defaultpiedatasettests.java

用于制作报表的中间件控件,纯java编写,还附带有数据库操作的源代码

/* ===========================================================
 * 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;
    
    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);

    }

}