nonextensible_proto_assign.js revision 512:b7c04b3b01a7 
1/*
2 * Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 */
23
24/**
25 * JDK-8023368: Instance __proto__ property should exist and be writable.
26 *
27 * @test
28 * @run
29 */
30
31load("nashorn:mozilla_compat.js")
32
33// check that we cannot assign to __proto__ of a non-extensible object
34try {
35    var obj = {}
36    Object.preventExtensions(obj);
37    obj.__proto__ = { };
38    fail("Should have thrown TypeError");
39} catch (e) {
40    if (! (e instanceof TypeError)) {
41        fail("Expected TypeError, got " + e);
42    }
43    print(e);
44}
45