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comparison: js/src/tests/ecma_5/Object/mutation-prevention-methods.js
js/src/tests/ecma_5/Object/mutation-prevention-methods.js
- branch
- TOR_BUG_3246
- changeset 7
- 129ffea94266
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| -1:000000000000 | 0:c235c322ac4c |
|---|---|
| 1 /* | |
| 2 * Any copyright is dedicated to the Public Domain. | |
| 3 * http://creativecommons.org/licenses/publicdomain/ | |
| 4 * Contributor: | |
| 5 * Jeff Walden <jwalden+code@mit.edu> | |
| 6 */ | |
| 7 | |
| 8 var gTestfile = 'mutation-prevention-methods.js'; | |
| 9 //----------------------------------------------------------------------------- | |
| 10 var BUGNUMBER = 492849; | |
| 11 var summary = 'Object.is{Sealed,Frozen}, Object.{seal,freeze}'; | |
| 12 | |
| 13 print(BUGNUMBER + ": " + summary); | |
| 14 | |
| 15 /************** | |
| 16 * BEGIN TEST * | |
| 17 **************/ | |
| 18 | |
| 19 // Empty object | |
| 20 | |
| 21 var o1 = {}; | |
| 22 | |
| 23 assertEq(Object.isExtensible(o1), true); | |
| 24 assertEq(Object.isSealed(o1), false); | |
| 25 assertEq(Object.isFrozen(o1), false); | |
| 26 | |
| 27 Object.preventExtensions(o1); | |
| 28 | |
| 29 // An non-extensible empty object has no properties, so it is vacuously sealed | |
| 30 // and frozen. | |
| 31 assertEq(Object.isExtensible(o1), false); | |
| 32 assertEq(Object.isSealed(o1), true); | |
| 33 assertEq(Object.isFrozen(o1), true); | |
| 34 | |
| 35 | |
| 36 // Object with a data property | |
| 37 | |
| 38 var o2 = { 1: 2 }; | |
| 39 | |
| 40 assertEq(Object.isExtensible(o2), true); | |
| 41 assertEq(Object.isSealed(o2), false); | |
| 42 assertEq(Object.isFrozen(o2), false); | |
| 43 | |
| 44 Object.preventExtensions(o2); | |
| 45 | |
| 46 assertEq(Object.isExtensible(o2), false); | |
| 47 assertEq(Object.isSealed(o2), false); | |
| 48 assertEq(Object.isFrozen(o2), false); | |
| 49 | |
| 50 Object.seal(o2); | |
| 51 | |
| 52 assertEq(Object.isExtensible(o2), false); | |
| 53 assertEq(Object.isSealed(o2), true); | |
| 54 assertEq(Object.isFrozen(o2), false); | |
| 55 | |
| 56 assertEq(o2[1], 2); | |
| 57 | |
| 58 var desc; | |
| 59 | |
| 60 desc = Object.getOwnPropertyDescriptor(o2, "1"); | |
| 61 assertEq(typeof desc, "object"); | |
| 62 assertEq(desc.enumerable, true); | |
| 63 assertEq(desc.configurable, false); | |
| 64 assertEq(desc.value, 2); | |
| 65 assertEq(desc.writable, true); | |
| 66 | |
| 67 o2[1] = 17; | |
| 68 | |
| 69 assertEq(o2[1], 17); | |
| 70 | |
| 71 desc = Object.getOwnPropertyDescriptor(o2, "1"); | |
| 72 assertEq(typeof desc, "object"); | |
| 73 assertEq(desc.enumerable, true); | |
| 74 assertEq(desc.configurable, false); | |
| 75 assertEq(desc.value, 17); | |
| 76 assertEq(desc.writable, true); | |
| 77 | |
| 78 Object.freeze(o2); | |
| 79 | |
| 80 assertEq(o2[1], 17); | |
| 81 | |
| 82 desc = Object.getOwnPropertyDescriptor(o2, "1"); | |
| 83 assertEq(typeof desc, "object"); | |
| 84 assertEq(desc.enumerable, true); | |
| 85 assertEq(desc.configurable, false); | |
| 86 assertEq(desc.value, 17); | |
| 87 assertEq(desc.writable, false); | |
| 88 | |
| 89 | |
| 90 // Object with an accessor property | |
| 91 | |
| 92 var o3 = { get foo() { return 17; } }; | |
| 93 | |
| 94 assertEq(Object.isExtensible(o3), true); | |
| 95 assertEq(Object.isSealed(o3), false); | |
| 96 assertEq(Object.isFrozen(o3), false); | |
| 97 | |
| 98 Object.preventExtensions(o3); | |
| 99 | |
| 100 assertEq(Object.isExtensible(o3), false); | |
| 101 assertEq(Object.isSealed(o3), false); | |
| 102 assertEq(Object.isFrozen(o3), false); | |
| 103 | |
| 104 Object.seal(o3); | |
| 105 | |
| 106 // An accessor property in a sealed object is unchanged if that object is | |
| 107 // frozen, so a sealed object containing only accessor properties is also | |
| 108 // vacuously frozen. | |
| 109 assertEq(Object.isExtensible(o3), false); | |
| 110 assertEq(Object.isSealed(o3), true); | |
| 111 assertEq(Object.isFrozen(o3), true); | |
| 112 | |
| 113 Object.freeze(o3); | |
| 114 | |
| 115 assertEq(Object.isExtensible(o3), false); | |
| 116 assertEq(Object.isSealed(o3), true); | |
| 117 assertEq(Object.isFrozen(o3), true); | |
| 118 | |
| 119 | |
| 120 /******************************************************************************/ | |
| 121 | |
| 122 reportCompare(true, true); | |
| 123 | |
| 124 print("All tests passed!"); |
