hashutilitiestests.java

JFreeChart是做统计图表的,、混合图、甘特图以及一些仪表盘

/* ===========================================================
 * JFreeChart : a free chart library for the Java(tm) platform
 * ===========================================================
 *
 * (C) Copyright 2000-2007, by Object Refinery Limited and Contributors.
 *
 * Project Info:  http://www.jfree.org/jfreechart/index.html
 *
 * 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., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, 
 * USA.  
 *
 * [Java is a trademark or registered trademark of Sun Microsystems, Inc. 
 * in the United States and other countries.]
 *
 * -----------------------
 * HashUtilitiesTests.java
 * -----------------------
 * (C) Copyright 2004-2007, by Object Refinery Limited and Contributors.
 *
 * Original Author:  David Gilbert (for Object Refinery Limited);
 * Contributor(s):   -;
 *
 * Changes
 * -------
 * 06-Mar-2007 : Version 1 (DG);
 *
 */

package org.jfree.chart.junit;

import junit.framework.Test;
import junit.framework.TestCase;
import junit.framework.TestSuite;

import org.jfree.chart.HashUtilities;

/**
 * Tests for the {@link HashUtilities} class.
 */
public class HashUtilitiesTests extends TestCase {

    /**
     * Returns the tests as a test suite.
     *
     * @return The test suite.
     */
    public static Test suite() {
        return new TestSuite(HashUtilitiesTests.class);
    }

    /**
     * Constructs a new set of tests.
     *
     * @param name  the name of the tests.
     */
    public HashUtilitiesTests(String name) {
        super(name);
    }

    /**
     * Some sanity checks for the hashCodeForDoubleArray() method.
     */
    public void testHashCodeForDoubleArray() {
        double[] a1 = new double[] { 1.0 };
        double[] a2 = new double[] { 1.0 };
        int h1 = HashUtilities.hashCodeForDoubleArray(a1);
        int h2 = HashUtilities.hashCodeForDoubleArray(a2);
        assertTrue(h1 == h2);
        
        double[] a3 = new double[] { 0.5, 1.0 };
        int h3 = HashUtilities.hashCodeForDoubleArray(a3);
        assertFalse(h1 == h3);
    }
}