def test_descriptor__get___set___in_proxy_subclass(self):
class Descriptor(object):
value = None
instance = None
cls = None
def __get__(self, instance, cls):
self.cls = cls
return self.value
def __set__(self, instance, value):
self.value = value
self.instance = instance
descriptor = Descriptor()
descriptor.value = "descriptor value"
class Proxy(self._getTargetClass()):
attr = descriptor
proxy = Proxy(object())
self.assertEqual(proxy.attr, "descriptor value")
self.assertEqual(descriptor.cls, Proxy)
proxy.attr = 42
self.assertEqual(descriptor.value, 42)
self.assertEqual(descriptor.instance, proxy)
def test_descriptor__set___only_in_proxy_subclass(self):
class Descriptor(object):
value = None
instance = None
def __set__(self, instance, value):
self.value = value
self.instance = instance
descriptor = Descriptor()
class Proxy(self._getTargetClass()):
attr = descriptor
proxy = Proxy(object())
proxy.attr = 42
self.assertEqual(proxy.attr, descriptor)
self.assertEqual(descriptor.value, 42)
self.assertEqual(descriptor.instance, proxy)