/* -*- C++ -*-

  * test/graph_utils_test.h - Part of LEMON, a generic C++ optimization library

  *

  * Copyright (C) 2005 Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport

  * (Egervary Research Group on Combinatorial Optimization, EGRES).

  *

  * Permission to use, modify and distribute this software is granted

  * provided that this copyright notice appears in all copies. For

  * precise terms see the accompanying LICENSE file.

  *

  * This software is provided "AS IS" with no warranty of any kind,

  * express or implied, and with no claim as to its suitability for any

  * purpose.

  *

  */

 #ifndef LEMON_TEST_GRAPH_UTILS_TEST_H

 #define LEMON_TEST_GRAPH_UTILS_TEST_H

 #include "test_tools.h"

 #include <cstdlib>

 #include <ctime>

 //! \ingroup misc

 //! \file

 //! \brief Test cases for graph utils.

 namespace lemon {

   template <typename Graph>

   void checkGraphCounters() {

     const int num = 5;

     Graph graph;

     addPetersen(graph, num);

     bidirGraph(graph);

     check(countNodes(graph) == 2*num, "Wrong node number.");

     check(countEdges(graph) == 6*num, "Wrong edge number.");    

     for (typename Graph::NodeIt it(graph); it != INVALID; ++it) {

       check(countOutEdges(graph, it) == 3, "Wrong out degree number.");

       check(countInEdges(graph, it) == 3, "Wrong in degree number.");

     }

   }

   template <typename Graph>

   void checkFindEdge() {

     typedef typename Graph::Node Node;

     typedef typename Graph::Edge Edge;

     typedef typename Graph::NodeIt NodeIt;

     typedef typename Graph::EdgeIt EdgeIt;

     Graph graph;

     srand(time(0));

     for (int i = 0; i < 10; ++i) {

       graph.addNode();

     }

     DescriptorMap<Graph, Node> nodes(graph);

     typename DescriptorMap<Graph, Node>::InverseMap invNodes(nodes);

     for (int i = 0; i < 100; ++i) {

       int src = (int)(rand() / (RAND_MAX + 1.0) * invNodes.size());

       int trg = (int)(rand() / (RAND_MAX + 1.0) * invNodes.size());

       graph.addEdge(invNodes[src], invNodes[trg]);

     }

     typename Graph::template EdgeMap<bool> found(graph, false);

     DescriptorMap<Graph, Edge> edges(graph);

     for (NodeIt src(graph); src != INVALID; ++src) {

       for (NodeIt trg(graph); trg != INVALID; ++trg) {

 	for (ConEdgeIt<Graph> con(graph, src, trg); con != INVALID; ++con) {

 	  check(graph.source(con) == src, "Wrong source.");

 	  check(graph.target(con) == trg, "Wrong target.");

 	  check(found[con] == false, "The edge found already.");

 	  found[con] = true;

 	}

       }

     }

     for (EdgeIt it(graph); it != INVALID; ++it) {

       check(found[it] == true, "The edge is not found.");

     }

   }

 } //namespace lemon

 #endif