1// Copyright 2013 the V8 project authors. All rights reserved.
2// Redistribution and use in source and binary forms, with or without
3// modification, are permitted provided that the following conditions are
4// met:
5//
6//     * Redistributions of source code must retain the above copyright
7//       notice, this list of conditions and the following disclaimer.
8//     * Redistributions in binary form must reproduce the above
9//       copyright notice, this list of conditions and the following
10//       disclaimer in the documentation and/or other materials provided
11//       with the distribution.
12//     * Neither the name of Google Inc. nor the names of its
13//       contributors may be used to endorse or promote products derived
14//       from this software without specific prior written permission.
15//
16// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
18// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
19// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
20// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27
28// Check baseline for __proto__.
29var desc = Object.getOwnPropertyDescriptor(Object.prototype, "__proto__");
30assertFalse(desc.enumerable);
31assertTrue(desc.configurable);
32assertEquals("function", typeof desc.get);
33assertEquals("function", typeof desc.set);
34
35// Check redefining getter for __proto__.
36function replaced_get() {};
37Object.defineProperty(Object.prototype, "__proto__", { get:replaced_get });
38desc = Object.getOwnPropertyDescriptor(Object.prototype, "__proto__");
39assertFalse(desc.enumerable);
40assertTrue(desc.configurable);
41assertSame(replaced_get, desc.get);
42
43// Check redefining setter for __proto__.
44function replaced_set(x) {};
45Object.defineProperty(Object.prototype, "__proto__", { set:replaced_set });
46desc = Object.getOwnPropertyDescriptor(Object.prototype, "__proto__");
47assertFalse(desc.enumerable);
48assertTrue(desc.configurable);
49assertSame(replaced_set, desc.set);
50
51// Check changing configurability of __proto__.
52Object.defineProperty(Object.prototype, "__proto__", { configurable:false });
53desc = Object.getOwnPropertyDescriptor(Object.prototype, "__proto__");
54assertFalse(desc.enumerable);
55assertFalse(desc.configurable);
56assertSame(replaced_get, desc.get);
57assertSame(replaced_set, desc.set);
58
59// Check freezing Object.prototype completely.
60Object.freeze(Object.prototype);
61assertTrue(Object.isFrozen(Object.prototype));
62