michael@0: /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: //-----------------------------------------------------------------------------
michael@0: var BUGNUMBER = '53268';
michael@0: var status = 'Testing scope after changing obj.__proto__';
michael@0: var expect= '';
michael@0: var actual = '';
michael@0: var obj = {};
michael@0: const five = 5;
michael@0: 
michael@0: 
michael@0: //-----------------------------------------------------------------------------
michael@0: test();
michael@0: //-----------------------------------------------------------------------------
michael@0: 
michael@0: 
michael@0: function test()
michael@0: {
michael@0:   enterFunc ("test");
michael@0:   printBugNumber(BUGNUMBER);
michael@0:   printStatus (status);
michael@0: 
michael@0: 
michael@0:   status= 'Step 1:  setting obj.__proto__ = global object';
michael@0:   obj.__proto__ = this;
michael@0: 
michael@0:   actual = obj.five;
michael@0:   expect=5;
michael@0:   reportCompare (expect, actual, status);
michael@0: 
michael@0:   obj.five=1;
michael@0:   actual = obj.five;
michael@0:   expect=5;
michael@0:   reportCompare (expect, actual, status);
michael@0: 
michael@0: 
michael@0: 
michael@0:   status= 'Step 2:  setting obj.__proto__ = null';
michael@0:   obj.__proto__ = null;
michael@0: 
michael@0:   actual = obj.five;
michael@0:   expect=undefined;
michael@0:   reportCompare (expect, actual, status);
michael@0: 
michael@0:   obj.five=2;
michael@0:   actual = obj.five;
michael@0:   expect=2;
michael@0:   reportCompare (expect, actual, status);
michael@0: 
michael@0: 
michael@0:  
michael@0:   status= 'Step 3:  setting obj.__proto__  to global object again';
michael@0:   obj.__proto__ = this;
michael@0: 
michael@0:   actual = obj.five;
michael@0:   expect=2;  //<--- (FROM STEP 2 ABOVE)
michael@0:   reportCompare (expect, actual, status);
michael@0: 
michael@0:   obj.five=3;
michael@0:   actual = obj.five;
michael@0:   expect=3;
michael@0:   reportCompare (expect, actual, status);
michael@0: 
michael@0: 
michael@0: 
michael@0:   status= 'Step 4:  setting obj.__proto__   to  null again';
michael@0:   obj.__proto__ = null;
michael@0: 
michael@0:   actual = obj.five;
michael@0:   expect=3;  //<--- (FROM STEP 3 ABOVE)
michael@0:   reportCompare (expect, actual, status);
michael@0: 
michael@0:   obj.five=4;
michael@0:   actual = obj.five;
michael@0:   expect=4;
michael@0:   reportCompare (expect, actual, status);
michael@0: 
michael@0: 
michael@0:   exitFunc ("test");
michael@0: }