code: def test_get_tz_offset():
      """Test get_tz_offset"""
      d = datetime.datetime(2020, 1, 21, 12, 30, 0, tzinfo=TZ(90))
      assert get_tz_offset(d) == ("+", 1, 30)
  
      d = datetime.datetime(2020, 1, 21, 12, 30, 0, tzinfo=TZ(-90))
      assert get_tz_offset(d) == ("-", 1, 30)
  
      d = datetime.datetime(
          2020, 1, 21, 12, 30, 0, tzinfo=TZ(60 * 24 - 15)
      )
      assert get_tz_offset(d) == ("+", 23, 45)
  
      d = datetime.datetime(
          2020, 1, 21, 12, 30, 0, tzinfo=TZ(-60 * 24 + 15)
      )
      assert get_tz_offset(d) == ("-", 23, 45)
  
imports: import fiona
  from fiona._env import get_gdal_version_num, calc_gdal_version_num
  import pytest
  from fiona.errors import DriverSupportError
  from fiona.rfc3339 import parse_time, parse_datetime
  from .conftest import get_temp_filename
  from fiona.env import GDALVersion
  from fiona.model import Feature
  import datetime
  from fiona.drvsupport import supported_drivers, driver_mode_mingdal, _driver_converts_field_type_silently_to_str, _driver_supports_field, _driver_converts_to_str, _driver_supports_timezones, _driver_supports_milliseconds, _driver_supports_mode
  import pytz
  from pytz import timezone
label_desc: Use image node_id 12 for calling a global function with example usage: test_get_tz_offset() without return types