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jfreechart example source code file (FastScatterPlotTests.java)

This example jfreechart source code file (FastScatterPlotTests.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, bytearrayinputstream, bytearrayoutputstream, bytearrayoutputstream, fastscatterplot, fastscatterplot, fastscatterplottests, io, jfreechart, numberaxis, numberaxis, stroke, valueaxis, valueaxis, x, y

The jfreechart FastScatterPlotTests.java source code

/* ===========================================================
 * JFreeChart : a free chart library for the Java(tm) platform
 * ===========================================================
 *
 * (C) Copyright 2000-2009, 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.]
 *
 * -------------------------
 * FastScatterPlotTests.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);
 * 29-Jan-2009 : Updated testEquals() (DG);
 * 26-Mar-2009 : Updated testEquals() for new panning fields (DG);
 *
 */

package org.jfree.chart.plot.junit;

import java.awt.BasicStroke;
import java.awt.Color;
import java.awt.GradientPaint;
import java.awt.Stroke;
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.JFreeChart;
import org.jfree.chart.axis.NumberAxis;
import org.jfree.chart.axis.ValueAxis;
import org.jfree.chart.plot.FastScatterPlot;

/**
 * Tests for the {@link FastScatterPlot} class.
 */
public class FastScatterPlotTests extends TestCase {

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

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

    /**
     * Some checks for the equals() method.
     */
    public void testEquals() {

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

        plot1.setPaint(new GradientPaint(1.0f, 2.0f, Color.red,
                3.0f, 4.0f, Color.yellow));
        assertFalse(plot1.equals(plot2));
        plot2.setPaint(new GradientPaint(1.0f, 2.0f, Color.red,
                3.0f, 4.0f, Color.yellow));
        assertTrue(plot1.equals(plot2));

        plot1.setDomainGridlinesVisible(false);
        assertFalse(plot1.equals(plot2));
        plot2.setDomainGridlinesVisible(false);
        assertTrue(plot1.equals(plot2));

        plot1.setDomainGridlinePaint(new GradientPaint(1.0f, 2.0f, Color.blue,
                3.0f, 4.0f, Color.yellow));
        assertFalse(plot1.equals(plot2));
        plot2.setDomainGridlinePaint(new GradientPaint(1.0f, 2.0f, Color.blue,
                3.0f, 4.0f, Color.yellow));
        assertTrue(plot1.equals(plot2));

        Stroke s = new BasicStroke(1.5f);
        plot1.setDomainGridlineStroke(s);
        assertFalse(plot1.equals(plot2));
        plot2.setDomainGridlineStroke(s);
        assertTrue(plot1.equals(plot2));

        plot1.setRangeGridlinesVisible(false);
        assertFalse(plot1.equals(plot2));
        plot2.setRangeGridlinesVisible(false);
        assertTrue(plot1.equals(plot2));

        plot1.setRangeGridlinePaint(new GradientPaint(1.0f, 2.0f, Color.green,
                3.0f, 4.0f, Color.yellow));
        assertFalse(plot1.equals(plot2));
        plot2.setRangeGridlinePaint(new GradientPaint(1.0f, 2.0f, Color.green,
                3.0f, 4.0f, Color.yellow));
        assertTrue(plot1.equals(plot2));

        Stroke s2 = new BasicStroke(1.5f);
        plot1.setRangeGridlineStroke(s2);
        assertFalse(plot1.equals(plot2));
        plot2.setRangeGridlineStroke(s2);
        assertTrue(plot1.equals(plot2));

        plot1.setDomainPannable(true);
        assertFalse(plot1.equals(plot2));
        plot2.setDomainPannable(true);
        assertTrue(plot1.equals(plot2));

        plot1.setRangePannable(true);
        assertFalse(plot1.equals(plot2));
        plot2.setRangePannable(true);
        assertTrue(plot1.equals(plot2));

    }

    /**
     * Some tests for the data array equality in the equals() method.
     */
    public void testEquals2() {
        FastScatterPlot plot1 = new FastScatterPlot();
        FastScatterPlot plot2 = new FastScatterPlot();
        assertTrue(plot1.equals(plot2));
        assertTrue(plot2.equals(plot1));

        float[][] a = new float[2][];
        float[][] b = new float[2][];
        plot1.setData(a);
        assertFalse(plot1.equals(plot2));
        plot2.setData(b);
        assertTrue(plot1.equals(plot2));

        a[0] = new float[6];
        assertFalse(plot1.equals(plot2));
        b[0] = new float[6];
        assertTrue(plot1.equals(plot2));

        a[0][0] = 1.0f;
        assertFalse(plot1.equals(plot2));
        b[0][0] = 1.0f;
        assertTrue(plot1.equals(plot2));

        a[0][1] = Float.NaN;
        assertFalse(plot1.equals(plot2));
        b[0][1] = Float.NaN;
        assertTrue(plot1.equals(plot2));

        a[0][2] = Float.POSITIVE_INFINITY;
        assertFalse(plot1.equals(plot2));
        b[0][2] = Float.POSITIVE_INFINITY;
        assertTrue(plot1.equals(plot2));

        a[0][3] = Float.NEGATIVE_INFINITY;
        assertFalse(plot1.equals(plot2));
        b[0][3] = Float.NEGATIVE_INFINITY;
        assertTrue(plot1.equals(plot2));
    }

    /**
     * Confirm that cloning works.
     */
    public void testCloning() {
        FastScatterPlot p1 = new FastScatterPlot();
        FastScatterPlot p2 = null;
        try {
            p2 = (FastScatterPlot) 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() {
        float[][] data = createData();
        ValueAxis domainAxis = new NumberAxis("X");
        ValueAxis rangeAxis = new NumberAxis("Y");
        FastScatterPlot p1 = new FastScatterPlot(data, domainAxis, rangeAxis);
        FastScatterPlot 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 = (FastScatterPlot) in.readObject();
            in.close();
        }
        catch (Exception e) {
            e.printStackTrace();
        }
        assertEquals(p1, p2);
    }

    /**
     * Draws the chart with a <code>null info object to make sure that
     * no exceptions are thrown.
     */
    public void testDrawWithNullInfo() {
        boolean success = false;
        try {
            float[][] data = createData();

            ValueAxis domainAxis = new NumberAxis("X");
            ValueAxis rangeAxis = new NumberAxis("Y");
            FastScatterPlot plot = new FastScatterPlot(data, domainAxis,
                    rangeAxis);
            JFreeChart chart = new JFreeChart(plot);
            /* BufferedImage image = */ chart.createBufferedImage(300, 200,
                    null);
            success = true;
        }
        catch (NullPointerException e) {
            e.printStackTrace();
            success = false;
        }
        assertTrue(success);
    }

    /**
     * Populates the data array with random values.
     *
     * @return Random data.
     */
    private float[][] createData() {
        float[][] result = new float[2][1000];
        for (int i = 0; i < result[0].length; i++) {
            float x = (float) i + 100;
            result[0][i] = x;
            result[1][i] = 100 + (float) Math.random() * 1000;
        }
        return result;
    }

}

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