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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.junit.Assert.assertEquals;
  import static org.junit.Assert.assertNotSame;
  import static org.junit.Assert.assertSame;
  
  import java.io.Closeable;
  import java.io.IOException;
  import org.apache.beam.runners.dataflow.internal.IsmFormat.IsmRecordCoder;
  import org.apache.beam.runners.dataflow.options.DataflowPipelineOptions;
  import org.apache.beam.runners.dataflow.util.CloudObject;
  import org.apache.beam.runners.dataflow.util.PropertyNames;
  import org.apache.beam.runners.dataflow.worker.DataflowOperationContext.DataflowExecutionState;
  import org.apache.beam.runners.dataflow.worker.profiler.ScopedProfiler.NoopProfileScope;
  import org.apache.beam.runners.dataflow.worker.util.WorkerPropertyNames;
  import org.apache.beam.sdk.coders.Coder;
  import org.apache.beam.sdk.coders.StringUtf8Coder;
  import org.apache.beam.sdk.coders.VarLongCoder;
  import org.apache.beam.sdk.io.FileSystems;
  import org.apache.beam.sdk.io.fs.ResourceId;
  import org.apache.beam.sdk.options.PipelineOptionsFactory;
  import org.apache.beam.sdk.transforms.windowing.GlobalWindow;
  import org.apache.beam.sdk.values.WindowedValues;
  import org.apache.beam.sdk.values.WindowedValues.WindowedValueCoder;
  import org.apache.beam.vendor.guava.v32_1_2_jre.com.google.common.collect.ImmutableList;
  import org.apache.beam.vendor.guava.v32_1_2_jre.com.google.common.collect.ImmutableMap;
  import org.junit.After;
  import org.junit.Before;
  import org.junit.Rule;
  import org.junit.Test;
  import org.junit.rules.TemporaryFolder;
  import org.junit.runner.RunWith;
  import org.junit.runners.JUnit4;
  
  /** Tests for {@link IsmReaderFactory}. */
  @RunWith(JUnit4.class)
  public class IsmReaderFactoryTest {
    private DataflowPipelineOptions options;
    private BatchModeExecutionContext executionContext;
    private Closeable stateCloseable;
    private DataflowOperationContext operationContext;
  
    @Rule public TemporaryFolder tmpFolder = new TemporaryFolder();
  
    @Before
    public void setUp() {
      options = PipelineOptionsFactory.as(DataflowPipelineOptions.class);
  
      executionContext =
          BatchModeExecutionContext.forTesting(
              PipelineOptionsFactory.as(DataflowPipelineOptions.class),
              NameContextsForTests.nameContextForTest().stageName());
  
      DataflowExecutionState state =
          executionContext
              .getExecutionStateRegistry()
              .getState(
                  NameContextsForTests.nameContextForTest(),
                  "test",
                  null /*container */,
                  NoopProfileScope.NOOP);
  
      operationContext =
          executionContext.createOperationContext(NameContextsForTests.nameContextForTest());
      stateCloseable = executionContext.getExecutionStateTracker().enterState(state);
    }
  
    @After
    public void tearDown() throws IOException {
      stateCloseable.close();
    }
  
    @Test
    public void testFactory() throws Exception {
      WindowedValueCoder<?> coder =
          WindowedValues.getFullCoder(
              IsmRecordCoder.of(
                  1, 0, ImmutableList.<Coder<?>>of(StringUtf8Coder.of()), VarLongCoder.of()),
              GlobalWindow.Coder.INSTANCE);
  
      String tmpFile = tmpFolder.newFile().getPath();
      ResourceId tmpResourceId = FileSystems.matchSingleFileSpec(tmpFile).resourceId();
      @SuppressWarnings("rawtypes")
      IsmReader<?> ismReader =
          (IsmReader)
              new IsmReaderFactory()
                  .create(
                      createSpecForFilename(tmpFile),
                      coder,
                      options,
                      executionContext,
                      operationContext);
      assertEquals(coder.getValueCoder(), ismReader.getCoder());
      assertEquals(tmpResourceId, ismReader.getResourceId());
    }
  
    @Test
    public void testFactoryReturnsCachedInstance() throws Exception {
      Coder<?> coder =
          WindowedValues.getFullCoder(
              IsmRecordCoder.of(
                  1, 0, ImmutableList.<Coder<?>>of(StringUtf8Coder.of()), VarLongCoder.of()),
              GlobalWindow.Coder.INSTANCE);
  
      String tmpFile = tmpFolder.newFile().getPath();
      String anotherTmpFile = tmpFolder.newFile().getPath();
  
      @SuppressWarnings("rawtypes")
      IsmReader<?> ismReader =
          (IsmReader)
              new IsmReaderFactory()
                  .create(
                      createSpecForFilename(tmpFile),
                      coder,
                      options,
                      executionContext,
                      operationContext);
      assertSame(
          ismReader,
          new IsmReaderFactory()
              .create(
                  createSpecForFilename(tmpFile),
                  coder,
                  options,
                  executionContext,
                  operationContext));
      assertNotSame(
          ismReader,
          new IsmReaderFactory()
              .create(
                  createSpecForFilename(anotherTmpFile),
                  coder,
                  options,
                  executionContext,
                  operationContext));
    }
  
    private CloudObject createSpecForFilename(String filename) {
      return CloudObject.fromSpec(
          ImmutableMap.<String, Object>of(
              PropertyNames.OBJECT_TYPE_NAME, "IsmSource", WorkerPropertyNames.FILENAME, filename));
    }
  }
  