def METHOD_NAME(self):
    cell = gto.Cell()
    cell.atom = """
        Li    5.281899    1.082489    0.642479
        Li   18.499727    3.791392    2.250266
    """
    cell.a = [[8.3774538040, 0.0000000000, 0.0000000000],
              [7.7020859454, 3.2953913771, 0.0000000000],
              [7.7020859454, 1.5784896835, 2.8927451749]]
    cell.build()
    sg = spg.SpaceGroup(cell)
    sg.build()
    ops = sg.ops
    self.assertTrue(sg.groupname['point_group_symbol'] == '-3m')
    sg.backend = 'spglib'
    sg.build()
    ops0 = sg.ops
    for op,op0 in zip(ops, ops0):
        self.assertTrue(op == op0)