1use assert_matches::assert_matches;
2use futures::executor::block_on;
3use futures::future::lazy;
4use futures::io::{AsyncWrite, Cursor};
5use futures::task::Poll;
6use std::pin::Pin;
7
8#[test]
9fn cursor_asyncwrite_vec() {
10 let mut cursor = Cursor::new(vec![0; 5]);
11 block_on(lazy(|cx| {
12 assert_matches!(Pin::new(&mut cursor).poll_write(cx, &[1, 2]), Poll::Ready(Ok(2)));
13 assert_matches!(Pin::new(&mut cursor).poll_write(cx, &[3, 4]), Poll::Ready(Ok(2)));
14 assert_matches!(Pin::new(&mut cursor).poll_write(cx, &[5, 6]), Poll::Ready(Ok(2)));
15 assert_matches!(Pin::new(&mut cursor).poll_write(cx, &[6, 7]), Poll::Ready(Ok(2)));
16 }));
17 assert_eq!(cursor.into_inner(), [1, 2, 3, 4, 5, 6, 6, 7]);
18}
19
20#[test]
21fn cursor_asyncwrite_box() {
22 let mut cursor = Cursor::new(vec![0; 5].into_boxed_slice());
23 block_on(lazy(|cx| {
24 assert_matches!(Pin::new(&mut cursor).poll_write(cx, &[1, 2]), Poll::Ready(Ok(2)));
25 assert_matches!(Pin::new(&mut cursor).poll_write(cx, &[3, 4]), Poll::Ready(Ok(2)));
26 assert_matches!(Pin::new(&mut cursor).poll_write(cx, &[5, 6]), Poll::Ready(Ok(1)));
27 assert_matches!(Pin::new(&mut cursor).poll_write(cx, &[6, 7]), Poll::Ready(Ok(0)));
28 }));
29 assert_eq!(&*cursor.into_inner(), [1, 2, 3, 4, 5]);
30}
31