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
|
/* Any copyright is dedicated to the Public Domain.
* http://creativecommons.org/publicdomain/zero/1.0/ */
function logProxy(object = {}, handler = {}) {
var log = [];
var proxy = new Proxy(object, new Proxy(handler, {
get(target, propertyKey, receiver) {
log.push(propertyKey);
return target[propertyKey];
}
}));
return {proxy, log};
}
// The order of operations is backwards when compared to ES6 draft rev 27
// (2014 August 24), but see https://bugs.ecmascript.org/show_bug.cgi?id=3215
// for an explanation on why the spec version is clearly wrong.
var {proxy, log} = logProxy();
Object.freeze(proxy);
assertDeepEq(log, ["preventExtensions", "ownKeys"]);
var {proxy, log} = logProxy();
Object.freeze(Object.freeze(proxy));
assertDeepEq(log, ["preventExtensions", "ownKeys", "preventExtensions", "ownKeys"]);
reportCompare(0, 0);
|
