gistfile1.txt

    def test_mzk_id_is_saved_ang_get_properly(self):
        # Test connection

        content1 = Content(mzk_id="A")
        # before saving
        self.assertIs(content1.mzk_id, "A")
        content1.save()
        # after saving
        self.assertIs(content1.mzk_id, "A")

    def test_mzk_id_is_retrieved_properly(self):
        # Test connection

        content1 = Content(mzk_id="a")
        content1.save()

        c = Content.objects.get(pk="a")
        self.assertIs(c.mzk_id, "A")

    def test_mzk_id_has_to_be_a_string(self):
        # Test connection
        with self.assertRaises(TypeError):
            c = Content(mzk_id=12)
            c.save()

    def test_incrementation_of_content_mzk_id(self):
        # Test connection

        c1 = Content(name="a")
        c1.save()

        c2 = Content(name="ab")
        c2.save()

        mzk = c1.mzk_id

        mzk2 = c2.mzk_id
        
        # Where my error is:
        # TypeError: int() can't convert non-string with explicit base
        # Although I am expecting mzk2 to be a base32 str
        mzk2= int(mzk2, 36) 
        
        
        self.assertEqual(mzk + 1, mzk2)