The Tor Browser / file revision

 /*

  * Any copyright is dedicated to the Public Domain.

  * http://creativecommons.org/licenses/publicdomain/

  * Contributor:

  *   Jeff Walden <jwalden+code@mit.edu>

  */

 var gTestfile = '15.2.3.4-01.js';

 //-----------------------------------------------------------------------------

 var BUGNUMBER = 492849;

 var summary = 'ES5: Implement Object.preventExtensions, Object.isExtensible';

 print(BUGNUMBER + ": " + summary);

 /**************

  * BEGIN TEST *

  **************/

 assertEq(typeof Object.isExtensible, "function");

 assertEq(Object.isExtensible.length, 1);

 var slowArray = [1, 2, 3];

 slowArray.slow = 5;

 var objs =

   [{}, { 1: 2 }, { a: 3 }, [], [1], [, 1], slowArray, function a(){}, /a/];

 for (var i = 0, sz = objs.length; i < sz; i++)

 {

   var o = objs[i];

   assertEq(Object.isExtensible(o), true, "object " + i + " not extensible?");

   var o2 = Object.preventExtensions(o);

   assertEq(o, o2);

   assertEq(Object.isExtensible(o), false, "object " + i + " is extensible?");

 }

 /******************************************************************************/

 reportCompare(true, true);

 print("All tests passed!");