def test_qubit_management_error():
eng = MainEngine(backend=DummyEngine(), engine_list=[DummyEngine()])
with _compute.Compute(eng):
ancilla = eng.allocate_qubit()
eng.active_qubits = weakref.WeakSet()
with pytest.raises(_compute.QubitManagementError):
_compute.Uncompute(eng)
def test_ionq_no_midcircuit_measurement(monkeypatch, mapper_factory):
"""Test that attempts to measure mid-circuit raise exceptions."""
def mock_send(*args, **kwargs):
return {
'nq': 1,
'shots': 10,
'output_probs': {
'0': 0.4,
'1': 0.6
},
}
monkeypatch.setattr(_ionq_http_client, "send", mock_send)
# Create a backend to use with an engine.
backend = _ionq.IonQBackend(verbose=True, num_runs=10)
eng = MainEngine(
backend=backend,
engine_list=[mapper_factory()],
verbose=True,
)
qubit = eng.allocate_qubit()
X | qubit
Measure | qubit
with pytest.raises(MidCircuitMeasurementError):
X | qubit
# atexit sends another FlushGate, therefore we remove the backend:
dummy = DummyEngine()
dummy.is_last_engine = True
eng.active_qubits = []
eng.next_engine = dummy
