83 lines
1.8 KiB
Rust
83 lines
1.8 KiB
Rust
#![warn(rust_2018_idioms)]
|
|
#![cfg(feature = "full")]
|
|
|
|
use tokio::io::{join, AsyncRead, AsyncReadExt, AsyncWrite, AsyncWriteExt, Join, ReadBuf};
|
|
|
|
use std::io;
|
|
use std::pin::Pin;
|
|
use std::task::{Context, Poll};
|
|
|
|
struct R;
|
|
|
|
impl AsyncRead for R {
|
|
fn poll_read(
|
|
self: Pin<&mut Self>,
|
|
_cx: &mut Context<'_>,
|
|
buf: &mut ReadBuf<'_>,
|
|
) -> Poll<io::Result<()>> {
|
|
buf.put_slice(&[b'z']);
|
|
Poll::Ready(Ok(()))
|
|
}
|
|
}
|
|
|
|
struct W;
|
|
|
|
impl AsyncWrite for W {
|
|
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::<Join<W, R>>();
|
|
}
|
|
|
|
#[test]
|
|
fn method_delegation() {
|
|
let mut rw = join(R, W);
|
|
let mut buf = [0; 1];
|
|
|
|
tokio_test::block_on(async move {
|
|
assert_eq!(1, rw.read(&mut buf).await.unwrap());
|
|
assert_eq!(b'z', buf[0]);
|
|
|
|
assert_eq!(1, rw.write(&[b'x']).await.unwrap());
|
|
assert_eq!(
|
|
2,
|
|
rw.write_vectored(&[io::IoSlice::new(&[b'x'])])
|
|
.await
|
|
.unwrap()
|
|
);
|
|
assert!(rw.is_write_vectored());
|
|
|
|
assert!(rw.flush().await.is_ok());
|
|
assert!(rw.shutdown().await.is_ok());
|
|
});
|
|
}
|