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/*
* Copyright (C) 2017-2022 Sebastiano Vigna
*
* Licensed 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 it.unimi.dsi.fastutil.io;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.FilterOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.nio.channels.FileChannel;
import java.util.Arrays;
import java.util.Random;
import org.junit.Test;
public class FastBufferedOutputStreamTest {
private static final boolean DEBUG = false;
@Test
public void testWriteEqualToBufferSize() throws IOException {
@SuppressWarnings("resource")
final FastBufferedOutputStream fbos = new FastBufferedOutputStream(new ByteArrayOutputStream(), 4);
fbos.write(0);
fbos.write(new byte[4]);
fbos.write(0);
}
public void testRandom(int bufSize) throws FileNotFoundException, IOException {
File file = File.createTempFile(getClass().getSimpleName(), "test");
file.deleteOnExit();
FastBufferedOutputStream fbos = new FastBufferedOutputStream(new FileOutputStream(file + "1"), bufSize);
FileOutputStream bos = new FileOutputStream(file + "2");
FileChannel fc = bos.getChannel();
Random r = new Random();
long pos, len;
int j = r.nextInt(10000);
while(j-- != 0) {
switch(r.nextInt(6)) {
case 0:
int x = (byte)r.nextInt();
fbos.write(x);
bos.write(x);
break;
case 1:
byte[] b = new byte[r.nextInt(32768) + 16];
for(int i = 0; i < b.length; i++) b[i] = (byte)r.nextInt();
int offset = r.nextInt(b.length / 4);
int length = r.nextInt(b.length - offset);
fbos.write(b, offset, length);
bos.write(b, offset, length);
break;
case 2:
fbos.flush();
break;
case 3:
if (DEBUG) System.err.println("position()");
pos = (int)fbos.position();
assertEquals((int)fc.position(), pos);
break;
case 4:
assertEquals(fc.size(), len = fbos.length());
pos = len != 0 ? r.nextInt((int)len) : 0;
fbos.position(pos);
fc.position(pos);
if (DEBUG) System.err.println("position(" + pos + ")");
break;
}
}
fbos.close();
bos.close();
assertTrue(Arrays.equals(BinIO.loadBytes(file + "1"), BinIO.loadBytes(file + "2")));
}
@Test
public void testRandom() throws FileNotFoundException, IOException {
testRandom(1);
testRandom(2);
testRandom(3);
testRandom(1024);
}
@Test
public void testCloseOutputBeforeBufferedStream() throws IOException {
NonWritableAfterClose os = new NonWritableAfterClose(new ByteArrayOutputStream());
final FastBufferedOutputStream fbos = new FastBufferedOutputStream(os);
os.close();
fbos.close(); // Should not throw!
}
private static class NonWritableAfterClose extends FilterOutputStream {
private boolean closed = false;
public NonWritableAfterClose(OutputStream out) {
super(out);
}
@Override
public void write(int b) throws IOException {
if (closed) throw new IOException("Stream is closed");
super.write(b);
}
@Override
public void write(byte[] b, int off, int len) throws IOException {
if (closed) throw new IOException("Stream is closed");
super.write(b, off, len);
}
@Override
public void close() throws IOException {
super.close();
closed = true;
}
}
}
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