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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.core.encoder;
15  
16  import static org.junit.Assert.*;
17  
18  import java.util.Random;
19  
20  import org.junit.Test;
21  
22  public class ByteArrayUtilTest {
23  
24      int BA_SIZE = 16;
25      byte[] byteArray = new byte[BA_SIZE];
26  
27      Random random = new Random(18532235);
28  
29      @Test
30      public void smoke() {
31          verifyLoop(byteArray, 0, 0);
32          verifyLoop(byteArray, 0, 10);
33          verifyLoop(byteArray, 0, Integer.MAX_VALUE);
34          verifyLoop(byteArray, 0, Integer.MIN_VALUE);
35      }
36  
37      @Test
38      public void random() {
39          for (int i = 0; i < 100000; i++) {
40              int rOffset = random.nextInt(BA_SIZE - 4);
41              int rInt = random.nextInt();
42              verifyLoop(byteArray, rOffset, rInt);
43          }
44      }
45  
46      void verifyLoop(byte[] ba, int offset, int expected) {
47          ByteArrayUtil.writeInt(byteArray, offset, expected);
48          int back = ByteArrayUtil.readInt(byteArray, offset);
49          assertEquals(expected, back);
50  
51      }
52  
53  }