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Java > Open Source Codes > org > jfree > chart > axis > junit > NumberTickUnitTests


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  * NumberTickUnitTests.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: NumberTickUnitTests.java,v 1.1.2.1 2006/10/03 15:41:24 mungady Exp $
36  *
37  * Changes
38  * -------
39  * 5-Jul-2005 : Version 1 (DG);
40  *
41  */
42
43 package org.jfree.chart.axis.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 import java.text.DecimalFormat JavaDoc;
52
53 import junit.framework.Test;
54 import junit.framework.TestCase;
55 import junit.framework.TestSuite;
56
57 import org.jfree.chart.axis.NumberTickUnit;
58
59 /**
60  * Some tests for the {@link NumberTickUnit} class.
61  */
62 public class NumberTickUnitTests 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(NumberTickUnitTests.class);
71     }
72
73     /**
74      * Constructs a new set of tests.
75      *
76      * @param name the name of the tests.
77      */
78     public NumberTickUnitTests(String JavaDoc name) {
79         super(name);
80     }
81
82     /**
83      * Confirm that the equals method can distinguish all the required fields.
84      */
85     public void testEquals() {
86         NumberTickUnit t1 = new NumberTickUnit(1.23, new DecimalFormat JavaDoc("0.00"));
87         NumberTickUnit t2 = new NumberTickUnit(1.23, new DecimalFormat JavaDoc("0.00"));
88         assertTrue(t1.equals(t2));
89         assertTrue(t2.equals(t1));
90         
91         t1 = new NumberTickUnit(3.21, new DecimalFormat JavaDoc("0.00"));
92         assertFalse(t1.equals(t2));
93         t2 = new NumberTickUnit(3.21, new DecimalFormat JavaDoc("0.00"));
94         assertTrue(t1.equals(t2));
95         
96         t1 = new NumberTickUnit(3.21, new DecimalFormat JavaDoc("0.000"));
97         assertFalse(t1.equals(t2));
98         t2 = new NumberTickUnit(3.21, new DecimalFormat JavaDoc("0.000"));
99         assertTrue(t1.equals(t2));
100     }
101
102     /**
103      * Two objects that are equal are required to return the same hashCode.
104      */
105     public void testHashCode() {
106         NumberTickUnit t1 = new NumberTickUnit(1.23, new DecimalFormat JavaDoc("0.00"));
107         NumberTickUnit t2 = new NumberTickUnit(1.23, new DecimalFormat JavaDoc("0.00"));
108         int h1 = t1.hashCode();
109         int h2 = t2.hashCode();
110         assertEquals(h1, h2);
111     }
112
113     /**
114      * This is an immutable class so it doesn't need to be cloneable.
115      */
116     public void testCloning() {
117         NumberTickUnit t1 = new NumberTickUnit(1.23, new DecimalFormat JavaDoc("0.00"));
118         assertFalse(t1 instanceof Cloneable JavaDoc);
119     }
120
121     /**
122      * Serialize an instance, restore it, and check for equality.
123      */
124     public void testSerialization() {
125         NumberTickUnit t1 = new NumberTickUnit(1.23, new DecimalFormat JavaDoc("0.00"));
126         NumberTickUnit t2 = null;
127         try {
128             ByteArrayOutputStream JavaDoc buffer = new ByteArrayOutputStream JavaDoc();
129             ObjectOutput JavaDoc out = new ObjectOutputStream JavaDoc(buffer);
130             out.writeObject(t1);
131             out.close();
132
133             ObjectInput JavaDoc in = new ObjectInputStream JavaDoc(
134                 new ByteArrayInputStream JavaDoc(buffer.toByteArray())
135             );
136             t2 = (NumberTickUnit) in.readObject();
137             in.close();
138         }
139         catch (Exception JavaDoc e) {
140             e.printStackTrace();
141         }
142         assertEquals(t1, t2);
143     }
144
145 }
146
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