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 26 * @summary Unit tests for java.util.UUID 27 */ 28 29 import java.util.*; 30 31 public class UUIDTest { 32 33 static Random generator = new Random(); 34 35 public static void main(String[] args) throws Exception { 36 containsTest(); 37 randomUUIDTest(); 38 nameUUIDFromBytesTest(); 39 stringTest(); 40 versionTest(); 41 variantTest(); 42 timestampTest(); 43 clockSequenceTest(); 44 nodeTest(); 45 hashCodeEqualsTest(); 46 compareTo(); 47 } 48 49 // Verify that list.contains detects UUID collisons 50 private static void containsTest() throws Exception { 51 List list = new LinkedList(); 52 list.add(new UUID(4,4)); 53 if (!list.contains(new UUID(4,4))) 54 throw new Exception("contains test did not work as expected"); 55 } 56 57 private static void randomUUIDTest() throws Exception { 58 List list = new LinkedList(); 59 for (int i=0; i<100; i++) { 60 UUID u1 = UUID.randomUUID(); 61 if (4 != u1.version()) { 62 throw new Exception("bad version"); 63 } 64 if (2 != u1.variant()) { 65 throw new Exception("bad variant"); 66 } 67 if (list.contains(u1)) 68 throw new Exception("random UUID collision very unlikely"); 69 list.add(u1); 70 } 71 } 72 73 private static void nameUUIDFromBytesTest() throws Exception { 74 Random byteSource = new Random(); 75 byte[] someBytes = new byte[12]; 76 List list = new LinkedList(); 77 for (int i=0; i<100; i++) { 78 byteSource.nextBytes(someBytes); 79 UUID u1 = UUID.nameUUIDFromBytes(someBytes); 80 if (3 != u1.version()) { 81 throw new Exception("bad version"); 82 } 83 if (2 != u1.variant()) { 84 throw new Exception("bad variant"); 85 } 86 if (list.contains(u1)) 87 throw new Exception("byte UUID collision very unlikely"); 88 list.add(u1); 89 } 90 } 91 92 private static void stringTest() throws Exception { 93 for (int i=0; i<100; i++) { 94 UUID u1 = UUID.randomUUID(); 95 UUID u2 = UUID.fromString(u1.toString()); 96 if (!u1.equals(u2)) 97 throw new Exception("UUID -> string -> UUID failed"); 98 } 99 100 testFromStringError("-0"); 101 testFromStringError("x"); 102 testFromStringError("----"); 103 testFromStringError("-0-0-0-0"); 104 testFromStringError("0-0-0-0-"); 105 testFromStringError("0-0-0-0-0-"); 106 testFromStringError("0-0-0-0-x"); 107 } 108 109 private static void testFromStringError(String str) { 110 try { 111 UUID test = UUID.fromString(str); 112 throw new RuntimeException("Should have thrown IAE"); 113 } catch (IllegalArgumentException iae) { 114 // pass 115 } 116 } 117 118 private static void versionTest() throws Exception { 119 UUID test = UUID.randomUUID(); 120 if (test.version() != 4) 121 throw new Exception("randomUUID not type 4"); 122 Random byteSource = new Random(); 123 byte[] someBytes = new byte[12]; 124 byteSource.nextBytes(someBytes); 125 test = UUID.nameUUIDFromBytes(someBytes); 126 if (test.version() != 3) 127 throw new Exception("nameUUIDFromBytes not type 3"); 128 test = UUID.fromString("9835451d-e2e0-1e41-8a5a-be785f17dcda"); 129 if (test.version() != 1) 130 throw new Exception("wrong version fromString 1"); 131 test = UUID.fromString("9835451d-e2e0-2e41-8a5a-be785f17dcda"); 132 if (test.version() != 2) 133 throw new Exception("wrong version fromString 2"); 134 test = UUID.fromString("9835451d-e2e0-3e41-8a5a-be785f17dcda"); 135 if (test.version() != 3) 136 throw new Exception("wrong version fromString 3"); 137 test = UUID.fromString("9835451d-e2e0-4e41-8a5a-be785f17dcda"); 138 if (test.version() != 4) 139 throw new Exception("wrong version fromString 4"); 140 test = new UUID(0x0000000000001000L, 55L); 141 if (test.version() != 1) 142 throw new Exception("wrong version from bit set to 1"); 143 test = new UUID(0x0000000000002000L, 55L); 144 if (test.version() != 2) 145 throw new Exception("wrong version from bit set to 2"); 146 test = new UUID(0x0000000000003000L, 55L); 147 if (test.version() != 3) 148 throw new Exception("wrong version from bit set to 3"); 149 test = new UUID(0x0000000000004000L, 55L); 150 if (test.version() != 4) 151 throw new Exception("wrong version from bit set to 4"); 152 } 153 154 private static void variantTest() throws Exception { 155 UUID test = UUID.randomUUID(); 156 if (test.variant() != 2) 157 throw new Exception("randomUUID not variant 2"); 158 Random byteSource = new Random(); 159 byte[] someBytes = new byte[12]; 160 byteSource.nextBytes(someBytes); 