functionBlocking.await();
                return immediateFuture(null);
              }
            });

    ExecutorService executor = Executors.newSingleThreadExecutor();
    try {
      ListenableFuture<?> output =
          Futures.transformAsync(immediateFuture(null), function, executor);
      functionCalled.await();
      assertThat(output.toString()).contains(function.toString());

        doneSignal.countDown();
      }
    }.start();

    try {
      computingSignal.await();
    } catch (InterruptedException e) {
      throw new RuntimeException(e);
    }

    map.put(one, two);
    assertSame(two, map.get(one));
    startSignal.countDown();

    try {
      doneSignal.await();
    } catch (InterruptedException e) {
      throw new RuntimeException(e);
    }

        doneSignal.countDown();
      }
    }.start();

    try {
      computingSignal.await();
    } catch (InterruptedException e) {
      throw new RuntimeException(e);
    }

    map.put(one, two);
    assertSame(two, map.get(one));
    startSignal.countDown();

    try {
      doneSignal.await();
    } catch (InterruptedException e) {
      throw new RuntimeException(e);
    }

                functionBlocking.await();
                return immediateFuture(null);
              }
            });

    ExecutorService executor = Executors.newSingleThreadExecutor();
    try {
      ListenableFuture<?> output =
          Futures.transformAsync(immediateFuture(null), function, executor);
      functionCalled.await();
      assertThat(output.toString()).contains(function.toString());