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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.
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  package org.apache.beam.runners.samza.util;
  
  import static org.junit.Assert.assertEquals;
  
  import java.io.IOException;
  import org.apache.beam.sdk.Pipeline;
  import org.apache.beam.sdk.coders.Coder;
  import org.apache.beam.sdk.coders.KvCoder;
  import org.apache.beam.sdk.coders.StringUtf8Coder;
  import org.apache.beam.sdk.coders.VarLongCoder;
  import org.apache.beam.sdk.coders.VoidCoder;
  import org.apache.beam.sdk.transforms.windowing.FixedWindows;
  import org.apache.beam.sdk.transforms.windowing.IntervalWindow;
  import org.apache.beam.sdk.transforms.windowing.TimestampCombiner;
  import org.apache.beam.sdk.util.construction.Environments;
  import org.apache.beam.sdk.util.construction.SdkComponents;
  import org.apache.beam.sdk.values.KV;
  import org.apache.beam.sdk.values.PCollection;
  import org.apache.beam.sdk.values.WindowingStrategy;
  import org.joda.time.Duration;
  import org.junit.Test;
  
  /** Unit tests for {@link WindowUtils}. */
  public class WindowUtilsTest {
  
    @Test
    public void testGetWindowStrategy() throws IOException {
      SdkComponents components = SdkComponents.create();
      String environmentId =
          components.registerEnvironment(Environments.createDockerEnvironment("java"));
      WindowingStrategy<Object, IntervalWindow> expected =
          WindowingStrategy.of(FixedWindows.of(Duration.standardMinutes(1)))
              .withMode(WindowingStrategy.AccumulationMode.DISCARDING_FIRED_PANES)
              .withTimestampCombiner(TimestampCombiner.END_OF_WINDOW)
              .withAllowedLateness(Duration.ZERO)
              .withEnvironmentId(environmentId);
      components.registerWindowingStrategy(expected);
      String collectionId =
          components.registerPCollection(
              PCollection.createPrimitiveOutputInternal(
                      Pipeline.create(), expected, PCollection.IsBounded.BOUNDED, VoidCoder.of())
                  .setName("name"));
  
      WindowingStrategy<?, ?> actual =
          WindowUtils.getWindowStrategy(collectionId, components.toComponents());
  
      assertEquals(expected, actual);
    }
  
    @Test
    public void testInstantiateWindowedCoder() throws IOException {
      Coder<KV<Long, String>> expectedValueCoder =
          KvCoder.of(VarLongCoder.of(), StringUtf8Coder.of());
      SdkComponents components = SdkComponents.create();
      components.registerEnvironment(Environments.createDockerEnvironment("java"));
      String collectionId =
          components.registerPCollection(
              PCollection.createPrimitiveOutputInternal(
                      Pipeline.create(),
                      WindowingStrategy.globalDefault(),
                      PCollection.IsBounded.BOUNDED,
                      expectedValueCoder)
                  .setName("name"));
  
      assertEquals(
          expectedValueCoder,
          WindowUtils.instantiateWindowedCoder(collectionId, components.toComponents())
              .getValueCoder());
    }
  }
  