|
1
21 package net.sourceforge.cobertura.util;
22
23 import java.io.ByteArrayInputStream  ;
24 import java.io.ByteArrayOutputStream ;
25 import java.io.File ;
26 import java.io.FileInputStream ;
27 import java.io.FileOutputStream ;
28 import java.io.IOException ;
29 import java.io.InputStream ;
30 import java.io.OutputStream ;
31
32 import junit.framework.TestCase;
33
34
37 public class IOUtilTest extends TestCase
38 {
39
40 private static final byte[] emptyByteArray = new byte[] {};
41
42 private static final byte[] singletonByteArray = new byte[] { 7 };
43
44 private static final byte[] smallByteArray = new byte[] { 1, 0, 2, -128,
45 127 };
46
47 private File createFileWithData(byte[] data) throws IOException
48 {
49 File file = File.createTempFile("IOUtilTest", ".txt");
50 file.deleteOnExit();
51 OutputStream src = new FileOutputStream (file);
52 src.write(data);
53 src.close();
54 return file;
55 }
56
57 public void testMoveFile() throws IOException
58 {
59 File srcFile = createFileWithData(smallByteArray);
61 File destFile = createFileWithData(emptyByteArray);
62 destFile.delete();
63 assertTrue(!destFile.isFile());
64 IOUtil.moveFile(srcFile, destFile);
65 assertTrue(destFile.isFile());
66 InputStream in = new FileInputStream (destFile);
67 for (int i = 0; i < smallByteArray.length; i++)
68 assertEquals(smallByteArray[i], (byte)in.read());
69 assertEquals(-1, in.read());
70 in.close();
71
72 srcFile = createFileWithData(singletonByteArray);
74 destFile = createFileWithData(smallByteArray);
75 IOUtil.moveFile(srcFile, destFile);
76 assertTrue(destFile.isFile());
77 in = new FileInputStream (destFile);
78 for (int i = 0; i < singletonByteArray.length; i++)
79 assertEquals(singletonByteArray[i], (byte)in.read());
80 assertEquals(-1, in.read());
81 in.close();
82
83 srcFile = createFileWithData(smallByteArray);
85 try
86 {
87 IOUtil.moveFile(srcFile, null);
88 fail("Expected NullPointerException");
89 }
90 catch (NullPointerException ex)
91 {
92 }
93
94 destFile = createFileWithData(smallByteArray);
95 try
96 {
97 IOUtil.moveFile(null, destFile);
98 fail("Expected NullPointerException");
99 }
100 catch (NullPointerException ex)
101 {
102 }
103 }
104
105 public void testCopyStream() throws IOException
106 {
107 ByteArrayInputStream in = new ByteArrayInputStream (smallByteArray);
108 ByteArrayOutputStream out = new ByteArrayOutputStream ();
109 IOUtil.copyStream(in, out);
110 assertEquals(smallByteArray, out.toByteArray());
111
112 in = new ByteArrayInputStream (singletonByteArray);
113 out = new ByteArrayOutputStream ();
114 IOUtil.copyStream(in, out);
115 assertEquals(singletonByteArray, out.toByteArray());
116
117 in = new ByteArrayInputStream (emptyByteArray);
118 out = new ByteArrayOutputStream ();
119 IOUtil.copyStream(in, out);
120 assertEquals(emptyByteArray, out.toByteArray());
121
122 byte[] bigArray = generateBigByteArray();
123 in = new ByteArrayInputStream (bigArray);
124 out = new ByteArrayOutputStream ();
125 IOUtil.copyStream(in, out);
126 assertEquals(bigArray, out.toByteArray());
127
128 try
129 {
130 IOUtil.copyStream(null, new ByteArrayOutputStream ());
131 fail("NullPointerException expected");
132 }
133 catch (NullPointerException ex)
134 {
135 }
136
137 try
138 {
139 IOUtil.copyStream(new ByteArrayInputStream (bigArray), null);
140 fail("NullPointerException expected");
141 }
142 catch (NullPointerException ex)
143 {
144 }
145 }
146
147 public void testFillByteArrayFromInputStream() throws IOException
148 {
149 byte[] out = IOUtil
150 .createByteArrayFromInputStream(new ByteArrayInputStream (
151 smallByteArray));
152 assertEquals(smallByteArray, out);
153
154 out = IOUtil.createByteArrayFromInputStream(new ByteArrayInputStream (
155 emptyByteArray));
156 assertEquals(emptyByteArray, out);
157
158 out = IOUtil.createByteArrayFromInputStream(new ByteArrayInputStream (
159 singletonByteArray));
160 assertEquals(singletonByteArray, out);
161
162 byte[] bigArray = generateBigByteArray();
163 out = IOUtil.createByteArrayFromInputStream(new ByteArrayInputStream (
164 bigArray));
165 assertEquals(bigArray, out);
166
167 try
168 {
169 IOUtil.createByteArrayFromInputStream(null);
170 fail("NullPointerException expected");
171 }
172 catch (NullPointerException ex)
173 {
174 }
175 }
176
177 private void assertEquals(byte[] first, byte[] second)
178 {
179 assertEquals(first.length, second.length);
180 for (int i = 0; i < first.length; i++)
181 {
182 assertEquals(first[i], second[i]);
183 }
184 }
185
186 private byte[] generateBigByteArray()
187 {
188 byte[] bigArray = new byte[1000000];
189 for (int i = 0; i < bigArray.length; i++)
190 {
191 bigArray[i] = (byte)i;
192 }
193 return bigArray;
194 }
195
196 }
197 |
Popular Tags |
Java API By Example, From Geeks To Geeks.