Ichthyostega
45ed4b4264
I prefer this approach, so I can ignore threadsafety for the moment and add it later just by switching policy
133 lines
3.6 KiB
C++
133 lines
3.6 KiB
C++
/*
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Singleton(Test) - unittest for our Singleton template
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Copyright (C) CinelerraCV
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2007, Christian Thaeter <ct@pipapo.org>
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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* *****************************************************/
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#include "common/testtargetobj.hpp"
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#include "common/test/run.hpp"
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#include "common/singleton.hpp"
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#include "common/util.hpp"
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#include "nobugcfg.h"
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#include <boost/lexical_cast.hpp>
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#include <iostream>
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using boost::lexical_cast;
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using util::isnil;
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using std::string;
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using std::cout;
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namespace cinelerra
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{
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namespace test
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{
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class ObjFactory;
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/**
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* Target object to be instantiated as Singleton
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* Allocates a variable amount of additional heap memory
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* and prints diagnostic messages.
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*/
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class TargetObj : public TestTargetObj
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{
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public:
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static int cnt = 0;
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static void setCountParam (uint c) { TargetObj::cnt = c; }
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protected:
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TargetObj () : TestTargetObj(cnt) {}
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};
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/*******************************************************************
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* @test implement a Singleton class using our Singleton Template.
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* Expected results: no memory leaks.
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* @see cinelerra::Singleton
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* @see cinelerra::singleton::Static
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* @see cinelerra::singleton::Heap
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*/
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class Singleton_test : public Test
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{
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typedef TargetObj& (*InstanceAccessFunc) (void);
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InstanceAccessFunc instance;
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virtual void run(Arg arg)
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{
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uint num= isnil(arg)? 1 : lexical_cast<uint>(arg[1]);
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TargetObj::setCountParam(num);
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testStaticallyAllocatedSingleton ();
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testHeapAllocatedSingleton ();
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}
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/** @test parametrize the Singleton creation such as to create
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* the single TargetObj instance as a static variable.
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*/
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void testStaticallyAllocatedSingleton ()
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{
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instance = &Singleton<TargetObj>::instance;
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useInstance ();
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}
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/** @test parametrize the Singleton creation such as to create
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* the single TargetObj instance allocated on the Heap
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* and deleted automatically at application shutdown.
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*/
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void testHeapAllocatedSingleton ()
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{
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instance = &Singleton<TargetObj,singleton::Heap>::instance;
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useInstance ();
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}
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void useInstance ()
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{
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TargetObj& t1 = instance();
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TargetObj& t2 = instance();
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ASSERT ( &t1 == &t2, "not a Singleton, got two different instances." );
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cout << "calling a non-static method on the Singleton instance\n"
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<< string (t1) << "\n";
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}
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};
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/** Register this test class... */
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LAUNCHER (Singleton_test, "unit common");
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} // namespace test
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} // namespace cinelerra
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