JSTests/test262/test/built-ins/Object/preventExtensions/15.2.3.10-3-1.js

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

/*---
es5id: 15.2.3.10-3-1
description: >
    Object.preventExtensions - Object.isExtensible(arg) returns false
    if arg is the returned object
---*/

var obj = {};
var preCheck = Object.isExtensible(obj);
Object.preventExtensions(obj);

assert(preCheck, 'preCheck !== true');
assert.sameValue(Object.isExtensible(obj), false, 'Object.isExtensible(obj)');