1 | /* -*- C++ -*- |
---|
2 | * src/test/kruskal_test.cc - Part of LEMON, a generic C++ optimization library |
---|
3 | * |
---|
4 | * Copyright (C) 2005 Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport |
---|
5 | * (Egervary Research Group on Combinatorial Optimization, EGRES). |
---|
6 | * |
---|
7 | * Permission to use, modify and distribute this software is granted |
---|
8 | * provided that this copyright notice appears in all copies. For |
---|
9 | * precise terms see the accompanying LICENSE file. |
---|
10 | * |
---|
11 | * This software is provided "AS IS" with no warranty of any kind, |
---|
12 | * express or implied, and with no claim as to its suitability for any |
---|
13 | * purpose. |
---|
14 | * |
---|
15 | */ |
---|
16 | |
---|
17 | #include <iostream> |
---|
18 | #include <vector> |
---|
19 | |
---|
20 | #include "test_tools.h" |
---|
21 | #include <lemon/maps.h> |
---|
22 | #include <lemon/kruskal.h> |
---|
23 | #include <lemon/list_graph.h> |
---|
24 | #include <lemon/concept/maps.h> |
---|
25 | #include <lemon/concept/graph.h> |
---|
26 | |
---|
27 | |
---|
28 | using namespace std; |
---|
29 | using namespace lemon; |
---|
30 | |
---|
31 | void checkCompileKruskal() |
---|
32 | { |
---|
33 | concept::WriteMap<concept::StaticGraph::Edge,bool> w; |
---|
34 | |
---|
35 | kruskalEdgeMap(concept::StaticGraph(), |
---|
36 | concept::ReadMap<concept::StaticGraph::Edge,int>(), |
---|
37 | w); |
---|
38 | } |
---|
39 | |
---|
40 | int main() { |
---|
41 | |
---|
42 | typedef ListGraph::Node Node; |
---|
43 | typedef ListGraph::Edge Edge; |
---|
44 | typedef ListGraph::NodeIt NodeIt; |
---|
45 | typedef ListGraph::EdgeIt EdgeIt; |
---|
46 | |
---|
47 | ListGraph G; |
---|
48 | |
---|
49 | Node s=G.addNode(); |
---|
50 | Node v1=G.addNode(); |
---|
51 | Node v2=G.addNode(); |
---|
52 | Node v3=G.addNode(); |
---|
53 | Node v4=G.addNode(); |
---|
54 | Node t=G.addNode(); |
---|
55 | |
---|
56 | Edge e1 = G.addEdge(s, v1); |
---|
57 | Edge e2 = G.addEdge(s, v2); |
---|
58 | Edge e3 = G.addEdge(v1, v2); |
---|
59 | Edge e4 = G.addEdge(v2, v1); |
---|
60 | Edge e5 = G.addEdge(v1, v3); |
---|
61 | Edge e6 = G.addEdge(v3, v2); |
---|
62 | Edge e7 = G.addEdge(v2, v4); |
---|
63 | Edge e8 = G.addEdge(v4, v3); |
---|
64 | Edge e9 = G.addEdge(v3, t); |
---|
65 | Edge e10 = G.addEdge(v4, t); |
---|
66 | |
---|
67 | typedef ListGraph::EdgeMap<int> ECostMap; |
---|
68 | typedef ListGraph::EdgeMap<bool> EBoolMap; |
---|
69 | |
---|
70 | ECostMap edge_cost_map(G, 2); |
---|
71 | EBoolMap tree_map(G); |
---|
72 | |
---|
73 | |
---|
74 | //Test with const map. |
---|
75 | check(kruskalEdgeMap(G, ConstMap<ListGraph::Edge,int>(2), tree_map)==10, |
---|
76 | "Total cost should be 10"); |
---|
77 | //Test with a edge map (filled with uniform costs). |
---|
78 | check(kruskalEdgeMap(G, edge_cost_map, tree_map)==10, |
---|
79 | "Total cost should be 10"); |
---|
80 | |
---|
81 | edge_cost_map.set(e1, -10); |
---|
82 | edge_cost_map.set(e2, -9); |
---|
83 | edge_cost_map.set(e3, -8); |
---|
84 | edge_cost_map.set(e4, -7); |
---|
85 | edge_cost_map.set(e5, -6); |
---|
86 | edge_cost_map.set(e6, -5); |
---|
87 | edge_cost_map.set(e7, -4); |
---|
88 | edge_cost_map.set(e8, -3); |
---|
89 | edge_cost_map.set(e9, -2); |
---|
90 | edge_cost_map.set(e10, -1); |
---|
91 | |
---|
92 | vector<Edge> tree_edge_vec; |
---|
93 | |
---|
94 | //Test with a edge map and inserter. |
---|
95 | check(kruskalEdgeMap_IteratorOut(G, edge_cost_map, |
---|
96 | back_inserter(tree_edge_vec)) |
---|
97 | ==-31, |
---|
98 | "Total cost should be -31."); |
---|
99 | |
---|
100 | tree_edge_vec.clear(); |
---|
101 | |
---|
102 | //The above test could also be coded like this: |
---|
103 | check(kruskal(G, |
---|
104 | makeKruskalMapInput(G, edge_cost_map), |
---|
105 | makeKruskalSequenceOutput(back_inserter(tree_edge_vec))) |
---|
106 | ==-31, |
---|
107 | "Total cost should be -31."); |
---|
108 | |
---|
109 | check(tree_edge_vec.size()==5,"The tree should have 5 edges."); |
---|
110 | |
---|
111 | check(tree_edge_vec[0]==e1 && |
---|
112 | tree_edge_vec[1]==e2 && |
---|
113 | tree_edge_vec[2]==e5 && |
---|
114 | tree_edge_vec[3]==e7 && |
---|
115 | tree_edge_vec[4]==e9, |
---|
116 | "Wrong tree."); |
---|
117 | |
---|
118 | return 0; |
---|
119 | } |
---|