Add tests

.coveragerc

@@ -2,6 +2,9 @@
 branch = true
 source =
 	django_sonic_screwdriver
+omit =
+    manage.py
+    django_sonic_screwdriver/apps/**/manage.py
 
 [report]
 exclude_lines =

tests/test_model_comment.py

@@ -0,0 +1,13 @@
+from django.contrib.contenttypes.models import ContentType
+from django.test import TestCase
+
+from django_sonic_screwdriver.apps.admin_comments.models import Comment
+
+
+class CommentTest(TestCase):
+    def test_str_repr(self):
+        content_type = ContentType.objects.first()
+        comment = Comment.objects.create(
+            comment="Test", object_id="123", content_type=content_type
+        )
+        self.assertEqual(str(comment), f"{content_type} - {comment.object_id}")