servicetest.py contains the following:

    # hack to ease debugging
    domish.Element.__repr__ = domish.Element.toXml

The intention is that code like:

    assert element['foo'] == bar, element

should produce the stringified xml of element when the assertion fails.  This does not in fact work, as assert uses str() not repr().

Overriding __str__ in the same way yields bizarro exceptions:

Traceback (most recent call last):
  File "/build/buildd/python2.4-2.4.5/Modules/pyexpat.c", line 639, in EndElement
    
  File "/usr/lib/python2.4/site-packages/twisted/words/xish/domish.py", line 780, in _onEndElement
    self.ElementEvent(self.currElem)
  File "/usr/lib/python2.4/site-packages/twisted/words/xish/xmlstream.py", line 106, in onElement
    self.dispatch(element)
  File "/usr/lib/python2.4/site-packages/twisted/words/xish/utility.py", line 316, in dispatch
    callbacklist.callback(obj)
--- <exception caught here> ---
  File "/usr/lib/python2.4/site-packages/twisted/words/xish/utility.py", line 106, in callback
    methodwrapper(*args, **kwargs)
  File "/usr/lib/python2.4/site-packages/twisted/words/xish/utility.py", line 27, in __call__
    self.method(*nargs, **nkwargs)
  File "/home/will/src/Telepathy/telepathy-gabble/tests/twisted/gabbletest.py", line 75, in secondIq
    assert map(str, username) == [self.username]
exceptions.AssertionError: 
Traceback (most recent call last):
  File "/home/will/src/Telepathy/telepathy-gabble/tests/twisted/gabbletest.py", line 316, in exec_test_deferred
    fun(queue, bus, conn, stream)
  File "./muc/test-muc.py", line 16, in test
    q.expect('dbus-signal', signal='StatusChanged', args=[0, 1])
  File "/home/will/src/Telepathy/telepathy-gabble/tests/twisted/servicetest.py", line 217, in expect
    event = self.wait()
  File "/home/will/src/Telepathy/telepathy-gabble/tests/twisted/servicetest.py", line 286, in wait
    raise TimeoutError
TimeoutError