test_write_pty() of test_asyncio fails on "x86 Tiger 3.x" buildbot

[vstinner]

BPO	20472
Nosy	@gvanrossum, @pitrou, @vstinner, @ned-deily
Files	asyncio_pty_osx.patch asyncio_pty_osx-2.patch

^{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 = None
closed_at = <Date 2014-02-02.23:37:54.830>
created_at = <Date 2014-02-01.03:20:19.009>
labels = []
title = 'test_write_pty() of test_asyncio fails on "x86 Tiger 3.x" buildbot'
updated_at = <Date 2014-02-02.23:37:54.829>
user = 'https://github.com/vstinner'

bugs.python.org fields:

activity = <Date 2014-02-02.23:37:54.829>
actor = 'vstinner'
assignee = 'none'
closed = True
closed_date = <Date 2014-02-02.23:37:54.830>
closer = 'vstinner'
components = []
creation = <Date 2014-02-01.03:20:19.009>
creator = 'vstinner'
dependencies = []
files = ['33875', '33878']
hgrepos = []
issue_num = 20472
keywords = ['patch']
message_count = 7.0
messages = ['209870', '209873', '209880', '210036', '210052', '210053', '210054']
nosy_count = 5.0
nosy_names = ['gvanrossum', 'pitrou', 'vstinner', 'ned.deily', 'python-dev']
pr_nums = []
priority = 'normal'
resolution = 'fixed'
stage = None
status = 'closed'
superseder = None
type = None
url = 'https://bugs.python.org/issue20472'
versions = []

[vstinner]

http://buildbot.python.org/all/builders/x86%20Tiger%203.x/builds/7801/steps/test/logs/stdio

======================================================================
FAIL: test_write_pty (test.test_asyncio.test_events.PollEventLoopTests)
----------------------------------------------------------------------

Traceback (most recent call last):
  File "/Users/db3l/buildarea/3.x.bolen-tiger/build/Lib/test/test_asyncio/test_events.py", line 1105, in test_write_pty
    self.assertEqual(b'1', data)
AssertionError: b'1' != b''

[gvanrossum]

Well, there were other pty problems on OS X versions before Mavericks (10.9) -- let's just disable this test too using the same approach.

[ned-deily]

FYI, besides 10.4 (Tiger), the test also fails on OS X 10.5 but appears to pass on 10.6 and later releases.

[vstinner]

Here is a patch to skip the tests for SelectSelector on Mac OS X older than 10.6 (Snow Leopard).

@ned: Could you please try it? I don't have access to such old Mac OS X versions. (I now only have a iMac running 10.9).

[vstinner]

Oh, Ned told me that tests using the PollSelector are still failing. I forgot that poll() is also supported on OS X.

Please try this new patch.

[ned-deily]

With asyncio_pty_osx-2.patch, test_asyncio now passes on OS X 10.4.11 and 10.5.8.

[python-dev]

New changeset 21a4ebf5a170 by Victor Stinner in branch 'default':
Issue bpo-20472: test_asyncio: skip PTY tests on Mac OS X older than 10.6
http://hg.python.org/cpython/rev/21a4ebf5a170

New changeset 0a71d29b970a by Victor Stinner in branch 'default':
Issue bpo-20472: asyncio: Adjust the note about Mac OS X on PTY, specify that it
http://hg.python.org/cpython/rev/0a71d29b970a