new form model in apps.dashboard.forms to handle existing item-lists; new test model in .tests.test_forms to accommodate; also new method in .test_views, but skipped for now

src/apps/dashboard/tests/test_views.py

@@ -1,5 +1,6 @@
 from django.test import TestCase
 from django.utils import html
+from unittest import skip
 from ..forms import EMPTY_ITEM_ERROR
 from ..models import Item, List
 import lxml.html
@@ -117,3 +118,18 @@ class DashViewTest(TestCase):
     def test_for_invalid_input_shows_error_on_page(self):
         response = self.post_invalid_input()
         self.assertContains(response, html.escape(EMPTY_ITEM_ERROR))
+
+    @skip
+    def test_duplicate_item_validation_errors_end_up_on_lists_page(self):
+        list1 = List.objects.create()
+        Item.objects.create(list=list1, text="lorem ipsum")
+
+        response = self.client.post(
+            f"/apps/dashboard/{list1.id}/",
+            data={"text": "lorem ipsum"},
+        )
+
+        expected_error = html.escape("You've already logged this to your list")
+        self.assertContains(response, expected_error)
+        self.assertTemplateUsed(response, "apps/dashboard/list.html")
+        self.assertEqual(Item.objects.all().count(), 1)