From 6d9f8a7d82759884f22aa91b2f6813eaaf952a59 Mon Sep 17 00:00:00 2001
From: sobolevn <mail@sobolevn.me>
Date: Thu, 23 Dec 2021 13:43:10 +0300
Subject: [PATCH 1/2] bpo-46150: ensure `fakename` does not exist in
 `PosixPathTest.test_expanduser`

---
 Lib/test/test_pathlib.py                       | 18 +++++++++++++-----
 .../2021-12-23-13-42-15.bpo-46150.RhtADs.rst   |  2 ++
 2 files changed, 15 insertions(+), 5 deletions(-)
 create mode 100644 Misc/NEWS.d/next/Tests/2021-12-23-13-42-15.bpo-46150.RhtADs.rst

diff --git a/Lib/test/test_pathlib.py b/Lib/test/test_pathlib.py
index 5f6d9f47d13d75..555c7ee795bd12 100644
--- a/Lib/test/test_pathlib.py
+++ b/Lib/test/test_pathlib.py
@@ -2558,13 +2558,21 @@ def test_expanduser(self):
             othername = username
             otherhome = userhome
 
+        fakename = 'fakeuser'
+        # This user can theoretically exist on a test runner. Create unique name:
+        try:
+            while pwd.getpwnam(fakename):
+                fakename += '1'
+        except KeyError:
+            pass  # Non-existent name found
+
         p1 = P('~/Documents')
-        p2 = P('~' + username + '/Documents')
-        p3 = P('~' + othername + '/Documents')
-        p4 = P('../~' + username + '/Documents')
-        p5 = P('/~' + username + '/Documents')
+        p2 = P(f'~{username}/Documents')
+        p3 = P(f'~{othername}/Documents')
+        p4 = P(f'../~{username}/Documents')
+        p5 = P(f'/~{username}/Documents')
         p6 = P('')
-        p7 = P('~fakeuser/Documents')
+        p7 = P(f'~{fakename}/Documents')
 
         with os_helper.EnvironmentVarGuard() as env:
             env.pop('HOME', None)
diff --git a/Misc/NEWS.d/next/Tests/2021-12-23-13-42-15.bpo-46150.RhtADs.rst b/Misc/NEWS.d/next/Tests/2021-12-23-13-42-15.bpo-46150.RhtADs.rst
new file mode 100644
index 00000000000000..2369d0c61ece58
--- /dev/null
+++ b/Misc/NEWS.d/next/Tests/2021-12-23-13-42-15.bpo-46150.RhtADs.rst
@@ -0,0 +1,2 @@
+Now ``fakename`` in ``test_pathlib.PosixPathTest.test_expanduser`` is check
+to be non-existent.

From 9807ba0f0a075aad6673aeb5ecf15a2b26e841d7 Mon Sep 17 00:00:00 2001
From: Nikita Sobolev <mail@sobolevn.me>
Date: Thu, 23 Dec 2021 13:43:55 +0300
Subject: [PATCH 2/2] Update 2021-12-23-13-42-15.bpo-46150.RhtADs.rst

---
 Misc/NEWS.d/next/Tests/2021-12-23-13-42-15.bpo-46150.RhtADs.rst | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Misc/NEWS.d/next/Tests/2021-12-23-13-42-15.bpo-46150.RhtADs.rst b/Misc/NEWS.d/next/Tests/2021-12-23-13-42-15.bpo-46150.RhtADs.rst
index 2369d0c61ece58..8ef9cd9b4a5948 100644
--- a/Misc/NEWS.d/next/Tests/2021-12-23-13-42-15.bpo-46150.RhtADs.rst
+++ b/Misc/NEWS.d/next/Tests/2021-12-23-13-42-15.bpo-46150.RhtADs.rst
@@ -1,2 +1,2 @@
-Now ``fakename`` in ``test_pathlib.PosixPathTest.test_expanduser`` is check
+Now ``fakename`` in ``test_pathlib.PosixPathTest.test_expanduser`` is checked
 to be non-existent.