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.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.ArgumentMatchers.anyBoolean;
  import static org.mockito.ArgumentMatchers.eq;
  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 ParDoOperation. */
  @RunWith(JUnit4.class)
  @SuppressWarnings("unchecked")
  public class ParDoOperationTest {
  
    private CounterSet counterSet = new CounterSet();
    private OperationContext context =
        TestOperationContext.create(
            counterSet,
            NameContext.create("test", "ParDoOperation", "ParDoOperation", "ParDoOperation"));
  
    private static class TestParDoFn implements ParDoFn {
      final OutputReceiver outputReceiver;
  
      public TestParDoFn(OutputReceiver outputReceiver) {
        this.outputReceiver = outputReceiver;
      }
  
      @Override
      public void startBundle(final Receiver... receivers) throws Exception {
        if (receivers.length != 1) {
          throw new AssertionError("unexpected number of receivers for DoFn");
        }
  
        outputReceiver.process("x-start");
      }
  
      @Override
      public void processElement(Object elem) throws Exception {
        outputReceiver.process("y-" + elem);
      }
  
      @Override
      public void processTimers() throws Exception {
        outputReceiver.process("t-timers");
      }
  
      @Override
      public void finishBundle() throws Exception {
        outputReceiver.process("z-finish");
      }
  
      @Override
      public void abort() throws Exception {
        outputReceiver.process("a-aborted");
      }
    }
  
    @Test
    public void testRunParDoOperation() throws Exception {
      TestOutputReceiver receiver =
          new TestOutputReceiver(
              counterSet,
              NameContext.create("test", "test_receiver", "test_receiver", "test_receiver"));
  
      ParDoOperation parDoOperation =
          new ParDoOperation(new TestParDoFn(receiver), new OutputReceiver[] {receiver}, context);
  
      parDoOperation.start();
  
      parDoOperation.process("hi");
      parDoOperation.process("there");
      parDoOperation.process("");
      parDoOperation.process("bob");
  
      parDoOperation.finish();
  
      parDoOperation.abort();
  
      assertThat(
          receiver.outputElems,
          CoreMatchers.<Object>hasItems(
              "x-start", "y-hi", "y-there", "y-", "y-bob", "z-finish", "a-aborted"));
  
      CounterUpdateExtractor<?> updateExtractor = Mockito.mock(CounterUpdateExtractor.class);
      counterSet.extractUpdates(false, updateExtractor);
      verify(updateExtractor)
          .longSum(eq(getObjectCounterName("test_receiver_out")), anyBoolean(), eq(8L));
      verify(updateExtractor)
          .longMean(
              eq(getMeanByteCounterName("test_receiver_out")),
              anyBoolean(),
              eq(LongCounterMean.ZERO.addValue(58L, 8)));
      verifyNoMoreInteractions(updateExtractor);
    }
  
    // TODO: Test side inputs.
    // TODO: Test side outputs.
  
    @Test
    public void testParDoOperationContext() throws Exception {
      ParDoFn fn = Mockito.mock(ParDoFn.class);
      OperationContext context = Mockito.mock(OperationContext.class);
  
      OutputReceiver[] receivers = {};
      ParDoOperation operation = new ParDoOperation(fn, receivers, context);
  
      Closeable startCloseable = Mockito.mock(Closeable.class);
      Closeable processCloseable = Mockito.mock(Closeable.class);
      Closeable processTimersCloseable = Mockito.mock(Closeable.class);
      Closeable finishCloseable = Mockito.mock(Closeable.class);
      when(context.enterStart()).thenReturn(startCloseable);
      when(context.enterProcess()).thenReturn(processCloseable);
      when(context.enterProcessTimers()).thenReturn(processTimersCloseable);
      when(context.enterFinish()).thenReturn(finishCloseable);
  
      operation.start();
      operation.process("hello");
      operation.finish();
  
      InOrder inOrder =
          Mockito.inOrder(
              fn, context, startCloseable, processCloseable, processTimersCloseable, finishCloseable);
  
      inOrder.verify(context).enterStart();
      inOrder.verify(fn).startBundle(receivers);
      inOrder.verify(startCloseable).close();
      inOrder.verify(context).enterProcess();
      inOrder.verify(fn).processElement("hello");
      inOrder.verify(processCloseable).close();
      inOrder.verify(context).enterProcessTimers();
      inOrder.verify(fn).processTimers();
      inOrder.verify(processTimersCloseable).close();
      inOrder.verify(context).enterFinish();
      inOrder.verify(fn).finishBundle();
      inOrder.verify(finishCloseable).close();
    }
  }
  