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.common.worker;
  
  import static org.apache.beam.runners.dataflow.worker.util.common.worker.TestOutputReceiver.TestOutputCounter.getMeanByteCounterName;
  import static org.apache.beam.runners.dataflow.worker.util.common.worker.TestOutputReceiver.TestOutputCounter.getObjectCounterName;
  import static org.hamcrest.MatcherAssert.assertThat;
  import static org.mockito.Mockito.verify;
  import static org.mockito.Mockito.verifyNoMoreInteractions;
  import static org.mockito.Mockito.when;
  
  import java.io.Closeable;
  import org.apache.beam.runners.dataflow.worker.TestOperationContext;
  import org.apache.beam.runners.dataflow.worker.counters.Counter.CounterUpdateExtractor;
  import org.apache.beam.runners.dataflow.worker.counters.CounterFactory.LongCounterMean;
  import org.apache.beam.runners.dataflow.worker.counters.CounterSet;
  import org.apache.beam.runners.dataflow.worker.counters.NameContext;
  import org.hamcrest.CoreMatchers;
  import org.junit.Test;
  import org.junit.runner.RunWith;
  import org.junit.runners.JUnit4;
  import org.mockito.InOrder;
  import org.mockito.Mockito;
  
  /** Tests for FlattenOperation. */
  @RunWith(JUnit4.class)
  @SuppressWarnings("unchecked")
  public class FlattenOperationTest {
  
    private static final NameContext nameContext =
        NameContext.create("test", "FlattenOperation", "FlattenOperation", "FlattenOperation");
    private final CounterSet counterSet = new CounterSet();
  
    @Test
    public void testRunFlattenOperation() throws Exception {
      TestOutputReceiver receiver =
          new TestOutputReceiver(
              counterSet, NameContext.create("test", "receiver", "receiver", "receiver"));
  
      OperationContext context = TestOperationContext.create(counterSet, nameContext);
      FlattenOperation flattenOperation = new FlattenOperation(receiver, context);
  
      flattenOperation.start();
  
      flattenOperation.process("hi");
      flattenOperation.process("there");
      flattenOperation.process("");
      flattenOperation.process("bob");
  
      flattenOperation.finish();
  
      assertThat(receiver.outputElems, CoreMatchers.<Object>hasItems("hi", "there", "", "bob"));
  
      CounterUpdateExtractor<?> updateExtractor = Mockito.mock(CounterUpdateExtractor.class);
      counterSet.extractUpdates(false, updateExtractor);
      verify(updateExtractor).longSum(getObjectCounterName("test_receiver_out"), false, 4L);
      verify(updateExtractor)
          .longMean(
              getMeanByteCounterName("test_receiver_out"),
              false,
              LongCounterMean.ZERO.addValue(14L, 4));
      verifyNoMoreInteractions(updateExtractor);
    }
  
    @Test
    public void testFlattenOperationContext() throws Exception {
      OperationContext context = Mockito.mock(OperationContext.class);
  
      OutputReceiver receiver = Mockito.mock(OutputReceiver.class);
      FlattenOperation operation = new FlattenOperation(receiver, context);
  
      Closeable startCloseable = Mockito.mock(Closeable.class);
      Closeable processCloseable = Mockito.mock(Closeable.class);
      Closeable finishCloseable = Mockito.mock(Closeable.class);
      when(context.enterStart()).thenReturn(startCloseable);
      when(context.enterProcess()).thenReturn(processCloseable);
      when(context.enterFinish()).thenReturn(finishCloseable);
  
      operation.start();
      operation.process("hello");
      operation.finish();
  
      InOrder inOrder =
          Mockito.inOrder(receiver, context, startCloseable, processCloseable, finishCloseable);
  
      inOrder.verify(context).enterProcess();
      inOrder.verify(receiver).process("hello");
      inOrder.verify(processCloseable).close();
    }
  }
  