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16
17 package org.apache.commons.math.complex;
18
19 import junit.framework.TestCase;
20
21
24 public class ComplexTest extends TestCase {
25
26 public void testConstructor() {
27 Complex z = new Complex(3.0, 4.0);
28 assertEquals(3.0, z.getReal(), 1.0e-5);
29 assertEquals(4.0, z.getImaginary(), 1.0e-5);
30 }
31
32 public void testConstructorNaN() {
33 Complex z = new Complex(3.0, Double.NaN);
34 assertTrue(z.isNaN());
35
36 z = new Complex(Double.NaN, 4.0);
37 assertTrue(z.isNaN());
38
39 z = new Complex(3.0, 4.0);
40 assertFalse(z.isNaN());
41 }
42
43 public void testAbs() {
44 Complex z = new Complex(3.0, 4.0);
45 assertEquals(5.0, z.abs(), 1.0e-5);
46 }
47
48 public void testAbsNaN() {
49 assertTrue(Double.isNaN(Complex.NaN.abs()));
50 }
51
52 public void testAdd() {
53 Complex x = new Complex(3.0, 4.0);
54 Complex y = new Complex(5.0, 6.0);
55 Complex z = x.add(y);
56 assertEquals(8.0, z.getReal(), 1.0e-5);
57 assertEquals(10.0, z.getImaginary(), 1.0e-5);
58 }
59
60 public void testAddNaN() {
61 Complex x = new Complex(3.0, 4.0);
62 Complex z = x.add(Complex.NaN);
63 assertTrue(z.isNaN());
64 }
65
66 public void testConjugate() {
67 Complex x = new Complex(3.0, 4.0);
68 Complex z = x.conjugate();
69 assertEquals(3.0, z.getReal(), 1.0e-5);
70 assertEquals(-4.0, z.getImaginary(), 1.0e-5);
71 }
72
73 public void testConjugateNaN() {
74 Complex z = Complex.NaN.conjugate();
75 assertTrue(z.isNaN());
76 }
77
78 public void testDivide() {
79 Complex x = new Complex(3.0, 4.0);
80 Complex y = new Complex(5.0, 6.0);
81 Complex z = x.divide(y);
82 assertEquals(39.0 / 61.0, z.getReal(), 1.0e-5);
83 assertEquals(2.0 / 61.0, z.getImaginary(), 1.0e-5);
84 }
85
86 public void testDivideNaN() {
87 Complex x = new Complex(3.0, 4.0);
88 Complex z = x.divide(Complex.NaN);
89 assertTrue(z.isNaN());
90 }
91
92 public void testMultiply() {
93 Complex x = new Complex(3.0, 4.0);
94 Complex y = new Complex(5.0, 6.0);
95 Complex z = x.multiply(y);
96 assertEquals(-9.0, z.getReal(), 1.0e-5);
97 assertEquals(38.0, z.getImaginary(), 1.0e-5);
98 }
99
100 public void testMultiplyNaN() {
101 Complex x = new Complex(3.0, 4.0);
102 Complex z = x.multiply(Complex.NaN);
103 assertTrue(z.isNaN());
104 }
105
106 public void testNegate() {
107 Complex x = new Complex(3.0, 4.0);
108 Complex z = x.negate();
109 assertEquals(-3.0, z.getReal(), 1.0e-5);
110 assertEquals(-4.0, z.getImaginary(), 1.0e-5);
111 }
112
113 public void testNegateNaN() {
114 Complex z = Complex.NaN.negate();
115 assertTrue(z.isNaN());
116 }
117
118 public void testSubtract() {
119 Complex x = new Complex(3.0, 4.0);
120 Complex y = new Complex(5.0, 6.0);
121 Complex z = x.subtract(y);
122 assertEquals(-2.0, z.getReal(), 1.0e-5);
123 assertEquals(-2.0, z.getImaginary(), 1.0e-5);
124 }
125
126 public void testSubtractNaN() {
127 Complex x = new Complex(3.0, 4.0);
128 Complex z = x.subtract(Complex.NaN);
129 assertTrue(z.isNaN());
130 }
131
132 public void testEqualsNull() {
133 Complex x = new Complex(3.0, 4.0);
134 assertFalse(x.equals(null));
135 }
136
137 public void testEqualsClass() {
138 Complex x = new Complex(3.0, 4.0);
139 assertFalse(x.equals(this));
140 }
141
142 public void testEqualsSame() {
143 Complex x = new Complex(3.0, 4.0);
144 assertTrue(x.equals(x));
145 }
146
147 public void testEqualsTrue() {
148 Complex x = new Complex(3.0, 4.0);
149 Complex y = new Complex(3.0, 4.0);
150 assertTrue(x.equals(y));
151 }
152
153 public void testEqualsRealDifference() {
154 Complex x = new Complex(0.0, 0.0);
155 Complex y = new Complex(0.0 + Double.MIN_VALUE, 0.0);
156 assertFalse(x.equals(y));
157 }
158
159 public void testEqualsImaginaryDifference() {
160 Complex x = new Complex(0.0, 0.0);
161 Complex y = new Complex(0.0, 0.0 + Double.MIN_VALUE);
162 assertFalse(x.equals(y));
163 }
164 }
165 |
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