def test_double_remove():
ac = ActiveConnections()
c = MockConnection()
ac.connections = [c]
ac.remove(c)
ac.remove(c)
assert len(ac.connections) == 0
def test_remove():
ac = ActiveConnections()
c1 = MockConnection()
c2 = MockConnection()
ac.connections = [c1, c2]
ac.remove(c1)
assert c1 not in ac.connections
assert c2 in ac.connections
