text: from django.contrib.admindocs import views
  from django.db.models import fields as builtin_fields
  from django.utils import unittest
  
  import fields
  
  
  class TestFieldType(unittest.TestCase):
      def setUp(self):
          pass
  
      def test_field_name(self):
          self.assertRaises(AttributeError,
              views.get_readable_field_data_type, "NotAField"
          )
  
      def test_builtin_fields(self):
          self.assertEqual(
              views.get_readable_field_data_type(builtin_fields.BooleanField()),
              u'Boolean (Either True or False)'
          )
  
      def test_custom_fields(self):
          self.assertEqual(
              views.get_readable_field_data_type(fields.CustomField()),
              u'A custom field type'
          )
          self.assertEqual(
              views.get_readable_field_data_type(fields.DescriptionLackingField()),
              u'Field of type: DescriptionLackingField'
          )
  