def test_identity_operation_init():
q = cirq.NamedQubit('q')
I = cirq.IdentityOperation([q])
assert I.qubits == (q, )
I = cirq.IdentityOperation(q)
assert I.qubits == (q, )
def test_identity_operation_repr():
a, b = cirq.LineQubit.range(2)
assert repr(cirq.IdentityOperation(
(a, ))) == ('cirq.I.on(cirq.LineQubit(0))')
assert repr(cirq.IdentityOperation((a, b))) == (
'cirq.IdentityOperation(qubits=[cirq.LineQubit(0), cirq.LineQubit(1)])'
)
def test_invalid_identity_operation():
three_qubit_gate = cirq.ThreeQubitGate()
with pytest.raises(ValueError, match="empty set of qubits"):
cirq.IdentityOperation([])
with pytest.raises(ValueError,
match="Gave non-Qid objects to IdentityOperation"):
cirq.IdentityOperation([three_qubit_gate])
def test_identity_operation_deprecated():
a, b = cirq.LineQubit.range(2)
with capture_logging() as log:
actual = cirq.IdentityOperation([a, b])
assert len(log) == 1 # May fail if deprecated thing is used elsewhere.
assert 'IdentityOperation' in log[0].getMessage()
assert 'deprecated' in log[0].getMessage()
assert actual == cirq.IdentityGate(2).on(a, b)
cirq.GridQubit(10, 11),
'H':
cirq.H,
'HPowGate': [cirq.HPowGate(exponent=-8), cirq.H**0.123],
'I':
cirq.I,
'ISWAP':
cirq.ISWAP,
'ISwapPowGate': [cirq.ISwapPowGate(exponent=-8), cirq.ISWAP**0.123],
'IdentityGate': [
cirq.I,
cirq.IdentityGate(num_qubits=5),
cirq.IdentityGate(num_qubits=5, qid_shape=(3, ) * 5)
],
'IdentityOperation': [
cirq.IdentityOperation(cirq.LineQubit.range(2)),
cirq.IdentityOperation(cirq.LineQubit.range(5))
],
'LineQubit': [cirq.LineQubit(0), cirq.LineQubit(123)],
'LineQid': [cirq.LineQid(0, 1),
cirq.LineQid(123, 2),
cirq.LineQid(-4, 5)],
'MeasurementGate': [
cirq.MeasurementGate(num_qubits=3, key='z'),
cirq.MeasurementGate(num_qubits=3,
key='z',
invert_mask=(True, False, True)),
cirq.MeasurementGate(num_qubits=3,
key='z',
invert_mask=(True, False),
qid_shape=(1, 2, 3)),
def test_identity_operation_str():
a, b = cirq.LineQubit.range(2)
assert str(cirq.IdentityOperation((a, ))) == ('I(0)')
assert str(cirq.IdentityOperation((a, b))) == ('I(0, 1)')
def test_with_qubits_and_transform_qubits():
op = cirq.IdentityOperation(cirq.LineQubit.range(3))
assert op.with_qubits(*cirq.LineQubit.range(3, 0, -1)) \
== cirq.IdentityOperation(cirq.LineQubit.range(3, 0, -1))