1 | /* -*- C++ -*- |
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2 | * src/test/dijkstra_test.cc - Part of LEMON, a generic C++ optimization library |
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3 | * |
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4 | * Copyright (C) 2004 Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport |
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5 | * (Egervary Combinatorial Optimization Research Group, EGRES). |
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6 | * |
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7 | * Permission to use, modify and distribute this software is granted |
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8 | * provided that this copyright notice appears in all copies. For |
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9 | * precise terms see the accompanying LICENSE file. |
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10 | * |
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11 | * This software is provided "AS IS" with no warranty of any kind, |
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12 | * express or implied, and with no claim as to its suitability for any |
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13 | * purpose. |
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14 | * |
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15 | */ |
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16 | |
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17 | #include "test_tools.h" |
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18 | #include <lemon/smart_graph.h> |
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19 | #include <lemon/dijkstra.h> |
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20 | #include <lemon/concept/graph.h> |
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21 | #include <lemon/concept/maps.h> |
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22 | using namespace lemon; |
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23 | |
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24 | const int PET_SIZE =5; |
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25 | |
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26 | |
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27 | void check_Dijkstra_BinHeap_Compile() |
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28 | { |
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29 | typedef int VType; |
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30 | typedef concept::StaticGraph Graph; |
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31 | |
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32 | typedef Graph::Edge Edge; |
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33 | typedef Graph::Node Node; |
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34 | typedef Graph::EdgeIt EdgeIt; |
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35 | typedef Graph::NodeIt NodeIt; |
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36 | typedef concept::ReadMap<Edge,VType> LengthMap; |
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37 | |
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38 | typedef Dijkstra<Graph, LengthMap> DType; |
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39 | |
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40 | Graph G; |
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41 | Node n; |
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42 | Edge e; |
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43 | VType l; |
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44 | bool b; |
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45 | DType::DistMap d(G); |
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46 | DType::PredMap p(G); |
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47 | DType::PredNodeMap pn(G); |
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48 | LengthMap cap; |
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49 | |
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50 | DType dijkstra_test(G,cap); |
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51 | |
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52 | dijkstra_test.run(n); |
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53 | |
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54 | l = dijkstra_test.dist(n); |
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55 | e = dijkstra_test.pred(n); |
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56 | n = dijkstra_test.predNode(n); |
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57 | d = dijkstra_test.distMap(); |
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58 | p = dijkstra_test.predMap(); |
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59 | pn = dijkstra_test.predNodeMap(); |
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60 | b = dijkstra_test.reached(n); |
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61 | |
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62 | } |
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63 | |
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64 | int main() |
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65 | { |
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66 | |
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67 | typedef SmartGraph Graph; |
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68 | |
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69 | typedef Graph::Edge Edge; |
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70 | typedef Graph::Node Node; |
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71 | typedef Graph::EdgeIt EdgeIt; |
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72 | typedef Graph::NodeIt NodeIt; |
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73 | typedef Graph::EdgeMap<int> LengthMap; |
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74 | |
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75 | Graph G; |
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76 | Node s, t; |
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77 | LengthMap cap(G); |
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78 | PetStruct<Graph> ps = addPetersen(G,PET_SIZE); |
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79 | |
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80 | for(int i=0;i<PET_SIZE;i++) { |
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81 | cap[ps.outcir[i]]=4; |
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82 | cap[ps.incir[i]]=1; |
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83 | cap[ps.chords[i]]=10; |
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84 | } |
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85 | s=ps.outer[0]; |
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86 | t=ps.inner[1]; |
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87 | |
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88 | Dijkstra<Graph, LengthMap> |
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89 | dijkstra_test(G, cap); |
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90 | dijkstra_test.run(s); |
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91 | |
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92 | check(dijkstra_test.dist(t)==13,"Dijkstra found a wrong path."); |
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93 | |
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94 | |
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95 | for(EdgeIt e(G); e!=INVALID; ++e) { |
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96 | Node u=G.source(e); |
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97 | Node v=G.target(e); |
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98 | check( !dijkstra_test.reached(u) || |
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99 | (dijkstra_test.dist(v) - dijkstra_test.dist(u) <= cap[e]), |
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100 | "dist(target)-dist(source)- edge_length= " |
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101 | << dijkstra_test.dist(v) - dijkstra_test.dist(u) |
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102 | - cap[e]); |
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103 | } |
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104 | |
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105 | ///\bug This works only for integer lengths |
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106 | for(NodeIt v(G); v!=INVALID; ++v){ |
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107 | check(dijkstra_test.reached(v),"Each node should be reached."); |
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108 | if ( dijkstra_test.pred(v)!=INVALID ) { |
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109 | Edge e=dijkstra_test.pred(v); |
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110 | Node u=G.source(e); |
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111 | check(u==dijkstra_test.predNode(v),"Wrong tree."); |
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112 | check(dijkstra_test.dist(v) - dijkstra_test.dist(u) == cap[e], |
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113 | "Wrong distance! Difference: " |
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114 | << std::abs(dijkstra_test.dist(v) - dijkstra_test.dist(u) |
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115 | - cap[e])); |
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116 | } |
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117 | } |
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118 | } |
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119 | |
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