code: def test_cast_format_locale(self):
      date_type = Date(date_format="%d-%b-%Y", locale="de_DE.UTF-8")
  
      # March can be abbreviated to Mrz or Mär depending on the locale version,
      # so we use December in the first value to ensure the test passes everywhere
      values = (
          "01-Dez-1994",
          "17-Feb-2011",
          None,
          "05-Jan-1984",
          "n/a",
      )
      casted = tuple(date_type.cast(v) for v in values)
      self.assertSequenceEqual(
          casted,
          (
              datetime.date(1994, 12, 1),
              datetime.date(2011, 2, 17),
              None,
              datetime.date(1984, 1, 5),
              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 7 for calling the TestDate obj's underlying member method code with example usage: obj.test_cast_format_locale() without return types