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comparison: js/src/tests/ecma_5/extensions/proxy-__proto__.js
js/src/tests/ecma_5/extensions/proxy-__proto__.js
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| -1:000000000000 | 0:2c5a4d993ba7 |
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| 1 /* | |
| 2 * Any copyright is dedicated to the Public Domain. | |
| 3 * http://creativecommons.org/licenses/publicdomain/ | |
| 4 */ | |
| 5 | |
| 6 var gTestfile = 'proxy-__proto__.js'; | |
| 7 var BUGNUMBER = 770344; | |
| 8 var summary = "Behavior of __proto__ on proxies"; | |
| 9 | |
| 10 print(BUGNUMBER + ": " + summary); | |
| 11 | |
| 12 /************** | |
| 13 * BEGIN TEST * | |
| 14 **************/ | |
| 15 | |
| 16 var protoDesc = Object.getOwnPropertyDescriptor(Object.prototype, "__proto__"); | |
| 17 var protoGetter = protoDesc.get; | |
| 18 var protoSetter = protoDesc.set; | |
| 19 | |
| 20 function pp(arr) | |
| 21 { | |
| 22 return arr.map(function(v) { return "" + v; }).join(", "); | |
| 23 } | |
| 24 | |
| 25 function testProxy(creator, args, proto) | |
| 26 { | |
| 27 print("Now testing behavior for " + | |
| 28 "Proxy." + creator + "(" + pp(args) + ")"); | |
| 29 | |
| 30 var pobj = Proxy[creator].apply(Proxy, args); | |
| 31 | |
| 32 // Check [[Prototype]] before attempted mutation | |
| 33 assertEq(Object.getPrototypeOf(pobj), proto); | |
| 34 assertEq(protoGetter.call(pobj), proto); | |
| 35 | |
| 36 // Attempt [[Prototype]] mutation | |
| 37 protoSetter.call(pobj, null); | |
| 38 | |
| 39 // Check [[Prototype]] after attempted mutation | |
| 40 assertEq(Object.getPrototypeOf(pobj), null); | |
| 41 assertEq(protoGetter.call(pobj), null); | |
| 42 } | |
| 43 | |
| 44 // Proxy object with non-null [[Prototype]] | |
| 45 var nonNullProto = { toString: function() { return "non-null prototype"; } }; | |
| 46 var nonNullHandler = { toString: function() { return "non-null handler"; } }; | |
| 47 testProxy("create", [nonNullHandler, nonNullProto], nonNullProto); | |
| 48 | |
| 49 // Proxy object with null [[Prototype]] | |
| 50 var nullProto = null; | |
| 51 var nullHandler = { toString: function() { return "null handler"; } }; | |
| 52 testProxy("create", [nullHandler, nullProto], nullProto); | |
| 53 | |
| 54 // Proxy function with [[Call]] | |
| 55 var callForCallOnly = function () { }; | |
| 56 callForCallOnly.toString = function() { return "callForCallOnly"; }; | |
| 57 var callOnlyHandler = { toString: function() { return "call-only handler"; } }; | |
| 58 testProxy("createFunction", | |
| 59 [callOnlyHandler, callForCallOnly], Function.prototype); | |
| 60 | |
| 61 // Proxy function with [[Call]] and [[Construct]] | |
| 62 var callForCallConstruct = function() { }; | |
| 63 callForCallConstruct.toString = function() { return "call/construct call"; }; | |
| 64 var constructForCallConstruct = function() { }; | |
| 65 constructForCallConstruct.toString = | |
| 66 function() { return "call/construct construct"; }; | |
| 67 var handlerForCallConstruct = | |
| 68 { toString: function() { return "call/construct handler"; } }; | |
| 69 testProxy("createFunction", | |
| 70 [handlerForCallConstruct, | |
| 71 callForCallConstruct, | |
| 72 constructForCallConstruct], | |
| 73 Function.prototype); | |
| 74 | |
| 75 | |
| 76 /******************************************************************************/ | |
| 77 | |
| 78 if (typeof reportCompare === "function") | |
| 79 reportCompare(true, true); | |
| 80 | |
| 81 print("Tests complete"); |
