test/unionfind_test.cc
author Alpar Juttner <alpar@cs.elte.hu>
Thu, 03 Apr 2008 11:10:49 +0100
changeset 128 7cd965d2257f
parent 103 b68a7e348e00
child 171 02f4d5d9bfd7
permissions -rw-r--r--
Port graph_to_eps() and Color from svn -r3482.
     1 /* -*- C++ -*-
     2  *
     3  * This file is a part of LEMON, a generic C++ optimization library
     4  *
     5  * Copyright (C) 2003-2008
     6  * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport
     7  * (Egervary Research Group on Combinatorial Optimization, EGRES).
     8  *
     9  * Permission to use, modify and distribute this software is granted
    10  * provided that this copyright notice appears in all copies. For
    11  * precise terms see the accompanying LICENSE file.
    12  *
    13  * This software is provided "AS IS" with no warranty of any kind,
    14  * express or implied, and with no claim as to its suitability for any
    15  * purpose.
    16  *
    17  */
    18 
    19 #include <iostream>
    20 
    21 #include <lemon/list_graph.h>
    22 #include <lemon/maps.h>
    23 #include <lemon/unionfind.h>
    24 #include "test_tools.h"
    25 
    26 using namespace lemon;
    27 using namespace std;
    28 
    29 typedef UnionFindEnum<ListGraph::NodeMap<int> > UFE;
    30 
    31 int main() {
    32   ListGraph g;
    33   ListGraph::NodeMap<int> base(g);
    34   UFE U(base);
    35   vector<ListGraph::Node> n;
    36   
    37   for(int i=0;i<20;i++) n.push_back(g.addNode());
    38 
    39   U.insert(n[1]);
    40   U.insert(n[2]);
    41 
    42   check(U.join(n[1],n[2]) != -1,"Test failed.");
    43 
    44   U.insert(n[3]);
    45   U.insert(n[4]);
    46   U.insert(n[5]);
    47   U.insert(n[6]);
    48   U.insert(n[7]);
    49 
    50 
    51   check(U.join(n[1],n[4]) != -1,"Test failed.");
    52   check(U.join(n[2],n[4]) == -1,"Test failed.");
    53   check(U.join(n[3],n[5]) != -1,"Test failed.");
    54 
    55 
    56   U.insert(n[8],U.find(n[5]));
    57 
    58 
    59   check(U.size(U.find(n[4])) == 3,"Test failed.");
    60   check(U.size(U.find(n[5])) == 3,"Test failed.");
    61   check(U.size(U.find(n[6])) == 1,"Test failed.");
    62   check(U.size(U.find(n[2])) == 3,"Test failed.");
    63 
    64 
    65   U.insert(n[9]);
    66   U.insert(n[10],U.find(n[9]));
    67 
    68 
    69   check(U.join(n[8],n[10]) != -1,"Test failed.");
    70 
    71 
    72   check(U.size(U.find(n[4])) == 3,"Test failed.");
    73   check(U.size(U.find(n[9])) == 5,"Test failed.");
    74 
    75   check(U.size(U.find(n[8])) == 5,"Test failed.");
    76 
    77   U.erase(n[9]);
    78   U.erase(n[1]);
    79 
    80   check(U.size(U.find(n[10])) == 4,"Test failed.");
    81   check(U.size(U.find(n[2])) == 2,"Test failed.");
    82 
    83   U.erase(n[6]);
    84   U.split(U.find(n[8]));
    85 
    86 
    87   check(U.size(U.find(n[4])) == 2,"Test failed.");
    88   check(U.size(U.find(n[3])) == 1,"Test failed.");
    89   check(U.size(U.find(n[2])) == 2,"Test failed.");
    90 
    91 
    92   check(U.join(n[3],n[4]) != -1,"Test failed.");
    93   check(U.join(n[2],n[4]) == -1,"Test failed.");
    94 
    95 
    96   check(U.size(U.find(n[4])) == 3,"Test failed.");
    97   check(U.size(U.find(n[3])) == 3,"Test failed.");
    98   check(U.size(U.find(n[2])) == 3,"Test failed.");
    99 
   100   U.eraseClass(U.find(n[4]));
   101   U.eraseClass(U.find(n[7]));
   102 
   103   return 0;
   104 }