def test_qureg_engine():
eng1 = MainEngine(backend=DummyEngine(), engine_list=[DummyEngine()])
eng2 = MainEngine(backend=DummyEngine(), engine_list=[DummyEngine()])
qureg = _qubit.Qureg([_qubit.Qubit(eng1, 0), _qubit.Qubit(eng1, 1)])
assert eng1 == qureg.engine
qureg.engine = eng2
assert qureg[0].engine == eng2 and qureg[1].engine == eng2
def test_qubit_not_copyable():
eng = MainEngine(backend=DummyEngine(), engine_list=[DummyEngine()])
qubit = _qubit.Qubit(eng, 10)
qubit_copy = copy(qubit)
assert id(qubit) == id(qubit_copy)
qubit_deepcopy = deepcopy(qubit)
assert id(qubit) == id(qubit_deepcopy)
def test_qureg(qubit_ids, expected): eng = MainEngine(backend = DummyEngine(), engine_list = [DummyEngine()]) qureg = _qubit.Qureg() for qubit_id in qubit_ids: qubit = _qubit.Qubit(eng, qubit_id) qureg.append(qubit) assert str(qureg) == expected
def test_qureg_measure_exception():
eng = MainEngine(backend=DummyEngine(), engine_list=[DummyEngine()])
qureg = _qubit.Qureg()
for qubit_id in [0, 1]:
qubit = _qubit.Qubit(eng, qubit_id)
qureg.append(qubit)
with pytest.raises(Exception):
qureg.__bool__()
with pytest.raises(Exception):
qureg.__int__()
def test_qubit_del(mock_main_engine):
qubit = _qubit.Qubit(mock_main_engine, 10)
assert qubit.id == 10
qubit.__del__()
assert qubit.id == -1
assert mock_main_engine.num_calls == 1
# We need hand coded mock here as mock.Mock cannot check qubit_id
# (it would save the call argument which is a qubit but id would be
# reset to -1 as qubits only have references)
assert mock_main_engine.qubit_id == 10
