def METHOD_NAME(self):
    """
    Test padding of CoulombMatixEig
    """
    max_atoms = 2 * self.num_atoms
    f = CoulombMatrixEig(max_atoms=max_atoms)
    rval = f([self.mol_with_one_conf])
    assert rval.shape == (1, max_atoms)
    rval = f([self.mol_with_one_conf])
    assert rval.shape == (1, max_atoms)
    rval = f([self.mol_with_multi_conf])
    assert rval.shape == (1, self.num_confs, max_atoms)