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16 package org.apache.commons.lang.mutable;
17
18 import junit.framework.Test;
19 import junit.framework.TestCase;
20 import junit.framework.TestSuite;
21 import junit.textui.TestRunner;
22
23
29 public class MutableDoubleTest extends TestCase {
30
31 public MutableDoubleTest(String  testName) {
32 super(testName);
33 }
34
35 public static void main(String [] args) {
36 TestRunner.run(suite());
37 }
38
39 public static Test suite() {
40 return new TestSuite(MutableDoubleTest.class);
41 }
42
43 public void testConstructors() {
45 assertEquals(0d, new MutableDouble().doubleValue(), 0.0001d);
46
47 assertEquals(1d, new MutableDouble(1d).doubleValue(), 0.0001d);
48
49 assertEquals(2d, new MutableDouble(new Double (2d)).doubleValue(), 0.0001d);
50 assertEquals(3d, new MutableDouble(new MutableDouble(3d)).doubleValue(), 0.0001d);
51 try {
52 new MutableDouble(null);
53 fail();
54 } catch (NullPointerException ex) {}
55 }
56
57 public void testGetSet() {
58 final MutableDouble mutNum = new MutableDouble(0d);
59 assertEquals(0d, new MutableDouble().doubleValue(), 0.0001d);
60 assertEquals(new Double (0), new MutableDouble().getValue());
61
62 mutNum.setValue(1);
63 assertEquals(1d, mutNum.doubleValue(), 0.0001d);
64 assertEquals(new Double (1d), mutNum.getValue());
65
66 mutNum.setValue(new Double (2d));
67 assertEquals(2d, mutNum.doubleValue(), 0.0001d);
68 assertEquals(new Double (2d), mutNum.getValue());
69
70 mutNum.setValue(new MutableDouble(3d));
71 assertEquals(3d, mutNum.doubleValue(), 0.0001d);
72 assertEquals(new Double (3d), mutNum.getValue());
73 try {
74 mutNum.setValue(null);
75 fail();
76 } catch (NullPointerException ex) {}
77 try {
78 mutNum.setValue("0");
79 fail();
80 } catch (ClassCastException ex) {}
81 }
82
83 public void testNanInfinite() {
84 MutableDouble mutNum = new MutableDouble(Double.NaN);
85 assertEquals(true, mutNum.isNaN());
86
87 mutNum = new MutableDouble(Double.POSITIVE_INFINITY);
88 assertEquals(true, mutNum.isInfinite());
89
90 mutNum = new MutableDouble(Double.NEGATIVE_INFINITY);
91 assertEquals(true, mutNum.isInfinite());
92 }
93
94 public void testEquals() {
95 final MutableDouble mutNumA = new MutableDouble(0d);
96 final MutableDouble mutNumB = new MutableDouble(0d);
97 final MutableDouble mutNumC = new MutableDouble(1d);
98
99 assertEquals(true, mutNumA.equals(mutNumA));
100 assertEquals(true, mutNumA.equals(mutNumB));
101 assertEquals(true, mutNumB.equals(mutNumA));
102 assertEquals(true, mutNumB.equals(mutNumB));
103 assertEquals(false, mutNumA.equals(mutNumC));
104 assertEquals(false, mutNumB.equals(mutNumC));
105 assertEquals(true, mutNumC.equals(mutNumC));
106 assertEquals(false, mutNumA.equals(null));
107 assertEquals(false, mutNumA.equals(new Double (0d)));
108 assertEquals(false, mutNumA.equals("0"));
109 }
110
111 public void testHashCode() {
112 final MutableDouble mutNumA = new MutableDouble(0d);
113 final MutableDouble mutNumB = new MutableDouble(0d);
114 final MutableDouble mutNumC = new MutableDouble(1d);
115
116 assertEquals(true, mutNumA.hashCode() == mutNumA.hashCode());
117 assertEquals(true, mutNumA.hashCode() == mutNumB.hashCode());
118 assertEquals(false, mutNumA.hashCode() == mutNumC.hashCode());
119 assertEquals(true, mutNumA.hashCode() == new Double (0d).hashCode());
120 }
121
122 public void testCompareTo() {
123 final MutableDouble mutNum = new MutableDouble(0d);
124
125 assertEquals(0, mutNum.compareTo(new MutableDouble(0d)));
126 assertEquals(+1, mutNum.compareTo(new MutableDouble(-1d)));
127 assertEquals(-1, mutNum.compareTo(new MutableDouble(1d)));
128 try {
129 mutNum.compareTo(null);
130 fail();
131 } catch (NullPointerException ex) {}
132 try {
133 mutNum.compareTo(new Double (0d));
134 fail();
135 } catch (ClassCastException ex) {}
136 try {
137 mutNum.compareTo("0");
138 fail();
139 } catch (ClassCastException ex) {}
140 }
141
142 public void testPrimitiveValues() {
143 MutableDouble mutNum = new MutableDouble(1.7);
144
145 assertEquals( 1.7F, mutNum.floatValue(), 0 );
146 assertEquals( 1.7, mutNum.doubleValue(), 0 );
147 assertEquals( (byte) 1, mutNum.byteValue() );
148 assertEquals( (short) 1, mutNum.shortValue() );
149 assertEquals( 1, mutNum.intValue() );
150 assertEquals( 1L, mutNum.longValue() );
151 }
152
153 public void testToString() {
154 assertEquals("0.0", new MutableDouble(0d).toString());
155 assertEquals("10.0", new MutableDouble(10d).toString());
156 assertEquals("-123.0", new MutableDouble(-123d).toString());
157 }
158
159 }
160 |
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