def test_subscribe_no_app():
dispatcher = EventDispatcher()
with pytest.raises(ImproperlyConfigured) as exc_info:
dispatcher.subscribe("invalid type")(lambda _: _) # noqa
assert str(exc_info.value) == "Event dispatcher is not initialized."
def test_event_subscribe_and_dispatch(dispatcher: EventDispatcher):
event_dispatched = DummyEvent()
event_subscribed = None
def handler(event: DummyEvent):
nonlocal event_subscribed
event_subscribed = event
dispatcher.subscribe(DummyEvent, handler)
dispatcher.dispatch(event_dispatched)
assert event_subscribed == event_dispatched
def test_subscribe_invalid_type(dispatcher: EventDispatcher):
with pytest.raises(TypeError):
dispatcher.subscribe("invalid type")(lambda _: _) # noqa