Remove obsolete staticfiles check

The toolbar had a check for misconfigured static files directories.
However, Django 4.0 added its own check for this situation.  Since the
toolbar's minimum supported Django version is now 4.2, the toolbar's
check is made redundant by Django's check and can thus be removed.

debug_toolbar/panels/staticfiles.py

@@ -4,7 +4,6 @@
 
 from django.conf import settings
 from django.contrib.staticfiles import finders, storage
-from django.core.checks import Warning
 from django.utils.functional import LazyObject
 from django.utils.translation import gettext_lazy as _, ngettext
 
@@ -178,27 +177,3 @@ def get_staticfiles_apps(self):
                     if app not in apps:
                         apps.append(app)
         return apps
-
-    @classmethod
-    def run_checks(cls):
-        """
-        Check that the integration is configured correctly for the panel.
-
-        Specifically look for static files that haven't been collected yet.
-
-        Return a list of :class: `django.core.checks.CheckMessage` instances.
-        """
-        errors = []
-        for finder in finders.get_finders():
-            try:
-                for path, finder_storage in finder.list([]):
-                    finder_storage.path(path)
-            except OSError:
-                errors.append(
-                    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",
-                    )
-                )
-        return errors

docs/changes.rst

@@ -13,6 +13,10 @@ Pending
 * Stayed on top of pre-commit hook updates.
 * Added :doc:`architecture documentation <architecture>` to help
   on-board new contributors.
+* Removed the static file path validation check in
+  :class:`StaticFilesPanel <debug_toolbar.panels.staticfiles.StaticFilesPanel>`
+  since that check is made redundant by a similar check in Django 4.0 and
+  later.
 
 4.3.0 (2024-02-01)
 ------------------

tests/panels/test_staticfiles.py

@@ -1,15 +1,8 @@
-import os
-import unittest
-
-import django
 from django.conf import settings
 from django.contrib.staticfiles import finders
-from django.test.utils import override_settings
 
 from ..base import BaseTestCase
 
-PATH_DOES_NOT_EXIST = os.path.join(settings.BASE_DIR, "tests", "invalid_static")
-
 
 class StaticFilesPanelTestCase(BaseTestCase):
     panel_id = "StaticFilesPanel"
@@ -52,33 +45,3 @@ def test_insert_content(self):
             "django.contrib.staticfiles.finders.AppDirectoriesFinder", content
         )
         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,
-    )
-    def test_finder_directory_does_not_exist(self):
-        """Misconfigure the static files settings and verify the toolbar runs.
-
-        The test case is that the STATIC_ROOT is in STATICFILES_DIRS and that
-        the directory of STATIC_ROOT does not exist.
-        """
-        response = self.panel.process_request(self.request)
-        self.panel.generate_stats(self.request, response)
-        content = self.panel.content
-        self.assertIn(
-            "django.contrib.staticfiles.finders.AppDirectoriesFinder", content
-        )
-        self.assertNotIn(
-            "django.contrib.staticfiles.finders.FileSystemFinder (2 files)", content
-        )
-        self.assertEqual(self.panel.num_used, 0)
-        self.assertNotEqual(self.panel.num_found, 0)
-        expected_apps = ["django.contrib.admin", "debug_toolbar"]
-        if settings.USE_GIS:
-            expected_apps = ["django.contrib.gis"] + expected_apps
-        self.assertEqual(self.panel.get_staticfiles_apps(), expected_apps)
-        self.assertEqual(
-            self.panel.get_staticfiles_dirs(), finders.FileSystemFinder().locations
-        )

tests/test_checks.py

@@ -1,14 +1,8 @@
-import os
-import unittest
 from unittest.mock import patch
 
-import django
-from django.conf import settings
 from django.core.checks import Warning, run_checks
 from django.test import SimpleTestCase, override_settings
 
-PATH_DOES_NOT_EXIST = os.path.join(settings.BASE_DIR, "tests", "invalid_static")
-
 
 class ChecksTestCase(SimpleTestCase):
     @override_settings(
@@ -92,23 +86,6 @@ 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],
-    )
-    def test_panel_check_errors(self):
-        messages = 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",
-                )
-            ],
-        )
-
     @override_settings(DEBUG_TOOLBAR_PANELS=[])
     def test_panels_is_empty(self):
         errors = run_checks()