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#![warn(rust_2018_idioms)]
#![cfg(feature = "full")]
use std::sync::Arc;
use tokio::net::UdpSocket;
const MSG: &[u8] = b"hello";
const MSG_LEN: usize = MSG.len();
#[tokio::test]
async fn send_recv() -> std::io::Result<()> {
let sender = UdpSocket::bind("127.0.0.1:0").await?;
let receiver = UdpSocket::bind("127.0.0.1:0").await?;
sender.connect(receiver.local_addr()?).await?;
receiver.connect(sender.local_addr()?).await?;
sender.send(MSG).await?;
let mut recv_buf = [0u8; 32];
let len = receiver.recv(&mut recv_buf[..]).await?;
assert_eq!(&recv_buf[..len], MSG);
Ok(())
}
#[tokio::test]
async fn send_to_recv_from() -> std::io::Result<()> {
let sender = UdpSocket::bind("127.0.0.1:0").await?;
let receiver = UdpSocket::bind("127.0.0.1:0").await?;
let receiver_addr = receiver.local_addr()?;
sender.send_to(MSG, &receiver_addr).await?;
let mut recv_buf = [0u8; 32];
let (len, addr) = receiver.recv_from(&mut recv_buf[..]).await?;
assert_eq!(&recv_buf[..len], MSG);
assert_eq!(addr, sender.local_addr()?);
Ok(())
}
#[tokio::test]
async fn split() -> std::io::Result<()> {
let socket = UdpSocket::bind("127.0.0.1:0").await?;
let s = Arc::new(socket);
let r = s.clone();
let addr = s.local_addr()?;
tokio::spawn(async move {
s.send_to(MSG, &addr).await.unwrap();
});
let mut recv_buf = [0u8; 32];
let (len, _) = r.recv_from(&mut recv_buf[..]).await?;
assert_eq!(&recv_buf[..len], MSG);
Ok(())
}
#[tokio::test]
async fn split_chan() -> std::io::Result<()> {
// setup UdpSocket that will echo all sent items
let socket = UdpSocket::bind("127.0.0.1:0").await?;
let addr = socket.local_addr().unwrap();
let s = Arc::new(socket);
let r = s.clone();
let (tx, mut rx) = tokio::sync::mpsc::channel::<(Vec<u8>, std::net::SocketAddr)>(1_000);
tokio::spawn(async move {
while let Some((bytes, addr)) = rx.recv().await {
s.send_to(&bytes, &addr).await.unwrap();
}
});
tokio::spawn(async move {
let mut buf = [0u8; 32];
loop {
let (len, addr) = r.recv_from(&mut buf).await.unwrap();
tx.send((buf[..len].to_vec(), addr)).await.unwrap();
}
});
// test that we can send a value and get back some response
let sender = UdpSocket::bind("127.0.0.1:0").await?;
sender.send_to(MSG, addr).await?;
let mut recv_buf = [0u8; 32];
let (len, _) = sender.recv_from(&mut recv_buf).await?;
assert_eq!(&recv_buf[..len], MSG);
Ok(())
}
// # Note
//
// This test is purposely written such that each time `sender` sends data on
// the socket, `receiver` awaits the data. On Unix, it would be okay waiting
// until the end of the test to receive all the data. On Windows, this would
// **not** be okay because it's resources are completion based (via IOCP).
// If data is sent and not yet received, attempting to send more data will
// result in `ErrorKind::WouldBlock` until the first operation completes.
#[tokio::test]
async fn try_send_spawn() {
const MSG2: &[u8] = b"world!";
const MSG2_LEN: usize = MSG2.len();
let sender = UdpSocket::bind("127.0.0.1:0").await.unwrap();
let receiver = UdpSocket::bind("127.0.0.1:0").await.unwrap();
receiver
.connect(sender.local_addr().unwrap())
.await
.unwrap();
let sent = &sender
.try_send_to(MSG, receiver.local_addr().unwrap())
.unwrap();
assert_eq!(sent, &MSG_LEN);
let mut buf = [0u8; 32];
let mut received = receiver.recv(&mut buf[..]).await.unwrap();
sender
.connect(receiver.local_addr().unwrap())
.await
.unwrap();
let sent = &sender.try_send(MSG2).unwrap();
assert_eq!(sent, &MSG2_LEN);
received += receiver.recv(&mut buf[..]).await.unwrap();
std::thread::spawn(move || {
let sent = &sender.try_send(MSG).unwrap();
assert_eq!(sent, &MSG_LEN);
})
.join()
.unwrap();
received += receiver.recv(&mut buf[..]).await.unwrap();
assert_eq!(received, MSG_LEN * 2 + MSG2_LEN);
}
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