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


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  * MeanAndStandardDeviationTests.java
29  * ----------------------------------
30  * (C) Copyright 2005, by Object Refinery Limited and Contributors.
31  *
32  * Original Author: David Gilbert (for Object Refinery Limited);
33  * Contributor(s): -;
34  *
35  * $Id: MeanAndStandardDeviationTests.java,v 1.1.2.1 2006/10/03 15:41:42 mungady Exp $
36  *
37  * Changes
38  * -------
39  * 05-Feb-2005 : 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.MeanAndStandardDeviation;
57
58 /**
59  * Tests for the {@link MeanAndStandardDeviation} class.
60  */
61 public class MeanAndStandardDeviationTests 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(MeanAndStandardDeviationTests.class);
70     }
71
72     /**
73      * Constructs a new set of tests.
74      *
75      * @param name the name of the tests.
76      */
77     public MeanAndStandardDeviationTests(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         MeanAndStandardDeviation m1 = new MeanAndStandardDeviation(1.2, 3.4);
86         MeanAndStandardDeviation m2 = new MeanAndStandardDeviation(1.2, 3.4);
87         assertTrue(m1.equals(m2));
88         assertTrue(m2.equals(m1));
89
90         m1 = new MeanAndStandardDeviation(1.0, 3.4);
91         assertFalse(m1.equals(m2));
92         m2 = new MeanAndStandardDeviation(1.0, 3.4);
93         assertTrue(m1.equals(m2));
94
95         m1 = new MeanAndStandardDeviation(1.0, 3.0);
96         assertFalse(m1.equals(m2));
97         m2 = new MeanAndStandardDeviation(1.0, 3.0);
98         assertTrue(m1.equals(m2));
99     }
100
101     /**
102      * Immutable class - should not be cloneable.
103      */
104     public void testCloning() {
105         MeanAndStandardDeviation m1 = new MeanAndStandardDeviation(1.2, 3.4);
106         assertFalse(m1 instanceof Cloneable JavaDoc);
107     }
108
109     /**
110      * Serialize an instance, restore it, and check for equality.
111      */
112     public void testSerialization() {
113         MeanAndStandardDeviation m1 = new MeanAndStandardDeviation(1.2, 3.4);
114         MeanAndStandardDeviation m2 = null;
115
116         try {
117             ByteArrayOutputStream JavaDoc buffer = new ByteArrayOutputStream JavaDoc();
118             ObjectOutput JavaDoc out = new ObjectOutputStream JavaDoc(buffer);
119             out.writeObject(m1);
120             out.close();
121
122             ObjectInput JavaDoc in = new ObjectInputStream JavaDoc(
123                 new ByteArrayInputStream JavaDoc(buffer.toByteArray())
124             );
125             m2 = (MeanAndStandardDeviation) in.readObject();
126             in.close();
127         }
128         catch (Exception JavaDoc e) {
129             System.out.println(e.toString());
130         }
131         assertEquals(m1, m2);
132
133     }
134 }
135
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