bpo-32601: Let test_expanduser use the same user if no others found. (GH-5246)

This happens in the NixOS build sandbox, for example, where the only
other user is nobody with home directory /.
(cherry picked from commit 5c0d462689e1a69537eaeba6ab94e3ff3524fc31)

Co-authored-by: Anders Kaseorg <andersk@mit.edu>

diff --git a/Lib/test/test_pathlib.py b/Lib/test/test_pathlib.py
index 53215550b4354ec74e601d390a65ffc0c13a5871..d1a3fba2ded9083e7ebe617b41da10d9ce34abaf 100644 (file)
--- a/Lib/test/test_pathlib.py
+++ b/Lib/test/test_pathlib.py
@@ -2142,6 +2142,9 @@ class PosixPathTest(_BasePathTest, unittest.TestCase):
             otherhome = pwdent.pw_dir.rstrip('/')
             if othername != username and otherhome:
                 break
+        else:
+            othername = username
+            otherhome = userhome
 
         p1 = P('~/Documents')
         p2 = P('~' + username + '/Documents')