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jfreechart example source code file (PiePlotTests.java)

This example jfreechart source code file (PiePlotTests.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

a, a, awt, clonenotsupportedexception, clonenotsupportedexception, custompieurlgenerator, defaultpiedataset, font, geometry, image, io, item, pieplot, pieplot, rectangle, standardpiesectionlabelgenerator, standardpiesectionlabelgenerator, standardpieurlgenerator, text

The jfreechart PiePlotTests.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.]
 *
 * -----------------
 * PiePlotTests.java
 * -----------------
 * (C) Copyright 2003-2008, by Object Refinery Limited and Contributors.
 *
 * Original Author:  David Gilbert (for Object Refinery Limited);
 * Contributor(s):   -;
 *
 * Changes
 * -------
 * 18-Mar-2003 : Version 1 (DG);
 * 10-May-2005 : Strengthened equals() test (DG);
 * 27-Sep-2006 : Added tests for the getBaseSectionPaint() method (DG);
 * 23-Nov-2006 : Additional equals() and clone() tests (DG);
 * 17-Apr-2007 : Added check for label generator that returns a null label (DG);
 * 31-Mar-2008 : Updated testEquals();
 *
 */

package org.jfree.chart.plot.junit;

import java.awt.BasicStroke;
import java.awt.Color;
import java.awt.Font;
import java.awt.GradientPaint;
import java.awt.Graphics2D;
import java.awt.Rectangle;
import java.awt.Stroke;
import java.awt.geom.Rectangle2D;
import java.awt.image.BufferedImage;
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.AttributedString;

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

import org.jfree.chart.ChartFactory;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.LegendItemCollection;
import org.jfree.chart.labels.PieSectionLabelGenerator;
import org.jfree.chart.labels.StandardPieSectionLabelGenerator;
import org.jfree.chart.labels.StandardPieToolTipGenerator;
import org.jfree.chart.plot.PieLabelLinkStyle;
import org.jfree.chart.plot.PiePlot;
import org.jfree.chart.urls.CustomPieURLGenerator;
import org.jfree.chart.urls.StandardPieURLGenerator;
import org.jfree.data.general.DefaultPieDataset;
import org.jfree.data.general.PieDataset;
import org.jfree.util.Rotation;

/**
 * Some tests for the {@link PiePlot} class.
 */
public class PiePlotTests extends TestCase {

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

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

    /**
     * Test the equals() method.
     */
    public void testEquals() {

        PiePlot plot1 = new PiePlot();
        PiePlot plot2 = new PiePlot();
        assertTrue(plot1.equals(plot2));
        assertTrue(plot2.equals(plot1));

        // pieIndex...
        plot1.setPieIndex(99);
        assertFalse(plot1.equals(plot2));
        plot2.setPieIndex(99);
        assertTrue(plot1.equals(plot2));

        // interiorGap...
        plot1.setInteriorGap(0.15);
        assertFalse(plot1.equals(plot2));
        plot2.setInteriorGap(0.15);
        assertTrue(plot1.equals(plot2));

        // circular
        plot1.setCircular(!plot1.isCircular());
        assertFalse(plot1.equals(plot2));
        plot2.setCircular(false);
        assertTrue(plot1.equals(plot2));

        // startAngle
        plot1.setStartAngle(Math.PI);
        assertFalse(plot1.equals(plot2));
        plot2.setStartAngle(Math.PI);
        assertTrue(plot1.equals(plot2));

        // direction
        plot1.setDirection(Rotation.ANTICLOCKWISE);
        assertFalse(plot1.equals(plot2));
        plot2.setDirection(Rotation.ANTICLOCKWISE);
        assertTrue(plot1.equals(plot2));

        // ignoreZeroValues
        plot1.setIgnoreZeroValues(true);
        plot2.setIgnoreZeroValues(false);
        assertFalse(plot1.equals(plot2));
        plot2.setIgnoreZeroValues(true);
        assertTrue(plot1.equals(plot2));

