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32 package net.sf.retrotranslator.runtime.java.math;
33
34 import java.math.*;
35 import net.sf.retrotranslator.tests.BaseTestCase;
36
37
40 public class _BigDecimalTestCase extends BaseTestCase {
41
42 public void testConstants() throws Exception  {
43 assertEquals(0, BigDecimal.ZERO.intValue());
44 assertEquals(1, BigDecimal.ONE.intValue());
45 assertEquals(10, BigDecimal.TEN.intValue());
46 }
47
48 public void testConvertConstructorArguments() throws Exception {
49 assertEquals(10L, new BigDecimal(10L).longValue());
50 assertEquals(20, new BigDecimal(20).intValue());
51 class MyDecimal extends BigDecimal {
52 public MyDecimal(int val) {
53 super(val);
54 }
55
56 public MyDecimal(long val) {
57 super(val);
58 }
59 }
60 assertEquals(10L, new MyDecimal(10L).longValue());
61 assertEquals(20, new MyDecimal(20).intValue());
62 }
63
64 public void testDivideAndRemainder() throws Exception {
65 BigDecimal dividend = BigDecimal.valueOf(123.4567);
66 assertEquals(4, dividend.scale());
67 BigDecimal divisor = BigDecimal.valueOf(8.9);
68 assertEquals(1, divisor.scale());
69 BigDecimal[] result = dividend.divideAndRemainder(divisor);
70 BigDecimal quotient = result[0];
71 BigDecimal remainder = result[1];
72 assertEquals(13.0, quotient.doubleValue());
73 assertEquals(3, quotient.scale());
74 assertEquals(7.7567, remainder.doubleValue());
75 assertEquals(4, remainder.scale());
76
77 }
78
79 public void testDivideToIntegralValue_scale2() throws Exception {
80 BigDecimal dividend = BigDecimal.valueOf(123.456);
81 assertEquals(3, dividend.scale());
82 BigDecimal divisor = BigDecimal.valueOf(7.8);
83 assertEquals(1, divisor.scale());
84 BigDecimal quotient = dividend.divideToIntegralValue(divisor);
85 assertEquals(15.0, quotient.doubleValue());
86 assertEquals(2, quotient.scale());
87 }
88
89 public void testDivideToIntegralValue_scale0() throws Exception {
90 BigDecimal dividend = BigDecimal.valueOf(123.4);
91 assertEquals(1, dividend.scale());
92 BigDecimal divisor = BigDecimal.valueOf(5.678);
93 assertEquals(3, divisor.scale());
94 BigDecimal quotient = dividend.divideToIntegralValue(divisor);
95 assertEquals(21.0, quotient.doubleValue());
96 assertEquals(0, quotient.scale());
97 }
98
99 public void testDivideToIntegralValue_zeroDividend() throws Exception {
100 BigDecimal dividend = BigDecimal.valueOf(0, 10);
101 assertEquals(10, dividend.scale());
102 BigDecimal divisor = BigDecimal.valueOf(1, 5);
103 assertEquals(5, divisor.scale());
104 BigDecimal quotient = dividend.divideToIntegralValue(divisor);
105 assertEquals(0.0, quotient.doubleValue());
106 assertEquals(5, quotient.scale());
107 }
108
109 public void testDivideToIntegralValue_zeroDivider() throws Exception {
110 BigDecimal dividend = BigDecimal.valueOf(1);
111 BigDecimal divisor = BigDecimal.valueOf(0);
112 try {
113 dividend.divideToIntegralValue(divisor);
114 fail();
115 } catch (ArithmeticException e) {
116 }
118 }
119
120 public void testPow() throws Exception {
121 assertEquals(1, new BigDecimal(10).pow(0).intValue());
122 assertEquals(10, new BigDecimal(10).pow(1).intValue());
123 assertEquals(100, new BigDecimal(10).pow(2).intValue());
124 assertEquals(100000, new BigDecimal(10).pow(5).intValue());
125 try {
126 new BigDecimal(10).pow(-10);
127 fail();
128 } catch (ArithmeticException e) {
129 }
131 }
132
133 public void testSetScale() throws Exception {
134 assertEquals("123.5", new BigDecimal(123.45).setScale(1, BigDecimal.ROUND_HALF_EVEN).toPlainString());
135 assertEquals("120", new BigDecimal(123).setScale(-1, BigDecimal.ROUND_HALF_EVEN).toPlainString());
136 }
137
138 public void testRemainder() throws Exception {
139 BigDecimal dividend = BigDecimal.valueOf(12.3);
140 assertEquals(1, dividend.scale());
141 BigDecimal divisor = BigDecimal.valueOf(4.5678);
142 assertEquals(4, divisor.scale());
143 BigDecimal remainder = dividend.remainder(divisor);
144 assertEquals(3.1644, remainder.doubleValue());
145 assertEquals(4, remainder.scale());
146 }
147
148 public void testToPlainString() throws Exception {
149 assertEquals("1230", new BigDecimal(1230).toPlainString());
150 assertEquals("1.23", new BigDecimal(BigInteger.valueOf(123), 2).toPlainString());
151 }
152
153 public void testValueOf() throws Exception {
154 assertEquals(1.23, BigDecimal.valueOf(1.23).doubleValue());
155 assertEquals(123, BigDecimal.valueOf(123).longValue());
156 }
157
158 } |
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