/*

 * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

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/**

 * JDK-8137240: Negative lookahead in RegEx breaks backreference

 *

 * @test

 * @run

 */

Assert.assertEquals('aa'.replace(/(a)(?!b)\1/gm, 'c'), 'c');

var result = 'aa'.match(/(a)(?!b)\1/);

Assert.assertTrue(result.length === 2);

Assert.assertTrue(result[0] === 'aa');

Assert.assertTrue(result[1] === 'a');

result = 'aa'.match(/(a)(?!(b))\2(a)/);

Assert.assertTrue(result.length === 4);

Assert.assertTrue(result[0] === 'aa');

Assert.assertTrue(result[1] === 'a');

Assert.assertTrue(result[2] === undefined);

Assert.assertTrue(result[3] === 'a');