/* -*- 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