test_pathlib assumes "fakeuser" does not exist as user

[Yhg1s]

BPO	46150
Nosy	@Yhg1s, @gpshead, @miss-islington, @sobolevn
PRs	bpo-46150: ensure fakename does not exist in PosixPathTest.test_expanduser #30240 bpo-46150: Allow test_pathlib to pass on systems where fakeuser exists. #30244 [3.10] bpo-46150: ensure fakeuser does not exist in PosixPathTest.test_expanduser (GH-30240) #30248 [3.9] bpo-46150: ensure fakeuser does not exist in PosixPathTest.test_expanduser (GH-30240) #30249 [3.9] bpo-46150: ensure fakeuser does not exist in PosixPathTest.test_expanduser (GH-30240) #30249 [3.9] bpo-46150: ensure fakeuser does not exist in PosixPathTest.test_expanduser (GH-30240) #30249

^{Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.}

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GitHub fields:

assignee = 'https://github.com/gpshead'
closed_at = <Date 2021-12-27.18:37:51.941>
created_at = <Date 2021-12-22.12:58:48.118>
labels = ['tests', '3.9', '3.10', '3.11']
title = 'test_pathlib assumes "fakeuser" does not exist as user'
updated_at = <Date 2021-12-27.18:37:51.940>
user = 'https://github.com/Yhg1s'

bugs.python.org fields:

activity = <Date 2021-12-27.18:37:51.940>
actor = 'gregory.p.smith'
assignee = 'gregory.p.smith'
closed = True
closed_date = <Date 2021-12-27.18:37:51.941>
closer = 'gregory.p.smith'
components = ['Tests']
creation = <Date 2021-12-22.12:58:48.118>
creator = 'twouters'
dependencies = []
files = []
hgrepos = []
issue_num = 46150
keywords = ['patch']
message_count = 4.0
messages = ['409030', '409128', '409130', '409131']
nosy_count = 4.0
nosy_names = ['twouters', 'gregory.p.smith', 'miss-islington', 'sobolevn']
pr_nums = ['30240', '30244', '30248', '30249', '30249', '30249']
priority = 'normal'
resolution = 'fixed'
stage = 'resolved'
status = 'closed'
superseder = None
type = None
url = 'https://bugs.python.org/issue46150'
versions = ['Python 3.9', 'Python 3.10', 'Python 3.11']

[Yhg1s]

test_pathlib contains, in PosixPathTest.test_expanduser, a check that expanduser on a nonexistent user will raise RuntimeError. Leaving aside the question why that's a RuntimeError (which is probably too late to fix anyway), the test performs this check by assuming 'fakeuser' is a nonexistent user. This test will fail when such a user does exist. (The test already uses the pwd module for other reasons, so it certainly could check that first.)

[gpshead]

New changeset b8de8b7 by Nikita Sobolev in branch 'main':
bpo-46150: ensure fakeuser does not exist in PosixPathTest.test_expanduser (GH-30240)
b8de8b7

[miss-islington]

New changeset 8005e22 by Miss Islington (bot) in branch '3.10':
bpo-46150: ensure fakeuser does not exist in PosixPathTest.test_expanduser (GH-30240)
8005e22

[miss-islington]

New changeset d718764 by Miss Islington (bot) in branch '3.9':
bpo-46150: ensure fakeuser does not exist in PosixPathTest.test_expanduser (GH-30240)
d718764