/*+
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 * Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved.+
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.+
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 *+
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 * This code is free software; you can redistribute it and/or modify it+
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 * under the terms of the GNU General Public License version 2 only, as+
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 * published by the Free Software Foundation.+
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 *+
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 * This code is distributed in the hope that it will be useful, but WITHOUT+
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or+
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License+
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 * version 2 for more details (a copy is included in the LICENSE file that+
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 * accompanied this code).+
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 *+
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 * You should have received a copy of the GNU General Public License version+
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 * 2 along with this work; if not, write to the Free Software Foundation,+
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 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.+
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 *+
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 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA+
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 * or visit www.oracle.com if you need additional information or have any+
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 * questions.+
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 */+
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+
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/**+
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 * JDK-8023368: Instance __proto__ property should exist and be writable.+
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 *+
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 * @test+
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 * @run+
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 */+
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+
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// check Object.setPrototypeOf extension rather than using __proto__+
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+
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// function to force same callsites+
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function check(obj) {+
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    print(obj.func());+
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    print(obj.x);+
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    print(obj.toString());+
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}+
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+
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function Func() {+
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}+
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+
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Func.prototype.func = function() {+
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    return "Func.prototype.func";+
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}+
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+
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Func.prototype.x = "hello";+
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+
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var obj = new Func();+
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var obj2 = Object.create(obj);+
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+
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// check direct and indirect __proto__ change+
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check(obj);+
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check(obj2);+
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Object.setPrototypeOf(obj, {+
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   func: function() {+
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        return "obj.__proto__.func @ " + __LINE__;+
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   },+
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   x: 344+
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});+
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+
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check(obj);+
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check(obj2);+
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+
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// check indirect (1 and 2 levels) __proto__ function change+
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Object.setPrototypeOf(Object.getPrototypeOf(obj), {+
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    toString: function() {+
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        return "new object.toString";+
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    }+
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});+
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+
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check(obj);+
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check(obj2);+
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