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
|
let logs = [];
for (let ctor of typedArrayConstructors) {
let arr = new ctor([1, 2, 3, 4, 5, 6, 7, 8]);
let ctorObj = {};
let proxyProto = new Proxy({}, {
get(that, name) {
logs.push("get proto." + String(name));
if (name == "constructor")
return ctorObj;
throw new Error("unexpected prop access");
}
});
arr.buffer.constructor = {
get [Symbol.species]() {
logs.push("get @@species");
let C = new Proxy(function(...args) {
logs.push("call ctor");
return new ArrayBuffer(...args);
}, {
get(that, name) {
logs.push("get ctor." + String(name));
if (name == "prototype") {
return proxyProto;
}
throw new Error("unexpected prop access");
}
});
return C;
}
};
for (let ctor2 of typedArrayConstructors) {
logs.length = 0;
let arr2 = new ctor2(arr);
assertDeepEq(logs, ["get @@species", "get ctor.prototype"]);
logs.length = 0;
assertEq(Object.getPrototypeOf(arr2.buffer), proxyProto);
assertDeepEq(logs, []);
logs.length = 0;
assertEq(arr2.buffer.constructor, ctorObj);
assertDeepEq(logs, ["get proto.constructor"]);
}
}
if (typeof reportCompare === "function")
reportCompare(true, true);
|