161 test = UUID.nameUUIDFromBytes(someBytes); 162 if (test.variant() != 2) 163 throw new Exception("nameUUIDFromBytes not variant 2"); 164 test = new UUID(55L, 0x0000000000001000L); 165 if (test.variant() != 0) 166 throw new Exception("wrong variant from bit set to 0"); 167 test = new UUID(55L, 0x8000000000001000L); 168 if (test.variant() != 2) 169 throw new Exception("wrong variant from bit set to 2"); 170 test = new UUID(55L, 0xc000000000001000L); 171 if (test.variant() != 6) 172 throw new Exception("wrong variant from bit set to 6"); 173 test = new UUID(55L, 0xe000000000001000L); 174 if (test.variant() != 7) 175 throw new Exception("wrong variant from bit set to 7"); 176 } 177 178 private static void timestampTest() throws Exception { 179 UUID test = UUID.randomUUID(); 180 try { 181 test.timestamp(); 182 throw new Exception("Expected exception not thrown"); 183 } catch (UnsupportedOperationException uoe) { 184 // Correct result 185 } 186 test = UUID.fromString("00000001-0000-1000-8a5a-be785f17dcda"); 187 if (test.timestamp() != 1) 188 throw new Exception("Incorrect timestamp"); 189 test = UUID.fromString("00000400-0000-1000-8a5a-be785f17dcda"); 190 if (test.timestamp() != 1024) 191 throw new Exception("Incorrect timestamp"); 192 test = UUID.fromString("FFFFFFFF-FFFF-1FFF-8a5a-be785f17dcda"); 193 if (test.timestamp() != Long.MAX_VALUE>>3) 194 throw new Exception("Incorrect timestamp"); 195 } 196 197 private static void clockSequenceTest() throws Exception { 198 UUID test = UUID.randomUUID(); 199 try { 200 test.clockSequence(); 201 throw new Exception("Expected exception not thrown"); 202 } catch (UnsupportedOperationException uoe) { 203 // Correct result 204 } 205 test = UUID.fromString("00000001-0000-1000-8001-be785f17dcda"); 206 if (test.clockSequence() != 1) 207 throw new Exception("Incorrect sequence"); 208 test = UUID.fromString("00000001-0000-1000-8002-be785f17dcda"); 209 if (test.clockSequence() != 2) 210 throw new Exception("Incorrect sequence"); 211 test = UUID.fromString("00000001-0000-1000-8010-be785f17dcda"); 212 if (test.clockSequence() != 16) 213 throw new Exception("Incorrect sequence"); 214 test = UUID.fromString("00000001-0000-1000-bFFF-be785f17dcda"); 215 if (test.clockSequence() != ((2L<<13)-1)) // 2^14 - 1 216 throw new Exception("Incorrect sequence"); 217 } 218 219 private static void nodeTest() throws Exception { 220 UUID test = UUID.randomUUID(); 221 try { 222 test.node(); 223 throw new Exception("Expected exception not thrown"); 224 } catch (UnsupportedOperationException uoe) { 225 // Correct result 226 } 227 test = UUID.fromString("00000001-0000-1000-8001-000000000001"); 228 if (test.node() != 1) 229 throw new Exception("Incorrect node"); 230 test = UUID.fromString("00000001-0000-1000-8002-FFFFFFFFFFFF"); 231 if (test.node() != ((2L<<47)-1)) // 2^48 - 1 232 throw new Exception("Incorrect node"); 233 } 234 235 private static void hashCodeEqualsTest() throws Exception { 236 // If two UUIDs are equal they must have the same hashCode 237 for (int i=0; i<100; i++) { 238 UUID u1 = UUID.randomUUID(); 239 UUID u2 = UUID.fromString(u1.toString()); 240 if (u1.hashCode() != u2.hashCode()) 241 throw new Exception("Equal UUIDs with different hashcodes"); 242 } 243 // Test equality of UUIDs with tampered bits 244 for (int i=0; i<1000; i++) { 245 long l = generator.nextLong(); 246 long l2 = generator.nextLong(); 247 int position = generator.nextInt(64); 248 UUID u1 = new UUID(l, l2); 249 l = l ^ (1L << position); 250 UUID u2 = new UUID(l, l2); 251 if (u1.equals(u2)) 252 throw new Exception("UUIDs with different bits equal"); 253 } 254 } 255 256 private static void compareTo() throws Exception { 257 UUID id = new UUID(33L, 63L); 258 UUID id2 = new UUID(34L, 62L); 259 UUID id3 = new UUID(34L, 63L); 260 UUID id4 = new UUID(34L, 64L); 261 UUID id5 = new UUID(35L, 63L); 262 263 if ((id.compareTo(id2) >= 0) || 264 (id2.compareTo(id3) >= 0) || 265 (id3.compareTo(id4) >= 0) || 266 (id4.compareTo(id5) >= 0)) 267 throw new RuntimeException("compareTo failure"); 268 269 if ((id5.compareTo(id4) <= 0) || 270 (id4.compareTo(id3) <= 0) || 271 (id3.compareTo(id2) <= 0) || 272 (id2.compareTo(id) <= 0)) 273 throw new RuntimeException("compareTo failure"); 274 275 if (id.compareTo(id) != 0) 276 throw new RuntimeException("compareTo failure"); 277 278 } 279 280 }