JSTests/test262/test/built-ins/Object/preventExtensions/15.2.3.10-3-15.js

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

/*---
es5id: 15.2.3.10-3-15
description: >
    Object.preventExtensions - named properties cannot be added into a
    String object
includes: [propertyHelper.js]
---*/

var obj = new String("bbq");

assert(Object.isExtensible(obj));
Object.preventExtensions(obj);
assert(!Object.isExtensible(obj));

verifyNotWritable(obj, "exName", "nocheck");

assert(!obj.hasOwnProperty("exName"));