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Side by Side Diff: test/mjsunit/element-read-only.js

Issue 1228113003: Fix non-standard element handling (Closed) Base URL: https://chromium.googlesource.com/v8/v8.git@master
Patch Set: Remove handle Created 5 years, 5 months ago
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1 // Copyright 2015 the V8 project authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 function f(a, b, c, d) { return arguments; }
6
7 // Ensure non-configurable argument elements stay non-configurable.
8 (function () {
9 var args = f(1);
10 Object.defineProperty(args, "0", {value: 10, configurable: false});
11 assertFalse(Object.getOwnPropertyDescriptor(args, "0").configurable);
12 for (var i = 0; i < 10; i++) {
13 args[i] = 1;
14 }
15 assertFalse(Object.getOwnPropertyDescriptor(args, "0").configurable);
16 })();
17
18 // Ensure read-only properties on the prototype chain cause TypeError.
19
20 // Newly added.
21 (function () {
22 var o = [];
23 var proto = {};
24 var index = 3;
25 function store(o, i, v) { "use strict"; o[i] = v; };
26 o.__proto__ = proto;
27 for (var i = 0; i < index; i++) {
28 store(o, i, 0);
29 }
30 Object.defineProperty(proto, index, {value: 100, writable: false});
31 assertThrows(function() { store(o, index, 0); });
32 assertEquals(100, o[index]);
33 })();
34
35 // Reconfigured.
36 (function () {
37 var o = [];
38 var proto = {3: 10000};
39 var index = 3;
40 function store(o, i, v) { "use strict"; o[i] = v; };
41 o.__proto__ = proto;
42 for (var i = 0; i < index; i++) {
43 store(o, i, 0);
44 }
45 Object.defineProperty(proto, index, {value: 100, writable: false});
46 assertThrows(function() { store(o, index, 0); });
47 assertEquals(100, o[index]);
48 })();
49
50 // Newly added to arguments object.
51 (function () {
52 var o = [];
53 var proto = f(100);
54 var index = 3;
55 function store(o, i, v) { "use strict"; o[i] = v; };
56 o.__proto__ = proto;
57 for (var i = 0; i < index; i++) {
58 store(o, i, 0);
59 }
60 Object.defineProperty(proto, index, {value: 100, writable: false});
61 assertThrows(function() { store(o, index, 0); });
62 assertEquals(100, o[index]);
63 })();
64
65 // Reconfigured on to arguments object.
66 (function () {
67 var o = [];
68 var proto = f(100, 200, 300, 400);
69 var index = 3;
70 function store(o, i, v) { "use strict"; o[i] = v; };
71 o.__proto__ = proto;
72 for (var i = 0; i < index; i++) {
73 store(o, i, 0);
74 }
75 Object.defineProperty(proto, index, {value: 100, writable: false});
76 assertThrows(function() { store(o, index, 0); });
77 assertEquals(100, o[index]);
78 })();
79
80 // Extensions prevented object.
81 (function () {
82 var o = [];
83 var proto = [0, 1, 2, 3];
84 var index = 3;
85 function store(o, i, v) { "use strict"; o[i] = v; };
86 o.__proto__ = proto;
87 for (var i = 0; i < index; i++) {
88 store(o, i, 0);
89 }
90 Object.preventExtensions(proto);
91 Object.defineProperty(proto, index, {value: 100, writable: false});
92 assertThrows(function() { store(o, index, 0); });
93 assertEquals(100, o[index]);
94 })();
95
96 // Extensions prevented arguments object.
97 (function () {
98 var o = [];
99 var proto = f(100, 200, 300, 400);
100 var index = 3;
101 function store(o, i, v) { "use strict"; o[i] = v; };
102 o.__proto__ = proto;
103 for (var i = 0; i < index; i++) {
104 store(o, i, 0);
105 }
106 Object.preventExtensions(proto);
107 Object.defineProperty(proto, index, {value: 100, writable: false});
108 assertThrows(function() { store(o, index, 0); });
109 assertEquals(100, o[index]);
110 })();
111
112 // Array with large index.
113 (function () {
114 var o = [];
115 var proto = [];
116 var index = 3;
117 function store(o, i, v) { "use strict"; o[i] = v; };
118 o.__proto__ = proto;
119 for (var i = 0; i < index; i++) {
120 store(o, i, 0);
121 }
122 proto[1 << 30] = 1;
123 Object.defineProperty(proto, index, {value: 100, writable: false});
124 assertThrows(function() { store(o, index, 0); });
125 assertEquals(100, o[index]);
126 })();
127
128 // Frozen object.
129 (function () {
130 var o = [];
131 var proto = [0, 1, 2, 3];
132 function store(o, i, v) { "use strict"; o[i] = v; };
133 o.__proto__ = proto;
134 for (var i = 0; i < 3; i++) {
135 store(o, i, 0);
136 }
137 Object.freeze(proto);
138 assertThrows(function() { store(o, 3, 0); });
139 assertEquals(3, o[3]);
140 })();
141
142 // Frozen arguments object.
143 (function () {
144 var o = [];
145 var proto = f(0, 1, 2, 3);
146 function store(o, i, v) { "use strict"; o[i] = v; };
147 o.__proto__ = proto;
148 for (var i = 0; i < 3; i++) {
149 store(o, i, 0);
150 }
151 Object.freeze(proto);
152 assertThrows(function() { store(o, 3, 0); });
153 assertEquals(3, o[3]);
154 })();
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