gt:         assertEquals(0.5, r.getLowerBound(), EPSILON);
context: /* ===========================================================
   * 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.]
   *
   * ------------------------
   * XYBlockRendererTest.java
   * ------------------------
   * (C) Copyright 2006-2013, 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);
   * 20-Oct-2011 : Added testFindDomainBounds() and testFindRangeBounds() (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.assertNull;
  
  import java.awt.Color;
  
  import org.jfree.chart.TestUtilities;
  
  import org.jfree.chart.renderer.GrayPaintScale;
  import org.jfree.chart.renderer.LookupPaintScale;
  import org.jfree.data.Range;
  import org.jfree.data.xy.DefaultXYZDataset;
  import org.jfree.data.xy.XYSeriesCollection;
  import org.jfree.data.xy.XYSeries;
  import org.jfree.util.PublicCloneable;
  import org.junit.Test;
  
  /**
   * Tests for the {@link XYBlockRenderer} class.
   */
  public class XYBlockRendererTest {
  
      private static final double EPSILON = 0.0000000001;
  
      /**
       * Test that the equals() method distinguishes all fields.
       */
      @Test
      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.
       */
      @Test
      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.
       */
      @Test
      public void testCloning() throws CloneNotSupportedException {
          XYBlockRenderer r1 = new XYBlockRenderer();
          LookupPaintScale scale1 = new LookupPaintScale();
          r1.setPaintScale(scale1);
          XYBlockRenderer r2 = (XYBlockRenderer) r1.clone();
          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}.
       */
      @Test
      public void testPublicCloneable() {
          XYBlockRenderer r1 = new XYBlockRenderer();
          assertTrue(r1 instanceof PublicCloneable);
      }
  
      /**
       * Serialize an instance, restore it, and check for equality.
       */
      @Test
      public void testSerialization() {
          XYBlockRenderer r1 = new XYBlockRenderer();
          XYBlockRenderer r2 = (XYBlockRenderer) TestUtilities.serialised(r1);
          assertEquals(r1, r2);
      }
  
      /**
       * A simple test for bug 1766646.
       */
      @Test
      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.
       */
      @Test
      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);
      }
  
      /**
       * Some tests for the findRangeBounds() method.
       */
      @Test
      public void testFindRangeBounds() {
          XYBlockRenderer renderer = new XYBlockRenderer();
          assertNull(renderer.findRangeBounds(null));
  
          XYSeriesCollection dataset = new XYSeriesCollection();
          XYSeries series = new XYSeries("S1");
          series.add(1.0, null);
          dataset.addSeries(series);
          Range r = renderer.findRangeBounds(dataset);
          assertNull(r);
      }
      
      /**
       * Some tests for the findDomainBounds() method.
       */
      @Test
      public void testFindDomainBounds() {
          XYBlockRenderer renderer = new XYBlockRenderer();
          assertNull(renderer.findRangeBounds(null));
  
          XYSeriesCollection dataset = new XYSeriesCollection();
          XYSeries series = new XYSeries("S1");
          series.add(1.0, null);
          dataset.addSeries(series);
          Range r = renderer.findDomainBounds(dataset);
  