/**
* 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.mapreduce.lib.input;
import java.io.FileWriter;
import java.io.IOException;
import java.io.File;
import org.junit.Assert;
import org.apache.hadoop.fs.FileUtil;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.io.LongWritable;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.mapred.JobConf;
import org.apache.hadoop.mapreduce.TaskAttemptContext;
import org.apache.hadoop.mapreduce.task.TaskAttemptContextImpl;
import org.apache.hadoop.mapreduce.TaskAttemptID;
import org.apache.hadoop.mapred.Task.TaskReporter;
import org.mockito.Mockito;
import org.junit.Test;
import static org.mockito.Mockito.times;
import static org.mockito.Mockito.verify;
public class TestCombineFileRecordReader {
private static Path outDir = new Path(System.getProperty("test.build.data",
"/tmp"), TestCombineFileRecordReader.class.getName());
private static class TextRecordReaderWrapper
extends CombineFileRecordReaderWrapper<LongWritable,Text> {
// this constructor signature is required by CombineFileRecordReader
public TextRecordReaderWrapper(org.apache.hadoop.mapreduce.lib.input.CombineFileSplit split,
TaskAttemptContext context, Integer idx)
throws IOException, InterruptedException {
super(new TextInputFormat(), split, context, idx);
}
}
@SuppressWarnings("unchecked")
@Test
public void testProgressIsReportedIfInputASeriesOfEmptyFiles() throws IOException, InterruptedException {
JobConf conf = new JobConf();
Path[] paths = new Path[3];
File[] files = new File[3];
long[] fileLength = new long[3];
try {
for(int i=0;i<3;i++){
File dir = new File(outDir.toString());
dir.mkdir();
files[i] = new File(dir,"testfile"+i);
FileWriter fileWriter = new FileWriter(files[i]);
fileWriter.flush();
fileWriter.close();
fileLength[i] = i;
paths[i] = new Path(outDir+"/testfile"+i);
}
CombineFileSplit combineFileSplit = new CombineFileSplit(paths, fileLength);
TaskAttemptID taskAttemptID = Mockito.mock(TaskAttemptID.class);
TaskReporter reporter = Mockito.mock(TaskReporter.class);
TaskAttemptContextImpl taskAttemptContext =
new TaskAttemptContextImpl(conf, taskAttemptID,reporter);
CombineFileRecordReader cfrr = new CombineFileRecordReader(combineFileSplit,
taskAttemptContext, TextRecordReaderWrapper.class);
cfrr.initialize(combineFileSplit,taskAttemptContext);
verify(reporter).progress();
Assert.assertFalse(cfrr.nextKeyValue());
verify(reporter, times(3)).progress();
} finally {
FileUtil.fullyDelete(new File(outDir.toString()));
}
}
}