        // ignoreNullValues
        plot1.setIgnoreNullValues(true);
        plot2.setIgnoreNullValues(false);
        assertFalse(plot1.equals(plot2));
        plot2.setIgnoreNullValues(true);
        assertTrue(plot1.equals(plot2));

        // sectionPaint
        plot1.setSectionPaint(new GradientPaint(1.0f, 2.0f, Color.red,
                3.0f, 4.0f, Color.white));
        assertFalse(plot1.equals(plot2));
        plot2.setSectionPaint(new GradientPaint(1.0f, 2.0f, Color.red,
                3.0f, 4.0f, Color.white));
        assertTrue(plot1.equals(plot2));

        // sectionPaintMap
        plot1.setSectionPaint("A", new GradientPaint(1.0f, 2.0f, Color.blue,
                3.0f, 4.0f, Color.white));
        assertFalse(plot1.equals(plot2));
        plot2.setSectionPaint("A", new GradientPaint(1.0f, 2.0f, Color.blue,
                3.0f, 4.0f, Color.white));
        assertTrue(plot1.equals(plot2));

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

        // sectionOutlinesVisible
        plot1.setSectionOutlinesVisible(false);
        assertFalse(plot1.equals(plot2));
        plot2.setSectionOutlinesVisible(false);
        assertTrue(plot1.equals(plot2));

        // sectionOutlinePaint
        plot1.setSectionOutlinePaint(new GradientPaint(1.0f, 2.0f, Color.cyan,
                3.0f, 4.0f, Color.white));
        assertFalse(plot1.equals(plot2));
        plot2.setSectionOutlinePaint(new GradientPaint(1.0f, 2.0f, Color.cyan,
                3.0f, 4.0f, Color.white));
        assertTrue(plot1.equals(plot2));

        // sectionOutlinePaintList
        plot1.setSectionOutlinePaint("A", new GradientPaint(1.0f, 2.0f,
                Color.green, 3.0f, 4.0f, Color.white));
        assertFalse(plot1.equals(plot2));
        plot2.setSectionOutlinePaint("A", new GradientPaint(1.0f, 2.0f,
                Color.green, 3.0f, 4.0f, Color.white));
        assertTrue(plot1.equals(plot2));

        // baseSectionOutlinePaint
        plot1.setBaseSectionOutlinePaint(new GradientPaint(1.0f, 2.0f,
                Color.gray, 3.0f, 4.0f, Color.white));
        assertFalse(plot1.equals(plot2));
        plot2.setBaseSectionOutlinePaint(new GradientPaint(1.0f, 2.0f,
                Color.gray, 3.0f, 4.0f, Color.white));
        assertTrue(plot1.equals(plot2));

        // sectionOutlineStroke
        plot1.setSectionOutlineStroke(new BasicStroke(1.0f));
        assertFalse(plot1.equals(plot2));
        plot2.setSectionOutlineStroke(new BasicStroke(1.0f));
        assertTrue(plot1.equals(plot2));

        // sectionOutlineStrokeList
        plot1.setSectionOutlineStroke("A", new BasicStroke(1.0f));
        assertFalse(plot1.equals(plot2));
        plot2.setSectionOutlineStroke("A", new BasicStroke(1.0f));
        assertTrue(plot1.equals(plot2));

        // baseSectionOutlineStroke
        plot1.setBaseSectionOutlineStroke(new BasicStroke(1.0f));
        assertFalse(plot1.equals(plot2));
        plot2.setBaseSectionOutlineStroke(new BasicStroke(1.0f));
        assertTrue(plot1.equals(plot2));

        // shadowPaint
        plot1.setShadowPaint(new GradientPaint(1.0f, 2.0f, Color.orange,
                3.0f, 4.0f, Color.white));
        assertFalse(plot1.equals(plot2));
        plot2.setShadowPaint(new GradientPaint(1.0f, 2.0f, Color.orange,
                3.0f, 4.0f, Color.white));
        assertTrue(plot1.equals(plot2));

