tabify tests (#3220)

* tabify tests

* move mod tests; up

polkadot/node/network/bridge/src/lib.rs

@@ -64,6 +64,8 @@ use network::{Network, send_message};
 mod multiplexer;
 pub use multiplexer::RequestMultiplexer;
 
+#[cfg(test)]
+mod tests;
 
 /// The maximum amount of heads a peer is allowed to have in their view at any time.
 ///
@@ -1131,9 +1133,3 @@ async fn dispatch_collation_events_to_all<I>(
 
 	ctx.send_messages(events.into_iter().flat_map(messages_for)).await
 }
-
-
-
-
-#[cfg(test)]
-mod tests;