/*
* ModeShape (http://www.modeshape.org)
*
* 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 org.modeshape.common.util;
import static org.hamcrest.core.Is.is;
import static org.junit.Assert.assertThat;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.Reader;
import java.io.StringReader;
import java.io.Writer;
import org.junit.Test;
public class IoUtilTest {
@Test
public void readBytesShouldReturnEmptyByteArrayForNullInputStream() throws Exception {
assertThat(IoUtil.readBytes((InputStream)null), is(new byte[] {}));
}
@Test
public void readBytesShouldReadInputStreamCorrectlyAndShouldCloseStream() throws Exception {
// Read content shorter than buffer size ...
String content = "This is the way to grandma's house.";
InputStream stream = new ByteArrayInputStream(content.getBytes());
InputStreamWrapper wrapper = new InputStreamWrapper(stream);
assertThat(wrapper.isClosed(), is(false));
byte[] bytes = IoUtil.readBytes(wrapper);
String output = new String(bytes);
assertThat(output, is(content));
assertThat(wrapper.isClosed(), is(true));
// Read content longer than buffer size ...
for (int i = 0; i != 10; ++i) {
content += content; // note this doubles each time!
}
stream = new ByteArrayInputStream(content.getBytes());
wrapper = new InputStreamWrapper(stream);
assertThat(wrapper.isClosed(), is(false));
bytes = IoUtil.readBytes(wrapper);
output = new String(bytes);
assertThat(output, is(content));
assertThat(wrapper.isClosed(), is(true));
}
@Test
public void readShouldReturnEmptyStringForNullInputStream() throws Exception {
assertThat(IoUtil.read((InputStream)null), is(""));
}
@Test
public void readShouldReturnEmptyStringForNullReader() throws Exception {
assertThat(IoUtil.read((Reader)null), is(""));
}
@Test
public void readShouldReadInputStreamCorrectlyAndShouldCloseStream() throws Exception {
// Read content shorter than buffer size ...
String content = "This is the way to grandma's house.";
InputStream stream = new ByteArrayInputStream(content.getBytes());
InputStreamWrapper wrapper = new InputStreamWrapper(stream);
assertThat(wrapper.isClosed(), is(false));
assertThat(IoUtil.read(wrapper), is(content));
assertThat(wrapper.isClosed(), is(true));
// Read content longer than buffer size ...
for (int i = 0; i != 10; ++i) {
content += content; // note this doubles each time!
}
stream = new ByteArrayInputStream(content.getBytes());
wrapper = new InputStreamWrapper(stream);
assertThat(wrapper.isClosed(), is(false));
assertThat(IoUtil.read(wrapper), is(content));
assertThat(wrapper.isClosed(), is(true));
}
@Test
public void readShouldReadReaderCorrectlyAndShouldCloseStream() throws Exception {
// Read content shorter than buffer size ...
String content = "This is the way to grandma's house.";
Reader reader = new StringReader(content);
ReaderWrapper wrapper = new ReaderWrapper(reader);
assertThat(wrapper.isClosed(), is(false));
assertThat(IoUtil.read(wrapper), is(content));
assertThat(wrapper.isClosed(), is(true));
// Read content longer than buffer size ...
for (int i = 0; i != 10; ++i) {
content += content; // note this doubles each time!
}
reader = new StringReader(content);
wrapper = new ReaderWrapper(reader);
assertThat(wrapper.isClosed(), is(false));
assertThat(IoUtil.read(wrapper), is(content));
assertThat(wrapper.isClosed(), is(true));
}
protected class InputStreamWrapper extends InputStream {
private boolean closed = false;
private final InputStream stream;
protected InputStreamWrapper( InputStream stream ) {
this.stream = stream;
}
public boolean isClosed() {
return closed;
}
@Override
public int read() throws IOException {
return stream.read();
}
@Override
public void close() throws IOException {
stream.close();
this.closed = true;
}
}
protected class ReaderWrapper extends Reader {
private boolean closed = false;
private final Reader reader;
protected ReaderWrapper( Reader reader ) {
this.reader = reader;
}
public boolean isClosed() {
return closed;
}
@Override
public void close() throws IOException {
reader.close();
this.closed = true;
}
@Override
public int read( char[] cbuf,
int off,
int len ) throws IOException {
return reader.read(cbuf, off, len);
}
}
protected class OutputStreamWrapper extends OutputStream {
private boolean closed = false;
private final OutputStream stream;
protected OutputStreamWrapper( OutputStream stream ) {
this.stream = stream;
}
public boolean isClosed() {
return closed;
}
@Override
public void close() throws IOException {
stream.close();
this.closed = true;
}
/**
* {@inheritDoc}
*/
@Override
public void write( int b ) throws IOException {
stream.write(b);
}
}
protected class WriterWrapper extends Writer {
private boolean closed = false;
private final Writer writer;
protected WriterWrapper( Writer writer ) {
this.writer = writer;
}
public boolean isClosed() {
return closed;
}
@Override
public void close() throws IOException {
writer.close();
this.closed = true;
}
/**
* {@inheritDoc}
*/
@Override
public void flush() throws IOException {
writer.flush();
}
/**
* {@inheritDoc}
*/
@Override
public void write( char[] cbuf,
int off,
int len ) throws IOException {
writer.write(cbuf, off, len);
}
}
}