1 #![allow(clippy::blacklisted_name)]
2 use tokio::sync::oneshot;
3 use tokio_test::{assert_pending, assert_ready, task};
4
5 #[tokio::test]
sync_one_lit_expr_comma()6 async fn sync_one_lit_expr_comma() {
7 let foo = tokio::try_join!(async { ok(1) },);
8
9 assert_eq!(foo, Ok((1,)));
10 }
11
12 #[tokio::test]
sync_one_lit_expr_no_comma()13 async fn sync_one_lit_expr_no_comma() {
14 let foo = tokio::try_join!(async { ok(1) });
15
16 assert_eq!(foo, Ok((1,)));
17 }
18
19 #[tokio::test]
sync_two_lit_expr_comma()20 async fn sync_two_lit_expr_comma() {
21 let foo = tokio::try_join!(async { ok(1) }, async { ok(2) },);
22
23 assert_eq!(foo, Ok((1, 2)));
24 }
25
26 #[tokio::test]
sync_two_lit_expr_no_comma()27 async fn sync_two_lit_expr_no_comma() {
28 let foo = tokio::try_join!(async { ok(1) }, async { ok(2) });
29
30 assert_eq!(foo, Ok((1, 2)));
31 }
32
33 #[tokio::test]
two_await()34 async fn two_await() {
35 let (tx1, rx1) = oneshot::channel::<&str>();
36 let (tx2, rx2) = oneshot::channel::<u32>();
37
38 let mut join =
39 task::spawn(async { tokio::try_join!(async { rx1.await }, async { rx2.await }) });
40
41 assert_pending!(join.poll());
42
43 tx2.send(123).unwrap();
44 assert!(join.is_woken());
45 assert_pending!(join.poll());
46
47 tx1.send("hello").unwrap();
48 assert!(join.is_woken());
49 let res: Result<(&str, u32), _> = assert_ready!(join.poll());
50
51 assert_eq!(Ok(("hello", 123)), res);
52 }
53
54 #[tokio::test]
err_abort_early()55 async fn err_abort_early() {
56 let (tx1, rx1) = oneshot::channel::<&str>();
57 let (tx2, rx2) = oneshot::channel::<u32>();
58 let (_tx3, rx3) = oneshot::channel::<u32>();
59
60 let mut join = task::spawn(async {
61 tokio::try_join!(async { rx1.await }, async { rx2.await }, async {
62 rx3.await
63 })
64 });
65
66 assert_pending!(join.poll());
67
68 tx2.send(123).unwrap();
69 assert!(join.is_woken());
70 assert_pending!(join.poll());
71
72 drop(tx1);
73 assert!(join.is_woken());
74
75 let res = assert_ready!(join.poll());
76
77 assert!(res.is_err());
78 }
79
80 #[test]
join_size()81 fn join_size() {
82 use futures::future;
83 use std::mem;
84
85 let fut = async {
86 let ready = future::ready(ok(0i32));
87 tokio::try_join!(ready)
88 };
89 assert_eq!(mem::size_of_val(&fut), 16);
90
91 let fut = async {
92 let ready1 = future::ready(ok(0i32));
93 let ready2 = future::ready(ok(0i32));
94 tokio::try_join!(ready1, ready2)
95 };
96 assert_eq!(mem::size_of_val(&fut), 28);
97 }
98
ok<T>(val: T) -> Result<T, ()>99 fn ok<T>(val: T) -> Result<T, ()> {
100 Ok(val)
101 }
102