def test_repr():
def test_repr(qid: _MeasurementQid):
cirq.testing.assert_equivalent_repr(qid, global_vals={'_MeasurementQid': _MeasurementQid})
test_repr(_MeasurementQid('a', cirq.LineQubit(0)))
test_repr(_MeasurementQid('a', cirq.NamedQubit('x')))
test_repr(_MeasurementQid('a', cirq.NamedQid('x', 4)))
test_repr(_MeasurementQid('a', cirq.GridQubit(2, 3)))
test_repr(_MeasurementQid('0:1:a', cirq.LineQid(9, 4)))
def test_multi_qubit_measurements():
q0, q1 = cirq.LineQubit.range(2)
circuit = cirq.Circuit(
cirq.measure(q0, q1, key='a'),
cirq.X(q0),
cirq.measure(q0, key='b'),
cirq.measure(q1, key='c'),
)
assert_equivalent_to_deferred(circuit)
deferred = cirq.defer_measurements(circuit)
q_ma0 = _MeasurementQid('a', q0)
q_ma1 = _MeasurementQid('a', q1)
cirq.testing.assert_same_circuits(
deferred,
cirq.Circuit(
cirq.CX(q0, q_ma0),
cirq.CX(q1, q_ma1),
cirq.X(q0),
cirq.measure(q_ma0, q_ma1, key='a'),
cirq.measure(q0, key='b'),
cirq.measure(q1, key='c'),
),
)
def test_extra_control_bits():
q0, q1 = cirq.LineQubit.range(2)
circuit = cirq.Circuit(
cirq.measure(q0, key='a'),
cirq.measure(q0, key='b'),
cirq.X(q1).with_classical_controls('a', 'b'),
cirq.measure(q1, key='c'),
)
assert_equivalent_to_deferred(circuit)
deferred = cirq.defer_measurements(circuit)
q_ma = _MeasurementQid('a', q0)
q_mb = _MeasurementQid('b', q0)
cirq.testing.assert_same_circuits(
deferred,
cirq.Circuit(
cirq.CX(q0, q_ma),
cirq.CX(q0, q_mb),
cirq.CCX(q_ma, q_mb, q1),
cirq.measure(q_ma, key='a'),
cirq.measure(q_mb, key='b'),
cirq.measure(q1, key='c'),
),
)
def test_pauli():
q0, q1 = cirq.LineQubit.range(2)
circuit = cirq.Circuit(
cirq.PauliMeasurementGate(cirq.DensePauliString('Y'), key='a').on(q0),
cirq.X(q1).with_classical_controls('a'),
cirq.measure(q1, key='b'),
)
deferred = cirq.defer_measurements(circuit)
q_ma = _MeasurementQid('a', q0)
cirq.testing.assert_same_circuits(
cirq.unroll_circuit_op(deferred),
cirq.Circuit(
cirq.SingleQubitCliffordGate.X_sqrt(q0),
cirq.CX(q0, q_ma),
(cirq.SingleQubitCliffordGate.X_sqrt(q0)**-1),
cirq.Moment(cirq.CX(q_ma, q1)),
cirq.measure(q_ma, key='a'),
cirq.measure(q1, key='b'),
),
)
def test_subcircuit():
q0, q1 = cirq.LineQubit.range(2)
circuit = cirq.Circuit(
cirq.CircuitOperation(
cirq.FrozenCircuit(
cirq.measure(q0, key='a'),
cirq.X(q1).with_classical_controls('a'),
cirq.measure(q1, key='b'),
)))
assert_equivalent_to_deferred(circuit)
deferred = cirq.defer_measurements(circuit)
q_m = _MeasurementQid('a', q0)
cirq.testing.assert_same_circuits(
deferred,
cirq.Circuit(
cirq.CX(q0, q_m),
cirq.CX(q_m, q1),
cirq.measure(q_m, key='a'),
cirq.measure(q1, key='b'),
),
)
