js/src/tests/ecma_5/extensions/proxy-__proto__.js@6474c204b198 (annotated)
js/src/tests/ecma_5/extensions/proxy-__proto__.js
Wed, 31 Dec 2014 06:09:35 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Wed, 31 Dec 2014 06:09:35 +0100
- changeset 0
- 6474c204b198
- permissions
- -rw-r--r--
Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.
| michael@0 | 1 | /* |
| michael@0 | 2 | * Any copyright is dedicated to the Public Domain. |
| michael@0 | 3 | * http://creativecommons.org/licenses/publicdomain/ |
| michael@0 | 4 | */ |
| michael@0 | 5 | |
| michael@0 | 6 | var gTestfile = 'proxy-__proto__.js'; |
| michael@0 | 7 | var BUGNUMBER = 770344; |
| michael@0 | 8 | var summary = "Behavior of __proto__ on proxies"; |
| michael@0 | 9 | |
| michael@0 | 10 | print(BUGNUMBER + ": " + summary); |
| michael@0 | 11 | |
| michael@0 | 12 | /************** |
| michael@0 | 13 | * BEGIN TEST * |
| michael@0 | 14 | **************/ |
| michael@0 | 15 | |
| michael@0 | 16 | var protoDesc = Object.getOwnPropertyDescriptor(Object.prototype, "__proto__"); |
| michael@0 | 17 | var protoGetter = protoDesc.get; |
| michael@0 | 18 | var protoSetter = protoDesc.set; |
| michael@0 | 19 | |
| michael@0 | 20 | function pp(arr) |
| michael@0 | 21 | { |
| michael@0 | 22 | return arr.map(function(v) { return "" + v; }).join(", "); |
| michael@0 | 23 | } |
| michael@0 | 24 | |
| michael@0 | 25 | function testProxy(creator, args, proto) |
| michael@0 | 26 | { |
| michael@0 | 27 | print("Now testing behavior for " + |
| michael@0 | 28 | "Proxy." + creator + "(" + pp(args) + ")"); |
| michael@0 | 29 | |
| michael@0 | 30 | var pobj = Proxy[creator].apply(Proxy, args); |
| michael@0 | 31 | |
| michael@0 | 32 | // Check [[Prototype]] before attempted mutation |
| michael@0 | 33 | assertEq(Object.getPrototypeOf(pobj), proto); |
| michael@0 | 34 | assertEq(protoGetter.call(pobj), proto); |
| michael@0 | 35 | |
| michael@0 | 36 | // Attempt [[Prototype]] mutation |
| michael@0 | 37 | protoSetter.call(pobj, null); |
| michael@0 | 38 | |
| michael@0 | 39 | // Check [[Prototype]] after attempted mutation |
| michael@0 | 40 | assertEq(Object.getPrototypeOf(pobj), null); |
| michael@0 | 41 | assertEq(protoGetter.call(pobj), null); |
| michael@0 | 42 | } |
| michael@0 | 43 | |
| michael@0 | 44 | // Proxy object with non-null [[Prototype]] |
| michael@0 | 45 | var nonNullProto = { toString: function() { return "non-null prototype"; } }; |
| michael@0 | 46 | var nonNullHandler = { toString: function() { return "non-null handler"; } }; |
| michael@0 | 47 | testProxy("create", [nonNullHandler, nonNullProto], nonNullProto); |
| michael@0 | 48 | |
| michael@0 | 49 | // Proxy object with null [[Prototype]] |
| michael@0 | 50 | var nullProto = null; |
| michael@0 | 51 | var nullHandler = { toString: function() { return "null handler"; } }; |
| michael@0 | 52 | testProxy("create", [nullHandler, nullProto], nullProto); |
| michael@0 | 53 | |
| michael@0 | 54 | // Proxy function with [[Call]] |
| michael@0 | 55 | var callForCallOnly = function () { }; |
| michael@0 | 56 | callForCallOnly.toString = function() { return "callForCallOnly"; }; |
| michael@0 | 57 | var callOnlyHandler = { toString: function() { return "call-only handler"; } }; |
| michael@0 | 58 | testProxy("createFunction", |
| michael@0 | 59 | [callOnlyHandler, callForCallOnly], Function.prototype); |
| michael@0 | 60 | |
| michael@0 | 61 | // Proxy function with [[Call]] and [[Construct]] |
| michael@0 | 62 | var callForCallConstruct = function() { }; |
| michael@0 | 63 | callForCallConstruct.toString = function() { return "call/construct call"; }; |
| michael@0 | 64 | var constructForCallConstruct = function() { }; |
| michael@0 | 65 | constructForCallConstruct.toString = |
| michael@0 | 66 | function() { return "call/construct construct"; }; |
| michael@0 | 67 | var handlerForCallConstruct = |
| michael@0 | 68 | { toString: function() { return "call/construct handler"; } }; |
| michael@0 | 69 | testProxy("createFunction", |
| michael@0 | 70 | [handlerForCallConstruct, |
| michael@0 | 71 | callForCallConstruct, |
| michael@0 | 72 | constructForCallConstruct], |
| michael@0 | 73 | Function.prototype); |
| michael@0 | 74 | |
| michael@0 | 75 | |
| michael@0 | 76 | /******************************************************************************/ |
| michael@0 | 77 | |
| michael@0 | 78 | if (typeof reportCompare === "function") |
| michael@0 | 79 | reportCompare(true, true); |
| michael@0 | 80 | |
| michael@0 | 81 | print("Tests complete"); |
