| /* |
| * 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"); |
| |
| } |
| |
| } |