lumiera_/tests/components/common/singletontest.cpp
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2007-11-27 03:19:35 +01:00

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/*
Singleton(Test) - unittest for our Singleton template
Copyright (C) CinelerraCV
2007, 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 "common/testtargetobj.hpp"
#include "common/test/run.hpp"
#include "common/singleton.hpp"
#include "common/util.hpp"
#include "nobugcfg.h"
#include <boost/lexical_cast.hpp>
#include <boost/format.hpp>
#include <iostream>
using boost::lexical_cast;
using boost::format;
using util::isnil;
using std::string;
using std::cout;
namespace cinelerra
{
namespace test
{
/**
* Target object to be instantiated as Singleton
* Allocates a variable amount of additional heap memory
* and prints diagnostic messages.
*/
class TargetObj : public TestTargetObj
{
public:
static int cnt;
static void setCountParam (uint c) { TargetObj::cnt = c; }
protected:
TargetObj () : TestTargetObj(cnt) {}
friend class singleton::StaticCreate<TargetObj>;
friend class singleton::HeapCreate<TargetObj>;
};
int TargetObj::cnt = 0;
/*******************************************************************
* @test implement a Singleton class using our Singleton Template.
* Expected results: no memory leaks.
* @see cinelerra::Singleton
* @see cinelerra::singleton::StaticCreate
* @see cinelerra::singleton::HeapCreate
*/
class Singleton_test : public Test
{
typedef boost::function<TargetObj& ()> InstanceAccessFunc;
InstanceAccessFunc instance;
virtual void run(Arg arg)
{
uint num= isnil(arg)? 1 : lexical_cast<uint>(arg[1]);
testStaticallyAllocatedSingleton (num++);
testHeapAllocatedSingleton (num++);
}
/** @test parametrize the Singleton creation such as to create
* the single TargetObj instance as a static variable.
*/
void testStaticallyAllocatedSingleton (uint num)
{
SingletonFactory<TargetObj> single;
instance = single;
useInstance (num, "statically allocated");
}
/** @test parametrize the Singleton creation such as to create
* the single TargetObj instance allocated on the Heap
* and deleted automatically at application shutdown.
*/
void testHeapAllocatedSingleton (uint num)
{
SingletonFactory<TargetObj,singleton::HeapCreate> single;
instance = single;
useInstance (num, "heap allocated");
}
void useInstance (uint num, string kind)
{
cout << format("testing TargetObj(%d) as Singleton(%s)\n") % num % kind;
TargetObj::setCountParam(num);
TargetObj& t1 = instance();
TargetObj& t2 = instance();
ASSERT ( &t1 == &t2, "not a Singleton, got two different instances." );
cout << "calling a non-static method on the Singleton instance\n"
<< string (t1) << "\n";
}
};
/** Register this test class... */
LAUNCHER (Singleton_test, "unit common");
} // namespace test
} // namespace cinelerra