1// Copyright 2013 the V8 project authors. All rights reserved. 2// Copyright (C) 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved. 3// 4// Redistribution and use in source and binary forms, with or without 5// modification, are permitted provided that the following conditions 6// are met: 7// 1. Redistributions of source code must retain the above copyright 8// notice, this list of conditions and the following disclaimer. 9// 2. Redistributions in binary form must reproduce the above copyright 10// notice, this list of conditions and the following disclaimer in the 11// documentation and/or other materials provided with the distribution. 12// 13// THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND ANY 14// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 15// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 16// DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY 17// DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 18// (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 19// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON 20// ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 21// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 22// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 23 24description( 25'Test for behavior of non-capturing groups, as described in <a href="http://blog.stevenlevithan.com/archives/npcg-javascript">' + 26'a blog post by Steven Levithan</a> and <a href="http://bugs.webkit.org/show_bug.cgi?id=14931">bug 14931</a>.' 27); 28 29shouldBe('/(x)?\\1y/.test("y")', 'true'); 30shouldBe('/(x)?\\1y/.exec("y")', '["y", undefined]'); 31shouldBe('/(x)?y/.exec("y")', '["y", undefined]'); 32shouldBe('"y".match(/(x)?\\1y/)', '["y", undefined]'); 33shouldBe('"y".match(/(x)?y/)', '["y", undefined]'); 34shouldBe('"y".match(/(x)?\\1y/g)', '["y"]'); 35shouldBe('"y".split(/(x)?\\1y/)', '["", undefined, ""]'); 36shouldBe('"y".split(/(x)?y/)', '["", undefined, ""]'); 37shouldBe('"y".search(/(x)?\\1y/)', '0'); 38shouldBe('"y".replace(/(x)?\\1y/, "z")', '"z"'); 39shouldBe('"y".replace(/(x)?y/, "$1")', '""'); 40shouldBe('"y".replace(/(x)?\\1y/, function($0, $1){ return String($1); })', '"undefined"'); 41shouldBe('"y".replace(/(x)?y/, function($0, $1){ return String($1); })', '"undefined"'); 42shouldBe('"y".replace(/(x)?y/, function($0, $1){ return $1; })', '"undefined"'); 43