test/digraph_test.h
author Balazs Dezso <deba@inf.elte.hu>
Sat, 31 May 2008 12:49:18 +0200
changeset 165 b4c336c27a03
parent 57 c1acf0018c0a
permissions -rw-r--r--
Undirected LGF IO
     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 #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