text: /// Copyright (c) 2012 Ecma International.  All rights reserved. 
  /// Ecma International makes this code available under the terms and conditions set
  /// forth on http://hg.ecmascript.org/tests/test262/raw-file/tip/LICENSE (the 
  /// "Use Terms").   Any redistribution of this code must retain the above 
  /// copyright and this notice and otherwise comply with the Use Terms.
  /**
   * @path ch15/15.2/15.2.3/15.2.3.10/15.2.3.10-3-20.js
   * @description Object.preventExtensions - named properties cannot be added into an Error object
   */
  
  
  function testcase() {
          var errObj = new Error();
          var preCheck = Object.isExtensible(errObj);
          Object.preventExtensions(errObj);
  
          errObj.exName = 2;
          return preCheck && !errObj.hasOwnProperty("exName");
      }
  runTestCase(testcase);
  