commit d28aaa7df8bcd46f4135d240d041b0b171b664cc
author Miss Islington (bot) <31488909+miss-islington@users.noreply.github.com> Sat Apr 13 09:25:20 2019 -0700
committer GitHub <noreply@github.com> Sat Apr 13 09:25:20 2019 -0700
tree 296080cf0c73b468bdb0b7bec82615662b895eeb
parent be63df287a4a12ad86b4a2aec4358a1309f0488b

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@gmail.com>

Lib/test/test_posix.py

diff --git a/Lib/test/test_posix.py b/Lib/test/test_posix.py
index 11180b7..5507735 100644
--- a/Lib/test/test_posix.py
+++ b/Lib/test/test_posix.py
@@ -308,6 +308,14 @@
             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)