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   * 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.apache.beam.runners.dataflow.util.Structs.addLong;
  import static org.apache.beam.runners.dataflow.util.Structs.addString;
  import static org.hamcrest.MatcherAssert.assertThat;
  
  import com.google.api.services.dataflow.model.Source;
  import org.apache.beam.runners.dataflow.util.CloudObject;
  import org.apache.beam.runners.dataflow.util.CloudObjects;
  import org.apache.beam.runners.dataflow.worker.util.common.worker.NativeReader;
  import org.apache.beam.sdk.coders.BigEndianIntegerCoder;
  import org.apache.beam.sdk.coders.Coder;
  import org.apache.beam.sdk.options.PipelineOptionsFactory;
  import org.apache.beam.sdk.transforms.windowing.GlobalWindow;
  import org.apache.beam.sdk.values.WindowedValues;
  import org.checkerframework.checker.nullness.qual.Nullable;
  import org.hamcrest.core.IsInstanceOf;
  import org.junit.Assert;
  import org.junit.Test;
  import org.junit.runner.RunWith;
  import org.junit.runners.JUnit4;
  
  /** Tests for {@link AvroByteReaderFactory}. */
  @RunWith(JUnit4.class)
  @SuppressWarnings({
    "rawtypes", // TODO(https://github.com/apache/beam/issues/20447)
  })
  public class AvroByteReaderFactoryTest {
    private final String pathToAvroFile = "/path/to/file.avro";
  
    NativeReader<?> runTestCreateAvroReader(
        String filename, @Nullable Long start, @Nullable Long end, CloudObject encoding)
        throws Exception {
      CloudObject spec = CloudObject.forClassName("AvroSource");
      addString(spec, "filename", filename);
      if (start != null) {
        addLong(spec, "start_offset", start);
      }
      if (end != null) {
        addLong(spec, "end_offset", end);
      }
  
      Source cloudSource = new Source();
      cloudSource.setSpec(spec);
      cloudSource.setCodec(encoding);
  
      NativeReader<?> reader =
          ReaderRegistry.defaultRegistry()
              .create(
                  cloudSource,
                  PipelineOptionsFactory.create(),
                  null, // ExecutionContext
                  null);
      return reader;
    }
  
    @Test
    public void testCreatePlainAvroByteReader() throws Exception {
      Coder<?> coder =
          WindowedValues.getFullCoder(BigEndianIntegerCoder.of(), GlobalWindow.Coder.INSTANCE);
      NativeReader<?> reader =
          runTestCreateAvroReader(
              pathToAvroFile, null, null, CloudObjects.asCloudObject(coder, /*sdkComponents=*/ null));
  
      assertThat(reader, new IsInstanceOf(AvroByteReader.class));
      AvroByteReader avroReader = (AvroByteReader) reader;
      Assert.assertEquals(pathToAvroFile, avroReader.avroSource.getFileOrPatternSpec());
      Assert.assertEquals(0L, avroReader.startPosition);
      Assert.assertEquals(Long.MAX_VALUE, avroReader.endPosition);
      Assert.assertEquals(coder, avroReader.coder);
    }
  
    @Test
    public void testCreateRichAvroByteReader() throws Exception {
      Coder<?> coder =
          WindowedValues.getFullCoder(BigEndianIntegerCoder.of(), GlobalWindow.Coder.INSTANCE);
      NativeReader<?> reader =
          runTestCreateAvroReader(
              pathToAvroFile, 200L, 500L, CloudObjects.asCloudObject(coder, /*sdkComponents=*/ null));
  
      assertThat(reader, new IsInstanceOf(AvroByteReader.class));
      AvroByteReader avroReader = (AvroByteReader) reader;
      Assert.assertEquals(pathToAvroFile, avroReader.avroSource.getFileOrPatternSpec());
      Assert.assertEquals(200L, avroReader.startPosition);
      Assert.assertEquals(500L, avroReader.endPosition);
      Assert.assertEquals(coder, avroReader.coder);
    }
  }
  