def test_event_constructor_button() -> None:
model = Button()
event = events.ModelEvent(model)
assert event._model_id == model.id
def test_event_constructor_plot() -> None:
model = Plot()
event = events.ModelEvent(model)
assert event._model_id == model.id
def test_event_constructor_div() -> None:
model = Div()
event = events.ModelEvent(model)
assert event.model == model
