1// Copyright 2009 the V8 project authors. All rights reserved. 2// Redistribution and use in source and binary forms, with or without 3// modification, are permitted provided that the following conditions are 4// met: 5// 6// * Redistributions of source code must retain the above copyright 7// notice, this list of conditions and the following disclaimer. 8// * Redistributions in binary form must reproduce the above 9// copyright notice, this list of conditions and the following 10// disclaimer in the documentation and/or other materials provided 11// with the distribution. 12// * Neither the name of Google Inc. nor the names of its 13// contributors may be used to endorse or promote products derived 14// from this software without specific prior written permission. 15// 16// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 19// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 20// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 21// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 22// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 26// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 28// Tests from http://blog.stevenlevithan.com/archives/npcg-javascript 29 30assertEquals(true, /(x)?\1y/.test("y")); 31assertEquals(["y", undefined], /(x)?\1y/.exec("y")); 32assertEquals(["y", undefined], /(x)?y/.exec("y")); 33assertEquals(["y", undefined], "y".match(/(x)?\1y/)); 34assertEquals(["y", undefined], "y".match(/(x)?y/)); 35assertEquals(["y"], "y".match(/(x)?\1y/g)); 36assertEquals(["", undefined, ""], "y".split(/(x)?\1y/)); 37assertEquals(["", undefined, ""], "y".split(/(x)?y/)); 38assertEquals(0, "y".search(/(x)?\1y/)); 39assertEquals("z", "y".replace(/(x)?\1y/, "z")); 40assertEquals("", "y".replace(/(x)?y/, "$1")); 41assertEquals("undefined", "y".replace(/(x)?\1y/, 42 function($0, $1){ 43 return String($1); 44 })); 45assertEquals("undefined", "y".replace(/(x)?y/, 46 function($0, $1){ 47 return String($1); 48 })); 49assertEquals("undefined", "y".replace(/(x)?y/, 50 function($0, $1){ 51 return $1; 52 })); 53 54// See https://bugzilla.mozilla.org/show_bug.cgi?id=476146 55assertEquals(["bbc", "b"], /^(b+|a){1,2}?bc/.exec("bbc")); 56assertEquals(["bbaa", "a", "", "a"], 57 /((\3|b)\2(a)){2,}/.exec("bbaababbabaaaaabbaaaabba")); 58 59