/*
 * ActionSequenzTest.cpp
 *
 *  Created on: Dec 17, 2009
 *      Author: crueger
 */

#include <cppunit/CompilerOutputter.h>
#include <cppunit/extensions/TestFactoryRegistry.h>
#include <cppunit/ui/text/TestRunner.h>

#include "unittests/ActionSequenceTest.hpp"
#include "Actions/Action.hpp"
#include "Actions/ActionSequence.hpp"

// Registers the fixture into the 'registry'
CPPUNIT_TEST_SUITE_REGISTRATION( ActionSequenceTest );

void setUp();
void tearDown();

void canUndoTest();

/* some neccessary stubs for tests */
class canUndoActionStub : public Action
{
public:
  canUndoActionStub(){}
  virtual ~canUndoActionStub(){}

  virtual void call(){}
  virtual void undo(){}
  virtual bool canUndo(){
    return true;
  }
};

class cannotUndoActionStub : public Action
{
public:
  cannotUndoActionStub(){}
  virtual ~cannotUndoActionStub(){}

  virtual void call(){}
  virtual void undo(){}
  virtual bool canUndo(){
    return false;
  }
};

void ActionSequenceTest::setUp(){}
void ActionSequenceTest::tearDown(){}

void ActionSequenceTest::canUndoTest(){

  // create some necessary stubs used in this test
  Action *positive1 = new canUndoActionStub();
  Action *positive2 = new canUndoActionStub();
  Action *negative1 = new cannotUndoActionStub();
  Action *negative2 = new cannotUndoActionStub();

  // first section:
  {
    // test some combinations
    {
      ActionSequence *sequence = new ActionSequence();
      sequence->addAction(positive1);
      sequence->addAction(positive2);
      CPPUNIT_ASSERT_EQUAL( true, sequence->canUndo() );
      delete sequence;
    }
    {
      ActionSequence *sequence = new ActionSequence();
      sequence->addAction(positive1);
      sequence->addAction(negative2);
      CPPUNIT_ASSERT_EQUAL( false, sequence->canUndo() );
      delete sequence;
    }
    {
      ActionSequence *sequence = new ActionSequence();
      sequence->addAction(negative1);
      sequence->addAction(positive2);
      CPPUNIT_ASSERT_EQUAL( false, sequence->canUndo() );
      delete sequence;
    }
    {
      ActionSequence *sequence = new ActionSequence();
      sequence->addAction(negative1);
      sequence->addAction(negative2);
      CPPUNIT_ASSERT_EQUAL( false, sequence->canUndo() );
      delete sequence;
    }
  }

  // second section:
  {
    // empty sequence can be undone
    ActionSequence *sequence = new ActionSequence();
    CPPUNIT_ASSERT_EQUAL( true, sequence->canUndo() );
    // if only a positive action is contained it can be undone
    sequence->addAction(positive1);
    CPPUNIT_ASSERT_EQUAL( true, sequence->canUndo() );
    // the single negative action should block the process
    sequence->addAction(negative1);
    CPPUNIT_ASSERT_EQUAL( false, sequence->canUndo() );
    // after removing the negative action all is well again
    sequence->removeLastAction();
    CPPUNIT_ASSERT_EQUAL( true, sequence->canUndo() );
    delete sequence;
  }

  delete positive1;
  delete positive2;
  delete negative1;
  delete negative2;

}


/********************************************** Main routine **************************************/

int main(int argc, char **argv)
{
  // Get the top level suite from the registry
  CppUnit::Test *suite = CppUnit::TestFactoryRegistry::getRegistry().makeTest();

  // Adds the test to the list of test to run
  CppUnit::TextUi::TestRunner runner;
  runner.addTest( suite );

  // Change the default outputter to a compiler error format outputter
  runner.setOutputter( new CppUnit::CompilerOutputter( &runner.result(),
                                                       std::cerr ) );
  // Run the tests.
  bool wasSucessful = runner.run();

  // Return error code 1 if the one of test failed.
  return wasSucessful ? 0 : 1;
};