blob: f84d14edadf2fc637fe4d0844ecd3dfdb68d3dc9 (
plain)
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
|
// Copyright (c) 2012 Ecma International. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
info: |
Step 4 of defineProperty calls the [[DefineOwnProperty]] internal method
of O to define the property. For configurable properties, step 9b of
[[DefineOwnProperty]] permits changing the kind of a property.
es5id: 15.2.3.6-4-14
description: >
Object.defineProperty permits changing data property to accessor
property for configurable properties
---*/
var o = {};
// create a data property. In this case,
// [[Enumerable]] and [[Configurable]] are true
o["foo"] = 101;
// changing "foo" to be an accessor should succeed, since [[Configurable]]
// on the original property will be true. Existing values of [[Configurable]]
// and [[Enumerable]] need to be preserved and the rest need to be set to
// their default values
// dummy getter
var getter = function() {
return 1;
}
var d1 = {
get: getter
};
Object.defineProperty(o, "foo", d1);
var d2 = Object.getOwnPropertyDescriptor(o, "foo");
assert.sameValue(d2.get, getter, 'd2.get');
assert.sameValue(d2.enumerable, true, 'd2.enumerable');
assert.sameValue(d2.configurable, true, 'd2.configurable');
reportCompare(0, 0);
|
