#![warn(rust_2018_idioms)] #![cfg(all(feature = "full", not(target_os = "wasi")))] // Wasi doesn't support bind use tokio::io::{self, AsyncReadExt, AsyncWriteExt}; use tokio::net::{TcpListener, TcpStream}; use tokio::sync::oneshot; use tokio_test::assert_ok; #[tokio::test] async fn echo_server() { const ITER: usize = 1024; let (tx, rx) = oneshot::channel(); let srv = assert_ok!(TcpListener::bind("127.0.0.1:0").await); let addr = assert_ok!(srv.local_addr()); let msg = "foo bar baz"; tokio::spawn(async move { let mut stream = assert_ok!(TcpStream::connect(&addr).await); for _ in 0..ITER { // write assert_ok!(stream.write_all(msg.as_bytes()).await); // read let mut buf = [0; 11]; assert_ok!(stream.read_exact(&mut buf).await); assert_eq!(&buf[..], msg.as_bytes()); } assert_ok!(tx.send(())); }); let (mut stream, _) = assert_ok!(srv.accept().await); let (mut rd, mut wr) = stream.split(); let n = assert_ok!(io::copy(&mut rd, &mut wr).await); assert_eq!(n, (ITER * msg.len()) as u64); assert_ok!(rx.await); }