#ifndef HUGO_TEST_TEST_TOOLS_H

 #define HUGO_TEST_TEST_TOOLS_H

 //! \ingroup misc

 //! \file

 //! \brief Some utility to write test programs.

 #include<iostream>

 #include<vector>

 ///If \c rc is fail, writes an error message end exit.

 ///If \c rc is fail, writes an error message end exit.

 ///The error message contains the file name and the line number of the

 ///source code in a standard from, which makes it possible to go there

 ///using good source browsers like e.g. \c emacs.

 ///

 ///For example

 ///\code check(0==1,"This is obviously false.");\endcode will

 ///print this (and then exits).

 ///\verbatim graph_test.cc:123: error: This is obviously false. \endverbatim

 ///

 ///\todo It should be in \c error.h

 #define check(rc, msg) \

   if(!(rc)) { \

     std::cerr << __FILE__ ":" << __LINE__ << ": error: " << msg << std::endl; \

     exit(1); \

   } else { } \

 ///Structure returned by \ref addPetersen().

 ///Structure returned by \ref addPetersen().

 ///

 template<class Graph> struct PetStruct

 {

   ///Vector containing the outer nodes.

   std::vector<typename Graph::Node> outer;

   ///Vector containing the inner nodes.

   std::vector<typename Graph::Node> inner;

   ///Vector containing the edges of the inner circle.

   std::vector<typename Graph::Edge> incir;

   ///Vector containing the edges of the outer circle.

   std::vector<typename Graph::Edge> outcir;

   ///Vector containing the chord edges.

   std::vector<typename Graph::Edge> chords;

 };

 ///Adds a Petersen graph to \c G.

 ///Adds a Petersen graph to \c G.

 ///\return The nodes end edges og the generated graph.

 template<typename Graph>

 PetStruct<Graph> addPetersen(Graph &G,int num=5)

 {

   PetStruct<Graph> n;

   for(int i=0;i<num;i++) {

     n.outer.push_back(G.addNode());

     n.inner.push_back(G.addNode());

   }

  for(int i=0;i<num;i++) {

    n.chords.push_back(G.addEdge(n.outer[i],n.inner[i]));

    n.outcir.push_back(G.addEdge(n.outer[i],n.outer[(i+1)%5]));

    n.incir.push_back(G.addEdge(n.inner[i],n.inner[(i+2)%5]));

   }

  return n;

 }

 #endif