text: from datetime import datetime
  from datetime import timezone
  
  import pytest  # type: ignore [import]
  
  from strava_gear.input.date import parse_datetime
  
  
  def test_parse_datetime():
      assert parse_datetime('') is None
  
      with pytest.raises(ValueError):
          parse_datetime('x')
  
      with pytest.raises(ValueError):
          parse_datetime('123')
  
      assert parse_datetime('2021-01-01') == datetime(2021, 1, 1).astimezone()
      assert parse_datetime('2021-01-01T08:00:00') == datetime(2021, 1, 1, 8).astimezone()
      assert parse_datetime('2021-01-01T08:00:00Z') == datetime(2021, 1, 1, 8, tzinfo=timezone.utc).astimezone()
      assert parse_datetime('2021-01-01T08:00:00+02:00') == datetime(2021, 1, 1, 6, tzinfo=timezone.utc).astimezone()
  