def returns_self_for_a_nullable_type(): assert get_nullable_type(ObjectType) is ObjectType list_of_obj = GraphQLList(ObjectType) assert get_nullable_type(list_of_obj) is list_of_obj
def unwraps_non_null_type(): assert get_nullable_type(GraphQLNonNull(ObjectType)) is ObjectType
def returns_none_for_no_type(): assert get_nullable_type(None) is None