1 // Copyright Neil Groves 2009. Use, modification and
2 // distribution is subject to the Boost Software License, Version
3 // 1.0. (See accompanying file LICENSE_1_0.txt or copy at
4 // http://www.boost.org/LICENSE_1_0.txt)
5 //
6 //
7 // For more information, see http://www.boost.org/libs/range/
8 //
9 #include <boost/range/algorithm/min_element.hpp>
10
11 #include <boost/test/test_tools.hpp>
12 #include <boost/test/unit_test.hpp>
13
14 #include <boost/assign.hpp>
15 #include <boost/range/iterator.hpp>
16 #include "../test_driver/range_return_test_driver.hpp"
17 #include <algorithm>
18 #include <functional>
19 #include <list>
20 #include <numeric>
21 #include <deque>
22 #include <vector>
23
24 namespace boost_range_test_algorithm_min_element
25 {
26 class min_element_test_policy
27 {
28 public:
29 template< class Container >
30 BOOST_DEDUCED_TYPENAME boost::range_iterator<Container>::type
test_iter(Container & cont)31 test_iter(Container& cont)
32 {
33 typedef BOOST_DEDUCED_TYPENAME boost::range_iterator<Container>::type iter_t;
34 iter_t result = boost::min_element(cont);
35 BOOST_CHECK( result == boost::min_element(boost::make_iterator_range(cont)) );
36 return result;
37 }
38
39 template< boost::range_return_value return_type >
40 struct test_range
41 {
42 template< class Container, class Policy >
43 BOOST_DEDUCED_TYPENAME boost::range_return<Container,return_type>::type
operator ()boost_range_test_algorithm_min_element::min_element_test_policy::test_range44 operator()(Policy&, Container& cont)
45 {
46 typedef BOOST_DEDUCED_TYPENAME boost::range_return<Container,return_type>::type result_t;
47 result_t result = boost::min_element<return_type>(cont);
48 BOOST_CHECK( result == boost::min_element<return_type>(boost::make_iterator_range(cont)) );
49 return result;
50 }
51 };
52
53 template< class Container >
54 BOOST_DEDUCED_TYPENAME boost::range_iterator<Container>::type
reference(Container & cont)55 reference(Container& cont)
56 {
57 return std::min_element(cont.begin(), cont.end());
58 }
59 };
60
61 template<class Pred>
62 class min_element_pred_test_policy
63 {
64 public:
65 template< class Container >
66 BOOST_DEDUCED_TYPENAME boost::range_iterator<Container>::type
test_iter(Container & cont)67 test_iter(Container& cont)
68 {
69 typedef BOOST_DEDUCED_TYPENAME boost::range_iterator<Container>::type iter_t;
70 iter_t result = boost::min_element(cont, Pred());
71 BOOST_CHECK( result == boost::min_element(
72 boost::make_iterator_range(cont), Pred()) );
73 return result;
74 }
75
pred() const76 Pred pred() const { return Pred(); }
77
78 template< boost::range_return_value return_type >
79 struct test_range
80 {
81 template< class Container, class Policy >
82 BOOST_DEDUCED_TYPENAME boost::range_return<Container,return_type>::type
operator ()boost_range_test_algorithm_min_element::min_element_pred_test_policy::test_range83 operator()(Policy& policy, Container& cont)
84 {
85 typedef BOOST_DEDUCED_TYPENAME boost::range_return<Container,return_type>::type result_t;
86 result_t result = boost::min_element<return_type>(cont, policy.pred());
87 BOOST_CHECK( result == boost::min_element<return_type>(
88 boost::make_iterator_range(cont), policy.pred()) );
89 return result;
90 }
91 };
92
93 template< class Container >
94 BOOST_DEDUCED_TYPENAME boost::range_iterator<Container>::type
reference(Container & cont)95 reference(Container& cont)
96 {
97 return std::min_element(cont.begin(), cont.end(), Pred());
98 }
99 };
100
101 template<class Container, class TestPolicy>
test_min_element_impl(TestPolicy policy)102 void test_min_element_impl(TestPolicy policy)
103 {
104 using namespace boost::assign;
105
106 typedef BOOST_DEDUCED_TYPENAME Container::value_type
107 value_t BOOST_RANGE_UNUSED;
108
109 typedef BOOST_DEDUCED_TYPENAME boost::remove_const<Container>::type
110 container_t;
111
112 boost::range_test::range_return_test_driver test_driver;
113
114 container_t cont;
115
116 test_driver(cont, policy);
117
118 cont.clear();
119 cont += 1;
120
121 test_driver(cont, policy);
122
123 cont.clear();
124 cont += 1,2,2,2,3,4,5,6,7,8,9;
125
126 test_driver(cont, policy);
127 }
128
129 template<class Container>
test_min_element_impl()130 void test_min_element_impl()
131 {
132 test_min_element_impl<Container>(min_element_test_policy());
133
134 test_min_element_impl<Container>(
135 min_element_pred_test_policy<std::less<int> >());
136
137 test_min_element_impl<Container>(
138 min_element_pred_test_policy<std::greater<int> >());
139 }
140
test_min_element()141 void test_min_element()
142 {
143 test_min_element_impl< const std::vector<int> >();
144 test_min_element_impl< const std::deque<int> >();
145 test_min_element_impl< const std::list<int> >();
146
147 test_min_element_impl< std::vector<int> >();
148 test_min_element_impl< std::deque<int> >();
149 test_min_element_impl< std::list<int> >();
150 }
151 }
152
153 boost::unit_test::test_suite*
init_unit_test_suite(int argc,char * argv[])154 init_unit_test_suite(int argc, char* argv[])
155 {
156 boost::unit_test::test_suite* test
157 = BOOST_TEST_SUITE( "RangeTestSuite.algorithm.min_element" );
158
159 test->add( BOOST_TEST_CASE( &boost_range_test_algorithm_min_element::test_min_element ) );
160
161 return test;
162 }
163