def test_ibmcnotmapper_is_available(monkeypatch):
# Test that IBMCNOTMapper calls IBMBackend if gate is available.
def mock_send(*args, **kwargs):
return "Yes"
monkeypatch.setattr(_ibmcnotmapper.IBMBackend, "is_available", mock_send)
mapper = _ibmcnotmapper.IBMCNOTMapper()
assert mapper.is_available("TestCommand") == "Yes"
def test_ibmcnotmapper_nointermediate_measurements():
backend = DummyEngine()
eng = MainEngine(backend=backend,
engine_list=[_ibmcnotmapper.IBMCNOTMapper()])
qb0 = eng.allocate_qubit()
qb1 = eng.allocate_qubit()
CNOT | (qb0, qb1)
Measure | qb0
CNOT | (qb1, qb0)
with pytest.raises(Exception):
Measure | qb0
def test_ibmcnotmapper_invalid_circuit():
backend = DummyEngine(save_commands=True)
eng = MainEngine(backend=backend,
engine_list=[_ibmcnotmapper.IBMCNOTMapper()])
qb0 = eng.allocate_qubit()
qb1 = eng.allocate_qubit()
qb2 = eng.allocate_qubit()
qb3 = eng.allocate_qubit()
CNOT | (qb1, qb2)
CNOT | (qb0, qb1)
with pytest.raises(Exception):
CNOT | (qb3, qb2)
eng.flush()
def test_ibmcnotmapper_valid_circuit2():
backend = DummyEngine(save_commands=True)
eng = MainEngine(backend=backend,
engine_list=[_ibmcnotmapper.IBMCNOTMapper()])
qb0 = eng.allocate_qubit()
qb1 = eng.allocate_qubit()
qb2 = eng.allocate_qubit()
qb3 = eng.allocate_qubit()
qb4 = eng.allocate_qubit()
CNOT | (qb3, qb1)
CNOT | (qb3, qb2)
CNOT | (qb3, qb0)
CNOT | (qb3, qb4)
CNOT | (qb1, qb2)
CNOT | (qb0, qb4)
CNOT | (qb2, qb1)
eng.flush()
def test_ibmcnotmapper_optimizeifpossible():
backend = DummyEngine(save_commands=True)
eng = MainEngine(backend=backend,
engine_list=[_ibmcnotmapper.IBMCNOTMapper()])
qb0 = eng.allocate_qubit()
qb1 = eng.allocate_qubit()
qb2 = eng.allocate_qubit()
qb3 = eng.allocate_qubit()
CNOT | (qb1, qb2)
CNOT | (qb2, qb1)
CNOT | (qb1, qb2)
eng.flush()
hadamard_count = 0
for cmd in backend.received_commands:
if cmd.gate == H:
hadamard_count += 1
if cmd.gate == X:
assert cmd.qubits[0][0].id == qb2[0].id
assert hadamard_count == 4
backend.received_commands = []
CNOT | (qb2, qb1)
CNOT | (qb1, qb2)
CNOT | (qb2, qb1)
eng.flush()
hadamard_count = 0
for cmd in backend.received_commands:
if cmd.gate == H:
hadamard_count += 1
if cmd.gate == X:
assert cmd.qubits[0][0].id == qb1[0].id
assert hadamard_count == 4