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jfreechart example source code file (DialPlotTests.java)

This example jfreechart source code file (DialPlotTests.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

arcdialframe, awt, bytearrayoutputstream, clonenotsupportedexception, dialbackground, dialbackground, dialcap, dialcap, dialplot, dialplot, dialplottests, io, objectinput, standarddialframe, standarddialscale, standarddialscale

The jfreechart DialPlotTests.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.]
 *
 * ------------------
 * DialPlotTests.java
 * ------------------
 * (C) Copyright 2006-2008, by Object Refinery Limited and Contributors.
 *
 * Original Author:  David Gilbert (for Object Refinery Limited);
 * Contributor(s):   -;
 *
 * Changes
 * -------
 * 03-Nov-2006 : Version 1 (DG);
 *
 */

package org.jfree.chart.plot.dial.junit;

import java.awt.Color;
import java.awt.GradientPaint;
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.PlotChangeEvent;
import org.jfree.chart.event.PlotChangeListener;
import org.jfree.chart.plot.dial.ArcDialFrame;
import org.jfree.chart.plot.dial.DialBackground;
import org.jfree.chart.plot.dial.DialCap;
import org.jfree.chart.plot.dial.DialPlot;
import org.jfree.chart.plot.dial.StandardDialFrame;
import org.jfree.chart.plot.dial.StandardDialScale;

/**
 * Tests for the {@link DialPlot} class.
 */
public class DialPlotTests extends TestCase implements PlotChangeListener {

    /** The last plot change event received. */
    private PlotChangeEvent lastEvent;

    /**
     * Records the last plot change event received.
     *
     * @param event  the event.
     */
    public void plotChanged(PlotChangeEvent event) {
        this.lastEvent = event;
    }


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

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

    /**
     * Confirm that the equals method can distinguish all the required fields.
     */
    public void testEquals() {
        DialPlot p1 = new DialPlot();
        DialPlot p2 = new DialPlot();
        assertTrue(p1.equals(p2));

        // background
        p1.setBackground(new DialBackground(Color.green));
        assertFalse(p1.equals(p2));
        p2.setBackground(new DialBackground(Color.green));
        assertTrue(p1.equals(p2));

        p1.setBackground(null);
        assertFalse(p1.equals(p2));
        p2.setBackground(null);
        assertTrue(p1.equals(p2));

        // dial cap
        DialCap cap1 = new DialCap();
        cap1.setFillPaint(Color.red);
        p1.setCap(cap1);
        assertFalse(p1.equals(p2));
        DialCap cap2 = new DialCap();
        cap2.setFillPaint(Color.red);
        p2.setCap(cap2);
        assertTrue(p1.equals(p2));

        p1.setCap(null);
        assertFalse(p1.equals(p2));
        p2.setCap(null);
        assertTrue(p1.equals(p2));

        // frame
        StandardDialFrame f1 = new StandardDialFrame();
        f1.setBackgroundPaint(new GradientPaint(1.0f, 2.0f, Color.red, 3.0f,
                4.0f, Color.white));
        p1.setDialFrame(f1);
        assertFalse(p1.equals(p2));
        StandardDialFrame f2 = new StandardDialFrame();
        f2.setBackgroundPaint(new GradientPaint(1.0f, 2.0f, Color.red, 3.0f,
                4.0f, Color.white));
        p2.setDialFrame(f2);
        assertTrue(p1.equals(p2));

        // view
        p1.setView(0.2, 0.0, 0.8, 1.0);
        assertFalse(p1.equals(p2));
        p2.setView(0.2, 0.0, 0.8, 1.0);
        assertTrue(p1.equals(p2));

        // layer
        p1.addLayer(new StandardDialScale());
        assertFalse(p1.equals(p2));
        p2.addLayer(new StandardDialScale());
        assertTrue(p1.equals(p2));
    }

    /**
     * Two objects that are equal are required to return the same hashCode.
     */
    public void testHashCode() {
        DialPlot p1 = new DialPlot();
        DialPlot p2 = new DialPlot();
        assertTrue(p1.equals(p2));
        int h1 = p1.hashCode();
        int h2 = p2.hashCode();
        assertEquals(h1, h2);
    }

