Fix test when upgrade is unsupported.

Author: ioquatix

lib/rack/conform/application.rb

@@ -97,12 +97,13 @@ def test_streaming_enumerator(env)
 			end
 
 			def test_websocket_echo(env)
+				puts env.inspect
 				Async::WebSocket::Adapters::Rack.open(env) do |connection|
 					while message = connection.read
 						connection.write(message)
 					end
 					connection.close
-				end or Protocol::HTTP::Response[404, {}, []]
+				end or [404, {}, []]
 			end
 
 			private

test/rack/conform/websocket.rb

@@ -22,5 +22,8 @@
 		ensure
 			connection.close
 		end
+	rescue Async::WebSocket::ProtocolError => error
+		# It's acceptable to not support WebSockets.
+		raise unless error.message == "Failed to negotiate connection: 404"
 	end
 end