jfreechart example source code file (MeterPlotTests.java)

This example jfreechart source code file (MeterPlotTests.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

awt, bytearrayoutputstream, bytearrayoutputstream, decimalformat, font, font, io, meterinterval, meterplot, meterplot, meterplottests, normal, objectinput, serif, serif, test, text

The jfreechart MeterPlotTests.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.]
 *
 * -------------------
 * MeterPlotTests.java
 * -------------------
 * (C) Copyright 2003-2008, by Object Refinery Limited and Contributors.
 *
 * Original Author:  David Gilbert (for Object Refinery Limited);
 * Contributor(s):   -;
 *
 * Changes
 * -------
 * 27-Mar-2003 : Version 1 (DG);
 * 12-May-2004 : Updated testEquals() (DG);
 * 29-Nov-2007 : Updated testEquals() and testSerialization1() for
 *               dialOutlinePaint (DG)
 *
 */

package org.jfree.chart.plot.junit;

import java.awt.Color;
import java.awt.Font;
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 java.text.DecimalFormat;

import junit.framework.Test;
import junit.framework.TestCase;
import junit.framework.TestSuite;

import org.jfree.chart.plot.DialShape;
import org.jfree.chart.plot.MeterInterval;
import org.jfree.chart.plot.MeterPlot;
import org.jfree.data.Range;
import org.jfree.data.general.DefaultValueDataset;

/**
 * Tests for the {@link MeterPlot} class.
 */
public class MeterPlotTests extends TestCase {

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

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

    /**
     * Test the equals method to ensure that it can distinguish the required
     * fields.  Note that the dataset is NOT considered in the equals test.
     */
    public void testEquals() {
        MeterPlot plot1 = new MeterPlot();
        MeterPlot plot2 = new MeterPlot();
        assertTrue(plot1.equals(plot2));

        // units
        plot1.setUnits("mph");
        assertFalse(plot1.equals(plot2));
        plot2.setUnits("mph");
        assertTrue(plot1.equals(plot2));

        // range
        plot1.setRange(new Range(50.0, 70.0));
        assertFalse(plot1.equals(plot2));
        plot2.setRange(new Range(50.0, 70.0));
        assertTrue(plot1.equals(plot2));

        // interval
        plot1.addInterval(new MeterInterval("Normal", new Range(55.0, 60.0)));
        assertFalse(plot1.equals(plot2));
        plot2.addInterval(new MeterInterval("Normal", new Range(55.0, 60.0)));
        assertTrue(plot1.equals(plot2));

        // dial outline paint
        plot1.setDialOutlinePaint(new GradientPaint(1.0f, 2.0f, Color.red,
                3.0f, 4.0f, Color.blue));
        assertFalse(plot1.equals(plot2));
        plot2.setDialOutlinePaint(new GradientPaint(1.0f, 2.0f, Color.red,
                3.0f, 4.0f, Color.blue));
        assertTrue(plot1.equals(plot2));

        // dial shape
        plot1.setDialShape(DialShape.CHORD);
        assertFalse(plot1.equals(plot2));
        plot2.setDialShape(DialShape.CHORD);
        assertTrue(plot1.equals(plot2));

        // dial background paint
        plot1.setDialBackgroundPaint(new GradientPaint(9.0f, 8.0f, Color.red,
                7.0f, 6.0f, Color.blue));
        assertFalse(plot1.equals(plot2));
        plot2.setDialBackgroundPaint(new GradientPaint(9.0f, 8.0f, Color.red,
                7.0f, 6.0f, Color.blue));
        assertTrue(plot1.equals(plot2));

        // dial outline paint
        plot1.setDialOutlinePaint(new GradientPaint(1.0f, 2.0f, Color.green,
                3.0f, 4.0f, Color.red));
        assertFalse(plot1.equals(plot2));
        plot2.setDialOutlinePaint(new GradientPaint(1.0f, 2.0f, Color.green,
                3.0f, 4.0f, Color.red));
        assertTrue(plot1.equals(plot2));

        // needle paint
        plot1.setNeedlePaint(new GradientPaint(9.0f, 8.0f, Color.red,
                7.0f, 6.0f, Color.blue));
        assertFalse(plot1.equals(plot2));
        plot2.setNeedlePaint(new GradientPaint(9.0f, 8.0f, Color.red,
                7.0f, 6.0f, Color.blue));
        assertTrue(plot1.equals(plot2));

