Book example not working

[bq-wrongway]

I was checking out this example https://cucumber-rs.github.io/cucumber/current/writing/scenario_outline.html

And it does not compile (well, unless i remove .await) keywords.

error[E0277]: `()` is not a future
  --> tests/example.rs:23:35
   |
23 |     sleep(Duration::from_secs(2)).await;
   |     ------------------------------^^^^^
   |     |                            ||
   |     |                            |`()` is not a future
   |     |                            help: remove the `.await`
   |     this call returns `()`
   |
   = help: the trait `futures::Future` is not implemented for `()`
   = note: () must be a future or must implement `IntoFuture` to be awaited
   = note: required for `()` to implement `std::future::IntoFuture`

Am i doing something wrong or the example is missing something ?

[ilslv]

you are probably using std::thread::sleep() instead of the tokio::time::sleep()

[tyranron]

@bq-wrongway we're sure that all the Book examples work, because we check that on CI.

What confuses you, is that the boilerplate code of examples is mostly hidden (the lines started witn #), to not overbloat them with redundant information. This is a widely used feature of rustdoc, and so, mdBook too.

To see the hidden code of an example, you may use this button in mdBook interface:

And they will be shown like this: