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use std::pin::Pin;
use std::task::{Context, Poll};
use tokio_stream::Stream;
use tokio_test::task;
/// A [`Stream`] that has a stub size hint.
struct SizedStream;
impl Stream for SizedStream {
type Item = ();
fn poll_next(self: Pin<&mut Self>, _cx: &mut Context<'_>) -> Poll<Option<Self::Item>> {
Poll::Pending
}
fn size_hint(&self) -> (usize, Option<usize>) {
(100, Some(200))
}
}
#[test]
fn test_spawn_stream_size_hint() {
let spawn = task::spawn(SizedStream);
assert_eq!(spawn.size_hint(), (100, Some(200)));
}
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