Decorated test methods don't run when trial'ed directly

New submission from ivank <[email protected]>:

When using decorated tests:

{{{
#!python
from twisted.trial import unittest

print "Print works in this environment."

def a_decorator(fn):
        print 'Decorating', fn 
        def newfunc(*args, **kwargs):
                print "I am decorated."
                fn(*args, **kwargs)
        return newfunc

class TestA(unittest.TestCase):
        def test_something(self):
                self.assertEqual(1, 1)
        test_something = a_decorator(test_something)
}}}

`trial decorated_test.TestA` works, but `trial decorated_test.TestA.test_something` does not:

{{{
# trial decorated_test.TestA.test_something
Print works in this environment.
Decorating <function test_something at 0x7f101729d5f0>
Traceback (most recent call last):
  File "/usr/local/bin/trial", line 22, in <module>
    run()
  File "/opt/Python-latest/lib/python2.7/site-packages/twisted/scripts/trial.py", line 328, in run
    suite = _getSuite(config)
  File "/opt/Python-latest/lib/python2.7/site-packages/twisted/scripts/trial.py", line 286, in _getSuite
    return loader.loadByNames(config['tests'], recurse)
  File "/opt/Python-latest/lib/python2.7/site-packages/twisted/trial/runner.py", line 657, in loadByNames
    for thing in set(things)]
  File "/opt/Python-latest/lib/python2.7/site-packages/twisted/trial/runner.py", line 621, in loadAnything
    return self.loadMethod(thing)
  File "/opt/Python-latest/lib/python2.7/site-packages/twisted/trial/runner.py", line 524, in loadMethod
    return self._makeCase(method.im_class, method.__name__)
  File "/opt/Python-latest/lib/python2.7/site-packages/twisted/trial/runner.py", line 527, in _makeCase
    return klass(methodName)
  File "/opt/Python-latest/lib/python2.7/site-packages/twisted/trial/unittest.py", line 672, in __init__
    super(TestCase, self).__init__(methodName)
  File "/opt/Python-latest/lib/python2.7/unittest.py", line 363, in __init__
    (self.__class__, methodName))
ValueError: no such test method in <class 'decorated_test.TestA'>: newfunc

}}}

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Type     : enhancement
Component: trial
Keywords : 
Priority : lowest
Nosy     : 
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http://twistedmatrix.com/trac/ticket/3909