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


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 License
20  * along with this library; if not, write to the Free Software Foundation,
21  * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
22  *
23  * [Java is a trademark or registered trademark of Sun Microsystems, Inc.
24  * in the United States and other countries.]
25  *
26  * ----------------------
27  * DateTickUnitTests.java
28  * ----------------------
29  * (C) Copyright 2003-2005, by Object Refinery Limited and Contributors.
30  *
31  * Original Author: David Gilbert (for Object Refinery Limited);
32  * Contributor(s): -;
33  *
34  * $Id: DateTickUnitTests.java,v 1.3 2005/03/16 12:10:45 mungady Exp $
35  *
36  * Changes
37  * -------
38  * 26-Mar-2003 : Version 1 (DG);
39  * 07-Jan-2005 : Added test for hashCode() (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
52 import junit.framework.Test;
53 import junit.framework.TestCase;
54 import junit.framework.TestSuite;
55
56 import org.jfree.chart.axis.DateTickUnit;
57
58 /**
59  * Tests for the {@link DateTickUnit} class.
60  */
61 public class DateTickUnitTests 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(DateTickUnitTests.class);
70     }
71
72     /**
73      * Constructs a new set of tests.
74      *
75      * @param name the name of the tests.
76      */
77     public DateTickUnitTests(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         DateTickUnit t1 = new DateTickUnit(DateTickUnit.DAY, 1);
86         DateTickUnit t2 = new DateTickUnit(DateTickUnit.DAY, 1);
87         assertTrue(t1.equals(t2));
88     }
89         
90     /**
91      * Two objects that are equal are required to return the same hashCode.
92      */
93     public void testHashCode() {
94         DateTickUnit t1 = new DateTickUnit(DateTickUnit.DAY, 1);
95         DateTickUnit t2 = new DateTickUnit(DateTickUnit.DAY, 1);
96         assertTrue(t1.equals(t2));
97         int h1 = t1.hashCode();
98         int h2 = t2.hashCode();
99         assertEquals(h1, h2);
100     }
101
102     /**
103      * Serialize an instance, restore it, and check for equality.
104      */
105     public void testSerialization() {
106
107         DateTickUnit a1 = new DateTickUnit(DateTickUnit.DAY, 7);
108         DateTickUnit a2 = null;
109
110         try {
111             ByteArrayOutputStream JavaDoc buffer = new ByteArrayOutputStream JavaDoc();
112             ObjectOutput JavaDoc out = new ObjectOutputStream JavaDoc(buffer);
113             out.writeObject(a1);
114             out.close();
115
116             ObjectInput JavaDoc in = new ObjectInputStream JavaDoc(
117                 new ByteArrayInputStream JavaDoc(buffer.toByteArray())
118             );
119             a2 = (DateTickUnit) in.readObject();
120             in.close();
121         }
122         catch (Exception JavaDoc e) {
123             System.out.println(e.toString());
124         }
125         assertEquals(a1, a2);
126
127     }
128
129 }
130
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