test: added negative case for cascade delete permission

Author: UltraBot05

tests/test_project/tests/test_admin.py

@@ -152,6 +152,25 @@ def test_readonlyadmin_has_delete_permission(self):
             ).wsgi_request
             request.resolver_match = None
             self.assertTrue(modeladmin.has_delete_permission(request))
+        
+        with self.subTest("cascade delete without child permission returns False"):
+            request = self.client.get(
+                reverse("admin:test_project_radiusaccounting_changelist")
+            ).wsgi_request
+            
+            mock_resolver = MagicMock()
+            mock_resolver.url_name = "index"
+            request.resolver_match = mock_resolver
+            
+            # Mock a staff user who lacks the specific delete permission
+            request.user = MagicMock()
+            request.user.is_active = True
+            request.user.is_staff = True
+            request.user.is_superuser = False
+            request.user.has_perm.return_value = False  # Explicitly deny perm
+            
+            # It should fall back to super().has_delete_permission and return False
+            self.assertFalse(modeladmin.has_delete_permission(request))
 
     def test_context_processor(self):
         url = reverse("admin:index")