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.apache.beam.runners.dataflow.util.Structs.addLong;
  import static org.apache.beam.runners.dataflow.util.Structs.addStringList;
  import static org.hamcrest.MatcherAssert.assertThat;
  
  import com.google.api.services.dataflow.model.Source;
  import java.util.Arrays;
  import java.util.List;
  import org.apache.beam.runners.dataflow.util.CloudObject;
  import org.apache.beam.runners.dataflow.util.CloudObjects;
  import org.apache.beam.runners.dataflow.worker.util.WorkerPropertyNames;
  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.coders.StringUtf8Coder;
  import org.apache.beam.sdk.options.PipelineOptionsFactory;
  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 InMemoryReaderFactory. */
  @RunWith(JUnit4.class)
  public class InMemoryReaderFactoryTest {
    static <T> Source createInMemoryCloudSource(
        List<T> elements, Long start, Long end, Coder<T> coder) throws Exception {
      List<String> encodedElements = InMemoryReaderTest.encodedElements(elements, coder);
  
      CloudObject spec = CloudObject.forClassName("InMemorySource");
      addStringList(spec, WorkerPropertyNames.ELEMENTS, encodedElements);
  
      if (start != null) {
        addLong(spec, WorkerPropertyNames.START_INDEX, start);
      }
      if (end != null) {
        addLong(spec, WorkerPropertyNames.END_INDEX, end);
      }
  
      Source cloudSource = new Source();
      cloudSource.setSpec(spec);
      cloudSource.setCodec(CloudObjects.asCloudObject(coder, /*sdkComponents=*/ null));
  
      return cloudSource;
    }
  
    <T> void runTestCreateInMemoryReader(
        List<T> elements, Long start, Long end, int expectedStart, int expectedEnd, Coder<T> coder)
        throws Exception {
      Source cloudSource = createInMemoryCloudSource(elements, start, end, coder);
  
      NativeReader<?> reader =
          ReaderRegistry.defaultRegistry()
              .create(
                  cloudSource,
                  PipelineOptionsFactory.create(),
                  BatchModeExecutionContext.forTesting(PipelineOptionsFactory.create(), "testStage"),
                  TestOperationContext.create());
      assertThat(reader, new IsInstanceOf(InMemoryReader.class));
      InMemoryReader<?> inMemoryReader = (InMemoryReader<?>) reader;
      Assert.assertEquals(
          InMemoryReaderTest.encodedElements(elements, coder), inMemoryReader.encodedElements);
      Assert.assertEquals(expectedStart, inMemoryReader.startIndex);
      Assert.assertEquals(expectedEnd, inMemoryReader.endIndex);
      Assert.assertEquals(coder, inMemoryReader.coder);
    }
  
    @Test
    public void testCreatePlainInMemoryReader() throws Exception {
      runTestCreateInMemoryReader(
          Arrays.asList("hi", "there", "bob"), null, null, 0, 3, StringUtf8Coder.of());
    }
  
    @Test
    public void testCreateRichInMemoryReader() throws Exception {
      runTestCreateInMemoryReader(
          Arrays.asList(33, 44, 55, 66, 77, 88), 1L, 3L, 1, 3, BigEndianIntegerCoder.of());
    }
  }
  