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  import static org.junit.jupiter.api.Assertions.*;
17  import org.junit.jupiter.api.Test;
18  
19  public class LRUMessageCacheTest {
20  
21      @Test
22      public void testEldestEntriesRemoval() {
23          final LRUMessageCache cache = new LRUMessageCache(2);
24          assertEquals(0, cache.getMessageCountAndThenIncrement("0"));
25          assertEquals(1, cache.getMessageCountAndThenIncrement("0"));
26          assertEquals(0, cache.getMessageCountAndThenIncrement("1"));
27          assertEquals(1, cache.getMessageCountAndThenIncrement("1"));
28          // 0 entry should have been removed.
29          assertEquals(0, cache.getMessageCountAndThenIncrement("2"));
30          // So it is expected a returned value of 0 instead of 2.
31          // 1 entry should have been removed.
32          assertEquals(0, cache.getMessageCountAndThenIncrement("0"));
33          // So it is expected a returned value of 0 instead of 2.
34          // 2 entry should have been removed.
35          assertEquals(0, cache.getMessageCountAndThenIncrement("1"));
36          // So it is expected a returned value of 0 instead of 2.
37          assertEquals(0, cache.getMessageCountAndThenIncrement("2"));
38      }
39  
40  }