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"""Check that instantiating a class with
`abc.ABCMeta` as metaclass fails if it defines
abstract methods.
"""
# pylint: disable=too-few-public-methods, missing-docstring
# pylint: disable=no-absolute-import, metaclass-assignment
# pylint: disable=abstract-method, import-error, wildcard-import
import abc
from abc import ABCMeta
from lala import Bala
class GoodClass(object):
__metaclass__ = abc.ABCMeta
class SecondGoodClass(object):
__metaclass__ = abc.ABCMeta
def test(self):
""" do nothing. """
class ThirdGoodClass(object):
__metaclass__ = abc.ABCMeta
def test(self):
raise NotImplementedError()
class FourthGoodClass(object):
__metaclass__ = ABCMeta
class BadClass(object):
__metaclass__ = abc.ABCMeta
@abc.abstractmethod
def test(self):
""" do nothing. """
class SecondBadClass(object):
__metaclass__ = abc.ABCMeta
@property
@abc.abstractmethod
def test(self):
""" do nothing. """
class ThirdBadClass(object):
__metaclass__ = ABCMeta
@abc.abstractmethod
def test(self):
pass
class FourthBadClass(ThirdBadClass):
pass
class SomeMetaclass(object):
__metaclass__ = ABCMeta
@abc.abstractmethod
def prop(self):
pass
class FifthGoodClass(SomeMetaclass):
"""Don't consider this abstract if some attributes are
there, but can't be inferred.
"""
prop = Bala # missing
def main():
""" do nothing """
GoodClass()
SecondGoodClass()
ThirdGoodClass()
FourthGoodClass()
BadClass() # [abstract-class-instantiated]
SecondBadClass() # [abstract-class-instantiated]
ThirdBadClass() # [abstract-class-instantiated]
FourthBadClass() # [abstract-class-instantiated]
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