        // shadowXOffset
        plot1.setShadowXOffset(4.4);
        assertFalse(plot1.equals(plot2));
        plot2.setShadowXOffset(4.4);
        assertTrue(plot1.equals(plot2));

        // shadowYOffset
        plot1.setShadowYOffset(4.4);
        assertFalse(plot1.equals(plot2));
        plot2.setShadowYOffset(4.4);
        assertTrue(plot1.equals(plot2));

        // labelFont
        plot1.setLabelFont(new Font("Serif", Font.PLAIN, 18));
        assertFalse(plot1.equals(plot2));
        plot2.setLabelFont(new Font("Serif", Font.PLAIN, 18));
        assertTrue(plot1.equals(plot2));

        // labelPaint
        plot1.setLabelPaint(new GradientPaint(1.0f, 2.0f, Color.darkGray,
                3.0f, 4.0f, Color.white));
        assertFalse(plot1.equals(plot2));
        plot2.setLabelPaint(new GradientPaint(1.0f, 2.0f, Color.darkGray,
                3.0f, 4.0f, Color.white));
        assertTrue(plot1.equals(plot2));

        // labelBackgroundPaint
        plot1.setLabelBackgroundPaint(new GradientPaint(1.0f, 2.0f, Color.red,
                3.0f, 4.0f, Color.white));
        assertFalse(plot1.equals(plot2));
        plot2.setLabelBackgroundPaint(new GradientPaint(1.0f, 2.0f, Color.red,
                3.0f, 4.0f, Color.white));
        assertTrue(plot1.equals(plot2));

        // labelOutlinePaint
        plot1.setLabelOutlinePaint(new GradientPaint(1.0f, 2.0f, Color.blue,
                3.0f, 4.0f, Color.white));
        assertFalse(plot1.equals(plot2));
        plot2.setLabelOutlinePaint(new GradientPaint(1.0f, 2.0f, Color.blue,
                3.0f, 4.0f, Color.white));
        assertTrue(plot1.equals(plot2));

        // labelOutlineStroke
        Stroke s = new BasicStroke(1.1f);
        plot1.setLabelOutlineStroke(s);
        assertFalse(plot1.equals(plot2));
        plot2.setLabelOutlineStroke(s);
        assertTrue(plot1.equals(plot2));

        // labelShadowPaint
        plot1.setLabelShadowPaint(new GradientPaint(1.0f, 2.0f, Color.yellow,
                3.0f, 4.0f, Color.white));
        assertFalse(plot1.equals(plot2));
        plot2.setLabelShadowPaint(new GradientPaint(1.0f, 2.0f, Color.yellow,
                3.0f, 4.0f, Color.white));
        assertTrue(plot1.equals(plot2));

        // explodePercentages
        plot1.setExplodePercent("A", 0.33);
        assertFalse(plot1.equals(plot2));
        plot2.setExplodePercent("A", 0.33);
        assertTrue(plot1.equals(plot2));

        // labelGenerator
        plot1.setLabelGenerator(new StandardPieSectionLabelGenerator(
                "{2}{1}{0}"));
        assertFalse(plot1.equals(plot2));
        plot2.setLabelGenerator(new StandardPieSectionLabelGenerator(
                "{2}{1}{0}"));
        assertTrue(plot1.equals(plot2));

        // labelFont
        Font f = new Font("SansSerif", Font.PLAIN, 20);
        plot1.setLabelFont(f);
        assertFalse(plot1.equals(plot2));
        plot2.setLabelFont(f);
        assertTrue(plot1.equals(plot2));

        // labelPaint
        plot1.setLabelPaint(new GradientPaint(1.0f, 2.0f, Color.magenta,
                3.0f, 4.0f, Color.white));
        assertFalse(plot1.equals(plot2));
        plot2.setLabelPaint(new GradientPaint(1.0f, 2.0f, Color.magenta,
                3.0f, 4.0f, Color.white));
        assertTrue(plot1.equals(plot2));

