BiconnectivityInspectorTest.java

/* ==========================================
 * 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 program and the accompanying materials are dual-licensed under
 * either
 *
 * (a) the terms of the GNU Lesser General Public License version 2.1
 * as published by the Free Software Foundation, or (at your option) any
 * later version.
 *
 * or (per the licensee's choosing)
 *
 * (b) the terms of the Eclipse Public License v1.0 as published by
 * the Eclipse Foundation.
 */
/* -------------------------
 * BiconnectivityInspectorTest.java
 * -------------------------
 * (C) Copyright 2007-2008, by France Telecom
 *
 * Original Author:  Guillaume Boulmier and Contributors.
 *
 * $Id$
 *
 * Changes
 * -------
 * 05-Jun-2007 : Initial revision (GB);
 *
 */
package org.jgrapht.alg;

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 BiconnectivityInspectorTest
    extends TestCase
{
    //~ Methods ----------------------------------------------------------------

    public void testBiconnected()
    {
        BiconnectedGraph graph = new BiconnectedGraph();

        BiconnectivityInspector inspector = new BiconnectivityInspector(graph);

        assertTrue(inspector.isBiconnected());
        assertEquals(0, inspector.getCutpoints().size());
        assertEquals(1, inspector.getBiconnectedVertexComponents().size());
    }

    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);

        BiconnectivityInspector inspector = new BiconnectivityInspector(graph);

        assertEquals(nbVertices - 2, inspector.getCutpoints().size());
        assertEquals(
            nbVertices - 1,
            inspector.getBiconnectedVertexComponents().size());
    }

    public void testNotBiconnected()
    {
        NotBiconnectedGraph graph = new NotBiconnectedGraph();

        BiconnectivityInspector inspector = new BiconnectivityInspector(graph);

        assertEquals(2, inspector.getCutpoints().size());
        assertEquals(3, inspector.getBiconnectedVertexComponents().size());
    }
}

// End BiconnectivityInspectorTest.java