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jfreechart example source code file (LookupPaintScaleTests.java)

This example jfreechart source code file (LookupPaintScaleTests.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - jfreechart tags/keywords

awt, bytearrayoutputstream, bytearrayoutputstream, clonenotsupportedexception, epsilon, epsilon, exception, io, lookuppaintscale, lookuppaintscale, lookuppaintscaletests, lookuppaintscaletests, objectinput, objectinputstream, objectoutput, objectoutputstream

The jfreechart LookupPaintScaleTests.java source code

/* ===========================================================
 * JFreeChart : a free chart library for the Java(tm) platform
 * ===========================================================
 *
 * (C) Copyright 2000-2008, 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 2006-2008, 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));
    }

}

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