1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
|
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.apache.commons.compress.compressors.bzip2;
import static org.junit.Assert.assertArrayEquals;
import java.io.BufferedInputStream;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.nio.ByteBuffer;
import java.nio.channels.Channels;
import java.nio.channels.ReadableByteChannel;
import org.junit.After;
import org.junit.Assert;
import org.junit.Before;
import org.junit.BeforeClass;
import org.junit.Test;
/**
* Testcase porting a test from Python's testsuite.
* @see "https://issues.apache.org/jira/browse/COMPRESS-253"
*/
public class PythonTruncatedBzip2Test {
private static String TEXT = "root:x:0:0:root:/root:/bin/bash\nbin:x:1:1:bin:/bin:\ndaemon:x:2:2:daemon:/sbin:\nadm:x:3:4:adm:/var/adm:\nlp:x:4:7:lp:/var/spool/lpd:\nsync:x:5:0:sync:/sbin:/bin/sync\nshutdown:x:6:0:shutdown:/sbin:/sbin/shutdown\nhalt:x:7:0:halt:/sbin:/sbin/halt\nmail:x:8:12:mail:/var/spool/mail:\nnews:x:9:13:news:/var/spool/news:\nuucp:x:10:14:uucp:/var/spool/uucp:\noperator:x:11:0:operator:/root:\ngames:x:12:100:games:/usr/games:\ngopher:x:13:30:gopher:/usr/lib/gopher-data:\nftp:x:14:50:FTP User:/var/ftp:/bin/bash\nnobody:x:65534:65534:Nobody:/home:\npostfix:x:100:101:postfix:/var/spool/postfix:\nniemeyer:x:500:500::/home/niemeyer:/bin/bash\npostgres:x:101:102:PostgreSQL Server:/var/lib/pgsql:/bin/bash\nmysql:x:102:103:MySQL server:/var/lib/mysql:/bin/bash\nwww:x:103:104::/var/www:/bin/false\n";
private static byte[] DATA;
private static byte[] TRUNCATED_DATA;
private ReadableByteChannel bz2Channel;
@BeforeClass
public static void initializeTestData() throws IOException {
final ByteArrayOutputStream out = new ByteArrayOutputStream();
final BZip2CompressorOutputStream bz2out = new BZip2CompressorOutputStream(out);
bz2out.write(TEXT.getBytes(), 0, TEXT.getBytes().length);
bz2out.close();
DATA = out.toByteArray();
// Drop the eos_magic field (6 bytes) and CRC (4 bytes).
TRUNCATED_DATA = copyOfRange(DATA, 0, DATA.length - 10);
}
@Before
public void initializeChannel() throws IOException {
final InputStream source = new ByteArrayInputStream(TRUNCATED_DATA);
this.bz2Channel = makeBZ2C(source);
}
@After
public void closeChannel() throws IOException {
bz2Channel.close();
bz2Channel = null;
}
@Test(expected = IOException.class)
public void testTruncatedData() throws IOException {
//with BZ2File(self.filename) as f:
// self.assertRaises(EOFError, f.read)
System.out.println("Attempt to read the whole thing in, should throw ...");
final ByteBuffer buffer = ByteBuffer.allocate(8192);
bz2Channel.read(buffer);
}
@Test
public void testPartialReadTruncatedData() throws IOException {
//with BZ2File(self.filename) as f:
// self.assertEqual(f.read(len(self.TEXT)), self.TEXT)
// self.assertRaises(EOFError, f.read, 1)
final int length = TEXT.length();
ByteBuffer buffer = ByteBuffer.allocate(length);
bz2Channel.read(buffer);
assertArrayEquals(copyOfRange(TEXT.getBytes(), 0, length),
buffer.array());
// subsequent read should throw
buffer = ByteBuffer.allocate(1);
try {
bz2Channel.read(buffer);
Assert.fail("The read should have thrown.");
} catch (final IOException e) {
// pass
}
}
private static ReadableByteChannel makeBZ2C(final InputStream source) throws IOException {
final BufferedInputStream bin = new BufferedInputStream(source);
final BZip2CompressorInputStream bZin = new BZip2CompressorInputStream(bin, true);
return Channels.newChannel(bZin);
}
// Helper method since Arrays#copyOfRange is Java 1.6+
// Does not check parameters, so may fail if they are incompatible
private static byte[] copyOfRange(final byte[] original, final int from, final int to) {
final int length = to - from;
final byte buff[] = new byte[length];
System.arraycopy(original, from, buff, 0, length);
return buff;
}
}
|
