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Java > Open Source Codes > JSci > tests > ComplexTest


1 package JSci.tests;
2
3 import JSci.GlobalSettings;
4 import JSci.maths.Complex;
5 import JSci.maths.ExtraMath;
6 import junit.framework.*;
7
8 /**
9 * Testcase for complex numbers.
10 * @author Mark Hale
11 */

12 public class ComplexTest extends junitx.extensions.EqualsHashCodeTestCase {
13         private double x, y;
14         private double u, v;
15
16         public static void main(String JavaDoc arg[]) {
17                 junit.textui.TestRunner.run(suite());
18         }
19         public static Test suite() {
20                 return new junit.extensions.RepeatedTest(new TestSuite(ComplexTest.class), 5);
21         }
22         public ComplexTest(String JavaDoc name) {
23                 super(name);
24         }
25         protected void setUp() throws Exception JavaDoc {
26                 GlobalSettings.ZERO_TOL=1.0e-9;
27                 x = ExtraMath.random(-1.0, 1.0);
28                 y = ExtraMath.random(-1.0, 1.0);
29                 u = ExtraMath.random(-1.0, 1.0);
30                 v = ExtraMath.random(-1.0, 1.0);
31                 super.setUp();
32         }
33         protected Object JavaDoc createInstance() {
34                 return new Complex(x, y);
35         }
36         protected Object JavaDoc createNotEqualInstance() {
37                 return new Complex(u, v);
38         }
39         public void testParseString() {
40                 Complex expected = (Complex) createInstance();
41                 Complex actual = new Complex(expected.toString());
42                 assertEquals(expected, actual);
43                 expected = new Complex(0.0, Double.MAX_VALUE);
44                 actual = new Complex(expected.toString());
45                 assertEquals(expected, actual);
46                 expected = new Complex(Double.MIN_VALUE, 0.0);
47                 actual = new Complex(expected.toString());
48                 assertEquals(expected, actual);
49         }
50         public void testZero() {
51                 assertTrue("0 is zero", Complex.ZERO.isZero());
52                 Complex delta = (Complex) createInstance();
53                 delta = delta.multiply(Math.random()*GlobalSettings.ZERO_TOL/delta.mod());
54                 assertTrue("delta is zero", delta.isZero());
55                 assertTrue("delta == zero", delta.equals(Complex.ZERO));
56                 Complex z = (Complex) createNotEqualInstance();
57                 assertTrue("z == z + delta", z.equals(z.add(delta)));
58         }
59         public void testSin() {
60                 Complex expected = (Complex) createInstance();
61                 Complex actual=Complex.sin(Complex.asin(expected));
62                 assertEquals(expected, actual);
63         }
64         public void testCos() {
65                 Complex expected = (Complex) createInstance();
66                 Complex actual=Complex.cos(Complex.acos(expected));
67                 assertEquals(expected, actual);
68         }
69         public void testTan() {
70                 Complex expected = (Complex) createInstance();
71                 Complex actual=Complex.tan(Complex.atan(expected));
72                 assertEquals(expected, actual);
73         }
74         public void testSinh() {
75                 Complex expected = (Complex) createInstance();
76                 Complex actual=Complex.sinh(Complex.asinh(expected));
77                 assertEquals(expected, actual);
78         }
79         public void testCosh() {
80                 Complex expected = (Complex) createInstance();
81                 Complex actual=Complex.cosh(Complex.acosh(expected));
82                 assertEquals(expected, actual);
83         }
84         public void testTanh() {
85                 Complex expected = (Complex) createInstance();
86                 Complex actual=Complex.tanh(Complex.atanh(expected));
87                 assertEquals(expected, actual);
88         }
89 }
90
91
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