1 files changed, 179 insertions, 0 deletions
diff --git a/third_party/rust/futures/tests/eventual.rs b/third_party/rust/futures/tests/eventual.rs
new file mode 100644
index 0000000000..57a49b2417
--- /dev/null
+++ b/third_party/rust/futures/tests/eventual.rs
@@ -0,0 +1,179 @@
+use futures::channel::oneshot;
+use futures::executor::ThreadPool;
+use futures::future::{self, ok, Future, FutureExt, TryFutureExt};
+use futures::task::SpawnExt;
+use std::sync::mpsc;
+use std::thread;
+
+fn run<F: Future + Send + 'static>(future: F) {
+    let tp = ThreadPool::new().unwrap();
+    tp.spawn(future.map(drop)).unwrap();
+}
+
+#[test]
+fn join1() {
+    let (tx, rx) = mpsc::channel();
+    run(future::try_join(ok::<i32, i32>(1), ok(2)).map_ok(move |v| tx.send(v).unwrap()));
+    assert_eq!(rx.recv(), Ok((1, 2)));
+    assert!(rx.recv().is_err());
+
+    std::thread::sleep(std::time::Duration::from_millis(500)); // wait for background threads closed: https://github.com/rust-lang/miri/issues/1371
+}
+
+#[test]
+fn join2() {
+    let (c1, p1) = oneshot::channel::<i32>();
+    let (c2, p2) = oneshot::channel::<i32>();
+    let (tx, rx) = mpsc::channel();
+    run(future::try_join(p1, p2).map_ok(move |v| tx.send(v).unwrap()));
+    assert!(rx.try_recv().is_err());
+    c1.send(1).unwrap();
+    assert!(rx.try_recv().is_err());
+    c2.send(2).unwrap();
+    assert_eq!(rx.recv(), Ok((1, 2)));
+    assert!(rx.recv().is_err());
+
+    std::thread::sleep(std::time::Duration::from_millis(500)); // wait for background threads closed: https://github.com/rust-lang/miri/issues/1371
+}
+
+#[test]
+fn join3() {
+    let (c1, p1) = oneshot::channel::<i32>();
+    let (c2, p2) = oneshot::channel::<i32>();
+    let (tx, rx) = mpsc::channel();
+    run(future::try_join(p1, p2).map_err(move |_v| tx.send(1).unwrap()));
+    assert!(rx.try_recv().is_err());
+    drop(c1);
+    assert_eq!(rx.recv(), Ok(1));
+    assert!(rx.recv().is_err());
+    drop(c2);
+
+    std::thread::sleep(std::time::Duration::from_millis(500)); // wait for background threads closed: https://github.com/rust-lang/miri/issues/1371
+}
+
+#[test]
+fn join4() {
+    let (c1, p1) = oneshot::channel::<i32>();
+    let (c2, p2) = oneshot::channel::<i32>();
+    let (tx, rx) = mpsc::channel();
+    run(future::try_join(p1, p2).map_err(move |v| tx.send(v).unwrap()));
+    assert!(rx.try_recv().is_err());
+    drop(c1);
+    assert!(rx.recv().is_ok());
+    drop(c2);
+    assert!(rx.recv().is_err());
+
+    std::thread::sleep(std::time::Duration::from_millis(500)); // wait for background threads closed: https://github.com/rust-lang/miri/issues/1371
+}
+
+#[test]
+fn join5() {
+    let (c1, p1) = oneshot::channel::<i32>();
+    let (c2, p2) = oneshot::channel::<i32>();
+    let (c3, p3) = oneshot::channel::<i32>();
+    let (tx, rx) = mpsc::channel();
+    run(future::try_join(future::try_join(p1, p2), p3).map_ok(move |v| tx.send(v).unwrap()));
+    assert!(rx.try_recv().is_err());
+    c1.send(1).unwrap();
+    assert!(rx.try_recv().is_err());
+    c2.send(2).unwrap();
+    assert!(rx.try_recv().is_err());
+    c3.send(3).unwrap();
+    assert_eq!(rx.recv(), Ok(((1, 2), 3)));
+    assert!(rx.recv().is_err());
+
