def test_transaction_snapshots(historian: mincepy.Historian):
class ThirdPartyPerson:
"""A class from a third party library"""
def __init__(self, name):
self.name = name
class PersonHelper(mincepy.TypeHelper):
TYPE_ID = uuid.UUID('62d8c767-14bc-4437-a9a3-ca5d0ce65d9b')
TYPE = ThirdPartyPerson
INJECT_CREATION_TRACKING = True
def yield_hashables(self, obj, hasher):
yield from hasher.yield_hashables(obj.name)
def eq(self, one, other) -> bool:
return one.name == other.name
def save_instance_state(self, obj, saver):
return obj.name
def load_instance_state(self, obj, saved_state, loader):
obj.name = saved_state.name
person_helper = PersonHelper()
historian.register_type(person_helper)
person_maker = mincepy.Process('person maker')
with person_maker.running():
martin = ThirdPartyPerson('Martin')
historian.save(martin)
assert historian.created_by(martin) == historian.get_obj_id(person_maker)
def test_basic_save_process(historian: mincepy.Historian):
proc = mincepy.Process('test_basic_save')
pid = historian.save(proc)
with proc.running():
car = testing.Car('nissan', 'white')
car_id = historian.save(car)
assert historian.created_by(car) == pid
assert historian.get_creator(car) is proc
assert historian.get_creator(car_id) is proc
second_car = testing.Car('ford')
historian.save(second_car)
assert historian.created_by(second_car) is None
# Now check we can get the creator id from the object id
del car
assert historian.created_by(car_id) == pid
assert historian.get_creator(car_id) is proc
def test_save_after_creation(historian: mincepy.Historian):
"""
Test saving an object that was created inside a process context but then saved
outside it. The creator should still be correctly set
"""
proc = mincepy.Process('test_delayed_save')
proc.save()
with proc.running():
# Create the car
car = testing.Car('nissan', 'white')
# Save it
historian.save(car)
created_in = historian.created_by(car)
assert created_in is not None
assert created_in == historian.get_current_record(proc).obj_id
