clusteredxybarrenderertests.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.]
 *
 * --------------------------------
 * ClusteredXYBarRendererTests.java
 * --------------------------------
 * (C) Copyright 2003-2007, by Object Refinery Limited and Contributors.
 *
 * Original Author:  David Gilbert (for Object Refinery Limited);
 * Contributor(s):   -;
 *
 * Changes
 * -------
 * 25-Mar-2003 : Version 1 (DG);
 * 22-Oct-2003 : Added hashCode test (DG);
 * 10-Jul-2007 : Fixed compile errors (DG);
 */

package org.jfree.chart.renderer.xy.junit;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.ObjectInput;
import java.io.ObjectInputStream;
import java.io.ObjectOutput;
import java.io.ObjectOutputStream;

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

import org.jfree.chart.renderer.xy.AbstractXYItemRenderer;
import org.jfree.chart.renderer.xy.ClusteredXYBarRenderer;
import org.jfree.data.Range;
import org.jfree.data.xy.DefaultIntervalXYDataset;
import org.jfree.data.xy.XYDataset;

/**
 * Tests for the {@link ClusteredXYBarRenderer} class.
 */
public class ClusteredXYBarRendererTests extends TestCase {

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

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

    /**
     * Check that the equals() method distinguishes all fields.
     */
    public void testEquals() {
        ClusteredXYBarRenderer r1 = new ClusteredXYBarRenderer();
        ClusteredXYBarRenderer r2 = new ClusteredXYBarRenderer();
        assertEquals(r1, r2);
        assertEquals(r2, r1);
        
        r1 = new ClusteredXYBarRenderer(1.2, false);
        assertFalse(r1.equals(r2));
        r2 = new ClusteredXYBarRenderer(1.2, false);
        assertTrue(r1.equals(r2));
        
        r1 = new ClusteredXYBarRenderer(1.2, true);
        assertFalse(r1.equals(r2));
        r2 = new ClusteredXYBarRenderer(1.2, true);
        assertTrue(r1.equals(r2));        
    }

    /**
     * Two objects that are equal are required to return the same hashCode. 
     */
    public void testHashcode() {
        ClusteredXYBarRenderer r1 = new ClusteredXYBarRenderer();
        ClusteredXYBarRenderer r2 = new ClusteredXYBarRenderer();
        assertTrue(r1.equals(r2));
        int h1 = r1.hashCode();
        int h2 = r2.hashCode();
        assertEquals(h1, h2);
    }
    
    /**
     * Confirm that cloning works.
     */
    public void testCloning() {
        ClusteredXYBarRenderer r1 = new ClusteredXYBarRenderer();
        ClusteredXYBarRenderer r2 = null;
        try {
            r2 = (ClusteredXYBarRenderer) r1.clone();
        }
        catch (CloneNotSupportedException e) {
            e.printStackTrace();
        }
        assertTrue(r1 != r2);
        assertTrue(r1.getClass() == r2.getClass());
        assertTrue(r1.equals(r2));
    }

    /**
     * Serialize an instance, restore it, and check for equality.
     */
    public void testSerialization() {

        ClusteredXYBarRenderer r1 = new ClusteredXYBarRenderer();
        ClusteredXYBarRenderer r2 = null;

        try {
            ByteArrayOutputStream buffer = new ByteArrayOutputStream();
            ObjectOutput out = new ObjectOutputStream(buffer);
            out.writeObject(r1);
            out.close();

            ObjectInput in = new ObjectInputStream(
                    new ByteArrayInputStream(buffer.toByteArray()));
            r2 = (ClusteredXYBarRenderer) in.readObject();
            in.close();
        }
        catch (Exception e) {
            e.printStackTrace();
        }
        assertEquals(r1, r2);

    }

    private static final double EPSILON = 0.0000000001;
    
    /**
     * Some checks for the findDomainBounds() method (which requires special
     * handling when the centerBarAtStartValue flag is set to true).
     */
    public void testFindDomainBounds() {
        AbstractXYItemRenderer renderer = new ClusteredXYBarRenderer();
        XYDataset dataset = createSampleDataset1();
        Range r = renderer.findDomainBounds(dataset);
        assertEquals(0.9, r.getLowerBound(), EPSILON);
        assertEquals(13.1, r.getUpperBound(), EPSILON);
        
        renderer = new ClusteredXYBarRenderer(0.0, true);
        r = renderer.findDomainBounds(dataset);
        assertEquals(0.8, r.getLowerBound(), EPSILON);
        assertEquals(13.0, r.getUpperBound(), EPSILON);
        
        // check that a null dataset returns null bounds
        assertTrue(renderer.findDomainBounds(null) == null);
    }    
    
    /**
     * Creates a sample dataset for testing.
     * 
     * @return A sample dataset.
     */
    public DefaultIntervalXYDataset createSampleDataset1() {
        DefaultIntervalXYDataset d = new DefaultIntervalXYDataset();
        double[] x1 = new double[] {1.0, 2.0, 3.0};
        double[] x1Start = new double[] {0.9, 1.9, 2.9};
        double[] x1End = new double[] {1.1, 2.1, 3.1};
        double[] y1 = new double[] {4.0, 5.0, 6.0};
        double[] y1Start = new double[] {1.09, 2.09, 3.09};
        double[] y1End = new double[] {1.11, 2.11, 3.11};
        double[][] data1 = new double[][] {x1, x1Start, x1End, y1, y1Start, 
                y1End};
        d.addSeries("S1", data1);
        
        double[] x2 = new double[] {11.0, 12.0, 13.0};
        double[] x2Start = new double[] {10.9, 11.9, 12.9};
        double[] x2End = new double[] {11.1, 12.1, 13.1};
        double[] y2 = new double[] {14.0, 15.0, 16.0};
        double[] y2Start = new double[] {11.09, 12.09, 13.09};
        double[] y2End = new double[] {11.11, 12.11, 13.11};
        double[][] data2 = new double[][] {x2, x2Start, x2End, y2, y2Start, 
                y2End};
        d.addSeries("S2", data2);
        return d;
    }

}