// -*- c++ -*-

#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