sealfreeze.js revision 877:cf4d2252d444 
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 * Basic checks for Object.seal and Object.freeze.
26 *
27 * @test
28 * @run
29 */
30
31var obj = { num: Math.E };
32
33print("sealed? " + Object.isSealed(obj));
34print("frozen? " + Object.isFrozen(obj));
35
36Object.seal(obj);
37print("sealed? " + Object.isSealed(obj));
38
39// delete should fail - because we have sealed
40print("deleted num? " + (delete obj.num));
41print("num = " + obj.num);
42
43// assignment should succeed
44print("assign PI to num");
45obj.num = Math.PI;
46print("num = " + obj.num);
47
48// assignment should fail -- because we freeze
49Object.freeze(obj);
50print("frozen? " + Object.isFrozen(obj));
51
52print("assign 1729 to num");
53obj.num = 1729;
54print("num = " + obj.num);
55
56