old_contents: from properties.models import Language
  from django.test import TestCase
  from django.core.exceptions import ObjectDoesNotExist
  
  class TestLanguage(TestCase):
      fixtures = ['properties_data.yaml']
      def setUp(self):
          pass
  
      def test_get_all_available_language(self):
          self.assertIsNotNone(Language.objects.all())
  
      def test_get_python(self):
          self.assertIsNotNone(Language.objects.get(lang="python"))
  
      def test_get_python_value_must_be_equal_to_python(self):
          language_object = Language.objects.get(lang="python")
          self.assertEqual("python", language_object.lang)
  
      def test_get_ruby(self):
          self.assertIsNotNone(Language.objects.get(lang="ruby"))
  
      def test_get_ruby_value_must_be_equal_to_ruby(self):
          language_object = Language.objects.get(lang="ruby")
          self.assertEqual("ruby", language_object.lang)
  
      def test_get_non_exsit_language_must_be_fail(self):
          self.assertRaises(
              ObjectDoesNotExist,
              Language.objects.get,
              lang="never_exist_lang"
          )
  
  
  
new_contents: from properties.models import AvailableLanguage
  from django.test import TestCase
  from django.core.exceptions import ObjectDoesNotExist
  
  class TestLanguage(TestCase):
      fixtures = ['properties_data.yaml']
      def setUp(self):
          pass
  
      def test_get_all_available_language(self):
          self.assertIsNotNone(Language.objects.all())
  
      def test_get_python(self):
          self.assertIsNotNone(Language.objects.get(lang="python"))
  
      def test_get_python_value_must_be_equal_to_python(self):
          language_object = Language.objects.get(lang="python")
          self.assertEqual("python", language_object.lang)
  
      def test_get_ruby(self):
          self.assertIsNotNone(Language.objects.get(lang="ruby"))
  
      def test_get_ruby_value_must_be_equal_to_ruby(self):
          language_object = Language.objects.get(lang="ruby")
          self.assertEqual("ruby", language_object.lang)
  
      def test_get_non_exsit_language_must_be_fail(self):
          self.assertRaises(
              ObjectDoesNotExist,
              Language.objects.get,
              lang="never_exist_lang"
          )
  
  
  
subject: test properties app name modified