TypeError in python.py:_getobj when having a TestCase namedtuple #1579
Description
parametrizing a test function fails in case the argument for the function is only an empty list:
@pytest.mark.parametrize('test_cases', [
([], )
])
def test_read_write_roundtrip(test_cases):
passfails with:
/media/local_data/jwienke/miniconda2/envs/monitoring/lib/python2.7/site-packages/_pytest/runner.py:150: in __init__
self.result = func()
/media/local_data/jwienke/miniconda2/envs/monitoring/lib/python2.7/site-packages/_pytest/main.py:435: in _memocollect
return self._memoizedcall('_collected', lambda: list(self.collect()))
/media/local_data/jwienke/miniconda2/envs/monitoring/lib/python2.7/site-packages/_pytest/main.py:315: in _memoizedcall
res = function()
/media/local_data/jwienke/miniconda2/envs/monitoring/lib/python2.7/site-packages/_pytest/main.py:435: in <lambda>
return self._memoizedcall('_collected', lambda: list(self.collect()))
/media/local_data/jwienke/miniconda2/envs/monitoring/lib/python2.7/site-packages/_pytest/python.py:685: in collect
self.session._fixturemanager.parsefactories(self)
/media/local_data/jwienke/miniconda2/envs/monitoring/lib/python2.7/site-packages/_pytest/python.py:1969: in parsefactories
holderobj = node_or_obj.obj
/media/local_data/jwienke/miniconda2/envs/monitoring/lib/python2.7/site-packages/_pytest/python.py:351: in fget
self._obj = obj = self._getobj()
/media/local_data/jwienke/miniconda2/envs/monitoring/lib/python2.7/site-packages/_pytest/python.py:681: in _getobj
obj = self.parent.obj()
E TypeError: __new__() takes exactly 4 arguments (1 given)
astroid (1.4.4)
backports.shutil-get-terminal-size (1.0.0)
backports.ssl-match-hostname (3.4.0.2)
coverage (4.1)
cycler (0.10.0)
decorator (4.0.9)
enum34 (1.1.3)
futures (3.0.5)
greenlet (0.4.9)
ipython (4.2.0)
ipython-genutils (0.1.0)
jenkinsapi (0.2.30)
junit-xml (1.6)
lazy-object-proxy (1.2.1)
loggerbyclass (0.2.0)
logilab-common (1.0.2)
matplotlib (1.5.1)
monitoring-lib (0.1.0)
msgpack-python (0.4.7)
neovim (0.1.7)
nose (1.3.7)
numexpr (2.5.2)
numpy (1.11.0)
pandas (0.18.1)
path.py (0.0.0)
patsy (0.4.1)
pep8 (1.7.0)
perfmonvalidation (0.3)
pexpect (4.0.1)
pickleshare (0.5)
pip (7.1.2)
protobuf (2.5.0)
ptyprocess (0.5)
py (1.4.31)
pybtex (0.19)
pycairo (1.10.0)
pylint (1.5.4)
pyparsing (2.1.1)
pytest (2.9.1)
python-dateutil (2.5.2)
pytz (2016.3)
requests (2.10.0)
rsb-python (0.13.0)
rsbag-python (0.13.1)
rst (0.13.0)
rstsandbox (0.13.0)
rststable (0.13.5)
scikit-learn (0.17.1)
scipy (0.17.1)
seaborn (0.7.0)
setuptools (20.7.0)
simplegeneric (0.8.1)
singledispatch (3.4.0.3)
six (1.10.0)
statsmodels (0.6.1)
tables (3.2.2)
traitlets (4.2.1)
trollius (2.1)
websocket-client (0.34.0)
wheel (0.29.0)
wrapt (1.10.6)
Running on ubuntu trusty 64 bit with miniconda python:
Python 2.7.11 :: Continuum Analytics, Inc.