/*
  TEST-SCOPE-INVALID.hpp  -  helper for placement scope and scope stack tests

  Copyright (C)         Lumiera.org
    2010,               Hermann Vosseler <Ichthyostega@web.de>

  This program is free software; you can redistribute it and/or
  modify it under the terms of the GNU General Public License as
  published by the Free Software Foundation; either version 2 of
  the License, or (at your option) any later version.

  This program is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  GNU General Public License for more details.

  You should have received a copy of the GNU General Public License
  along with this program; if not, write to the Free Software
  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

*/

/** @file test-scope-invalid.hpp
 ** Unit test helper to generate deliberately wrong placement scopes.
 ** Usable to cover error handling related to QueryFocus and ScopePath
 */


#ifndef MOBJECT_SESSION_TEST_SCOPE_INVALID_H
#define MOBJECT_SESSION_TEST_SCOPE_INVALID_H


#include "proc/mobject/placement.hpp"
#include "proc/mobject/session/scope.hpp"



namespace proc {
namespace mobject {
namespace session {
namespace test    {
  
  
  namespace { // nifty subversive test helper...
    
    Scope const&
    fabricate_invalidScope()
    {        /** 
              * assumed to have identical memory layout
              * to a Scope object, as the latter is implemented
              * by a PlacementRef, which in turn is just an
              * encapsulated Placement-ID
              */
             struct Ambush
               {
                 /** random ID assumed to be
                  *  nowhere in the model */
                 PlacementMO::ID derailed_;
               };
      
      static Ambush _shady_scope_;
      return *reinterpret_cast<Scope*> (&_shady_scope_);
    }
  }
  
  
  
}}}} // namespace proc::mobject::session::test
#endif