test/digraph_test.h
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     1 /* -*- C++ -*-
       
     2  *
       
     3  * This file is a part of LEMON, a generic C++ optimization library
       
     4  *
       
     5  * Copyright (C) 2003-2007
       
     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 #ifndef LEMON_TEST_GRAPH_TEST_H
       
    20 #define LEMON_TEST_GRAPH_TEST_H
       
    21 
       
    22 //#include <lemon/graph_utils.h>
       
    23 #include "test_tools.h"
       
    24 
       
    25 //! \ingroup misc
       
    26 //! \file
       
    27 //! \brief Some utility and test cases to test digraph classes.
       
    28 namespace lemon {
       
    29 
       
    30   ///Structure returned by \ref addPetersen().
       
    31 
       
    32   ///Structure returned by \ref addPetersen().
       
    33   ///
       
    34   template<class Digraph> 
       
    35   struct PetStruct
       
    36   {
       
    37     ///Vector containing the outer nodes.
       
    38     std::vector<typename Digraph::Node> outer;
       
    39     ///Vector containing the inner nodes.
       
    40     std::vector<typename Digraph::Node> inner;
       
    41     ///Vector containing the edges of the inner circle.
       
    42     std::vector<typename Digraph::Arc> incir;
       
    43     ///Vector containing the edges of the outer circle.
       
    44     std::vector<typename Digraph::Arc> outcir;
       
    45     ///Vector containing the chord edges.
       
    46     std::vector<typename Digraph::Arc> chords;
       
    47   };
       
    48 
       
    49 
       
    50 
       
    51   ///Adds a Petersen graph to \c G.
       
    52 
       
    53   ///Adds a Petersen graph to \c G.
       
    54   ///\return The nodes and edges of the generated graph.
       
    55 
       
    56   template<typename Digraph>
       
    57   PetStruct<Digraph> addPetersen(Digraph &G,int num = 5)
       
    58   {
       
    59     PetStruct<Digraph> n;
       
    60 
       
    61     for(int i=0;i<num;i++) {
       
    62       n.outer.push_back(G.addNode());
       
    63       n.inner.push_back(G.addNode());
       
    64     }
       
    65 
       
    66     for(int i=0;i<num;i++) {
       
    67       n.chords.push_back(G.addArc(n.outer[i],n.inner[i]));
       
    68       n.outcir.push_back(G.addArc(n.outer[i],n.outer[(i+1) % num]));
       
    69       n.incir.push_back(G.addArc(n.inner[i],n.inner[(i+2) % num]));
       
    70     }
       
    71     return n;
       
    72   }
       
    73 
       
    74   /// \brief Adds to the digraph the reverse pair of all edges.
       
    75   ///
       
    76   /// Adds to the digraph the reverse pair of all edges.
       
    77   ///
       
    78   template<class Digraph> 
       
    79   void bidirDigraph(Digraph &G)
       
    80   {
       
    81     typedef typename Digraph::Arc Arc;
       
    82     typedef typename Digraph::ArcIt ArcIt;
       
    83   
       
    84     std::vector<Arc> ee;
       
    85   
       
    86     for(ArcIt e(G);e!=INVALID;++e) ee.push_back(e);
       
    87 
       
    88     for(typename std::vector<Arc>::iterator p=ee.begin();p!=ee.end();p++)
       
    89       G.addArc(G.target(*p),G.source(*p));
       
    90   }
       
    91 
       
    92 
       
    93   /// \brief Checks the bidirectioned Petersen graph.
       
    94   ///
       
    95   ///  Checks the bidirectioned Petersen graph.
       
    96   ///
       
    97   template<class Digraph> 
       
    98   void checkBidirPetersen(Digraph &G, int num = 5)
       
    99   {
       
   100     typedef typename Digraph::Node Node;
       
   101 
       
   102     typedef typename Digraph::ArcIt ArcIt;
       
   103     typedef typename Digraph::NodeIt NodeIt;
       
   104 
       
   105     checkDigraphNodeList(G, 2 * num);
       
   106     checkDigraphArcList(G, 6 * num);
       
   107 
       
   108     for(NodeIt n(G);n!=INVALID;++n) {
       
   109       checkDigraphInArcList(G, n, 3);
       
   110       checkDigraphOutArcList(G, n, 3);
       
   111     }  
       
   112   }
       
   113 
       
   114   template<class Digraph> void checkDigraphNodeList(Digraph &G, int nn)
       
   115   {
       
   116     typename Digraph::NodeIt n(G);
       
   117     for(int i=0;i<nn;i++) {
       
   118       check(n!=INVALID,"Wrong Node list linking.");
       
   119       ++n;
       
   120     }
       
   121     check(n==INVALID,"Wrong Node list linking.");
       
   122   }
       
   123 
       
   124   template<class Digraph>
       
   125   void checkDigraphArcList(Digraph &G, int nn)
       
   126   {
       
   127     typedef typename Digraph::ArcIt ArcIt;
       
   128 
       
   129     ArcIt e(G);
       
   130     for(int i=0;i<nn;i++) {
       
   131       check(e!=INVALID,"Wrong Arc list linking.");
       
   132       ++e;
       
   133     }
       
   134     check(e==INVALID,"Wrong Arc list linking.");
       
   135   }
       
   136 
       
   137   template<class Digraph> 
       
   138   void checkDigraphOutArcList(Digraph &G, typename Digraph::Node n, int nn)
       
   139   {
       
   140     typename Digraph::OutArcIt e(G,n);
       
   141     for(int i=0;i<nn;i++) {
       
   142       check(e!=INVALID,"Wrong OutArc list linking.");
       
   143       check(n==G.source(e), "Wrong OutArc list linking.");
       
   144       ++e;
       
   145     }
       
   146     check(e==INVALID,"Wrong OutArc list linking.");
       
   147   }
       
   148 
       
   149   template<class Digraph> void 
       
   150   checkDigraphInArcList(Digraph &G, typename Digraph::Node n, int nn)
       
   151   {
       
   152     typename Digraph::InArcIt e(G,n);
       
   153     for(int i=0;i<nn;i++) {
       
   154       check(e!=INVALID,"Wrong InArc list linking.");
       
   155       check(n==G.target(e), "Wrong InArc list linking.");
       
   156       ++e;
       
   157     }
       
   158     check(e==INVALID,"Wrong InArc list linking.");
       
   159   }
       
   160 
       
   161   template <class Digraph> 
       
   162   void checkDigraph() {
       
   163     const int num = 5;
       
   164     Digraph G;
       
   165     addPetersen(G, num);
       
   166     bidirDigraph(G);
       
   167     checkBidirPetersen(G, num);
       
   168   }
       
   169 
       
   170   template <class Digraph> 
       
   171   void checkDigraphIterators(const Digraph& digraph) {
       
   172     typedef typename Digraph::Node Node;
       
   173     typedef typename Digraph::NodeIt NodeIt;
       
   174     typedef typename Digraph::Arc Arc;
       
   175     typedef typename Digraph::ArcIt ArcIt;
       
   176     typedef typename Digraph::InArcIt InArcIt;
       
   177     typedef typename Digraph::OutArcIt OutArcIt;
       
   178     //    typedef ConArcIt<Digraph> ConArcIt;
       
   179   }
       
   180 
       
   181   ///\file
       
   182   ///\todo Check target(), source() as well;
       
   183 
       
   184   
       
   185 } //namespace lemon
       
   186 
       
   187 
       
   188 #endif