tahoe-lafs/src/allmydata/test/test_python2_regressions.py
2019-08-13 15:43:03 -04:00

33 lines
1.2 KiB
Python

"""
Tests to check for Python2 regressions
"""
from twisted.trial import unittest
from twisted.python.modules import getModule
class PythonTwoRegressions(unittest.TestCase):
"""
A test class to hold Python2 regression tests.
"""
skip = "https://tahoe-lafs.org/trac/tahoe-lafs/ticket/3239"
def is_new_style(self, cls):
"""check for being a new-style class"""
# another test could be: issubclass(value, type)
has_class_attr = hasattr(cls, '__class__')
dict_or_slots = '__dict__' in dir(cls) or hasattr(cls, '__slots__')
return has_class_attr and dict_or_slots
def test_old_style_class(self):
"""
Check if all classes are new-style classes
"""
for mod in getModule("allmydata").walkModules():
for attr in mod.iterAttributes():
value = attr.load()
if isinstance(value, str):
# apparently strings are note a new-style class (in Python 2.7)
# so we skip testing them
return
self.assertTrue(self.is_new_style(value),
"{} does not seem to be a new-style class".format(attr.name))