def test_observable_event():
event = Event()
sub1 = None
sub2 = None
def sub_fun_1(x):
nonlocal sub1
sub1 = x
def sub_fun_2(x):
nonlocal sub2
sub2 = x
event.subscribe(sub_fun_1)
event.subscribe(sub_fun_2)
event.trigger(10)
assert sub1 == sub2 == 10
