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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.
*/
/* -------------------------
* BlockCutpointGraphTest.java
* -------------------------
* (C) Copyright 2007-2008, by France Telecom
*
* Original Author: Guillaume Boulmier and Contributors.
*
* $Id: BlockCutpointGraphTest.java 645 2008-09-30 19:44:48Z perfecthash $
*
* Changes
* -------
* 05-Jun-2007 : Initial revision (GB);
*
*/
package org.jgrapht.alg;
import java.util.*;
import junit.framework.*;
import org.jgrapht.*;
import org.jgrapht.generate.*;
import org.jgrapht.graph.*;
/**
* @author Guillaume Boulmier
* @since July 5, 2007
*/
@SuppressWarnings("unchecked")
public class BlockCutpointGraphTest
extends TestCase
{
//~ Methods ----------------------------------------------------------------
public void testBiconnected()
{
BiconnectedGraph graph = new BiconnectedGraph();
BlockCutpointGraph blockCutpointGraph = new BlockCutpointGraph(graph);
testGetBlock(blockCutpointGraph);
assertEquals(0, blockCutpointGraph.getCutpoints().size());
int nbBiconnectedComponents =
blockCutpointGraph.vertexSet().size()
- blockCutpointGraph.getCutpoints().size();
assertEquals(1, nbBiconnectedComponents);
}
public void testGetBlock(BlockCutpointGraph blockCutpointGraph)
{
for (
Iterator iter = blockCutpointGraph.vertexSet().iterator();
iter.hasNext();)
{
UndirectedGraph component = (UndirectedGraph) iter.next();
if (!component.edgeSet().isEmpty()) {
for (
Iterator iterator = component.vertexSet().iterator();
iterator.hasNext();)
{
Object vertex = iterator.next();
if (!blockCutpointGraph.getCutpoints().contains(vertex)) {
assertEquals(
component,
blockCutpointGraph.getBlock(vertex));
}
}
} else {
assertTrue(
blockCutpointGraph.getCutpoints().contains(
component.vertexSet().iterator().next()));
}
}
}
public void testLinearGraph()
{
testLinearGraph(3);
testLinearGraph(5);
}
public void testLinearGraph(int nbVertices)
{
UndirectedGraph graph = new SimpleGraph(DefaultEdge.class);
LinearGraphGenerator generator = new LinearGraphGenerator(nbVertices);
generator.generateGraph(
graph,
new ClassBasedVertexFactory<Object>(
Object.class),
null);
BlockCutpointGraph blockCutpointGraph = new BlockCutpointGraph(graph);
testGetBlock(blockCutpointGraph);
assertEquals(nbVertices - 2, blockCutpointGraph.getCutpoints().size());
int nbBiconnectedComponents =
blockCutpointGraph.vertexSet().size()
- blockCutpointGraph.getCutpoints().size();
assertEquals(nbVertices - 1, nbBiconnectedComponents);
}
public void testNotBiconnected()
{
UndirectedGraph graph = new NotBiconnectedGraph();
BlockCutpointGraph blockCutpointGraph = new BlockCutpointGraph(graph);
testGetBlock(blockCutpointGraph);
assertEquals(2, blockCutpointGraph.getCutpoints().size());
int nbBiconnectedComponents =
blockCutpointGraph.vertexSet().size()
- blockCutpointGraph.getCutpoints().size();
assertEquals(3, nbBiconnectedComponents);
}
}
// End BlockCutpointGraphTest.java
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