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jfreechart example source code file (ValueMarkerTests.java)

This example jfreechart source code file (ValueMarkerTests.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, epsilon, epsilon, exception, font, io, label, objectinput, sansserif, stroke, valuemarker, valuemarker, valuemarkertests, valuemarkertests

The jfreechart ValueMarkerTests.java source code

/* ===========================================================
 * 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.]
 *
 * ---------------------
 * ValueMarkerTests.java
 * ---------------------
 * (C) Copyright 2003-2007, by Object Refinery Limited and Contributors.
 *
 * Original Author:  David Gilbert (for Object Refinery Limited);
 * Contributor(s):   -;
 *
 * Changes
 * -------
 * 18-Aug-2003 : Version 1 (DG);
 * 14-Jun-2004 : Renamed MarkerTests --> ValueMarkerTests (DG);
 * 01-Jun-2005 : Strengthened equals() test (DG);
 * 05-Sep-2006 : Added checks for MarkerChangeEvent generation (DG);
 * 26-Sep-2007 : Added test1802195() method (DG);
 * 08-Oct-2007 : Added test1808376() method (DG);
 *
 */

package org.jfree.chart.plot.junit;

import java.awt.BasicStroke;
import java.awt.Color;
import java.awt.Font;
import java.awt.GradientPaint;
import java.awt.Stroke;
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.event.MarkerChangeEvent;
import org.jfree.chart.event.MarkerChangeListener;
import org.jfree.chart.plot.Marker;
import org.jfree.chart.plot.ValueMarker;
import org.jfree.ui.LengthAdjustmentType;
import org.jfree.ui.RectangleAnchor;
import org.jfree.ui.RectangleInsets;
import org.jfree.ui.TextAnchor;

/**
 * Tests for the {@link ValueMarker} class.
 */
public class ValueMarkerTests
    extends TestCase
    implements MarkerChangeListener {


    MarkerChangeEvent lastEvent;

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

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

    /**
     * Confirm that the equals method can distinguish all the required fields.
     */
    public void testEquals() {

        Marker m1 = new ValueMarker(45.0);
        Marker m2 = new ValueMarker(45.0);
        assertTrue(m1.equals(m2));
        assertTrue(m2.equals(m1));

        m1.setPaint(new GradientPaint(1.0f, 2.0f, Color.green,
                3.0f, 4.0f, Color.red));
        assertFalse(m1.equals(m2));
        m2.setPaint(new GradientPaint(1.0f, 2.0f, Color.green,
                3.0f, 4.0f, Color.red));
        assertTrue(m1.equals(m2));

        BasicStroke stroke = new BasicStroke(2.2f);
        m1.setStroke(stroke);
        assertFalse(m1.equals(m2));
        m2.setStroke(stroke);
        assertTrue(m1.equals(m2));

        m1.setOutlinePaint(new GradientPaint(4.0f, 3.0f, Color.yellow,
                2.0f, 1.0f, Color.white));
        assertFalse(m1.equals(m2));
        m2.setOutlinePaint(new GradientPaint(4.0f, 3.0f, Color.yellow,
                2.0f, 1.0f, Color.white));
        assertTrue(m1.equals(m2));

        m1.setOutlineStroke(stroke);
        assertFalse(m1.equals(m2));
        m2.setOutlineStroke(stroke);
        assertTrue(m1.equals(m2));

        m1.setAlpha(0.1f);
        assertFalse(m1.equals(m2));
        m2.setAlpha(0.1f);
        assertTrue(m1.equals(m2));

        m1.setLabel("New Label");
        assertFalse(m1.equals(m2));
        m2.setLabel("New Label");
        assertTrue(m1.equals(m2));

        m1.setLabelFont(new Font("SansSerif", Font.PLAIN, 10));
        assertFalse(m1.equals(m2));
        m2.setLabelFont(new Font("SansSerif", Font.PLAIN, 10));
        assertTrue(m1.equals(m2));

        m1.setLabelPaint(new GradientPaint(1.0f, 2.0f, Color.blue,
                3.0f, 4.0f, Color.yellow));
        assertFalse(m1.equals(m2));
        m2.setLabelPaint(new GradientPaint(1.0f, 2.0f, Color.blue,
                3.0f, 4.0f, Color.yellow));
        assertTrue(m1.equals(m2));

        m1.setLabelAnchor(RectangleAnchor.TOP_RIGHT);
        assertFalse(m1.equals(m2));
        m2.setLabelAnchor(RectangleAnchor.TOP_RIGHT);
        assertTrue(m1.equals(m2));

