1 //----------------------------------------------------------------------
2 //
3 // PerfectJPattern: "Design patterns are good but components are better!"
4 // TestNullEventData.java Copyright (c) 2009 Giovanni Azua Garcia
5 // bravegag@hotmail.com
6 //
7 // This program is free software; you can redistribute it and/or
8 // modify it under the terms of the GNU General Public License
9 // as published by the Free Software Foundation; either version 3
10 // of the License, or (at your option) any later version.
11 //
12 // This program is distributed in the hope that it will be useful,
13 // but WITHOUT ANY WARRANTY; without even the implied warranty of
14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 // GNU General Public License for more details.
16 //
17 // You should have received a copy of the GNU General Public License
18 // along with this program; if not, see <http://www.gnu.org/licenses/>.
19 //
20 //----------------------------------------------------------------------
21 package org.perfectjpattern.core.behavioral.observer.data;
22
23 import junit.framework.*;
24
25 import org.perfectjpattern.core.api.behavioral.observer.data.*;
26
27
28 /**
29 * Test Suite for {@link NullEventData} implementation.
30 *
31 * @see NullEventData
32 *
33 * @author <a href="mailto:bravegag@hotmail.com">Giovanni Azua</a>
34 * @version $Revision: 1.0 $ $Date: Jun 23, 2007 12:57:09 AM $
35 */
36 public final
37 class TestNullEventData
38 extends TestCase
39 {
40 //------------------------------------------------------------------------
41 // public
42 //------------------------------------------------------------------------
43 /**
44 * Test that the singleton was properly implemented i.e. there is a
45 * single instance retrieved each time.
46 */
47 public void
48 testSingleton()
49 {
50 assertSame("NullEventData singleton implemented incorrectly.",
51 NullEventData.getInstance(), NullEventData.getInstance());
52 }
53 }