old_contents: from django.test import TestCase
  
  from eca_catalogue.text.tests.factories import SellingPointFactory
  
  
  class SellingPointTest(TestCase):
      def test_model(self):
          obj = SellingPointFactory()
          self.assertTrue(obj.pk)
  
  
new_contents: from django.test import TestCase
  
  from eca_catalogue.text.tests.factories import SellingPointFactory, WashingInstructionFactory
  
  
  class SellingPointTest(TestCase):
      def test_model(self):
          obj = SellingPointFactory()
          self.assertTrue(obj.pk)
  
  
  class WashingInstructionTest(TestCase):
      def test_model(self):
          obj = WashingInstructionFactory()
          self.assertTrue(obj.pk)
  
      def test_render_icon(self):
          obj = WashingInstructionFactory()
          self.assertEqual(obj.render_icon(), '<img src="icon.png" alt="text" title="text">')
          obj.icon = None
          self.assertIsNone(obj.render_icon(), None)
  
  
subject: add WashingInstructionTest