async-lock/async-mutex/tests/mutex.rs

68 lines
1.3 KiB
Rust

use std::sync::Arc;
use std::thread;
use async_mutex::Mutex;
use futures::channel::mpsc;
use futures::executor::block_on;
use futures::prelude::*;
#[test]
fn smoke() {
block_on(async {
let m = Mutex::new(());
drop(m.lock().await);
drop(m.lock().await);
})
}
#[test]
fn try_lock() {
let m = Mutex::new(());
*m.try_lock().unwrap() = ();
}
#[test]
fn into_inner() {
let m = Mutex::new(10i32);
assert_eq!(m.into_inner(), 10);
}
#[test]
fn get_mut() {
let mut m = Mutex::new(10i32);
*m.get_mut() = 20;
assert_eq!(m.into_inner(), 20);
}
#[test]
fn contention() {
block_on(async {
let (tx, mut rx) = mpsc::unbounded();
let tx = Arc::new(tx);
let mutex = Arc::new(Mutex::new(0i32));
let num_tasks = 100;
for _ in 0..num_tasks {
let tx = tx.clone();
let mutex = mutex.clone();
thread::spawn(|| {
block_on(async move {
let mut lock = mutex.lock().await;
*lock += 1;
tx.unbounded_send(()).unwrap();
drop(lock);
})
});
}
for _ in 0..num_tasks {
rx.next().await.unwrap();
}
let lock = mutex.lock().await;
assert_eq!(num_tasks, *lock);
});
}