jfreecharttests.java

java图形利器

/* ===========================================================
 * JFreeChart : a free chart library for the Java(tm) platform
 * ===========================================================
 *
 * (C) Copyright 2000-2007, 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.]
 *
 * --------------------
 * JFreeChartTests.java
 * --------------------
 * (C) Copyright 2002-2007, by Object Refinery Limited.
 *
 * Original Author:  David Gilbert (for Object Refinery Limited);
 * Contributor(s):   -;
 *
 * $Id: JFreeChartTests.java,v 1.1.2.5 2007/06/05 15:41:39 mungady Exp $
 *
 * Changes:
 * --------
 * 11-Jun-2002 : Version 1 (DG);
 * 17-Oct-2002 : Fixed errors reported by Checkstyle (DG);
 * 23-Sep-2003 : Removed null title test, since TM has added code to ensure 
 *               null titles cannot be created (DG);
 * 24-Nov-2005 : Removed OldLegend (DG);
 * 16-May-2007 : Added some new tests (DG);
 *
 */

package org.jfree.chart.junit;

import java.awt.BasicStroke;
import java.awt.Color;
import java.awt.Font;
import java.awt.GradientPaint;
import java.awt.RenderingHints;
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.util.List;

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.event.ChartChangeEvent;
import org.jfree.chart.event.ChartChangeListener;
import org.jfree.chart.plot.PiePlot;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.chart.plot.RingPlot;
import org.jfree.chart.title.LegendTitle;
import org.jfree.chart.title.TextTitle;
import org.jfree.chart.title.Title;
import org.jfree.data.category.DefaultCategoryDataset;
import org.jfree.data.general.DefaultPieDataset;
import org.jfree.data.time.Day;
import org.jfree.data.time.RegularTimePeriod;
import org.jfree.data.time.TimeSeries;
import org.jfree.data.time.TimeSeriesCollection;
import org.jfree.ui.Align;
import org.jfree.ui.RectangleEdge;
import org.jfree.ui.RectangleInsets;

/**
 * Tests for the {@link JFreeChart} class.
 */
public class JFreeChartTests extends TestCase implements ChartChangeListener {

    /** A pie chart. */
    private JFreeChart pieChart;

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

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

    /**
     * Common test setup.
     */
    protected void setUp() {

        // create a dataset...
        DefaultPieDataset data = new DefaultPieDataset();
        data.setValue("Java", new Double(43.2));
        data.setValue("Visual Basic", new Double(0.0));
        data.setValue("C/C++", new Double(17.5));

        // create the chart...
        this.pieChart = ChartFactory.createPieChart(
            "Pie Chart",  // chart title
            data,         // data
            true,         // include legend
            true,
            false
        );

    }
    
    /**
     * Check that the equals() method can distinguish all fields.
     */
    public void testEquals() {
        JFreeChart chart1 = new JFreeChart("Title", 
                new Font("SansSerif", Font.PLAIN, 12), new PiePlot(), true);
        JFreeChart chart2 = new JFreeChart("Title", 
                new Font("SansSerif", Font.PLAIN, 12), new PiePlot(), true);
        assertTrue(chart1.equals(chart2));
        assertTrue(chart2.equals(chart1));
        
        // renderingHints
        chart1.setRenderingHints(new RenderingHints(
                RenderingHints.KEY_TEXT_ANTIALIASING, 
                RenderingHints.VALUE_TEXT_ANTIALIAS_ON));
        assertFalse(chart1.equals(chart2));
        chart2.setRenderingHints(new RenderingHints(
                RenderingHints.KEY_TEXT_ANTIALIASING, 
                RenderingHints.VALUE_TEXT_ANTIALIAS_ON));
        assertTrue(chart1.equals(chart2));
        
        // borderVisible
        chart1.setBorderVisible(true);
        assertFalse(chart1.equals(chart2));
        chart2.setBorderVisible(true);
        assertTrue(chart1.equals(chart2));
        
        // borderStroke
        BasicStroke s = new BasicStroke(2.0f);
        chart1.setBorderStroke(s);
        assertFalse(chart1.equals(chart2));
        chart2.setBorderStroke(s);
        assertTrue(chart1.equals(chart2));
        
