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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,
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   * See the License for the specific language governing permissions and
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  package org.apache.beam.learning.katas.coretransforms.sideinput;
  
  import java.util.Map;
  import org.apache.beam.sdk.testing.PAssert;
  import org.apache.beam.sdk.testing.TestPipeline;
  import org.apache.beam.sdk.transforms.Create;
  import org.apache.beam.sdk.values.KV;
  import org.apache.beam.sdk.values.PCollection;
  import org.apache.beam.sdk.values.PCollectionView;
  import org.junit.Rule;
  import org.junit.Test;
  
  public class TaskTest {
  
    @Rule
    public final transient TestPipeline testPipeline = TestPipeline.create();
  
    @Test
    public void sideInput() {
      PCollection<KV<String, String>> citiesToCountries =
          testPipeline.apply("Cities and Countries",
              Create.of(
                  KV.of("Beijing", "China"),
                  KV.of("London", "United Kingdom"),
                  KV.of("San Francisco", "United States"),
                  KV.of("Singapore", "Singapore"),
                  KV.of("Sydney", "Australia")
              ));
  
      PCollectionView<Map<String, String>> citiesToCountriesView =
          Task.createView(citiesToCountries);
  
      PCollection<Person> persons =
          testPipeline.apply("Persons",
              Create.of(
                  new Person("Henry", "Singapore"),
                  new Person("Jane", "San Francisco"),
                  new Person("Lee", "Beijing"),
                  new Person("John", "Sydney"),
                  new Person("Alfred", "London")
              ));
  
      PCollection<Person> results = Task.applyTransform(persons, citiesToCountriesView);
  
      PAssert.that(results)
          .containsInAnyOrder(
              new Person("Henry", "Singapore", "Singapore"),
              new Person("Jane", "San Francisco", "United States"),
              new Person("Lee", "Beijing", "China"),
              new Person("John", "Sydney", "Australia"),
              new Person("Alfred", "London", "United Kingdom")
          );
  
      testPipeline.run().waitUntilFinish();
    }
  
  }