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
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.
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.
28 var desc = Object.getOwnPropertyDescriptor(Object.prototype, "__proto__");
29 assertEquals("function", typeof desc.get);
30 assertEquals("function", typeof desc.set);
31 assertDoesNotThrow("desc.get.call({})");
32 assertDoesNotThrow("desc.set.call({}, {})");
37 desc.set.call(obj, obj2);
38 assertEquals(obj.__proto__, obj2);
39 assertEquals(desc.get.call(obj), obj2);
42 // Check that any redefinition of the __proto__ accessor works.
43 Object.defineProperty(Object.prototype, "__proto__", {
48 assertEquals({}.__proto__, 42);
49 assertEquals(desc.get.call({}), Object.prototype);
52 var desc2 = Object.getOwnPropertyDescriptor(Object.prototype, "__proto__");
53 assertEquals(desc2.get.call({}), 42);
54 assertDoesNotThrow("desc2.set.call({})");
57 Object.defineProperty(Object.prototype, "__proto__", { set:function(x){} });
58 var desc3 = Object.getOwnPropertyDescriptor(Object.prototype, "__proto__");
59 assertDoesNotThrow("desc3.get.call({})");
60 assertDoesNotThrow("desc3.set.call({})");
63 Object.defineProperty(Object.prototype, "__proto__", { set: undefined });
64 assertThrows(function() {
72 assertTrue(delete Object.prototype.__proto__);
76 assertEquals(Object.getPrototypeOf(o), Object.prototype);
77 var desc4 = Object.getOwnPropertyDescriptor(o, "__proto__");
78 assertTrue(desc4.configurable);
79 assertTrue(desc4.enumerable);
80 assertTrue(desc4.writable);
81 assertEquals(desc4.value, p);