def METHOD_NAME(self):
    storage_device = Mock()
    storage_device.get_byte_size = Mock(
        return_value=1048576
    )
    storage_device.get_uuid = Mock(
        return_value='0815'
    )
    storage_device.get_device = Mock(
        return_value='/dev/some-device'
    )
    storage_device.is_loop = Mock(
        return_value=True
    )
    self.luks = LuksDevice(storage_device)