Stop checking STATICFILES_DIRS with Django 4 or better (#1455)

Django 4.0 added its own check for this (staticfiles.W004). 

Also, removed a duplicated unit test for this problem.

Author: matthiask

tests/panels/test_staticfiles.py

@@ -1,13 +1,11 @@
 import os
+import unittest
 
+import django
 from django.conf import settings
 from django.contrib.staticfiles import finders
-from django.core.checks import Warning
-from django.test import SimpleTestCase
 from django.test.utils import override_settings
 
-from debug_toolbar.panels.staticfiles import StaticFilesPanel
-
 from ..base import BaseTestCase
 
 PATH_DOES_NOT_EXIST = os.path.join(settings.BASE_DIR, "tests", "invalid_static")
@@ -54,6 +52,7 @@ def test_insert_content(self):
         )
         self.assertValidHTML(content)
 
+    @unittest.skipIf(django.VERSION >= (4,), "Django>=4 handles missing dirs itself.")
     @override_settings(
         STATICFILES_DIRS=[PATH_DOES_NOT_EXIST] + settings.STATICFILES_DIRS,
         STATIC_ROOT=PATH_DOES_NOT_EXIST,
@@ -81,20 +80,3 @@ def test_finder_directory_does_not_exist(self):
         self.assertEqual(
             self.panel.get_staticfiles_dirs(), finders.FileSystemFinder().locations
         )
-
-
-@override_settings(DEBUG=True)
-class StaticFilesPanelChecksTestCase(SimpleTestCase):
-    @override_settings(STATICFILES_DIRS=[PATH_DOES_NOT_EXIST])
-    def test_run_checks(self):
-        messages = StaticFilesPanel.run_checks()
-        self.assertEqual(
-            messages,
-            [
-                Warning(
-                    "debug_toolbar requires the STATICFILES_DIRS directories to exist.",
-                    hint="Running manage.py collectstatic may help uncover the issue.",
-                    id="debug_toolbar.staticfiles.W001",
-                )
-            ],
-        )

tests/test_checks.py

@@ -1,5 +1,7 @@
 import os
+import unittest
 
+import django
 from django.conf import settings
 from django.core.checks import Warning, run_checks
 from django.test import SimpleTestCase, override_settings
@@ -89,6 +91,7 @@ def test_check_middleware_classes_error(self):
             messages,
         )
 
+    @unittest.skipIf(django.VERSION >= (4,), "Django>=4 handles missing dirs itself.")
     @override_settings(
         STATICFILES_DIRS=[PATH_DOES_NOT_EXIST],
     )