defaultohlcdatasettests.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.]
 *
 * ----------------------------
 * DefaultOHLCDatasetTests.java
 * ----------------------------
 * (C) Copyright 2005-2007, by Object Refinery Limited and Contributors.
 *
 * Original Author:  David Gilbert (for Object Refinery Limited);
 * Contributor(s):   -;
 *
 * Changes
 * -------
 * 29-Apr-2005 : Version 1 (DG);
 * 28-Nov-2006 : Extended equals() test (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 java.util.Date;

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

import org.jfree.data.Range;
import org.jfree.data.general.DatasetUtilities;
import org.jfree.data.xy.DefaultOHLCDataset;
import org.jfree.data.xy.OHLCDataItem;

/**
 * Tests for the {@link DefaultOHLCDataset} class.
 */
public class DefaultOHLCDatasetTests extends TestCase {

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

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

    private static final double EPSILON = 0.0000000001;
    
    /**
     * A small test for the data range calculated on this dataset.
     */
    public void testDataRange() {
        OHLCDataItem[] data = new OHLCDataItem[3];
        data[0] = new OHLCDataItem(new Date(11L), 2.0, 4.0, 1.0, 3.0, 100.0);
        data[1] = new OHLCDataItem(new Date(22L), 4.0, 9.0, 2.0, 5.0, 120.0);
        data[2] = new OHLCDataItem(new Date(33L), 3.0, 7.0, 3.0, 6.0, 140.0);
        DefaultOHLCDataset d = new DefaultOHLCDataset("S1", data);
        Range r = DatasetUtilities.findRangeBounds(d, false);
        assertEquals(1.0, r.getLowerBound(), EPSILON);
        assertEquals(9.0, r.getUpperBound(), EPSILON);
    }
    
    /**
     * Confirm that the equals method can distinguish all the required fields.
     */
    public void testEquals() {
        DefaultOHLCDataset d1 = new DefaultOHLCDataset("Series 1", 
                new OHLCDataItem[0]);
        DefaultOHLCDataset d2 = new DefaultOHLCDataset("Series 1", 
                new OHLCDataItem[0]);
        assertTrue(d1.equals(d2));
        assertTrue(d2.equals(d1));
        
        d1 = new DefaultOHLCDataset("Series 2", new OHLCDataItem[0]);
        assertFalse(d1.equals(d2));
        d2 = new DefaultOHLCDataset("Series 2", new OHLCDataItem[0]);
        assertTrue(d1.equals(d2));
        
        d1 = new DefaultOHLCDataset("Series 2", new OHLCDataItem[] {
                new OHLCDataItem(new Date(123L), 1.2, 3.4, 5.6, 7.8, 99.9)});
        assertFalse(d1.equals(d2));
        d2 = new DefaultOHLCDataset("Series 2", new OHLCDataItem[] {
                new OHLCDataItem(new Date(123L), 1.2, 3.4, 5.6, 7.8, 99.9)});
        assertTrue(d1.equals(d2));
        
        
    }

    /**
     * Confirm that cloning works.
     */
    public void testCloning() {
        DefaultOHLCDataset d1 = new DefaultOHLCDataset("Series 1", 
                new OHLCDataItem[0]);
        DefaultOHLCDataset d2 = null;
        try {
            d2 = (DefaultOHLCDataset) 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() {
        DefaultOHLCDataset d1 = new DefaultOHLCDataset("Series 1", 
                new OHLCDataItem[0]);
        DefaultOHLCDataset 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 = (DefaultOHLCDataset) in.readObject();
            in.close();
        }
        catch (Exception e) {
            System.out.println(e.toString());
        }
        assertEquals(d1, d2);
    }

}