/*
* 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.count;
import java.io.IOException;
import org.apache.hadoop.io.LongWritable;
import org.apache.hadoop.mrunit.mapreduce.MapDriver;
import org.apache.jena.hadoop.rdf.mapreduce.AbstractMapperTests;
import org.apache.jena.hadoop.rdf.mapreduce.count.AbstractNodeTupleNodeCountMapper;
import org.apache.jena.hadoop.rdf.types.AbstractNodeTupleWritable;
import org.apache.jena.hadoop.rdf.types.NodeWritable;
import org.junit.Test;
/**
* Abstract tests for mappers derived from
* {@link AbstractNodeTupleNodeCountMapper}
*
*
*
* @param <TValue>
* Tuple type
* @param <T>
* Writable tuple type
*/
public abstract class AbstractNodeTupleNodeCountTests<TValue, T extends AbstractNodeTupleWritable<TValue>> extends
AbstractMapperTests<LongWritable, T, NodeWritable, LongWritable> {
/**
* Generates tuples for the tests
*
* @param driver
* Driver
* @param num
* Number of tuples to generate
*/
protected void generateData(MapDriver<LongWritable, T, NodeWritable, LongWritable> driver, int num) {
LongWritable expectedCount = new LongWritable(1);
for (int i = 0; i < num; i++) {
LongWritable key = new LongWritable(i);
T value = this.createValue(i);
NodeWritable[] nodes = this.getNodes(value);
driver.addInput(key, value);
for (NodeWritable n : nodes) {
driver.addOutput(n, expectedCount);
}
}
}
/**
* Creates a tuple value
*
* @param i
* Index
* @return Tuple value
*/
protected abstract T createValue(int i);
/**
* Splits the tuple value into its constituent nodes
*
* @param tuple
* Tuple value
* @return Nodes
*/
protected abstract NodeWritable[] getNodes(T tuple);
/**
* Runs a node count test
*
* @param num
* Number of tuples to generate
* @throws IOException
*/
protected void testNodeCount(int num) throws IOException {
MapDriver<LongWritable, T, NodeWritable, LongWritable> driver = this.getMapDriver();
this.generateData(driver, num);
driver.runTest();
}
/**
* Tests node counting
*
* @throws IOException
*/
@Test
public void node_count_01() throws IOException {
this.testNodeCount(1);
}
/**
* Tests node counting
*
* @throws IOException
*/
@Test
public void node_count_02() throws IOException {
this.testNodeCount(100);
}
/**
* Tests node counting
*
* @throws IOException
*/
@Test
public void node_count_03() throws IOException {
this.testNodeCount(1000);
}
/**
* Tests node counting
*
* @throws IOException
*/
@Test
public void node_count_04() throws IOException {
this.testNodeCount(2500);
}
}