v8/test/mjsunit/regexp-capture.js

// Copyright 2009 the V8 project authors. All rights reserved.
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// Tests from http://blog.stevenlevithan.com/archives/npcg-javascript

assertEquals(true, /(x)?\1y/.test("y"));
assertEquals(["y", undefined], /(x)?\1y/.exec("y"));
assertEquals(["y", undefined], /(x)?y/.exec("y"));
assertEquals(["y", undefined], "y".match(/(x)?\1y/));
assertEquals(["y", undefined], "y".match(/(x)?y/));
assertEquals(["y"], "y".match(/(x)?\1y/g));
assertEquals(["", undefined, ""], "y".split(/(x)?\1y/));
assertEquals(["", undefined, ""], "y".split(/(x)?y/));
assertEquals(0, "y".search(/(x)?\1y/));
assertEquals("z", "y".replace(/(x)?\1y/, "z"));
assertEquals("", "y".replace(/(x)?y/, "$1"));
assertEquals("undefined", "y".replace(/(x)?\1y/,
    function($0, $1){
        return String($1);
    }));
assertEquals("undefined", "y".replace(/(x)?y/,
    function($0, $1){
        return String($1);
    }));
assertEquals("undefined", "y".replace(/(x)?y/,
    function($0, $1){
        return $1;
    }));

// See https://bugzilla.mozilla.org/show_bug.cgi?id=476146
assertEquals(["bbc", "b"], /^(b+|a){1,2}?bc/.exec("bbc"));
assertEquals(["bbaa", "a", "", "a"],
             /((\3|b)\2(a)){2,}/.exec("bbaababbabaaaaabbaaaabba"));

// From crbug.com/128821 - don't hang:
"".match(/((a|i|A|I|u|o|U|O)(s|c|b|c|d|f|g|h|j|k|l|m|n|p|q|r|s|t|v|w|x|y|z|B|C|D|F|G|H|J|K|L|M|N|P|Q|R|S|T|V|W|X|Y|Z)*) de\/da([.,!?\s]|$)/);