cocaine 0.9.2

Cocaine Framework Rust
Documentation 
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extern crate cocaine;
extern crate futures;
extern crate libc;
extern crate net2;
extern crate rmp_serde as rmps;
extern crate tokio_core;

use std::io::{ErrorKind, Write};
use std::net::{IpAddr, Ipv4Addr, SocketAddr, TcpListener};
use std::os::unix::io::IntoRawFd;
use std::thread;

use futures::sync::oneshot;
use net2::TcpStreamExt;
use tokio_core::reactor::Core;

use cocaine::{Dispatch, Error, FixedResolver, Request, Response, ServiceBuilder};

fn endpoint() -> SocketAddr {
    SocketAddr::new(IpAddr::V4(Ipv4Addr::new(127, 0, 0, 1)), 0)
}

#[test]
fn connect() {
    let sock = TcpListener::bind(&endpoint()).unwrap();
    let addr = sock.local_addr().unwrap();

    let (tx, rx) = oneshot::channel();
    let thread = thread::spawn(move || {
        sock.accept().unwrap();
        drop(tx.send(()));
    });

    let mut core = Core::new().unwrap();

    let service = ServiceBuilder::new("service")
        .resolver(FixedResolver::new(vec![addr]))
        .build(&core.handle());

    core.run(service.connect()).unwrap();
    core.run(rx).unwrap();
    thread.join().unwrap();
}

#[test]
fn connection_refused() {
    let addr = SocketAddr::new(IpAddr::V4(Ipv4Addr::new(127, 0, 0, 1)), 0);
    let mut core = Core::new().unwrap();

    let service = ServiceBuilder::new("service")
        .resolver(FixedResolver::new(vec![addr]))
        .build(&core.handle());

    match core.run(service.connect()).err().unwrap() {
        Error::Io(ref err) => {
            assert_eq!(ErrorKind::ConnectionRefused, err.kind());
        }
        err => panic!("expected I/O error, actual {:?}", err),
    }
}

#[test]
fn connection_refused_because_invalid_framing() {
    // The test checks that the proper error is returned when the framework detects invalid framing
    // during decoding the `Locator` response.

    let sock = TcpListener::bind(&endpoint()).unwrap();
    let addr = sock.local_addr().unwrap();

    let (tx, rx) = oneshot::channel();
    let thread = thread::spawn(move || {
        let (mut sock, ..) = sock.accept().unwrap();
        sock.set_linger(None).unwrap();

        let frame = rmps::to_vec(&(1, 0, &[0u8; 0])).unwrap();
        sock.write(&frame).unwrap();

        tx.send(()).unwrap();
    });

    let mut core = Core::new().unwrap();

    let service = ServiceBuilder::new("service")
        .locator_addrs(vec![addr])
        .build(&core.handle());

    match core.run(service.connect()).err().unwrap() {
        Error::InvalidDataFraming(..) |
        Error::Canceled => {}
        err => panic!("expected `InvalidDataFraming` error, actual {:?}", err),
    }
    match core.run(rx) {
        Ok(()) => {}
        Err(futures::Canceled) => {}
    }
    thread.join().unwrap();
}

#[test]
fn dispatch_receives_rst() {
    let sock = TcpListener::bind(&endpoint()).unwrap();
    let addr = sock.local_addr().unwrap();

    let thread = thread::spawn(move || {
        let (mut sock, ..) = sock.accept().unwrap();
        sock.set_linger(None).unwrap();

        let frame = rmps::to_vec(&(1, 0, &[0u8; 0])).unwrap();
        sock.write(&frame[..2]).unwrap();

        // Close the socket, forcing it to send RST.
        unsafe {
            libc::close(sock.into_raw_fd());
        }
    });

    let mut core = Core::new().unwrap();

    let service = ServiceBuilder::new("service")
        .resolver(FixedResolver::new(vec![addr]))
        .build(&core.handle());

    struct MockDispatch {
        tx: oneshot::Sender<()>,
    }

    impl Dispatch for MockDispatch {
        fn process(self: Box<Self>, _response: &Response) -> Option<Box<Dispatch>> {
            panic!("expected calling `discard`, called `process`");
        }

        fn discard(self: Box<Self>, err: &Error) {
            match err {
                &Error::Io(ref err) => {
                    assert!(
                        ErrorKind::ConnectionReset == err.kind() ||
                            ErrorKind::UnexpectedEof == err.kind()
                    );
                    drop(self.tx.send(()));
                }
                err => panic!("expected I/O error, actual {:?}", err),
            }
        }
    }

    let (tx, rx) = oneshot::channel();

    match core.run(service.call(Request::new(0, &["node"]).unwrap(), MockDispatch { tx: tx })) {
        Ok(..) => {}
        Err(Error::Io(ref err)) if err.kind() == ErrorKind::BrokenPipe => {}
        Err(err) => panic!("expected I/O error, actual {:?}", err),
    }
    match core.run(rx) {
        Ok(()) => {}
        Err(futures::Canceled) => {}
    }

    thread.join().unwrap();
}