/*
* $Id$
*
* Copyright (C) 2003-2014 JNode.org
*
* This library is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published
* by the Free Software Foundation; either version 2.1 of the License, or
* (at your option) any later version.
*
* This library is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
* License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this library; If not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
package org.jnode.test.fs.ntfs;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.util.Arrays;
import junit.framework.TestCase;
import org.jnode.driver.Device;
import org.jnode.driver.block.FileDevice;
import org.jnode.fs.FSDirectory;
import org.jnode.fs.FSFile;
import org.jnode.fs.FileSystem;
import org.jnode.fs.FileSystemException;
import org.jnode.fs.ntfs.NTFSFileSystemType;
/**
* Unit tests to ensure sanity of Jnode's NTFS implementation.
*
* @author Daniel Noll (daniel@nuix.com.au)
*/
public class NTFSUnitTest extends TestCase {
private String TEST_IMAGE_PATH = System.getProperty("user.home");
private String TEST_IMAGE_FILENAME_2 = TEST_IMAGE_PATH + "/ntfs-sparse-files.001";
private String TEST_IMAGE_FILENAME_1 = TEST_IMAGE_PATH + "/ntfs-extreme-fragmentation.001";
/**
* Run tests invocation method.
* @param args
*/
/*public static void main(String[] args){
junit.textui.TestRunner.run(NTFSUnitTest.class);
}*/
/**
* <p>Tests handling of extreme fragmentation, which results in attribute lists being
* split among multiple MFT records.</p>
* <p/>
* <p>The image was created by writing 120 small files, and then creating a big file.
* Then each small file was deleted individually and randomly. After each deletion,
* the size of the big file was grown by 1MB. Eventually this results in a single
* 120MB file fragmented into up to 120 chunks (depending on the random numbers.)</p>
*
* @throws Exception if an error occurs.
*/
public void testExtremeFragmentation() {
System.out.println("NTFS : Test extreme fragmentation (" + TEST_IMAGE_FILENAME_1 + ").");
try {
File file = new File(TEST_IMAGE_FILENAME_1);
Device device = new FileDevice(file, "r");
FileSystem<?> fileSystem = new NTFSFileSystemType().create(device, true);
FSDirectory root = fileSystem.getRootEntry().getDirectory();
// Check the big file. Every byte should be readable as zero, hopefully.
FSFile bigFile = root.getEntry("bigfile.dat").getFile();
int increment = 1024 * 1024;
assertEquals("Wrong file length for big file", 120 * increment, bigFile.getLength());
byte[] actual = new byte[increment];
for (int i = 0; i < 120 * increment; i += increment) {
bigFile.read(i, ByteBuffer.wrap(actual));
}
fileSystem.close();
} catch (FileNotFoundException e) {
fail("Unexpected exception : " + e.getMessage());
} catch (IOException e) {
fail("Unexpected exception : " + e.getMessage());
} catch (FileSystemException e) {
fail("Unexpected exception : " + e.getMessage());
}
}
/**
* <p>Tests sparse file handling.</p>
* <p/>
* <p>FWIW, the files were created like this on Windows XP:</p>
* <pre>
* fsutil file createnew E:\sparsefile1.dat 10240
* fsutil sparse setflag E:\sparsefile1.dat
* fsutil file setzerodata offset=0 length=10240 E:\sparsefile1.dat
* </pre>
* <p/>
* <p>The data written into the first file was done from Java and a RandomAccessFile.</p>
*
* @throws Exception if an error occurs.
*/
public void testSparseFiles() {
System.out.println("NTFS : Test sparse file (" + TEST_IMAGE_FILENAME_2 + ").");
try {
File file = new File(TEST_IMAGE_FILENAME_2);
Device device = new FileDevice(file, "r");
FileSystem<?> fileSystem = new NTFSFileSystemType().create(device, true);
FSDirectory root = fileSystem.getRootEntry().getDirectory();
// The first file has 256 bytes of real data at the front, and the rest is sparse.
byte[] expectedContents = new byte[10240];
for (int i = 0; i < 256; i++) {
expectedContents[i] = (byte) i;
}
FSFile sparseFile1 = root.getEntry("sparsefile1.dat").getFile();
assertEquals("Wrong length for sparse file 2", expectedContents.length, sparseFile1.getLength());
byte[] actualContents = new byte[expectedContents.length];
sparseFile1.read(0, ByteBuffer.wrap(actualContents));
Arrays.fill(actualContents, 256, 4096, (byte) 0); // slack space contains garbage, so wipe it.
assertEquals("Wrong contents for sparse file 1", expectedContents, actualContents);
// The second file is 100% sparse.
expectedContents = new byte[10240];
FSFile sparseFile2 = root.getEntry("sparsefile2.dat").getFile();
assertEquals("Wrong length for sparse file 2", expectedContents.length, sparseFile2.getLength());
actualContents = new byte[expectedContents.length];
sparseFile2.read(0, ByteBuffer.wrap(actualContents));
assertEquals("Wrong contents for sparse file 2", expectedContents, actualContents);
fileSystem.close();
} catch (FileNotFoundException e) {
fail("Unexpected exception : " + e.getMessage());
} catch (IOException e) {
fail("Unexpected exception : " + e.getMessage());
} catch (FileSystemException e) {
fail("Unexpected exception : " + e.getMessage());
}
}
}