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* 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.jena.hadoop.rdf.mapreduce.characteristics;
import java.io.IOException;
import java.util.List;
import org.apache.hadoop.io.NullWritable;
import org.apache.hadoop.mapreduce.Mapper;
import org.apache.hadoop.mapreduce.Reducer;
import org.apache.hadoop.mrunit.mapreduce.MapReduceDriver;
import org.apache.hadoop.mrunit.types.Pair;
import org.apache.jena.graph.NodeFactory ;
import org.apache.jena.hadoop.rdf.mapreduce.AbstractMapReduceTests;
import org.apache.jena.hadoop.rdf.mapreduce.characteristics.CharacteristicSetReducer;
import org.apache.jena.hadoop.rdf.types.CharacteristicSetWritable;
import org.apache.jena.hadoop.rdf.types.CharacteristicWritable;
import org.junit.Assert;
import org.junit.Test;
/**
* Abstract tests for the {@link CharacteristicSetReducer}
*
*
*/
public class CharacteristicSetReducerTest
extends
AbstractMapReduceTests<CharacteristicSetWritable, CharacteristicSetWritable, CharacteristicSetWritable, CharacteristicSetWritable, CharacteristicSetWritable, NullWritable> {
@Override
protected final Mapper<CharacteristicSetWritable, CharacteristicSetWritable, CharacteristicSetWritable, CharacteristicSetWritable> getMapperInstance() {
// Identity mapper
return new Mapper<CharacteristicSetWritable, CharacteristicSetWritable, CharacteristicSetWritable, CharacteristicSetWritable>();
}
@Override
protected final Reducer<CharacteristicSetWritable, CharacteristicSetWritable, CharacteristicSetWritable, NullWritable> getReducerInstance() {
return new CharacteristicSetReducer();
}
/**
* Creates a set consisting of the given predicates
*
* @param predicates
* Predicates
* @return Set
*/
protected CharacteristicSetWritable createSet(
MapReduceDriver<CharacteristicSetWritable, CharacteristicSetWritable, CharacteristicSetWritable, CharacteristicSetWritable, CharacteristicSetWritable, NullWritable> driver,
int inputOccurrences, int outputOccurrences, String... predicates) {
CharacteristicSetWritable set = new CharacteristicSetWritable();
for (String predicateUri : predicates) {
set.add(new CharacteristicWritable(NodeFactory.createURI(predicateUri)));
}
for (int i = 1; i <= inputOccurrences; i++) {
driver.addInput(set, set);
}
for (int i = 1; i <= outputOccurrences; i++) {
driver.addOutput(set, NullWritable.get());
}
return set;
}
/**
* Test characteristic set reduction
*
* @throws IOException
*/
@Test
public void characteristic_set_reducer_01() throws IOException {
MapReduceDriver<CharacteristicSetWritable, CharacteristicSetWritable, CharacteristicSetWritable, CharacteristicSetWritable, CharacteristicSetWritable, NullWritable> driver = this
.getMapReduceDriver();
this.createSet(driver, 1, 1, "http://predicate");
driver.runTest(false);
}
/**
* Test characteristic set reduction
*
* @throws IOException
*/
@Test
public void characteristic_set_reducer_02() throws IOException {
MapReduceDriver<CharacteristicSetWritable, CharacteristicSetWritable, CharacteristicSetWritable, CharacteristicSetWritable, CharacteristicSetWritable, NullWritable> driver = this
.getMapReduceDriver();
this.createSet(driver, 2, 1, "http://predicate");
driver.runTest(false);
driver = getMapReduceDriver();
createSet(driver, 2, 1, "http://predicate");
List<Pair<CharacteristicSetWritable, NullWritable>> results = driver.run();
CharacteristicSetWritable cw = results.get(0).getFirst();
Assert.assertEquals(2, cw.getCount().get());
}
/**
* Test characteristic set reduction
*
* @throws IOException
*/
@Test
public void characteristic_set_reducer_03() throws IOException {
MapReduceDriver<CharacteristicSetWritable, CharacteristicSetWritable, CharacteristicSetWritable, CharacteristicSetWritable, CharacteristicSetWritable, NullWritable> driver = this
.getMapReduceDriver();
this.createSet(driver, 1, 1, "http://predicate");
this.createSet(driver, 1, 1, "http://other");
driver.runTest(false);
}
/**
* Test characteristic set reduction
*
* @throws IOException
*/
@Test
public void characteristic_set_reducer_04() throws IOException {
MapReduceDriver<CharacteristicSetWritable, CharacteristicSetWritable, CharacteristicSetWritable, CharacteristicSetWritable, CharacteristicSetWritable, NullWritable> driver = this
.getMapReduceDriver();
this.createSet(driver, 2, 1, "http://predicate");
this.createSet(driver, 1, 1, "http://other");
driver.runTest(false);
driver = getMapReduceDriver();
createSet(driver, 2, 1, "http://predicate");
createSet(driver, 1, 1, "http://other");
List<Pair<CharacteristicSetWritable, NullWritable>> results = driver.run();
for (Pair<CharacteristicSetWritable, NullWritable> pair : results) {
CharacteristicSetWritable cw = pair.getFirst();
boolean expectTwo = cw.getCharacteristics().next().getNode().get().hasURI("http://predicate");
Assert.assertEquals(expectTwo ? 2 : 1, cw.getCount().get());
}
}
/**
* Test characteristic set reduction
*
* @throws IOException
*/
@Test
public void characteristic_set_reducer_05() throws IOException {
MapReduceDriver<CharacteristicSetWritable, CharacteristicSetWritable, CharacteristicSetWritable, CharacteristicSetWritable, CharacteristicSetWritable, NullWritable> driver = this
.getMapReduceDriver();
this.createSet(driver, 1, 1, "http://predicate", "http://other");
this.createSet(driver, 1, 1, "http://other");
driver.runTest(false);
}
/**
* Test characteristic set reduction
*
* @throws IOException
*/
@Test
public void characteristic_set_reducer_06() throws IOException {
MapReduceDriver<CharacteristicSetWritable, CharacteristicSetWritable, CharacteristicSetWritable, CharacteristicSetWritable, CharacteristicSetWritable, NullWritable> driver = this
.getMapReduceDriver();
this.createSet(driver, 2, 1, "http://predicate", "http://other");
this.createSet(driver, 1, 1, "http://other");
driver.runTest(false);
driver = getMapReduceDriver();
createSet(driver, 2, 1, "http://predicate", "http://other");
createSet(driver, 1, 1, "http://other");
List<Pair<CharacteristicSetWritable, NullWritable>> results = driver.run();
for (Pair<CharacteristicSetWritable, NullWritable> pair : results) {
CharacteristicSetWritable cw = pair.getFirst();
boolean expectTwo = cw.hasCharacteristic("http://predicate");
Assert.assertEquals(expectTwo ? 2 : 1, cw.getCount().get());
}
}
}