| /* |
| * Any copyright is dedicated to the Public Domain. |
| * http://creativecommons.org/licenses/publicdomain/ |
| */ |
| |
| var gTestfile = 'proxy-__proto__.js'; |
| var BUGNUMBER = 770344; |
| var summary = "Behavior of __proto__ on proxies"; |
| |
| print(BUGNUMBER + ": " + summary); |
| |
| /************** |
| * BEGIN TEST * |
| **************/ |
| |
| var protoDesc = Object.getOwnPropertyDescriptor(Object.prototype, "__proto__"); |
| var protoGetter = protoDesc.get; |
| var protoSetter = protoDesc.set; |
| |
| function pp(arr) |
| { |
| return arr.map(function(v) { return "" + v; }).join(", "); |
| } |
| |
| function testProxy(creator, args, proto) |
| { |
| print("Now testing behavior for " + |
| "Proxy." + creator + "(" + pp(args) + ")"); |
| |
| var pobj = Proxy[creator].apply(Proxy, args); |
| |
| // Check [[Prototype]] before attempted mutation |
| assertEq(Object.getPrototypeOf(pobj), proto); |
| assertEq(protoGetter.call(pobj), proto); |
| |
| // Attempt [[Prototype]] mutation |
| protoSetter.call(pobj, null); |
| |
| // Check [[Prototype]] after attempted mutation |
| assertEq(Object.getPrototypeOf(pobj), null); |
| assertEq(protoGetter.call(pobj), null); |
| } |
| |
| // Proxy object with non-null [[Prototype]] |
| var nonNullProto = { toString: function() { return "non-null prototype"; } }; |
| var nonNullHandler = { toString: function() { return "non-null handler"; } }; |
| testProxy("create", [nonNullHandler, nonNullProto], nonNullProto); |
| |
| // Proxy object with null [[Prototype]] |
| var nullProto = null; |
| var nullHandler = { toString: function() { return "null handler"; } }; |
| testProxy("create", [nullHandler, nullProto], nullProto); |
| |
| // Proxy function with [[Call]] |
| var callForCallOnly = function () { }; |
| callForCallOnly.toString = function() { return "callForCallOnly"; }; |
| var callOnlyHandler = { toString: function() { return "call-only handler"; } }; |
| testProxy("createFunction", |
| [callOnlyHandler, callForCallOnly], Function.prototype); |
| |
| // Proxy function with [[Call]] and [[Construct]] |
| var callForCallConstruct = function() { }; |
| callForCallConstruct.toString = function() { return "call/construct call"; }; |
| var constructForCallConstruct = function() { }; |
| constructForCallConstruct.toString = |
| function() { return "call/construct construct"; }; |
| var handlerForCallConstruct = |
| { toString: function() { return "call/construct handler"; } }; |
| testProxy("createFunction", |
| [handlerForCallConstruct, |
| callForCallConstruct, |
| constructForCallConstruct], |
| Function.prototype); |
| |
| |
| /******************************************************************************/ |
| |
| if (typeof reportCompare === "function") |
| reportCompare(true, true); |
| |
| print("Tests complete"); |