def test_auto_replacer_adds_tags(test_gate_filter):
# Test that AutoReplacer puts back the tags
backend = DummyEngine(save_commands=True)
eng = MainEngine(backend=backend,
engine_list=[_replacer.AutoReplacer(), test_gate_filter])
assert len(decompositions[TestGate.__class__.__name__]) == 2
assert len(backend.received_commands) == 0
qb = eng.allocate_qubit()
cmd = Command(eng, TestGate, (qb, ))
cmd.tags = ["AddedTag"]
eng.send([cmd])
eng.flush()
assert len(backend.received_commands) == 3
assert backend.received_commands[1].gate == X
assert len(backend.received_commands[1].tags) == 1
assert backend.received_commands[1].tags[0] == "AddedTag"
def test_command_printer_measure_mapped_qubit():
eng = MainEngine(_printer.CommandPrinter(accept_input=False), [])
qb1 = WeakQubitRef(engine=eng, idx=1)
qb2 = WeakQubitRef(engine=eng, idx=2)
cmd0 = Command(engine=eng, gate=Allocate, qubits=([qb1], ))
cmd1 = Command(engine=eng,
gate=Measure,
qubits=([qb1], ),
controls=[],
tags=[LogicalQubitIDTag(2)])
with pytest.raises(NotYetMeasuredError):
int(qb1)
with pytest.raises(NotYetMeasuredError):
int(qb2)
eng.send([cmd0, cmd1])
eng.flush()
with pytest.raises(NotYetMeasuredError):
int(qb1)
assert int(qb2) == 0
def test_simulator_measure_mapped_qubit(sim):
eng = MainEngine(sim, [])
qb1 = WeakQubitRef(engine=eng, idx=1)
qb2 = WeakQubitRef(engine=eng, idx=2)
cmd0 = Command(engine=eng, gate=Allocate, qubits=([qb1], ))
cmd1 = Command(engine=eng, gate=X, qubits=([qb1], ))
cmd2 = Command(engine=eng,
gate=Measure,
qubits=([qb1], ),
controls=[],
tags=[LogicalQubitIDTag(2)])
with pytest.raises(NotYetMeasuredError):
int(qb1)
with pytest.raises(NotYetMeasuredError):
int(qb2)
eng.send([cmd0, cmd1, cmd2])
eng.flush()
with pytest.raises(NotYetMeasuredError):
int(qb1)
assert int(qb2) == 1