metercharttests.java

来自「JfreeChart 常用图表例子」· Java 代码 · 共 108 行

/* ===========================================================
 * JFreeChart : a free chart library for the Java(tm) platform
 * ===========================================================
 *
 * (C) Copyright 2000-2005, 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
 *
 * [Java is a trademark or registered trademark of Sun Microsystems, Inc. 
 * in the United States and other countries.]
 *
 * --------------------
 * MeterChartTests.java
 * --------------------
 * (C) Copyright 2005, by Object Refinery Limited.
 *
 * Original Author:  David Gilbert (for Object Refinery Limited);
 * Contributor(s):   -;
 *
 * $Id: MeterChartTests.java,v 1.1 2005/04/13 15:22:27 mungady Exp $
 *
 * Changes:
 * --------
 * 29-Mar-2005 : Version 1 (DG);
 *
 */

package org.jfree.chart.junit;

import java.awt.Graphics2D;
import java.awt.geom.Rectangle2D;
import java.awt.image.BufferedImage;

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

import org.jfree.chart.JFreeChart;
import org.jfree.chart.plot.MeterInterval;
import org.jfree.chart.plot.MeterPlot;
import org.jfree.data.Range;
import org.jfree.data.general.DefaultValueDataset;

/**
 * Miscellaneous checks for meter charts.
 */
public class MeterChartTests extends TestCase {

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

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

    /**
     * Draws the chart with a single range.  At one point, this caused a null
     * pointer exception (fixed now).
     */
    public void testDrawWithNullInfo() {
        boolean success = false;
        MeterPlot plot = new MeterPlot(new DefaultValueDataset(60.0));
        plot.addInterval(new MeterInterval("Normal", new Range(0.0, 80.0)));
        JFreeChart chart = new JFreeChart(plot);
        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);
    }

}