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use futures::executor::block_on;
use futures::future::{Future, FutureExt};
use futures::io::{AsyncBufReadExt, Cursor};
use futures::stream::{self, StreamExt, TryStreamExt};
use futures::task::Poll;
use futures_test::io::AsyncReadTestExt;
use futures_test::task::noop_context;
fn run<F: Future + Unpin>(mut f: F) -> F::Output {
let mut cx = noop_context();
loop {
if let Poll::Ready(x) = f.poll_unpin(&mut cx) {
return x;
}
}
}
macro_rules! block_on_next {
($expr:expr) => {
block_on($expr.next()).unwrap().unwrap()
};
}
macro_rules! run_next {
($expr:expr) => {
run($expr.next()).unwrap().unwrap()
};
}
#[test]
fn lines() {
let buf = Cursor::new(&b"12\r"[..]);
let mut s = buf.lines();
assert_eq!(block_on_next!(s), "12\r".to_string());
assert!(block_on(s.next()).is_none());
let buf = Cursor::new(&b"12\r\n\n"[..]);
let mut s = buf.lines();
assert_eq!(block_on_next!(s), "12".to_string());
assert_eq!(block_on_next!(s), "".to_string());
assert!(block_on(s.next()).is_none());
}
#[test]
fn maybe_pending() {
let buf =
stream::iter(vec![&b"12"[..], &b"\r"[..]]).map(Ok).into_async_read().interleave_pending();
let mut s = buf.lines();
assert_eq!(run_next!(s), "12\r".to_string());
assert!(run(s.next()).is_none());
let buf = stream::iter(vec![&b"12"[..], &b"\r\n"[..], &b"\n"[..]])
.map(Ok)
.into_async_read()
.interleave_pending();
let mut s = buf.lines();
assert_eq!(run_next!(s), "12".to_string());
assert_eq!(run_next!(s), "".to_string());
assert!(run(s.next()).is_none());
}
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