1 files changed, 276 insertions, 0 deletions
diff --git a/third_party/rust/mio-uds/tests/echo.rs b/third_party/rust/mio-uds/tests/echo.rs
new file mode 100644
index 0000000000..324b9f8460
--- /dev/null
+++ b/third_party/rust/mio-uds/tests/echo.rs
@@ -0,0 +1,276 @@
+extern crate mio;
+extern crate tempdir;
+extern crate mio_uds;
+
+use std::io::{self, Write, Read};
+use std::io::ErrorKind::WouldBlock;
+
+use tempdir::TempDir;
+
+use mio::*;
+use mio_uds::*;
+
+macro_rules! t {
+    ($e:expr) => (match $e {
+        Ok(e) => e,
+        Err(e) => panic!("{} failed with {}", stringify!($e), e),
+    })
+}
+
+const SERVER: Token = Token(0);
+const CLIENT: Token = Token(1);
+
+struct EchoConn {
+    sock: UnixStream,
+    buf: Vec<u8>,
+    token: Option<Token>,
+    interest: Ready,
+}
+
+impl EchoConn {
+    fn new(sock: UnixStream) -> EchoConn {
+        EchoConn {
+            sock: sock,
+            buf: Vec::new(),
+            token: None,
+            interest: Ready::readable(),
+        }
+    }
+
+    fn writable(&mut self, poll: &Poll) -> io::Result<()> {
+        match self.sock.write(&self.buf) {
+            Ok(n) => {
+                assert_eq!(n, self.buf.len());
+                self.interest.insert(Ready::readable());
+                self.interest.remove(Ready::writable());
+            }
+            Err(ref e) if e.kind() == WouldBlock => {
+                self.interest.insert(Ready::writable());
+            }
+            Err(e) => panic!("not implemented; client err={:?}", e),
+        }
+
+        assert!(self.interest.is_readable() || self.interest.is_writable(),
+                "actual={:?}", self.interest);
+        poll.reregister(&self.sock, self.token.unwrap(), self.interest,
+                        PollOpt::edge() | PollOpt::oneshot())
+    }
+
+    fn readable(&mut self, poll: &Poll) -> io::Result<()> {
+        let mut buf = [0; 1024];
+
+        match self.sock.read(&mut buf) {
+            Ok(r) => {
+                self.buf = buf[..r].to_vec();
+
+                self.interest.remove(Ready::readable());
+                self.interest.insert(Ready::writable());
+            }
+            Err(ref e) if e.kind() == WouldBlock => {}
+            Err(_e) => {
+                self.interest.remove(Ready::readable());
+            }
+        }
+
+        assert!(self.interest.is_readable() || self.interest.is_writable(),
+                "actual={:?}", self.interest);
+        poll.reregister(&self.sock, self.token.unwrap(), self.interest,
+                        PollOpt::edge() | PollOpt::oneshot())
+    }
+}
+
+struct EchoServer {
+    sock: UnixListener,
+    conns: Vec<Option<EchoConn>>,
+}
+
+impl EchoServer {
+    fn accept(&mut self, poll: &Poll) -> io::Result<()> {
+        let sock = t!(self.sock.accept()).unwrap().0;
+        let conn = EchoConn::new(sock);
+        let tok = Token(self.conns.len() + 2);
+        self.conns.push(Some(conn));
+
+        // Register the connection
+        self.conn(tok).token = Some(tok);
+        t!(poll.register(&self.conn(tok).sock, tok,
+                         Ready::readable(),
+                         PollOpt::edge() | PollOpt::oneshot()));
+
+        Ok(())
+    }
+
+    fn conn_readable(&mut self, poll: &Poll, tok: Token) -> io::Result<()> {
+        self.conn(tok).readable(poll)
+    }
+
+    fn conn_writable(&mut self, poll: &Poll, tok: Token) -> io::Result<()> {
+        self.conn(tok).writable(poll)
+    }
+
+    fn conn<'a>(&'a mut self, tok: Token) -> &'a mut EchoConn {
+        self.conns[usize::from(tok) - 2].as_mut().unwrap()
+    }
+}
+
+struct EchoClient {
+    sock: UnixStream,
+    msgs: Vec<&'static str>,
+    tx: &'static [u8],
+    rx: &'static [u8],
+    token: Token,
+    interest: Ready,
+    active: bool,
+}
+
+
+// Sends a message and expects to receive the same exact message, one at a time
+impl EchoClient {
+    fn new(sock: UnixStream, tok: Token,  mut msgs: Vec<&'static str>) -> EchoClient {
+        let curr = msgs.remove(0);
+
+        EchoClient {
+            sock: sock,
+            msgs: msgs,
+            tx: curr.as_bytes(),
+            rx: curr.as_bytes(),
+            token: tok,
+            interest: Ready::empty(),
+            active: true,
+        }
+    }
+
+    fn readable(&mut self, poll: &Poll) -> io::Result<()> {
