TimeSeriesDataItemTests.java

/* ===========================================================
 * JFreeChart : a free chart library for the Java(tm) platform
 * ===========================================================
 *
 * (C) Copyright 2000-2011, 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.
 *
 * [Oracle and Java are registered trademarks of Oracle and/or its affiliates. 
 * Other names may be trademarks of their respective owners.]
 *
 * ----------------------------
 * TimeSeriesDataItemTests.java
 * ----------------------------
 * (C) Copyright 2003-2008, by Object Refinery Limited.
 *
 * Original Author:  David Gilbert (for Object Refinery Limited);
 * Contributor(s):   -;
 *
 * Changes
 * -------
 * 13-Mar-2003 : Version 1 (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.TimeSeriesDataItem;

/**
 * Tests for the {@link TimeSeriesDataItem} class.
 */
public class TimeSeriesDataItemTests extends TestCase {

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

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

    /**
     * Common test setup.
     */
    protected void setUp() {
        // no setup
    }

    /**
     * Test that an instance is equal to itself.
     *
     * SourceForge Bug ID: 558850.
     */
    public void testEqualsSelf() {
        TimeSeriesDataItem item = new TimeSeriesDataItem(
            new Day(23, 9, 2001), 99.7
        );
        assertTrue(item.equals(item));
    }

    /**
     * Test the equals() method.
     */
    public void testEquals() {
        TimeSeriesDataItem item1 = new TimeSeriesDataItem(
            new Day(23, 9, 2001), 99.7
        );
        TimeSeriesDataItem item2 = new TimeSeriesDataItem(
            new Day(23, 9, 2001), 99.7
        );
        assertTrue(item1.equals(item2));
        assertTrue(item2.equals(item1));

        item1.setValue(new Integer(5));
        assertFalse(item1.equals(item2));
        item2.setValue(new Integer(5));
        assertTrue(item1.equals(item2));
    }

    /**
     * Serialize an instance, restore it, and check for equality.
     */
    public void testSerialization() {

        TimeSeriesDataItem item1 = new TimeSeriesDataItem(
            new Day(23, 9, 2001), 99.7
        );
        TimeSeriesDataItem item2 = null;

        try {
            ByteArrayOutputStream buffer = new ByteArrayOutputStream();
            ObjectOutput out = new ObjectOutputStream(buffer);
            out.writeObject(item1);
            out.close();

            ObjectInput in = new ObjectInputStream(
                new ByteArrayInputStream(buffer.toByteArray())
            );
            item2 = (TimeSeriesDataItem) in.readObject();
            in.close();
        }
        catch (Exception e) {
            System.out.println(e.toString());
        }
        assertEquals(item1, item2);

    }

}