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#![deny(warnings, rust_2018_idioms)]
#![feature(async_await)]
use tokio;
use tokio::io::{AsyncReadExt, AsyncWriteExt};
use tokio::net::{TcpListener, TcpStream};
use tokio::runtime::Runtime;
use tokio::sync::oneshot;
use tokio::timer::Delay;
use tokio_test::{assert_err, assert_ok};
use env_logger;
use std::sync::{mpsc, Arc, Mutex};
use std::thread;
use std::time::{Duration, Instant};
async fn client_server(tx: mpsc::Sender<()>) {
let addr = assert_ok!("127.0.0.1:0".parse());
let mut server = assert_ok!(TcpListener::bind(&addr));
// Get the assigned address
let addr = assert_ok!(server.local_addr());
// Spawn the server
tokio::spawn(async move {
// Accept a socket
let (mut socket, _) = server.accept().await.unwrap();
// Write some data
socket.write_all(b"hello").await.unwrap();
});
let mut client = TcpStream::connect(&addr).await.unwrap();
let mut buf = vec![];
client.read_to_end(&mut buf).await.unwrap();
assert_eq!(buf, b"hello");
tx.send(()).unwrap();
}
#[test]
fn spawn_shutdown() {
let _ = env_logger::try_init();
let rt = Runtime::new().unwrap();
let (tx, rx) = mpsc::channel();
rt.spawn(client_server(tx.clone()));
// Use executor trait
let f = Box::pin(client_server(tx));
tokio_executor::Executor::spawn(&mut rt.executor(), f).unwrap();
let mut e = tokio_executor::enter().unwrap();
e.block_on(rt.shutdown_on_idle());
assert_ok!(rx.try_recv());
assert_ok!(rx.try_recv());
assert_err!(rx.try_recv());
}
#[test]
fn block_on_timer() {
let rt = Runtime::new().unwrap();
let v = rt.block_on(async move {
let delay = Delay::new(Instant::now() + Duration::from_millis(100));
delay.await;
42
});
assert_eq!(v, 42);
let mut e = tokio_executor::enter().unwrap();
e.block_on(rt.shutdown_on_idle());
}
#[test]
fn block_on_socket() {
let rt = Runtime::new().unwrap();
rt.block_on(async move {
let addr = "127.0.0.1:0".parse().unwrap();
let (tx, rx) = oneshot::channel();
let mut listener = TcpListener::bind(&addr).unwrap();
let addr = listener.local_addr().unwrap();
tokio::spawn(async move {
let _ = listener.accept().await;
tx.send(()).unwrap();
});
TcpStream::connect(&addr).await.unwrap();
rx.await.unwrap();
});
}
#[test]
fn block_waits() {
let (a_tx, a_rx) = oneshot::channel();
let (b_tx, b_rx) = mpsc::channel();
thread::spawn(|| {
use std::time::Duration;
thread::sleep(Duration::from_millis(1000));
a_tx.send(()).unwrap();
});
let rt = Runtime::new().unwrap();
rt.block_on(async move {
a_rx.await.unwrap();
b_tx.send(()).unwrap();
});
assert_ok!(b_rx.try_recv());
let mut e = tokio_executor::enter().unwrap();
e.block_on(rt.shutdown_on_idle());
}
#[test]
fn spawn_many() {
const ITER: usize = 200;
let cnt = Arc::new(Mutex::new(0));
let rt = Runtime::new().unwrap();
let c = cnt.clone();
rt.block_on(async move {
for _ in 0..ITER {
let c = c.clone();
tokio::spawn(async move {
let mut x = c.lock().unwrap();
*x = 1 + *x;
});
}
});
let mut e = tokio_executor::enter().unwrap();
e.block_on(rt.shutdown_on_idle());
assert_eq!(ITER, *cnt.lock().unwrap());
}
#[test]
fn nested_enter() {
use std::panic;
let rt = Runtime::new().unwrap();
rt.block_on(async {
assert_err!(tokio_executor::enter());
// Since this is testing panics in other threads, printing about panics
// is noisy and can give the impression that the test is ignoring panics.
//
// It *is* ignoring them, but on purpose.
let prev_hook = panic::take_hook();
panic::set_hook(Box::new(|info| {
let s = info.to_string();
if s.starts_with("panicked at 'nested ")
|| s.starts_with("panicked at 'Multiple executors at once")
{
// expected, noop
} else {
println!("{}", s);
}
}));
let res = panic::catch_unwind(move || {
let rt = Runtime::new().unwrap();
rt.block_on(async {});
});
assert_err!(res);
panic::set_hook(prev_hook);
});
}
#[test]
fn after_start_and_before_stop_is_called() {
use std::sync::atomic::{AtomicUsize, Ordering};
let _ = env_logger::try_init();
let after_start = Arc::new(AtomicUsize::new(0));
let before_stop = Arc::new(AtomicUsize::new(0));
let after_inner = after_start.clone();
let before_inner = before_stop.clone();
let rt = tokio::runtime::Builder::new()
.after_start(move || {
after_inner.clone().fetch_add(1, Ordering::Relaxed);
})
.before_stop(move || {
before_inner.clone().fetch_add(1, Ordering::Relaxed);
})
.build()
.unwrap();
let (tx, rx) = mpsc::channel();
rt.block_on(client_server(tx));
let mut e = tokio_executor::enter().unwrap();
e.block_on(rt.shutdown_on_idle());
assert_ok!(rx.try_recv());
assert!(after_start.load(Ordering::Relaxed) > 0);
assert!(before_stop.load(Ordering::Relaxed) > 0);
}
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