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/*
* Copyright (c) 2003, 2012, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
/* @test
* @bug 4173528 5068772 8148936
* @summary Unit tests for java.util.UUID
* @key randomness
* @run main/othervm -XX:+CompactStrings UUIDTest
* @run main/othervm -XX:-CompactStrings UUIDTest
*/
import java.util.*;
public class UUIDTest {
static Random generator = new Random();
public static void main(String[] args) throws Exception {
containsTest();
randomUUIDTest();
nameUUIDFromBytesTest();
stringTest();
versionTest();
variantTest();
timestampTest();
clockSequenceTest();
nodeTest();
hashCodeEqualsTest();
compareTo();
}
// Verify that list.contains detects UUID collisons
private static void containsTest() throws Exception {
List list = new LinkedList();
list.add(new UUID(4,4));
if (!list.contains(new UUID(4,4)))
throw new Exception("contains test did not work as expected");
}
private static void randomUUIDTest() throws Exception {
List list = new LinkedList();
for (int i=0; i<100; i++) {
UUID u1 = UUID.randomUUID();
if (4 != u1.version()) {
throw new Exception("bad version");
}
if (2 != u1.variant()) {
throw new Exception("bad variant");
}
if (list.contains(u1))
throw new Exception("random UUID collision very unlikely");
list.add(u1);
}
}
private static void nameUUIDFromBytesTest() throws Exception {
Random byteSource = new Random();
byte[] someBytes = new byte[12];
List list = new LinkedList();
for (int i=0; i<100; i++) {
byteSource.nextBytes(someBytes);
UUID u1 = UUID.nameUUIDFromBytes(someBytes);
if (3 != u1.version()) {
throw new Exception("bad version");
}
if (2 != u1.variant()) {
throw new Exception("bad variant");
}
if (list.contains(u1))
throw new Exception("byte UUID collision very unlikely");
list.add(u1);
}
}
private static void stringTest() throws Exception {
for (int i=0; i<100; i++) {
UUID u1 = UUID.randomUUID();
UUID u2 = UUID.fromString(u1.toString());
if (!u1.equals(u2))
throw new Exception("UUID -> string -> UUID failed");
}
testFromStringError("-0");
testFromStringError("x");
testFromStringError("----");
testFromStringError("-0-0-0-0");
testFromStringError("0-0-0-0-");
testFromStringError("0-0-0-0-0-");
testFromStringError("0-0-0-0-x");
}
private static void testFromStringError(String str) {
try {
UUID test = UUID.fromString(str);
throw new RuntimeException("Should have thrown IAE");
} catch (IllegalArgumentException iae) {
// pass
}
}
private static void versionTest() throws Exception {
UUID test = UUID.randomUUID();
if (test.version() != 4)
throw new Exception("randomUUID not type 4");
Random byteSource = new Random();
byte[] someBytes = new byte[12];
byteSource.nextBytes(someBytes);
test = UUID.nameUUIDFromBytes(someBytes);
if (test.version() != 3)
throw new Exception("nameUUIDFromBytes not type 3");
test = UUID.fromString("9835451d-e2e0-1e41-8a5a-be785f17dcda");
if (test.version() != 1)
throw new Exception("wrong version fromString 1");
test = UUID.fromString("9835451d-e2e0-2e41-8a5a-be785f17dcda");
if (test.version() != 2)
throw new Exception("wrong version fromString 2");
test = UUID.fromString("9835451d-e2e0-3e41-8a5a-be785f17dcda");
if (test.version() != 3)
throw new Exception("wrong version fromString 3");
test = UUID.fromString("9835451d-e2e0-4e41-8a5a-be785f17dcda");
if (test.version() != 4)
throw new Exception("wrong version fromString 4");
test = new UUID(0x0000000000001000L, 55L);
if (test.version() != 1)
throw new Exception("wrong version from bit set to 1");
test = new UUID(0x0000000000002000L, 55L);
if (test.version() != 2)
throw new Exception("wrong version from bit set to 2");
test = new UUID(0x0000000000003000L, 55L);
if (test.version() != 3)
throw new Exception("wrong version from bit set to 3");
test = new UUID(0x0000000000004000L, 55L);
if (test.version() != 4)
throw new Exception("wrong version from bit set to 4");
}
private static void variantTest() throws Exception {
UUID test = UUID.randomUUID();
if (test.variant() != 2)
throw new Exception("randomUUID not variant 2");
