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/* ==========================================
* JGraphT : a free Java graph-theory library
* ==========================================
*
* Project Info: http://jgrapht.sourceforge.net/
* Project Creator: Barak Naveh (http://sourceforge.net/users/barak_naveh)
*
* (C) Copyright 2003-2008, by Barak Naveh and Contributors.
*
* This library is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2.1 of the License, or
* (at your option) any later version.
*
* This library is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
* License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this library; if not, write to the Free Software Foundation,
* Inc.,
* 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
*/
/* ------------------------------
* BronKerboschCliqueFinderTest.java
* ------------------------------
* (C) Copyright 2005-2008, by John V. Sichi and Contributors.
*
* Original Author: John V. Sichi
* Contributor(s): -
*
* $Id: BronKerboschCliqueFinderTest.java 645 2008-09-30 19:44:48Z perfecthash $
*
* Changes
* -------
* 26-July-2005 : Initial revision (JVS);
*
*/
package org.jgrapht.alg;
import java.util.*;
import junit.framework.*;
import org.jgrapht.*;
import org.jgrapht.graph.*;
/**
* .
*
* @author John V. Sichi
*/
public class BronKerboschCliqueFinderTest
extends TestCase
{
//~ Static fields/initializers ---------------------------------------------
private static final String V1 = "v1";
private static final String V2 = "v2";
private static final String V3 = "v3";
private static final String V4 = "v4";
private static final String V5 = "v5";
private static final String V6 = "v6";
private static final String V7 = "v7";
private static final String V8 = "v8";
//~ Methods ----------------------------------------------------------------
/**
* .
*
* @param g
*/
public void createGraph(Graph<String, DefaultEdge> g)
{
g.addVertex(V1);
g.addVertex(V2);
g.addVertex(V3);
g.addVertex(V4);
g.addVertex(V5);
g.addVertex(V6);
g.addVertex(V7);
g.addVertex(V8);
// biggest clique: { V1, V2, V3, V4 }
g.addEdge(V1, V2);
g.addEdge(V1, V3);
g.addEdge(V1, V4);
g.addEdge(V2, V3);
g.addEdge(V2, V4);
g.addEdge(V3, V4);
// smaller clique: { V5, V6, V7 }
g.addEdge(V5, V6);
g.addEdge(V5, V7);
g.addEdge(V6, V7);
// for fun, add an overlapping clique { V3, V4, V5 }
g.addEdge(V3, V5);
g.addEdge(V4, V5);
// make V8 less lonely
g.addEdge(V7, V8);
}
public void testFindBiggest()
{
SimpleGraph<String, DefaultEdge> g =
new SimpleGraph<String, DefaultEdge>(DefaultEdge.class);
createGraph(g);
BronKerboschCliqueFinder<String, DefaultEdge> finder =
new BronKerboschCliqueFinder<String, DefaultEdge>(g);
Collection<Set<String>> cliques = finder.getBiggestMaximalCliques();
assertEquals(1, cliques.size());
Set<String> expected = new HashSet<String>();
expected.add(V1);
expected.add(V2);
expected.add(V3);
expected.add(V4);
Set<String> actual = cliques.iterator().next();
assertEquals(expected, actual);
}
public void testFindAll()
{
SimpleGraph<String, DefaultEdge> g =
new SimpleGraph<String, DefaultEdge>(DefaultEdge.class);
createGraph(g);
BronKerboschCliqueFinder<String, DefaultEdge> finder =
new BronKerboschCliqueFinder<String, DefaultEdge>(g);
Collection<Set<String>> cliques = finder.getAllMaximalCliques();
assertEquals(4, cliques.size());
Set<Set<String>> expected = new HashSet<Set<String>>();
Set<String> set = new HashSet<String>();
set.add(V1);
set.add(V2);
set.add(V3);
set.add(V4);
expected.add(set);
set = new HashSet<String>();
set.add(V5);
set.add(V6);
set.add(V7);
expected.add(set);
set = new HashSet<String>();
set.add(V3);
set.add(V4);
set.add(V5);
expected.add(set);
set = new HashSet<String>();
set.add(V7);
set.add(V8);
expected.add(set);
// convert result from Collection to Set because we don't want
// order to be significant
Set<Set<String>> actual = new HashSet<Set<String>>(cliques);
assertEquals(expected, actual);
}
}
// End BronKerboschCliqueFinderTest.java
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