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jfreechart example source code file (StackedXYAreaRenderer2Tests.java)

This example jfreechart source code file (StackedXYAreaRenderer2Tests.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, bufferedimage, bytearrayoutputstream, bytearrayoutputstream, defaulttablexydataset, exception, geometry, image, io, jfreechart, numberaxis, stackedxyarearenderer2, stackedxyarearenderer2, stackedxyarearenderer2tests, test, test, xyplot, xyplot

The jfreechart StackedXYAreaRenderer2Tests.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.]
 *
 * -------------------------------
 * StackedXYAreaRenderer2Tests.java
 * -------------------------------
 * (C) Copyright 2005-2008, by Object Refinery Limited and Contributors.
 *
 * Original Author:  David Gilbert (for Object Refinery Limited);
 * Contributor(s):   -;
 *
 * Changes
 * -------
 * 06-Jan-2005 : Version 1 (DG);
 * 22-Aug-2006 : Added testDrawWithEmptyDataset() method (DG);
 * 30-Nov-2006 : Extended testEquals() (DG);
 * 22-Apr-2008 : Added testPublicCloneable (DG);
 *
 */

package org.jfree.chart.renderer.xy.junit;

import java.awt.Graphics2D;
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 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.axis.NumberAxis;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.chart.plot.XYPlot;
import org.jfree.chart.renderer.xy.StackedXYAreaRenderer2;
import org.jfree.data.Range;
import org.jfree.data.xy.DefaultTableXYDataset;
import org.jfree.data.xy.TableXYDataset;
import org.jfree.util.PublicCloneable;

/**
 * Tests for the {@link StackedXYAreaRenderer2} class.
 */
public class StackedXYAreaRenderer2Tests extends TestCase {

    /**
     * Returns the tests as a test suite.
     *
     * @return The test suite.
     */
    public static Test suite() {
        return new TestSuite(StackedXYAreaRenderer2Tests.class);
    }

    /**
     * Constructs a new set of tests.
     *
     * @param name  the name of the tests.
     */
    public StackedXYAreaRenderer2Tests(String name) {
        super(name);
    }

    /**
     * Test chart drawing with an empty dataset to ensure that this special
     * case doesn't cause any exceptions.
     */
    public void testDrawWithEmptyDataset() {
        boolean success = false;
        JFreeChart chart = ChartFactory.createStackedXYAreaChart("title", "x",
                "y", new DefaultTableXYDataset(), PlotOrientation.VERTICAL,
                true, false, false);
        XYPlot plot = (XYPlot) chart.getPlot();
        plot.setRenderer(new StackedXYAreaRenderer2());
        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);
    }

    /**
     * Test that the equals() method distinguishes all fields.
     */
    public void testEquals() {
        StackedXYAreaRenderer2 r1 = new StackedXYAreaRenderer2();
        StackedXYAreaRenderer2 r2 = new StackedXYAreaRenderer2();
        assertEquals(r1, r2);
        assertEquals(r2, r1);

        r1.setRoundXCoordinates(!r1.getRoundXCoordinates());
        assertFalse(r1.equals(r2));
        r2.setRoundXCoordinates(r1.getRoundXCoordinates());
        assertTrue(r1.equals(r2));
    }

    /**
     * Two objects that are equal are required to return the same hashCode.
     */
    public void testHashcode() {
        StackedXYAreaRenderer2 r1 = new StackedXYAreaRenderer2();
        StackedXYAreaRenderer2 r2 = new StackedXYAreaRenderer2();
        assertTrue(r1.equals(r2));
        int h1 = r1.hashCode();
        int h2 = r2.hashCode();
        assertEquals(h1, h2);
    }

    /**
     * Confirm that cloning works.
     */
    public void testCloning() {
        StackedXYAreaRenderer2 r1 = new StackedXYAreaRenderer2();
        StackedXYAreaRenderer2 r2 = null;
        try {
            r2 = (StackedXYAreaRenderer2) r1.clone();
        }
        catch (CloneNotSupportedException e) {
            e.printStackTrace();
        }
        assertTrue(r1 != r2);
        assertTrue(r1.getClass() == r2.getClass());
        assertTrue(r1.equals(r2));
    }

    /**
     * Verify that this class implements {@link PublicCloneable}.
     */
    public void testPublicCloneable() {
        StackedXYAreaRenderer2 r1 = new StackedXYAreaRenderer2();
        assertTrue(r1 instanceof PublicCloneable);
    }

    /**
     * Serialize an instance, restore it, and check for equality.
     */
    public void testSerialization() {
        StackedXYAreaRenderer2 r1 = new StackedXYAreaRenderer2();
        StackedXYAreaRenderer2 r2 = null;
        try {
            ByteArrayOutputStream buffer = new ByteArrayOutputStream();
            ObjectOutput out = new ObjectOutputStream(buffer);
            out.writeObject(r1);
            out.close();

            ObjectInput in = new ObjectInputStream(
                    new ByteArrayInputStream(buffer.toByteArray()));
            r2 = (StackedXYAreaRenderer2) in.readObject();
            in.close();
        }
        catch (Exception e) {
            e.printStackTrace();
        }
        assertEquals(r1, r2);
    }

    /**
     * Check that the renderer is calculating the range bounds correctly.
     */
    public void testFindRangeBounds() {
        TableXYDataset dataset
                = RendererXYPackageTests.createTestTableXYDataset();
        JFreeChart chart = ChartFactory.createStackedXYAreaChart(
                "Test Chart", "X", "Y", dataset, PlotOrientation.VERTICAL,
                false, false, false);
        XYPlot plot = (XYPlot) chart.getPlot();
        StackedXYAreaRenderer2 renderer = new StackedXYAreaRenderer2();
        plot.setRenderer(renderer);
        NumberAxis rangeAxis = (NumberAxis) plot.getRangeAxis();
        Range bounds = rangeAxis.getRange();
        assertTrue(bounds.contains(6.0));
        assertTrue(bounds.contains(8.0));

        // try null argument
        assertNull(renderer.findRangeBounds(null));

        // try empty dataset
        assertNull(renderer.findRangeBounds(new DefaultTableXYDataset()));
    }

}

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