[Twisted-Python] the right way of unit testing protocols

What is the right way of unit testing protocols in twisted ? Currently, I'm just subclassing my protocol with unittest.TestCase And directly calling the dataRecieved with a string and am checking If the overridden callbacks (like dataRecieved) are called. The tests pass, but back when I was writing threaded servers, I would actually setup a server on localhost and would connect to The server from another thread, for unit testing. That gives me a lot more confidence. I know that I can setup two reactors, for the client and the server and then try to make them talk, But I'm sure there's a shortcut. I just could'nt figure out the test suites from the Twisted sources. Jeethu Rao