content: /*
   * Licensed to the Apache Software Foundation (ASF) under one or more
   * contributor license agreements. See the NOTICE file distributed with
   * this work for additional information regarding copyright ownership.
   * The ASF licenses this file to You under the Apache License, Version 2.0
   * (the "License"); you may not use this file except in compliance with
   * the License. You may obtain a copy of the License at
   *
   *     http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  package org.apache.activemq.artemis.tests.unit.util;
  
  import java.util.HashSet;
  import java.util.Set;
  import java.util.UUID;
  
  import org.apache.activemq.artemis.tests.util.ActiveMQTestBase;
  import org.apache.activemq.artemis.utils.UUIDGenerator;
  import org.junit.jupiter.api.Test;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  import static org.junit.jupiter.api.Assertions.assertNotNull;
  import static org.junit.jupiter.api.Assertions.assertNull;
  
  public class UUIDGeneratorTest extends ActiveMQTestBase {
  
  
  
     @Test
     public void testFromJavaUUID() throws Exception {
        UUID javaId = UUID.randomUUID();
        UUIDGenerator gen = UUIDGenerator.getInstance();
        org.apache.activemq.artemis.utils.UUID nativeId = gen.fromJavaUUID(javaId);
        assertEquals(javaId.toString(), nativeId.toString());
     }
  
  
     @Test
     public void testDifferentInTightLoop() throws Exception {
        UUIDGenerator gen = UUIDGenerator.getInstance();
  
        final int numIterations = 10000;
        Set<org.apache.activemq.artemis.utils.UUID> uuidSet = new HashSet<>();
        for (int i = 0; i < numIterations; i++) {
           org.apache.activemq.artemis.utils.UUID nativeId = gen.generateUUID();
           uuidSet.add(nativeId);
        }
        assertEquals(numIterations, uuidSet.size(), "All there");
     }
  
     @Test
     public void testGetHardwareAddress() throws Exception {
        byte[] bytes = UUIDGenerator.getHardwareAddress();
        assertNotNull(bytes);
        assertEquals(6, bytes.length);
     }
  
     @Test
     public void testZeroPaddedBytes() throws Exception {
        assertNull(UUIDGenerator.getZeroPaddedSixBytes(null));
        assertNull(UUIDGenerator.getZeroPaddedSixBytes(new byte[0]));
        assertNull(UUIDGenerator.getZeroPaddedSixBytes(new byte[7]));
  
        byte[] fiveBytes = new byte[]{1, 2, 3, 4, 5};
        byte[] zeroPaddedFiveBytes = UUIDGenerator.getZeroPaddedSixBytes(fiveBytes);
        ActiveMQTestBase.assertEqualsByteArrays(new byte[]{1, 2, 3, 4, 5, 0}, zeroPaddedFiveBytes);
  
        byte[] fourBytes = new byte[]{1, 2, 3, 4};
        byte[] zeroPaddedFourBytes = UUIDGenerator.getZeroPaddedSixBytes(fourBytes);
        ActiveMQTestBase.assertEqualsByteArrays(new byte[]{1, 2, 3, 4, 0, 0}, zeroPaddedFourBytes);
  
        byte[] threeBytes = new byte[]{1, 2, 3};
        byte[] zeroPaddedThreeBytes = UUIDGenerator.getZeroPaddedSixBytes(threeBytes);
        ActiveMQTestBase.assertEqualsByteArrays(new byte[]{1, 2, 3, 0, 0, 0}, zeroPaddedThreeBytes);
     }
  
  
  }
  