test/bfs_test.cc
author Alpar Juttner <alpar@cs.elte.hu>
Mon, 31 Mar 2008 10:06:47 +0100
changeset 120 137278093143
child 171 02f4d5d9bfd7
permissions -rw-r--r--
Fix a minor typo in the doc
     1 /* -*- C++ -*-
     2  *
     3  * This file is a part of LEMON, a generic C++ optimization library
     4  *
     5  * Copyright (C) 2003-2008
     6  * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport
     7  * (Egervary Research Group on Combinatorial Optimization, EGRES).
     8  *
     9  * Permission to use, modify and distribute this software is granted
    10  * provided that this copyright notice appears in all copies. For
    11  * precise terms see the accompanying LICENSE file.
    12  *
    13  * This software is provided "AS IS" with no warranty of any kind,
    14  * express or implied, and with no claim as to its suitability for any
    15  * purpose.
    16  *
    17  */
    18 
    19 #include "test_tools.h"
    20 //#include <lemon/smart_graph.h>
    21 #include <lemon/list_graph.h>
    22 #include <lemon/bfs.h>
    23 #include <lemon/path.h>
    24 #include<lemon/concepts/digraph.h>
    25 
    26 using namespace lemon;
    27 
    28 const int PET_SIZE =5;
    29 
    30 
    31 void check_Bfs_Compile() 
    32 {
    33   typedef concepts::Digraph Digraph;
    34 
    35   typedef Digraph::Arc Arc;
    36   typedef Digraph::Node Node;
    37   typedef Digraph::ArcIt ArcIt;
    38   typedef Digraph::NodeIt NodeIt;
    39  
    40   typedef Bfs<Digraph> BType;
    41   
    42   Digraph G;
    43   Node n;
    44   Arc e;
    45   int l;
    46   bool b;
    47   BType::DistMap d(G);
    48   BType::PredMap p(G);
    49   //  BType::PredNodeMap pn(G);
    50   
    51   BType bfs_test(G);
    52   
    53   bfs_test.run(n);
    54   
    55   l  = bfs_test.dist(n);
    56   e  = bfs_test.predArc(n);
    57   n  = bfs_test.predNode(n);
    58   d  = bfs_test.distMap();
    59   p  = bfs_test.predMap();
    60   //  pn = bfs_test.predNodeMap();
    61   b  = bfs_test.reached(n);
    62 
    63   Path<Digraph> pp = bfs_test.path(n);
    64 }
    65 
    66 void check_Bfs_Function_Compile() 
    67 {
    68   typedef int VType;
    69   typedef concepts::Digraph Digraph;
    70 
    71   typedef Digraph::Arc Arc;
    72   typedef Digraph::Node Node;
    73   typedef Digraph::ArcIt ArcIt;
    74   typedef Digraph::NodeIt NodeIt;
    75   typedef concepts::ReadMap<Arc,VType> LengthMap;
    76    
    77   Digraph g;
    78   bfs(g,Node()).run();
    79   bfs(g).source(Node()).run();
    80   bfs(g)
    81     .predMap(concepts::WriteMap<Node,Arc>())
    82     .distMap(concepts::WriteMap<Node,VType>())
    83     .reachedMap(concepts::ReadWriteMap<Node,bool>())
    84     .processedMap(concepts::WriteMap<Node,bool>())
    85     .run(Node());
    86   
    87 }
    88 
    89 int main()
    90 {
    91     
    92   // typedef SmartDigraph Digraph;
    93   typedef ListDigraph Digraph;
    94 
    95   typedef Digraph::Arc Arc;
    96   typedef Digraph::Node Node;
    97   typedef Digraph::ArcIt ArcIt;
    98   typedef Digraph::NodeIt NodeIt;
    99   typedef Digraph::ArcMap<int> LengthMap;
   100 
   101   Digraph G;
   102   Node s, t;
   103   PetStruct<Digraph> ps = addPetersen(G,PET_SIZE);
   104    
   105   s=ps.outer[2];
   106   t=ps.inner[0];
   107   
   108   Bfs<Digraph> bfs_test(G);
   109   bfs_test.run(s);
   110   
   111   check(bfs_test.dist(t)==3,"Bfs found a wrong path. " << bfs_test.dist(t));
   112 
   113   Path<Digraph> p = bfs_test.path(t);
   114   check(p.length()==3,"getPath() found a wrong path.");
   115   check(checkPath(G, p),"path() found a wrong path.");
   116   check(pathSource(G, p) == s,"path() found a wrong path.");
   117   check(pathTarget(G, p) == t,"path() found a wrong path.");
   118   
   119 
   120   for(ArcIt e(G); e==INVALID; ++e) {
   121     Node u=G.source(e);
   122     Node v=G.target(e);
   123     check( !bfs_test.reached(u) ||
   124 	   (bfs_test.dist(v) > bfs_test.dist(u)+1),
   125 	   "Wrong output.");
   126   }
   127 
   128   for(NodeIt v(G); v==INVALID; ++v) {
   129     check(bfs_test.reached(v),"Each node should be reached.");
   130     if ( bfs_test.predArc(v)!=INVALID ) {
   131       Arc e=bfs_test.predArc(v);
   132       Node u=G.source(e);
   133       check(u==bfs_test.predNode(v),"Wrong tree.");
   134       check(bfs_test.dist(v) - bfs_test.dist(u) == 1,
   135 	    "Wrong distance. Difference: " 
   136 	    << std::abs(bfs_test.dist(v) - bfs_test.dist(u) 
   137 			- 1));
   138     }
   139   }
   140 }
   141