defaultwinddatasettests.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.]
 *
 * ----------------------------
 * DefaultWindDatasetTests.java
 * ----------------------------
 * (C) Copyright 2006, 2007, by Object Refinery Limited and Contributors.
 *
 * Original Author:  David Gilbert (for Object Refinery Limited);
 * Contributor(s):   -;
 *
 * Changes
 * -------
 * 12-Jul-2006 : Version 1 (DG);
 * 
 */

package org.jfree.data.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.data.time.Day;
import org.jfree.data.time.RegularTimePeriod;
import org.jfree.data.xy.DefaultWindDataset;

/**
 * Tests for {@link DefaultWindDataset}.
 */
public class DefaultWindDatasetTests extends TestCase {

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

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

    /**
     * Confirm that the equals method can distinguish all the required fields.
     */
    public void testEquals() {
        DefaultWindDataset d1 = new DefaultWindDataset();
        DefaultWindDataset d2 = new DefaultWindDataset();
        assertTrue(d1.equals(d2));
        assertTrue(d2.equals(d1));
        
        d1 = createSampleDataset1();
        assertFalse(d1.equals(d2));
        d2 = createSampleDataset1();
        assertTrue(d1.equals(d2));
    }

    /**
     * Confirm that cloning works.
     */
    public void testCloning() {
        DefaultWindDataset d1 = new DefaultWindDataset();
        DefaultWindDataset d2 = null;
        try {
            d2 = (DefaultWindDataset) d1.clone();
        }
        catch (CloneNotSupportedException e) {
            e.printStackTrace();
        }
        assertTrue(d1 != d2);
        assertTrue(d1.getClass() == d2.getClass());
        assertTrue(d1.equals(d2));
        
        // try a dataset with some content...
        d1 = createSampleDataset1();
        d2 = null;
        try {
            d2 = (DefaultWindDataset) d1.clone();
        }
        catch (CloneNotSupportedException e) {
            e.printStackTrace();
        }
        assertTrue(d1 != d2);
        assertTrue(d1.getClass() == d2.getClass());
        assertTrue(d1.equals(d2));
    }

    /**
     * Serialize an instance, restore it, and check for equality.
     */
    public void testSerialization() {
        DefaultWindDataset d1 = new DefaultWindDataset();
        DefaultWindDataset 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 = (DefaultWindDataset) in.readObject();
            in.close();
        }
        catch (Exception e) {
            e.printStackTrace();
        }
        assertEquals(d1, d2);

        // try a dataset with some content...
        d1 = createSampleDataset1();
        try {
            ByteArrayOutputStream buffer = new ByteArrayOutputStream();
            ObjectOutput out = new ObjectOutputStream(buffer);
            out.writeObject(d1);
            out.close();

            ObjectInput in = new ObjectInputStream(new ByteArrayInputStream(
                    buffer.toByteArray()));
            d2 = (DefaultWindDataset) in.readObject();
            in.close();
        }
        catch (Exception e) {
            e.printStackTrace();
        }
        assertEquals(d1, d2);
        
    }
    
    /**
     * Some checks for the getSeriesKey(int) method.
     */
    public void testGetSeriesKey() {
        DefaultWindDataset d = createSampleDataset1();
        assertEquals("Series 1", d.getSeriesKey(0));
        assertEquals("Series 2", d.getSeriesKey(1));
        
        // check for series key out of bounds
        boolean pass = false;
        try {
            /*Comparable k =*/ d.getSeriesKey(-1);
        }
        catch (IllegalArgumentException e) {
            pass = true;
        }
        assertTrue(pass);
        
        pass = false;
        try {
            /*Comparable k =*/ d.getSeriesKey(2);
        }
        catch (IllegalArgumentException e) {
            pass = true;
        }
        assertTrue(pass);
    }
    
    /**
     * Some checks for the indexOf(Comparable) method.
     */
    public void testIndexOf() {
        DefaultWindDataset d = createSampleDataset1();
        assertEquals(0, d.indexOf("Series 1"));
        assertEquals(1, d.indexOf("Series 2"));
        assertEquals(-1, d.indexOf("Green Eggs and Ham"));
        assertEquals(-1, d.indexOf(null));
    }
    
    /**
     * Creates a sample dataset for testing.
     * 
     * @return A sample dataset.
     */
    public DefaultWindDataset createSampleDataset1() {
        Day t = new Day(1, 4, 2006);
        Object[] item1 = createItem(t, 3, 7);
        Object[] item2 = createItem(t.next(), 4, 8);
        Object[] item3 = createItem(t.next(), 5, 9);
        Object[][] series1 = new Object[][] {item1, item2, item3};
        Object[] item1b = createItem(t, 6, 10);
        Object[] item2b = createItem(t.next(), 7, 11);
        Object[] item3b = createItem(t.next(), 8, 12);
        Object[][] series2 = new Object[][] {item1b, item2b, item3b};
        Object[][][] data = new Object[][][] {series1, series2};
        return new DefaultWindDataset(data);
    }
    
    /**
     * Creates an array representing one item in a series.
     * 
     * @param t  the time period.
     * @param dir  the wind direction.
     * @param force  the wind force.
     * 
     * @return An array containing the specified items.
     */
    private Object[] createItem(RegularTimePeriod t, int dir, int force) {
        return new Object[] { new Long(t.getMiddleMillisecond()), 
                new Integer(dir), new Integer(force) };
    }
}