new_contents: # -*- coding: utf-8 -*-
  import datetime
  
  from django.core.exceptions import ValidationError
  from django.forms.fields import DateTimeField
  from django.test import TestCase, override_settings, tag
  from django.utils.formats import date_format, time_format
  
  from babybuddy.middleware import update_en_gb_date_formats
  
  
  class GbFormatsTestCase(TestCase):
      @override_settings(LANGUAGE_CODE='en-GB')
      def test_datetime_input_formats(self):
          update_en_gb_date_formats()
          field = DateTimeField()
          supported_custom_examples = [
              '20/01/2020',
              '20/01/2020 9:30 AM',
              '20/01/2020 9:30:03 AM',
              '01/10/2020 11:30 PM',
              '01/10/2020 11:30:03 AM',
          ]
  
          for example in supported_custom_examples:
              try:
                  result = field.to_python(example)
                  self.assertIsInstance(result, datetime.datetime)
              except ValidationError:
                  self.fail('Format of "{}" not recognized!'.format(example))
  
          with self.assertRaises(ValidationError):
              field.to_python('invalid date string!')
  
      @tag('isolate')
      @override_settings(LANGUAGE_CODE='en-GB', USE_24_HOUR_TIME_FORMAT=True)
      def test_use_24_hour_time_format(self):
          update_en_gb_date_formats()
          field = DateTimeField()
          supported_custom_examples = [
              '25/10/2006 2:30:59',
              '25/10/2006 2:30',
              '25/10/2006 14:30:59',
              '25/10/2006 14:30',
          ]
  
          for example in supported_custom_examples:
              try:
                  result = field.to_python(example)
                  self.assertIsInstance(result, datetime.datetime)
              except ValidationError:
                  self.fail('Format of "{}" not recognized!'.format(example))
  
          with self.assertRaises(ValidationError):
              field.to_python('invalid date string!')
  
          dt = datetime.datetime(year=2011, month=11, day=4, hour=23, minute=5,
                                 second=59)
          self.assertEqual(
              date_format(dt, 'DATETIME_FORMAT'), '4 November 2011 23:05:59')
  
          dt = datetime.datetime(year=2011, month=11, day=4, hour=2, minute=5,
                                 second=59)
          self.assertEqual(
              date_format(dt, 'SHORT_DATETIME_FORMAT'), '04/11//2011 2:05:59')
  
          t = datetime.time(hour=16, minute=2, second=25)
          self.assertEqual(time_format(t), '16:02:25')
  
      # def test_short_month_day_format(self):
      #     update_en_gb_date_formats()
      #     dt = datetime.datetime(year=2021, month=7, day=31, hour=5, minute=5,
      #                            second=5)
      #     self.assertEqual(date_format(dt, 'SHORT_MONTH_DAY_FORMAT'), '31 Jul')
  
subject: add en-gb format tests