def test_single_down(self):
class A(object):
pass
attributes.register_class(A)
mgr_factory = lambda cls: attributes.ClassManager(cls)
class B(A):
__sa_instrumentation_manager__ = staticmethod(mgr_factory)
assert_raises(TypeError, attributes.register_class, B)
def test_diamond_b2(self):
mgr_factory = lambda cls: attributes.ClassManager(cls)
class A(object):
pass
class B1(A):
pass
class B2(A):
__sa_instrumentation_manager__ = mgr_factory
class C(object):
pass
assert_raises(TypeError, attributes.register_class, B2)
def test_single_up(self):
class A(object):
pass
# delay registration
mgr_factory = lambda cls: attributes.ClassManager(cls)
class B(A):
__sa_instrumentation_manager__ = staticmethod(mgr_factory)
attributes.register_class(B)
assert_raises_message(TypeError,
"multiple instrumentation implementations",
attributes.register_class, A)
def test_none(self):
class A(object):
pass
attributes.register_class(A)
mgr_factory = lambda cls: attributes.ClassManager(cls)
class B(object):
__sa_instrumentation_manager__ = staticmethod(mgr_factory)
attributes.register_class(B)
class C(object):
__sa_instrumentation_manager__ = attributes.ClassManager
attributes.register_class(C)
def test_diamond_b1(self):
mgr_factory = lambda cls: attributes.ClassManager(cls)
class A(object):
pass
class B1(A):
pass
class B2(A):
__sa_instrumentation_manager__ = staticmethod(mgr_factory)
class C(object):
pass
assert_raises_message(TypeError,
"multiple instrumentation implementations",
attributes.register_class, B1)
