def test_session_is_destroyed_after_rollback(self, test_domain):
uow = UnitOfWork()
uow.start()
uow.rollback()
assert uow._sessions == {}
assert uow.in_progress is False
def test_all_changes_are_discarded_on_rollback(self, test_domain):
repo = test_domain.repository_for(Person)
person_to_be_updated = self.persisted_person(test_domain)
repo.add(person_to_be_updated)
person_dao = test_domain.repository_for(Person)._dao
# Initiate a UnitOfWork Session
uow = UnitOfWork()
uow.start()
repo_with_uow = test_domain.repository_for(Person)
# Create a new person object to be added
person_to_be_added = Person(first_name="John", last_name="Doe")
repo_with_uow.add(person_to_be_added)
# Update an existing Person record
person_to_be_updated.last_name = "FooBar"
repo_with_uow.add(person_to_be_updated)
# Test that the underlying database is untouched
assert len(person_dao.outside_uow().query.all().items) == 1
assert (person_dao.outside_uow().get(person_to_be_updated.id).last_name
!= "FooBar")
uow.rollback()
assert uow.in_progress is False
assert len(person_dao.query.all().items) == 1
assert person_dao.get(person_to_be_updated.id).last_name != "FooBar"
def test_changed_objects_are_committed_as_part_of_one_transaction_on_explicit_commit(
self, test_domain):
# Add a Person the database
repo = test_domain.repository_for(Person)
person_to_be_updated = self.persisted_person(test_domain)
repo.add(person_to_be_updated)
person_dao = test_domain.repository_for(Person)._dao
# Initiate a UnitOfWork Session
uow = UnitOfWork()
uow.start()
repo_with_uow = test_domain.repository_for(Person)
# Create a new person object to be added
person_to_be_added = Person(first_name="John", last_name="Doe")
repo_with_uow.add(person_to_be_added)
# Update an existing Person record
person_to_be_updated.last_name = "FooBar"
repo_with_uow.add(person_to_be_updated)
# Test that the underlying database is untouched
assert len(person_dao.outside_uow().query.all().items) == 1
assert (person_dao.outside_uow().get(person_to_be_updated.id).last_name
!= "FooBar")
uow.commit()
assert uow.in_progress is False
assert len(person_dao.query.all().items) == 2
assert person_dao.get(person_to_be_added.id) is not None
assert person_dao.get(person_to_be_updated.id).last_name == "FooBar"
def test_uow_can_be_initiated_explicitly(self, test_domain):
uow = UnitOfWork()
assert uow is not None
assert uow.in_progress is False
uow.start()
assert uow.in_progress is True
def test_that_uow_can_be_started_manually(self, test_domain):
uow = UnitOfWork()
uow.start()
uow.commit() # `commit` should not raise exception
uow.start()
uow.rollback() # `rollback` should not raise exception