1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
|
/*
* Copyright (C) 2011 The Guava Authors
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
* in compliance with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software distributed under the
* License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
* express or implied. See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.google.common.primitives;
import junit.framework.TestCase;
import com.google.common.annotations.GwtCompatible;
import com.google.common.annotations.GwtIncompatible;
import com.google.common.collect.ImmutableSet;
import com.google.common.testing.EqualsTester;
import com.google.common.testing.NullPointerTester;
import com.google.common.testing.SerializableTester;
/**
* Tests for {@code UnsignedInteger}.
*
* @author Louis Wasserman
*/
@GwtCompatible(emulated = true)
public class UnsignedIntegerTest extends TestCase {
private static final ImmutableSet<Integer> TEST_INTS;
private static int force32(int value) {
// GWT doesn't overflow values to make them 32-bit, so we need to force it.
return value & 0xffffffff;
}
static {
ImmutableSet.Builder<Integer> testIntsBuilder = ImmutableSet.builder();
for (int i = -3; i <= 3; i++) {
testIntsBuilder.add(i).add(-i).add(force32(Integer.MIN_VALUE + i))
.add(force32(Integer.MAX_VALUE + i));
}
TEST_INTS = testIntsBuilder.build();
}
public void testAsUnsignedAndIntValueAreInverses() {
for (int value : TEST_INTS) {
assertEquals(UnsignedInts.toString(value), value, UnsignedInteger.asUnsigned(value)
.intValue());
}
}
public void testAsUnsignedLongValue() {
for (int value : TEST_INTS) {
long expected = value & 0xffffffffL;
assertEquals(UnsignedInts.toString(value), expected, UnsignedInteger.asUnsigned(value)
.longValue());
}
}
public void testToString() {
for (int value : TEST_INTS) {
UnsignedInteger unsignedValue = UnsignedInteger.asUnsigned(value);
assertEquals(unsignedValue.bigIntegerValue().toString(), unsignedValue.toString());
}
}
@GwtIncompatible("too slow")
public void testToStringRadix() {
for (int radix = Character.MIN_RADIX; radix <= Character.MAX_RADIX; radix++) {
for (int l : TEST_INTS) {
UnsignedInteger value = UnsignedInteger.asUnsigned(l);
assertEquals(value.bigIntegerValue().toString(radix), value.toString(radix));
}
}
}
public void testToStringRadixQuick() {
int[] radices = {2, 3, 5, 7, 10, 12, 16, 21, 31, 36};
for (int radix : radices) {
for (int l : TEST_INTS) {
UnsignedInteger value = UnsignedInteger.asUnsigned(l);
assertEquals(value.bigIntegerValue().toString(radix), value.toString(radix));
}
}
}
public void testFloatValue() {
for (int value : TEST_INTS) {
UnsignedInteger unsignedValue = UnsignedInteger.asUnsigned(value);
assertEquals(unsignedValue.bigIntegerValue().floatValue(), unsignedValue.floatValue());
}
}
public void testDoubleValue() {
for (int value : TEST_INTS) {
UnsignedInteger unsignedValue = UnsignedInteger.asUnsigned(value);
assertEquals(unsignedValue.bigIntegerValue().doubleValue(), unsignedValue.doubleValue());
}
}
public void testAdd() {
for (int a : TEST_INTS) {
for (int b : TEST_INTS) {
UnsignedInteger aUnsigned = UnsignedInteger.asUnsigned(a);
UnsignedInteger bUnsigned = UnsignedInteger.asUnsigned(b);
int expected = aUnsigned.bigIntegerValue().add(bUnsigned.bigIntegerValue()).intValue();
UnsignedInteger unsignedSum = aUnsigned.add(bUnsigned);
assertEquals(expected, unsignedSum.intValue());
}
}
}
public void testSubtract() {
for (int a : TEST_INTS) {
