/*
* 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.io;
import java.io.ByteArrayInputStream;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.Reader;
import java.io.StringWriter;
import java.io.Writer;
import java.util.Arrays;
import org.apache.commons.io.output.ByteArrayOutputStream;
import org.apache.commons.io.testtools.FileBasedTestCase;
import org.apache.commons.io.testtools.TestUtils;
import org.apache.commons.io.testtools.YellOnCloseInputStream;
import org.apache.commons.io.testtools.YellOnFlushAndCloseOutputStream;
import org.junit.Test;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;
@SuppressWarnings("deprecation") // these are test cases for the deprecated CopyUtils
/**
* JUnit tests for CopyUtils.
*
* @see CopyUtils
*/
public class CopyUtilsTest extends FileBasedTestCase {
/*
* NOTE this is not particularly beautiful code. A better way to check for
* flush and close status would be to implement "trojan horse" wrapper
* implementations of the various stream classes, which set a flag when
* relevant methods are called. (JT)
*/
private static final int FILE_SIZE = 1024 * 4 + 1;
private final byte[] inData = TestUtils.generateTestData((long) FILE_SIZE);
// ----------------------------------------------------------------
// Tests
// ----------------------------------------------------------------
@Test
public void testCtor() {
new CopyUtils();
// Nothing to assert, the constructor is public and does not blow up.
}
@Test
public void copy_byteArrayToOutputStream() throws Exception {
final ByteArrayOutputStream baout = new ByteArrayOutputStream();
final OutputStream out = new YellOnFlushAndCloseOutputStream(baout, false, true);
CopyUtils.copy(inData, out);
assertEquals("Sizes differ", inData.length, baout.size());
assertTrue("Content differs", Arrays.equals(inData, baout.toByteArray()));
}
@Test
public void copy_byteArrayToWriter() throws Exception {
final ByteArrayOutputStream baout = new ByteArrayOutputStream();
final OutputStream out = new YellOnFlushAndCloseOutputStream(baout, false, true);
final Writer writer = new java.io.OutputStreamWriter(out, "US-ASCII");
CopyUtils.copy(inData, writer);
writer.flush();
assertEquals("Sizes differ", inData.length, baout.size());
assertTrue("Content differs", Arrays.equals(inData, baout.toByteArray()));
}
@Test
public void testCopy_byteArrayToWriterWithEncoding() throws Exception {
final String inDataStr = "data";
final String charsetName = "UTF-8";
final StringWriter writer = new StringWriter();
CopyUtils.copy(inDataStr.getBytes(charsetName), writer, charsetName);
assertEquals(inDataStr, writer.toString());
}
@SuppressWarnings("resource") // 'in' is deliberately not closed
@Test
public void testCopy_inputStreamToOutputStream() throws Exception {
InputStream in = new ByteArrayInputStream(inData);
in = new YellOnCloseInputStream(in);
final ByteArrayOutputStream baout = new ByteArrayOutputStream();
final OutputStream out = new YellOnFlushAndCloseOutputStream(baout, false, true);
final int count = CopyUtils.copy(in, out);
assertEquals("Not all bytes were read", 0, in.available());
assertEquals("Sizes differ", inData.length, baout.size());
assertTrue("Content differs", Arrays.equals(inData, baout.toByteArray()));
assertEquals(inData.length, count);
}
@SuppressWarnings("resource") // 'in' is deliberately not closed
@Test
public void copy_inputStreamToWriter() throws Exception {
InputStream in = new ByteArrayInputStream(inData);
in = new YellOnCloseInputStream(in);
final ByteArrayOutputStream baout = new ByteArrayOutputStream();
final OutputStream out = new YellOnFlushAndCloseOutputStream(baout, false, true);
final Writer writer = new java.io.OutputStreamWriter(out, "US-ASCII");
CopyUtils.copy(in, writer);
writer.flush();
assertEquals("Not all bytes were read", 0, in.available());
assertEquals("Sizes differ", inData.length, baout.size());
assertTrue("Content differs", Arrays.equals(inData, baout.toByteArray()));
}
@Test
public void copy_inputStreamToWriterWithEncoding() throws Exception {
final String inDataStr = "data";
final String charsetName = "UTF-8";
final StringWriter writer = new StringWriter();
CopyUtils.copy(new ByteArrayInputStream(inDataStr.getBytes(charsetName)), writer, charsetName);
assertEquals(inDataStr, writer.toString());
}
@SuppressWarnings("resource") // 'in' is deliberately not closed
@Test
public void testCopy_readerToOutputStream() throws Exception {
InputStream in = new ByteArrayInputStream(inData);
in = new YellOnCloseInputStream(in);
final Reader reader = new java.io.InputStreamReader(in, "US-ASCII");
final ByteArrayOutputStream baout = new ByteArrayOutputStream();
final OutputStream out = new YellOnFlushAndCloseOutputStream(baout, false, true);
CopyUtils.copy(reader, out);
//Note: this method *does* flush. It is equivalent to:
// OutputStreamWriter _out = new OutputStreamWriter(fout);
// IOUtils.copy( fin, _out, 4096 ); // copy( Reader, Writer, int );
// _out.flush();
// out = fout;
// Note: rely on the method to flush
assertEquals("Sizes differ", inData.length, baout.size());
assertTrue("Content differs", Arrays.equals(inData, baout.toByteArray()));
}
@SuppressWarnings("resource") // 'in' is deliberately not closed
@Test
public void copy_readerToWriter() throws Exception {
InputStream in = new ByteArrayInputStream(inData);
in = new YellOnCloseInputStream(in);
final Reader reader = new java.io.InputStreamReader(in, "US-ASCII");
final ByteArrayOutputStream baout = new ByteArrayOutputStream();
final OutputStream out = new YellOnFlushAndCloseOutputStream(baout, false, true);
final Writer writer = new java.io.OutputStreamWriter(out, "US-ASCII");
final int count = CopyUtils.copy(reader, writer);
writer.flush();
assertEquals(
"The number of characters returned by copy is wrong",
inData.length,
count);
assertEquals("Sizes differ", inData.length, baout.size());
assertTrue("Content differs", Arrays.equals(inData, baout.toByteArray()));
}
@Test
public void copy_stringToOutputStream() throws Exception {
final String str = new String(inData, "US-ASCII");
final ByteArrayOutputStream baout = new ByteArrayOutputStream();
final OutputStream out = new YellOnFlushAndCloseOutputStream(baout, false, true);
CopyUtils.copy(str, out);
//Note: this method *does* flush. It is equivalent to:
// OutputStreamWriter _out = new OutputStreamWriter(fout);
// IOUtils.copy( str, _out, 4096 ); // copy( Reader, Writer, int );
// _out.flush();
// out = fout;
// note: we don't flush here; this IOUtils method does it for us
assertEquals("Sizes differ", inData.length, baout.size());
assertTrue("Content differs", Arrays.equals(inData, baout.toByteArray()));
}
@Test
public void copy_stringToWriter() throws Exception {
final String str = new String(inData, "US-ASCII");
final ByteArrayOutputStream baout = new ByteArrayOutputStream();
final OutputStream out = new YellOnFlushAndCloseOutputStream(baout, false, true);
final Writer writer = new java.io.OutputStreamWriter(out, "US-ASCII");
CopyUtils.copy(str, writer);
writer.flush();
assertEquals("Sizes differ", inData.length, baout.size());
assertTrue("Content differs", Arrays.equals(inData, baout.toByteArray()));
}
} // CopyUtilsTest