| /* |
| * Copyright (c) 2010, 2013, 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. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| /** |
| * JDK-8023368: Instance __proto__ property should exist and be writable. |
| * |
| * @test |
| * @run |
| */ |
| |
| // check Object.setPrototypeOf extension rather than using __proto__ |
| |
| // function to force same callsites |
| function check(obj) { |
| print(obj.func()); |
| print(obj.x); |
| print(obj.toString()); |
| } |
| |
| function Func() { |
| } |
| |
| Func.prototype.func = function() { |
| return "Func.prototype.func"; |
| } |
| |
| Func.prototype.x = "hello"; |
| |
| var obj = new Func(); |
| var obj2 = Object.create(obj); |
| |
| // check direct and indirect __proto__ change |
| check(obj); |
| check(obj2); |
| Object.setPrototypeOf(obj, { |
| func: function() { |
| return "obj.__proto__.func @ " + __LINE__; |
| }, |
| x: 344 |
| }); |
| |
| check(obj); |
| check(obj2); |
| |
| // check indirect (1 and 2 levels) __proto__ function change |
| Object.setPrototypeOf(Object.getPrototypeOf(obj), { |
| toString: function() { |
| return "new object.toString"; |
| } |
| }); |
| |
| check(obj); |
| check(obj2); |