        // maximumLabelWidth
        plot1.setMaximumLabelWidth(0.33);
        assertFalse(plot1.equals(plot2));
        plot2.setMaximumLabelWidth(0.33);
        assertTrue(plot1.equals(plot2));

        // labelGap
        plot1.setLabelGap(0.11);
        assertFalse(plot1.equals(plot2));
        plot2.setLabelGap(0.11);
        assertTrue(plot1.equals(plot2));

        // links visible
        plot1.setLabelLinksVisible(false);
        assertFalse(plot1.equals(plot2));
        plot2.setLabelLinksVisible(false);
        assertTrue(plot1.equals(plot2));

        plot1.setLabelLinkStyle(PieLabelLinkStyle.QUAD_CURVE);
        assertFalse(plot1.equals(plot2));
        plot2.setLabelLinkStyle(PieLabelLinkStyle.QUAD_CURVE);
        assertTrue(plot1.equals(plot2));

        // linkMargin
        plot1.setLabelLinkMargin(0.11);
        assertFalse(plot1.equals(plot2));
        plot2.setLabelLinkMargin(0.11);
        assertTrue(plot1.equals(plot2));

        // labelLinkPaint
        plot1.setLabelLinkPaint(new GradientPaint(1.0f, 2.0f, Color.magenta,
                3.0f, 4.0f, Color.white));
        assertFalse(plot1.equals(plot2));
        plot2.setLabelLinkPaint(new GradientPaint(1.0f, 2.0f, Color.magenta,
                3.0f, 4.0f, Color.white));
        assertTrue(plot1.equals(plot2));

        // labelLinkStroke
        plot1.setLabelLinkStroke(new BasicStroke(1.0f));
        assertFalse(plot1.equals(plot2));
        plot2.setLabelLinkStroke(new BasicStroke(1.0f));
        assertTrue(plot1.equals(plot2));

        // toolTipGenerator
        plot1.setToolTipGenerator(
            new StandardPieToolTipGenerator("{2}{1}{0}")
        );
        assertFalse(plot1.equals(plot2));
        plot2.setToolTipGenerator(
            new StandardPieToolTipGenerator("{2}{1}{0}")
        );
        assertTrue(plot1.equals(plot2));

        // urlGenerator
        plot1.setURLGenerator(new StandardPieURLGenerator("xx"));
        assertFalse(plot1.equals(plot2));
        plot2.setURLGenerator(new StandardPieURLGenerator("xx"));
        assertTrue(plot1.equals(plot2));

        // minimumArcAngleToDraw
        plot1.setMinimumArcAngleToDraw(1.0);
        assertFalse(plot1.equals(plot2));
        plot2.setMinimumArcAngleToDraw(1.0);
        assertTrue(plot1.equals(plot2));

        // legendItemShape
        plot1.setLegendItemShape(new Rectangle2D.Double(1.0, 2.0, 3.0, 4.0));
        assertFalse(plot1.equals(plot2));
        plot2.setLegendItemShape(new Rectangle2D.Double(1.0, 2.0, 3.0, 4.0));
        assertTrue(plot1.equals(plot2));

        // legendLabelGenerator
        plot1.setLegendLabelGenerator(new StandardPieSectionLabelGenerator(
                "{0} --> {1}"));
        assertFalse(plot1.equals(plot2));
        plot2.setLegendLabelGenerator(new StandardPieSectionLabelGenerator(
                "{0} --> {1}"));
        assertTrue(plot1.equals(plot2));

        // legendLabelToolTipGenerator
        plot1.setLegendLabelToolTipGenerator(
                new StandardPieSectionLabelGenerator("{0} is {1}"));
        assertFalse(plot1.equals(plot2));
        plot2.setLegendLabelToolTipGenerator(
                new StandardPieSectionLabelGenerator("{0} is {1}"));
        assertTrue(plot1.equals(plot2));

        // legendLabelURLGenerator
        plot1.setLegendLabelURLGenerator(new StandardPieURLGenerator(
                "index.html"));
        assertFalse(plot1.equals(plot2));
        plot2.setLegendLabelURLGenerator(new StandardPieURLGenerator(
                "index.html"));
        assertTrue(plot1.equals(plot2));

