gh-101384: add socket timeout to ThreadedVSOCKSocketStreamTest and skip it on WSL

[peterjpxie]

1/ Add socket server timeout to ThreadedVSOCKSocketStreamTest so that it does not hang on client connection failure, e.g. on WSL.

After adding the timeout, it was able to fail on this test and continue as follows.

./python -m test -v test.test_socket2
======================================================================
ERROR: testStream (test.test_socket2.ThreadedVSOCKSocketStreamTest.testStream)
----------------------------------------------------------------------
Traceback (most recent call last):
File "/home/peter/repo/cpython/Lib/test/test_socket2.py", line 376, in _setUp
self.__setUp()
File "/home/peter/repo/cpython/Lib/test/test_socket2.py", line 522, in setUp
self.conn, self.connaddr = self.serv.accept()
^^^^^^^^^^^^^^^^^^
File "/home/peter/repo/cpython/Lib/socket.py", line 295, in accept
fd, addr = self._accept()
^^^^^^^^^^^^^^
TimeoutError: timed out
======================================================================
ERROR: testStream (test.test_socket2.ThreadedVSOCKSocketStreamTest.testStream)
----------------------------------------------------------------------
Traceback (most recent call last):
File "/home/peter/repo/cpython/Lib/test/test_socket2.py", line 364, in raise_queued_exception
raise self.queue.get()
File "/home/peter/repo/cpython/Lib/test/test_socket2.py", line 388, in clientRun
self.clientSetUp()
File "/home/peter/repo/cpython/Lib/test/test_socket2.py", line 535, in clientSetUp
self.cli.connect((cid, VSOCKPORT))
OSError: [Errno 101] Network is unreachable
----------------------------------------------------------------------
Ran 724 tests in 41.724s
FAILED (errors=2, skipped=65)
test test.test_socket2 failed
test.test_socket2 failed (2 errors) in 41.8 sec
== Tests result: FAILURE ==
1 test failed:
test.test_socket2
Total duration: 41.9 sec
Tests result: FAILURE

2/ Furthermore, as it does not work on WSL (OSError: [Errno 101] Network is unreachable), skip it on WSL.

This works on VMware workstation for communication between VM guests and host.

3/ With all the changes, this is the summary of tests on different platforms:

• VMware station guest VM ubuntu: Passed
• Normal ubuntu server: Skipped
• WSL ubuntu: Skipped

• Issue: Unit test test.test_socket.ThreadedVSOCKSocketStreamTest.testStream hangs on WSL2 ubuntu #101384

[peterjpxie]

Hi @ncoghlan ,@tiran , @caavery

I was wondering if any of you can help review this PR. It is about vsock and I found you were involved in the initial vsock support PR #2489.

Thanks & Regards

Peter

[arhadthedev]

@giampaolo, @gpshead (as networking experts)

[serhiy-storchaka]

LGTM.

[serhiy-storchaka]

A NEWS entry is not required here.

[miss-islington-app]

Thanks @peterjpxie for the PR, and @serhiy-storchaka for merging it 🌮🎉.. I'm working now to backport this PR to: 3.11, 3.12.
🐍🍒⛏🤖

[bedevere-app]

GH-115585 is a backport of this pull request to the 3.12 branch.

[bedevere-app]

GH-115586 is a backport of this pull request to the 3.11 branch.