+    std::thread::sleep(std::time::Duration::from_millis(500)); // wait for background threads closed: https://github.com/rust-lang/miri/issues/1371
+}
+
+#[test]
+fn select1() {
+    let (c1, p1) = oneshot::channel::<i32>();
+    let (c2, p2) = oneshot::channel::<i32>();
+    let (tx, rx) = mpsc::channel();
+    run(future::try_select(p1, p2).map_ok(move |v| tx.send(v).unwrap()));
+    assert!(rx.try_recv().is_err());
+    c1.send(1).unwrap();
+    let (v, p2) = rx.recv().unwrap().into_inner();
+    assert_eq!(v, 1);
+    assert!(rx.recv().is_err());
+
+    let (tx, rx) = mpsc::channel();
+    run(p2.map_ok(move |v| tx.send(v).unwrap()));
+    c2.send(2).unwrap();
+    assert_eq!(rx.recv(), Ok(2));
+    assert!(rx.recv().is_err());
+
+    std::thread::sleep(std::time::Duration::from_millis(500)); // wait for background threads closed: https://github.com/rust-lang/miri/issues/1371
+}
+
+#[test]
+fn select2() {
+    let (c1, p1) = oneshot::channel::<i32>();
+    let (c2, p2) = oneshot::channel::<i32>();
+    let (tx, rx) = mpsc::channel();
+    run(future::try_select(p1, p2).map_err(move |v| tx.send((1, v.into_inner().1)).unwrap()));
+    assert!(rx.try_recv().is_err());
+    drop(c1);
+    let (v, p2) = rx.recv().unwrap();
+    assert_eq!(v, 1);
+    assert!(rx.recv().is_err());
+
+    let (tx, rx) = mpsc::channel();
+    run(p2.map_ok(move |v| tx.send(v).unwrap()));
+    c2.send(2).unwrap();
+    assert_eq!(rx.recv(), Ok(2));
+    assert!(rx.recv().is_err());
+
+    std::thread::sleep(std::time::Duration::from_millis(500)); // wait for background threads closed: https://github.com/rust-lang/miri/issues/1371
+}
+
+#[test]
+fn select3() {
+    let (c1, p1) = oneshot::channel::<i32>();
+    let (c2, p2) = oneshot::channel::<i32>();
+    let (tx, rx) = mpsc::channel();
+    run(future::try_select(p1, p2).map_err(move |v| tx.send((1, v.into_inner().1)).unwrap()));
+    assert!(rx.try_recv().is_err());
+    drop(c1);
+    let (v, p2) = rx.recv().unwrap();
+    assert_eq!(v, 1);
+    assert!(rx.recv().is_err());
+
+    let (tx, rx) = mpsc::channel();
+    run(p2.map_err(move |_v| tx.send(2).unwrap()));
+    drop(c2);
+    assert_eq!(rx.recv(), Ok(2));
+    assert!(rx.recv().is_err());
+
+    std::thread::sleep(std::time::Duration::from_millis(500)); // wait for background threads closed: https://github.com/rust-lang/miri/issues/1371
+}
+
+#[test]
+fn select4() {
+    const N: usize = if cfg!(miri) { 100 } else { 10000 };
+
+    let (tx, rx) = mpsc::channel::<oneshot::Sender<i32>>();
+
+    let t = thread::spawn(move || {
+        for c in rx {
+            c.send(1).unwrap();
+        }
+    });
+
+    let (tx2, rx2) = mpsc::channel();
+    for _ in 0..N {
+        let (c1, p1) = oneshot::channel::<i32>();
+        let (c2, p2) = oneshot::channel::<i32>();
+
+        let tx3 = tx2.clone();
+        run(future::try_select(p1, p2).map_ok(move |_| tx3.send(()).unwrap()));
+        tx.send(c1).unwrap();
+        rx2.recv().unwrap();
+        drop(c2);
+    }
+    drop(tx);
+
+    t.join().unwrap();
+
+    std::thread::sleep(std::time::Duration::from_millis(500)); // wait for background threads closed: https://github.com/rust-lang/miri/issues/1371
+}