1 /*
2 Copyright (c) Marshall Clow 2011-2012.
3
4 Distributed under the Boost Software License, Version 1.0. (See accompanying
5 file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
6
7 For more information, see http://www.boost.org
8 */
9
10 #include <iostream>
11
12 #include <boost/config.hpp>
13 #include <boost/algorithm/cxx11/partition_point.hpp>
14
15 #define BOOST_TEST_MAIN
16 #include <boost/test/unit_test.hpp>
17
18 #include <string>
19 #include <vector>
20 #include <list>
21
22 namespace ba = boost::algorithm;
23 // namespace ba = boost;
24
25 template <typename Container>
offset_to_iter(Container & v,int offset)26 typename Container::iterator offset_to_iter ( Container &v, int offset ) {
27 typename Container::iterator retval;
28
29 if ( offset >= 0 ) {
30 retval = v.begin ();
31 std::advance ( retval, offset );
32 }
33 else {
34 retval = v.end ();
35 std::advance ( retval, offset + 1 );
36 }
37 return retval;
38 }
39
40 template <typename Container, typename Predicate>
test_sequence(Container & v,Predicate comp,int expected)41 void test_sequence ( Container &v, Predicate comp, int expected ) {
42 typename Container::iterator res, exp;
43
44 res = ba::partition_point ( v.begin (), v.end (), comp );
45 exp = offset_to_iter ( v, expected );
46 BOOST_CHECK ( exp == res );
47
48 // Duplicate the last element; this checks for any even/odd problems
49 v.push_back ( * v.rbegin ());
50 res = ba::partition_point ( v.begin (), v.end (), comp );
51 exp = offset_to_iter ( v, expected );
52 BOOST_CHECK ( exp == res );
53
54 // Range based test
55 res = ba::partition_point ( v, comp );
56 exp = offset_to_iter ( v, expected );
57 BOOST_CHECK ( exp == res );
58 }
59
60 template <typename T>
61 struct less_than {
62 public:
less_thanless_than63 less_than ( T foo ) : val ( foo ) {}
less_thanless_than64 less_than ( const less_than &rhs ) : val ( rhs.val ) {}
65
operator ()less_than66 bool operator () ( const T &v ) const { return v < val; }
67 private:
68 less_than ();
69 less_than operator = ( const less_than &rhs );
70 T val;
71 };
72
73
test_sequence1()74 void test_sequence1 () {
75 std::vector<int> v;
76
77 v.clear ();
78 for ( int i = 5; i < 15; ++i )
79 v.push_back ( i );
80 test_sequence ( v, less_than<int>(3), 0 ); // no elements
81 test_sequence ( v, less_than<int>(6), 1 ); // only the first element
82 test_sequence ( v, less_than<int>(10), 5 );
83 test_sequence ( v, less_than<int>(99), -1 ); // all elements satisfy
84
85 // With bidirectional iterators.
86 std::list<int> l;
87 for ( int i = 5; i < 15; ++i )
88 l.push_back ( i );
89 test_sequence ( l, less_than<int>(3), 0 ); // no elements
90 test_sequence ( l, less_than<int>(6), 1 ); // only the first element
91 test_sequence ( l, less_than<int>(10), 5 );
92 test_sequence ( l, less_than<int>(99), -1 ); // all elements satisfy
93
94 }
95
96
BOOST_AUTO_TEST_CASE(test_main)97 BOOST_AUTO_TEST_CASE( test_main )
98 {
99 test_sequence1 ();
100 }
101