def test(self):
# Check base class can be sub-classed.
class Event(EventWithTimestamp, EventWithOriginatorID):
pass
class Event2(EventWithTimestamp, EventWithOriginatorID):
pass
# Check subclass can be instantiated with 'originator_id' parameter.
ID1 = uuid4()
ID2 = uuid4()
VALUE1 = 'a string'
VALUE2 = 'another string'
event1 = Event(
originator_id=ID1,
)
self.assertEqual(event1.originator_id, ID1)
# Check event has a domain event ID, and a timestamp.
self.assertTrue(event1.timestamp)
self.assertIsInstance(event1.timestamp, float)
# Check subclass can be instantiated with 'timestamp' parameter.
DOMAIN_EVENT_ID1 = create_timesequenced_event_id()
event2 = Event(
originator_id=ID1,
timestamp=DOMAIN_EVENT_ID1,
)
self.assertEqual(event2.timestamp, DOMAIN_EVENT_ID1)
# Check subclass can be instantiated with other parameters.
event3 = Event(
originator_id=ID1,
an_attribute=VALUE1,
)
self.assertEqual(event3.an_attribute, VALUE1)
# Check the attribute value cannot be changed.
with self.assertRaises(AttributeError):
event3.an_attribute = VALUE2
self.assertEqual(event3.an_attribute, VALUE1)
# Check an event is equal to itself.
self.assertTrue(event3 == event3)
self.assertFalse(event3 != event3)
event4 = Event(
originator_id=ID1,
timestamp=event3.timestamp,
an_attribute=VALUE1,
)
self.assertEqual(event3, event4)
# Check domain events with same domain event ID have the same timestamp.
event5 = Event(
originator_id=event1.originator_id,
timestamp=event1.timestamp,
an_attribute=VALUE1,
)
self.assertEqual(event1.timestamp, event5.timestamp)
# Check it's not equal to different type with same values.
self.assertFalse(event3 == Event2(
originator_id=event3.originator_id,
an_attribute=event3.an_attribute,
))
self.assertTrue(event3 != Event2(
originator_id=ID1,
an_attribute=VALUE1,
))
# Check it's not equal to same type with different values.
# - different originator_id
self.assertNotEqual(event3.originator_id, ID2)
self.assertEqual(event3.an_attribute, VALUE1)
self.assertFalse(event2 == Event(
originator_id=ID2,
an_attribute=VALUE1,
))
# - different attribute value
self.assertTrue(event2 != Event(
originator_id=ID1,
an_attribute=VALUE2,
))
# Check domain events with different domain event IDs have different timestamps.
event4 = Event(
originator_id=ID1,
an_attribute=VALUE1,
)
self.assertNotEqual(event2.timestamp, event4.timestamp)
self.assertNotEqual(event2.timestamp, event4.timestamp)
def test_two_subclasses(self):
# Check base class can be sub-classed.
class Event(EventWithTimestamp, EventWithOriginatorID):
pass
class Event2(EventWithTimestamp, EventWithOriginatorID):
pass
# Check subclass can be instantiated with 'originator_id' parameter.
ID1 = uuid4()
ID2 = uuid4()
VALUE1 = 'a string'
VALUE2 = 'another string'
event1 = Event(originator_id=ID1, )
self.assertEqual(event1.originator_id, ID1)
# Check event has a domain event ID, and a timestamp.
self.assertTrue(event1.timestamp)
self.assertIsInstance(event1.timestamp, float)
# Check subclass can be instantiated with 'timestamp' parameter.
DOMAIN_EVENT_ID1 = create_timesequenced_event_id()
event2 = Event(
originator_id=ID1,
timestamp=DOMAIN_EVENT_ID1,
)
self.assertEqual(event2.timestamp, DOMAIN_EVENT_ID1)
# Check subclass can be instantiated with other parameters.
event3 = Event(
originator_id=ID1,
an_attribute=VALUE1,
)
self.assertEqual(event3.an_attribute, VALUE1)
# Check the attribute value cannot be changed.
with self.assertRaises(AttributeError):
event3.an_attribute = VALUE2
self.assertEqual(event3.an_attribute, VALUE1)
# Check an event is equal to itself.
self.assertTrue(event3 == event3)
self.assertFalse(event3 != event3)
event4 = Event(
originator_id=ID1,
timestamp=event3.timestamp,
an_attribute=VALUE1,
)
self.assertEqual(event3, event4)
# Check domain events with same domain event ID have the same timestamp.
event5 = Event(
originator_id=event1.originator_id,
timestamp=event1.timestamp,
an_attribute=VALUE1,
)
self.assertEqual(event1.timestamp, event5.timestamp)
# Check it's not equal to different type with same values.
self.assertFalse(event3 == Event2(
originator_id=event3.originator_id,
an_attribute=event3.an_attribute,
))
self.assertTrue(event3 != Event2(
originator_id=ID1,
an_attribute=VALUE1,
))
# Check it's not equal to same type with different values.
# - different originator_id
self.assertNotEqual(event3.originator_id, ID2)
self.assertEqual(event3.an_attribute, VALUE1)
self.assertFalse(event2 == Event(
originator_id=ID2,
an_attribute=VALUE1,
))
# - different attribute value
self.assertTrue(event2 != Event(
originator_id=ID1,
an_attribute=VALUE2,
))
# Check domain events with different domain event IDs have different timestamps.
event4 = Event(
originator_id=ID1,
an_attribute=VALUE1,
)
self.assertNotEqual(event2.timestamp, event4.timestamp)
self.assertNotEqual(event2.timestamp, event4.timestamp)