/* -*- C++ -*-

 * test/dfs_test.cc - 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.

 *

 */

#include "test_tools.h"

#include <lemon/smart_graph.h>

#include <lemon/dfs.h>

#include <lemon/path.h>

#include <lemon/concept/graph.h>

using namespace lemon;

const int PET_SIZE =5;

void check_Dfs_SmartGraph_Compile() 

{

  typedef concept::StaticGraph Graph;

  typedef Graph::Edge Edge;

  typedef Graph::Node Node;

  typedef Graph::EdgeIt EdgeIt;

  typedef Graph::NodeIt NodeIt;

  typedef Dfs<Graph> DType;

  Graph G;

  Node n;

  Edge e;

  int l;

  bool b;

  DType::DistMap d(G);

  DType::PredMap p(G);

  //  DType::PredNodeMap pn(G);

  DType dfs_test(G);

  dfs_test.run(n);

  l  = dfs_test.dist(n);

  e  = dfs_test.pred(n);

  n  = dfs_test.predNode(n);

  d  = dfs_test.distMap();

  p  = dfs_test.predMap();

  //  pn = dfs_test.predNodeMap();

  b  = dfs_test.reached(n);

  DirPath<Graph> pp(G);

  dfs_test.getPath(pp,n);

}

void check_Dfs_Function_Compile() 

{

  typedef int VType;

  typedef concept::StaticGraph Graph;

  typedef Graph::Edge Edge;

  typedef Graph::Node Node;

  typedef Graph::EdgeIt EdgeIt;

  typedef Graph::NodeIt NodeIt;

  typedef concept::ReadMap<Edge,VType> LengthMap;

  dfs(Graph(),Node()).run();

  dfs(Graph()).source(Node()).run();

  dfs(Graph())

    .predMap(concept::WriteMap<Node,Edge>())

    .distMap(concept::WriteMap<Node,VType>())

    .reachedMap(concept::ReadWriteMap<Node,bool>())

    .processedMap(concept::WriteMap<Node,bool>())

    .run(Node());

}

int main()

{

  typedef SmartGraph Graph;

  typedef Graph::Edge Edge;

  typedef Graph::Node Node;

  typedef Graph::EdgeIt EdgeIt;

  typedef Graph::NodeIt NodeIt;

  typedef Graph::EdgeMap<int> LengthMap;

  Graph G;

  Node s, t;

  PetStruct<Graph> ps = addPetersen(G,PET_SIZE);

  s=ps.outer[2];

  t=ps.inner[0];

  Dfs<Graph> dfs_test(G);

  dfs_test.run(s);  

  DirPath<Graph> p(G);

  check(dfs_test.getPath(p,t),"getPath() failed to set the path.");

  check(p.length()==dfs_test.dist(t),"getPath() found a wrong path.");

  for(NodeIt v(G); v!=INVALID; ++v) {

    check(dfs_test.reached(v),"Each node should be reached.");

    if ( dfs_test.pred(v)!=INVALID ) {

      Edge e=dfs_test.pred(v);

      Node u=G.source(e);

      check(u==dfs_test.predNode(v),"Wrong tree.");

      check(dfs_test.dist(v) - dfs_test.dist(u) == 1,

	    "Wrong distance. (" << dfs_test.dist(u) << "->" 

	    <<dfs_test.dist(v) << ')');

    }

  }

}