1 /*
2 * Copyright (c) 2003, 2012, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 */
23
24 /* @test
25 * @bug 4173528 5068772 8148936
26 * @summary Unit tests for java.util.UUID
27 * @key randomness
28 * @run main/othervm -XX:+CompactStrings UUIDTest
29 * @run main/othervm -XX:-CompactStrings UUIDTest
30 */
31
32 import java.util.*;
33
34 public class UUIDTest {
35
36 static Random generator = new Random();
37
38 public static void main(String[] args) throws Exception {
39 containsTest();
40 randomUUIDTest();
41 nameUUIDFromBytesTest();
42 stringTest();
43 versionTest();
44 variantTest();
45 timestampTest();
46 clockSequenceTest();
47 nodeTest();
48 hashCodeEqualsTest();
49 compareTo();
50 }
51
52 // Verify that list.contains detects UUID collisons
53 private static void containsTest() throws Exception {
54 List list = new LinkedList();
55 list.add(new UUID(4,4));
56 if (!list.contains(new UUID(4,4)))
57 throw new Exception("contains test did not work as expected");
58 }
59
60 private static void randomUUIDTest() throws Exception {
61 List list = new LinkedList();
62 for (int i=0; i<100; i++) {
63 UUID u1 = UUID.randomUUID();
64 if (4 != u1.version()) {
65 throw new Exception("bad version");
66 }
67 if (2 != u1.variant()) {
68 throw new Exception("bad variant");
69 }
70 if (list.contains(u1))
71 throw new Exception("random UUID collision very unlikely");
72 list.add(u1);
73 }
74 }
75
76 private static void nameUUIDFromBytesTest() throws Exception {
77 Random byteSource = new Random();
78 byte[] someBytes = new byte[12];
79 List list = new LinkedList();
80 for (int i=0; i<100; i++) {
81 byteSource.nextBytes(someBytes);
82 UUID u1 = UUID.nameUUIDFromBytes(someBytes);
83 if (3 != u1.version()) {
84 throw new Exception("bad version");
85 }
86 if (2 != u1.variant()) {
87 throw new Exception("bad variant");
88 }
89 if (list.contains(u1))
90 throw new Exception("byte UUID collision very unlikely");
91 list.add(u1);
92 }
93 }
94
95 private static void stringTest() throws Exception {
96 for (int i=0; i<100; i++) {
97 UUID u1 = UUID.randomUUID();
98 UUID u2 = UUID.fromString(u1.toString().toLowerCase());
99 UUID u3 = UUID.fromString(u1.toString().toUpperCase());
100 if (!u1.equals(u2) || !u1.equals(u3))
101 throw new Exception("UUID -> string -> UUID failed");
102 }
103
104 testFromStringError("-0");
105 testFromStringError("x");
106 testFromStringError("----");
107 testFromStringError("-0-0-0-0");
108 testFromStringError("0-0-0-0-");
109 testFromStringError("0-0-0-0-0-");
110 testFromStringError("0-0-0-0-x");
111 }
112
113 private static void testFromStringError(String str) {
114 try {
115 UUID test = UUID.fromString(str);
116 throw new RuntimeException("Should have thrown IAE");
117 } catch (IllegalArgumentException iae) {
118 // pass
119 }
120 }
121
122 private static void versionTest() throws Exception {
123 UUID test = UUID.randomUUID();
124 if (test.version() != 4)
125 throw new Exception("randomUUID not type 4");
126 Random byteSource = new Random();
127 byte[] someBytes = new byte[12];
128 byteSource.nextBytes(someBytes);
129 test = UUID.nameUUIDFromBytes(someBytes);
130 if (test.version() != 3)
131 throw new Exception("nameUUIDFromBytes not type 3");
132 test = UUID.fromString("9835451d-e2e0-1e41-8a5a-be785f17dcda");
133 if (test.version() != 1)
134 throw new Exception("wrong version fromString 1");
135 test = UUID.fromString("9835451d-e2e0-2e41-8a5a-be785f17dcda");
136 if (test.version() != 2)
137 throw new Exception("wrong version fromString 2");
138 test = UUID.fromString("9835451d-e2e0-3e41-8a5a-be785f17dcda");
139 if (test.version() != 3)
140 throw new Exception("wrong version fromString 3");
141 test = UUID.fromString("9835451d-e2e0-4e41-8a5a-be785f17dcda");
142 if (test.version() != 4)
143 throw new Exception("wrong version fromString 4");
144 test = new UUID(0x0000000000001000L, 55L);
145 if (test.version() != 1)
146 throw new Exception("wrong version from bit set to 1");
147 test = new UUID(0x0000000000002000L, 55L);
148 if (test.version() != 2)
149 throw new Exception("wrong version from bit set to 2");
150 test = new UUID(0x0000000000003000L, 55L);
151 if (test.version() != 3)
152 throw new Exception("wrong version from bit set to 3");
153 test = new UUID(0x0000000000004000L, 55L);
154 if (test.version() != 4)
155 throw new Exception("wrong version from bit set to 4");
156 }
157
158 private static void variantTest() throws Exception {
159 UUID test = UUID.randomUUID();
160 if (test.variant() != 2)
