1 // (C) Copyright Jeremy Siek 2002.
2 // Distributed under the Boost Software License, Version 1.0. (See
3 // accompanying file LICENSE_1_0.txt or copy at
4 // http://www.boost.org/LICENSE_1_0.txt)
5
6 #include <boost/pending/disjoint_sets.hpp>
7 #include <boost/core/lightweight_test.hpp>
8 #include <boost/cstdlib.hpp>
9
10 template < typename DisjointSet > struct test_disjoint_set
11 {
do_testtest_disjoint_set12 static void do_test()
13 {
14 // The following tests are pretty lame, just a basic sanity check.
15 // Industrial strength tests still need to be written.
16
17 #if !defined(__MWERKS__) || __MWERKS__ > 0x3003
18 std::size_t elts[]
19 #else
20 std::size_t elts[4]
21 #endif
22 = { 0, 1, 2, 3 };
23
24 const int N = sizeof(elts) / sizeof(*elts);
25
26 DisjointSet ds(N);
27
28 ds.make_set(elts[0]);
29 ds.make_set(elts[1]);
30 ds.make_set(elts[2]);
31 ds.make_set(elts[3]);
32
33 BOOST_TEST(ds.find_set(0) != ds.find_set(1));
34 BOOST_TEST(ds.find_set(0) != ds.find_set(2));
35 BOOST_TEST(ds.find_set(0) != ds.find_set(3));
36 BOOST_TEST(ds.find_set(1) != ds.find_set(2));
37 BOOST_TEST(ds.find_set(1) != ds.find_set(3));
38 BOOST_TEST(ds.find_set(2) != ds.find_set(3));
39
40 ds.union_set(0, 1);
41 ds.union_set(2, 3);
42 BOOST_TEST(ds.find_set(0) != ds.find_set(3));
43 int a = ds.find_set(0);
44 BOOST_TEST(a == ds.find_set(1));
45 int b = ds.find_set(2);
46 BOOST_TEST(b == ds.find_set(3));
47
48 ds.link(a, b);
49 BOOST_TEST(ds.find_set(a) == ds.find_set(b));
50 BOOST_TEST(1 == ds.count_sets(elts, elts + N));
51
52 ds.normalize_sets(elts, elts + N);
53 ds.compress_sets(elts, elts + N);
54 BOOST_TEST(1 == ds.count_sets(elts, elts + N));
55 }
56 };
57
main(int,char * [])58 int main(int, char*[])
59 {
60 using namespace boost;
61 {
62 typedef disjoint_sets_with_storage< identity_property_map,
63 identity_property_map, find_with_path_halving >
64 ds_type;
65 test_disjoint_set< ds_type >::do_test();
66 }
67 {
68 typedef disjoint_sets_with_storage< identity_property_map,
69 identity_property_map, find_with_full_path_compression >
70 ds_type;
71 test_disjoint_set< ds_type >::do_test();
72 }
73 return boost::report_errors();
74 }
75