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1   /**
2    * Logback: the reliable, generic, fast and flexible logging framework.
3    * Copyright (C) 1999-2015, QOS.ch. All rights reserved.
4    *
5    * This program and the accompanying materials are dual-licensed under
6    * either the terms of the Eclipse Public License v1.0 as published by
7    * the Eclipse Foundation
8    *
9    *   or (per the licensee's choosing)
10   *
11   * under the terms of the GNU Lesser General Public License version 2.1
12   * as published by the Free Software Foundation.
13   */
14  package ch.qos.logback.classic.turbo;
15  
16  
17  
18  import static org.junit.Assert.assertEquals;
19  
20  import org.junit.Test;
21  
22  public class LRUMessageCacheTest {
23  
24      @Test
25      public void testEldestEntriesRemoval() {
26          final LRUMessageCache cache = new LRUMessageCache(2);
27          assertEquals(0, cache.getMessageCountAndThenIncrement("0"));
28          assertEquals(1, cache.getMessageCountAndThenIncrement("0"));
29          assertEquals(0, cache.getMessageCountAndThenIncrement("1"));
30          assertEquals(1, cache.getMessageCountAndThenIncrement("1"));
31          // 0 entry should have been removed.
32          assertEquals(0, cache.getMessageCountAndThenIncrement("2"));
33          // So it is expected a returned value of 0 instead of 2.
34          // 1 entry should have been removed.
35          assertEquals(0, cache.getMessageCountAndThenIncrement("0"));
36          // So it is expected a returned value of 0 instead of 2.
37          // 2 entry should have been removed.
38          assertEquals(0, cache.getMessageCountAndThenIncrement("1"));
39          // So it is expected a returned value of 0 instead of 2.
40          assertEquals(0, cache.getMessageCountAndThenIncrement("2"));
41      }
42  
43  }