161 throw new Exception("randomUUID not variant 2");
162 Random byteSource = new Random();
163 byte[] someBytes = new byte[12];
164 byteSource.nextBytes(someBytes);
165 test = UUID.nameUUIDFromBytes(someBytes);
166 if (test.variant() != 2)
167 throw new Exception("nameUUIDFromBytes not variant 2");
168 test = new UUID(55L, 0x0000000000001000L);
169 if (test.variant() != 0)
170 throw new Exception("wrong variant from bit set to 0");
171 test = new UUID(55L, 0x8000000000001000L);
172 if (test.variant() != 2)
173 throw new Exception("wrong variant from bit set to 2");
174 test = new UUID(55L, 0xc000000000001000L);
175 if (test.variant() != 6)
176 throw new Exception("wrong variant from bit set to 6");
177 test = new UUID(55L, 0xe000000000001000L);
178 if (test.variant() != 7)
179 throw new Exception("wrong variant from bit set to 7");
180 }
181
182 private static void timestampTest() throws Exception {
183 UUID test = UUID.randomUUID();
184 try {
185 test.timestamp();
186 throw new Exception("Expected exception not thrown");
187 } catch (UnsupportedOperationException uoe) {
188 // Correct result
189 }
190 test = UUID.fromString("00000001-0000-1000-8a5a-be785f17dcda");
191 if (test.timestamp() != 1)
192 throw new Exception("Incorrect timestamp");
193 test = UUID.fromString("00000400-0000-1000-8a5a-be785f17dcda");
194 if (test.timestamp() != 1024)
195 throw new Exception("Incorrect timestamp");
196 test = UUID.fromString("FFFFFFFF-FFFF-1FFF-8a5a-be785f17dcda");
197 if (test.timestamp() != Long.MAX_VALUE>>3)
198 throw new Exception("Incorrect timestamp");
199 }
200
201 private static void clockSequenceTest() throws Exception {
202 UUID test = UUID.randomUUID();
203 try {
204 test.clockSequence();
205 throw new Exception("Expected exception not thrown");
206 } catch (UnsupportedOperationException uoe) {
207 // Correct result
208 }
209 test = UUID.fromString("00000001-0000-1000-8001-be785f17dcda");
210 if (test.clockSequence() != 1)
211 throw new Exception("Incorrect sequence");
212 test = UUID.fromString("00000001-0000-1000-8002-be785f17dcda");
213 if (test.clockSequence() != 2)
214 throw new Exception("Incorrect sequence");
215 test = UUID.fromString("00000001-0000-1000-8010-be785f17dcda");
216 if (test.clockSequence() != 16)
217 throw new Exception("Incorrect sequence");
218 test = UUID.fromString("00000001-0000-1000-bFFF-be785f17dcda");
219 if (test.clockSequence() != ((2L<<13)-1)) // 2^14 - 1
220 throw new Exception("Incorrect sequence");
221 }
222
223 private static void nodeTest() throws Exception {
224 UUID test = UUID.randomUUID();
225 try {
226 test.node();
227 throw new Exception("Expected exception not thrown");
228 } catch (UnsupportedOperationException uoe) {
229 // Correct result
230 }
231 test = UUID.fromString("00000001-0000-1000-8001-000000000001");
232 if (test.node() != 1)
233 throw new Exception("Incorrect node");
234 test = UUID.fromString("00000001-0000-1000-8002-FFFFFFFFFFFF");
235 if (test.node() != ((2L<<47)-1)) // 2^48 - 1
236 throw new Exception("Incorrect node");
237 }
238
239 private static void hashCodeEqualsTest() throws Exception {
240 // If two UUIDs are equal they must have the same hashCode
241 for (int i=0; i<100; i++) {
242 UUID u1 = UUID.randomUUID();
243 UUID u2 = UUID.fromString(u1.toString());
244 if (u1.hashCode() != u2.hashCode())
245 throw new Exception("Equal UUIDs with different hashcodes");
246 }
247 // Test equality of UUIDs with tampered bits
248 for (int i=0; i<1000; i++) {
249 long l = generator.nextLong();
250 long l2 = generator.nextLong();
251 int position = generator.nextInt(64);
252 UUID u1 = new UUID(l, l2);
253 l = l ^ (1L << position);
254 UUID u2 = new UUID(l, l2);
255 if (u1.equals(u2))
256 throw new Exception("UUIDs with different bits equal");
257 }
258 }
259
260 private static void compareTo() throws Exception {
261 UUID id = new UUID(33L, 63L);
262 UUID id2 = new UUID(34L, 62L);
263 UUID id3 = new UUID(34L, 63L);
264 UUID id4 = new UUID(34L, 64L);
265 UUID id5 = new UUID(35L, 63L);
266
267 if ((id.compareTo(id2) >= 0) ||
268 (id2.compareTo(id3) >= 0) ||
269 (id3.compareTo(id4) >= 0) ||
270 (id4.compareTo(id5) >= 0))
271 throw new RuntimeException("compareTo failure");
272
273 if ((id5.compareTo(id4) <= 0) ||
274 (id4.compareTo(id3) <= 0) ||
275 (id3.compareTo(id2) <= 0) ||
276 (id2.compareTo(id) <= 0))
277 throw new RuntimeException("compareTo failure");
278
279 if (id.compareTo(id) != 0)
280 throw new RuntimeException("compareTo failure");
281
282 }
283
284 }