add test runtime macro (#2409)

actix-http/src/client/pool.rs

@@ -186,6 +186,7 @@ where
                 let mut conn = None;
 
                 // check if there is idle connection for given key.
+                #[allow(clippy::must_not_suspend)]
                 let mut map = inner.available.borrow_mut();
 
                 if let Some(conns) = map.get_mut(&key) {

actix-http/src/h1/encoder.rs

@@ -20,6 +20,7 @@ const AVERAGE_HEADER_SIZE: usize = 30;
 
 #[derive(Debug)]
 pub(crate) struct MessageEncoder<T: MessageType> {
+    #[allow(dead_code)]
     pub length: BodySize,
     pub te: TransferEncoding,
     _phantom: PhantomData<T>,