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.runners.samza.translation;
  
  import java.util.Collections;
  import java.util.List;
  import java.util.Map;
  import org.apache.beam.runners.samza.runtime.OpMessage;
  import org.apache.samza.Partition;
  import org.apache.samza.config.MapConfig;
  import org.apache.samza.system.IncomingMessageEnvelope;
  import org.apache.samza.system.SystemConsumer;
  import org.apache.samza.system.SystemStreamPartition;
  import org.apache.samza.system.WatermarkMessage;
  import org.junit.Assert;
  import org.junit.Test;
  
  /**
   * Tests for {@link
   * org.apache.beam.runners.samza.translation.SamzaImpulseSystemFactory.SamzaImpulseSystemConsumer}.
   */
  @SuppressWarnings({
    "rawtypes", // TODO(https://github.com/apache/beam/issues/20447)
  })
  public class SamzaImpulseSystemTest {
    @Test
    public void testSamzaImpulseSystemConsumer() throws Exception {
      SystemConsumer consumer =
          new SamzaImpulseSystemFactory().getConsumer("default-system", new MapConfig(), null);
      Map<SystemStreamPartition, List<IncomingMessageEnvelope>> result =
          consumer.poll(Collections.singleton(sspForPartition(0)), 100);
      Assert.assertEquals(1, result.size());
      Assert.assertTrue(result.containsKey(sspForPartition(0)));
  
      List<IncomingMessageEnvelope> messageEnvelopes = result.get(sspForPartition(0));
      Assert.assertEquals(3, messageEnvelopes.size());
  
      Assert.assertTrue(messageEnvelopes.get(0).getMessage() instanceof OpMessage);
      OpMessage impulseEvent = (OpMessage) messageEnvelopes.get(0).getMessage();
      Assert.assertEquals(OpMessage.Type.ELEMENT, impulseEvent.getType());
  
      Assert.assertTrue(messageEnvelopes.get(1).getMessage() instanceof WatermarkMessage);
  
      Assert.assertTrue(messageEnvelopes.get(2).isEndOfStream());
    }
  
    private SystemStreamPartition sspForPartition(int i) {
      return new SystemStreamPartition("default-system", "default-stream", new Partition(i));
    }
  }
  