don't clobber factory (#1480)

crossbario · Apr 1, 2021 · fd5530c · fd5530c
1 parent 8286a99
commit fd5530c
Showing 1 changed file with 3 additions and 1 deletion.
diff --git a/autobahn/twisted/testing/__init__.py b/autobahn/twisted/testing/__init__.py
@@ -157,7 +157,9 @@ def open(self, transport_config, options, protocol_class=None):
         client_address = IPv4Address('TCP', '127.0.0.1', 31337)
 
         server_protocol = self._server_protocol()
-        server_protocol.factory = WebSocketServerFactory()
+        # the protocol could already have a factory
+        if getattr(server_protocol, "factory", None) is None:
+            server_protocol.factory = WebSocketServerFactory()
 
         server_transport = iosim.FakeTransport(
             server_protocol, isServer=True,