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jfreechart example source code file (IntervalMarkerTests.java)

This example jfreechart source code file (IntervalMarkerTests.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, bytearrayoutputstream, clonenotsupportedexception, epsilon, epsilon, intervalmarker, intervalmarker, intervalmarkertests, intervalmarkertests, io, markerchangelistener, objectinput, standardgradientpainttransformer, test, testcase

The jfreechart IntervalMarkerTests.java source code

/* ===========================================================
 * 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.]
 *
 * ------------------------
 * IntervalMarkerTests.java
 * ------------------------
 * (C) Copyright 2004-2007, by Object Refinery Limited and Contributors.
 *
 * Original Author:  David Gilbert (for Object Refinery Limited);
 * Contributor(s):   -;
 *
 * Changes
 * -------
 * 14-Jun-2004 : Version 1 (DG);
 * 05-Sep-2006 : Added checks for MarkerChangeEvents (DG);
 *
 */

package org.jfree.chart.plot.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.chart.event.MarkerChangeEvent;
import org.jfree.chart.event.MarkerChangeListener;
import org.jfree.chart.plot.IntervalMarker;
import org.jfree.ui.GradientPaintTransformType;
import org.jfree.ui.GradientPaintTransformer;
import org.jfree.ui.StandardGradientPaintTransformer;

/**
 * Tests for the {@link IntervalMarker} class.
 */
public class IntervalMarkerTests
    extends TestCase
    implements MarkerChangeListener {

    MarkerChangeEvent lastEvent;

    /**
     * Records the last event.
     *
     * @param event  the last event.
     */
    public void markerChanged(MarkerChangeEvent event) {
        this.lastEvent = event;
    }

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

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

    /**
     * Confirm that the equals method can distinguish all the required fields.
     */
    public void testEquals() {

        IntervalMarker m1 = new IntervalMarker(45.0, 50.0);
        IntervalMarker m2 = new IntervalMarker(45.0, 50.0);
        assertTrue(m1.equals(m2));
        assertTrue(m2.equals(m1));

        m1 = new IntervalMarker(44.0, 50.0);
        assertFalse(m1.equals(m2));
        m2 = new IntervalMarker(44.0, 50.0);
        assertTrue(m1.equals(m2));

        m1 = new IntervalMarker(44.0, 55.0);
        assertFalse(m1.equals(m2));
        m2 = new IntervalMarker(44.0, 55.0);
        assertTrue(m1.equals(m2));

        GradientPaintTransformer t = new StandardGradientPaintTransformer(
                GradientPaintTransformType.HORIZONTAL);
        m1.setGradientPaintTransformer(t);
        assertFalse(m1.equals(m2));
        m2.setGradientPaintTransformer(t);
        assertTrue(m1.equals(m2));

    }

    /**
     * Confirm that cloning works.
     */
    public void testCloning() {
        IntervalMarker m1 = new IntervalMarker(45.0, 50.0);
        IntervalMarker m2 = null;
        try {
            m2 = (IntervalMarker) m1.clone();
        }
        catch (CloneNotSupportedException e) {
            e.printStackTrace();
        }
        assertTrue(m1 != m2);
        assertTrue(m1.getClass() == m2.getClass());
        assertTrue(m1.equals(m2));
    }

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

        IntervalMarker m1 = new IntervalMarker(45.0, 50.0);
        IntervalMarker m2 = null;
        try {
            ByteArrayOutputStream buffer = new ByteArrayOutputStream();
            ObjectOutput out = new ObjectOutputStream(buffer);
            out.writeObject(m1);
            out.close();

            ObjectInput in = new ObjectInputStream(
                    new ByteArrayInputStream(buffer.toByteArray()));
            m2 = (IntervalMarker) in.readObject();
            in.close();
        }
        catch (Exception e) {
            e.printStackTrace();
        }
        boolean b = m1.equals(m2);
        assertTrue(b);

    }

    private static final double EPSILON = 0.0000000001;

    /**
     * Some checks for the getStartValue() and setStartValue() methods.
     */
    public void testGetSetStartValue() {
        IntervalMarker m = new IntervalMarker(1.0, 2.0);
        m.addChangeListener(this);
        this.lastEvent = null;
        assertEquals(1.0, m.getStartValue(), EPSILON);
        m.setStartValue(0.5);
        assertEquals(0.5, m.getStartValue(), EPSILON);
        assertEquals(m, this.lastEvent.getMarker());
    }

    /**
     * Some checks for the getEndValue() and setEndValue() methods.
     */
    public void testGetSetEndValue() {
        IntervalMarker m = new IntervalMarker(1.0, 2.0);
        m.addChangeListener(this);
        this.lastEvent = null;
        assertEquals(2.0, m.getEndValue(), EPSILON);
        m.setEndValue(0.5);
        assertEquals(0.5, m.getEndValue(), EPSILON);
        assertEquals(m, this.lastEvent.getMarker());
    }
}

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