ClosestFirstIteratorTest.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.
 */
/* -----------------------------
 * ClosestFirstIteratorTest.java
 * -----------------------------
 * (C) Copyright 2003-2008, by John V. Sichi and Contributors.
 *
 * Original Author:  John V. Sichi
 * Contributor(s):   -
 *
 * $Id$
 *
 * Changes
 * -------
 * 03-Sep-2003 : Initial revision (JVS);
 * 29-May-2005 : Test radius support (JVS);
 *
 */
package org.jgrapht.traverse;

import org.jgrapht.*;
import org.jgrapht.graph.*;


/**
 * Tests for ClosestFirstIterator.
 *
 * @author John V. Sichi
 * @since Sep 3, 2003
 */
public class ClosestFirstIteratorTest
    extends AbstractGraphIteratorTest
{
    //~ Methods ----------------------------------------------------------------

    /**
     * .
     */
    public void testRadius()
    {
        result = new StringBuffer();

        DirectedGraph<String, DefaultEdge> graph = createDirectedGraph();

        // NOTE:  pick 301 as the radius because it discriminates
        // the boundary case edge between v7 and v9
        AbstractGraphIterator<String, ?> iterator =
            new ClosestFirstIterator<String, DefaultEdge>(graph, "1", 301);

        while (iterator.hasNext()) {
            result.append(iterator.next());

            if (iterator.hasNext()) {
                result.append(',');
            }
        }

        assertEquals("1,2,3,5,6,7", result.toString());
    }

    /**
     * .
     */
    public void testNoStart()
    {
        result = new StringBuffer();

        DirectedGraph<String, DefaultEdge> graph = createDirectedGraph();

        AbstractGraphIterator<String, ?> iterator =
            new ClosestFirstIterator<String, DefaultEdge>(graph);

        while (iterator.hasNext()) {
            result.append(iterator.next());

            if (iterator.hasNext()) {
                result.append(',');
            }
        }

        assertEquals("1,2,3,5,6,7,9,4,8,orphan", result.toString());
    }

    // NOTE:  the edge weights make the result deterministic
    String getExpectedStr1()
    {
        return "1,2,3,5,6,7,9,4,8";
    }

    String getExpectedStr2()
    {
        return getExpectedStr1() + ",orphan";
    }

    AbstractGraphIterator<String, DefaultEdge> createIterator(
        DirectedGraph<String, DefaultEdge> g,
        String vertex)
    {
        AbstractGraphIterator<String, DefaultEdge> i =
            new ClosestFirstIterator<String, DefaultEdge>(g, vertex);
        i.setCrossComponentTraversal(true);

        return i;
    }
}

// End ClosestFirstIteratorTest.java