Vendor dependencies for 0.3.0 release

vendor/async-executor/tests/local_queue.rs

@@ -0,0 +1,24 @@
+use async_executor::Executor;
+use futures_lite::{future, pin};
+
+#[test]
+fn two_queues() {
+    future::block_on(async {
+        // Create an executor with two runners.
+        let ex = Executor::new();
+        let (run1, run2) = (
+            ex.run(future::pending::<()>()),
+            ex.run(future::pending::<()>()),
+        );
+        let mut run1 = Box::pin(run1);
+        pin!(run2);
+
+        // Poll them both.
+        assert!(future::poll_once(run1.as_mut()).await.is_none());
+        assert!(future::poll_once(run2.as_mut()).await.is_none());
+
+        // Drop the first one, which should leave the local queue in the `None` state.
+        drop(run1);
+        assert!(future::poll_once(run2.as_mut()).await.is_none());
+    });
+}