def test_update():
bck = DictBackend()
evt = Event(GenericEventType(), dict(foo='bar'))
bck.create(evt)
assert len(bck._db) == 1
# updating nothing leads to an exception
with pytest.raises(AssertionError):
bck.update(None)
pytest.fail()
# updating events with null id is idempotent
former_evt0_id = evt.id
evt.id = None
bck.update(evt)
assert len(bck._db) == 1
result = bck.read(former_evt0_id)
assert result == evt # event was unchanged
assert result.owner is None
# actual update
evt.owner = 'me'
bck.update(evt)
assert len(bck._db) == 1
result = bck.read(former_evt0_id)
assert result.owner == 'me'
def test_create():
bck = DictBackend()
assert len(bck._db) == 0
# adding nothing leads to an exception
with pytest.raises(AssertionError):
bck.create(None)
pytest.fail()
# adding events with null id
evt0 = Event(GenericEventType(), dict(foo='bar'))
evt0.id = None
bck.create(evt0)
assert len(bck._db) == 0
# fresh add
evt1 = Event(GenericEventType(), dict(foo='bar'))
bck.create(evt1)
assert len(bck._db) == 1
# adding twice the same event is idempotent
bck.create(evt1)
assert len(bck._db) == 1
