From 63e1c840a7f96ed690f71902dad0749e951cb200 Mon Sep 17 00:00:00 2001
From: "Erlend E. Aasland" <erlend.aasland@innova.no>
Date: Mon, 13 Apr 2020 20:41:41 +0200
Subject: [PATCH] bpo-35569: Add unit tests

---
 Lib/test/test_socket.py | 31 +++++++++++++++++++++++++++++++
 1 file changed, 31 insertions(+)

diff --git a/Lib/test/test_socket.py b/Lib/test/test_socket.py
index 6e4e4fe4c3..a8a85fa61f 100755
--- a/Lib/test/test_socket.py
+++ b/Lib/test/test_socket.py
@@ -946,6 +946,37 @@ class GeneralModuleTests(unittest.TestCase):
         socket.IPPROTO_L2TP
         socket.IPPROTO_SCTP
 
+    @unittest.skipUnless(sys.platform == 'darwin', 'macOS specific test')
+    @unittest.skipUnless(support.IPV6_ENABLED, 'IPv6 required for this test.')
+    def test3542SOptions(self):
+        # Ref. issue #35569 and https://tools.ietf.org/html/rfc3542
+        opts = {
+            'IPV6_CHECKSUM',
+            'IPV6_DONTFRAG',
+            'IPV6_DSTOPTS',
+            'IPV6_HOPLIMIT',
+            'IPV6_HOPOPTS',
+            'IPV6_NEXTHOP',
+            'IPV6_PATHMTU',
+            'IPV6_PKTINFO',
+            'IPV6_RECVDSTOPTS',
+            'IPV6_RECVHOPLIMIT',
+            'IPV6_RECVHOPOPTS',
+            'IPV6_RECVPATHMTU',
+            'IPV6_RECVPKTINFO',
+            'IPV6_RECVRTHDR',
+            'IPV6_RECVTCLASS',
+            'IPV6_RTHDR',
+            'IPV6_RTHDRDSTOPTS',
+            'IPV6_RTHDR_TYPE_0',
+            'IPV6_TCLASS',
+            'IPV6_USE_MIN_MTU',
+        }
+        for opt in opts:
+            self.assertTrue(
+                hasattr(socket, opt), f"Missing RFC3542 socket option '{opt}'"
+            )
+
     def testHostnameRes(self):
         # Testing hostname resolution mechanisms
         hostname = socket.gethostname()
-- 
2.26.0.106.g9fadedd637