@Override
  public <T> TransformEvaluator<T> forApplication(
      AppliedPTransform<?, ?, ?> application, CommittedBundle<?> inputBundle) {
    @SuppressWarnings({"cast", "unchecked", "rawtypes"})
    TransformEvaluator<T> evaluator = createEvaluator((AppliedPTransform) application);
    return evaluator;
  }
@Test
  public void testInMemoryEvaluator() throws Exception {
    PCollection<String> input = p.apply(Create.of("foo", "bar"));
    PCollectionView<Iterable<String>> pCollectionView = input.apply(View.asIterable());
    PCollection<Iterable<String>> concat =
        input
            .apply(WithKeys.of((Void) null))
            .setCoder(KvCoder.of(VoidCoder.of(), StringUtf8Coder.of()))
            .apply(GroupByKey.create())
            .apply(Values.create());
    PCollection<Iterable<String>> view =
        concat.apply(new DirectWriteViewVisitor.WriteView<>(pCollectionView));

    EvaluationContext context = mock(EvaluationContext.class);
    TestViewWriter<String, Iterable<String>> viewWriter = new TestViewWriter<>();
    when(context.createPCollectionViewWriter(concat, pCollectionView)).thenReturn(viewWriter);

    CommittedBundle<String> inputBundle = bundleFactory.createBundle(input).commit(Instant.now());
    AppliedPTransform<?, ?, ?> producer = DirectGraphs.getProducer(view);
    TransformEvaluator<Iterable<String>> evaluator =
        new ViewEvaluatorFactory(context).forApplication(producer, inputBundle);

    evaluator.processElement(WindowedValue.valueInGlobalWindow(ImmutableList.of("foo", "bar")));
    assertThat(viewWriter.latest, nullValue());

    evaluator.finishBundle();
    assertThat(
        viewWriter.latest,
        containsInAnyOrder(
            WindowedValue.valueInGlobalWindow("foo"), WindowedValue.valueInGlobalWindow("bar")));
  }