standardpieurlgeneratortests.java

JfreeChart 常用图表例子

/* ===========================================================
 * 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.]
 *
 * ---------------------------------
 * StandardPieURLGeneratorTests.java
 * ---------------------------------
 * (C) Copyright 2003-2005, by Object Refinery Limited and Contributors.
 *
 * Original Author:  David Gilbert (for Object Refinery Limited);
 * Contributor(s):   -;
 *
 * $Id: StandardPieURLGeneratorTests.java,v 1.4 2005/03/09 13:44:45 mungady Exp $
 *
 * Changes
 * -------
 * 21-Mar-2003 : Version 1 (DG);
 * 06-Jan-2003 : Added a test for URL generation (DG);
 *
 */

package org.jfree.chart.urls.junit;

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.urls.StandardPieURLGenerator;
import org.jfree.data.general.DefaultPieDataset;

/**
 * Tests for the {@link StandardPieURLGenerator} class.
 */
public class StandardPieURLGeneratorTests extends TestCase {

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

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

    /**
     * Serialize an instance, restore it, and check for equality.
     */
    public void testSerialization() {

        StandardPieURLGenerator g1 = new StandardPieURLGenerator(
            "index.html?", "cat"
        );
        StandardPieURLGenerator g2 = null;

        try {
            ByteArrayOutputStream buffer = new ByteArrayOutputStream();
            ObjectOutput out = new ObjectOutputStream(buffer);
            out.writeObject(g1);
            out.close();

            ObjectInput in = new ObjectInputStream(
                new ByteArrayInputStream(buffer.toByteArray())
            );
            g2 = (StandardPieURLGenerator) in.readObject();
            in.close();
        }
        catch (Exception e) {
            System.out.println(e.toString());
        }
        assertEquals(g1, g2);

    }

    /**
     * Test that the generated URL is as expected.
     */
    public void testURL() {
        DefaultPieDataset dataset = new DefaultPieDataset();
        dataset.setValue("Alpha", new Double(5.0));
        dataset.setValue("Beta", new Double(5.5));
        StandardPieURLGenerator g1 = new StandardPieURLGenerator(
            "chart.jsp", "category"
        );
        String url = g1.generateURL(dataset, "Beta", 0);
        assertEquals("chart.jsp?category=Beta&pieIndex=0", url);
    }
    
}