        // borderPaint
        chart1.setBorderPaint(Color.red);
        assertFalse(chart1.equals(chart2));
        chart2.setBorderPaint(Color.red);
        assertTrue(chart1.equals(chart2));
        
        // padding
        chart1.setPadding(new RectangleInsets(1, 2, 3, 4));
        assertFalse(chart1.equals(chart2));
        chart2.setPadding(new RectangleInsets(1, 2, 3, 4));
        assertTrue(chart1.equals(chart2));
        
        // title
        chart1.setTitle("XYZ");
        assertFalse(chart1.equals(chart2));
        chart2.setTitle("XYZ");
        assertTrue(chart1.equals(chart2));
        
        // subtitles
        chart1.addSubtitle(new TextTitle("Subtitle"));
        assertFalse(chart1.equals(chart2));
        chart2.addSubtitle(new TextTitle("Subtitle"));
        assertTrue(chart1.equals(chart2));
        
        // plot
        chart1 = new JFreeChart("Title", 
                new Font("SansSerif", Font.PLAIN, 12), new RingPlot(), false);
        chart2 = new JFreeChart("Title", 
                new Font("SansSerif", Font.PLAIN, 12), new PiePlot(), false);
        assertFalse(chart1.equals(chart2));
        chart2 = new JFreeChart("Title", 
                new Font("SansSerif", Font.PLAIN, 12), new RingPlot(), false);
        assertTrue(chart1.equals(chart2));
        
        // backgroundPaint
        chart1.setBackgroundPaint(new GradientPaint(1.0f, 2.0f, Color.red, 
                3.0f, 4.0f, Color.blue));
        assertFalse(chart1.equals(chart2));
        chart2.setBackgroundPaint(new GradientPaint(1.0f, 2.0f, Color.red, 
                3.0f, 4.0f, Color.blue));
        assertTrue(chart1.equals(chart2));
        
        // backgroundImage
        chart1.setBackgroundImage(JFreeChart.INFO.getLogo());
        assertFalse(chart1.equals(chart2));
        chart2.setBackgroundImage(JFreeChart.INFO.getLogo());
        assertTrue(chart1.equals(chart2));
        
        // backgroundImageAlignment
        chart1.setBackgroundImageAlignment(Align.BOTTOM_LEFT);
        assertFalse(chart1.equals(chart2));
        chart2.setBackgroundImageAlignment(Align.BOTTOM_LEFT);
        assertTrue(chart1.equals(chart2));
        
        // backgroundImageAlpha
        chart1.setBackgroundImageAlpha(0.1f);
        assertFalse(chart1.equals(chart2));
        chart2.setBackgroundImageAlpha(0.1f);
        assertTrue(chart1.equals(chart2));
    }

    /**
     * A test to make sure that the legend is being picked up in the
     * equals() testing.
     */
    public void testEquals2() {
        JFreeChart chart1 = new JFreeChart("Title", 
                new Font("SansSerif", Font.PLAIN, 12), new PiePlot(), true);
        JFreeChart chart2 = new JFreeChart("Title", 
                new Font("SansSerif", Font.PLAIN, 12), new PiePlot(), false);
        assertFalse(chart1.equals(chart2));
        assertFalse(chart2.equals(chart1));
    }
    
    /**
     * Checks the subtitle count - should be 1 (the legend).
     */
    public void testSubtitleCount() {
        int count = this.pieChart.getSubtitleCount();
        assertEquals(1, count);
    }
    
    /**
     * Some checks for the getSubtitle() method.
     */
    public void testGetSubtitle() {
        DefaultPieDataset dataset = new DefaultPieDataset();
        JFreeChart chart = ChartFactory.createPieChart("title", dataset, true, 
                false, false);
        Title t = chart.getSubtitle(0);
        assertTrue(t instanceof LegendTitle);
        
        boolean pass = false;
        try {
            t = chart.getSubtitle(-1);
        }
        catch (IllegalArgumentException e) {
            pass = true;
        }
        assertTrue(pass);
        
        pass = false;
        try {
            t = chart.getSubtitle(1);
        }
        catch (IllegalArgumentException e) {
            pass = true;
        }
        assertTrue(pass);

        pass = false;