        // value font
        plot1.setValueFont(new Font("Serif", Font.PLAIN, 6));
        assertFalse(plot1.equals(plot2));
        plot2.setValueFont(new Font("Serif", Font.PLAIN, 6));
        assertTrue(plot1.equals(plot2));

        // value paint
        plot1.setValuePaint(new GradientPaint(1.0f, 2.0f, Color.black,
                3.0f, 4.0f, Color.white));
        assertFalse(plot1.equals(plot2));
        plot2.setValuePaint(new GradientPaint(1.0f, 2.0f, Color.black,
                3.0f, 4.0f, Color.white));
        assertTrue(plot1.equals(plot2));

        // tick labels visible
        plot1.setTickLabelsVisible(false);
        assertFalse(plot1.equals(plot2));
        plot2.setTickLabelsVisible(false);
        assertTrue(plot1.equals(plot2));

        // tick label font
        plot1.setTickLabelFont(new Font("Serif", Font.PLAIN, 6));
        assertFalse(plot1.equals(plot2));
        plot2.setTickLabelFont(new Font("Serif", Font.PLAIN, 6));
        assertTrue(plot1.equals(plot2));

        // tick label paint
        plot1.setTickLabelPaint(Color.red);
        assertFalse(plot1.equals(plot2));
        plot2.setTickLabelPaint(Color.red);
        assertTrue(plot1.equals(plot2));

        // tick label format
        plot1.setTickLabelFormat(new DecimalFormat("0"));
        assertFalse(plot1.equals(plot2));
        plot2.setTickLabelFormat(new DecimalFormat("0"));
        assertTrue(plot1.equals(plot2));

        // tick paint
        plot1.setTickPaint(Color.green);
        assertFalse(plot1.equals(plot2));
        plot2.setTickPaint(Color.green);
        assertTrue(plot1.equals(plot2));

        // tick size
        plot1.setTickSize(1.23);
        assertFalse(plot1.equals(plot2));
        plot2.setTickSize(1.23);
        assertTrue(plot1.equals(plot2));

        // draw border
        plot1.setDrawBorder(!plot1.getDrawBorder());
        assertFalse(plot1.equals(plot2));
        plot2.setDrawBorder(plot1.getDrawBorder());
        assertTrue(plot1.equals(plot2));

        // meter angle
        plot1.setMeterAngle(22);
        assertFalse(plot1.equals(plot2));
        plot2.setMeterAngle(22);
        assertTrue(plot1.equals(plot2));

    }

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

        // the clone and the original share a reference to the SAME dataset
        assertTrue(p1.getDataset() == p2.getDataset());

        // try a few checks to ensure that the clone is independent of the
        // original
        p1.getTickLabelFormat().setMinimumIntegerDigits(99);
        assertFalse(p1.equals(p2));
        p2.getTickLabelFormat().setMinimumIntegerDigits(99);
        assertTrue(p1.equals(p2));

        p1.addInterval(new MeterInterval("Test", new Range(1.234, 5.678)));
        assertFalse(p1.equals(p2));
        p2.addInterval(new MeterInterval("Test", new Range(1.234, 5.678)));
        assertTrue(p1.equals(p2));

    }

    /**
     * Serialize an instance, restore it, and check for equality.
     */
    public void testSerialization1() {
        MeterPlot p1 = new MeterPlot(null);
        p1.setDialBackgroundPaint(new GradientPaint(1.0f, 2.0f, Color.red,
                3.0f, 4.0f, Color.blue));
        p1.setDialOutlinePaint(new GradientPaint(4.0f, 3.0f, Color.red,
                2.0f, 1.0f, Color.blue));
        p1.setNeedlePaint(new GradientPaint(1.0f, 2.0f, Color.red,
                3.0f, 4.0f, Color.blue));
        p1.setTickLabelPaint(new GradientPaint(1.0f, 2.0f, Color.red,
                3.0f, 4.0f, Color.blue));
        p1.setTickPaint(new GradientPaint(1.0f, 2.0f, Color.red,
                3.0f, 4.0f, Color.blue));
        MeterPlot 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 = (MeterPlot) in.readObject();
            in.close();
        }
        catch (Exception e) {
            e.printStackTrace();
        }
        assertEquals(p1, p2);
    }

    /**
     * Serialize an instance, restore it, and check for equality.
     */
    public void testSerialization2() {
        MeterPlot p1 = new MeterPlot(new DefaultValueDataset(1.23));
        MeterPlot 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 = (MeterPlot) in.readObject();
            in.close();
        }
        catch (Exception e) {
            e.printStackTrace();
        }
        assertEquals(p1, p2);

    }

}