for (int b : TEST_INTS) {
UnsignedInteger aUnsigned = UnsignedInteger.asUnsigned(a);
UnsignedInteger bUnsigned = UnsignedInteger.asUnsigned(b);
int expected =
force32(aUnsigned.bigIntegerValue().subtract(bUnsigned.bigIntegerValue()).intValue());
UnsignedInteger unsignedSub = aUnsigned.subtract(bUnsigned);
assertEquals(expected, unsignedSub.intValue());
}
}
}
@GwtIncompatible("multiply")
public void testMultiply() {
for (int a : TEST_INTS) {
for (int b : TEST_INTS) {
UnsignedInteger aUnsigned = UnsignedInteger.asUnsigned(a);
UnsignedInteger bUnsigned = UnsignedInteger.asUnsigned(b);
int expected =
force32(aUnsigned.bigIntegerValue().multiply(bUnsigned.bigIntegerValue()).intValue());
UnsignedInteger unsignedMul = aUnsigned.multiply(bUnsigned);
assertEquals(aUnsigned + " * " + bUnsigned, expected, unsignedMul.intValue());
}
}
}
public void testDivide() {
for (int a : TEST_INTS) {
for (int b : TEST_INTS) {
if (b != 0) {
UnsignedInteger aUnsigned = UnsignedInteger.asUnsigned(a);
UnsignedInteger bUnsigned = UnsignedInteger.asUnsigned(b);
int expected =
aUnsigned.bigIntegerValue().divide(bUnsigned.bigIntegerValue()).intValue();
UnsignedInteger unsignedDiv = aUnsigned.divide(bUnsigned);
assertEquals(expected, unsignedDiv.intValue());
}
}
}
}
public void testDivideByZeroThrows() {
for (int a : TEST_INTS) {
try {
UnsignedInteger.asUnsigned(a).divide(UnsignedInteger.ZERO);
fail("Expected ArithmeticException");
} catch (ArithmeticException expected) {}
}
}
public void testRemainder() {
for (int a : TEST_INTS) {
for (int b : TEST_INTS) {
if (b != 0) {
UnsignedInteger aUnsigned = UnsignedInteger.asUnsigned(a);
UnsignedInteger bUnsigned = UnsignedInteger.asUnsigned(b);
int expected =
aUnsigned.bigIntegerValue().remainder(bUnsigned.bigIntegerValue()).intValue();
UnsignedInteger unsignedRem = aUnsigned.remainder(bUnsigned);
assertEquals(expected, unsignedRem.intValue());
}
}
}
}
public void testRemainderByZero() {
for (int a : TEST_INTS) {
try {
UnsignedInteger.asUnsigned(a).remainder(UnsignedInteger.ZERO);
fail("Expected ArithmeticException");
} catch (ArithmeticException expected) {}
}
}
public void testCompare() {
for (int a : TEST_INTS) {
for (int b : TEST_INTS) {
UnsignedInteger aUnsigned = UnsignedInteger.asUnsigned(a);
UnsignedInteger bUnsigned = UnsignedInteger.asUnsigned(b);
assertEquals(aUnsigned.bigIntegerValue().compareTo(bUnsigned.bigIntegerValue()),
aUnsigned.compareTo(bUnsigned));
}
}
}
@GwtIncompatible("too slow")
public void testEqualsAndValueOf() {
EqualsTester equalsTester = new EqualsTester();
for (int a : TEST_INTS) {
long value = a & 0xffffffffL;
equalsTester.addEqualityGroup(UnsignedInteger.asUnsigned(a), UnsignedInteger.valueOf(value),
UnsignedInteger.valueOf(Long.toString(value)),
UnsignedInteger.valueOf(Long.toString(value, 16), 16));
}
equalsTester.testEquals();
}
public void testIntValue() {
for (int a : TEST_INTS) {
UnsignedInteger aUnsigned = UnsignedInteger.asUnsigned(a);
int intValue = aUnsigned.bigIntegerValue().intValue();
assertEquals(intValue, aUnsigned.intValue());
}
}
@GwtIncompatible("serialization")
public void testSerialization() {
for (int a : TEST_INTS) {
SerializableTester.reserializeAndAssert(UnsignedInteger.asUnsigned(a));
}
}
@GwtIncompatible("NullPointerTester")
public void testNulls() throws Exception {
NullPointerTester tester = new NullPointerTester();
tester.setDefault(UnsignedInteger.class, UnsignedInteger.ONE);
tester.testAllPublicStaticMethods(UnsignedInteger.class);
}
}
|
