fail();
    } catch (CancellationException expected) {
    }
    // TODO(cpovirk): implement interruption, updating this test:
    // https://github.com/google/guava/issues/1989
    assertEquals(1, gotException.getCount());
    // gotException.await();
  }

  public void testTransformAsync_cancelPropagatesToAsyncOutput() throws Exception {
    ListenableFuture<Foo> immediate = immediateFuture(new Foo());

      fail();
    } catch (CancellationException expected) {
    }
    // TODO(cpovirk): implement interruption, updating this test:
    // https://github.com/google/guava/issues/1989
    assertEquals(1, gotException.getCount());
    // gotException.await();
  }

  public void testTransformAsync_cancelPropagatesToAsyncOutput() throws Exception {
    ListenableFuture<Foo> immediate = immediateFuture(new Foo());

            @Override
            @ParametricNullness
            public K getElement() {
              return backingEntry.getKey();
            }

            @Override
            public int getCount() {
              return backingEntry.getValue().size();
            }
          };
        }
      };
    }

    @Override
    int distinctElements() {

            @Override
            @ParametricNullness
            public K getElement() {
              return backingEntry.getKey();
            }

            @Override
            public int getCount() {
              return backingEntry.getValue().size();
            }
          };
        }
      };
    }

    @Override
    public Spliterator<K> spliterator() {