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jfreechart example source code file (XYBlockRendererTests.java)

This example jfreechart source code file (XYBlockRendererTests.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, defaultxyzdataset, defaultxyzdataset, io, lookuppaintscale, lookuppaintscale, objectinput, range, test, testcase, xyblockrenderer, xyblockrenderer, xyblockrenderertests

The jfreechart XYBlockRendererTests.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.]
 *
 * -------------------------
 * XYBlockRendererTests.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);
 * 09-Mar-2007 : Added independence check to testCloning (DG);
 * 22-Apr-2008 : Added testPublicCloneable (DG);
 *
 */

package org.jfree.chart.renderer.xy.junit;

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.renderer.GrayPaintScale;
import org.jfree.chart.renderer.LookupPaintScale;
import org.jfree.chart.renderer.xy.XYBlockRenderer;
import org.jfree.data.Range;
import org.jfree.data.xy.DefaultXYZDataset;
import org.jfree.util.PublicCloneable;

/**
 * Tests for the {@link XYBlockRenderer} class.
 */
public class XYBlockRendererTests extends TestCase {

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

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

    /**
     * Test that the equals() method distinguishes all fields.
     */
    public void testEquals() {

        // default instances
        XYBlockRenderer r1 = new XYBlockRenderer();
        XYBlockRenderer r2 = new XYBlockRenderer();
        assertTrue(r1.equals(r2));
        assertTrue(r2.equals(r1));

        // blockHeight
        r1.setBlockHeight(2.0);
        assertFalse(r1.equals(r2));
        r2.setBlockHeight(2.0);
        assertTrue(r1.equals(r2));

        // blockWidth
        r1.setBlockWidth(2.0);
        assertFalse(r1.equals(r2));
        r2.setBlockWidth(2.0);
        assertTrue(r1.equals(r2));

        // paintScale
        r1.setPaintScale(new GrayPaintScale(0.0, 1.0));
        assertFalse(r1.equals(r2));
        r2.setPaintScale(new GrayPaintScale(0.0, 1.0));
        assertTrue(r1.equals(r2));

    }

    /**
     * Two objects that are equal are required to return the same hashCode.
     */
    public void testHashcode() {
        XYBlockRenderer r1 = new XYBlockRenderer();
        XYBlockRenderer r2 = new XYBlockRenderer();
        assertTrue(r1.equals(r2));
        int h1 = r1.hashCode();
        int h2 = r2.hashCode();
        assertEquals(h1, h2);
    }

    /**
     * Confirm that cloning works.
     */
    public void testCloning() {
        XYBlockRenderer r1 = new XYBlockRenderer();
        LookupPaintScale scale1 = new LookupPaintScale();
        r1.setPaintScale(scale1);
        XYBlockRenderer r2 = null;
        try {
            r2 = (XYBlockRenderer) r1.clone();
        }
        catch (CloneNotSupportedException e) {
            e.printStackTrace();
        }
        assertTrue(r1 != r2);
        assertTrue(r1.getClass() == r2.getClass());
        assertTrue(r1.equals(r2));

        // check independence
        scale1.add(0.5, Color.red);
        assertFalse(r1.equals(r2));
        LookupPaintScale scale2 = (LookupPaintScale) r2.getPaintScale();
        scale2.add(0.5, Color.red);
        assertTrue(r1.equals(r2));
    }

    /**
     * Verify that this class implements {@link PublicCloneable}.
     */
    public void testPublicCloneable() {
        XYBlockRenderer r1 = new XYBlockRenderer();
        assertTrue(r1 instanceof PublicCloneable);
    }

    /**
     * Serialize an instance, restore it, and check for equality.
     */
    public void testSerialization() {
        XYBlockRenderer r1 = new XYBlockRenderer();
        XYBlockRenderer r2 = null;
        try {
            ByteArrayOutputStream buffer = new ByteArrayOutputStream();
            ObjectOutput out = new ObjectOutputStream(buffer);
            out.writeObject(r1);
            out.close();

            ObjectInput in = new ObjectInputStream(
                    new ByteArrayInputStream(buffer.toByteArray()));
            r2 = (XYBlockRenderer) in.readObject();
            in.close();
        }
        catch (Exception e) {
            e.printStackTrace();
        }
        assertEquals(r1, r2);
    }

    /**
     * A simple test for bug 1766646.
     */
    public void testBug1766646A() {
        XYBlockRenderer r = new XYBlockRenderer();
        Range range = r.findDomainBounds(null);
        assertTrue(range == null);
        DefaultXYZDataset emptyDataset = new DefaultXYZDataset();
        range = r.findDomainBounds(emptyDataset);
        assertTrue(range == null);
    }

    /**
     * A simple test for bug 1766646.
     */
    public void testBug1766646B() {
        XYBlockRenderer r = new XYBlockRenderer();
        Range range = r.findRangeBounds(null);
        assertTrue(range == null);
        DefaultXYZDataset emptyDataset = new DefaultXYZDataset();
        range = r.findRangeBounds(emptyDataset);
        assertTrue(range == null);
    }

}

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