Random byteSource = new Random();
byte[] someBytes = new byte[12];
byteSource.nextBytes(someBytes);
test = UUID.nameUUIDFromBytes(someBytes);
if (test.variant() != 2)
throw new Exception("nameUUIDFromBytes not variant 2");
test = new UUID(55L, 0x0000000000001000L);
if (test.variant() != 0)
throw new Exception("wrong variant from bit set to 0");
test = new UUID(55L, 0x8000000000001000L);
if (test.variant() != 2)
throw new Exception("wrong variant from bit set to 2");
test = new UUID(55L, 0xc000000000001000L);
if (test.variant() != 6)
throw new Exception("wrong variant from bit set to 6");
test = new UUID(55L, 0xe000000000001000L);
if (test.variant() != 7)
throw new Exception("wrong variant from bit set to 7");
}
private static void timestampTest() throws Exception {
UUID test = UUID.randomUUID();
try {
test.timestamp();
throw new Exception("Expected exception not thrown");
} catch (UnsupportedOperationException uoe) {
// Correct result
}
test = UUID.fromString("00000001-0000-1000-8a5a-be785f17dcda");
if (test.timestamp() != 1)
throw new Exception("Incorrect timestamp");
test = UUID.fromString("00000400-0000-1000-8a5a-be785f17dcda");
if (test.timestamp() != 1024)
throw new Exception("Incorrect timestamp");
test = UUID.fromString("FFFFFFFF-FFFF-1FFF-8a5a-be785f17dcda");
if (test.timestamp() != Long.MAX_VALUE>>3)
throw new Exception("Incorrect timestamp");
}
private static void clockSequenceTest() throws Exception {
UUID test = UUID.randomUUID();
try {
test.clockSequence();
throw new Exception("Expected exception not thrown");
} catch (UnsupportedOperationException uoe) {
// Correct result
}
test = UUID.fromString("00000001-0000-1000-8001-be785f17dcda");
if (test.clockSequence() != 1)
throw new Exception("Incorrect sequence");
test = UUID.fromString("00000001-0000-1000-8002-be785f17dcda");
if (test.clockSequence() != 2)
throw new Exception("Incorrect sequence");
test = UUID.fromString("00000001-0000-1000-8010-be785f17dcda");
if (test.clockSequence() != 16)
throw new Exception("Incorrect sequence");
test = UUID.fromString("00000001-0000-1000-bFFF-be785f17dcda");
if (test.clockSequence() != ((2L<<13)-1)) // 2^14 - 1
throw new Exception("Incorrect sequence");
}
private static void nodeTest() throws Exception {
UUID test = UUID.randomUUID();
try {
test.node();
throw new Exception("Expected exception not thrown");
} catch (UnsupportedOperationException uoe) {
// Correct result
}
test = UUID.fromString("00000001-0000-1000-8001-000000000001");
if (test.node() != 1)
throw new Exception("Incorrect node");
test = UUID.fromString("00000001-0000-1000-8002-FFFFFFFFFFFF");
if (test.node() != ((2L<<47)-1)) // 2^48 - 1
throw new Exception("Incorrect node");
}
private static void hashCodeEqualsTest() throws Exception {
// If two UUIDs are equal they must have the same hashCode
for (int i=0; i<100; i++) {
UUID u1 = UUID.randomUUID();
UUID u2 = UUID.fromString(u1.toString());
if (u1.hashCode() != u2.hashCode())
throw new Exception("Equal UUIDs with different hashcodes");
}
// Test equality of UUIDs with tampered bits
for (int i=0; i<1000; i++) {
long l = generator.nextLong();
long l2 = generator.nextLong();
int position = generator.nextInt(64);
UUID u1 = new UUID(l, l2);
l = l ^ (1L << position);
UUID u2 = new UUID(l, l2);
if (u1.equals(u2))
throw new Exception("UUIDs with different bits equal");
}
}
private static void compareTo() throws Exception {
UUID id = new UUID(33L, 63L);
UUID id2 = new UUID(34L, 62L);
UUID id3 = new UUID(34L, 63L);
UUID id4 = new UUID(34L, 64L);
UUID id5 = new UUID(35L, 63L);
if ((id.compareTo(id2) >= 0) ||
(id2.compareTo(id3) >= 0) ||
(id3.compareTo(id4) >= 0) ||
(id4.compareTo(id5) >= 0))
throw new RuntimeException("compareTo failure");
if ((id5.compareTo(id4) <= 0) ||
(id4.compareTo(id3) <= 0) ||
(id3.compareTo(id2) <= 0) ||
(id2.compareTo(id) <= 0))
throw new RuntimeException("compareTo failure");
if (id.compareTo(id) != 0)
throw new RuntimeException("compareTo failure");
}
}
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