85 lines
2.2 KiB
Rust
85 lines
2.2 KiB
Rust
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use futures::executor::block_on;
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use futures::future::{Future, FutureExt};
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use futures::io::{AsyncBufReadExt, AsyncRead, Cursor};
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use futures::stream::{self, StreamExt, TryStreamExt};
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use futures::task::Poll;
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use futures_test::io::AsyncReadTestExt;
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use futures_test::task::noop_context;
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fn run<F: Future + Unpin>(mut f: F) -> F::Output {
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let mut cx = noop_context();
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loop {
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if let Poll::Ready(x) = f.poll_unpin(&mut cx) {
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return x;
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}
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}
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}
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macro_rules! block_on_next {
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($expr:expr) => {
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block_on($expr.next()).unwrap().unwrap()
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};
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}
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macro_rules! run_next {
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($expr:expr) => {
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run($expr.next()).unwrap().unwrap()
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};
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}
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struct IOErrorRead(bool);
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impl AsyncRead for IOErrorRead {
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fn poll_read(
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mut self: std::pin::Pin<&mut Self>,
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_cx: &mut std::task::Context<'_>,
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b: &mut [u8],
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) -> Poll<std::io::Result<usize>> {
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if self.0 {
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Poll::Ready(Err(std::io::ErrorKind::InvalidInput.into()))
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} else {
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self.0 = true;
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b[..16].fill(b'x');
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Ok(16).into()
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}
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}
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}
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#[test]
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fn lines() {
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let buf = Cursor::new(&b"12\r"[..]);
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let mut s = buf.lines();
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assert_eq!(block_on_next!(s), "12\r".to_string());
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assert!(block_on(s.next()).is_none());
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let buf = Cursor::new(&b"12\r\n\n"[..]);
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let mut s = buf.lines();
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assert_eq!(block_on_next!(s), "12".to_string());
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assert_eq!(block_on_next!(s), "".to_string());
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assert!(block_on(s.next()).is_none());
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}
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#[test]
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fn maybe_pending() {
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let buf =
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stream::iter(vec![&b"12"[..], &b"\r"[..]]).map(Ok).into_async_read().interleave_pending();
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let mut s = buf.lines();
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assert_eq!(run_next!(s), "12\r".to_string());
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assert!(run(s.next()).is_none());
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let buf = stream::iter(vec![&b"12"[..], &b"\r\n"[..], &b"\n"[..]])
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.map(Ok)
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.into_async_read()
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.interleave_pending();
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let mut s = buf.lines();
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assert_eq!(run_next!(s), "12".to_string());
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assert_eq!(run_next!(s), "".to_string());
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assert!(run(s.next()).is_none());
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}
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#[test]
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fn issue2862() {
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let mut lines = futures::io::BufReader::new(IOErrorRead(false)).lines();
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assert!(block_on(lines.next()).unwrap().is_err())
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}
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