From f970a98e464320c09dde8d45009eadfb4d038a57 Mon Sep 17 00:00:00 2001
From: zhengkangyang <1872483761@qq.com>
Date: Sat, 6 Jun 2026 16:17:24 +0800
Subject: Fixed #37142 -- Moved django_file_prefixes() to
 django.utils.warnings.

---
 tests/utils_tests/test_warnings.py | 34 ++++++++++++++++++++++++++++++++++
 1 file changed, 34 insertions(+)
 create mode 100644 tests/utils_tests/test_warnings.py

(limited to 'tests/utils_tests')

diff --git a/tests/utils_tests/test_warnings.py b/tests/utils_tests/test_warnings.py
new file mode 100644
index 0000000000..0c98e8ebe4
--- /dev/null
+++ b/tests/utils_tests/test_warnings.py
@@ -0,0 +1,34 @@
+import os
+from pathlib import Path
+
+import django
+from django.test import SimpleTestCase
+from django.utils.warnings import django_file_prefixes
+
+
+class DjangoFilePrefixesTests(SimpleTestCase):
+    def setUp(self):
+        django_file_prefixes.cache_clear()
+        self.addCleanup(django_file_prefixes.cache_clear)
+
+    def test_no_file(self):
+        orig_file = django.__file__
+        try:
+            # Depending on the cwd, Python might give a local checkout
+            # precedence over installed Django, producing None.
+            django.__file__ = None
+            self.assertEqual(django_file_prefixes(), ())
+            del django.__file__
+            self.assertEqual(django_file_prefixes(), ())
+        finally:
+            django.__file__ = orig_file
+
+    def test_with_file(self):
+        prefixes = django_file_prefixes()
+        self.assertIsInstance(prefixes, tuple)
+        self.assertEqual(len(prefixes), 1)
+        self.assertTrue(prefixes[0].endswith(f"{os.path.sep}django{os.path.sep}"))
+
+    def test_does_not_match_packages_prefixed_with_django(self):
+        other_file = Path(django.__file__).parent.parent / "djangoextra" / "__init__.py"
+        self.assertFalse(str(other_file).startswith(django_file_prefixes()))
-- 
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