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jfreechart example source code file (CandlestickRendererTests.java)

This example jfreechart source code file (CandlestickRendererTests.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, candlestickrenderer, candlestickrenderer, candlestickrenderertests, clonenotsupportedexception, date, defaultohlcdataset, defaultohlcdataset, epsilon, io, objectinput, ohlcdataitem, ohlcdataitem, s1, s1, util

The jfreechart CandlestickRendererTests.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.]
 *
 * -----------------------------
 * CandlestickRendererTests.java
 * -----------------------------
 * (C) Copyright 2003-2008, by Object Refinery Limited and Contributors.
 *
 * Original Author:  David Gilbert (for Object Refinery Limited);
 * Contributor(s):   -;
 *
 * Changes
 * -------
 * 25-Mar-2003 : Version 1 (DG);
 * 22-Oct-2003 : Added hashCode test (DG);
 * 17-Aug-2006 : Strengthened testEquals() and added testFindRangeBounds()
 *               method (DG);
 * 05-Mar-2007 : Added new field to testEquals() (DG);
 * 08-Oct-2007 : Added tests for new volumePaint field (DG);
 * 22-Apr-2008 : Added testPublicCloneable() (DG);
 *
 */

package org.jfree.chart.renderer.xy.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 java.util.Date;

import junit.framework.Test;
import junit.framework.TestCase;
import junit.framework.TestSuite;

import org.jfree.chart.renderer.xy.CandlestickRenderer;
import org.jfree.data.Range;
import org.jfree.data.xy.DefaultOHLCDataset;
import org.jfree.data.xy.OHLCDataItem;
import org.jfree.data.xy.OHLCDataset;
import org.jfree.util.PublicCloneable;

/**
 * Tests for the {@link CandlestickRenderer} class.
 */
public class CandlestickRendererTests extends TestCase {

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

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

    private static final double EPSILON = 0.0000000001;

    /**
     * Some checks for the constructor.
     */
    public void testConstructor() {
        CandlestickRenderer r1 = new CandlestickRenderer();

        // check defaults
        assertEquals(Color.green, r1.getUpPaint());
        assertEquals(Color.red, r1.getDownPaint());
        assertFalse(r1.getUseOutlinePaint());
        assertTrue(r1.getDrawVolume());
        assertEquals(Color.gray, r1.getVolumePaint());
        assertEquals(-1.0, r1.getCandleWidth(), EPSILON);
    }

    /**
     * Check that the equals() method distinguishes all fields.
     */
    public void testEquals() {
        CandlestickRenderer r1 = new CandlestickRenderer();
        CandlestickRenderer r2 = new CandlestickRenderer();
        assertEquals(r1, r2);

        // upPaint
        r1.setUpPaint(new GradientPaint(1.0f, 2.0f, Color.red, 3.0f, 4.0f,
                Color.white));
        assertFalse(r1.equals(r2));
        r2.setUpPaint(new GradientPaint(1.0f, 2.0f, Color.red, 3.0f, 4.0f,
                Color.white));
        assertTrue(r1.equals(r2));

        // downPaint
        r1.setDownPaint(new GradientPaint(5.0f, 6.0f, Color.green, 7.0f, 8.0f,
                Color.yellow));
        assertFalse(r1.equals(r2));
        r2.setDownPaint(new GradientPaint(5.0f, 6.0f, Color.green, 7.0f, 8.0f,
                Color.yellow));
        assertTrue(r1.equals(r2));

        // drawVolume
        r1.setDrawVolume(false);
        assertFalse(r1.equals(r2));
        r2.setDrawVolume(false);
        assertTrue(r1.equals(r2));

        // candleWidth
        r1.setCandleWidth(3.3);
        assertFalse(r1.equals(r2));
        r2.setCandleWidth(3.3);
        assertTrue(r1.equals(r2));

        // maxCandleWidthInMilliseconds
        r1.setMaxCandleWidthInMilliseconds(123);
        assertFalse(r1.equals(r2));
        r2.setMaxCandleWidthInMilliseconds(123);
        assertTrue(r1.equals(r2));

        // autoWidthMethod
        r1.setAutoWidthMethod(CandlestickRenderer.WIDTHMETHOD_SMALLEST);
        assertFalse(r1.equals(r2));
        r2.setAutoWidthMethod(CandlestickRenderer.WIDTHMETHOD_SMALLEST);
        assertTrue(r1.equals(r2));

        // autoWidthFactor
        r1.setAutoWidthFactor(0.22);
        assertFalse(r1.equals(r2));
        r2.setAutoWidthFactor(0.22);
        assertTrue(r1.equals(r2));

        // autoWidthGap
        r1.setAutoWidthGap(1.1);
        assertFalse(r1.equals(r2));
        r2.setAutoWidthGap(1.1);
        assertTrue(r1.equals(r2));

        r1.setUseOutlinePaint(true);
        assertFalse(r1.equals(r2));
        r2.setUseOutlinePaint(true);
        assertTrue(r1.equals(r2));

        r1.setVolumePaint(Color.blue);
        assertFalse(r1.equals(r2));
        r2.setVolumePaint(Color.blue);
        assertTrue(r1.equals(r2));
    }

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

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

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

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

        CandlestickRenderer r1 = new CandlestickRenderer();
        CandlestickRenderer 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 = (CandlestickRenderer) in.readObject();
            in.close();
        }
        catch (Exception e) {
            e.printStackTrace();
        }
        assertEquals(r1, r2);

    }

    /**
     * Some checks for the findRangeBounds() method.
     */
    public void testFindRangeBounds() {
        CandlestickRenderer renderer = new CandlestickRenderer();

        OHLCDataItem item1 = new OHLCDataItem(new Date(1L), 2.0, 4.0, 1.0, 3.0,
                100);
        OHLCDataset dataset = new DefaultOHLCDataset("S1",
                new OHLCDataItem[] {item1});
        Range range = renderer.findRangeBounds(dataset);
        assertEquals(new Range(1.0, 4.0), range);

        OHLCDataItem item2 = new OHLCDataItem(new Date(1L), -1.0, 3.0, -1.0,
                3.0, 100);
        dataset = new DefaultOHLCDataset("S1", new OHLCDataItem[] {item1,
                item2});
        range = renderer.findRangeBounds(dataset);
        assertEquals(new Range(-1.0, 4.0), range);

        // try an empty dataset - should return a null range
        dataset = new DefaultOHLCDataset("S1", new OHLCDataItem[] {});
        range = renderer.findRangeBounds(dataset);
        assertNull(range);

        // try a null dataset - should return a null range
        range = renderer.findRangeBounds(null);
        assertNull(range);
    }

}

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