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;
  
  import static org.hamcrest.MatcherAssert.assertThat;
  import static org.hamcrest.Matchers.containsInAnyOrder;
  import static org.hamcrest.Matchers.equalTo;
  
  import java.io.Serializable;
  import java.util.List;
  import org.apache.beam.runners.dataflow.PrimitiveParDoSingleFactory.ParDoSingle;
  import org.apache.beam.sdk.coders.VarIntCoder;
  import org.apache.beam.sdk.runners.AppliedPTransform;
  import org.apache.beam.sdk.runners.PTransformOverrideFactory.PTransformReplacement;
  import org.apache.beam.sdk.testing.TestPipeline;
  import org.apache.beam.sdk.transforms.Create;
  import org.apache.beam.sdk.transforms.DoFn;
  import org.apache.beam.sdk.transforms.ParDo;
  import org.apache.beam.sdk.transforms.Sum;
  import org.apache.beam.sdk.transforms.View;
  import org.apache.beam.sdk.transforms.display.DisplayData;
  import org.apache.beam.sdk.transforms.display.DisplayDataEvaluator;
  import org.apache.beam.sdk.transforms.resourcehints.ResourceHints;
  import org.apache.beam.sdk.values.PCollection;
  import org.apache.beam.sdk.values.PCollectionView;
  import org.apache.beam.sdk.values.PValues;
  import org.apache.beam.vendor.guava.v32_1_2_jre.com.google.common.collect.Iterables;
  import org.checkerframework.checker.nullness.qual.Nullable;
  import org.junit.Rule;
  import org.junit.Test;
  import org.junit.runner.RunWith;
  import org.junit.runners.JUnit4;
  
  /** Tests for {@link PrimitiveParDoSingleFactory}. */
  @RunWith(JUnit4.class)
  public class PrimitiveParDoSingleFactoryTest implements Serializable {
    // Create a pipeline for testing Side Input propagation. This won't actually run any Pipelines,
    // so disable enforcement.
    @Rule
    public transient TestPipeline pipeline =
        TestPipeline.create().enableAbandonedNodeEnforcement(false);
  
    private transient PrimitiveParDoSingleFactory<Integer, Long> factory =
        new PrimitiveParDoSingleFactory<>();
  
    /**
     * A test that demonstrates that the replacement transform has the Display Data of the {@link
     * ParDo.SingleOutput} it replaces.
     */
    @Test
    public void getReplacementTransformPopulateDisplayData() {
      ParDo.SingleOutput<Integer, Long> originalTransform = ParDo.of(new ToLongFn());
      DisplayData originalDisplayData = DisplayData.from(originalTransform);
      PCollection<? extends Integer> input = pipeline.apply(Create.of(1, 2, 3));
      AppliedPTransform<
              PCollection<? extends Integer>, PCollection<Long>, ParDo.SingleOutput<Integer, Long>>
          application =
              AppliedPTransform.of(
                  "original",
                  PValues.expandInput(input),
                  PValues.expandOutput(input.apply(originalTransform)),
                  originalTransform,
                  ResourceHints.create(),
                  pipeline);
  
      PTransformReplacement<PCollection<? extends Integer>, PCollection<Long>> replacement =
          factory.getReplacementTransform(application);
      DisplayData replacementDisplayData = DisplayData.from(replacement.getTransform());
  
      assertThat(replacementDisplayData, equalTo(originalDisplayData));
  
      DisplayData primitiveDisplayData =
          Iterables.getOnlyElement(
              DisplayDataEvaluator.create()
                  .displayDataForPrimitiveTransforms(replacement.getTransform(), VarIntCoder.of()));
      assertThat(primitiveDisplayData, equalTo(replacementDisplayData));
    }
  
    @Test
    public void getReplacementTransformGetSideInputs() {
      PCollectionView<Long> sideLong =
          pipeline
              .apply("LongSideInputVals", Create.of(-1L, -2L, -4L))
              .apply("SideLongView", Sum.longsGlobally().asSingletonView());
      PCollectionView<List<String>> sideStrings =
          pipeline
              .apply("StringSideInputVals", Create.of("foo", "bar", "baz"))
              .apply("SideStringsView", View.asList());
      ParDo.SingleOutput<Integer, Long> originalTransform =
          ParDo.of(new ToLongFn()).withSideInputs(sideLong, sideStrings);
  
      PCollection<? extends Integer> input = pipeline.apply(Create.of(1, 2, 3));
      AppliedPTransform<
              PCollection<? extends Integer>, PCollection<Long>, ParDo.SingleOutput<Integer, Long>>
          application =
              AppliedPTransform.of(
                  "original",
                  PValues.expandInput(input),
                  PValues.expandOutput(input.apply(originalTransform)),
                  originalTransform,
                  ResourceHints.create(),
                  pipeline);
  
      PTransformReplacement<PCollection<? extends Integer>, PCollection<Long>> replacementTransform =
          factory.getReplacementTransform(application);
      ParDoSingle<Integer, Long> parDoSingle =
          (ParDoSingle<Integer, Long>) replacementTransform.getTransform();
      assertThat(parDoSingle.getSideInputs().values(), containsInAnyOrder(sideStrings, sideLong));
    }
  
    @Test
    public void getReplacementTransformGetFn() {
      DoFn<Integer, Long> originalFn = new ToLongFn();
      ParDo.SingleOutput<Integer, Long> originalTransform = ParDo.of(originalFn);
      PCollection<? extends Integer> input = pipeline.apply(Create.of(1, 2, 3));
      AppliedPTransform<
              PCollection<? extends Integer>, PCollection<Long>, ParDo.SingleOutput<Integer, Long>>
          application =
              AppliedPTransform.of(
                  "original",
                  PValues.expandInput(input),
                  PValues.expandOutput(input.apply(originalTransform)),
                  originalTransform,
                  ResourceHints.create(),
                  pipeline);
  
      PTransformReplacement<PCollection<? extends Integer>, PCollection<Long>> replacementTransform =
          factory.getReplacementTransform(application);
      ParDoSingle<Integer, Long> parDoSingle =
          (ParDoSingle<Integer, Long>) replacementTransform.getTransform();
  
      assertThat(parDoSingle.getFn(), equalTo(originalTransform.getFn()));
      assertThat(parDoSingle.getFn(), equalTo(originalFn));
    }
  
    private static class ToLongFn extends DoFn<Integer, Long> {
      @ProcessElement
      public void toLong(ProcessContext ctxt) {
        ctxt.output(ctxt.element().longValue());
      }
  
      @Override
      public boolean equals(@Nullable Object other) {
        return other != null && other.getClass().equals(getClass());
      }
  
      @Override
      public int hashCode() {
        return getClass().hashCode();
      }
    }
  }
  