test_os.TimerfdTests fails on FreeBSD 14 and 15: missing select.epoll()

[vstinner]

os.timerfd_create() is documented to be available only on Linux, but it's always available on FreeBSD 14.

Problem: the test uses epoll() which is not available on FreeBSD. The test should be redesigned with selectors.DefaultSelector to become portable.

os.timerfd_create() was added recently to the main branch by PR gh-108382: see issue gh-108277.

cc @m-tmatma

Logs:

======================================================================
ERROR: test_timerfd_epoll (test.test_os.TimerfdTests.test_timerfd_epoll)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/home/buildbot/buildarea/3.x.opsec-fbsd14/build/Lib/test/test_os.py", line 4099, in test_timerfd_epoll
    ep = select.epoll()
         ^^^^^^^^^^^^
AttributeError: module 'select' has no attribute 'epoll'. Did you mean: 'poll'?

======================================================================
ERROR: test_timerfd_ns_epoll (test.test_os.TimerfdTests.test_timerfd_ns_epoll)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/home/buildbot/buildarea/3.x.opsec-fbsd14/build/Lib/test/test_os.py", line 4255, in test_timerfd_ns_epoll
    ep = select.epoll()
         ^^^^^^^^^^^^
AttributeError: module 'select' has no attribute 'epoll'. Did you mean: 'poll'?

FreeBSD 14 build: https://buildbot.python.org/all/#/builders/1232/builds/208

Linked PRs

• gh-110697: test_os TimerfdTests uses selectors #110789
• gh-110697: Use CLOCK_RES in test_os.TimerfdTests #111529

[m-tmatma]

@vstinner
You already fixed by #110789?

[vstinner]

@vstinner: You already fixed by #110789?

Yes. I was waiting for FreeBSD14 and FreeBSD15 builders: both are now green.

• https://buildbot.python.org/all/#/builders/1232
• https://buildbot.python.org/all/#/builders/1238