object-seal-the-extension-of-o-is-prevented-already.js

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// Copyright (c) 2012 Ecma International.  All rights reserved.

// This code is governed by the BSD license found in the LICENSE file.

/*---

esid: sec-setintegritylevel

description: Object.seal - the extension of 'O' is prevented already

---*/

var obj = {};

obj.foo = 10; // default value of attributes: writable: true, configurable: true, enumerable: true

var preCheck = Object.isExtensible(obj);

Object.preventExtensions(obj);

Object.seal(obj);

assert(preCheck, 'preCheck !== true');

assert(Object.isSealed(obj), 'Object.isSealed(obj) !== true');

reportCompare(0, 0);