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bpo-41818: test_openpty succeed on Gentoo, don't expect to fail on this platform #23514

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Merged
merged 2 commits into from
Nov 25, 2020
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bpo-41818: test_openpty succeed on Gentoo, don't expect to fail on this platform #23514

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test_openpty succeded on Gentoo, don't expect to fail it on this plat…
asvetlov Nov 25, 2020
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Add a comment for reason to don't apply expectedFailure() on Gentoo
asvetlov Nov 25, 2020
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14 changes: 14 additions & 0 deletions Lib/test/test_pty.py
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Original file line number Diff line number Diff line change
Expand Up @@ -5,6 +5,7 @@
import_module('termios')

import errno
import pathlib
import pty
import os
import sys
Expand Down Expand Up @@ -75,6 +76,19 @@ def _readline(fd):

def expectedFailureIfStdinIsTTY(fun):
# avoid isatty() for now
PLATFORM = platform.system()
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I don't understand the rationale for skipping the test only on Gentoo. Would you mind to write a comment to explaining the rationale? Why not skipping the test on Ubuntu? Is it a temporary workaround until someone can investigate the root issue? Please add a reference to bpo-41818 in the command.

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No, it is the reverse: Gentoo passes the test, all other tested Linux distributions fail.
That's why expectedFailure() is applied for each platform where stdin is a TTY except Gentoo.

I'll add a comment.

if PLATFORM == "Linux":
os_release = pathlib.Path("/etc/os-release")
if os_release.exists():
# Actually the file has complex multi-line structure,
# these is no need to parse it for Gentoo check
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See https://bugs.python.org/issue28468

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@vstinner @tiran I happy to use freedesktop_os_release() when it lands but want to merge this PR ASAP to fix the broken buildbot.

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@vstinner @tiran I happy to use freedesktop_os_release() when it lands but want to merge this PR ASAP to fix the broken buildbot.

Sure.

if 'gentoo' in os_release.read_text().lower():
# bpo-41818:
# Gentoo passes the test,
# all other tested Linux distributions fail.
# Should not apply @unittest.expectedFailure() on Gentoo
# to keep the buildbot fleet happy.
return fun
try:
tty.tcgetattr(pty.STDIN_FILENO)
return unittest.expectedFailure(fun)
Expand Down