def test_with_snapshot_store(self) -> None:
transcoder = JSONTranscoder()
transcoder.register(UUIDAsHex())
transcoder.register(DecimalAsStr())
transcoder.register(DatetimeAsISO())
transcoder.register(EmailAddressAsStr())
event_recorder = SQLiteAggregateRecorder(SQLiteDatastore(":memory:"))
event_recorder.create_table()
event_store: EventStore[Aggregate.Event] = EventStore(
mapper=Mapper(transcoder=transcoder),
recorder=event_recorder,
)
snapshot_recorder = SQLiteAggregateRecorder(SQLiteDatastore(":memory:"))
snapshot_recorder.create_table()
snapshot_store: EventStore[Snapshot] = EventStore(
mapper=Mapper(transcoder=transcoder),
recorder=snapshot_recorder,
)
repository: Repository = Repository(event_store, snapshot_store)
# Check key error.
with self.assertRaises(AggregateNotFound):
repository.get(uuid4())
# Open an account.
account = BankAccount.open(
full_name="Alice",
email_address="*****@*****.**",
)
# Credit the account.
account.append_transaction(Decimal("10.00"))
account.append_transaction(Decimal("25.00"))
account.append_transaction(Decimal("30.00"))
# Collect pending events.
pending = account.collect_events()
# Store pending events.
event_store.put(pending)
copy = repository.get(account.id)
assert isinstance(copy, BankAccount)
# Check copy has correct attribute values.
assert copy.id == account.id
assert copy.balance == Decimal("65.00")
snapshot = Snapshot(
originator_id=account.id,
originator_version=account.version,
timestamp=datetime.now(tz=TZINFO),
topic=get_topic(type(account)),
state=account.__dict__,
)
snapshot_store.put([snapshot])
copy2 = repository.get(account.id)
assert isinstance(copy2, BankAccount)
# Check copy has correct attribute values.
assert copy2.id == account.id
assert copy2.balance == Decimal("65.00")
# Credit the account.
account.append_transaction(Decimal("10.00"))
event_store.put(account.collect_events())
# Check copy has correct attribute values.
copy3 = repository.get(account.id)
assert isinstance(copy3, BankAccount)
assert copy3.id == account.id
assert copy3.balance == Decimal("75.00")
# Check can get old version of account.
copy4 = repository.get(account.id, version=copy.version)
assert isinstance(copy4, BankAccount)
assert copy4.balance == Decimal("65.00")
copy5 = repository.get(account.id, version=1)
assert isinstance(copy5, BankAccount)
assert copy5.balance == Decimal("0.00")
copy6 = repository.get(account.id, version=2)
assert isinstance(copy6, BankAccount)
assert copy6.balance == Decimal("10.00")
copy7 = repository.get(account.id, version=3)
assert isinstance(copy7, BankAccount)
assert copy7.balance == Decimal("35.00"), copy7.balance
copy8 = repository.get(account.id, version=4)
assert isinstance(copy8, BankAccount)
assert copy8.balance == Decimal("65.00"), copy8.balance
def test(self):
# Construct transcoder.
transcoder = JSONTranscoder()
transcoder.register(UUIDAsHex())
transcoder.register(DecimalAsStr())
transcoder.register(DatetimeAsISO())
# Construct cipher.
environment = Environment()
environment[AESCipher.CIPHER_KEY] = AESCipher.create_key(16)
cipher = AESCipher(environment)
# Construct compressor.
compressor = ZlibCompressor()
# Construct mapper with cipher.
mapper = Mapper(transcoder=transcoder, cipher=cipher)
# Create a domain event.
domain_event = BankAccount.TransactionAppended(
originator_id=uuid4(),
originator_version=123456,
timestamp=BankAccount.TransactionAppended.create_timestamp(),
amount=Decimal("10.00"),
)
# Map from domain event.
stored_event = mapper.from_domain_event(domain_event)
# Map to domain event.
copy = mapper.to_domain_event(stored_event)
# Check values are not visible.
assert "Alice" not in str(stored_event.state)
# Check decrypted copy has correct values.
assert copy.originator_id == domain_event.originator_id
assert copy.originator_version == domain_event.originator_version
assert copy.timestamp == domain_event.timestamp, copy.timestamp
assert copy.originator_version == domain_event.originator_version
assert len(stored_event.state) == 162, len(stored_event.state)
# Construct mapper with cipher and compressor.
mapper = Mapper(
transcoder=transcoder,
cipher=cipher,
compressor=compressor,
)
# Map from domain event.
stored_event = mapper.from_domain_event(domain_event)
# Map to domain event.
copy = mapper.to_domain_event(stored_event)
# Check decompressed copy has correct values.
assert copy.originator_id == domain_event.originator_id
assert copy.originator_version == domain_event.originator_version
assert len(stored_event.state) in (
135,
136,
137,
138,
139,
140,
141,
142,
143,
), len(stored_event.state)
