Move /src/test to /tests

tests/ui/async-await/in-trait/async-example-desugared-boxed-in-trait.rs

@@ -0,0 +1,21 @@
+// edition: 2021
+
+#![feature(async_fn_in_trait)]
+#![feature(return_position_impl_trait_in_trait)]
+#![allow(incomplete_features)]
+
+use std::future::Future;
+use std::pin::Pin;
+
+trait MyTrait {
+    fn foo(&self) -> Pin<Box<dyn Future<Output = i32> + '_>>;
+}
+
+impl MyTrait for i32 {
+    async fn foo(&self) -> i32 {
+        //~^ ERROR method `foo` has an incompatible type for trait
+        *self
+    }
+}
+
+fn main() {}