| /** |
| * 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.apex.malhar.lib.utils; |
| |
| import java.io.DataInputStream; |
| import java.io.DataOutputStream; |
| import java.io.File; |
| import java.io.IOException; |
| import java.util.EnumSet; |
| import java.util.Random; |
| |
| import org.junit.Assert; |
| import org.junit.Test; |
| |
| import org.apache.commons.io.FileUtils; |
| import org.apache.hadoop.fs.CreateFlag; |
| import org.apache.hadoop.fs.FileContext; |
| import org.apache.hadoop.fs.Options; |
| import org.apache.hadoop.fs.Path; |
| |
| public class IOUtilsTest |
| { |
| |
| @Test |
| public void testCopyPartial() throws IOException |
| { |
| testCopyPartialHelper(1024, 0, 512); |
| } |
| |
| @Test |
| public void testCopyPartialLarge() throws IOException |
| { |
| testCopyPartialHelper(2048, 0, 1068); |
| } |
| |
| @Test |
| public void testCopyFromOffset() throws IOException |
| { |
| testCopyPartialHelper(2048, 1024, 1024); |
| } |
| |
| private void testCopyPartialHelper(int dataSize, int offset, long size) throws IOException |
| { |
| FileUtils.deleteQuietly(new File("target/IOUtilsTest")); |
| File file = new File("target/IOUtilsTest/testCopyPartial/input"); |
| createDataFile(file, dataSize); |
| |
| FileContext fileContext = FileContext.getFileContext(); |
| DataInputStream inputStream = fileContext.open(new Path(file.getAbsolutePath())); |
| |
| Path output = new Path("target/IOUtilsTest/testCopyPartial/output"); |
| DataOutputStream outputStream = fileContext.create(output, EnumSet |
| .of(CreateFlag.CREATE, CreateFlag.OVERWRITE), Options.CreateOpts.CreateParent.createParent()); |
| |
| if (offset == 0) { |
| IOUtils.copyPartial(inputStream, size, outputStream); |
| } else { |
| IOUtils.copyPartial(inputStream, offset, size, outputStream); |
| } |
| |
| outputStream.close(); |
| |
| Assert.assertTrue("output exists", fileContext.util().exists(output)); |
| Assert.assertEquals("output size", size, fileContext.getFileStatus(output).getLen()); |
| // FileUtils.deleteQuietly(new File("target/IOUtilsTest")); |
| } |
| |
| private void createDataFile(File file, int dataSize) throws IOException |
| { |
| byte[] val = new byte[dataSize]; |
| Random random = new Random(); |
| random.nextBytes(val); |
| |
| FileUtils.write(file, new String(val)); |
| } |
| } |