MinMaxCategoryRendererTest.java

/* ===========================================================
 * JFreeChart : a free chart library for the Java(tm) platform
 * ===========================================================
 *
 * (C) Copyright 2000-2013, 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.
 *
 * [Oracle and Java are registered trademarks of Oracle and/or its affiliates. 
 * Other names may be trademarks of their respective owners.]
 *
 * -------------------------------
 * MinMaxCategoryRendererTest.java
 * -------------------------------
 * (C) Copyright 2003-2013, by Object Refinery Limited and Contributors.
 *
 * Original Author:  David Gilbert (for Object Refinery Limited);
 * Contributor(s):   -;
 *
 * Changes
 * -------
 * 22-Oct-2003 : Version 1 (DG);
 * 28-Sep-2007 : Added testEquals() method (DG);
 * 23-Apr-2008 : Added testPublicCloneable() (DG);
 *
 */

package org.jfree.chart.renderer.category;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.fail;

import java.awt.BasicStroke;
import java.awt.Color;
import java.awt.GradientPaint;

import org.jfree.chart.JFreeChart;
import org.jfree.chart.TestUtilities;
import org.jfree.chart.axis.CategoryAxis;
import org.jfree.chart.axis.NumberAxis;
import org.jfree.chart.plot.CategoryPlot;
import org.jfree.data.category.DefaultCategoryDataset;
import org.jfree.util.PublicCloneable;
import org.junit.Test;

/**
 * Tests for the {@link MinMaxCategoryRenderer} class.
 */
public class MinMaxCategoryRendererTest {

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

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

        r1.setGroupPaint(new GradientPaint(1.0f, 2.0f, Color.red, 3.0f, 4.0f,
                Color.yellow));
        assertFalse(r1.equals(r2));
        r2.setGroupPaint(new GradientPaint(1.0f, 2.0f, Color.red, 3.0f, 4.0f,
                Color.yellow));
        assertTrue(r1.equals(r2));

        r1.setGroupStroke(new BasicStroke(1.2f));
        assertFalse(r1.equals(r2));
        r2.setGroupStroke(new BasicStroke(1.2f));
        assertTrue(r1.equals(r2));
    }

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

    /**
     * Confirm that cloning works.
     */
    @Test
    public void testCloning() throws CloneNotSupportedException {
        MinMaxCategoryRenderer r1 = new MinMaxCategoryRenderer();
        MinMaxCategoryRenderer r2 = (MinMaxCategoryRenderer) r1.clone();
        assertTrue(r1 != r2);
        assertTrue(r1.getClass() == r2.getClass());
        assertTrue(r1.equals(r2));
    }

    /**
     * Check that this class implements PublicCloneable.
     */
    @Test
    public void testPublicCloneable() {
        MinMaxCategoryRenderer r1 = new MinMaxCategoryRenderer();
        assertTrue(r1 instanceof PublicCloneable);
    }

    /**
     * Serialize an instance, restore it, and check for equality.
     */
    @Test
    public void testSerialization() {
        MinMaxCategoryRenderer r1 = new MinMaxCategoryRenderer();
        MinMaxCategoryRenderer r2 = (MinMaxCategoryRenderer) 
                TestUtilities.serialised(r1);
        assertEquals(r1, r2);
    }

    /**
     * Draws the chart with a <code>null</code> info object to make sure that
     * no exceptions are thrown (particularly by code in the renderer).
     */
    @Test
    public void testDrawWithNullInfo() {
        try {
            DefaultCategoryDataset dataset = new DefaultCategoryDataset();
            dataset.addValue(1.0, "S1", "C1");
            CategoryPlot plot = new CategoryPlot(dataset,
                    new CategoryAxis("Category"), new NumberAxis("Value"),
                    new MinMaxCategoryRenderer());
            JFreeChart chart = new JFreeChart(plot);
            /* BufferedImage image = */ chart.createBufferedImage(300, 200,
                    null);
        }
        catch (NullPointerException e) {
            fail();
        }
    }

}