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
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21 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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26 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 // Fake Symbol if undefined, allowing test to run in non-Harmony mode as well.
29 this.Symbol = typeof Symbol != 'undefined' ? Symbol : String;
32 var desc = Object.getOwnPropertyDescriptor(Object.prototype, "__proto__");
33 var getProto = desc.get;
34 var setProto = desc.set;
36 function TestNoPoisonPill() {
37 assertEquals("function", typeof desc.get);
38 assertEquals("function", typeof desc.set);
39 assertDoesNotThrow("desc.get.call({})");
40 assertDoesNotThrow("desc.set.call({}, {})");
44 desc.set.call(obj, obj2);
45 assertEquals(obj.__proto__, obj2);
46 assertEquals(desc.get.call(obj), obj2);
51 function TestRedefineObjectPrototypeProtoGetter() {
52 Object.defineProperty(Object.prototype, "__proto__", {
57 assertEquals({}.__proto__, 42);
58 assertEquals(desc.get.call({}), Object.prototype);
60 var desc2 = Object.getOwnPropertyDescriptor(Object.prototype, "__proto__");
61 assertEquals(desc2.get.call({}), 42);
62 assertEquals(desc2.set.call({}), undefined);
64 Object.defineProperty(Object.prototype, "__proto__", {
67 var desc3 = Object.getOwnPropertyDescriptor(Object.prototype, "__proto__");
68 assertEquals(desc3.get.call({}), 42);
69 assertEquals(desc3.set.call({}), undefined);
71 TestRedefineObjectPrototypeProtoGetter();
74 function TestRedefineObjectPrototypeProtoSetter() {
75 Object.defineProperty(Object.prototype, "__proto__", { set: undefined });
76 assertThrows(function() {
83 TestRedefineObjectPrototypeProtoSetter();
86 function TestGetProtoOfValues() {
87 assertEquals(getProto.call(1), Number.prototype);
88 assertEquals(getProto.call(true), Boolean.prototype);
89 assertEquals(getProto.call(false), Boolean.prototype);
90 assertEquals(getProto.call('s'), String.prototype);
91 assertEquals(getProto.call(Symbol()), Symbol.prototype);
93 assertThrows(function() { getProto.call(null); }, TypeError);
94 assertThrows(function() { getProto.call(undefined); }, TypeError);
96 TestGetProtoOfValues();
99 var values = [1, true, false, 's', Symbol()];
102 function TestSetProtoOfValues() {
104 for (var i = 0; i < values.length; i++) {
105 assertEquals(setProto.call(values[i], proto), undefined);
108 assertThrows(function() { setProto.call(null, proto); }, TypeError);
109 assertThrows(function() { setProto.call(undefined, proto); }, TypeError);
111 TestSetProtoOfValues();
114 function TestSetProtoToValue() {
117 setProto.call(object, proto);
119 var valuesWithUndefined = values.concat(undefined);
121 for (var i = 0; i < valuesWithUndefined.length; i++) {
122 assertEquals(setProto.call(object, valuesWithUndefined[i]), undefined);
123 assertEquals(getProto.call(object), proto);
126 // null is the only valid value that can be used as a [[Prototype]].
127 assertEquals(setProto.call(object, null), undefined);
128 assertEquals(getProto.call(object), null);
130 TestSetProtoToValue();
133 function TestDeleteProto() {
134 assertTrue(delete Object.prototype.__proto__);
138 assertEquals(Object.getPrototypeOf(o), Object.prototype);
139 var desc4 = Object.getOwnPropertyDescriptor(o, "__proto__");
140 assertTrue(desc4.configurable);
141 assertTrue(desc4.enumerable);
142 assertTrue(desc4.writable);
143 assertEquals(desc4.value, p);