Function trillium_testing::with_transport

pub fn with_transport<H, Fun, Fut>(handler: H, tests: Fun)
where
    H: Handler,
    Fun: FnOnce(BoxedTransport) -> Fut,
    Fut: Future<Output = Result<(), Box<dyn Error>>>,

open an in-memory connection to this handler and call an async function with an open BoxedTransport