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Java > Open Source Codes > org > jfree > chart > renderer > xy > junit > XYStepAreaRendererTests


1 /* ===========================================================
2  * JFreeChart : a free chart library for the Java(tm) platform
3  * ===========================================================
4  *
5  * (C) Copyright 2000-2005, by Object Refinery Limited and Contributors.
6  *
7  * Project Info: http://www.jfree.org/jfreechart/index.html
8  *
9  * This library is free software; you can redistribute it and/or modify it
10  * under the terms of the GNU Lesser General Public License as published by
11  * the Free Software Foundation; either version 2.1 of the License, or
12  * (at your option) any later version.
13  *
14  * This library is distributed in the hope that it will be useful, but
15  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
16  * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
17  * License for more details.
18  *
19  * You should have received a copy of the GNU Lesser General Public
20  * License along with this library; if not, write to the Free Software
21  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
22  * USA.
23  *
24  * [Java is a trademark or registered trademark of Sun Microsystems, Inc.
25  * in the United States and other countries.]
26  *
27  * ----------------------------
28  * XYStepAreaRendererTests.java
29  * ----------------------------
30  * (C) Copyright 2003-2005, by Object Refinery Limited and Contributors.
31  *
32  * Original Author: David Gilbert (for Object Refinery Limited);
33  * Contributor(s): Matthias Rose;
34  *
35  * $Id: XYStepAreaRendererTests.java,v 1.1.2.1 2006/10/03 15:41:45 mungady Exp $
36  *
37  * Changes
38  * -------
39  * 25-Mar-2003 : Version 1 (DG);
40  * 26-Sep-2003 : copied XYStepRendererTests.java and used for
41  * testing XYStepAreaRenderer (MR);
42  */
43
44 package org.jfree.chart.renderer.xy.junit;
45
46 import java.io.ByteArrayInputStream JavaDoc;
47 import java.io.ByteArrayOutputStream JavaDoc;
48 import java.io.ObjectInput JavaDoc;
49 import java.io.ObjectInputStream JavaDoc;
50 import java.io.ObjectOutput JavaDoc;
51 import java.io.ObjectOutputStream JavaDoc;
52
53 import junit.framework.Test;
54 import junit.framework.TestCase;
55 import junit.framework.TestSuite;
56
57 import org.jfree.chart.JFreeChart;
58 import org.jfree.chart.axis.NumberAxis;
59 import org.jfree.chart.plot.XYPlot;
60 import org.jfree.chart.renderer.xy.XYStepAreaRenderer;
61 import org.jfree.data.xy.DefaultTableXYDataset;
62 import org.jfree.data.xy.XYSeries;
63
64 /**
65  * Tests for the {@link XYStepAreaRenderer} class.
66  */
67 public class XYStepAreaRendererTests extends TestCase {
68
69     /**
70      * Returns the tests as a test suite.
71      *
72      * @return The test suite.
73      */
74     public static Test suite() {
75         return new TestSuite(XYStepAreaRendererTests.class);
76     }
77
78     /**
79      * Constructs a new set of tests.
80      *
81      * @param name the name of the tests.
82      */
83     public XYStepAreaRendererTests(String JavaDoc name) {
84         super(name);
85     }
86
87     /**
88      * Check that the equals() method distinguishes all fields.
89      */
90     public void testEquals() {
91         XYStepAreaRenderer r1 = new XYStepAreaRenderer();
92         XYStepAreaRenderer r2 = new XYStepAreaRenderer();
93         assertEquals(r1, r2);
94     }
95
96     /**
97      * Two objects that are equal are required to return the same hashCode.
98      */
99     public void testHashcode() {
100         XYStepAreaRenderer r1 = new XYStepAreaRenderer();
101         XYStepAreaRenderer r2 = new XYStepAreaRenderer();
102         assertTrue(r1.equals(r2));
103         int h1 = r1.hashCode();
104         int h2 = r2.hashCode();
105         assertEquals(h1, h2);
106     }
107     
108     /**
109      * Confirm that cloning works.
110      */
111     public void testCloning() {
112         XYStepAreaRenderer r1 = new XYStepAreaRenderer();
113         XYStepAreaRenderer r2 = null;
114         try {
115             r2 = (XYStepAreaRenderer) r1.clone();
116         }
117         catch (CloneNotSupportedException JavaDoc e) {
118             System.err.println("Failed to clone.");
119         }
120         assertTrue(r1 != r2);
121         assertTrue(r1.getClass() == r2.getClass());
122         assertTrue(r1.equals(r2));
123     }
124
125     /**
126      * Serialize an instance, restore it, and check for equality.
127      */
128     public void testSerialization() {
129
130         XYStepAreaRenderer r1 = new XYStepAreaRenderer();
131         XYStepAreaRenderer r2 = null;
132
133         try {
134             ByteArrayOutputStream JavaDoc buffer = new ByteArrayOutputStream JavaDoc();
135             ObjectOutput JavaDoc out = new ObjectOutputStream JavaDoc(buffer);
136             out.writeObject(r1);
137             out.close();
138
139             ObjectInput JavaDoc in = new ObjectInputStream JavaDoc(
140                 new ByteArrayInputStream JavaDoc(buffer.toByteArray())
141             );
142             r2 = (XYStepAreaRenderer) in.readObject();
143             in.close();
144         }
145         catch (Exception JavaDoc e) {
146             System.out.println(e.toString());
147         }
148         assertEquals(r1, r2);
149     }
150
151     /**
152      * Draws the chart with a <code>null</code> info object to make sure that
153      * no exceptions are thrown (particularly by code in the renderer).
154      */
155     public void testDrawWithNullInfo() {
156         boolean success = false;
157         try {
158             DefaultTableXYDataset dataset = new DefaultTableXYDataset();
159         
160             XYSeries s1 = new XYSeries("Series 1", true, false);
161             s1.add(5.0, 5.0);
162             s1.add(10.0, 15.5);
163             s1.add(15.0, 9.5);
164             s1.add(20.0, 7.5);
165             dataset.addSeries(s1);
166         
167             XYSeries s2 = new XYSeries("Series 2", true, false);
168             s2.add(5.0, 5.0);
169             s2.add(10.0, 15.5);
170             s2.add(15.0, 9.5);
171             s2.add(20.0, 3.5);
172             dataset.addSeries(s2);
173             XYPlot plot = new XYPlot(dataset,
174                     new NumberAxis("X"), new NumberAxis("Y"),
175                     new XYStepAreaRenderer());
176             JFreeChart chart = new JFreeChart(plot);
177             /* BufferedImage image = */ chart.createBufferedImage(300, 200,
178                     null);
179             success = true;
180         }
181         catch (NullPointerException JavaDoc e) {
182             e.printStackTrace();
183             success = false;
184         }
185         assertTrue(success);
186     }
187
188 }
189
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