex8.exec('xx')", "['xx','x','x']"); | |
| 26 | |
| 27 var regex9 = /(x)(?=\1)x/; | |
| 28 shouldBeNull("regex9.exec('xy')"); | |
| 29 | |
| 30 var regex10 = /(x)(?=x)x/; | |
| 31 shouldBeNull("regex10.exec('xy')"); | |
| 32 | |
| 33 var regex11 = /(x)(\1)/; | |
| 34 shouldBeNull("regex11.exec('xy')"); | |
| 35 | |
| 36 var regex12 = /(x)(?=\1)x/; | |
| 37 shouldBeNull("regex12.exec('x')"); | |
| 38 shouldBe("regex12.exec('xx')", "['xx','x']"); | |
| 39 shouldBe("regex12.exec('xxy')", "['xx','x']"); | |
| 40 | |
| 41 var regex13 = /(x)zzz(?=\1)x/; | |
| 42 shouldBe("regex13.exec('xzzzx')", "['xzzzx','x']"); | |
| 43 shouldBe("regex13.exec('xzzzxy')", "['xzzzx','x']"); | |
| 44 | |
| 45 var regex14 = /(a)\1(?=(b*c))bc/; | |
| 46 shouldBe("regex14.exec('aabc')", "['aabc','a','bc']"); | |
| 47 shouldBe("regex14.exec('aabcx')", "['aabc','a','bc']"); | |
| 48 | |
| 49 var regex15 = /(a)a(?=(b*c))bc/; | |
| 50 shouldBe("regex15.exec('aabc')", "['aabc','a','bc']"); | |
| 51 shouldBe("regex15.exec('aabcx')", "['aabc','a','bc']"); | |
| 52 | |
| 53 var regex16 = /a(?=(b*c))bc/; | |
| 54 shouldBeNull("regex16.exec('ab')"); | |
| 55 shouldBe("regex16.exec('abc')", "['abc','bc']"); | |
| 56 | |
| 57 var regex17 = /(?=((?:ab)*))a/; | |
| 58 shouldBe("regex17.exec('ab')", "['a','ab']"); | |
| 59 shouldBe("regex17.exec('abc')", "['a','ab']"); | |
| 60 | |
| 61 var regex18 = /(?=((?:xx)*))x/; | |
| 62 shouldBe("regex18.exec('x')", "['x','']"); | |
| 63 shouldBe("regex18.exec('xx')", "['x','xx']"); | |
| 64 shouldBe("regex18.exec('xxx')", "['x','xx']"); | |
| 65 | |
| 66 var regex19 = /(?=((xx)*))x/; | |
| 67 shouldBe("regex19.exec('x')", "['x','',undefined]"); | |
| 68 shouldBe("regex19.exec('xx')", "['x','xx','xx']"); | |
| 69 shouldBe("regex19.exec('xxx')", "['x','xx','xx']"); | |
| 70 | |
| 71 var regex20 = /(?=(xx))+x/; | |
| 72 shouldBeNull("regex20.exec('x')"); | |
| 73 shouldBe("regex20.exec('xx')", "['x','xx']"); | |
| 74 shouldBe("regex20.exec('xxx')", "['x','xx']"); | |
| 75 | |
| 76 var regex21 = /(?=a+b)aab/; | |
| 77 shouldBe("regex21.exec('aab')", "['aab']"); | |
| 78 | |
| 79 var regex22 = /(?!(u|m{0,}g+)u{1,}|2{2,}!1%n|(?!K|(?=y)|(?=ip))+?)(?=(?=(((?:7))
*?)*?))p/m; | |
| 80 shouldBe("regex22.exec('55up')", "null"); | |
| 81 | |
| 82 var regex23 = /(?=(a)b|c?)()*d/; | |
| 83 shouldBe("regex23.exec('ax')", "null"); | |
| 84 | |
| 85 var regex24 = /(?=a|b?)c/; | |
| 86 shouldBe("regex24.exec('x')", "null"); | |
| 87 | |
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