def test_compare_engine():
compare_engine0 = _testengine.CompareEngine()
compare_engine1 = _testengine.CompareEngine()
compare_engine2 = _testengine.CompareEngine()
compare_engine3 = _testengine.CompareEngine()
eng0 = MainEngine(backend=compare_engine0, engine_list=[DummyEngine()])
eng1 = MainEngine(backend=compare_engine1, engine_list=[DummyEngine()])
eng2 = MainEngine(backend=compare_engine2, engine_list=[DummyEngine()])
eng3 = MainEngine(backend=compare_engine3, engine_list=[DummyEngine()])
# reference circuit
qb00 = eng0.allocate_qubit()
qb01 = eng0.allocate_qubit()
qb02 = eng0.allocate_qubit()
H | qb00
CNOT | (qb00, qb01)
CNOT | (qb01, qb00)
H | qb00
Rx(0.5) | qb01
CNOT | (qb00, qb01)
Rx(0.6) | qb02
eng0.flush()
# identical circuit:
qb10 = eng1.allocate_qubit()
qb11 = eng1.allocate_qubit()
qb12 = eng1.allocate_qubit()
H | qb10
Rx(0.6) | qb12
CNOT | (qb10, qb11)
CNOT | (qb11, qb10)
Rx(0.5) | qb11
H | qb10
CNOT | (qb10, qb11)
eng1.flush()
# mistake in CNOT circuit:
qb20 = eng2.allocate_qubit()
qb21 = eng2.allocate_qubit()
qb22 = eng2.allocate_qubit()
H | qb20
Rx(0.6) | qb22
CNOT | (qb21, qb20)
CNOT | (qb20, qb21)
Rx(0.5) | qb21
H | qb20
CNOT | (qb20, qb21)
eng2.flush()
# test other branch to fail
qb30 = eng3.allocate_qubit() # noqa: F841
qb31 = eng3.allocate_qubit() # noqa: F841
qb32 = eng3.allocate_qubit() # noqa: F841
eng3.flush()
assert compare_engine0 == compare_engine1
assert compare_engine1 != compare_engine2
assert compare_engine1 != compare_engine3
assert not compare_engine0 == DummyEngine()
def test_compare_engine_receive():
# Test that CompareEngine would forward commands
backend = DummyEngine(save_commands=True)
compare_engine = _testengine.CompareEngine()
eng = MainEngine(backend=backend, engine_list=[compare_engine])
qubit = eng.allocate_qubit()
H | qubit
eng.flush()
assert len(backend.received_commands) == 3
def test_compare_engine_str():
compare_engine = _testengine.CompareEngine()
eng = MainEngine(backend=compare_engine, engine_list=[DummyEngine()])
qb0 = eng.allocate_qubit()
qb1 = eng.allocate_qubit()
H | qb0
CNOT | (qb0, qb1)
eng.flush()
expected = ("Qubit 0 : Allocate | Qureg[0], H | Qureg[0], " +
"CX | ( Qureg[0], Qureg[1] )\nQubit 1 : Allocate | Qureg[1]," +
" CX | ( Qureg[0], Qureg[1] )\n")
assert str(compare_engine) == expected
def test_compare_engine_is_available():
compare_engine = _testengine.CompareEngine()
assert compare_engine.is_available("Anything")
