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jfreechart example source code file (TimeSeriesCollectionTests.java)

This example jfreechart source code file (TimeSeriesCollectionTests.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

bytearrayoutputstream, day, day, io, objectinput, s2, series, series, test, testcase, timeseries, timeseries, timeseriescollection, timeseriescollection, timeseriescollectiontests

The jfreechart TimeSeriesCollectionTests.java source code

/* ===========================================================
 * JFreeChart : a free chart library for the Java(tm) platform
 * ===========================================================
 *
 * (C) Copyright 2000-2008, 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.]
 *
 * ------------------------------
 * TimeSeriesCollectionTests.java
 * ------------------------------
 * (C) Copyright 2003-2008, by Object Refinery Limited.
 *
 * Original Author:  David Gilbert (for Object Refinery Limited);
 * Contributor(s):   -;
 *
 * Changes
 * -------
 * 01-May-2003 : Version 1 (DG);
 * 04-Dec-2003 : Added a test for the getSurroundingItems() method (DG);
 * 08-May-2007 : Added testIndexOf() 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(String name) {
        super(name);
    }

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

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

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

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

        // add series to collection 1, should be not equal
        c1.addSeries(s1);
        c1.addSeries(s2);
        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);
        boolean b3 = c1.equals(c2);
        assertTrue("b3", b3);

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

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

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

        TimeSeriesCollection c1 = new TimeSeriesCollection();

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

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

        c1.removeSeries(s3);

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

    }

    /**
     * Test the getSurroundingItems() method to ensure it is returning the
     * values we expect.
     */
    public void testGetSurroundingItems() {

        TimeSeries series = new TimeSeries("Series 1", Day.class);
        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...
        Day today = new Day();
        long start1 = today.getFirstMillisecond();
        long middle1 = today.getMiddleMillisecond();
        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...
        Day tomorrow = (Day) today.next();
        long start2 = tomorrow.getFirstMillisecond();
        long middle2 = tomorrow.getMiddleMillisecond();
        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...
        Day yesterday = (Day) today.previous();
        long start3 = yesterday.getFirstMillisecond();
        long middle3 = yesterday.getMiddleMillisecond();
        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() {

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

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

            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();
        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;
    }

    /**
     * A test for bug report 1170825.
     */
    public void test1170825() {
        TimeSeries s1 = new TimeSeries("Series1");
        TimeSeriesCollection dataset = new TimeSeriesCollection();
        dataset.addSeries(s1);
        try {
            /* TimeSeries s = */ dataset.getSeries(1);
        }
        catch (IllegalArgumentException e) {
            // correct outcome
        }
        catch (IndexOutOfBoundsException e) {
            assertTrue(false);  // wrong outcome
        }
    }

    /**
     * Some tests for the indexOf() method.
     */
    public void testIndexOf() {
        TimeSeries s1 = new TimeSeries("S1");
        TimeSeries s2 = new TimeSeries("S2");
        TimeSeriesCollection dataset = new TimeSeriesCollection();
        assertEquals(-1, dataset.indexOf(s1));
        assertEquals(-1, dataset.indexOf(s2));

        dataset.addSeries(s1);
        assertEquals(0, dataset.indexOf(s1));
        assertEquals(-1, dataset.indexOf(s2));

        dataset.addSeries(s2);
        assertEquals(0, dataset.indexOf(s1));
        assertEquals(1, dataset.indexOf(s2));

        dataset.removeSeries(s1);
        assertEquals(-1, dataset.indexOf(s1));
        assertEquals(0, dataset.indexOf(s2));

        TimeSeries s2b = new TimeSeries("S2");
        assertEquals(0, dataset.indexOf(s2b));
    }

}

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