        // autoPopulateSectionPaint
        plot1.setAutoPopulateSectionPaint(false);
        assertFalse(plot1.equals(plot2));
        plot2.setAutoPopulateSectionPaint(false);
        assertTrue(plot1.equals(plot2));

        // autoPopulateSectionOutlinePaint
        plot1.setAutoPopulateSectionOutlinePaint(true);
        assertFalse(plot1.equals(plot2));
        plot2.setAutoPopulateSectionOutlinePaint(true);
        assertTrue(plot1.equals(plot2));

        // autoPopulateSectionOutlineStroke
        plot1.setAutoPopulateSectionOutlineStroke(true);
        assertFalse(plot1.equals(plot2));
        plot2.setAutoPopulateSectionOutlineStroke(true);
        assertTrue(plot1.equals(plot2));
    }

    /**
     * Some basic checks for the clone() method.
     */
    public void testCloning() {
        PiePlot p1 = new PiePlot();
        PiePlot p2 = null;
        try {
            p2 = (PiePlot) p1.clone();
        }
        catch (CloneNotSupportedException e) {
            e.printStackTrace();
        }
        assertTrue(p1 != p2);
        assertTrue(p1.getClass() == p2.getClass());
        assertTrue(p1.equals(p2));
    }

    /**
     * Check cloning of the urlGenerator field.
     */
    public void testCloning_URLGenerator() {
        CustomPieURLGenerator generator = new CustomPieURLGenerator();
        PiePlot p1 = new PiePlot();
        p1.setURLGenerator(generator);
        PiePlot p2 = null;
        try {
            p2 = (PiePlot) p1.clone();
        }
        catch (CloneNotSupportedException e) {
            e.printStackTrace();
        }
        assertTrue(p1 != p2);
        assertTrue(p1.getClass() == p2.getClass());
        assertTrue(p1.equals(p2));

        // check that the URL generator has been cloned
        assertTrue(p1.getURLGenerator() != p2.getURLGenerator());
    }

    /**
     * Check cloning of the legendItemShape field.
     */
    public void testCloning_LegendItemShape() {
        Rectangle shape = new Rectangle(-4, -4, 8, 8);
        PiePlot p1 = new PiePlot();
        p1.setLegendItemShape(shape);
        PiePlot p2 = null;
        try {
            p2 = (PiePlot) p1.clone();
        }
        catch (CloneNotSupportedException e) {
            e.printStackTrace();
        }
        assertTrue(p1 != p2);
        assertTrue(p1.getClass() == p2.getClass());
        assertTrue(p1.equals(p2));

        // change the shape and make sure it only affects p1
        shape.setRect(1.0, 2.0, 3.0, 4.0);
        assertFalse(p1.equals(p2));
    }

    /**
     * Check cloning of the legendLabelGenerator field.
     */
    public void testCloning_LegendLabelGenerator() {
        StandardPieSectionLabelGenerator generator
                = new StandardPieSectionLabelGenerator();
        PiePlot p1 = new PiePlot();
        p1.setLegendLabelGenerator(generator);
        PiePlot p2 = null;
        try {
            p2 = (PiePlot) p1.clone();
        }
        catch (CloneNotSupportedException e) {
            e.printStackTrace();
        }
        assertTrue(p1 != p2);
        assertTrue(p1.getClass() == p2.getClass());
        assertTrue(p1.equals(p2));

        // change the generator and make sure it only affects p1
        generator.getNumberFormat().setMinimumFractionDigits(2);
        assertFalse(p1.equals(p2));
    }

    /**
     * Check cloning of the legendLabelToolTipGenerator field.
     */
    public void testCloning_LegendLabelToolTipGenerator() {
        StandardPieSectionLabelGenerator generator
                = new StandardPieSectionLabelGenerator();
        PiePlot p1 = new PiePlot();
        p1.setLegendLabelToolTipGenerator(generator);
        PiePlot p2 = null;
        try {
            p2 = (PiePlot) p1.clone();
        }
        catch (CloneNotSupportedException e) {
            e.printStackTrace();
        }
        assertTrue(p1 != p2);
        assertTrue(p1.getClass() == p2.getClass());
        assertTrue(p1.equals(p2));

