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Java > Open Source Codes > org > jfree > data > statistics > junit > HistogramBinTests


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  * HistogramBinTests.java
29  * ----------------------
30  * (C) Copyright 2004, 2005, by Object Refinery Limited.
31  *
32  * Original Author: David Gilbert (for Object Refinery Limited);
33  * Contributor(s): -;
34  *
35  * $Id: HistogramBinTests.java,v 1.1.2.1 2006/10/03 15:41:41 mungady Exp $
36  *
37  * Changes
38  * -------
39  * 01-Mar-2004 : Version 1 (DG);
40  *
41  */
42
43 package org.jfree.data.statistics.junit;
44
45 import java.io.ByteArrayInputStream JavaDoc;
46 import java.io.ByteArrayOutputStream JavaDoc;
47 import java.io.ObjectInput JavaDoc;
48 import java.io.ObjectInputStream JavaDoc;
49 import java.io.ObjectOutput JavaDoc;
50 import java.io.ObjectOutputStream JavaDoc;
51
52 import junit.framework.Test;
53 import junit.framework.TestCase;
54 import junit.framework.TestSuite;
55
56 import org.jfree.data.statistics.HistogramBin;
57
58 /**
59  * Tests for the {@link HistogramBin} class.
60  */
61 public class HistogramBinTests extends TestCase {
62
63     /**
64      * Returns the tests as a test suite.
65      *
66      * @return The test suite.
67      */
68     public static Test suite() {
69         return new TestSuite(HistogramBinTests.class);
70     }
71
72     /**
73      * Constructs a new set of tests.
74      *
75      * @param name the name of the tests.
76      */
77     public HistogramBinTests(String JavaDoc name) {
78         super(name);
79     }
80
81     /**
82      * Confirm that the equals method can distinguish all the required fields.
83      */
84     public void testEquals() {
85         
86         double start = 10.0;
87         double end = 20.0;
88         HistogramBin b1 = new HistogramBin(start, end);
89         HistogramBin b2 = new HistogramBin(start, end);
90         
91         assertTrue(b1.equals(b2));
92         assertTrue(b2.equals(b1));
93
94     }
95
96     /**
97      * Confirm that cloning works.
98      */
99     public void testCloning() {
100         double start = 10.0;
101         double end = 20.0;
102         HistogramBin b1 = new HistogramBin(start, end);
103         HistogramBin b2 = null;
104         try {
105             b2 = (HistogramBin) b1.clone();
106         }
107         catch (CloneNotSupportedException JavaDoc e) {
108             System.err.println("Failed to clone.");
109         }
110         assertTrue(b1 != b2);
111         assertTrue(b1.getClass() == b2.getClass());
112         assertTrue(b1.equals(b2));
113     }
114
115     /**
116      * Serialize an instance, restore it, and check for equality.
117      */
118     public void testSerialization() {
119
120         double start = 10.0;
121         double end = 20.0;
122         HistogramBin b1 = new HistogramBin(start, end);
123         HistogramBin b2 = null;
124
125         try {
126             ByteArrayOutputStream JavaDoc buffer = new ByteArrayOutputStream JavaDoc();
127             ObjectOutput JavaDoc out = new ObjectOutputStream JavaDoc(buffer);
128             out.writeObject(b1);
129             out.close();
130
131             ObjectInput JavaDoc in = new ObjectInputStream JavaDoc(
132                 new ByteArrayInputStream JavaDoc(buffer.toByteArray())
133             );
134             b2 = (HistogramBin) in.readObject();
135             in.close();
136         }
137         catch (Exception JavaDoc e) {
138             System.out.println(e.toString());
139         }
140         assertEquals(b1, b2);
141
142     }
143
144 }
145
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