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use tokio::sync::oneshot;
use tokio_test::{assert_pending, assert_ready, task};
#[tokio::test]
async fn sync_one_lit_expr_comma() {
let foo = tokio::join!(async { 1 },);
assert_eq!(foo, (1,));
}
#[tokio::test]
async fn sync_one_lit_expr_no_comma() {
let foo = tokio::join!(async { 1 });
assert_eq!(foo, (1,));
}
#[tokio::test]
async fn sync_two_lit_expr_comma() {
let foo = tokio::join!(async { 1 }, async { 2 },);
assert_eq!(foo, (1, 2));
}
#[tokio::test]
async fn sync_two_lit_expr_no_comma() {
let foo = tokio::join!(async { 1 }, async { 2 });
assert_eq!(foo, (1, 2));
}
#[tokio::test]
async fn two_await() {
let (tx1, rx1) = oneshot::channel::<&str>();
let (tx2, rx2) = oneshot::channel::<u32>();
let mut join = task::spawn(async {
tokio::join!(async { rx1.await.unwrap() }, async { rx2.await.unwrap() })
});
assert_pending!(join.poll());
tx2.send(123).unwrap();
assert!(join.is_woken());
assert_pending!(join.poll());
tx1.send("hello").unwrap();
assert!(join.is_woken());
let res = assert_ready!(join.poll());
assert_eq!(("hello", 123), res);
}
#[test]
fn join_size() {
use futures::future;
use std::mem;
let fut = async {
let ready = future::ready(0i32);
tokio::join!(ready)
};
assert_eq!(mem::size_of_val(&fut), 16);
let fut = async {
let ready1 = future::ready(0i32);
let ready2 = future::ready(0i32);
tokio::join!(ready1, ready2)
};
assert_eq!(mem::size_of_val(&fut), 28);
}
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