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#![warn(rust_2018_idioms)]
#![cfg(all(feature = "full", not(target_os = "wasi")))] // Wasi does not support panic recovery
use tokio::io::{
split, AsyncRead, AsyncReadExt, AsyncWrite, AsyncWriteExt, ReadBuf, ReadHalf, WriteHalf,
};
use std::io;
use std::pin::Pin;
use std::task::{Context, Poll};
struct RW;
impl AsyncRead for RW {
fn poll_read(
self: Pin<&mut Self>,
_cx: &mut Context<'_>,
buf: &mut ReadBuf<'_>,
) -> Poll<io::Result<()>> {
buf.put_slice(&[b'z']);
Poll::Ready(Ok(()))
}
}
impl AsyncWrite for RW {
fn poll_write(
self: Pin<&mut Self>,
_cx: &mut Context<'_>,
_buf: &[u8],
) -> Poll<Result<usize, io::Error>> {
Poll::Ready(Ok(1))
}
fn poll_flush(self: Pin<&mut Self>, _cx: &mut Context<'_>) -> Poll<Result<(), io::Error>> {
Poll::Ready(Ok(()))
}
fn poll_shutdown(self: Pin<&mut Self>, _cx: &mut Context<'_>) -> Poll<Result<(), io::Error>> {
Poll::Ready(Ok(()))
}
fn poll_write_vectored(
self: Pin<&mut Self>,
_cx: &mut Context<'_>,
_bufs: &[io::IoSlice<'_>],
) -> Poll<Result<usize, io::Error>> {
Poll::Ready(Ok(2))
}
fn is_write_vectored(&self) -> bool {
true
}
}
#[test]
fn is_send_and_sync() {
fn assert_bound<T: Send + Sync>() {}
assert_bound::<ReadHalf<RW>>();
assert_bound::<WriteHalf<RW>>();
}
#[test]
fn split_stream_id() {
let (r1, w1) = split(RW);
let (r2, w2) = split(RW);
assert!(r1.is_pair_of(&w1));
assert!(!r1.is_pair_of(&w2));
assert!(r2.is_pair_of(&w2));
assert!(!r2.is_pair_of(&w1));
}
#[test]
fn unsplit_ok() {
let (r, w) = split(RW);
r.unsplit(w);
}
#[test]
#[should_panic]
fn unsplit_err1() {
let (r, _) = split(RW);
let (_, w) = split(RW);
r.unsplit(w);
}
#[test]
#[should_panic]
fn unsplit_err2() {
let (_, w) = split(RW);
let (r, _) = split(RW);
r.unsplit(w);
}
#[test]
fn method_delegation() {
let (mut r, mut w) = split(RW);
let mut buf = [0; 1];
tokio_test::block_on(async move {
assert_eq!(1, r.read(&mut buf).await.unwrap());
assert_eq!(b'z', buf[0]);
assert_eq!(1, w.write(&[b'x']).await.unwrap());
assert_eq!(
2,
w.write_vectored(&[io::IoSlice::new(&[b'x'])])
.await
.unwrap()
);
assert!(w.is_write_vectored());
assert!(w.flush().await.is_ok());
assert!(w.shutdown().await.is_ok());
});
}