blob: 2fc369c50295aa4c76cc7577458421141efd982c (
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
|
/// Copyright (c) 2012 Ecma International. All rights reserved.
/// Ecma International makes this code available under the terms and conditions set
/// forth on http://hg.ecmascript.org/tests/test262/raw-file/tip/LICENSE (the
/// "Use Terms"). Any redistribution of this code must retain the above
/// copyright and this notice and otherwise comply with the Use Terms.
/**
* Step 4 of defineProperty calls the [[DefineOwnProperty]] internal method
* of O to define the property. For configurable properties, step 9c of
* [[DefineOwnProperty]] permits changing the kind of a property.
*
* @path ch15/15.2/15.2.3/15.2.3.6/15.2.3.6-4-15.js
* @description Object.defineProperty permits changing accessor property to data property for configurable properties
*/
function testcase() {
var o = {};
// define an accessor property
// dummy getter
var getter = function () { return 1; }
var d1 = { get: getter, configurable: true };
Object.defineProperty(o, "foo", d1);
// changing "foo" to be a data valued property 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.
var desc = { value: 101 };
Object.defineProperty(o, "foo", desc);
var d2 = Object.getOwnPropertyDescriptor(o, "foo");
if (d2.value === 101 &&
d2.writable === false &&
d2.enumerable === false &&
d2.configurable === true) {
return true;
}
}
runTestCase(testcase);
|
