'lo all,

I've been doing some work with the twisted.mail.imap4 module, and its 
associated unit tests (in order to learn the code more, I'm tackling a few of 
the outstanding tickets).

When running those tests, I'd often like to log all the server/client 
interaction.  I managed to do so by way of hacking the code in 
twisted.protocols.loopback, but that feels pretty wrong.  What's a good way to 
get all the interaction logged?

To be more specific, the tests in question (e.g. test_imap.NewFetchTestCase), 
do a lot of:

    d = loopback.loopbackTCP(self.server, self.client, noisy=False)
    d.addCallback(lambda x : self.assertEqual(self.result, self.expected))
    return d

What's a Good Way to get all the traffic going over that loopback logged?  
Setting noisy to True merely gets it to log some protocol startup/teardown-type 
messages.  

Or: given that I've figured out how to hack loopback.lookupbackTCP, if there's 
general utility, I can certainly add a keyword arg to trigger logging of all 
messages, e.g. logAll=False (I'm trying to find something which feels 
meaningfully different from 'noisy', because it would seem Very Wrong Indeed to 
make noisy suddenly produce vastly more log output).  Is that something people 
might be interested in?

Thanks,
-Dan
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