    /**
     * Confirm that cloning works.
     */
    public void testCloning() {
        DialPlot p1 = new DialPlot();
        DialPlot p2 = null;
        try {
            p2 = (DialPlot) p1.clone();
        }
        catch (CloneNotSupportedException e) {
            e.printStackTrace();
        }
        assertTrue(p1 != p2);
        assertTrue(p1.getClass() == p2.getClass());
        assertTrue(p1.equals(p2));
    }


    /**
     * Serialize an instance, restore it, and check for equality.
     */
    public void testSerialization() {
        DialPlot p1 = new DialPlot();
        DialPlot p2 = null;

        try {
            ByteArrayOutputStream buffer = new ByteArrayOutputStream();
            ObjectOutput out = new ObjectOutputStream(buffer);
            out.writeObject(p1);
            out.close();

            ObjectInput in = new ObjectInputStream(
                    new ByteArrayInputStream(buffer.toByteArray()));
            p2 = (DialPlot) in.readObject();
            in.close();
        }
        catch (Exception e) {
            e.printStackTrace();
        }
        assertEquals(p1, p2);
    }

    /**
     * Check the notification event mechanism for the dial background.
     */
    public void testBackgroundListener() {
        DialPlot p = new DialPlot();
        DialBackground b1 = new DialBackground(Color.red);
        p.setBackground(b1);
        p.addChangeListener(this);
        this.lastEvent = null;
        b1.setPaint(Color.blue);
        assertNotNull(this.lastEvent);

        DialBackground b2 = new DialBackground(Color.green);
        p.setBackground(b2);
        this.lastEvent = null;
        b1.setPaint(Color.red);
        assertNull(this.lastEvent);
        b2.setPaint(Color.red);
        assertNotNull(this.lastEvent);
    }

    /**
     * Check the notification event mechanism for the dial cap.
     */
    public void testCapListener() {
        DialPlot p = new DialPlot();
        DialCap c1 = new DialCap();
        p.setCap(c1);
        p.addChangeListener(this);
        this.lastEvent = null;
        c1.setFillPaint(Color.red);
        assertNotNull(this.lastEvent);

        DialCap c2 = new DialCap();
        p.setCap(c2);
        this.lastEvent = null;
        c1.setFillPaint(Color.blue);
        assertNull(this.lastEvent);
        c2.setFillPaint(Color.green);
        assertNotNull(this.lastEvent);
    }

    /**
     * Check the notification event mechanism for the dial frame.
     */
    public void testFrameListener() {
        DialPlot p = new DialPlot();
        ArcDialFrame f1 = new ArcDialFrame();
        p.setDialFrame(f1);
        p.addChangeListener(this);
        this.lastEvent = null;
        f1.setBackgroundPaint(Color.gray);
        assertNotNull(this.lastEvent);

        ArcDialFrame f2 = new ArcDialFrame();
        p.setDialFrame(f2);
        this.lastEvent = null;
        f1.setBackgroundPaint(Color.blue);
        assertNull(this.lastEvent);
        f2.setBackgroundPaint(Color.green);
        assertNotNull(this.lastEvent);
    }

    /**
     * Check the notification event mechanism for the dial scales.
     */
    public void testScaleListener() {
        DialPlot p = new DialPlot();
        StandardDialScale s1 = new StandardDialScale();
        p.addScale(0, s1);
        p.addChangeListener(this);
        this.lastEvent = null;
        s1.setStartAngle(22.0);
        assertNotNull(this.lastEvent);

        StandardDialScale s2 = new StandardDialScale();
        p.addScale(0, s2);
        this.lastEvent = null;
        s1.setStartAngle(33.0);
        assertNull(this.lastEvent);
        s2.setStartAngle(33.0);
        assertNotNull(this.lastEvent);
    }

    /**
     * Check the notification event mechanism for a layer.
     */
    public void testLayerListener() {
        DialPlot p = new DialPlot();
        DialBackground b1 = new DialBackground(Color.red);
        p.addLayer(b1);
        p.addChangeListener(this);
        this.lastEvent = null;
        b1.setPaint(Color.blue);
        assertNotNull(this.lastEvent);

        DialBackground b2 = new DialBackground(Color.green);
        p.addLayer(b2);
        this.lastEvent = null;
        b1.setPaint(Color.red);
        assertNotNull(this.lastEvent);
        b2.setPaint(Color.green);
        assertNotNull(this.lastEvent);

        p.removeLayer(b2);
        this.lastEvent = null;
        b2.setPaint(Color.red);
        assertNull(this.lastEvent);
    }

}

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