        // change the generator and make sure it only affects p1
        generator.getNumberFormat().setMinimumFractionDigits(2);
        assertFalse(p1.equals(p2));
    }

    /**
     * Check cloning of the legendLabelURLGenerator field.
     */
    public void testCloning_LegendLabelURLGenerator() {
        CustomPieURLGenerator generator = new CustomPieURLGenerator();
        PiePlot p1 = new PiePlot();
        p1.setLegendLabelURLGenerator(generator);
        PiePlot p2 = null;
        try {
            p2 = (PiePlot) p1.clone();
        }
        catch (CloneNotSupportedException e) {
            e.printStackTrace();
        }
        assertTrue(p1 != p2);
        assertTrue(p1.getClass() == p2.getClass());
        assertTrue(p1.equals(p2));

        // check that the URL generator has been cloned
        assertTrue(p1.getLegendLabelURLGenerator()
                != p2.getLegendLabelURLGenerator());
    }

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

    /**
     * Some checks for the getLegendItems() method.
     */
    public void testGetLegendItems() {
        DefaultPieDataset dataset = new DefaultPieDataset();
        dataset.setValue("Item 1", 1.0);
        dataset.setValue("Item 2", 2.0);
        dataset.setValue("Item 3", 0.0);
        dataset.setValue("Item 4", null);

        PiePlot plot = new PiePlot(dataset);
        plot.setIgnoreNullValues(false);
        plot.setIgnoreZeroValues(false);
        LegendItemCollection items = plot.getLegendItems();
        assertEquals(4, items.getItemCount());

        // check that null items are ignored if requested
        plot.setIgnoreNullValues(true);
        items = plot.getLegendItems();
        assertEquals(3, items.getItemCount());

        // check that zero items are ignored if requested
        plot.setIgnoreZeroValues(true);
        items = plot.getLegendItems();
        assertEquals(2, items.getItemCount());

        // check that negative items are always ignored
        dataset.setValue("Item 5", -1.0);
        items = plot.getLegendItems();
        assertEquals(2, items.getItemCount());
    }

    /**
     * Check that the default base section paint is not null, and that you
     * can never set it to null.
     */
    public void testGetBaseSectionPaint() {
        PiePlot plot = new PiePlot();
        assertNotNull(plot.getBaseSectionPaint());

        boolean pass = false;
        try {
            plot.setBaseSectionPaint(null);
        }
        catch (IllegalArgumentException e) {
            pass = true;
        }
        assertTrue(pass);
    }

    static class NullLegendLabelGenerator implements PieSectionLabelGenerator {
        public AttributedString generateAttributedSectionLabel(
                PieDataset dataset, Comparable key) {
            return null;
        }
        public String generateSectionLabel(PieDataset dataset, Comparable key) {
            return null;
        }
    }

    /**
     * Draws a pie chart where the label generator returns null.
     */
    public void testDrawWithNullLegendLabels() {
        DefaultPieDataset dataset = new DefaultPieDataset();
        dataset.setValue("L1", 12.0);
        dataset.setValue("L2", 11.0);
        JFreeChart chart = ChartFactory.createPieChart("Test", dataset, true,
                false, false);
        PiePlot plot = (PiePlot) chart.getPlot();
        plot.setLegendLabelGenerator(new NullLegendLabelGenerator());
        boolean success = false;
        try {
            BufferedImage image = new BufferedImage(200 , 100,
                    BufferedImage.TYPE_INT_RGB);
            Graphics2D g2 = image.createGraphics();
            chart.draw(g2, new Rectangle2D.Double(0, 0, 200, 100), null, null);
            g2.dispose();
            success = true;
        }
        catch (Exception e) {
          success = false;
        }
        assertTrue(success);
    }

}

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