/* ===========================================================
 * 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.]
 *
 * -----------------
 * PiePlotTests.java
 * -----------------
 * (C) Copyright 2003-2009, 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() (DG);
 * 10-Jul-2009 : Updated testEquals() (DG);
 *
 */

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.chart.util.DefaultShadowGenerator;
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));

        // shadowGenerator
        plot1.setShadowGenerator(new DefaultShadowGenerator(5, Color.gray,
                0.6f, 4, -Math.PI / 4));
        assertFalse(plot1.equals(plot2));
        plot2.setShadowGenerator(new DefaultShadowGenerator(5, Color.gray,
                0.6f, 4, -Math.PI / 4));
        assertTrue(plot1.equals(plot2));

        plot1.setShadowGenerator(null);
        assertFalse(plot1.equals(plot2));
        plot2.setShadowGenerator(null);
        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);
    }

}
