| use core::pin::Pin; |
| use futures::io::{AsyncBufRead, AsyncRead}; |
| use futures::stream::{self, TryStreamExt}; |
| use futures::task::Poll; |
| use futures_test::{stream::StreamTestExt, task::noop_context}; |
| |
| macro_rules! assert_read { |
| ($reader:expr, $buf:expr, $item:expr) => { |
| let mut cx = noop_context(); |
| loop { |
| match Pin::new(&mut $reader).poll_read(&mut cx, $buf) { |
| Poll::Ready(Ok(x)) => { |
| assert_eq!(x, $item); |
| break; |
| } |
| Poll::Ready(Err(err)) => { |
| panic!("assertion failed: expected value but got {}", err); |
| } |
| Poll::Pending => { |
| continue; |
| } |
| } |
| } |
| }; |
| } |
| |
| macro_rules! assert_fill_buf { |
| ($reader:expr, $buf:expr) => { |
| let mut cx = noop_context(); |
| loop { |
| match Pin::new(&mut $reader).poll_fill_buf(&mut cx) { |
| Poll::Ready(Ok(x)) => { |
| assert_eq!(x, $buf); |
| break; |
| } |
| Poll::Ready(Err(err)) => { |
| panic!("assertion failed: expected value but got {}", err); |
| } |
| Poll::Pending => { |
| continue; |
| } |
| } |
| } |
| }; |
| } |
| |
| #[test] |
| fn test_into_async_read() { |
| let stream = stream::iter((1..=3).flat_map(|_| vec![Ok(vec![]), Ok(vec![1, 2, 3, 4, 5])])); |
| let mut reader = stream.interleave_pending().into_async_read(); |
| let mut buf = vec![0; 3]; |
| |
| assert_read!(reader, &mut buf, 3); |
| assert_eq!(&buf, &[1, 2, 3]); |
| |
| assert_read!(reader, &mut buf, 2); |
| assert_eq!(&buf[..2], &[4, 5]); |
| |
| assert_read!(reader, &mut buf, 3); |
| assert_eq!(&buf, &[1, 2, 3]); |
| |
| assert_read!(reader, &mut buf, 2); |
| assert_eq!(&buf[..2], &[4, 5]); |
| |
| assert_read!(reader, &mut buf, 3); |
| assert_eq!(&buf, &[1, 2, 3]); |
| |
| assert_read!(reader, &mut buf, 2); |
| assert_eq!(&buf[..2], &[4, 5]); |
| |
| assert_read!(reader, &mut buf, 0); |
| } |
| |
| #[test] |
| fn test_into_async_bufread() { |
| let stream = stream::iter((1..=2).flat_map(|_| vec![Ok(vec![]), Ok(vec![1, 2, 3, 4, 5])])); |
| let mut reader = stream.interleave_pending().into_async_read(); |
| |
| let mut reader = Pin::new(&mut reader); |
| |
| assert_fill_buf!(reader, &[1, 2, 3, 4, 5][..]); |
| reader.as_mut().consume(3); |
| |
| assert_fill_buf!(reader, &[4, 5][..]); |
| reader.as_mut().consume(2); |
| |
| assert_fill_buf!(reader, &[1, 2, 3, 4, 5][..]); |
| reader.as_mut().consume(2); |
| |
| assert_fill_buf!(reader, &[3, 4, 5][..]); |
| reader.as_mut().consume(3); |
| |
| assert_fill_buf!(reader, &[][..]); |
| } |