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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.hadoop.chukwa.extraction.demux;
  
  import org.apache.hadoop.chukwa.extraction.engine.ChukwaRecordKey;
  import org.apache.hadoop.chukwa.extraction.engine.ChukwaRecord;
  import org.apache.hadoop.chukwa.extraction.demux.processor.mapper.ChukwaTestOutputCollector;
  import org.apache.hadoop.mapred.Reporter;
  import org.apache.hadoop.mapred.JobConf;
  import org.apache.hadoop.mapred.Reducer;
  import junit.framework.TestCase;
  
  import java.io.IOException;
  
  /**
   * Tests that settings related to the Demux mapper do what they should.
   */
  public class TestDemuxReducerConfigs extends TestCase {
  
    public static  String SAMPLE_RECORD_DATA = "sampleRecordData";
  
    public void testSetDefaultReducerProcessor() throws IOException {
      Reducer<ChukwaRecordKey, ChukwaRecord, ChukwaRecordKey, ChukwaRecord> reducer =
              new Demux.ReduceClass();
  
      JobConf conf = new JobConf();
      conf.set("chukwa.demux.reducer.default.processor", ",org.apache.hadoop.chukwa.extraction.demux.processor.reducer" +
              ".MockReduceProcessor");
      reducer.configure(conf);
  
      ChukwaRecordKey key = new ChukwaRecordKey("someReduceType", "someKey");
      ChukwaTestOutputCollector<ChukwaRecordKey, ChukwaRecord> output =
              new ChukwaTestOutputCollector<ChukwaRecordKey, ChukwaRecord>();
  
      reducer.reduce(key, null, output, Reporter.NULL);
  
      assertEquals("MockReduceProcessor never invoked - no records found", 1, output.data.size());
      assertNotNull("MockReduceProcessor never invoked", output.data.get(key));
      assertEquals("MockReduceProcessor never invoked - key value incorrect",
              "MockReduceProcessorValue",
              output.data.get(key).getValue("MockReduceProcessorKey"));
    }
  
    public void testSetCustomReducerProcessor() throws IOException {
      Reducer<ChukwaRecordKey, ChukwaRecord, ChukwaRecordKey, ChukwaRecord> reducer =
              new Demux.ReduceClass();
  
      JobConf conf = new JobConf();
      String cus_reduceType = "someReduceType";
      conf.set(cus_reduceType, ",org.apache.hadoop.chukwa.extraction.demux.processor.reducer" +
              ".MockReduceProcessor");
      reducer.configure(conf);
  
      ChukwaRecordKey key = new ChukwaRecordKey(cus_reduceType, "someKey");
      ChukwaTestOutputCollector<ChukwaRecordKey, ChukwaRecord> output =
              new ChukwaTestOutputCollector<ChukwaRecordKey, ChukwaRecord>();
  
      reducer.reduce(key, null, output, Reporter.NULL);
  
      assertEquals("MockReduceProcessor never invoked - no records found", 1, output.data.size());
      assertNotNull("MockReduceProcessor never invoked", output.data.get(key));
      assertEquals("MockReduceProcessor never invoked - key value incorrect",
              "MockReduceProcessorValue",
              output.data.get(key).getValue("MockReduceProcessorKey"));
    }
  }