def test_add_family(self):
cell = Cell(self.db_)
cell.init_based_on_id(1)
cell.clear_family()
cell.add_to_family('SingleTx')
self.assertEqual('SingleTx', cell.get_family())
# check adding same content twice, this should not affect the value
cell.add_to_family('SingleTx')
self.assertEqual('SingleTx', cell.get_family())
cell.clear_family()
