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
|
let sym = Symbol();
let o = {x: 1, y: 2, z: 3, a: 4, b: 5, 12345678: 6, [sym]: 7};
for (let i = 0; i < 100; i++) {
o["foo" + i] = 1;
}
delete o.x;
Object.seal(o);
assertEq(Object.getOwnPropertyNames(o).length, 105);
assertEq(Object.getOwnPropertySymbols(o).length, 1);
assertEq(Object.isSealed(o), true);
assertEq(Object.isFrozen(o), false);
let desc = Object.getOwnPropertyDescriptor(o, "y");
assertEq(desc.writable, true);
assertEq(desc.configurable, false);
Object.freeze(o);
assertEq(Object.isSealed(o), true);
assertEq(Object.isFrozen(o), true);
desc = Object.getOwnPropertyDescriptor(o, "y");
assertEq(desc.writable, false);
assertEq(desc.configurable, false);
|
