KickJava   Java API By Example, From Geeks To Geeks.

Java > Open Source Codes > JSci > tests > ExtraMathTest


1 package JSci.tests;
2
3 import JSci.GlobalSettings;
4 import JSci.maths.*;
5
6 /**
7 * Testcase for extra math methods.
8 * @author Mark Hale
9 */
10 public class ExtraMathTest extends junit.framework.TestCase {
11         public static void main(String JavaDoc arg[]) {
12                 junit.textui.TestRunner.run(ExtraMathTest.class);
13         }
14         public ExtraMathTest(String JavaDoc name) {
15                 super(name);
16         }
17         protected void setUp() {
18                 GlobalSettings.ZERO_TOL=1.0e-9;
19         }
20     private void assertIdentical(double exp, double actual) {
21         assertEquals(new Double JavaDoc(exp), new Double JavaDoc(actual));
22     }
23     public void testAsinh() {
24         assertIdentical(-0.0, ExtraMath.asinh(-0.0));
25         assertIdentical(Double.NEGATIVE_INFINITY, ExtraMath.asinh(Double.NEGATIVE_INFINITY));
26                 double x = Math.random();
27                 assertEquals(x, ExtraMath.asinh(ExtraMath.sinh(x)), GlobalSettings.ZERO_TOL);
28     }
29     public void testAcosh() {
30                 double x = Math.random();
31                 assertEquals(x, ExtraMath.acosh(ExtraMath.cosh(x)), GlobalSettings.ZERO_TOL);
32     }
33     public void testAtanh() {
34         assertIdentical(-0.0, ExtraMath.atanh(-0.0));
35                 double x = Math.random();
36                 assertEquals(x, ExtraMath.atanh(ExtraMath.tanh(x)), GlobalSettings.ZERO_TOL);
37     }
38     public void testAcsch() {
39                 double x = Math.random();
40                 assertEquals(x, ExtraMath.acsch(ExtraMath.csch(x)), GlobalSettings.ZERO_TOL);
41     }
42     public void testAsech() {
43                 double x = Math.random();
44                 assertEquals(x, ExtraMath.asech(ExtraMath.sech(x)), GlobalSettings.ZERO_TOL);
45     }
46     public void testAcoth() {
47                 double x = Math.random();
48                 assertEquals(x, ExtraMath.acoth(ExtraMath.coth(x)), GlobalSettings.ZERO_TOL);
49     }
50         public void testRound() {
51         // +ve value, -ve exp, round-up
52 assertEquals(0.0035, ExtraMath.round(0.00345238, 2), 0.0);
53         // -ve value, -ve exp, round-down
54 assertEquals(-0.0000345, ExtraMath.round(-0.0000345238, 3), 0.0);
55         // +ve value, +ve exp, round-down
56 assertEquals(1900.0, ExtraMath.round(1900.0001, 3), 0.0);
57         // -ve value, +ve exp, round-up
58 assertEquals(-3400000.0, ExtraMath.round(-3450000.0, 2), 0.0);
59         }
60 }
61
Popular Tags