[Twisted-Python] unit testing question: twisted with tk

Russell E. Owen rowen at uw.edu
Wed Jul 18 13:01:06 EDT 2012

I have a bit of code that combines twisted with Tkinter
and now I'd like to write some unittests for it.

I can't seem to figure out how to get TwistedTrial to handle this case. 
I've written a unit test like this:

from twisted.trial import unittest
from twisted.internet.defer import Deferred
import twisted.internet.tksupport
root = Tkinter.Tk()
from twisted.internet import reactor

class TestTkSocket(unittest.TestCase):
    def test...(...):

the one test so far returns a deferred and calls errback on that 
deferred if the test fails, and callback if it succeeds. When I run the 
unit test with trial I get this error error:

I have an identical unit test for a pure-twisted version of my 
communication code (no Tk) and it works fine.

I am guessing the problem is cleanly getting rid of Tkinter's root at 
the end of the test and disentangling it from the reactor, but I have no 
idea how to do that.

Any suggestions on how to proceed (e.g. a way to get TwistedTrial to 
work, or a good alternative)?

-- Russell

More information about the Twisted-Python mailing list