praktikum-holons/jars/jfreechart-1.0.19/tests/org/jfree/chart/renderer/xy/XYStepAreaRendererTest.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.]
 *
 * ---------------------------
 * XYStepAreaRendererTest.java
 * ---------------------------
 * (C) Copyright 2003-2013, by Object Refinery Limited and Contributors.
 *
 * Original Author:  David Gilbert (for Object Refinery Limited);
 * Contributor(s):   Matthias Rose;
 *
 * Changes
 * -------
 * 25-Mar-2003 : Version 1 (DG);
 * 26-Sep-2003 : copied XYStepRendererTests.java and used for
 *               testing XYStepAreaRenderer (MR);
 * 14-Feb-2007 : Extended testEquals() (DG);
 * 22-Apr-2008 : Added testPublicCloneable (DG);
 * 05-Dec-2013 : Add stepPoint to equals() test (DG);
 *
 */

package org.jfree.chart.renderer.xy;

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 org.jfree.chart.JFreeChart;
import org.jfree.chart.TestUtilities;
import org.jfree.chart.axis.NumberAxis;
import org.jfree.chart.plot.XYPlot;
import org.jfree.data.xy.DefaultTableXYDataset;
import org.jfree.data.xy.XYSeries;
import org.jfree.util.PublicCloneable;
import org.junit.Test;

/**
 * Tests for the {@link XYStepAreaRenderer} class.
 */
public class XYStepAreaRendererTest {

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

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

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

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

        r1.setPlotArea(false);
        assertFalse(r1.equals(r2));
        r2.setPlotArea(false);
        assertTrue(r1.equals(r2));

        r1.setRangeBase(-1.0);
        assertFalse(r1.equals(r2));
        r2.setRangeBase(-1.0);
        assertTrue(r1.equals(r2));
        
        r1.setStepPoint(0.33);
        assertFalse(r1.equals(r2));
        r2.setStepPoint(0.33);
        assertTrue(r1.equals(r2));

    }

    /**
     * Two objects that are equal are required to return the same hashCode.
     */
    @Test
    public void testHashcode() {
        XYStepAreaRenderer r1 = new XYStepAreaRenderer();
        XYStepAreaRenderer r2 = new XYStepAreaRenderer();
        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 {
        XYStepAreaRenderer r1 = new XYStepAreaRenderer();
        XYStepAreaRenderer r2 = (XYStepAreaRenderer) r1.clone();
        assertTrue(r1 != r2);
        assertTrue(r1.getClass() == r2.getClass());
        assertTrue(r1.equals(r2));
    }

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

    /**
     * Serialize an instance, restore it, and check for equality.
     */
    @Test
    public void testSerialization() {
        XYStepAreaRenderer r1 = new XYStepAreaRenderer();
        XYStepAreaRenderer r2 = (XYStepAreaRenderer) 
                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 {
            DefaultTableXYDataset dataset = new DefaultTableXYDataset();

            XYSeries s1 = new XYSeries("Series 1", true, false);
            s1.add(5.0, 5.0);
            s1.add(10.0, 15.5);
            s1.add(15.0, 9.5);
            s1.add(20.0, 7.5);
            dataset.addSeries(s1);

            XYSeries s2 = new XYSeries("Series 2", true, false);
            s2.add(5.0, 5.0);
            s2.add(10.0, 15.5);
            s2.add(15.0, 9.5);
            s2.add(20.0, 3.5);
            dataset.addSeries(s2);
            XYPlot plot = new XYPlot(dataset,
                    new NumberAxis("X"), new NumberAxis("Y"),
                    new XYStepAreaRenderer());
            JFreeChart chart = new JFreeChart(plot);
            /* BufferedImage image = */ chart.createBufferedImage(300, 200,
                    null);
        }
        catch (NullPointerException e) {
            fail("No exception should be thrown.");
        }
    }

}