| /* |
| * 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; |
| } |
| } |