def test_basic(self):
import _abc
class SomeABC:
pass
_abc._abc_init(SomeABC)
assert hasattr(SomeABC, '__abstractmethods__')
class SomeConcreteSubClass:
pass
_abc._abc_register(SomeABC, SomeConcreteSubClass)
# _abc._abc_instancecheck calls cls.__subclasscheck__, but since
# we've only called _abc_init and haven't set the metaclass, we
# need to monkeypatch SomeABC before calling _abc_instancecheck
from types import MethodType
SomeABC.__subclasscheck__ = MethodType(_abc._abc_subclasscheck,
SomeABC)
assert _abc._abc_instancecheck(SomeABC, SomeConcreteSubClass())
assert _abc._abc_subclasscheck(SomeABC, SomeConcreteSubClass)
class SomeOtherClass:
pass
assert not _abc._abc_instancecheck(SomeABC, SomeOtherClass())
assert not _abc._abc_subclasscheck(SomeABC, SomeOtherClass)
_abc._reset_registry(SomeABC)
_abc._reset_caches(SomeABC)
assert not _abc._abc_instancecheck(SomeABC, SomeConcreteSubClass())
assert not _abc._abc_subclasscheck(SomeABC, SomeConcreteSubClass)
def __instancecheck__(cls, instance):
"""Override for isinstance(instance, cls)."""
return _abc_instancecheck(cls, instance)
def __instancecheck__(cls, instance):
"""Override for isinstance(instance, cls)."""
return _abc_instancecheck(cls, instance)