multifact-argument-test.cpp

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/*
  MultiFactArgument(Test)  -  passing additional invocation arguments to registered factory functions

  Copyright (C)         Lumiera.org
    2009,               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.

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

#include "lib/test/run.hpp"
#include "lib/test/test-helper.hpp"
#include "lib/format-cout.hpp"
#include "lib/multifact.hpp"

#include <functional>



namespace lib {
namespace test{
  
  using std::bind;
  using std::function;
  using std::placeholders::_1;
  using lib::test::showSizeof;
  
  
  
  namespace { // dummy fabrication function, creating wrapped numbers, controlled by an additional argument
    
    enum prodID
      { ONE = 1
      , TWO
      };
    
    struct Num { int n_; };
    
    Num*
    fabricateNumberz (int base, int offset)
    {
      cout << "fabricate("<<base<<", "<<offset<<")" << endl;
      Num* product = new Num;
      product->n_ = base*offset;
      return product;
    }
    
    
    typedef factory::MultiFact< Num(int)                    // nominal signature of fabrication
                              , prodID                     //  select factory function by prodID
                              , factory::BuildRefcountPtr //   wrapper: manage product by smart-ptr
                              > TestFactory;
    
    // for reference: type of an equivalent dispatcher table...
    typedef std::map<prodID, function<Num(int)> > DispatcherMap;
  }
  
  
  
  
  
  /***************************************************************/
  class MultiFactArgument_test : public Test
    {
      void
      run (Arg)
        {
          TestFactory theFact;
          theFact.defineProduction (ONE, bind (&fabricateNumberz, 1, _1 ));
          theFact.defineProduction (TWO, bind (&fabricateNumberz, 2, _1 ));
          
          cout << showSizeof (theFact) << endl;
          CHECK (sizeof(theFact) == sizeof(DispatcherMap));
          
          typedef TestFactory::Product PP;
          
          PP p1 = theFact(ONE, 2);
          PP p2 = theFact(TWO, 3);
          CHECK (1*2 == p1->n_);
          CHECK (2*3 == p2->n_);
        }
    };
  
  
  LAUNCHER (MultiFactArgument_test, "unit common");
  
  
  
}} // namespace lib::test