jfreechart example source code file (DefaultPieDatasetTests.java)

This example jfreechart source code file (DefaultPieDatasetTests.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - jfreechart tags/keywords

a, a, b, b, bytearrayoutputstream, bytearrayoutputstream, clonenotsupportedexception, defaultpiedataset, defaultpiedataset, defaultpiedatasettests, indexoutofboundsexception, integer, io, objectinput, xx

The jfreechart DefaultPieDatasetTests.java source code

/* ===========================================================
 * 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.]
 *
 * --------------------
 * PieDatasetTests.java
 * --------------------
 * (C) Copyright 2003-2007, by Object Refinery Limited and Contributors.
 *
 * Original Author:  David Gilbert (for Object Refinery Limited);
 * Contributor(s):   -;
 *
 * Changes
 * -------
 * 18-Aug-2003 : Version 1 (DG);
 * 31-Jul-2006 : Added test for new clear() method (DG);
 * 01-Aug-2006 : Added testGetKey() and testGetIndex() methods (DG);
 *
 */

package org.jfree.data.general.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.data.general.DatasetChangeEvent;
import org.jfree.data.general.DatasetChangeListener;
import org.jfree.data.general.DefaultPieDataset;

/**
 * Tests for the {@link org.jfree.data.general.PieDataset} class.
 */
public class DefaultPieDatasetTests extends TestCase
    implements DatasetChangeListener {

    private DatasetChangeEvent lastEvent;

    /**
     * Records the last event.
     *
     * @param event  the last event.
     */
    public void datasetChanged(DatasetChangeEvent event) {
        this.lastEvent = event;
    }

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

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

    /**
     * Some tests for the clear() method.
     */
    public void testClear() {
        DefaultPieDataset d = new DefaultPieDataset();
        d.addChangeListener(this);
        // no event is generated if the dataset is already empty
        d.clear();
        assertNull(this.lastEvent);
        d.setValue("A", 1.0);
        assertEquals(1, d.getItemCount());
        this.lastEvent = null;
        d.clear();
        assertNotNull(this.lastEvent);
        assertEquals(0, d.getItemCount());
    }

    /**
     * Some checks for the getKey(int) method.
     */
    public void testGetKey() {
        DefaultPieDataset d = new DefaultPieDataset();
        d.setValue("A", 1.0);
        d.setValue("B", 2.0);
        assertEquals("A", d.getKey(0));
        assertEquals("B", d.getKey(1));

        boolean pass = false;
        try {
            d.getKey(-1);
        }
        catch (IndexOutOfBoundsException e) {
            pass = true;
        }
        assertTrue(pass);

        pass = false;
        try {
            d.getKey(2);
        }
        catch (IndexOutOfBoundsException e) {
            pass = true;
        }
        assertTrue(pass);
    }

    /**
     * Some checks for the getIndex() method.
     */
    public void testGetIndex() {
        DefaultPieDataset d = new DefaultPieDataset();
        d.setValue("A", 1.0);
        d.setValue("B", 2.0);
        assertEquals(0, d.getIndex("A"));
        assertEquals(1, d.getIndex("B"));
        assertEquals(-1, d.getIndex("XX"));

        boolean pass = false;
        try {
            d.getIndex(null);
        }
        catch (IllegalArgumentException e) {
            pass = true;
        }
        assertTrue(pass);
    }

    /**
     * Confirm that cloning works.
     */
    public void testCloning() {
        DefaultPieDataset d1 = new DefaultPieDataset();
        d1.setValue("V1", new Integer(1));
        d1.setValue("V2", null);
        d1.setValue("V3", new Integer(3));
        DefaultPieDataset d2 = null;
        try {
            d2 = (DefaultPieDataset) d1.clone();
        }
        catch (CloneNotSupportedException e) {
            System.err.println("Failed to clone.");
        }
        assertTrue(d1 != d2);
        assertTrue(d1.getClass() == d2.getClass());
        assertTrue(d1.equals(d2));
    }

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

        DefaultPieDataset d1 = new DefaultPieDataset();
        d1.setValue("C1", new Double(234.2));
        d1.setValue("C2", null);
        d1.setValue("C3", new Double(345.9));
        d1.setValue("C4", new Double(452.7));

        DefaultPieDataset d2 = null;

        try {
            ByteArrayOutputStream buffer = new ByteArrayOutputStream();
            ObjectOutput out = new ObjectOutputStream(buffer);
            out.writeObject(d1);
            out.close();

            ObjectInput in = new ObjectInputStream(
                new ByteArrayInputStream(buffer.toByteArray())
            );
            d2 = (DefaultPieDataset) in.readObject();
            in.close();
        }
        catch (Exception e) {
            System.out.println(e.toString());
        }
        assertEquals(d1, d2);

    }

}