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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
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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
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package org.apache.poi.poifs.nio;
import junit.framework.TestCase;
import org.apache.poi.POIDataSamples;
import org.apache.poi.util.IOUtils;
import org.apache.poi.util.TempFile;
import java.io.*;
import java.nio.BufferUnderflowException;
import java.nio.ByteBuffer;
/**
* Tests for the datasource implementations
*/
public class TestDataSource extends TestCase
{
private static POIDataSamples data = POIDataSamples.getPOIFSInstance();
public void testFile() throws Exception {
File f = data.getFile("Notes.ole2");
FileBackedDataSource ds = new FileBackedDataSource(f);
try {
checkDataSource(ds, false);
} finally {
ds.close();
}
// try a second time
ds = new FileBackedDataSource(f);
try {
checkDataSource(ds, false);
} finally {
ds.close();
}
}
public void testFileWritable() throws Exception {
File temp = TempFile.createTempFile("TestDataSource", ".test");
try {
writeDataToFile(temp);
FileBackedDataSource ds = new FileBackedDataSource(temp, false);
try {
checkDataSource(ds, true);
} finally {
ds.close();
}
// try a second time
ds = new FileBackedDataSource(temp, false);
try {
checkDataSource(ds, true);
} finally {
ds.close();
}
writeDataToFile(temp);
} finally {
assertTrue(temp.exists());
assertTrue("Could not delete file " + temp, temp.delete());
}
}
public void testRewritableFile() throws Exception {
File temp = TempFile.createTempFile("TestDataSource", ".test");
try {
writeDataToFile(temp);
FileBackedDataSource ds = new FileBackedDataSource(temp, true);
try {
ByteBuffer buf = ds.read(0, 10);
assertNotNull(buf);
buf = ds.read(8, 0x400);
assertNotNull(buf);
} finally {
ds.close();
}
// try a second time
ds = new FileBackedDataSource(temp, true);
try {
ByteBuffer buf = ds.read(0, 10);
assertNotNull(buf);
buf = ds.read(8, 0x400);
assertNotNull(buf);
} finally {
ds.close();
}
writeDataToFile(temp);
} finally {
assertTrue(temp.exists());
assertTrue(temp.delete());
}
}
private void writeDataToFile(File temp) throws IOException {
OutputStream str = new FileOutputStream(temp);
try {
InputStream in = data.openResourceAsStream("Notes.ole2");
try {
IOUtils.copy(in, str);
} finally {
in.close();
}
} finally {
str.close();
}
}
private void checkDataSource(FileBackedDataSource ds, boolean writeable) throws IOException {
assertEquals(writeable, ds.isWriteable());
assertNotNull(ds.getChannel());
// rewriting changes the size
if(writeable) {
assertTrue("Had: " + ds.size(), ds.size() == 8192 || ds.size() == 8198);
} else {
assertEquals(8192, ds.size());
}
// Start of file
ByteBuffer bs;
bs = ds.read(4, 0);
assertEquals(4, bs.capacity());
assertEquals(0, bs.position());
assertEquals(0xd0 - 256, bs.get(0));
assertEquals(0xcf - 256, bs.get(1));
assertEquals(0x11, bs.get(2));
assertEquals(0xe0 - 256, bs.get(3));
assertEquals(0xd0 - 256, bs.get());
assertEquals(0xcf - 256, bs.get());
assertEquals(0x11, bs.get());
assertEquals(0xe0 - 256, bs.get());
// Mid way through
bs = ds.read(8, 0x400);
assertEquals(8, bs.capacity());
assertEquals(0, bs.position());
assertEquals((byte) 'R', bs.get(0));
assertEquals(0, bs.get(1));
assertEquals((byte) 'o', bs.get(2));
assertEquals(0, bs.get(3));
assertEquals((byte) 'o', bs.get(4));
assertEquals(0, bs.get(5));
assertEquals((byte) 't', bs.get(6));
assertEquals(0, bs.get(7));
// Can go to the end, but not past it
bs = ds.read(8, 8190);
assertEquals(0, bs.position()); // TODO How best to warn of a short read?
// Can't go off the end
try {
ds.read(4, 8192);
if(!writeable) {
fail("Shouldn't be able to read off the end of the file");
}
} catch (IndexOutOfBoundsException e) {
// expected here
}
}
public void testByteArray() throws Exception {
byte[] data = new byte[256];
byte b;
for(int i=0; i<data.length; i++) {
b = (byte)i;
data[i] = b;
}
ByteArrayBackedDataSource ds = new ByteArrayBackedDataSource(data);
// Start
ByteBuffer bs;
bs = ds.read(4, 0);
assertEquals(0, bs.position());
assertEquals(0x00, bs.get());
assertEquals(0x01, bs.get());
assertEquals(0x02, bs.get());
assertEquals(0x03, bs.get());
// Middle
bs = ds.read(4, 100);
assertEquals(100, bs.position());
assertEquals(100, bs.get());
assertEquals(101, bs.get());
assertEquals(102, bs.get());
assertEquals(103, bs.get());
// End
bs = ds.read(4, 252);
assertEquals(-4, bs.get());
assertEquals(-3, bs.get());
assertEquals(-2, bs.get());
assertEquals(-1, bs.get());
// Off the end
bs = ds.read(4, 254);
assertEquals(-2, bs.get());
assertEquals(-1, bs.get());
try {
bs.get();
fail("Shouldn't be able to read off the end");
} catch(BufferUnderflowException e) {
// expected here
}
// Past the end
try {
ds.read(4, 256);
fail("Shouldn't be able to read off the end");
} catch(IndexOutOfBoundsException e) {
// expected here
}
// Overwrite
bs = ByteBuffer.allocate(4);
bs.put(0, (byte)-55);
bs.put(1, (byte)-54);
bs.put(2, (byte)-53);
bs.put(3, (byte)-52);
assertEquals(256, ds.size());
ds.write(bs, 40);
assertEquals(256, ds.size());
bs = ds.read(4, 40);
assertEquals(-55, bs.get());
assertEquals(-54, bs.get());
assertEquals(-53, bs.get());
assertEquals(-52, bs.get());
// Append
bs = ByteBuffer.allocate(4);
bs.put(0, (byte)-55);
bs.put(1, (byte)-54);
bs.put(2, (byte)-53);
bs.put(3, (byte)-52);
assertEquals(256, ds.size());
ds.write(bs, 256);
assertEquals(260, ds.size());
bs = ds.read(4, 256);
assertEquals(256, bs.position());
assertEquals(-55, bs.get());
assertEquals(-54, bs.get());
assertEquals(-53, bs.get());
assertEquals(-52, bs.get());
}
}