1 | // (C) Copyright Gennadiy Rozental 2001. |
2 | // Distributed under the Boost Software License, Version 1.0. |
3 | // (See accompanying file LICENSE_1_0.txt or copy at |
4 | // http://www.boost.org/LICENSE_1_0.txt) |
5 | |
6 | // See http://www.boost.org/libs/test for the library home page. |
7 | // |
8 | /// @file |
9 | /// Defines fixture interface and object makers |
10 | // *************************************************************************** |
11 | |
12 | #ifndef BOOST_TEST_TREE_FIXTURE_HPP_100311GER |
13 | #define BOOST_TEST_TREE_FIXTURE_HPP_100311GER |
14 | |
15 | // Boost.Test |
16 | #include <boost/test/detail/config.hpp> |
17 | |
18 | // Boost |
19 | #include <boost/shared_ptr.hpp> |
20 | #include <boost/scoped_ptr.hpp> |
21 | #include <boost/function/function0.hpp> |
22 | #include <boost/utility/declval.hpp> |
23 | |
24 | #include <boost/test/detail/suppress_warnings.hpp> |
25 | |
26 | //____________________________________________________________________________// |
27 | |
28 | namespace boost { |
29 | namespace unit_test { |
30 | |
31 | // ************************************************************************** // |
32 | // ************** test_unit_fixture ************** // |
33 | // ************************************************************************** // |
34 | |
35 | class BOOST_TEST_DECL test_unit_fixture { |
36 | public: |
37 | virtual ~test_unit_fixture() {} |
38 | |
39 | // Fixture interface |
40 | virtual void setup() = 0; |
41 | virtual void teardown() = 0; |
42 | }; |
43 | |
44 | typedef shared_ptr<test_unit_fixture> test_unit_fixture_ptr; |
45 | |
46 | // ************************************************************************** // |
47 | // ************** fixture helper functions ************** // |
48 | // ************************************************************************** // |
49 | |
50 | namespace impl_fixture { |
51 | |
52 | #if defined(BOOST_NO_CXX11_DECLTYPE) || defined(BOOST_NO_CXX11_TRAILING_RESULT_TYPES) |
53 | |
54 | template<typename U, void (U::*)()> struct fixture_detect {}; |
55 | |
56 | template<typename T> |
57 | struct has_setup { |
58 | private: |
59 | template<typename U> static char Test(fixture_detect<U, &U::setup>*); |
60 | template<typename U> static int Test(...); |
61 | public: |
62 | static const bool value = sizeof(Test<T>(0)) == sizeof(char); |
63 | }; |
64 | |
65 | template<typename T> |
66 | struct has_teardown { |
67 | private: |
68 | template<typename U> static char Test(fixture_detect<U, &U::teardown>*); |
69 | template<typename U> static int Test(...); |
70 | public: |
71 | static const bool value = sizeof(Test<T>(0)) == sizeof(char); |
72 | }; |
73 | |
74 | #else |
75 | |
76 | template<typename U> struct fixture_detect { typedef char type; }; |
77 | template<typename T> |
78 | struct has_setup { |
79 | private: |
80 | template<typename U> static auto Test(U*) -> typename fixture_detect<decltype(boost::declval<U>().setup())>::type; |
81 | template<typename U> static int Test(...); |
82 | public: |
83 | static const bool value = sizeof(Test<T>(0)) == sizeof(char); |
84 | }; |
85 | |
86 | template<typename T> |
87 | struct has_teardown { |
88 | private: |
89 | template<typename U> static auto Test(U*) -> typename fixture_detect<decltype(boost::declval<U>().teardown())>::type; |
90 | template<typename U> static int Test(...); |
91 | public: |
92 | static const bool value = sizeof(Test<T>(0)) == sizeof(char); |
93 | }; |
94 | |
95 | #endif |
96 | |
97 | template <bool has_setup = false> |
98 | struct call_setup { template <class U> void operator()(U& ) { } }; |
99 | |
100 | template <> |
101 | struct call_setup<true> { template <class U> void operator()(U& u) { u.setup(); } }; |
102 | |
103 | template <bool has_teardown = false> |
104 | struct call_teardown { template <class U> void operator()(U& ) { } }; |
105 | |
106 | template <> |
107 | struct call_teardown<true> { template <class U> void operator()(U& u) { u.teardown(); } }; |
108 | } |
109 | |
110 | //! Calls the fixture "setup" if detected by the compiler, otherwise does nothing. |
111 | template <class U> |
112 | void setup_conditional(U& u) { |
113 | return impl_fixture::call_setup<impl_fixture::has_setup<U>::value>()(u); |
114 | } |
115 | |
116 | //! Calls the fixture "teardown" if detected by the compiler, otherwise does nothing. |
117 | template <class U> |
118 | void teardown_conditional(U& u) { |
119 | return impl_fixture::call_teardown<impl_fixture::has_teardown<U>::value>()(u); |
120 | } |
121 | |
122 | |
123 | // ************************************************************************** // |
124 | // ************** class_based_fixture ************** // |
125 | // ************************************************************************** // |
126 | |
127 | template<typename F, typename Arg=void> |
128 | class class_based_fixture : public test_unit_fixture { |
129 | public: |
130 | // Constructor |
131 | explicit class_based_fixture( Arg const& arg ) : m_inst(), m_arg( arg ) {} |
132 | |
133 | private: |
134 | // Fixture interface |
135 | void setup() BOOST_OVERRIDE { m_inst.reset( new F( m_arg ) ); setup_conditional(*m_inst); } |
136 | void teardown() BOOST_OVERRIDE { teardown_conditional(*m_inst); m_inst.reset(); } |
137 | |
138 | // Data members |
139 | scoped_ptr<F> m_inst; |
140 | Arg m_arg; |
141 | }; |
142 | |
143 | //____________________________________________________________________________// |
144 | |
145 | template<typename F> |
146 | class class_based_fixture<F,void> : public test_unit_fixture { |
147 | public: |
148 | // Constructor |
149 | class_based_fixture() : m_inst( 0 ) {} |
150 | |
151 | private: |
152 | // Fixture interface |
153 | void setup() BOOST_OVERRIDE { m_inst.reset( new F ); setup_conditional(*m_inst); } |
154 | void teardown() BOOST_OVERRIDE { teardown_conditional(*m_inst); m_inst.reset(); } |
155 | |
156 | // Data members |
157 | scoped_ptr<F> m_inst; |
158 | }; |
159 | |
160 | //____________________________________________________________________________// |
161 | |
162 | // ************************************************************************** // |
163 | // ************** function_based_fixture ************** // |
164 | // ************************************************************************** // |
165 | |
166 | class function_based_fixture : public test_unit_fixture { |
167 | public: |
168 | // Constructor |
169 | function_based_fixture( boost::function<void ()> const& setup_, boost::function<void ()> const& teardown_ ) |
170 | : m_setup( setup_ ) |
171 | , m_teardown( teardown_ ) |
172 | { |
173 | } |
174 | |
175 | private: |
176 | // Fixture interface |
177 | void setup() BOOST_OVERRIDE { if( m_setup ) m_setup(); } |
178 | void teardown() BOOST_OVERRIDE { if( m_teardown ) m_teardown(); } |
179 | |
180 | // Data members |
181 | boost::function<void ()> m_setup; |
182 | boost::function<void ()> m_teardown; |
183 | }; |
184 | |
185 | } // namespace unit_test |
186 | } // namespace boost |
187 | |
188 | #include <boost/test/detail/enable_warnings.hpp> |
189 | |
190 | #endif // BOOST_TEST_TREE_FIXTURE_HPP_100311GER |
191 | |
192 | |