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
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  package org.apache.beam.runners.direct;
  
  import static org.hamcrest.MatcherAssert.assertThat;
  
  import org.apache.beam.sdk.coders.KvCoder;
  import org.apache.beam.sdk.coders.StringUtf8Coder;
  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.GroupByKey;
  import org.apache.beam.sdk.values.KV;
  import org.apache.beam.sdk.values.PCollection;
  import org.hamcrest.Matchers;
  import org.junit.Test;
  import org.junit.runner.RunWith;
  import org.junit.runners.JUnit4;
  
  /** Tests for {@link DirectGBKIntoKeyedWorkItemsOverrideFactory}. */
  @RunWith(JUnit4.class)
  public class DirectGroupByKeyOverrideFactoryTest {
    private DirectGroupByKeyOverrideFactory<String, Integer> factory =
        new DirectGroupByKeyOverrideFactory<>();
  
    @Test
    public void getInputSucceeds() {
      TestPipeline p = TestPipeline.create();
      PCollection<KV<String, Integer>> input =
          p.apply(
              Create.of(KV.of("foo", 1))
                  .withCoder(KvCoder.of(StringUtf8Coder.of(), VarIntCoder.of())));
      PCollection<KV<String, Iterable<Integer>>> grouped = input.apply(GroupByKey.create());
      AppliedPTransform<?, ?, ?> producer = DirectGraphs.getProducer(grouped);
      PTransformReplacement<
              PCollection<KV<String, Integer>>, PCollection<KV<String, Iterable<Integer>>>>
          replacement = factory.getReplacementTransform((AppliedPTransform) producer);
      assertThat(replacement.getInput(), Matchers.<PCollection<?>>equalTo(input));
    }
  }
  