        m1.setLabelTextAnchor(TextAnchor.BASELINE_RIGHT);
        assertFalse(m1.equals(m2));
        m2.setLabelTextAnchor(TextAnchor.BASELINE_RIGHT);
        assertTrue(m1.equals(m2));

        m1.setLabelOffset(new RectangleInsets(10.0, 10.0, 10.0, 10.0));
        assertFalse(m1.equals(m2));
        m2.setLabelOffset(new RectangleInsets(10.0, 10.0, 10.0, 10.0));
        assertTrue(m1.equals(m2));

        m1.setLabelOffsetType(LengthAdjustmentType.EXPAND);
        assertFalse(m1.equals(m2));
        m2.setLabelOffsetType(LengthAdjustmentType.EXPAND);
        assertTrue(m1.equals(m2));

        m1 = new ValueMarker(12.3);
        m2 = new ValueMarker(45.6);
        assertFalse(m1.equals(m2));
        m2 = new ValueMarker(12.3);
        assertTrue(m1.equals(m2));

    }

    /**
     * Confirm that cloning works.
     */
    public void testCloning() {
        ValueMarker m1 = new ValueMarker(25.0);
        ValueMarker m2 = null;
        try {
            m2 = (ValueMarker) m1.clone();
        }
        catch (CloneNotSupportedException e) {
            e.printStackTrace();
        }
        assertTrue(m1 != m2);
        assertTrue(m1.getClass() == m2.getClass());
        assertTrue(m1.equals(m2));
    }

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

        ValueMarker m1 = new ValueMarker(25.0);
        ValueMarker m2 = null;

        try {
            ByteArrayOutputStream buffer = new ByteArrayOutputStream();
            ObjectOutput out = new ObjectOutputStream(buffer);
            out.writeObject(m1);
            out.close();

            ObjectInput in = new ObjectInputStream(
                    new ByteArrayInputStream(buffer.toByteArray()));
            m2 = (ValueMarker) in.readObject();
            in.close();
        }
        catch (Exception e) {
            e.printStackTrace();
        }
        boolean b = m1.equals(m2);
        assertTrue(b);

    }

    private static final double EPSILON = 0.000000001;

    /**
     * Some checks for the getValue() and setValue() methods.
     */
    public void testGetSetValue() {
        ValueMarker m = new ValueMarker(1.1);
        m.addChangeListener(this);
        this.lastEvent = null;
        assertEquals(1.1, m.getValue(), EPSILON);
        m.setValue(33.3);
        assertEquals(33.3, m.getValue(), EPSILON);
        assertEquals(m, this.lastEvent.getMarker());
    }

    /**
     * Records the last event.
     *
     * @param event  the last event.
     */
    public void markerChanged(MarkerChangeEvent event) {
        this.lastEvent = event;
    }

    /**
     * A test for bug 1802195.
     */
    public void test1802195() {

        ValueMarker m1 = new ValueMarker(25.0);
        ValueMarker m2 = null;

        try {
            ByteArrayOutputStream buffer = new ByteArrayOutputStream();
            ObjectOutput out = new ObjectOutputStream(buffer);
            out.writeObject(m1);
            out.close();

            ObjectInput in = new ObjectInputStream(
                    new ByteArrayInputStream(buffer.toByteArray()));
            m2 = (ValueMarker) in.readObject();
            in.close();
        }
        catch (Exception e) {
            e.printStackTrace();
        }
        boolean b = m1.equals(m2);
        assertTrue(b);

        boolean pass = true;
        try {
            m2.setValue(-10.0);
        }
        catch (NullPointerException e) {
            pass = false;
        }
        assertTrue(pass);

    }

    /**
     * A test for bug report 1808376.
     */
    public void test1808376() {
        Stroke stroke = new BasicStroke(1.0f);
        Stroke outlineStroke = new BasicStroke(2.0f);
        ValueMarker m = new ValueMarker(1.0, Color.red, stroke, Color.blue,
                outlineStroke, 0.5f);
        assertEquals(1.0, m.getValue(), EPSILON);
        assertEquals(Color.red, m.getPaint());
        assertEquals(stroke, m.getStroke());
        assertEquals(Color.blue, m.getOutlinePaint());
        assertEquals(outlineStroke, m.getOutlineStroke());
        assertEquals(0.5f, m.getAlpha(), EPSILON);
    }

}

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