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 org.apache.beam.sdk.extensions.euphoria.core.testkit;
  
  import java.util.Arrays;
  import java.util.List;
  import org.apache.beam.sdk.extensions.euphoria.core.client.operator.AssignEventTime;
  import org.apache.beam.sdk.extensions.euphoria.core.client.operator.SumByKey;
  import org.apache.beam.sdk.transforms.windowing.DefaultTrigger;
  import org.apache.beam.sdk.transforms.windowing.FixedWindows;
  import org.apache.beam.sdk.values.KV;
  import org.apache.beam.sdk.values.PCollection;
  import org.apache.beam.sdk.values.TypeDescriptor;
  import org.junit.Test;
  import org.junit.runner.RunWith;
  import org.junit.runners.JUnit4;
  
  /** Test operator {@code SumByKey}. */
  @RunWith(JUnit4.class)
  public class SumByKeyTest extends AbstractOperatorTest {
  
    @Test
    public void testSumByKey() {
      execute(
          new AbstractTestCase<Integer, KV<Integer, Long>>() {
            @Override
            protected PCollection<KV<Integer, Long>> getOutput(PCollection<Integer> input) {
              final PCollection<Integer> inputWithTime =
                  AssignEventTime.of(input).using(i -> 0).output();
              return SumByKey.of(inputWithTime)
                  .keyBy(e -> e % 2)
                  .valueBy(e -> (long) e)
                  .windowBy(FixedWindows.of(org.joda.time.Duration.standardHours(1)))
                  .triggeredBy(DefaultTrigger.of())
                  .discardingFiredPanes()
                  .output();
            }
  
            @Override
            protected List<Integer> getInput() {
              return Arrays.asList(1, 2, 3, 4, 5, 6, 7, 8, 9);
            }
  
            @Override
            protected TypeDescriptor<Integer> getInputType() {
              return null;
            }
  
            @Override
            public List<KV<Integer, Long>> getUnorderedOutput() {
              return Arrays.asList(KV.of(0, 20L), KV.of(1, 25L));
            }
          });
    }
  }
  