1 use tokio::net::TcpStream; 2 use tokio::sync::oneshot; 3 use tokio::time::{timeout, Duration}; 4 5 use futures::executor::block_on; 6 7 use std::net::TcpListener; 8 9 #[test] 10 #[should_panic(expected = "no timer running")] panics_when_no_timer()11fn panics_when_no_timer() { 12 block_on(timeout_value()); 13 } 14 15 #[test] 16 #[should_panic(expected = "no reactor running")] panics_when_no_reactor()17fn panics_when_no_reactor() { 18 let srv = TcpListener::bind("127.0.0.1:0").unwrap(); 19 let addr = srv.local_addr().unwrap(); 20 block_on(TcpStream::connect(&addr)).unwrap(); 21 } 22 timeout_value()23async fn timeout_value() { 24 let (_tx, rx) = oneshot::channel::<()>(); 25 let dur = Duration::from_millis(20); 26 let _ = timeout(dur, rx).await; 27 } 28