def test_event_mutate_raises_version_error(self):
a = Aggregate()
# Try to mutate aggregate with an invalid domain event.
event = AggregateEvent(
originator_id=a.id,
originator_version=a.version, # NB not +1.
timestamp=datetime.now(tz=TZINFO),
)
# Check raises "VersionError".
with self.assertRaises(VersionError):
event.mutate(a)
def test_event_mutate_raises_originator_id_error(self):
a = Aggregate()
# Try to mutate aggregate with an invalid domain event.
event = AggregateEvent(
originator_id=uuid4(),
originator_version=a.version + 1,
timestamp=AggregateEvent.create_timestamp(),
)
# Check raises "VersionError".
with self.assertRaises(OriginatorIDError):
event.mutate(a)
def test(self):
# Define fixture that receives prompts.
class FollowerFixture(Promptable):
def __init__(self):
self.num_prompts = 0
def receive_prompt(self, leader_name: str) -> None:
self.num_prompts += 1
# Test fixture is working.
follower = FollowerFixture()
follower.receive_prompt("")
self.assertEqual(follower.num_prompts, 1)
# Construct leader.
leader = Leader()
leader.lead(follower)
# Check follower receives a prompt when there are new events.
leader.notify([
AggregateEvent(
originator_id=uuid4(),
originator_version=0,
timestamp=datetime.now(),
)
])
self.assertEqual(follower.num_prompts, 2)
# Check follower doesn't receive prompt when no new events.
leader.notify([])
self.assertEqual(follower.num_prompts, 2)