Ichthyostega
d6786870f3
all these tests are ported by drop-in replacement and should work afterwards exactly as before (and they do indeed) A minor twist was spotted though (nice to have more unit tests indeed!): Sometimes we want to pass a custom constructor *not* as modern-style lambda, but rather as direct function reference, function pointer or even member function pointer. However, we can not store those types into the closure for later lazy invocation. This is basically the same twist I run into yesterday, when modernising the thread-wrapper. And the solution is similar. Our traits class _Fun<FUN> has a new typedef Functor with a suitable functor type to be instantiated and copied. In case of the Lambda this is the (anonymous) lamda class itself, but in case of a function reference or pointer it is a std::function.
154 lines
4.4 KiB
C++
154 lines
4.4 KiB
C++
/*
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SingletonSubclass(Test) - actually creating a subclass of the Singleton Type
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Copyright (C) Lumiera.org
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2008, Hermann Vosseler <Ichthyostega@web.de>
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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
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the 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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/** @file singleton-subclass-test.cpp
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** unit test \ref SingletonSubclass_test
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*/
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#include "lib/test/run.hpp"
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#include "lib/test/test-helper.hpp"
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#include "lib/format-string.hpp"
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#include "lib/format-cout.hpp"
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#include "lib/util.hpp"
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#include "test-target-obj.hpp"
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#include "lib/depend2.hpp"
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#include "lib/depend-inject.hpp"
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#include <boost/lexical_cast.hpp>
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using boost::lexical_cast;
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using util::isSameObject;
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using util::_Fmt;
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using util::isnil;
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using std::string;
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namespace lib {
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namespace test{
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using lumiera::error::LUMIERA_ERROR_LIFECYCLE;
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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 Interface : public TestTargetObj
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{
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public:
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static int cnt;
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static void setCountParam (uint c) { Interface::cnt = c; }
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virtual string identify() { return "Interface"; }
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protected:
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Interface () : TestTargetObj(cnt) {}
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virtual ~Interface() {}
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friend class lib::InstanceHolder<Interface>;
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friend class std::default_delete<Interface>;
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};
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int Interface::cnt = 0;
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class Impl : public Interface
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{
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public:
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virtual string identify() { return "Implementation"; }
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};
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// for checking the safety.....
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class Impl_XXX : public Impl { };
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class Unrelated { };
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/***************************************************************//**
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* @test specific dependency-injection setup, to create a singleton
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* subclass (implementation class) instance, without coupling
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* the caller to the concrete type.
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* @remark Expected results: an instance of the subclass is created.
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* @see lib::Depend
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* @see lib/depend-inject.hpp
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*/
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class SingletonSubclass_test : public Test
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{
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virtual void
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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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cout << _Fmt("using the Singleton should create TargetObj(%d)...\n") % num;
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Interface::setCountParam(num);
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// configuration to use the subclass on demand
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DependInject<Interface>::useSingleton<Impl>();
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// define an instance of the Singleton factory as always...
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Depend<Interface> instance;
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// Now use the Singleton factory...
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// Note: we get the Base type
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Interface& t1 = instance();
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Interface& t2 = instance();
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CHECK (isSameObject (t1, t2), "not a Singleton, got two different instances." );
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CHECK ( INSTANCEOF (Impl,&t1)); // got the subclass as expected
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CHECK ("Implementation" == t2.identify());
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cout << "calling a non-static method on the Singleton-"
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<< t1.identify() << endl
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<< t1 << endl;
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verify_error_detection ();
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}
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void
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verify_error_detection ()
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{
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VERIFY_ERROR (LIFECYCLE, DependInject<Interface>::useSingleton<Impl_XXX>() );
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Depend<Interface> newFactory;
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CHECK ( INSTANCEOF (Impl, &newFactory() )); // works as before
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//////////does not compile due to incompatible baseclass
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// DependInject<Interface>::useSingleton<Unrelated>();
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}
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};
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/** Register this test class... */
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LAUNCHER (SingletonSubclass_test, "unit common");
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}} // namespace lib::test
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