code: def test_cast_parser_timezone(self):
      tzinfo = ZoneInfo("US/Pacific")
      datetime_type = DateTime(timezone=tzinfo)
  
      values = (
          "3/1/1994 12:30 PM",
          "2/17/2011 06:30",
          None,
          "January 5th, 1984 22:37",
          "n/a",
      )
      casted = tuple(datetime_type.cast(v) for v in values)
      self.assertSequenceEqual(
          casted,
          (
              datetime.datetime(
                  1994, 3, 1, 12, 30, 0, 0, tzinfo=tzinfo
              ),
              datetime.datetime(
                  2011, 2, 17, 6, 30, 0, 0, tzinfo=tzinfo
              ),
              None,
              datetime.datetime(
                  1984, 1, 5, 22, 37, 0, 0, tzinfo=tzinfo
              ),
              None,
          ),
      )
  
imports: import datetime
  import pickle
  import unittest
  from decimal import Decimal
  import parsedatetime
  from agate.data_types import Boolean, Date, DateTime, Number, Text, TimeDelta
  from agate.exceptions import CastError
label_desc: Use image node_id 6 for calling the TestDateTime obj's underlying member method code with example usage: obj.test_cast_parser_timezone() without return types