timeseriescollectiontests.java

jfreechart安装程序和使用说明

/* ===========================================================
 * JFreeChart : a free chart library for the Java(tm) platform
 * ===========================================================
 *
 * (C) Copyright 2000-2004, 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., 59 Temple Place, Suite 330,
 * Boston, MA 02111-1307, USA.
 *
 * [Java is a trademark or registered trademark of Sun Microsystems, Inc. 
 * in the United States and other countries.]
 *
 * ------------------------------
 * TimeSeriesCollectionTests.java
 * ------------------------------
 * (C) Copyright 2003, by Object Refinery Limited.
 *
 * Original Author:  David Gilbert (for Object Refinery Limited);
 * Contributor(s):   -;
 *
 * $Id: TimeSeriesCollectionTests.java,v 1.1 2004/08/31 15:34:54 mungady Exp $
 *
 * Changes
 * -------
 * 01-May-2003 : Version 1 (DG);
 * 04-Dec-2003 : Added a test for the getSurroundingItems() method (DG);
 *
 */

package org.jfree.data.time.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.time.TimePeriodAnchor;
import org.jfree.data.time.TimeSeries;
import org.jfree.data.time.TimeSeriesCollection;

/**
 * A collection of test cases for the {@link TimeSeriesCollection} class.
 */
public class TimeSeriesCollectionTests extends TestCase {

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

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

    /**
     * Some tests for the equals() method.
     */
    public void testEquals() {

        final TimeSeriesCollection c1 = new TimeSeriesCollection();
        final TimeSeriesCollection c2 = new TimeSeriesCollection();

        final TimeSeries s1 = new TimeSeries("Series 1");
        final TimeSeries s2 = new TimeSeries("Series 2");

        // newly created collections should be equal
        final boolean b1 = c1.equals(c2);
        assertTrue("b1", b1);

        // add series to collection 1, should be not equal
        c1.addSeries(s1);
        c1.addSeries(s2);
        final boolean b2 = c1.equals(c2);
        assertFalse("b2", b2);

        // now add the same series to collection 2 to make them equal again...
        c2.addSeries(s1);
        c2.addSeries(s2);
        final boolean b3 = c1.equals(c2);
        assertTrue("b3", b3);

        // now remove series 2 from collection 2
        c2.removeSeries(s2);
        final boolean b4 = c1.equals(c2);
        assertFalse("b4", b4);

        // now remove series 2 from collection 1 to make them equal again
        c1.removeSeries(s2);
        final boolean b5 = c1.equals(c2);
        assertTrue("b5", b5);
    }

    /**
     * Tests the remove series method.
     */
    public void testRemoveSeries() {

        final TimeSeriesCollection c1 = new TimeSeriesCollection();

        final TimeSeries s1 = new TimeSeries("Series 1");
        final TimeSeries s2 = new TimeSeries("Series 2");
        final TimeSeries s3 = new TimeSeries("Series 3");
        final TimeSeries s4 = new TimeSeries("Series 4");

        c1.addSeries(s1);
        c1.addSeries(s2);
        c1.addSeries(s3);
        c1.addSeries(s4);

        c1.removeSeries(s3);

        final TimeSeries s = c1.getSeries(2);
        final boolean b1 = s.equals(s4);
        assertTrue(b1);

    }
    
    /**
     * Test the getSurroundingItems() method to ensure it is returning the values we expect.
     */
    public void testGetSurroundingItems() {
        
        final TimeSeries series = new TimeSeries("Series 1", Day.class);
        final TimeSeriesCollection collection = new TimeSeriesCollection(series);
        collection.setXPosition(TimePeriodAnchor.MIDDLE);
        
        // for a series with no data, we expect {-1, -1}...
        int[] result = collection.getSurroundingItems(0, 1000L);
        assertTrue(result[0] == -1);
        assertTrue(result[1] == -1);
        
        // now test with a single value in the series...
        final Day today = new Day();
        final long start1 = today.getFirstMillisecond();
        final long middle1 = today.getMiddleMillisecond();
        final long end1 = today.getLastMillisecond();
        
        series.add(today, 99.9);
        result = collection.getSurroundingItems(0, start1);
        assertTrue(result[0] == -1);
        assertTrue(result[1] == 0);
        
        result = collection.getSurroundingItems(0, middle1);
        assertTrue(result[0] == 0);
        assertTrue(result[1] == 0);
        
        result = collection.getSurroundingItems(0, end1);
        assertTrue(result[0] == 0);
        assertTrue(result[1] == -1);
        
        // now add a second value to the series...
        final Day tomorrow = (Day) today.next();
        final long start2 = tomorrow.getFirstMillisecond();
        final long middle2 = tomorrow.getMiddleMillisecond();
        final long end2 = tomorrow.getLastMillisecond();
        
        series.add(tomorrow, 199.9);
        result = collection.getSurroundingItems(0, start2);
        assertTrue(result[0] == 0);
        assertTrue(result[1] == 1);
        
        result = collection.getSurroundingItems(0, middle2);
        assertTrue(result[0] == 1);
        assertTrue(result[1] == 1);
        
        result = collection.getSurroundingItems(0, end2);
        assertTrue(result[0] == 1);
        assertTrue(result[1] == -1);
        
        // now add a third value to the series...
        final Day yesterday = (Day) today.previous();
        final long start3 = yesterday.getFirstMillisecond();
        final long middle3 = yesterday.getMiddleMillisecond();
        final long end3 = yesterday.getLastMillisecond();
        
        series.add(yesterday, 1.23);
        result = collection.getSurroundingItems(0, start3);
        assertTrue(result[0] == -1);
        assertTrue(result[1] == 0);
        
        result = collection.getSurroundingItems(0, middle3);
        assertTrue(result[0] == 0);
        assertTrue(result[1] == 0);
        
        result = collection.getSurroundingItems(0, end3);
        assertTrue(result[0] == 0);
        assertTrue(result[1] == 1);
        
    }
    
    /**
     * Serialize an instance, restore it, and check for equality.
     */
    public void testSerialization() {

        final TimeSeriesCollection c1 = new TimeSeriesCollection(createSeries());
        TimeSeriesCollection c2 = null;

        try {
            final ByteArrayOutputStream buffer = new ByteArrayOutputStream();
            final ObjectOutput out = new ObjectOutputStream(buffer);
            out.writeObject(c1);
            out.close();

            final ObjectInput in = new ObjectInputStream(
                new ByteArrayInputStream(buffer.toByteArray())
            );
            c2 = (TimeSeriesCollection) in.readObject();
            in.close();
        }
        catch (Exception e) {
            System.out.println(e.toString());
        }
        assertEquals(c1, c2);

    }

    /**
     * Creates a time series for testing.
     * 
     * @return a time series.
     */
    private TimeSeries createSeries() {
        RegularTimePeriod t = new Day();
        final TimeSeries series = new TimeSeries("Test");
        series.add(t, 1.0);
        t = t.next();
        series.add(t, 2.0);
        t = t.next();
        series.add(t, null);
        t = t.next();
        series.add(t, 4.0);
        return series;
    }
    
}