def METHOD_NAME(self):
    """Test for single register operator."""
    with self.subTest("test +"):
        op = FermionicOp({"+_0": 1}, num_spin_orbitals=1)
        expected = SparsePauliOp.from_list([("X", 0.5), ("Y", -0.5j)])
        self.assertEqualSparsePauliOp(JordanWignerMapper().map(op), expected)
    with self.subTest("test -"):
        op = FermionicOp({"-_0": 1}, num_spin_orbitals=1)
        expected = SparsePauliOp.from_list([("X", 0.5), ("Y", 0.5j)])
        self.assertEqualSparsePauliOp(JordanWignerMapper().map(op), expected)
    with self.subTest("test N"):
        op = FermionicOp({"+_0 -_0": 1}, num_spin_orbitals=1)
        expected = SparsePauliOp.from_list([("I", 0.5), ("Z", -0.5)])
        self.assertEqualSparsePauliOp(JordanWignerMapper().map(op), expected)
    with self.subTest("test E"):
        op = FermionicOp({"-_0 +_0": 1}, num_spin_orbitals=1)
        expected = SparsePauliOp.from_list([("I", 0.5), ("Z", 0.5)])
        self.assertEqualSparsePauliOp(JordanWignerMapper().map(op), expected)
    with self.subTest("test I"):
        op = FermionicOp({"": 1}, num_spin_orbitals=1)
        expected = SparsePauliOp.from_list([("I", 1)])
        self.assertEqualSparsePauliOp(JordanWignerMapper().map(op), expected)
    with self.subTest("test parameters"):
        a = Parameter("a")
        op = FermionicOp({"+_0": a})
        expected = SparsePauliOp.from_list([("X", 0.5 * a), ("Y", -0.5j * a)], dtype=object)
        qubit_op = JordanWignerMapper().map(op)
        self.assertEqual(qubit_op, expected)