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jfreechart example source code file (DialPointerTests.java)

This example jfreechart source code file (DialPointerTests.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, dialpointer, dialpointer, dialpointertests, exception, io, mydiallayerchangelistener, mydiallayerchangelistener, objectinput, objectinputstream, objectinputstream, objectoutput, objectoutputstream

The jfreechart DialPointerTests.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.]
 *
 * ---------------------
 * DialPointerTests.java
 * ---------------------
 * (C) Copyright 2007, 2008, by Object Refinery Limited and Contributors.
 *
 * Original Author:  David Gilbert (for Object Refinery Limited);
 * Contributor(s):   -;
 *
 * Changes
 * -------
 * 30-Apr-2007 : Version 1 (DG);
 * 23-Nov-2007 : Added testEqualsPointer() and testSerialization2() (DG);
 *
 */

package org.jfree.chart.plot.dial.junit;

import java.awt.BasicStroke;
import java.awt.Color;
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.plot.dial.DialPointer;

/**
 * Tests for the {@link DialPointer} class.
 */
public class DialPointerTests extends TestCase {

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

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

    /**
     * Confirm that the equals method can distinguish all the required fields.
     */
    public void testEquals() {
        DialPointer i1 = new DialPointer.Pin(1);
        DialPointer i2 = new DialPointer.Pin(1);
        assertTrue(i1.equals(i2));

        // dataset index
        i1 = new DialPointer.Pin(2);
        assertFalse(i1.equals(i2));
        i2 = new DialPointer.Pin(2);
        assertTrue(i1.equals(i2));

        // check an inherited attribute
        i1.setVisible(false);
        assertFalse(i1.equals(i2));
        i2.setVisible(false);
        assertTrue(i1.equals(i2));
    }

    /**
     * Check the equals() method for the DialPointer.Pin class.
     */
    public void testEqualsPin() {
        DialPointer.Pin p1 = new DialPointer.Pin();
        DialPointer.Pin p2 = new DialPointer.Pin();
        assertEquals(p1, p2);

        p1.setPaint(Color.green);
        assertFalse(p1.equals(p2));
        p2.setPaint(Color.green);
        assertTrue(p1.equals(p2));

        BasicStroke s = new BasicStroke(4.4f);
        p1.setStroke(s);
        assertFalse(p1.equals(p2));
        p2.setStroke(s);
        assertTrue(p1.equals(p2));
    }

    /**
     * Check the equals() method for the DialPointer.Pointer class.
     */
    public void testEqualsPointer() {
        DialPointer.Pointer p1 = new DialPointer.Pointer();
        DialPointer.Pointer p2 = new DialPointer.Pointer();
        assertEquals(p1, p2);

        p1.setFillPaint(Color.green);
        assertFalse(p1.equals(p2));
        p2.setFillPaint(Color.green);
        assertTrue(p1.equals(p2));

        p1.setOutlinePaint(Color.green);
        assertFalse(p1.equals(p2));
        p2.setOutlinePaint(Color.green);
        assertTrue(p1.equals(p2));
    }

    /**
     * Two objects that are equal are required to return the same hashCode.
     */
    public void testHashCode() {
        DialPointer i1 = new DialPointer.Pin(1);
        DialPointer i2 = new DialPointer.Pin(1);
        assertTrue(i1.equals(i2));
        int h1 = i1.hashCode();
        int h2 = i2.hashCode();
        assertEquals(h1, h2);
    }

    /**
     * Confirm that cloning works.
     */
    public void testCloning() {
        DialPointer i1 = new DialPointer.Pin(1);
        DialPointer i2 = null;
        try {
            i2 = (DialPointer) i1.clone();
        }
        catch (CloneNotSupportedException e) {
            e.printStackTrace();
        }
        assertTrue(i1 != i2);
        assertTrue(i1.getClass() == i2.getClass());
        assertTrue(i1.equals(i2));

        // check that the listener lists are independent
        MyDialLayerChangeListener l1 = new MyDialLayerChangeListener();
        i1.addChangeListener(l1);
        assertTrue(i1.hasListener(l1));
        assertFalse(i2.hasListener(l1));
    }

    /**
     * Serialize an instance, restore it, and check for equality.
     */
    public void testSerialization() {
        // test a default instance
        DialPointer i1 = new DialPointer.Pin(1);
        DialPointer i2 = null;

        try {
            ByteArrayOutputStream buffer = new ByteArrayOutputStream();
            ObjectOutput out = new ObjectOutputStream(buffer);
            out.writeObject(i1);
            out.close();

            ObjectInput in = new ObjectInputStream(
                    new ByteArrayInputStream(buffer.toByteArray()));
            i2 = (DialPointer) in.readObject();
            in.close();
        }
        catch (Exception e) {
            e.printStackTrace();
        }
        assertEquals(i1, i2);

        // test a custom instance
    }

    /**
     * Serialize an instance, restore it, and check for equality.
     */
    public void testSerialization2() {
        // test a default instance
        DialPointer i1 = new DialPointer.Pointer(1);
        DialPointer i2 = null;

        try {
            ByteArrayOutputStream buffer = new ByteArrayOutputStream();
            ObjectOutput out = new ObjectOutputStream(buffer);
            out.writeObject(i1);
            out.close();

            ObjectInput in = new ObjectInputStream(
                    new ByteArrayInputStream(buffer.toByteArray()));
            i2 = (DialPointer) in.readObject();
            in.close();
        }
        catch (Exception e) {
            e.printStackTrace();
        }
        assertEquals(i1, i2);

        // test a custom instance
    }
}

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