text: // Copyright (c) 2012 Ecma International.  All rights reserved.
  // This code is governed by the BSD license found in the LICENSE file.
  
  /*---
  es5id: 15.2.3.8-2-a-12
  description: >
      Object.seal - 'P' is own property of a Date object that uses
      Object's [[GetOwnProperty]]
  includes: [propertyHelper.js]
  ---*/
  
  var obj = new Date();
  
  obj.foo = 10;
  
  assert(Object.isExtensible(obj));
  Object.seal(obj);
  
  verifyNotConfigurable(obj, "foo");
  assert.sameValue(obj.foo, 10);
  