+        let mut buf = [0; 1024];
+        match self.sock.read(&mut buf) {
+            Ok(n) => {
+                assert_eq!(&self.rx[..n], &buf[..n]);
+                self.rx = &self.rx[n..];
+
+                self.interest.remove(Ready::readable());
+
+                if self.rx.len() == 0 {
+                    self.next_msg(poll).unwrap();
+                }
+            }
+            Err(ref e) if e.kind() == WouldBlock => {}
+            Err(e) => panic!("error {}", e),
+        }
+
+        if !self.interest.is_empty() {
+            assert!(self.interest.is_readable() || self.interest.is_writable(),
+                    "actual={:?}", self.interest);
+            try!(poll.reregister(&self.sock, self.token, self.interest,
+                                 PollOpt::edge() | PollOpt::oneshot()));
+        }
+
+        Ok(())
+    }
+
+    fn writable(&mut self, poll: &Poll) -> io::Result<()> {
+        match self.sock.write(self.tx) {
+            Ok(r) => {
+                self.tx = &self.tx[r..];
+                self.interest.insert(Ready::readable());
+                self.interest.remove(Ready::writable());
+            }
+            Err(ref e) if e.kind() == WouldBlock => {
+                self.interest.insert(Ready::writable());
+            }
+            Err(e) => panic!("not implemented; client err={:?}", e)
+        }
+
+        assert!(self.interest.is_readable() || self.interest.is_writable(),
+                "actual={:?}", self.interest);
+        poll.reregister(&self.sock, self.token, self.interest,
+                        PollOpt::edge() | PollOpt::oneshot())
+    }
+
+    fn next_msg(&mut self, poll: &Poll) -> io::Result<()> {
+        if self.msgs.is_empty() {
+            self.active = false;
+            return Ok(());
+        }
+
+        let curr = self.msgs.remove(0);
+
+        self.tx = curr.as_bytes();
+        self.rx = curr.as_bytes();
+
+        self.interest.insert(Ready::writable());
+        assert!(self.interest.is_readable() || self.interest.is_writable(),
+                "actual={:?}", self.interest);
+        poll.reregister(&self.sock, self.token, self.interest,
+                        PollOpt::edge() | PollOpt::oneshot())
+    }
+}
+
+struct Echo {
+    server: EchoServer,
+    client: EchoClient,
+}
+
+impl Echo {
+    fn new(srv: UnixListener, client: UnixStream, msgs: Vec<&'static str>) -> Echo {
+        Echo {
+            server: EchoServer {
+                sock: srv,
+                conns: Vec::new(),
+            },
+            client: EchoClient::new(client, CLIENT, msgs)
+        }
+    }
+
+    fn ready(&mut self,
+             poll: &Poll,
+             token: Token,
+             events: Ready) {
+        println!("ready {:?} {:?}", token, events);
+        if events.is_readable() {
+            match token {
+                SERVER => self.server.accept(poll).unwrap(),
+                CLIENT => self.client.readable(poll).unwrap(),
+                i => self.server.conn_readable(poll, i).unwrap()
+            }
+        }
+
+        if events.is_writable() {
+            match token {
+                SERVER => panic!("received writable for token 0"),
+                CLIENT => self.client.writable(poll).unwrap(),
+                _ => self.server.conn_writable(poll, token).unwrap()
+            }
+        }
+    }
+}
+
+#[test]
+fn echo_server() {
+    let tmp_dir = t!(TempDir::new("mio-uds"));
+    let addr = tmp_dir.path().join("sock");
+
+    let poll = t!(Poll::new());
+    let mut events = Events::with_capacity(1024);
+
+    let srv = t!(UnixListener::bind(&addr));
+    t!(poll.register(&srv,
+                     SERVER,
+                     Ready::readable(),
+                     PollOpt::edge() | PollOpt::oneshot()));
+
+    let sock = t!(UnixStream::connect(&addr));
+    t!(poll.register(&sock,
+                     CLIENT,
+                     Ready::writable(),
+                     PollOpt::edge() | PollOpt::oneshot()));
+
+    let mut echo = Echo::new(srv, sock, vec!["foo", "bar"]);
+    while echo.client.active {
+        t!(poll.poll(&mut events, None));
+
+        for i in 0..events.len() {
+            let event = events.get(i).unwrap();
+            echo.ready(&poll, event.token(), event.readiness());
+        }
+    }
+}