Test rendered html

bookwyrm/tests/views/admin/test_ip_blocklist.py

@@ -1,5 +1,6 @@
 """ test for app action functionality """
 from unittest.mock import patch
+from tidylib import tidy_document
 from django.template.response import TemplateResponse
 from django.test import TestCase
 from django.test.client import RequestFactory
@@ -36,5 +37,8 @@ class IPBlocklistViews(TestCase):
         result = view(request)
 
         self.assertIsInstance(result, TemplateResponse)
-        result.render()
+        html = result.render()
+        _, errors = tidy_document(html.content)
+        if errors:
+            raise Exception(errors)
         self.assertEqual(result.status_code, 200)