The Tor Browser / file comparison
comparison: js/src/tests/js1_8_5/extensions/mutable-proto-special-form.js
js/src/tests/js1_8_5/extensions/mutable-proto-special-form.js
- branch
- TOR_BUG_3246
- changeset 7
- 129ffea94266
equal
deleted
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replaced
| -1:000000000000 | 0:3b4d00d92571 |
|---|---|
| 1 // Any copyright is dedicated to the Public Domain. | |
| 2 // http://creativecommons.org/licenses/publicdomain/ | |
| 3 | |
| 4 //----------------------------------------------------------------------------- | |
| 5 var BUGNUMBER = 948583; | |
| 6 var summary = | |
| 7 "Make __proto__ in object literals a special form not influenced by " + | |
| 8 "|Object.prototype|"; | |
| 9 | |
| 10 print(BUGNUMBER + ": " + summary); | |
| 11 | |
| 12 /************** | |
| 13 * BEGIN TEST * | |
| 14 **************/ | |
| 15 | |
| 16 var passed = true; | |
| 17 | |
| 18 function performProtoTests(msg) | |
| 19 { | |
| 20 print("Testing " + msg); | |
| 21 assertEq(passed, true, "passed wrong at start of test set"); | |
| 22 | |
| 23 assertEq(Object.getPrototypeOf({ __proto__: null }), null); | |
| 24 assertEq(Object.getPrototypeOf({ __proto__: undefined }), Object.prototype); | |
| 25 assertEq(Object.getPrototypeOf({ __proto__: 17 }), Object.prototype); | |
| 26 | |
| 27 var obj = {}; | |
| 28 assertEq(Object.getPrototypeOf({ __proto__: obj }), obj); | |
| 29 | |
| 30 assertEq(passed, true, "passed wrong at end of test set"); | |
| 31 print("Tests of " + msg + " passed!"); | |
| 32 } | |
| 33 | |
| 34 function poisonProto(obj) | |
| 35 { | |
| 36 Object.defineProperty(obj, "__proto__", | |
| 37 { | |
| 38 configurable: true, | |
| 39 enumerable: true, | |
| 40 set: function(v) { passed = false; }, | |
| 41 }); | |
| 42 } | |
| 43 | |
| 44 performProtoTests("initial behavior"); | |
| 45 | |
| 46 var desc = Object.getOwnPropertyDescriptor(Object.prototype, "__proto__"); | |
| 47 var setProto = desc.set; | |
| 48 delete Object.prototype.__proto__; | |
| 49 | |
| 50 performProtoTests("behavior after Object.prototype.__proto__ deletion"); | |
| 51 | |
| 52 Object.defineProperty(Object.prototype, "__proto__", | |
| 53 { | |
| 54 configurable: true, | |
| 55 enumerable: false, | |
| 56 set: function(v) { passed = false; }, | |
| 57 }); | |
| 58 | |
| 59 performProtoTests("behavior after making Object.prototype.__proto__ a " + | |
| 60 "custom setter"); | |
| 61 | |
| 62 Object.defineProperty(Object.prototype, "__proto__", { set: undefined }); | |
| 63 | |
| 64 performProtoTests("behavior after making Object.prototype.__proto__'s " + | |
| 65 "[[Set]] === undefined"); | |
| 66 | |
| 67 | |
| 68 var superProto = Object.create(null); | |
| 69 poisonProto(superProto); | |
| 70 setProto.call(Object.prototype, superProto); | |
| 71 | |
| 72 performProtoTests("behavior after mutating Object.prototype.[[Prototype]]"); | |
| 73 | |
| 74 // Note: The handler below will have to be updated to exempt a scriptable | |
| 75 // getPrototypeOf trap (to instead consult the target whose [[Prototype]] | |
| 76 // is safely non-recursive), if we ever implement one. | |
| 77 var death = new Proxy(Object.create(null), | |
| 78 new Proxy({}, { get: function() { passed = false; } })); | |
| 79 | |
| 80 setProto.call(Object.prototype, death); | |
| 81 | |
| 82 performProtoTests("behavior after making Object.prototype.[[Prototype]] a " + | |
| 83 "proxy that throws for any access"); | |
| 84 | |
| 85 | |
| 86 if (typeof reportCompare === "function") | |
| 87 reportCompare(true, true); | |
| 88 | |
| 89 print("Tests complete"); |
