from pathlib import Path
from src.calibration_history import CalibrationHistory
from src.models import CalibrationChangeRecord
def test_calibration_roundtrip_bom(tmp_path:Path)->None:
    h=CalibrationHistory(tmp_path/"h.csv");r=CalibrationChangeRecord("id1","now","学生","camera_position","横","正面","改善");h.append(r);assert h.path.read_bytes().startswith(b"\xef\xbb\xbf");assert h.load()[0].after_value=="正面"
def test_empty_history(tmp_path:Path)->None:assert CalibrationHistory(tmp_path/"none.csv").load()==[]