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/*
* Bitronix Transaction Manager
*
* Copyright (c) 2010, Bitronix Software.
*
* This copyrighted material is made available to anyone wishing to use, modify,
* copy, or redistribute it subject to the terms and conditions of the GNU
* Lesser General Public License, as published by the Free Software Foundation.
*
* This program 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 Lesser General Public License
* for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this distribution; if not, write to:
* Free Software Foundation, Inc.
* 51 Franklin Street, Fifth Floor
* Boston, MA 02110-1301 USA
*/
package bitronix.tm.utils;
import junit.framework.TestCase;
import java.util.Arrays;
import java.util.HashSet;
/**
*
* @author lorban
*/
public class UidGeneratorTest extends TestCase {
public void testHexaStringEncoder() throws Exception {
byte[] result = Encoder.intToBytes(0x80);
String hexString = new Uid(result).toString();
assertEquals("00000080", hexString);
result = Encoder.longToBytes(0x81);
hexString = new Uid(result).toString();
assertEquals("0000000000000081", hexString);
result = Encoder.shortToBytes((short)0xff);
hexString = new Uid(result).toString();
assertEquals("00FF", hexString);
}
public void testUniqueness() throws Exception {
final int count = 10000;
HashSet uids = new HashSet(2048);
for (int i=0; i<count ;i++) {
Uid uid = UidGenerator.generateUid();
assertTrue("UidGenerator generated duplicate UID at #" + i, uids.add(uid.toString()));
}
}
public void testEquals() throws Exception {
Uid uid1 = UidGenerator.generateUid();
Uid uid2 = UidGenerator.generateUid();
Uid uid3 = null;
assertFalse(uid1.equals(uid2));
assertFalse(uid2.equals(uid3));
assertTrue(uid2.equals(uid2));
}
public void testExtracts() throws Exception {
byte[] timestamp = Encoder.longToBytes(System.currentTimeMillis());
byte[] sequence = Encoder.intToBytes(1);
byte[] serverId = "my-server-id".getBytes();
int uidLength = serverId.length + timestamp.length + sequence.length;
byte[] uidArray = new byte[uidLength];
System.arraycopy(serverId, 0, uidArray, 0, serverId.length);
System.arraycopy(timestamp, 0, uidArray, serverId.length, timestamp.length);
System.arraycopy(sequence, 0, uidArray, serverId.length + timestamp.length, sequence.length);
Uid uid = new Uid(uidArray);
assertTrue(Arrays.equals(serverId, uid.extractServerId()));
assertEquals(Encoder.bytesToLong(timestamp, 0), uid.extractTimestamp());
assertEquals(Encoder.bytesToInt(sequence, 0), uid.extractSequence());
}
}
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