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;
  
  import static org.junit.Assert.assertEquals;
  import static org.junit.Assert.assertFalse;
  
  import java.io.IOException;
  import java.util.ArrayList;
  import java.util.Arrays;
  import java.util.List;
  import org.apache.beam.runners.dataflow.worker.windmill.Windmill;
  import org.apache.beam.sdk.values.WindowedValue;
  import org.apache.beam.sdk.values.WindowedValues;
  import org.apache.beam.vendor.grpc.v1p69p0.com.google.protobuf.ByteString;
  import org.junit.Test;
  import org.junit.runner.RunWith;
  import org.junit.runners.JUnit4;
  
  /** Tests for {@link WindmillReaderIteratorBase}. */
  @RunWith(JUnit4.class)
  public class WindmillReaderIteratorBaseTest {
    private static class TestWindmillReaderIterator extends WindmillReaderIteratorBase<Long> {
      protected TestWindmillReaderIterator(Windmill.WorkItem work) {
        super(work);
      }
  
      @Override
      protected WindowedValue<Long> decodeMessage(Windmill.Message message) {
        return WindowedValues.valueInGlobalWindow(message.getTimestamp());
      }
    }
  
    @Test
    public void testBasic() throws IOException {
      testForMessageBundleCounts();
      testForMessageBundleCounts(0);
      testForMessageBundleCounts(0, 0);
      testForMessageBundleCounts(1);
      testForMessageBundleCounts(2);
      testForMessageBundleCounts(1, 1);
      testForMessageBundleCounts(0, 1);
      testForMessageBundleCounts(1, 0);
      testForMessageBundleCounts(0, 0, 1, 3, 0, 1, 0, 0, 0, 1);
      testForMessageBundleCounts(0, 0, 1, 3, 0, 1, 0, 0, 0, 0);
    }
  
    private void testForMessageBundleCounts(int... messageBundleCounts) throws IOException {
      List<Windmill.InputMessageBundle> bundles = new ArrayList<>();
      long numTotalMessages = 0;
      for (int count : messageBundleCounts) {
        Windmill.InputMessageBundle.Builder bundle =
            Windmill.InputMessageBundle.newBuilder().setSourceComputationId("foo");
        for (int i = 0; i < count; ++i) {
          bundle.addMessages(
              Windmill.Message.newBuilder()
                  .setTimestamp(numTotalMessages++)
                  .setData(ByteString.EMPTY)
                  .build());
        }
        bundles.add(bundle.build());
      }
      Windmill.WorkItem workItem =
          Windmill.WorkItem.newBuilder()
              .setKey(ByteString.EMPTY)
              .setWorkToken(0L)
              .addAllMessageBundles(bundles)
              .build();
      try (TestWindmillReaderIterator iter = new TestWindmillReaderIterator(workItem)) {
        List<Long> actual =
            ReaderTestUtils.windowedValuesToValues(
                ReaderUtils.readRemainingFromIterator(iter, false));
        assertFalse(iter.advance());
        List<Long> expected = new ArrayList<>();
        for (int i = 0; i < numTotalMessages; ++i) {
          expected.add((long) i);
        }
        assertEquals(Arrays.toString(messageBundleCounts), expected, actual);
      }
    }
  }
  