/**
* 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.hadoop.io;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.fail;
import java.io.ByteArrayInputStream;
import java.io.EOFException;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.RandomAccessFile;
import java.nio.ByteBuffer;
import java.nio.channels.FileChannel;
import org.apache.hadoop.test.GenericTestUtils;
import org.junit.Test;
import org.mockito.Mockito;
/**
* Test cases for IOUtils.java
*/
public class TestIOUtils {
private static final String TEST_FILE_NAME = "test_file";
@Test
public void testCopyBytesShouldCloseStreamsWhenCloseIsTrue() throws Exception {
InputStream inputStream = Mockito.mock(InputStream.class);
OutputStream outputStream = Mockito.mock(OutputStream.class);
Mockito.doReturn(-1).when(inputStream).read(new byte[1]);
IOUtils.copyBytes(inputStream, outputStream, 1, true);
Mockito.verify(inputStream, Mockito.atLeastOnce()).close();
Mockito.verify(outputStream, Mockito.atLeastOnce()).close();
}
@Test
public void testCopyBytesShouldCloseInputSteamWhenOutputStreamCloseThrowsException()
throws Exception {
InputStream inputStream = Mockito.mock(InputStream.class);
OutputStream outputStream = Mockito.mock(OutputStream.class);
Mockito.doReturn(-1).when(inputStream).read(new byte[1]);
Mockito.doThrow(new IOException()).when(outputStream).close();
try{
IOUtils.copyBytes(inputStream, outputStream, 1, true);
} catch (IOException e) {
}
Mockito.verify(inputStream, Mockito.atLeastOnce()).close();
Mockito.verify(outputStream, Mockito.atLeastOnce()).close();
}
@Test
public void testCopyBytesShouldNotCloseStreamsWhenCloseIsFalse()
throws Exception {
InputStream inputStream = Mockito.mock(InputStream.class);
OutputStream outputStream = Mockito.mock(OutputStream.class);
Mockito.doReturn(-1).when(inputStream).read(new byte[1]);
IOUtils.copyBytes(inputStream, outputStream, 1, false);
Mockito.verify(inputStream, Mockito.atMost(0)).close();
Mockito.verify(outputStream, Mockito.atMost(0)).close();
}
@Test
public void testCopyBytesWithCountShouldCloseStreamsWhenCloseIsTrue()
throws Exception {
InputStream inputStream = Mockito.mock(InputStream.class);
OutputStream outputStream = Mockito.mock(OutputStream.class);
Mockito.doReturn(-1).when(inputStream).read(new byte[4096], 0, 1);
IOUtils.copyBytes(inputStream, outputStream, (long) 1, true);
Mockito.verify(inputStream, Mockito.atLeastOnce()).close();
Mockito.verify(outputStream, Mockito.atLeastOnce()).close();
}
@Test
public void testCopyBytesWithCountShouldNotCloseStreamsWhenCloseIsFalse()
throws Exception {
InputStream inputStream = Mockito.mock(InputStream.class);
OutputStream outputStream = Mockito.mock(OutputStream.class);
Mockito.doReturn(-1).when(inputStream).read(new byte[4096], 0, 1);
IOUtils.copyBytes(inputStream, outputStream, (long) 1, false);
Mockito.verify(inputStream, Mockito.atMost(0)).close();
Mockito.verify(outputStream, Mockito.atMost(0)).close();
}
@Test
public void testCopyBytesWithCountShouldThrowOutTheStreamClosureExceptions()
throws Exception {
InputStream inputStream = Mockito.mock(InputStream.class);
OutputStream outputStream = Mockito.mock(OutputStream.class);
Mockito.doReturn(-1).when(inputStream).read(new byte[4096], 0, 1);
Mockito.doThrow(new IOException("Exception in closing the stream")).when(
outputStream).close();
try {
IOUtils.copyBytes(inputStream, outputStream, (long) 1, true);
fail("Should throw out the exception");
} catch (IOException e) {
assertEquals("Not throwing the expected exception.",
"Exception in closing the stream", e.getMessage());
}
Mockito.verify(inputStream, Mockito.atLeastOnce()).close();
Mockito.verify(outputStream, Mockito.atLeastOnce()).close();
}
@Test
public void testWriteFully() throws IOException {
final int INPUT_BUFFER_LEN = 10000;
final int HALFWAY = 1 + (INPUT_BUFFER_LEN / 2);
byte[] input = new byte[INPUT_BUFFER_LEN];
for (int i = 0; i < input.length; i++) {
input[i] = (byte)(i & 0xff);
}
byte[] output = new byte[input.length];
try {
RandomAccessFile raf = new RandomAccessFile(TEST_FILE_NAME, "rw");
FileChannel fc = raf.getChannel();
ByteBuffer buf = ByteBuffer.wrap(input);
IOUtils.writeFully(fc, buf);
raf.seek(0);
raf.read(output);
for (int i = 0; i < input.length; i++) {
assertEquals(input[i], output[i]);
}
buf.rewind();
IOUtils.writeFully(fc, buf, HALFWAY);
for (int i = 0; i < HALFWAY; i++) {
assertEquals(input[i], output[i]);
}
raf.seek(0);
raf.read(output);
for (int i = HALFWAY; i < input.length; i++) {
assertEquals(input[i - HALFWAY], output[i]);
}
} finally {
File f = new File(TEST_FILE_NAME);
if (f.exists()) {
f.delete();
}
}
}
@Test
public void testWrappedReadForCompressedData() throws IOException {
byte[] buf = new byte[2];
InputStream mockStream = Mockito.mock(InputStream.class);
Mockito.when(mockStream.read(buf, 0, 1)).thenReturn(1);
Mockito.when(mockStream.read(buf, 0, 2)).thenThrow(
new java.lang.InternalError());
try {
assertEquals("Check expected value", 1,
IOUtils.wrappedReadForCompressedData(mockStream, buf, 0, 1));
} catch (IOException ioe) {
fail("Unexpected error while reading");
}
try {
IOUtils.wrappedReadForCompressedData(mockStream, buf, 0, 2);
} catch (IOException ioe) {
GenericTestUtils.assertExceptionContains(
"Error while reading compressed data", ioe);
}
}
@Test
public void testSkipFully() throws IOException {
byte inArray[] = new byte[] {0, 1, 2, 3, 4};
ByteArrayInputStream in = new ByteArrayInputStream(inArray);
try {
in.mark(inArray.length);
IOUtils.skipFully(in, 2);
IOUtils.skipFully(in, 2);
try {
IOUtils.skipFully(in, 2);
fail("expected to get a PrematureEOFException");
} catch (EOFException e) {
assertEquals(e.getMessage(), "Premature EOF from inputStream " +
"after skipping 1 byte(s).");
}
in.reset();
try {
IOUtils.skipFully(in, 20);
fail("expected to get a PrematureEOFException");
} catch (EOFException e) {
assertEquals(e.getMessage(), "Premature EOF from inputStream " +
"after skipping 5 byte(s).");
}
in.reset();
IOUtils.skipFully(in, 5);
try {
IOUtils.skipFully(in, 10);
fail("expected to get a PrematureEOFException");
} catch (EOFException e) {
assertEquals(e.getMessage(), "Premature EOF from inputStream " +
"after skipping 0 byte(s).");
}
} finally {
in.close();
}
}
}