Vendor dependencies

Let's see how I like this workflow.

vendor/tokio/tests/sync_notify.rs

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+#![warn(rust_2018_idioms)]
+#![cfg(feature = "sync")]
+
+#[cfg(tokio_wasm_not_wasi)]
+use wasm_bindgen_test::wasm_bindgen_test as test;
+
+use tokio::sync::Notify;
+use tokio_test::task::spawn;
+use tokio_test::*;
+
+trait AssertSend: Send + Sync {}
+impl AssertSend for Notify {}
+
+#[test]
+fn notify_notified_one() {
+    let notify = Notify::new();
+    let mut notified = spawn(async { notify.notified().await });
+
+    notify.notify_one();
+    assert_ready!(notified.poll());
+}
+
+#[test]
+fn notified_one_notify() {
+    let notify = Notify::new();
+    let mut notified = spawn(async { notify.notified().await });
+
+    assert_pending!(notified.poll());
+
+    notify.notify_one();
+    assert!(notified.is_woken());
+    assert_ready!(notified.poll());
+}
+
+#[test]
+fn notified_multi_notify() {
+    let notify = Notify::new();
+    let mut notified1 = spawn(async { notify.notified().await });
+    let mut notified2 = spawn(async { notify.notified().await });
+
+    assert_pending!(notified1.poll());
+    assert_pending!(notified2.poll());
+
+    notify.notify_one();
+    assert!(notified1.is_woken());
+    assert!(!notified2.is_woken());
+
+    assert_ready!(notified1.poll());
+    assert_pending!(notified2.poll());
+}
+
+#[test]
+fn notify_notified_multi() {
+    let notify = Notify::new();
+
+    notify.notify_one();
+
+    let mut notified1 = spawn(async { notify.notified().await });
+    let mut notified2 = spawn(async { notify.notified().await });
+
+    assert_ready!(notified1.poll());
+    assert_pending!(notified2.poll());
+
+    notify.notify_one();
+
+    assert!(notified2.is_woken());
+    assert_ready!(notified2.poll());
+}
+
+#[test]
+fn notified_drop_notified_notify() {
+    let notify = Notify::new();
+    let mut notified1 = spawn(async { notify.notified().await });
+    let mut notified2 = spawn(async { notify.notified().await });
+
+    assert_pending!(notified1.poll());
+
+    drop(notified1);
+
+    assert_pending!(notified2.poll());
+
+    notify.notify_one();
+    assert!(notified2.is_woken());
+    assert_ready!(notified2.poll());
+}
+
+#[test]
+fn notified_multi_notify_drop_one() {
+    let notify = Notify::new();
+    let mut notified1 = spawn(async { notify.notified().await });
+    let mut notified2 = spawn(async { notify.notified().await });
+
+    assert_pending!(notified1.poll());
+    assert_pending!(notified2.poll());
+
+    notify.notify_one();
+
+    assert!(notified1.is_woken());
+    assert!(!notified2.is_woken());
+
+    drop(notified1);
+
+    assert!(notified2.is_woken());
+    assert_ready!(notified2.poll());
+}
+
+#[test]
+fn notify_in_drop_after_wake() {
+    use futures::task::ArcWake;
+    use std::future::Future;
+    use std::sync::Arc;
+
+    let notify = Arc::new(Notify::new());
+
+    struct NotifyOnDrop(Arc<Notify>);
+
+    impl ArcWake for NotifyOnDrop {
+        fn wake_by_ref(_arc_self: &Arc<Self>) {}
+    }
+
+    impl Drop for NotifyOnDrop {
+        fn drop(&mut self) {
+            self.0.notify_waiters();
+        }
+    }
+
+    let mut fut = Box::pin(async {
+        notify.notified().await;
+    });
+
+    {
+        let waker = futures::task::waker(Arc::new(NotifyOnDrop(notify.clone())));
+        let mut cx = std::task::Context::from_waker(&waker);
+        assert!(fut.as_mut().poll(&mut cx).is_pending());
+    }
+
+    // Now, notifying **should not** deadlock
+    notify.notify_waiters();
+}
+
+#[test]
+fn notify_one_after_dropped_all() {
+    let notify = Notify::new();
+    let mut notified1 = spawn(async { notify.notified().await });
+
+    assert_pending!(notified1.poll());
+
+    notify.notify_waiters();
+    notify.notify_one();
+
+    drop(notified1);
+
+    let mut notified2 = spawn(async { notify.notified().await });
+
+    assert_ready!(notified2.poll());
+}
+
+#[test]
+fn test_notify_one_not_enabled() {
+    let notify = Notify::new();
+    let mut future = spawn(notify.notified());
+
+    notify.notify_one();
+    assert_ready!(future.poll());
+}
+
+#[test]
+fn test_notify_one_after_enable() {
+    let notify = Notify::new();
+    let mut future = spawn(notify.notified());
+
+    future.enter(|_, fut| assert!(!fut.enable()));
+
+    notify.notify_one();
+    assert_ready!(future.poll());
+    future.enter(|_, fut| assert!(fut.enable()));
+}
+
+#[test]
+fn test_poll_after_enable() {
+    let notify = Notify::new();
+    let mut future = spawn(notify.notified());
+
+    future.enter(|_, fut| assert!(!fut.enable()));
+    assert_pending!(future.poll());
+}
+
+#[test]
+fn test_enable_after_poll() {
+    let notify = Notify::new();
+    let mut future = spawn(notify.notified());
+
+    assert_pending!(future.poll());
+    future.enter(|_, fut| assert!(!fut.enable()));
+}
+
+#[test]
+fn test_enable_consumes_permit() {
+    let notify = Notify::new();
+
+    // Add a permit.
+    notify.notify_one();
+
+    let mut future1 = spawn(notify.notified());
+    future1.enter(|_, fut| assert!(fut.enable()));
+
+    let mut future2 = spawn(notify.notified());
+    future2.enter(|_, fut| assert!(!fut.enable()));
+}
+
+#[test]
+fn test_waker_update() {
+    use futures::task::noop_waker;
+    use std::future::Future;
+    use std::task::Context;
+
+    let notify = Notify::new();
+    let mut future = spawn(notify.notified());
+
+    let noop = noop_waker();
+    future.enter(|_, fut| assert_pending!(fut.poll(&mut Context::from_waker(&noop))));
+
+    assert_pending!(future.poll());
+    notify.notify_one();
+
+    assert!(future.is_woken());
+}