}
            },
            executor);
    closingFuture.finishToValueAndCloser(
        new NoOpValueAndCloserConsumer<>(), finishToValueAndCloserExecutor);
    assertThrows(
        IllegalStateException.class,
        () ->
            closingFuture.finishToValueAndCloser(
                new NoOpValueAndCloserConsumer<>(), finishToValueAndCloserExecutor));
  }

              }
            },
            executor);
    closingFuture.finishToValueAndCloser(
        new NoOpValueAndCloserConsumer<>(), finishToValueAndCloserExecutor);
    assertThrows(
        IllegalStateException.class,
        () ->
            closingFuture.finishToValueAndCloser(
                new NoOpValueAndCloserConsumer<>(), finishToValueAndCloserExecutor));
  }

                return closer.eventuallyClose(mockCloseable, executor);
              }
            },
            executor);
    closingFuture.finishToValueAndCloser(new NoOpValueAndCloserConsumer<>(), directExecutor());
    assertThrows(
        IllegalStateException.class,
        () -> {
          FluentFuture<Closeable> unused = closingFuture.finishToFuture();
        });
  }