Add tests for unique body classes

justfile

@@ -23,3 +23,6 @@ install:
 
 @collectstatic:
   ./manage.py collectstatic --noinput -v2
+
+test *ARGS:
+  ./manage.py test {{ ARGS }}

website/common/models.py

@@ -7,6 +7,7 @@ class BasePage(Page):
     class Meta:
         abstract = True
 
+    @classmethod
     @property
-    def body_class(self):
+    def body_class(cls):
-        return "page-" + self._meta.db_table.replace("_", "-")
+        return "page-" + cls._meta.db_table.replace("_", "-")

website/common/tests.py

@@ -0,0 +1,12 @@
+from django.test import SimpleTestCase
+from .utils import get_page_models
+from .models import BasePage
+
+class BasePageTestCase(SimpleTestCase):
+    def test_unique_body_classes(self):
+        body_classes = [page.body_class for page in get_page_models()]
+        self.assertEqual(len(body_classes), len(set(body_classes)))
+
+    def test_pages_inherit_base_page(self):
+        for page_model in get_page_models():
+            self.assertTrue(issubclass(page_model, BasePage), f"{page_model} does not inherit from {BasePage}.")

website/common/utils.py

@@ -0,0 +1,6 @@
+from wagtail.models import get_page_models as get_wagtail_page_models, Page
+
+def get_page_models():
+    page_models = get_wagtail_page_models().copy()
+    page_models.remove(Page)
+    return page_models