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1   /*
2    * $Id: UUIDTestCase.java 20773 2010-12-16 07:05:53Z dirk.olmes $
3    * --------------------------------------------------------------------------------------
4    * Copyright (c) MuleSoft, Inc.  All rights reserved.  http://www.mulesoft.com
5    *
6    * The software in this package is published under the terms of the CPAL v1.0
7    * license, a copy of which has been included with this distribution in the
8    * LICENSE.txt file.
9    */
10  
11  package org.mule.util;
12  
13  import org.mule.tck.AbstractMuleTestCase;
14  
15  import java.util.ArrayList;
16  import java.util.Collections;
17  import java.util.Comparator;
18  import java.util.HashSet;
19  import java.util.List;
20  import java.util.Set;
21  
22  
23  public class UUIDTestCase extends AbstractMuleTestCase
24  {
25  
26      public void testGenerateUniqueAndIncrementalIds() throws Exception
27      {
28          final Set<String> ids = new HashSet<String>();
29          final List<Object[]> idsWithIndexes = new ArrayList<Object[]>(1000);
30          final int numberOfIdsToGenerate = 10000;
31          for (int index = 0; index < numberOfIdsToGenerate; index++)
32          {
33              String generatedId = UUID.getUUID();
34              idsWithIndexes.add(new Object[]{generatedId, Integer.valueOf(index)});
35              if (ids.contains(generatedId))
36              {
37                  fail("REPEATED ID :" + index + ": " + generatedId);
38              }
39              else
40              {
41                  ids.add(generatedId);
42              }
43          }
44          final Comparator<Object[]> comparatorById = new Comparator<Object[]>()
45          {
46              public int compare(Object[] o1, Object[] o2)
47              {
48                  return ((String) o1[0]).compareTo((String) o2[0]);
49              }
50          };
51          Collections.sort(idsWithIndexes, comparatorById);
52          for (int index = 0; index < numberOfIdsToGenerate; index++)
53          {
54              assertEquals(Integer.valueOf(index), idsWithIndexes.get(index)[1]);
55          }
56      }
57  
58  }
59  
60