1 /***
2 * Redistribution and use in source and binary forms, with or without
3 * modification, are permitted provided that the following conditions are
4 * met :
5 *
6 * . Redistributions of source code must retain the above copyright
7 * notice, this list of conditions and the following disclaimer.
8 *
9 * . Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * . The name of the author may not be used to endorse or promote products
14 * derived from this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
18 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
19 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
20 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
21 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
22 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
24 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
25 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
26 * POSSIBILITY OF SUCH DAMAGE.
27 *
28 * $Id: RandomTest.java,v 1.2 2005/08/26 18:09:36 mat007 Exp $
29 */
30
31 package jtge.util.random;
32
33 import jtge.util.EasyMockTestCase;
34
35 /***
36 * @author Mathieu Champlon
37 * @version $Revision: 1.2 $ $Date: 2005/08/26 18:09:36 $
38 */
39 public class RandomTest extends EasyMockTestCase
40 {
41 /***
42 * Tested object.
43 */
44 private Random random;
45
46 protected void setUp()
47 {
48 random = new Random( 0 );
49 }
50
51 public void testNextInt()
52 {
53 for( int maxVal = 0; maxVal < 1000; ++maxVal )
54 for( int passes = 0; passes < maxVal; ++passes )
55 checkNextIntFor( maxVal );
56 }
57
58 private void checkNextIntFor( int max )
59 {
60 checkRange( random.nextInt( max ), 0, max );
61 }
62
63 private void checkRange( int value, int min, int max )
64 {
65 assertTrue( value >= 0 && value < max );
66 }
67
68 public void testNextFloatForZeroIsZero()
69 {
70 assertEquals( random.nextFloat( 0 ), 0, 0 );
71 }
72
73 public void testNextFloatIsAFloat()
74 {
75 float value = random.nextFloat( 1 );
76 assertTrue( value > 0 && value < 1 );
77 }
78
79 public void testSetSeedForReproductibility()
80 {
81 random.setSeed( 77 );
82 float value = random.nextFloat( 1 );
83 random.setSeed( 77 );
84 assertEquals( random.nextFloat( 1 ), value, 0 );
85 }
86
87 public void testGetSeed()
88 {
89 assertEquals( random.getSeed(),0 );
90 random = new Random();
91 assertTrue( random.getSeed() != 0 );
92 }
93 }