text: from datetime import timedelta
  
  from django.utils import timezone
  
  from germanium.annotations import data_provider
  from germanium.test_cases.default import GermaniumTestCase
  from germanium.tools import assert_equal, assert_true, assert_false
  
  from auth_token.models import Token
  from auth_token.config import settings
  
  from .base import BaseTestCaseMixin
  
  
  __all__ = (
      'TokenTestCase',
  )
  
  
  class TokenTestCase(BaseTestCaseMixin, GermaniumTestCase):
  
      @data_provider('create_user')
      def test_should_return_proper_string_format_for_expiration(self, user):
          expired_token = Token.objects.create(user=user, ip='127.0.0.1')
          Token.objects.filter(pk=expired_token.pk).update(
              last_access=timezone.now() - timedelta(seconds=settings.MAX_TOKEN_AGE))
          expired_token = Token.objects.get(pk=expired_token.pk)
          assert_equal('00:00:00', Token.objects.get(pk=expired_token.pk).str_time_to_expiration)
  
          non_expired_token = Token.objects.create(user=user, ip='127.0.0.1')
          assert_equal('0:59:59', non_expired_token.str_time_to_expiration.split('.')[0])
  