Use if let for single variant matching

Author: thomaseizinger

swarm/src/connection.rs

@@ -934,14 +934,11 @@ mod tests {
                 Self::OutboundOpenInfo,
             >,
         ) {
-            match event {
-                ConnectionEvent::ProtocolsChange(ProtocolsChange { protocols }) => {
-                    self.reported_protocols = protocols
-                        .iter()
-                        .map(|b| std::str::from_utf8(b).unwrap().to_owned())
-                        .collect();
-                }
-                _ => {}
+            if let ConnectionEvent::ProtocolsChange(ProtocolsChange { protocols }) = event {
+                self.reported_protocols = protocols
+                    .iter()
+                    .map(|b| std::str::from_utf8(b).unwrap().to_owned())
+                    .collect();
             }
         }