def exercise_user_plus_sys_time(): s = StringIO() utils.user_plus_sys_time().show_elapsed(out=s, prefix="e: ") s = s.getvalue() assert s.startswith("e: ") assert s.endswith(" s") utils.user_plus_sys_time().show_delta(out=s, prefix="d: ") s = s.getvalue() assert s.startswith("d: ") assert s.endswith(" s")