1 | #define BOOST_TEST_MODULE yen_ksp
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2 |
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3 | #include "yen_ksp.hpp"
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4 |
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5 | #include <boost/graph/adjacency_list.hpp>
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6 | #include <boost/graph/filtered_graph.hpp>
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7 | #include <boost/test/unit_test.hpp>
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8 |
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9 | #include <list>
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10 |
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11 | typedef
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12 | boost::adjacency_list<boost::vecS, boost::vecS, boost::bidirectionalS,
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13 | boost::no_property,
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14 | boost::property<boost::edge_weight_t, int> >
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15 | Graph;
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16 |
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17 | typedef Graph::edge_descriptor Edge;
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18 | typedef Graph::vertex_descriptor Vertex;
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19 | typedef std::list<Edge> Path;
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20 | typedef boost::exclude_filter<Edge> eef_type;
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21 |
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22 | using namespace std;
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23 |
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24 | // Add an edge, test it, and set weight.
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25 | Edge
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26 | ade(Graph &g, Vertex s, Vertex d, int w)
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27 | {
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28 | Edge e;
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29 | bool success;
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30 |
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31 | boost::tie(e, success) = add_edge(s, d, g);
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32 | assert(success);
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33 |
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34 | boost::get(boost::edge_weight, g, e) = w;
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35 |
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36 | return e;
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37 | }
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38 |
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39 | pair<Edge, Edge>
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40 | aue(Graph &g, Vertex s, Vertex d, int w)
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41 | {
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42 | return make_pair(ade(g, s, d, w), ade(g, d, s, w));
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43 | }
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44 |
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45 | bool
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46 | check_path(const std::list<std::pair<int, Path>> &r, int w, const Path &p)
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47 | {
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48 | for(auto const &ele: r)
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49 | if (ele.first == w && ele.second == p)
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50 | return true;
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51 |
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52 | return false;
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53 | }
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54 |
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55 | // a
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56 | // /|\
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57 | // 1 | 1 --1--
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58 | // / | \ / \
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59 | // b 2 c d
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60 | // \ | / \ /
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61 | // 2 | 1 --10--
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62 | // \|/
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63 | // e
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64 |
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65 | BOOST_AUTO_TEST_CASE(yen_ksp_test)
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66 | {
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67 | Graph g(5);
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68 |
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69 | // Vertexes
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70 | auto i = vertices(g).first;
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71 | Vertex a = *i++;
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72 | Vertex b = *i++;
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73 | Vertex c = *i++;
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74 | Vertex d = *i++;
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75 | Vertex e = *i;
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76 |
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77 | // Edges
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78 | Edge ab, ba;
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79 | Edge ae, ea;
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80 | Edge ac, ca;
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81 | Edge be, eb;
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82 | Edge cd1, dc1;
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83 | Edge cd2, dc2;
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84 | Edge ce, ec;
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85 |
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86 | tie(ab, ba) = aue(g, a, b, 1);
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87 | tie(ae, ea) = aue(g, a, e, 2);
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88 | tie(ac, ca) = aue(g, a, c, 1);
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89 | tie(be, eb) = aue(g, b, e, 2);
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90 | tie(cd1, dc1) = aue(g, c, d, 1);
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91 | tie(cd2, dc2) = aue(g, c, d, 10);
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92 | tie(ce, ec) = aue(g, c, e, 1);
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93 |
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94 | std::list<std::pair<int, Path>> r;
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95 |
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96 | r = boost::yen_ksp(g, b, d);
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97 |
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98 | BOOST_CHECK(check_path(r, 3, Path{ba, ac, cd1}));
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99 | BOOST_CHECK(check_path(r, 12, Path{ba, ac, cd2}));
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100 |
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101 | BOOST_CHECK(check_path(r, 4, Path{be, ec, cd1}));
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102 | BOOST_CHECK(check_path(r, 13, Path{be, ec, cd2}));
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103 |
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104 | BOOST_CHECK(check_path(r, 5, Path{ba, ae, ec, cd1}));
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105 | BOOST_CHECK(check_path(r, 14, Path{ba, ae, ec, cd2}));
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106 |
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107 | BOOST_CHECK(check_path(r, 6, Path{be, ea, ac, cd1}));
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108 | BOOST_CHECK(check_path(r, 15, Path{be, ea, ac, cd2}));
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109 | }
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