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.
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  package org.apache.beam.runners.dataflow.worker.util;
  
  import org.apache.beam.runners.core.StateInternalsFactory;
  import org.apache.beam.runners.core.SystemReduceFn;
  import org.apache.beam.runners.dataflow.worker.util.GroupAlsoByWindowProperties.GroupAlsoByWindowDoFnFactory;
  import org.apache.beam.sdk.coders.Coder;
  import org.apache.beam.sdk.coders.StringUtf8Coder;
  import org.apache.beam.sdk.transforms.windowing.BoundedWindow;
  import org.apache.beam.sdk.values.WindowingStrategy;
  import org.junit.Test;
  import org.junit.runner.RunWith;
  import org.junit.runners.JUnit4;
  
  /** Unit tests for {@link BatchGroupAlsoByWindowViaOutputBufferFn}. */
  @RunWith(JUnit4.class)
  public class GroupAlsoByWindowViaOutputBufferDoFnTest {
  
    private class BufferingGABWViaOutputBufferDoFnFactory<K, InputT>
        implements GroupAlsoByWindowDoFnFactory<K, InputT, Iterable<InputT>> {
  
      private final Coder<InputT> inputCoder;
  
      public BufferingGABWViaOutputBufferDoFnFactory(Coder<InputT> inputCoder) {
        this.inputCoder = inputCoder;
      }
  
      @Override
      public <W extends BoundedWindow>
          BatchGroupAlsoByWindowFn<K, InputT, Iterable<InputT>> forStrategy(
              WindowingStrategy<?, W> windowingStrategy,
              StateInternalsFactory<K> stateInternalsFactory) {
        return new BatchGroupAlsoByWindowViaOutputBufferFn<K, InputT, Iterable<InputT>, W>(
            windowingStrategy,
            stateInternalsFactory,
            SystemReduceFn.<K, InputT, W>buffering(inputCoder));
      }
    }
  
    @Test
    public void testEmptyInputEmptyOutput() throws Exception {
      GroupAlsoByWindowProperties.emptyInputEmptyOutput(
          new BufferingGABWViaOutputBufferDoFnFactory<>(StringUtf8Coder.of()));
    }
  
    @Test
    public void testGroupsElementsIntoFixedWindows() throws Exception {
      GroupAlsoByWindowProperties.groupsElementsIntoFixedWindows(
          new BufferingGABWViaOutputBufferDoFnFactory<String, String>(StringUtf8Coder.of()));
    }
  
    @Test
    public void testGroupsElementsIntoSlidingWindows() throws Exception {
      GroupAlsoByWindowProperties.groupsElementsIntoSlidingWindowsWithMinTimestamp(
          new BufferingGABWViaOutputBufferDoFnFactory<String, String>(StringUtf8Coder.of()));
    }
  
    @Test
    public void testGroupsIntoOverlappingNonmergingWindows() throws Exception {
      GroupAlsoByWindowProperties.groupsIntoOverlappingNonmergingWindows(
          new BufferingGABWViaOutputBufferDoFnFactory<String, String>(StringUtf8Coder.of()));
    }
  
    @Test
    public void testGroupsIntoSessions() throws Exception {
      GroupAlsoByWindowProperties.groupsElementsInMergedSessions(
          new BufferingGABWViaOutputBufferDoFnFactory<String, String>(StringUtf8Coder.of()));
    }
  
    @Test
    public void testGroupsElementsIntoFixedWindowsWithEndOfWindowTimestamp() throws Exception {
      GroupAlsoByWindowProperties.groupsElementsIntoFixedWindowsWithEndOfWindowTimestamp(
          new BufferingGABWViaOutputBufferDoFnFactory<String, String>(StringUtf8Coder.of()));
    }
  
    @Test
    public void testGroupsElementsIntoFixedWindowsWithLatestTimestamp() throws Exception {
      GroupAlsoByWindowProperties.groupsElementsIntoFixedWindowsWithLatestTimestamp(
          new BufferingGABWViaOutputBufferDoFnFactory<String, String>(StringUtf8Coder.of()));
    }
  
    @Test
    public void testGroupsElementsIntoSessionsWithEndOfWindowTimestamp() throws Exception {
      GroupAlsoByWindowProperties.groupsElementsInMergedSessionsWithEndOfWindowTimestamp(
          new BufferingGABWViaOutputBufferDoFnFactory<String, String>(StringUtf8Coder.of()));
    }
  
    @Test
    public void testGroupsElementsIntoSessionsWithLatestTimestamp() throws Exception {
      GroupAlsoByWindowProperties.groupsElementsInMergedSessionsWithLatestTimestamp(
          new BufferingGABWViaOutputBufferDoFnFactory<String, String>(StringUtf8Coder.of()));
    }
  }
  