test/built-ins/Object/defineProperty/15.2.3.6-4-339-4.js


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

// Copyright (c) 2012 Ecma International.  All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.

/*---
es5id: 15.2.3.6-4-339-4
description: >
    Object.defineProperty - Updating indexed data property 'P' with
    attributes [[Writable]]: true, [[Enumerable]]: true,
    [[Configurable]]: false to an accessor property does not succeed,
    'O' is an Arguments object (8.12.9 - step 9.a)
includes: [runTestCase.js]
---*/

function testcase() {
        var obj = (function () {
            return arguments;
        }());

        Object.defineProperty(obj, "0", {
            value: 2010,
            writable: true,
            enumerable: true,
            configurable: false
        });
        var propertyDefineCorrect = obj.hasOwnProperty("0");
        var desc1 = Object.getOwnPropertyDescriptor(obj, "0");

        function getFunc() {
            return 20;
        }
        try {
            Object.defineProperty(obj, "0", {
                get: getFunc
            });
            return false;
        } catch (e) {
            var desc2 = Object.getOwnPropertyDescriptor(obj, "0");
            return propertyDefineCorrect && desc1.value === 2010 && obj[0] === 2010 &&
                typeof desc2.get === "undefined" && e instanceof TypeError;
        }
    }
runTestCase(testcase);