[Python-checkins] Fix test_posix if RWF_HIPRI is defined but not preadv2. (GH-13980)

[Miss Islington (bot)]

https://github.com/python/cpython/commit/b9ecc0fadaf04aa5f7c9cec9addb4c9c97380fee
commit: b9ecc0fadaf04aa5f7c9cec9addb4c9c97380fee
branch: 3.8
author: Miss Islington (bot) <31488909+miss-islington at users.noreply.github.com>
committer: GitHub <noreply at github.com>
date: 2019-06-11T10:58:57-07:00
summary:

Fix test_posix if RWF_HIPRI is defined but not preadv2. (GH-13980)


If preadv2 is not available, preadv will raise NotImplementedError.
(cherry picked from commit 44867bb9376e324493f0149ac8b3c33f23c9050d)

Co-authored-by: Benjamin Peterson <benjamin at python.org>

files:
M Lib/test/test_posix.py

diff --git a/Lib/test/test_posix.py b/Lib/test/test_posix.py
index 5c93d0d507d2..0f07a8f2e68d 100644
--- a/Lib/test/test_posix.py
+++ b/Lib/test/test_posix.py
@@ -310,6 +310,8 @@ 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 NotImplementedError:
+            self.skipTest("preadv2 not available")
         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