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|
use {localhost, sleep_ms};
use mio::*;
use mio::deprecated::{EventLoop, EventLoopBuilder, Handler, Sender, NotifyError};
use mio::net::TcpListener;
use std::thread;
struct TestHandler {
sender: Sender<String>,
notify: usize
}
impl TestHandler {
fn new(sender: Sender<String>) -> TestHandler {
TestHandler {
sender,
notify: 0
}
}
}
impl Handler for TestHandler {
type Timeout = usize;
type Message = String;
fn notify(&mut self, event_loop: &mut EventLoop<TestHandler>, msg: String) {
match self.notify {
0 => {
assert!(msg == "First", "actual={}", msg);
self.sender.send("Second".to_string()).unwrap();
}
1 => {
assert!(msg == "Second", "actual={}", msg);
event_loop.shutdown();
}
v => panic!("unexpected value for notify; val={}", v)
}
self.notify += 1;
}
}
#[test]
pub fn test_notify() {
debug!("Starting TEST_NOTIFY");
let mut event_loop = EventLoop::new().unwrap();
let addr = localhost();
// Setup a server socket so that the event loop blocks
let srv = TcpListener::bind(&addr).unwrap();
event_loop.register(&srv, Token(0), Ready::readable() | Ready::writable(), PollOpt::edge()).unwrap();
let sender = event_loop.channel();
thread::spawn(move || {
sleep_ms(1_000);
sender.send("First".to_string()).unwrap();
});
let sender = event_loop.channel();
let mut handler = TestHandler::new(sender);
// Start the event loop
event_loop.run(&mut handler).unwrap();
assert!(handler.notify == 2, "actual={}", handler.notify);
}
#[test]
pub fn test_notify_capacity() {
use std::sync::mpsc::*;
use std::thread;
struct Capacity(Receiver<i32>);
impl Handler for Capacity {
type Message = i32;
type Timeout = ();
fn notify(&mut self, event_loop: &mut EventLoop<Capacity>, msg: i32) {
if msg == 1 {
self.0.recv().unwrap();
} else if msg == 3 {
event_loop.shutdown();
}
}
}
let mut builder = EventLoopBuilder::new();
builder.notify_capacity(1);
let (tx, rx) = channel::<i32>();
let mut event_loop = builder.build().unwrap();
let notify = event_loop.channel();
let handle = thread::spawn(move || {
let mut handler = Capacity(rx);
event_loop.run(&mut handler).unwrap();
});
assert!(notify.send(1).is_ok());
loop {
if notify.send(2).is_err() {
break;
}
}
tx.send(1).unwrap();
loop {
if notify.send(3).is_ok() {
break;
}
}
handle.join().unwrap();
}
#[test]
pub fn test_notify_drop() {
use std::sync::mpsc::{self,Sender};
use std::thread;
struct MessageDrop(Sender<u8>);
impl Drop for MessageDrop {
fn drop(&mut self) {
self.0.send(0).unwrap();
}
}
struct DummyHandler;
impl Handler for DummyHandler {
type Timeout = ();
type Message = MessageDrop;
fn notify(&mut self, event_loop: &mut EventLoop<Self>, msg: MessageDrop) {
msg.0.send(1).unwrap();
drop(msg);
// We stop after the first message
event_loop.shutdown();
}
}
let (tx_notif_1, rx_notif_1) = mpsc::channel();
let (tx_notif_2, rx_notif_2) = mpsc::channel();
let (tx_notif_3, _unused) = mpsc::channel();
let (tx_exit_loop, rx_exit_loop) = mpsc::channel();
let (tx_drop_loop, rx_drop_loop) = mpsc::channel();
let mut event_loop = EventLoop::new().unwrap();
let notify = event_loop.channel();
let handle = thread::spawn(move || {
let mut handler = DummyHandler;
event_loop.run(&mut handler).unwrap();
// Confirmation we exited the loop
tx_exit_loop.send(()).unwrap();
// Order to drop the loop
rx_drop_loop.recv().unwrap();
drop(event_loop);
});
notify.send(MessageDrop(tx_notif_1)).unwrap();
assert_eq!(rx_notif_1.recv().unwrap(), 1); // Response from the loop
assert_eq!(rx_notif_1.recv().unwrap(), 0); // Drop notification
// We wait for the event loop to exit before sending the second notification
rx_exit_loop.recv().unwrap();
notify.send(MessageDrop(tx_notif_2)).unwrap();
// We ensure the message is indeed stuck in the queue
sleep_ms(100);
assert!(rx_notif_2.try_recv().is_err());
// Give the order to drop the event loop
tx_drop_loop.send(()).unwrap();
assert_eq!(rx_notif_2.recv().unwrap(), 0); // Drop notification
// Check that sending a new notification will return an error
// We should also get our message back
match notify.send(MessageDrop(tx_notif_3)).unwrap_err() {
NotifyError::Closed(Some(..)) => {}
_ => panic!(),
}
handle.join().unwrap();
}
|
