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#![warn(rust_2018_idioms)]
#![cfg(all(feature = "full", not(target_os = "wasi"), not(miri)))] // Wasi doesn't support bind
// No `socket` on miri.
use std::io::Result;
use std::io::{Read, Write};
use std::{net, thread};
use tokio::io::{AsyncReadExt, AsyncWriteExt};
use tokio::net::TcpStream;
#[tokio::test]
async fn split() -> Result<()> {
const MSG: &[u8] = b"split";
let listener = net::TcpListener::bind("127.0.0.1:0")?;
let addr = listener.local_addr()?;
let handle = thread::spawn(move || {
let (mut stream, _) = listener.accept().unwrap();
stream.write_all(MSG).unwrap();
let mut read_buf = [0u8; 32];
let read_len = stream.read(&mut read_buf).unwrap();
assert_eq!(&read_buf[..read_len], MSG);
});
let mut stream = TcpStream::connect(&addr).await?;
let (mut read_half, mut write_half) = stream.split();
let mut read_buf = [0u8; 32];
let peek_len1 = read_half.peek(&mut read_buf[..]).await?;
let peek_len2 = read_half.peek(&mut read_buf[..]).await?;
assert_eq!(peek_len1, peek_len2);
let read_len = read_half.read(&mut read_buf[..]).await?;
assert_eq!(peek_len1, read_len);
assert_eq!(&read_buf[..read_len], MSG);
assert_eq!(write_half.write(MSG).await?, MSG.len());
handle.join().unwrap();
Ok(())
}
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