From c393236dfd12c13e82badd631d3a3a90481c6f95 Mon Sep 17 00:00:00 2001
From: Sean McArthur <sean@seanmonstar.com>
Date: Thu, 13 Aug 2020 20:15:01 -0700
Subject: io: change AsyncRead to use a ReadBuf (#2758)

Works towards #2716. Changes the argument to `AsyncRead::poll_read` to
take a `ReadBuf` struct that safely manages writes to uninitialized memory.
---
 tokio/tests/io_split.rs | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

(limited to 'tokio/tests/io_split.rs')

diff --git a/tokio/tests/io_split.rs b/tokio/tests/io_split.rs
index e54bf248..7b401424 100644
--- a/tokio/tests/io_split.rs
+++ b/tokio/tests/io_split.rs
@@ -1,7 +1,7 @@
 #![warn(rust_2018_idioms)]
 #![cfg(feature = "full")]
 
-use tokio::io::{split, AsyncRead, AsyncWrite, ReadHalf, WriteHalf};
+use tokio::io::{split, AsyncRead, AsyncWrite, ReadBuf, ReadHalf, WriteHalf};
 
 use std::io;
 use std::pin::Pin;
@@ -13,9 +13,10 @@ impl AsyncRead for RW {
     fn poll_read(
         self: Pin<&mut Self>,
         _cx: &mut Context<'_>,
-        _buf: &mut [u8],
-    ) -> Poll<io::Result<usize>> {
-        Poll::Ready(Ok(1))
+        buf: &mut ReadBuf<'_>,
+    ) -> Poll<io::Result<()>> {
+        buf.append(&[b'z']);
+        Poll::Ready(Ok(()))
     }
 }
 
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