test/built-ins/Object/preventExtensions/15.2.3.10-3-5.js


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19

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

/*---
es5id: 15.2.3.10-3-5
description: >
    Object.preventExtensions - indexed properties cannot be added into
    a String object
---*/

        var strObj = new String();
        var preCheck = Object.isExtensible(strObj);
        Object.preventExtensions(strObj);
assert.throws(TypeError, function() {
            Object.defineProperty(strObj, "0", { value: "c" });
});
assert(preCheck, 'preCheck !== true');
assert.sameValue(strObj.hasOwnProperty("0"), false, 'strObj.hasOwnProperty("0")');
assert.sameValue(typeof strObj[0], "undefined", 'typeof strObj[0]');