[Python-checkins] Skip test_preadv_flags if RWF_HIPRI is not supported by the system (GH-12762)

[Miss Islington (bot)]

https://github.com/python/cpython/commit/d28aaa7df8bcd46f4135d240d041b0b171b664cc
commit: d28aaa7df8bcd46f4135d240d041b0b171b664cc
branch: 3.7
author: Miss Islington (bot) <31488909+miss-islington at users.noreply.github.com>
committer: GitHub <noreply at github.com>
date: 2019-04-13T09:25:20-07:00
summary:

Skip test_preadv_flags if RWF_HIPRI is not supported by the system (GH-12762)

(cherry picked from commit 46544f69bff1c3c4173d461be35993ca0109f622)

Co-authored-by: Pablo Galindo <Pablogsal at gmail.com>

files:
M Lib/test/test_posix.py

diff --git a/Lib/test/test_posix.py b/Lib/test/test_posix.py
index 11180b7278c9..55077354589d 100644
--- a/Lib/test/test_posix.py
+++ b/Lib/test/test_posix.py
@@ -308,6 +308,14 @@ def test_preadv_flags(self):
             buf = [bytearray(i) for i in [5, 3, 2]]
             self.assertEqual(posix.preadv(fd, buf, 3, os.RWF_HIPRI), 10)
             self.assertEqual([b't1tt2', b't3t', b'5t'], list(buf))
+        except OSError as inst:
+            # Is possible that the macro RWF_HIPRI was defined at compilation time
+            # but the option is not supported by the kernel or the runtime libc shared
+            # library.
+            if inst.errno in {errno.EINVAL, errno.ENOTSUP}:
+                raise unittest.SkipTest("RWF_HIPRI is not supported by the current system")
+            else:
+                raise
         finally:
             os.close(fd)