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.sdk.util.construction;
  
  import static org.hamcrest.MatcherAssert.assertThat;
  import static org.hamcrest.Matchers.equalTo;
  import static org.mockito.ArgumentMatchers.any;
  import static org.mockito.Mockito.doThrow;
  import static org.mockito.Mockito.mock;
  import static org.mockito.Mockito.when;
  
  import java.util.Map;
  import org.apache.beam.sdk.Pipeline;
  import org.apache.beam.sdk.coders.Coder;
  import org.apache.beam.sdk.options.PipelineOptions;
  import org.apache.beam.sdk.transforms.Create;
  import org.apache.beam.sdk.transforms.PTransform;
  import org.apache.beam.sdk.transforms.display.DisplayData;
  import org.apache.beam.sdk.values.PCollection;
  import org.apache.beam.sdk.values.PValue;
  import org.apache.beam.sdk.values.TupleTag;
  import org.apache.beam.sdk.values.WindowingStrategy;
  import org.apache.beam.vendor.guava.v32_1_2_jre.com.google.common.collect.ImmutableMap;
  import org.junit.Before;
  import org.junit.Rule;
  import org.junit.Test;
  import org.junit.rules.ExpectedException;
  import org.junit.runner.RunWith;
  import org.junit.runners.JUnit4;
  import org.mockito.Mock;
  import org.mockito.MockitoAnnotations;
  
  /** Tests for {@link ForwardingPTransform}. */
  @RunWith(JUnit4.class)
  public class ForwardingPTransformTest {
    @Rule public ExpectedException thrown = ExpectedException.none();
  
    @Mock private PTransform<PCollection<Integer>, PCollection<String>> delegate;
  
    private ForwardingPTransform<PCollection<Integer>, PCollection<String>> forwarding;
  
    @Before
    public void setup() {
      MockitoAnnotations.initMocks(this);
      forwarding =
          new ForwardingPTransform<PCollection<Integer>, PCollection<String>>() {
            @Override
            protected PTransform<PCollection<Integer>, PCollection<String>> delegate() {
              return delegate;
            }
          };
    }
  
    @Test
    public void applyDelegates() {
      @SuppressWarnings("unchecked")
      PCollection<Integer> collection = mock(PCollection.class);
      @SuppressWarnings("unchecked")
      PCollection<String> output = mock(PCollection.class);
      when(delegate.expand(collection)).thenReturn(output);
      PCollection<String> result = forwarding.expand(collection);
      assertThat(result, equalTo(output));
    }
  
    @Test
    public void getNameDelegates() {
      String name = "My_forwardingptransform-name;for!thisTest";
      when(delegate.getName()).thenReturn(name);
      assertThat(forwarding.getName(), equalTo(name));
    }
  
    @Test
    public void getAdditionalInputsDelegates() {
      Map<TupleTag<?>, PValue> additionalInputs =
          ImmutableMap.of(new TupleTag<>("test_tag"), Pipeline.create().apply(Create.of("1")));
      when(delegate.getAdditionalInputs()).thenReturn(additionalInputs);
      assertThat(forwarding.getAdditionalInputs(), equalTo(additionalInputs));
    }
  
    @Test
    public void validateDelegates() {
      @SuppressWarnings("unchecked")
      PipelineOptions options = mock(PipelineOptions.class);
      doThrow(RuntimeException.class).when(delegate).validate(options);
  
      thrown.expect(RuntimeException.class);
      forwarding.validate(options);
    }
  
    @Test
    public void getDefaultOutputCoderDelegates() throws Exception {
      @SuppressWarnings("unchecked")
      PCollection<Integer> input =
          PCollection.createPrimitiveOutputInternal(
              null /* pipeline */,
              WindowingStrategy.globalDefault(),
              PCollection.IsBounded.BOUNDED,
              null /* coder */);
      @SuppressWarnings("unchecked")
      PCollection<String> output =
          PCollection.createPrimitiveOutputInternal(
              null /* pipeline */,
              WindowingStrategy.globalDefault(),
              PCollection.IsBounded.BOUNDED,
              null /* coder */);
      @SuppressWarnings("unchecked")
      Coder<String> outputCoder = mock(Coder.class);
  
      when(delegate.expand(input)).thenReturn(output);
      when(delegate.getDefaultOutputCoder(input, output)).thenReturn(outputCoder);
      assertThat(forwarding.expand(input).getCoder(), equalTo(outputCoder));
    }
  
    @Test
    public void populateDisplayDataDelegates() {
      doThrow(RuntimeException.class)
          .when(delegate)
          .populateDisplayData(any(DisplayData.Builder.class));
  
      thrown.expect(RuntimeException.class);
      DisplayData.from(forwarding);
    }
  }
  