'When a connection is made the ``ControlAMP`` is added to the services
set of connections.'

def test_connection_made(self):

    marker = object()
    self.control_amp_service._connections.add(marker)
    current = self.control_amp_service._connections.copy()
    self.protocol.makeConnection(StringTransportWithAbort())
    self.assertEqual((current, self.control_amp_service._connections), ({marker}, {marker, self.protocol}))
