Expand Up @@ -175,7 +175,7 @@ def __new__(cls, name, bases, namespace):
# This case shouldn't trigger the __classcell__ deprecation warning with check_warnings() as w: warnings.simplefilter("always", DeprecationWarning) warnings.simplefilter("always", Warning) class A(metaclass=Meta): @staticmethod def f(): Expand Down Expand Up @@ -246,22 +246,21 @@ def __new__(cls, name, bases, namespace):
# The default case should continue to work without any warnings with check_warnings() as w: warnings.simplefilter("always", DeprecationWarning) warnings.simplefilter("always", Warning) class WithoutClassRef(metaclass=Meta): pass self.assertEqual(w.warnings, [])
# With zero-arg super() or an explicit __class__ reference, we expect # __build_class__ to emit a DeprecationWarning complaining that # __build_class__ to emit a RuntimeWarning complaining that # __class__ was not set, and asking if __classcell__ was propagated # to type.__new__. # In Python 3.7, that warning will become a RuntimeError. expected_warning = ( '__class__ not set.*__classcell__ propagated', DeprecationWarning RuntimeWarning ) with check_warnings(expected_warning): warnings.simplefilter("always", DeprecationWarning) warnings.simplefilter("always", Warning) class WithClassRef(metaclass=Meta): def f(self): return __class__ Expand All @@ -270,8 +269,8 @@ def f(self):
# Check the warning is turned into an error as expected with warnings.catch_warnings(): warnings.simplefilter("error", DeprecationWarning) with self.assertRaises(DeprecationWarning): warnings.simplefilter("error", RuntimeWarning) with self.assertRaises(RuntimeWarning): class WithClassRef(metaclass=Meta): def f(self): return __class__ Expand Down