def test_get_boards_added_or_removed_detects_removed(self):
        mock_offline_boards, mock_online_boards = _make_mbed_boards_for_diff([BOARD_1, BOARD_2], [BOARD_1])
        added, removed = sync_board_database.get_boards_added_or_removed(mock_offline_boards, mock_online_boards)
        self.assertEqual(len(added), 0, "Expect no boards to be added to offline db.")
        self.assertEqual(len(removed), 1, "Expect one board to be removed from offline db.")