/**
* Copyright 2011 Nube Technologies
*
* 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 co.nubetech.hiho.similarity.ngram;
import java.util.ArrayList;
import java.util.List;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.io.IOUtils;
import org.apache.hadoop.io.IntWritable;
import org.apache.hadoop.io.SequenceFile;
import org.apache.hadoop.io.Writable;
import org.apache.hadoop.util.ReflectionUtils;
import org.apache.hadoop.util.ToolRunner;
import org.apache.log4j.Logger;
import org.junit.Test;
import co.nubetech.hiho.common.HIHOException;
import co.nubetech.hiho.common.HihoTestCase;
public class TestNGramJob extends HihoTestCase {
final static Logger logger = Logger
.getLogger(co.nubetech.hiho.similarity.ngram.TestNGramJob.class);
@Test
public void testCheckMandatoryConfsValidValues() throws HIHOException {
String[] args = new String[] {
"-inputPath", "testData",
};
NGramJob nGramJob = new NGramJob();
nGramJob.populateConfiguration(args);
nGramJob.checkMandatoryConfs();
}
@Test(expected = HIHOException.class)
public void testCheckMandatoryConfsForExpectedExceptionInInputPath()
throws HIHOException {
String[] args = new String[] {};
NGramJob nGramJob = new NGramJob();
nGramJob.populateConfiguration(args);
nGramJob.checkMandatoryConfs();
}
public NGramJob runNgramJob(String[] args) throws Exception {
NGramJob job = new NGramJob();
int res = ToolRunner.run(createJobConf(), job, args);
assertEquals(0, res);
return job;
}
@Test
public void testNGramJobForValidValues() throws Exception{
final String inputData = "This is a book value1\nThis is not a book value2";
createTextFileInHDFS(inputData, "/input", "testFile1.txt");
String[] args = new String[] {
"-inputPath", "/input"
};
NGramJob job = runNgramJob(args);
FileSystem outputFS = getFileSystem();
Path outputPath = new Path(outputFS.getHomeDirectory(), "outputOfNGramJob/part-r-00000");
Configuration conf = new Configuration();
SequenceFile.Reader reader = new SequenceFile.Reader(outputFS, outputPath, conf);
Writable writableKey = (Writable)
ReflectionUtils.newInstance(reader.getKeyClass(), conf);
Writable writableValue = (Writable)
ReflectionUtils.newInstance(reader.getValueClass(), conf);
List<IntWritable> expectedOutputForValue = new ArrayList<IntWritable>();
expectedOutputForValue.add(new IntWritable(1));
expectedOutputForValue.add(new IntWritable(1));
int count = 0;
while (reader.next(writableKey, writableValue)) {
logger.debug("Key and value is: " + writableKey + ", " + writableValue);
assertTrue("Matched output " + writableValue , expectedOutputForValue.contains(writableValue));
count++;
}
IOUtils.closeStream(reader);
assertEquals(2, count);
}
}