COIN-OR::LEMON - Graph Library

source: lemon-0.x/test/bfs_test.cc @ 1435:8e85e6bbefdf

Last change on this file since 1435:8e85e6bbefdf was 1435:8e85e6bbefdf, checked in by Akos Ladanyi, 15 years ago

trunk/src/* move to trunk/

File size: 3.1 KB
Line 
1/* -*- C++ -*-
2 * test/bfs_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 "test_tools.h"
18#include <lemon/smart_graph.h>
19#include <lemon/bfs.h>
20#include <lemon/path.h>
21#include<lemon/concept/graph.h>
22
23using namespace lemon;
24
25const int PET_SIZE =5;
26
27
28void check_Bfs_Compile()
29{
30  typedef concept::StaticGraph Graph;
31
32  typedef Graph::Edge Edge;
33  typedef Graph::Node Node;
34  typedef Graph::EdgeIt EdgeIt;
35  typedef Graph::NodeIt NodeIt;
36 
37  typedef Bfs<Graph> BType;
38 
39  Graph G;
40  Node n;
41  Edge e;
42  int l;
43  bool b;
44  BType::DistMap d(G);
45  BType::PredMap p(G);
46  //  BType::PredNodeMap pn(G);
47 
48  BType bfs_test(G);
49 
50  bfs_test.run(n);
51 
52  l  = bfs_test.dist(n);
53  e  = bfs_test.pred(n);
54  n  = bfs_test.predNode(n);
55  d  = bfs_test.distMap();
56  p  = bfs_test.predMap();
57  //  pn = bfs_test.predNodeMap();
58  b  = bfs_test.reached(n);
59
60  DirPath<Graph> pp(G);
61  bfs_test.getPath(pp,n);
62}
63
64void check_Bfs_Function_Compile()
65{
66  typedef int VType;
67  typedef concept::StaticGraph Graph;
68
69  typedef Graph::Edge Edge;
70  typedef Graph::Node Node;
71  typedef Graph::EdgeIt EdgeIt;
72  typedef Graph::NodeIt NodeIt;
73  typedef concept::ReadMap<Edge,VType> LengthMap;
74   
75  bfs(Graph(),Node()).run();
76  bfs(Graph()).source(Node()).run();
77  bfs(Graph())
78    .predMap(concept::WriteMap<Node,Edge>())
79    .distMap(concept::WriteMap<Node,VType>())
80    .reachedMap(concept::ReadWriteMap<Node,bool>())
81    .processedMap(concept::WriteMap<Node,bool>())
82    .run(Node());
83 
84}
85
86int main()
87{
88   
89  typedef SmartGraph Graph;
90
91  typedef Graph::Edge Edge;
92  typedef Graph::Node Node;
93  typedef Graph::EdgeIt EdgeIt;
94  typedef Graph::NodeIt NodeIt;
95  typedef Graph::EdgeMap<int> LengthMap;
96
97  Graph G;
98  Node s, t;
99  PetStruct<Graph> ps = addPetersen(G,PET_SIZE);
100   
101  s=ps.outer[2];
102  t=ps.inner[0];
103 
104  Bfs<Graph> bfs_test(G);
105  bfs_test.run(s);
106 
107  check(bfs_test.dist(t)==3,"Bfs found a wrong path. " << bfs_test.dist(t));
108
109  DirPath<Graph> p(G);
110  check(bfs_test.getPath(p,t),"getPath() failed to set the path.");
111  check(p.length()==3,"getPath() found a wrong path.");
112 
113
114  for(EdgeIt e(G); e==INVALID; ++e) {
115    Node u=G.source(e);
116    Node v=G.target(e);
117    check( !bfs_test.reached(u) ||
118           (bfs_test.dist(v) > bfs_test.dist(u)+1),
119           "Wrong output.");
120  }
121
122  for(NodeIt v(G); v==INVALID; ++v) {
123    check(bfs_test.reached(v),"Each node should be reached.");
124    if ( bfs_test.pred(v)!=INVALID ) {
125      Edge e=bfs_test.pred(v);
126      Node u=G.source(e);
127      check(u==bfs_test.predNode(v),"Wrong tree.");
128      check(bfs_test.dist(v) - bfs_test.dist(u) == 1,
129            "Wrong distance. Difference: "
130            << std::abs(bfs_test.dist(v) - bfs_test.dist(u)
131                        - 1));
132    }
133  }
134}
135
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