[5.1.x] Fixed #35942 -- Fixed createsuperuser crash on Python 3.13+ when username is unavailable.

Thanks Mariusz Felisiak and Jacob Tyler Walls for reviews.

Backport of c635decb00ac957daf81c08541cdc9cf46f6d86d from main.

1 files changed, 7 insertions, 0 deletions

diff --git a/tests/auth_tests/test_management.py b/tests/auth_tests/test_management.py
index 5765c50034..0ef85a7299 100644
--- a/tests/auth_tests/test_management.py
+++ b/tests/auth_tests/test_management.py
@@ -126,6 +126,13 @@ class GetDefaultUsernameTestCase(TestCase):
     def test_actual_implementation(self):
         self.assertIsInstance(management.get_system_username(), str)
 
+    def test_getuser_raises_exception(self):
+        # TODO: Drop ImportError and KeyError when dropping support for PY312.
+        for exc in (ImportError, KeyError, OSError):
+            with self.subTest(exc=str(exc)):
+                with mock.patch("getpass.getuser", side_effect=exc):
+                    self.assertEqual(management.get_system_username(), "")
+
     def test_simple(self):
         management.get_system_username = lambda: "joe"
         self.assertEqual(management.get_default_username(), "joe")