1 /*Copyright (C) 2014 Red Hat, Inc.
2 
3 This file is part of IcedTea.
4 
5 IcedTea is free software; you can redistribute it and/or
6 modify it under the terms of the GNU General Public License as published by
7 the Free Software Foundation, version 2.
8 
9 IcedTea is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
12 General Public License for more details.
13 
14 You should have received a copy of the GNU General Public License
15 along with IcedTea; see the file COPYING.  If not, write to
16 the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
17 02110-1301 USA.
18 
19 Linking this library statically or dynamically with other modules is
20 making a combined work based on this library.  Thus, the terms and
21 conditions of the GNU General Public License cover the whole
22 combination.
23 
24 As a special exception, the copyright holders of this library give you
25 permission to link this library with independent modules to produce an
26 executable, regardless of the license terms of these independent
27 modules, and to copy and distribute the resulting executable under
28 terms of your choice, provided that you also meet, for each linked
29 independent module, the terms and conditions of the license of that
30 module.  An independent module is a module which is not derived from
31 or based on this library.  If you modify this library, you may extend
32 this exception to your version of the library, but you are not
33 obligated to do so.  If you do not wish to do so, delete this
34 exception statement from your version.
35  */
36 
37 package net.sourceforge.jnlp.util;
38 
39 import static org.junit.Assert.assertFalse;
40 import static org.junit.Assert.assertTrue;
41 
42 import java.io.File;
43 import java.io.FileNotFoundException;
44 import java.util.Arrays;
45 
46 import org.junit.After;
47 import org.junit.Before;
48 import org.junit.Test;
49 
50 public class MD5SumWatcherTest {
51 
52     private File file;
53     private MD5SumWatcher watcher;
54 
55     @Before
createNewFile()56     public void createNewFile() throws Exception {
57         file = File.createTempFile("md5sumwatchertest", "tmp");
58         file.deleteOnExit();
59         watcher = new MD5SumWatcher(file);
60     }
61 
62     @After
deleteTempFile()63     public void deleteTempFile() throws Exception {
64         if (file.exists()) {
65             file.delete();
66         }
67     }
68 
69     @Test
testNonExistentFile()70     public void testNonExistentFile() {
71         file.delete();
72         file.mkdirs();
73         watcher = new MD5SumWatcher(file);
74         boolean gotException = false;
75         try {
76             watcher.update();
77         } catch (final Exception e) {
78             gotException = true;
79             assertTrue("Should have received FileNotFoundException", e instanceof FileNotFoundException);
80         }
81         assertTrue("Should have received FileNotFoundException", gotException);
82     }
83 
84     @Test
testNoFileChangeGivesSameMd5()85     public void testNoFileChangeGivesSameMd5() throws Exception {
86         byte[] sum = watcher.getSum();
87         byte[] sum2 = watcher.getSum();
88         assertTrue("MD5 sums should be the same. first: " + Arrays.toString(sum) + ", second: " + Arrays.toString(sum2),
89                 Arrays.equals(sum, sum2));
90     }
91 
92     @Test
testSavingToFileChangesMd5()93     public void testSavingToFileChangesMd5() throws Exception {
94         byte[] original = watcher.getSum();
95         FileUtils.saveFile("some test content\n", file);
96         byte[] changed = watcher.getSum();
97         assertFalse("MD5 sum should have changed, but was constant as " + Arrays.toString(original),
98                 Arrays.equals(original, changed));
99     }
100 
101     @Test
testUnchangedContentUpdate()102     public void testUnchangedContentUpdate() throws Exception {
103         assertFalse("update() should return false", watcher.update());
104     }
105 
106     @Test
testChangedContentUpdate()107     public void testChangedContentUpdate() throws Exception {
108         FileUtils.saveFile("some test content\n", file);
109         final boolean changed = watcher.update();
110         assertTrue("update() should return true", changed);
111     }
112 
113 }
114