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Java > Open Source Codes > org > jfree > chart > renderer > category > junit > DefaultCategoryItemRendererTests


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  * DefaultCategoryItemRendererTests.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): -;
34  *
35  * $Id: DefaultCategoryItemRendererTests.java,v 1.1.2.1 2006/10/03 15:41:33 mungady Exp $
36  *
37  * Changes
38  * -------
39  * 29-Apr-2003 : Version 1 (DG);
40  * 22-Oct-2003 : Added hashCode test (DG);
41  *
42  */
43
44 package org.jfree.chart.renderer.category.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.renderer.category.DefaultCategoryItemRenderer;
58
59 /**
60  * Tests for the {@link DefaultCategoryItemRenderer} class.
61  */
62 public class DefaultCategoryItemRendererTests extends TestCase {
63
64     /**
65      * Returns the tests as a test suite.
66      *
67      * @return The test suite.
68      */
69     public static Test suite() {
70         return new TestSuite(DefaultCategoryItemRendererTests.class);
71     }
72
73     /**
74      * Constructs a new set of tests.
75      *
76      * @param name the name of the tests.
77      */
78     public DefaultCategoryItemRendererTests(String JavaDoc name) {
79         super(name);
80     }
81
82     /**
83      * Check that the equals() method distinguishes all fields.
84      */
85     public void testEquals() {
86         DefaultCategoryItemRenderer r1 = new DefaultCategoryItemRenderer();
87         DefaultCategoryItemRenderer r2 = new DefaultCategoryItemRenderer();
88         assertEquals(r1, r2);
89     }
90
91     /**
92      * Two objects that are equal are required to return the same hashCode.
93      */
94     public void testHashcode() {
95         DefaultCategoryItemRenderer r1 = new DefaultCategoryItemRenderer();
96         DefaultCategoryItemRenderer r2 = new DefaultCategoryItemRenderer();
97         assertTrue(r1.equals(r2));
98         int h1 = r1.hashCode();
99         int h2 = r2.hashCode();
100         assertEquals(h1, h2);
101     }
102     
103     /**
104      * Confirm that cloning works.
105      */
106     public void testCloning() {
107         DefaultCategoryItemRenderer r1 = new DefaultCategoryItemRenderer();
108         DefaultCategoryItemRenderer r2 = null;
109         try {
110             r2 = (DefaultCategoryItemRenderer) r1.clone();
111         }
112         catch (CloneNotSupportedException JavaDoc e) {
113             System.err.println("Failed to clone.");
114         }
115         assertTrue(r1 != r2);
116         assertTrue(r1.getClass() == r2.getClass());
117         assertTrue(r1.equals(r2));
118     }
119   
120     /**
121      * Serialize an instance, restore it, and check for equality.
122      */
123     public void testSerialization() {
124
125         DefaultCategoryItemRenderer r1 = new DefaultCategoryItemRenderer();
126         DefaultCategoryItemRenderer r2 = null;
127
128         try {
129             ByteArrayOutputStream JavaDoc buffer = new ByteArrayOutputStream JavaDoc();
130             ObjectOutput JavaDoc out = new ObjectOutputStream JavaDoc(buffer);
131             out.writeObject(r1);
132             out.close();
133
134             ObjectInput JavaDoc in = new ObjectInputStream JavaDoc(
135                 new ByteArrayInputStream JavaDoc(buffer.toByteArray())
136             );
137             r2 = (DefaultCategoryItemRenderer) in.readObject();
138             in.close();
139         }
140         catch (Exception JavaDoc e) {
141             System.out.println(e.toString());
142         }
143         assertEquals(r1, r2);
144
145     }
146
147 }
148
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