[−][src]Macro tokio_test::assert_ready_err
Asserts a Poll<Result<...>>
is ready and Err
, returning the error.
This will invoke panic!
if the provided Poll
does not evaluate to Poll::Ready(Err(..))
at
runtime.
Custom Messages
This macro has a second form, where a custom panic message can be provided with or without arguments for formatting.
Examples
use futures_util::future; use tokio_test::{assert_ready_err, task}; let mut fut = task::spawn(future::err::<(), _>(())); assert_ready_err!(fut.poll());