def test_fix_order_size_dict_negative_max():
d = FixSizeOrderedDict(max_size=-1)
d["test"] = 1
d["test2"] = 2
d["test3"] = 3
del d["test2"]
assert d == {"test": 1, "test3": 3}
def test_fix_order_size_dict_max():
d = FixSizeOrderedDict(max_size=1)
d["test"] = 1
d["test2"] = 2
d["test3"] = 3
with pytest.raises(KeyError):
del d["test2"]
assert d == {"test3": 3}
class ProtectEventStateMachine:
"""A simple state machine for cameras."""
_events: FixSizeOrderedDict[str, Dict[str, Any]]
def __init__(self) -> None:
"""Init the state machine."""
self._events = FixSizeOrderedDict(
max_size=MAX_EVENT_HISTORY_IN_STATE_MACHINE)
def add(self, event_id: str, event_json: Dict[str, Any]) -> None:
"""Add an event to the state machine."""
self._events[event_id] = event_json
def update(self, event_id: str,
new_event_json: Dict[str, Any]) -> Optional[Dict[str, Any]]:
"""Update an event in the state machine and return the merged event."""
event_json = self._events.get(event_id)
if event_json is None:
return None
event_json.update(new_event_json)
return event_json
def __init__(self) -> None:
"""Init the state machine."""
self._events = FixSizeOrderedDict(
max_size=MAX_EVENT_HISTORY_IN_STATE_MACHINE)