def METHOD_NAME(buffer_connection):
    from moler.device.unixlocal import UnixLocal
    dev1 = UnixLocal(io_connection=buffer_connection)
    dev2 = UnixLocal(io_connection=buffer_connection)
    dev1.add_neighbour_device(neighbour_device=dev2, bidirectional=False)
    neighbour_devices = dev1.get_neighbour_devices(device_type=UnixLocal)
    assert 1 == len(neighbour_devices)
    neighbour_devices = dev2.get_neighbour_devices(device_type=UnixLocal)
    assert 0 == len(neighbour_devices)