def test_unsubscribe_all_without_topic(ed):
listener = lambda x: x
listener2 = lambda y: y
ed.subscribe("T1", listener, lambda x: True)
ed.subscribe("T2", listener2, lambda x: True)
ed.unsubscribe_all()
assert not ed.DB
def test_unsubscribe_all_with_Topic(ed):
listener = lambda x: x
listener2 = lambda y: y
ed.subscribe("T1", listener, lambda x: True)
ed.subscribe("T2", listener2, lambda x: True)
ed.unsubscribe_all("T1")
assert ("T1" not in ed.DB and len(ed.DB["T2"]) == 1)