def test_unsubscribe_remaining_listeners(ed):
listener = lambda x: x
listener2 = lambda y: y
ed.subscribe("T1", listener, lambda x: True)
ed.subscribe("T1", listener2, lambda x: True)
ed.unsubscribe("T1", listener)
assert (len(ed.DB["T1"]) == 1)
def test_unsubscribe_empty_listeners(ed):
listener = lambda x: x
ed.subscribe("T1", listener, lambda x: True)
ed.unsubscribe("T1", listener)
assert "T1" not in ed.DB
