executor.execute(() -> awaitUninterruptibly(beforeFunction));

    // Cancel the future after making input available.
    inputFuture.set("value");
    future.cancel(false);

    // Unpause the executor.
    beforeFunction.countDown();
    executor.shutdown();
    assertTrue(executor.awaitTermination(5, SECONDS));

    assertFalse(functionCalled.get());
  }

    executor.execute(() -> awaitUninterruptibly(beforeFunction));

    // Cancel the future after making input available.
    inputFuture.set("value");
    future.cancel(false);

    // Unpause the executor.
    beforeFunction.countDown();
    executor.shutdown();
    assertTrue(executor.awaitTermination(5, SECONDS));

    assertFalse(functionCalled.get());
  }