CompoundPermutationIterTest.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.
 */
/* -----------------
 * CompoundPermutationIterTest.java
 * -----------------
 * (C) Copyright 2005-2008, by Assaf Lehr and Contributors.
 *
 * Original Author:  Assaf Lehr
 * Contributor(s):   -
 *
 * $Id$
 *
 * Changes
 * -------
 */
package org.jgrapht.experimental.permutation;

import java.util.*;

import junit.framework.*;


/**
 * @author Assaf
 * @since May 30, 2005
 */
public class CompoundPermutationIterTest
    extends TestCase
{
    //~ Instance fields --------------------------------------------------------

    private CompoundPermutationIter complexPerm;

    //~ Methods ----------------------------------------------------------------

    /**
     * Asserts that the number of permutations is the same as getMax. It also
     * verifies that the number is the same when using different internal order
     * of the permutation components. Note: The prints and timer can be unmarked
     * to see performance results and the permutations array themselves.
     */
    public void testGetNext()
    {
        // System.out.println("testing complex perm {1,1,1,2,2,3,4,5} ");
        // StopperTimer timer = new StopperTimer();
        // timer.start();

        this.complexPerm =
            new CompoundPermutationIter(
                new int[] {
                    1,
                    1,
                    1,
                    2,
                    2,
                    3,
                    4,
                    5
                });
        int maxPermNum = this.complexPerm.getMax();

        // System.out.println(Arrays.toString(this.complexPerm.getPermAsArray()));
        int counter = 0;
        while (this.complexPerm.hasNext()) {
            int [] resultArray = this.complexPerm.getNext();

            if (false) {
                System.out.println(Arrays.toString(resultArray));
            }
            counter++;
        }

        // System.out.println(counter);
        assertEquals(maxPermNum, counter);

        // timer.stopAndReport();

        // timer.start();
        this.complexPerm =
            new CompoundPermutationIter(
                new int[] {
                    5,
                    4,
                    3,
                    2,
                    2,
                    1,
                    1,
                    1
                });

        // System.out.println("testing complex perm {5,4,3,2,2,1,1,1} ");
        // System.out.println(Arrays.toString(this.complexPerm.getPermAsArray()));
        counter = 0;
        while (this.complexPerm.hasNext()) {
            int [] resultArray = this.complexPerm.getNext();

            if (false) {
                System.out.println(Arrays.toString(resultArray));
            }
            counter++;
        }

        // System.out.println(counter);
        assertEquals(maxPermNum, counter);
        // timer.stopAndReport();
    }
}

// End CompoundPermutationIterTest.java