1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
|
class base {
constructor() { }
}
let midStaticHandler = { };
// We shouldn't use the |this.called| strategy here, since we have proxies
// snooping property accesses.
let getterCalled, setterCalled;
class mid extends new Proxy(base, midStaticHandler) {
constructor() { super(); }
testSuperInProxy() {
super.prop = "looking";
assertEq(setterCalled, true);
assertEq(super.prop, "found");
assertEq(getterCalled, true);
}
}
class child extends mid {
constructor() { super(); }
static testStaticLookups() {
// This funtion is called more than once.
this.called = false;
super.prop;
assertEq(this.called, true);
}
}
let midInstance = new mid();
// Make sure proxies are searched properly on the prototype chain
let baseHandler = {
get(target, p, receiver) {
assertEq(receiver, midInstance);
getterCalled = true;
return "found";
},
set(t,p,val,receiver) {
assertEq(receiver, midInstance);
assertEq(val, "looking");
setterCalled = true;
return true;
}
}
Object.setPrototypeOf(base.prototype, new Proxy(Object.prototype, baseHandler));
// make sure subclasses are not searched on static or super lookups.
let childHandler = {
get() { throw "NO!"; },
set() { throw "NO!"; }
}
Object.setPrototypeOf(child.prototype, new Proxy(mid.prototype, childHandler));
midInstance.testSuperInProxy();
// Don't do this earlier to avoid the lookup of .prototype during class creation
function midGet(target, p, receiver) {
assertEq(receiver, child);
receiver.called = true;
}
midStaticHandler.get = midGet;
child.testStaticLookups();
// Hey does super work in a proxy?
assertEq(new Proxy(({ method() { return super.hasOwnProperty("method"); } }), {}).method(), true);
// What about a CCW?
var g = newGlobal();
var wrappedSuper = g.eval("({ method() { return super.hasOwnProperty('method'); } })");
assertEq(wrappedSuper.method(), true);
// With a CCW on the proto chain?
var wrappedBase = g.eval("({ method() { return this.__secretProp__; } })");
var unwrappedDerived = { __secretProp__: 42, method() { return super.method(); } }
Object.setPrototypeOf(unwrappedDerived, wrappedBase);
assertEq(unwrappedDerived.method(), 42);
if (typeof reportCompare === 'function')
reportCompare(0,0,"OK");
|
