Java tutorial
/** * 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. */ import java.util.ArrayList; import java.util.List; import org.apache.hadoop.io.Text; import org.apache.hadoop.mrunit.MapDriver; import org.apache.hadoop.mrunit.MapReduceDriver; import org.apache.hadoop.mrunit.ReduceDriver; import org.junit.Before; import org.junit.Test; public class TestGapDeduce { private MapDriver<Text, Text, Text, Text> mapDriver; private ReduceDriver<Text, Text, Text, Text> reduceDriver; @Before public void setUp() { Gapper mapper = new Gapper(); Deducer reducer = new Deducer(); mapDriver = MapDriver.newMapDriver(mapper); ; reduceDriver = ReduceDriver.newReduceDriver(reducer); } @Test public void testMapper() { mapDriver.withInput(new Text("sanford"), new Text("sage")); mapDriver.withOutput(new Text("sage"), new Text("sanford")); mapDriver.runTest(); } @Test public void testReducer() { List<Text> values = new ArrayList<Text>(); values.add(new Text("sage")); values.add(new Text("ian")); values.add(new Text("sage")); reduceDriver.withInput(new Text("sanford"), values); reduceDriver.withOutput(new Text("sanford"), new Text("[ian, sage]")); reduceDriver.runTest(); } }