test/java/util/UUID/UUIDTest.java - toolchain/jdk/jdk9_jdk - Git at Google

 /*
  * 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");

     }

 }
	/*
	* 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");

	}

	}