1 files changed, 79 insertions, 0 deletions
diff --git a/third_party/rust/tokio-util/tests/udp.rs b/third_party/rust/tokio-util/tests/udp.rs
new file mode 100644
index 0000000000..af8002bd80
--- /dev/null
+++ b/third_party/rust/tokio-util/tests/udp.rs
@@ -0,0 +1,79 @@
+use tokio::net::UdpSocket;
+use tokio_util::codec::{Decoder, Encoder};
+use tokio_util::udp::UdpFramed;
+
+use bytes::{BufMut, BytesMut};
+use futures::future::try_join;
+use futures::future::FutureExt;
+use futures::sink::SinkExt;
+use futures::stream::StreamExt;
+use std::io;
+
+#[tokio::test]
+async fn send_framed() -> std::io::Result<()> {
+    let mut a_soc = UdpSocket::bind("127.0.0.1:0").await?;
+    let mut b_soc = UdpSocket::bind("127.0.0.1:0").await?;
+
+    let a_addr = a_soc.local_addr()?;
+    let b_addr = b_soc.local_addr()?;
+
+    // test sending & receiving bytes
+    {
+        let mut a = UdpFramed::new(a_soc, ByteCodec);
+        let mut b = UdpFramed::new(b_soc, ByteCodec);
+
+        let msg = b"4567".to_vec();
+
+        let send = a.send((msg.clone(), b_addr));
+        let recv = b.next().map(|e| e.unwrap());
+        let (_, received) = try_join(send, recv).await.unwrap();
+
+        let (data, addr) = received;
+        assert_eq!(msg, data);
+        assert_eq!(a_addr, addr);
+
+        a_soc = a.into_inner();
+        b_soc = b.into_inner();
+    }
+
+    // test sending & receiving an empty message
+    {
+        let mut a = UdpFramed::new(a_soc, ByteCodec);
+        let mut b = UdpFramed::new(b_soc, ByteCodec);
+
+        let msg = b"".to_vec();
+
+        let send = a.send((msg.clone(), b_addr));
+        let recv = b.next().map(|e| e.unwrap());
+        let (_, received) = try_join(send, recv).await.unwrap();
+
+        let (data, addr) = received;
+        assert_eq!(msg, data);
+        assert_eq!(a_addr, addr);
+    }
+
+    Ok(())
+}
+
+pub struct ByteCodec;
+
+impl Decoder for ByteCodec {
+    type Item = Vec<u8>;
+    type Error = io::Error;
+
+    fn decode(&mut self, buf: &mut BytesMut) -> Result<Option<Vec<u8>>, io::Error> {
+        let len = buf.len();
+        Ok(Some(buf.split_to(len).to_vec()))
+    }
+}
+
+impl Encoder for ByteCodec {
+    type Item = Vec<u8>;
+    type Error = io::Error;
+
+    fn encode(&mut self, data: Vec<u8>, buf: &mut BytesMut) -> Result<(), io::Error> {
+        buf.reserve(data.len());
+        buf.put_slice(&data);
+        Ok(())
+    }
+}