1// Copyright 2008 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// See http://code.google.com/p/v8/issues/detail?id=176 29 30assertArrayEquals(["f", undefined], 31 "foo".match(/(?:(?=(f)o))?f/), 32 "zero length match in (?:) with capture in lookahead"); 33assertArrayEquals(["f", undefined], 34 "foo".match(/(?=(f)o)?f/), 35 "zero length match in (?=) with capture in lookahead"); 36assertArrayEquals(["fo", "f"], 37 "foo".match(/(?:(?=(f)o)f)?o/), 38 "non-zero length match with capture in lookahead"); 39assertArrayEquals(["fo", "f"], 40 "foo".match(/(?:(?=(f)o)f?)?o/), 41 "non-zero length match with greedy ? in (?:)"); 42assertArrayEquals(["fo", "f"], 43 "foo".match(/(?:(?=(f)o)f??)?o/), 44 "non-zero length match with non-greedy ? in (?:), o forces backtrack"); 45assertArrayEquals(["fo", "f"], 46 "foo".match(/(?:(?=(f)o)f??)?./), 47 "non-zero length match with non-greedy ? in (?:), zero length match causes backtrack"); 48assertArrayEquals(["f", undefined], 49 "foo".match(/(?:(?=(f)o)fx)?./), 50 "x causes backtrack inside (?:)"); 51