content: /*
   * 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 com.aliyun.odps.mapred.unittest;
  
  import java.io.IOException;
  import java.util.List;
  
  import junit.framework.Assert;
  
  import org.junit.Test;
  
  import com.aliyun.odps.Column;
  import com.aliyun.odps.OdpsType;
  import com.aliyun.odps.data.Record;
  import com.aliyun.odps.io.Text;
  import com.aliyun.odps.mapred.conf.JobConf;
  import com.aliyun.odps.mapred.local.pipeline.PipeLine;
  import com.aliyun.odps.mapred.unittest.*;
  import com.aliyun.odps.pipeline.Pipeline;
  import com.aliyun.odps.pipeline.Pipeline.Builder;
  
  /**
   * This is an example ODPS Map/Reduce application. It reads the input table, map each column into
   * words and counts them. The output is a locally sorted list of words and the count of how often
   * they occurred.
   * <p>
   * To run: mapreduce -libjars mapreduce-examples.jar com.aliyun.odps.mapreduce.examples.WordCount
   * <i>in-tbl</i> <i>out-tbl</i>
   */
  public class WordCountPipelineTest extends MRUnitTest {
    private final static String INPUT_SCHEMA = "a:string,b:string";
    private final static String OUTPUT_SCHEMA = "k:string,v:bigint";
    JobConf job = new JobConf();
    
    public WordCountPipelineTest() throws Exception {
  
      Builder builder = Pipeline.builder();
  
      // mapper
      builder.addMapper(PipeLine.TokenizerMapper.class)
          .setOutputKeySchema(new Column[] {new Column("word", OdpsType.STRING)})
          .setOutputValueSchema(new Column[] {new Column("count", OdpsType.BIGINT)})
          .setOutputKeySortColumns(new String[] {"word"})
          .setOutputGroupingColumns(new String[] {"word"});
  
      job.setCombinerClass(PipeLine.SumCombiner.class);
  
      // reducer1
      builder.addReducer(PipeLine.SumIReducer.class)
          .setOutputKeySchema(new Column[] {new Column("word", OdpsType.STRING),new Column("cnt", OdpsType.BIGINT)})
          .setOutputValueSchema(new Column[] {new Column("count", OdpsType.BIGINT)});
  
      // reducer2
      builder.addReducer(PipeLine.IdentityReducer.class);
  
      Pipeline pipeline = builder.createPipeline();
  
      PipeLine.addInputTable(job, "wc_in");
      PipeLine.addOutputTable(job, "wc_out");
      Pipeline.toJobConf(job, pipeline);
    }
  
    @SuppressWarnings("deprecation")
    @Test
    public void TestMap() throws IOException, ClassNotFoundException, InterruptedException {
  
      // prepare test data
      MapUTContext context = new MapUTContext();
      context.setInputSchema(INPUT_SCHEMA);
      context.setOutputSchema(OUTPUT_SCHEMA, job);
  
      Record record = context.createInputRecord();
      record.set(new Text[] {new Text("hello"), new Text("c")});
      context.addInputRecord(record);
  
      record = context.createInputRecord();
      record.set(new Text[] {new Text("hello"), new Text("java")});
      context.addInputRecord(record);
  
      // run mapper
      TaskOutput output = runMapper(job, context);
  
      // verify mapper outputs
      List<KeyValue<Record, Record>> kvs = output.getOutputKeyValues();
      Assert.assertEquals(3, kvs.size());
      Assert.assertEquals(new KeyValue<String, Long>(new String("c"), new Long(1)),
          new KeyValue<String, Long>((String) (kvs.get(0).getKey().get(0)), (Long) (kvs.get(0)
              .getValue().get(0))));
      Assert.assertEquals(new KeyValue<String, Long>(new String("hello"), new Long(2)),
          new KeyValue<String, Long>((String) (kvs.get(1).getKey().get(0)), (Long) (kvs.get(1)
              .getValue().get(0))));
      Assert.assertEquals(new KeyValue<String, Long>(new String("java"), new Long(1)),
          new KeyValue<String, Long>((String) (kvs.get(2).getKey().get(0)), (Long) (kvs.get(2)
              .getValue().get(0))));
    }
  
    @Test
    public void TestReduce0() throws IOException, ClassNotFoundException, InterruptedException {
  
      ReduceUTContext context = new ReduceUTContext();
      context.setReducerIndex(0);
      context.setOutputSchema(OUTPUT_SCHEMA, job);
  
      Record key = context.createInputKeyRecord(job);
      Record value = context.createInputValueRecord(job);
      key.set(0, "world");
      value.set(0, new Long(1));
      context.addInputKeyValue(key, value);
      key.set(0, "hello");
      value.set(0, new Long(1));
      context.addInputKeyValue(key, value);
      key.set(0, "hello");
      value.set(0, new Long(1));
      context.addInputKeyValue(key, value);
      key.set(0, "odps");
      value.set(0, new Long(1));
      context.addInputKeyValue(key, value);
      TaskOutput output = runReducer(job, context);
  
      List<KeyValue<Record, Record>> kvs = output.getOutputKeyValues();
      Assert.assertEquals(3, kvs.size());
      Assert.assertEquals(new KeyValue<String, Long>(new String("hello"), new Long(2)),
          new KeyValue<String, Long>((String) (kvs.get(0).getKey().get(0)), (Long) (kvs.get(0)
              .getValue().get(0))));
      Assert.assertEquals(new KeyValue<String, Long>(new String("odps"), new Long(1)),
          new KeyValue<String, Long>((String) (kvs.get(1).getKey().get(0)), (Long) (kvs.get(1)
              .getValue().get(0))));
      Assert.assertEquals(new KeyValue<String, Long>(new String("world"), new Long(1)),
          new KeyValue<String, Long>((String) (kvs.get(2).getKey().get(0)), (Long) (kvs.get(2)
              .getValue().get(0))));
    }
    
    @SuppressWarnings("deprecation")
    @Test
    public void TestReduce1() throws IOException, ClassNotFoundException, InterruptedException {
  
      ReduceUTContext context = new ReduceUTContext();
      context.setReducerIndex(1);
      context.setOutputSchema(OUTPUT_SCHEMA, job);
  
      Record key = context.createInputKeyRecord(job);
      Record value = context.createInputValueRecord(job);
      key.set(0, "world");
      key.set(1, new Long(1));
      value.set(0, new Long(1));
      context.addInputKeyValue(key, value);
      key.set(0, "hello");
      key.set(1, new Long(2));
      value.set(0, new Long(2));
      context.addInputKeyValue(key, value);
      key.set(0, "odps");
      key.set(1, new Long(1));
      value.set(0, new Long(1));
      context.addInputKeyValue(key, value);
      TaskOutput output = runReducer(job, context);
  
      List<Record> records = output.getOutputRecords(true);
      Assert.assertEquals(3, records.size());
      Assert.assertEquals(new String("hello"), records.get(0).get(0));
      Assert.assertEquals(new Long(2), records.get(0).get(1));
      Assert.assertEquals(new String("odps"), records.get(1).get(0));
      Assert.assertEquals(new Long(1), records.get(1).get(1));
      Assert.assertEquals(new String("world"), records.get(2).get(0));
      Assert.assertEquals(new Long(1), records.get(2).get(1));
    }
  }
  