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Location: LEMON/LEMON-main/test/unionfind_test.cc

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alpar (Alpar Juttner)
Happy New Year again - update the copyright headers + run the source unifier
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/* -*- mode: C++; indent-tabs-mode: nil; -*-

 *

 * This file is a part of LEMON, a generic C++ optimization library.

 *

 * Copyright (C) 2003-2009

 * 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 <lemon/list_graph.h>

#include <lemon/maps.h>

#include <lemon/unionfind.h>

#include "test_tools.h"



using namespace lemon;

using namespace std;



typedef UnionFindEnum<ListGraph::NodeMap<int> > UFE;



int main() {

  ListGraph g;

  ListGraph::NodeMap<int> base(g);

  UFE U(base);

  vector<ListGraph::Node> n;



  for(int i=0;i<20;i++) n.push_back(g.addNode());



  U.insert(n[1]);

  U.insert(n[2]);



  check(U.join(n[1],n[2]) != -1, "Something is wrong with UnionFindEnum");



  U.insert(n[3]);

  U.insert(n[4]);

  U.insert(n[5]);

  U.insert(n[6]);

  U.insert(n[7]);





  check(U.join(n[1],n[4]) != -1, "Something is wrong with UnionFindEnum");

  check(U.join(n[2],n[4]) == -1, "Something is wrong with UnionFindEnum");

  check(U.join(n[3],n[5]) != -1, "Something is wrong with UnionFindEnum");





  U.insert(n[8],U.find(n[5]));





  check(U.size(U.find(n[4])) == 3, "Something is wrong with UnionFindEnum");

  check(U.size(U.find(n[5])) == 3, "Something is wrong with UnionFindEnum");

  check(U.size(U.find(n[6])) == 1, "Something is wrong with UnionFindEnum");

  check(U.size(U.find(n[2])) == 3, "Something is wrong with UnionFindEnum");





  U.insert(n[9]);

  U.insert(n[10],U.find(n[9]));





  check(U.join(n[8],n[10])  != -1, "Something is wrong with UnionFindEnum");





  check(U.size(U.find(n[4])) == 3, "Something is wrong with UnionFindEnum");

  check(U.size(U.find(n[9])) == 5, "Something is wrong with UnionFindEnum");



  check(U.size(U.find(n[8])) == 5, "Something is wrong with UnionFindEnum");



  U.erase(n[9]);

  U.erase(n[1]);



  check(U.size(U.find(n[10])) == 4, "Something is wrong with UnionFindEnum");

  check(U.size(U.find(n[2]))  == 2, "Something is wrong with UnionFindEnum");



  U.erase(n[6]);

  U.split(U.find(n[8]));





  check(U.size(U.find(n[4])) == 2, "Something is wrong with UnionFindEnum");

  check(U.size(U.find(n[3])) == 1, "Something is wrong with UnionFindEnum");

  check(U.size(U.find(n[2])) == 2, "Something is wrong with UnionFindEnum");





  check(U.join(n[3],n[4]) != -1, "Something is wrong with UnionFindEnum");

  check(U.join(n[2],n[4]) == -1, "Something is wrong with UnionFindEnum");





  check(U.size(U.find(n[4])) == 3, "Something is wrong with UnionFindEnum");

  check(U.size(U.find(n[3])) == 3, "Something is wrong with UnionFindEnum");

  check(U.size(U.find(n[2])) == 3, "Something is wrong with UnionFindEnum");



  U.eraseClass(U.find(n[4]));

  U.eraseClass(U.find(n[7]));



  return 0;

}