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#![warn(rust_2018_idioms)]
use tokio::runtime::Runtime;
use tokio::sync::oneshot;
use tokio_test::{assert_err, assert_ok};
use std::thread;
use std::time::Duration;
#[test]
fn spawned_task_does_not_progress_without_block_on() {
let (tx, mut rx) = oneshot::channel();
let mut rt = rt();
rt.spawn(async move {
assert_ok!(tx.send("hello"));
});
thread::sleep(Duration::from_millis(50));
assert_err!(rx.try_recv());
let out = rt.block_on(async { assert_ok!(rx.await) });
assert_eq!(out, "hello");
}
fn rt() -> Runtime {
tokio::runtime::Builder::new()
.current_thread()
.build()
.unwrap()
}
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