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-rw-r--r--third_party/rust/tokio/tests/buffered.rs50
1 files changed, 50 insertions, 0 deletions
diff --git a/third_party/rust/tokio/tests/buffered.rs b/third_party/rust/tokio/tests/buffered.rs
new file mode 100644
index 0000000000..98b6d5f312
--- /dev/null
+++ b/third_party/rust/tokio/tests/buffered.rs
@@ -0,0 +1,50 @@
+#![warn(rust_2018_idioms)]
+#![cfg(feature = "full")]
+
+use tokio::net::TcpListener;
+use tokio_test::assert_ok;
+
+use std::io::prelude::*;
+use std::net::TcpStream;
+use std::thread;
+
+#[tokio::test]
+async fn echo_server() {
+ const N: usize = 1024;
+
+ let srv = assert_ok!(TcpListener::bind("127.0.0.1:0").await);
+ let addr = assert_ok!(srv.local_addr());
+
+ let msg = "foo bar baz";
+
+ let t = thread::spawn(move || {
+ let mut s = assert_ok!(TcpStream::connect(&addr));
+
+ let t2 = thread::spawn(move || {
+ let mut s = assert_ok!(TcpStream::connect(&addr));
+ let mut b = vec![0; msg.len() * N];
+ assert_ok!(s.read_exact(&mut b));
+ b
+ });
+
+ let mut expected = Vec::<u8>::new();
+ for _i in 0..N {
+ expected.extend(msg.as_bytes());
+ let res = assert_ok!(s.write(msg.as_bytes()));
+ assert_eq!(res, msg.len());
+ }
+
+ (expected, t2)
+ });
+
+ let (mut a, _) = assert_ok!(srv.accept().await);
+ let (mut b, _) = assert_ok!(srv.accept().await);
+
+ let n = assert_ok!(tokio::io::copy(&mut a, &mut b).await);
+
+ let (expected, t2) = t.join().unwrap();
+ let actual = t2.join().unwrap();
+
+ assert!(expected == actual);
+ assert_eq!(n, msg.len() as u64 * 1024);
+}