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
|
// Copyright 2017 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
const obj = {};
Object.defineProperty(obj, 'value', {
enumerable: true,
configurable: true,
get: assertUnreachable,
set: assertUnreachable,
});
let called_get = false;
let called_has = false;
let called_set = false;
const has = function(target, prop) {
assertEquals('value', prop);
called_has = true;
return false; // Need to return false to trigger GetOwnProperty call.
};
const get = function(target, prop) {
assertEquals('value', prop);
called_get = true;
return 'yep';
};
const set = function(target, prop, value) {
assertEquals('value', prop);
called_set = true;
return true; // Need to return true to trigger GetOwnProperty call.
};
const proxy = new Proxy(obj, { has, get, set });
assertFalse(Reflect.has(proxy, 'value'));
assertTrue(called_has);
assertEquals('nope', proxy.value = 'nope');
assertTrue(called_set);
assertEquals('yep', proxy.value);
assertTrue(called_get);
|
