def test_to_proto():
q = XmonQubit(5, 6)
# Create a new message.
proto = q.to_proto()
assert proto.row == 5
assert proto.col == 6
# Populate an existing message.
proto2 = operations_pb2.Qubit()
q.to_proto(proto2)
assert proto2.row == 5
assert proto2.col == 6
def test_from_proto():
q = XmonQubit(5, 6)
q2 = XmonQubit.from_proto(q.to_proto())
assert q2 == q