| use tokio::stream::{self, Stream, StreamExt}; | |
| #[tokio::test] | |
| async fn basic_usage() { | |
| let mut one = stream::once(1); | |
| assert_eq!(one.size_hint(), (1, Some(1))); | |
| assert_eq!(Some(1), one.next().await); | |
| assert_eq!(one.size_hint(), (0, Some(0))); | |
| assert_eq!(None, one.next().await); | |
| } |