lookuppaintscaletests.java

JFreeChart是做统计图表的,、混合图、甘特图以及一些仪表盘

/* ===========================================================
 * 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.]
 *
 * --------------------------
 * LookupPaintScaleTests.java
 * --------------------------
 * (C) Copyright 2006, 2007, by Object Refinery Limited and Contributors.
 *
 * Original Author:  David Gilbert (for Object Refinery Limited);
 * Contributor(s):   -;
 *
 * Changes
 * -------
 * 05-Jul-2006 : Version 1 (DG);
 * 31-Jan-2007 : Additional serialization tests (DG);
 * 07-Mar-2007 : Added new tests (DG);
 * 09-Mar-2007 : Check independence in testCloning() (DG);
 *
 */

package org.jfree.chart.renderer.junit;

import java.awt.Color;
import java.awt.GradientPaint;
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.renderer.LookupPaintScale;

/**
 * Tests for the {@link LookupPaintScale} class.
 */
public class LookupPaintScaleTests extends TestCase {

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

    /**
     * Constructs a new set of tests.
     *
     * @param name  the name of the tests.
     */
    public LookupPaintScaleTests(String name) {
        super(name);
    }
    
    /**
     * A test for the equals() method.
     */
    public void testEquals() {
        LookupPaintScale g1 = new LookupPaintScale();
        LookupPaintScale g2 = new LookupPaintScale();
        assertTrue(g1.equals(g2));
        assertTrue(g2.equals(g1));
        
        g1 = new LookupPaintScale(1.0, 2.0, Color.red);
        assertFalse(g1.equals(g2));
        g2 = new LookupPaintScale(1.0, 2.0, Color.red);
        assertTrue(g1.equals(g2));
        
        g1.add(new Double(1.5), new GradientPaint(1.0f, 2.0f, Color.red, 3.0f, 
                4.0f, Color.blue));
        assertFalse(g1.equals(g2));
        g2.add(new Double(1.5), new GradientPaint(1.0f, 2.0f, Color.red, 3.0f, 
                4.0f, Color.blue));
        assertTrue(g1.equals(g2));
    }
    
    /**
     * Confirm that cloning works.
     */
    public void testCloning() {
        LookupPaintScale g1 = new LookupPaintScale();
        LookupPaintScale g2 = null;
        try {
            g2 = (LookupPaintScale) g1.clone();
        }
        catch (CloneNotSupportedException e) {
            e.printStackTrace();
        }
        assertTrue(g1 != g2);
        assertTrue(g1.getClass() == g2.getClass());
        assertTrue(g1.equals(g2));
        
        // check independence
        g1.add(new Double(0.5), Color.red);
        assertFalse(g1.equals(g2));
        g2.add(new Double(0.5), Color.red);
        assertTrue(g1.equals(g2));
        
        // try with gradient paint
        g1 = new LookupPaintScale(1.0, 2.0, new GradientPaint(1.0f, 2.0f, 
                Color.red, 3.0f, 4.0f, Color.green));
        g1.add(new Double(1.5), new GradientPaint(1.0f, 2.0f, Color.red, 3.0f, 
                4.0f, Color.blue));
        g2 = null;
        try {
            g2 = (LookupPaintScale) g1.clone();
        }
        catch (CloneNotSupportedException e) {
            e.printStackTrace();
        }
        assertTrue(g1 != g2);
        assertTrue(g1.getClass() == g2.getClass());
        assertTrue(g1.equals(g2));
    }
    
    /**
     * Serialize an instance, restore it, and check for equality.
     */
    public void testSerialization() {
        LookupPaintScale g1 = new LookupPaintScale();
        LookupPaintScale 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 = (LookupPaintScale) in.readObject();
            in.close();
        }
        catch (Exception e) {
            e.printStackTrace();
        }
        assertEquals(g1, g2);       
        
        g1 = new LookupPaintScale(1.0, 2.0, new GradientPaint(1.0f, 2.0f, 
                Color.red, 3.0f, 4.0f, Color.yellow));
        g1.add(new Double(1.5), new GradientPaint(1.1f, 2.2f, Color.red, 3.3f, 
                4.4f, Color.blue));
        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 = (LookupPaintScale) in.readObject();
            in.close();
        }
        catch (Exception e) {
            e.printStackTrace();
        }
        assertEquals(g1, g2);   
    }
    
    private static final double EPSILON = 0.0000000001;
    
    /**
     * Some checks for the default constructor.
     */
    public void testConstructor1() {
        LookupPaintScale s = new LookupPaintScale();
        assertEquals(0.0, s.getLowerBound(), EPSILON);
        assertEquals(1.0, s.getUpperBound(), EPSILON);
    }
    
    /**
     * Some checks for the other constructor.
     */
    public void testConstructor2() {
        LookupPaintScale s = new LookupPaintScale(1.0, 2.0, Color.red);
        assertEquals(1.0, s.getLowerBound(), EPSILON);
        assertEquals(2.0, s.getUpperBound(), EPSILON);
        assertEquals(Color.red, s.getDefaultPaint());
    }
    
    /**
     * Some general checks for the lookup table.
     */
    public void testGeneral() {
        
        LookupPaintScale s = new LookupPaintScale(0.0, 100.0, Color.black);
        assertEquals(Color.black, s.getPaint(-1.0));
        assertEquals(Color.black, s.getPaint(0.0));
        assertEquals(Color.black, s.getPaint(50.0));
        assertEquals(Color.black, s.getPaint(100.0));
        assertEquals(Color.black, s.getPaint(101.0));
        
        s.add(new Double(50.0), Color.blue);
        assertEquals(Color.black, s.getPaint(-1.0));
        assertEquals(Color.black, s.getPaint(0.0));
        assertEquals(Color.blue, s.getPaint(50.0));
        assertEquals(Color.blue, s.getPaint(100.0));
        assertEquals(Color.black, s.getPaint(101.0));
        
        s.add(new Double(50.0), Color.red);
        assertEquals(Color.black, s.getPaint(-1.0));
        assertEquals(Color.black, s.getPaint(0.0));
        assertEquals(Color.red, s.getPaint(50.0));
        assertEquals(Color.red, s.getPaint(100.0));
        assertEquals(Color.black, s.getPaint(101.0));
        
        s.add(new Double(25.0), Color.green);
        assertEquals(Color.black, s.getPaint(-1.0));
        assertEquals(Color.black, s.getPaint(0.0));
        assertEquals(Color.green, s.getPaint(25.0));
        assertEquals(Color.red, s.getPaint(50.0));
        assertEquals(Color.red, s.getPaint(100.0));
        assertEquals(Color.black, s.getPaint(101.0));
        
        s.add(new Double(75.0), Color.yellow);
        assertEquals(Color.black, s.getPaint(-1.0));
        assertEquals(Color.black, s.getPaint(0.0));
        assertEquals(Color.green, s.getPaint(25.0));
        assertEquals(Color.red, s.getPaint(50.0));
        assertEquals(Color.yellow, s.getPaint(75.0));
        assertEquals(Color.yellow, s.getPaint(100.0));
        assertEquals(Color.black, s.getPaint(101.0));
    }

}