def _initialize(self):
if not is_engine_initialized(self.name):
engine = self.__make_engine()
set_engine(self.name, engine)
else:
engine = get_engine(self.name)
db_name = self._config['db_name']
self.__db = operator.getitem(engine, db_name)
if db_name == 'test':
# Reset the test database.
for coll_name in \
self.__db.collection_names(include_system_collections=False):
self.__db.drop_collection(coll_name)
# Set up the class registry.
for rc in self.registered_resources:
ent_cls = get_entity_class(rc)
if not MongoClassRegistry.is_registered(ent_cls):
MongoClassRegistry.register(ent_cls, self.__db)
def test_register_unregister(self):
class Foo(object):
pass
assert isinstance(MyEntity.parent, MongoInstrumentedAttribute)
with pytest.raises(ValueError):
MongoClassRegistry.unregister(Foo)
assert MongoClassRegistry.is_registered(MyEntity)
# Registering a registered class raises a ValueError.
with pytest.raises(ValueError):
MongoClassRegistry.register(MyEntity, None)
MongoClassRegistry.unregister(MyEntity)
assert not MongoClassRegistry.is_registered(MyEntity)
def tear_down():
MongoClassRegistry.unregister_all()