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   * Licensed to the Apache Software Foundation (ASF) under one
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   * 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
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   * under the License.
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  package com.aliyun.odps.pipeline;
  
  import static org.junit.Assert.assertEquals;
  import static org.junit.Assert.assertNotNull;
  import static org.junit.Assert.assertNull;
  import static org.junit.Assert.assertTrue;
  
  import org.junit.Test;
  
  import com.aliyun.odps.Column;
  import com.aliyun.odps.OdpsException;
  import com.aliyun.odps.OdpsType;
  import com.aliyun.odps.mapred.conf.JobConf;
  import com.aliyun.odps.mapred.example.WordCount;
  import com.aliyun.odps.mapred.utils.SchemaUtils;
  import com.aliyun.odps.pipeline.Pipeline.TransformNode;
  
  public class PipelineTest {
  
    @Test
    public void testMapOnly() throws OdpsException {
  
      Pipeline pipeline = Pipeline.builder()
          .addMapper(WordCount.TokenizerMapper.class)
          .createPipeline();
  
      assertEquals(pipeline.getNodeNum(), 1);
      assertEquals(pipeline.getFirstNode().getType(), "map");
      assertEquals(pipeline.getLastNode().getType(), "map");
      assertNull(pipeline.getFirstNode().getOutputKeySchema());
      assertNull(pipeline.getFirstNode().getOutputValueSchema());
    }
  
    @Test
    public void testMR1() throws OdpsException {
  
      Pipeline pipeline = Pipeline.builder()
          .addMapper(WordCount.TokenizerMapper.class)
          .setOutputKeySchema(new Column[]{new Column("word", OdpsType.STRING)})
          .setOutputValueSchema(new Column[]{new Column("count", OdpsType.BIGINT)})
          .addReducer(WordCount.SumReducer.class)
          .createPipeline();
  
      assertEquals(pipeline.getNodeNum(), 2);
      assertEquals(pipeline.getFirstNode().getType(), "map");
      assertEquals(pipeline.getLastNode().getType(), "reduce");
      TransformNode mapNode = pipeline.getFirstNode();
      assertNotNull(mapNode.getOutputKeySchema());
      assertNotNull(mapNode.getOutputValueSchema());
      assertTrue(mapNode.getOutputKeySortColumns().length > 0);
      assertEquals(mapNode.getOutputKeySortColumns()[0],
                   SchemaUtils.getNames(mapNode.getOutputKeySchema())[0]);
  
      assertTrue(mapNode.getOutputGroupingColumns().length > 0);
      assertEquals(mapNode.getOutputGroupingColumns()[0],
                   SchemaUtils.getNames(mapNode.getOutputKeySchema())[0]);
    }
  
    @Test
    public void testMR2() throws OdpsException {
  
      Pipeline pipeline = Pipeline.builder()
          .addMapper(WordCount.TokenizerMapper.class,
                     new Column[]{new Column("word", OdpsType.STRING)},
                     new Column[]{new Column("count", OdpsType.BIGINT)},
                     null, null, null, null, null)
          .addReducer(WordCount.SumReducer.class)
          .createPipeline();
  
      assertEquals(pipeline.getNodeNum(), 2);
      assertEquals(pipeline.getFirstNode().getType(), "map");
      assertEquals(pipeline.getLastNode().getType(), "reduce");
      TransformNode mapNode = pipeline.getFirstNode();
      assertNotNull(mapNode.getOutputKeySchema());
      assertNotNull(mapNode.getOutputValueSchema());
      assertTrue(mapNode.getOutputKeySortColumns().length > 0);
      assertEquals(mapNode.getOutputKeySortColumns()[0],
                   SchemaUtils.getNames(mapNode.getOutputKeySchema())[0]);
  
      assertTrue(mapNode.getOutputGroupingColumns().length > 0);
      assertEquals(mapNode.getOutputGroupingColumns()[0],
                   SchemaUtils.getNames(mapNode.getOutputKeySchema())[0]);
    }
  
    @Test
    public void testMRR() throws OdpsException {
  
      Pipeline pipelineOld = Pipeline.builder()
          .addMapper(WordCount.TokenizerMapper.class)
          .setOutputKeySchema(new Column[]{new Column("word", OdpsType.STRING)})
          .setOutputValueSchema(new Column[]{new Column("count", OdpsType.BIGINT)})
          .addReducer(WordCount.SumReducer.class,
                      new Column[]{new Column("word", OdpsType.STRING)},
                      new Column[]{new Column("count", OdpsType.BIGINT)},
                      null, null, null, null, null)
           .setNumTasks(10)
          .addReducer(WordCount.SumReducer.class)
          .createPipeline();
      JobConf conf = new JobConf();
      Pipeline.toJobConf(conf, pipelineOld);
      conf.setNumReduceTasks(2);
  
      Pipeline pipeline = Pipeline.fromJobConf(conf);
      assertNotNull(pipeline);
  
      assertEquals(pipeline.getNodeNum(), 3);
      assertEquals(pipeline.getFirstNode().getType(), "map");
      assertEquals(pipeline.getFirstNode().getNextNode().getType(), "reduce");
      assertEquals(pipeline.getLastNode().getType(), "reduce");
      TransformNode interNode = pipeline.getNode(1);
      assertNotNull(interNode.getOutputKeySchema());
      assertNotNull(interNode.getOutputValueSchema());
      assertTrue(interNode.getOutputKeySortColumns().length > 0);
      assertEquals(interNode.getOutputKeySortColumns()[0],
                   SchemaUtils.getNames(interNode.getOutputKeySchema())[0]);
  
      assertTrue(interNode.getOutputGroupingColumns().length > 0);
      assertEquals(interNode.getOutputGroupingColumns()[0],
                   SchemaUtils.getNames(interNode.getOutputKeySchema())[0]);
      assertEquals(interNode.getOutputValueSchema()[0].getName(), "count");
      assertEquals(interNode.getOutputValueSchema()[0].getType(), OdpsType.BIGINT);
  
      assertEquals(interNode.getNumTasks(), 10);
      assertEquals(interNode.getNextNode().getNumTasks(), 2);
    }
  }
  