bpo-29972: Skip tests known to fail on AIX (#979)

* bpo-29972: Fix test_eintr on AIX

On AIX, sigtimedwait(0.2) sleeps 199.8 ms, whereas the test expects
200 ms or longer.

* bpo-29972: Skip some inet_pton() tests on AIX

Skip some inet_pton() tests of test_socket on AIX.

inet_pton() on AIX is less strict than on Linux and doesn't reject
some invalid IP addresses. The unit tests test more the libc than
Python itself.

* bpo-29972: Skip tests known to fail on AIX

* test_locale.test_strcoll_with_diacritic()
* test_locale.test_strxfrm_with_diacritic()
* test_strptime.test_week_of_year_and_day_of_week_calculation()
* test_tools.test_POT_Creation_Date()

1 files changed, 3 insertions, 0 deletions

diff --git a/Lib/test/test_strptime.py b/Lib/test/test_strptime.py
index 2cf0926..9343180 100644
--- a/Lib/test/test_strptime.py
+++ b/Lib/test/test_strptime.py
@@ -5,6 +5,7 @@ import time
 import locale
 import re
 import os
+import sys
 from test import support
 from datetime import date as datetime_date
 
@@ -482,6 +483,8 @@ class CalculationTests(unittest.TestCase):
         _ymd_excluded = ()
         _formats_excluded = ()
 
+    @unittest.skipIf(sys.platform.startswith('aix'),
+                     'bpo-29972: broken test on AIX')
     def test_week_of_year_and_day_of_week_calculation(self):
         # Should be able to infer date if given year, week of year (%U or %W)
         # and day of the week