try {
      // We get the result, even if collectOneValue is a no-op, so that we can fail fast.
      // We use getUninterruptibly over getDone as a micro-optimization, we know the future is done.
      collectOneValue(index, getUninterruptibly(future));
    } catch (ExecutionException e) {
      handleException(e.getCause());
    } catch (Throwable t) { // sneaky checked exception

    try {
      getUninterruptibly(future);
      fail("Expected future to fail: " + future);
    } catch (ExecutionException e) {
      assertThat(e).hasCauseThat().isSameInstanceAs(exception);
    }
  }

  static void assertThatFutureBecomesCancelled(Future<?> future) throws ExecutionException {
    try {
      getUninterruptibly(future);

      return new Failure(t);
    }
  }

  /**
   * An inlined private copy of {@link Uninterruptibles#getUninterruptibly} used to break an
   * internal dependency on other /util/concurrent classes.
   */
  @ParametricNullness
  private static <V extends @Nullable Object> V getUninterruptibly(Future<V> future)
      throws ExecutionException {
    boolean interrupted = false;
    try {
      while (true) {

    try {
      getUninterruptibly(future);
      fail("Expected future to fail: " + future);
    } catch (ExecutionException e) {
      assertThat(e).hasCauseThat().isSameInstanceAs(exception);
    }
  }

  static void assertThatFutureBecomesCancelled(Future<?> future) throws ExecutionException {
    try {
      getUninterruptibly(future);

import static com.google.common.util.concurrent.Internal.toNanosSaturated;
import static com.google.common.util.concurrent.MoreExecutors.directExecutor;
import static com.google.common.util.concurrent.Uninterruptibles.getUninterruptibly;
import static java.util.Objects.requireNonNull;
import static java.util.concurrent.Executors.callable;
import static java.util.concurrent.TimeUnit.NANOSECONDS;

import com.google.common.annotations.GwtCompatible;

        };
    Set<Object> finalResults = Collections.synchronizedSet(Sets.newIdentityHashSet());
    Runnable collectResultsRunnable =
        () -> {
          try {
            String result = Uninterruptibles.getUninterruptibly(currentFuture.get());
            finalResults.add(result);
          } catch (ExecutionException e) {
            finalResults.add(e.getCause());
          } catch (CancellationException e) {

        };
    Set<Object> finalResults = Collections.synchronizedSet(Sets.newIdentityHashSet());
    Runnable collectResultsRunnable =
        () -> {
          try {
            String result = Uninterruptibles.getUninterruptibly(currentFuture.get());
            finalResults.add(result);
          } catch (ExecutionException e) {
            finalResults.add(e.getCause());
          } catch (CancellationException e) {

import static com.google.common.util.concurrent.Futures.transform;
import static com.google.common.util.concurrent.MoreExecutors.directExecutor;
import static com.google.common.util.concurrent.Uninterruptibles.getUninterruptibly;
import static java.lang.Math.min;
import static java.util.Collections.unmodifiableSet;
import static java.util.concurrent.TimeUnit.NANOSECONDS;

import com.google.common.annotations.GwtCompatible;

import static com.google.common.util.concurrent.Futures.transform;
import static com.google.common.util.concurrent.MoreExecutors.directExecutor;
import static com.google.common.util.concurrent.Uninterruptibles.getUninterruptibly;
import static java.lang.Math.min;
import static java.util.Collections.unmodifiableSet;
import static java.util.concurrent.TimeUnit.NANOSECONDS;

import com.google.common.annotations.GwtCompatible;

import static com.google.common.util.concurrent.Uninterruptibles.awaitUninterruptibly;
import static com.google.common.util.concurrent.Uninterruptibles.getUninterruptibly;
import static com.google.common.util.concurrent.testing.TestingExecutors.noOpScheduledExecutor;
import static java.util.Arrays.asList;
import static java.util.concurrent.Executors.newSingleThreadExecutor;