bpo-36629: Add support.get_socket_conn_refused_errs() (GH-12834) (GH-12835)

Fix test_imap4_host_default_value() of test_imaplib: catch also
errno.ENETUNREACH error.
(cherry picked from commit 3c7931e514faf509a39c218c2c9f55efb434628f)

Co-authored-by: Victor Stinner <vstinner@redhat.com>

1 files changed, 1 insertions, 8 deletions

diff --git a/Lib/test/test_socket.py b/Lib/test/test_socket.py
index 3819652..43929b3 100644
--- a/Lib/test/test_socket.py
+++ b/Lib/test/test_socket.py
@@ -4720,14 +4720,7 @@ class NetworkConnectionNoServer(unittest.TestCase):
         # On Solaris, ENETUNREACH is returned in this circumstance instead
         # of ECONNREFUSED.  So, if that errno exists, add it to our list of
         # expected errnos.
-        expected_errnos = [ errno.ECONNREFUSED, ]
-        if hasattr(errno, 'ENETUNREACH'):
-            expected_errnos.append(errno.ENETUNREACH)
-        if hasattr(errno, 'EADDRNOTAVAIL'):
-            # bpo-31910: socket.create_connection() fails randomly
-            # with EADDRNOTAVAIL on Travis CI
-            expected_errnos.append(errno.EADDRNOTAVAIL)
-
+        expected_errnos = support.get_socket_conn_refused_errs()
         self.assertIn(cm.exception.errno, expected_errnos)
 
     def test_create_connection_timeout(self):