Move /src/test to /tests

tests/ui/async-await/async-error-span.rs

@@ -0,0 +1,17 @@
+// edition:2018
+
+// Regression test for issue #62382.
+
+use std::future::Future;
+
+fn get_future() -> impl Future<Output = ()> {
+//~^ ERROR `()` is not a future
+    panic!()
+}
+
+async fn foo() {
+    let a; //~ ERROR type inside `async fn` body must be known in this context
+    get_future().await;
+}
+
+fn main() {}