standardcategoryserieslabelgeneratortests.java

用于制作报表的中间件控件,纯java编写,还附带有数据库操作的源代码

/* ===========================================================
 * 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.]
 *
 * ----------------------------------------------
 * StandardCategorySeriesLabelGeneratorTests.java
 * ----------------------------------------------
 * (C) Copyright 2006, 2007, by Object Refinery Limited and Contributors.
 *
 * Original Author:  David Gilbert (for Object Refinery Limited);
 * Contributor(s):   -;
 *
 * Changes
 * -------
 * 03-May-2006 : Version 1 (DG);
 *
 */

package org.jfree.chart.labels.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.labels.StandardCategorySeriesLabelGenerator;
import org.jfree.data.category.DefaultCategoryDataset;

/**
 * Tests for the {@link StandardCategorySeriesLabelGenerator} class.
 */
public class StandardCategorySeriesLabelGeneratorTests extends TestCase {

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

    /**
     * Constructs a new set of tests.
     *
     * @param name  the name of the tests.
     */
    public StandardCategorySeriesLabelGeneratorTests(String name) {
        super(name);
    }
    
    /**
     * Some checks for the generalLabel() method.
     */
    public void testGenerateLabel() {
        StandardCategorySeriesLabelGenerator g 
            = new StandardCategorySeriesLabelGenerator("{0}");
        DefaultCategoryDataset dataset = new DefaultCategoryDataset();
        dataset.addValue(1.0, "R0", "C0");
        dataset.addValue(2.0, "R0", "C1");
        dataset.addValue(3.0, "R1", "C0");
        dataset.addValue(null, "R1", "C1");
        String s = g.generateLabel(dataset, 0);
        assertEquals("R0", s);
    }
    
    /**
     * Some checks for the equals() method.
     */
    public void testEquals() {
        StandardCategorySeriesLabelGenerator g1 
            = new StandardCategorySeriesLabelGenerator();
        StandardCategorySeriesLabelGenerator g2 
            = new StandardCategorySeriesLabelGenerator();
        assertTrue(g1.equals(g2));
        assertTrue(g2.equals(g1));
        
        g1 = new StandardCategorySeriesLabelGenerator("{1}");
        assertFalse(g1.equals(g2));
        g2 = new StandardCategorySeriesLabelGenerator("{1}");
        assertTrue(g1.equals(g2));        
    }

    /**
     * Confirm that cloning works.
     */
    public void testCloning() {
        StandardCategorySeriesLabelGenerator g1 
            = new StandardCategorySeriesLabelGenerator("{1}");
        StandardCategorySeriesLabelGenerator g2 = null;
        try {
            g2 = (StandardCategorySeriesLabelGenerator) g1.clone();
        }
        catch (CloneNotSupportedException e) {
            System.err.println("Failed to clone.");
        }
        assertTrue(g1 != g2);
        assertTrue(g1.getClass() == g2.getClass());
        assertTrue(g1.equals(g2));
    }

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

        StandardCategorySeriesLabelGenerator g1
            = new StandardCategorySeriesLabelGenerator("{2}");
        StandardCategorySeriesLabelGenerator 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 = (StandardCategorySeriesLabelGenerator) in.readObject();
            in.close();
        }
        catch (Exception e) {
            System.out.println(e.toString());
        }
        assertEquals(g1, g2);

    }

}