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// (C) Copyright Gennadiy Rozental 2001.
// Distributed under the Boost Software License, Version 1.0.
// (See accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
// See http://www.boost.org/libs/test for the library home page.
//
/// @file
/// Defines fixture interface and object makers
// ***************************************************************************
#ifndef BOOST_TEST_TREE_FIXTURE_HPP_100311GER
#define BOOST_TEST_TREE_FIXTURE_HPP_100311GER
// Boost.Test
#include <boost/test/detail/config.hpp>
// Boost
#include <boost/shared_ptr.hpp>
#include <boost/scoped_ptr.hpp>
#include <boost/function/function0.hpp>
#include <boost/utility/declval.hpp>
#include <boost/test/detail/suppress_warnings.hpp>
//____________________________________________________________________________//
namespace boost {
namespace unit_test {
// ************************************************************************** //
// ************** test_unit_fixture ************** //
// ************************************************************************** //
class BOOST_TEST_DECL test_unit_fixture {
public:
virtual ~test_unit_fixture() {}
// Fixture interface
virtual void setup() = 0;
virtual void teardown() = 0;
};
typedef shared_ptr<test_unit_fixture> test_unit_fixture_ptr;
// ************************************************************************** //
// ************** fixture helper functions ************** //
// ************************************************************************** //
namespace impl_fixture {
#if defined(BOOST_NO_CXX11_DECLTYPE) || defined(BOOST_NO_CXX11_TRAILING_RESULT_TYPES)
template<typename U, void (U::*)()> struct fixture_detect {};
template<typename T>
struct has_setup {
private:
template<typename U> static char Test(fixture_detect<U, &U::setup>*);
template<typename U> static int Test(...);
public:
static const bool value = sizeof(Test<T>(0)) == sizeof(char);
};
template<typename T>
struct has_teardown {
private:
template<typename U> static char Test(fixture_detect<U, &U::teardown>*);
template<typename U> static int Test(...);
public:
static const bool value = sizeof(Test<T>(0)) == sizeof(char);
};
#else
template<typename U> struct fixture_detect { typedef char type; };
template<typename T>
struct has_setup {
private:
template<typename U> static auto Test(U*) -> typename fixture_detect<decltype(boost::declval<U>().setup())>::type;
template<typename U> static int Test(...);
public:
static const bool value = sizeof(Test<T>(0)) == sizeof(char);
};
template<typename T>
struct has_teardown {
private:
template<typename U> static auto Test(U*) -> typename fixture_detect<decltype(boost::declval<U>().teardown())>::type;
template<typename U> static int Test(...);
public:
static const bool value = sizeof(Test<T>(0)) == sizeof(char);
};
#endif
template <bool has_setup = false>
struct call_setup { template <class U> void operator()(U& ) { } };
template <>
struct call_setup<true> { template <class U> void operator()(U& u) { u.setup(); } };
template <bool has_teardown = false>
struct call_teardown { template <class U> void operator()(U& ) { } };
template <>
struct call_teardown<true> { template <class U> void operator()(U& u) { u.teardown(); } };
}
//! Calls the fixture "setup" if detected by the compiler, otherwise does nothing.
template <class U>
void setup_conditional(U& u) {
return impl_fixture::call_setup<impl_fixture::has_setup<U>::value>()(u);
}
//! Calls the fixture "teardown" if detected by the compiler, otherwise does nothing.
template <class U>
void teardown_conditional(U& u) {
return impl_fixture::call_teardown<impl_fixture::has_teardown<U>::value>()(u);
}
// ************************************************************************** //
// ************** class_based_fixture ************** //
// ************************************************************************** //
template<typename F, typename Arg=void>
class class_based_fixture : public test_unit_fixture {
public:
// Constructor
explicit class_based_fixture( Arg const& arg ) : m_inst(), m_arg( arg ) {}
private:
// Fixture interface
virtual void setup() { m_inst.reset( new F( m_arg ) ); setup_conditional(*m_inst); }
virtual void teardown() { teardown_conditional(*m_inst); m_inst.reset(); }
// Data members
scoped_ptr<F> m_inst;
Arg m_arg;
};
//____________________________________________________________________________//
template<typename F>
class class_based_fixture<F,void> : public test_unit_fixture {
public:
// Constructor
class_based_fixture() : m_inst( 0 ) {}
private:
// Fixture interface
virtual void setup() { m_inst.reset( new F ); setup_conditional(*m_inst); }
virtual void teardown() { teardown_conditional(*m_inst); m_inst.reset(); }
// Data members
scoped_ptr<F> m_inst;
};
//____________________________________________________________________________//
// ************************************************************************** //
// ************** function_based_fixture ************** //
// ************************************************************************** //
class function_based_fixture : public test_unit_fixture {
public:
// Constructor
function_based_fixture( boost::function<void ()> const& setup_, boost::function<void ()> const& teardown_ )
: m_setup( setup_ )
, m_teardown( teardown_ )
{
}
private:
// Fixture interface
virtual void setup() { if( m_setup ) m_setup(); }
virtual void teardown() { if( m_teardown ) m_teardown(); }
// Data members
boost::function<void ()> m_setup;
boost::function<void ()> m_teardown;
};
} // namespace unit_test
} // namespace boost
#include <boost/test/detail/enable_warnings.hpp>
#endif // BOOST_TEST_TREE_FIXTURE_HPP_100311GER
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