Add failed test

Author: asvetlov

Lib/test/test_ipaddress.py

@@ -1323,14 +1323,15 @@ def testGetIp(self):
 
     def testIPv6IPv4MappedStringRepresentation(self):
         long_prefix = '0000:0000:0000:0000:0000:ffff:'
-        short_prefix = '::ffff:'
         ipv4 = '1.2.3.4'
-        ipv6_ipv4_mapped_str = '%s%s' % (short_prefix, ipv4)
-        ipv6_ipv4_mapped_address = ipaddress.IPv6Address(ipv6_ipv4_mapped_str)
-        ipv6_ipv4_mapped_interface = ipaddress.IPv6Interface(ipv6_ipv4_mapped_str)
-        self.assertEqual(str(ipv6_ipv4_mapped_address), ipv6_ipv4_mapped_str)
-        self.assertEqual(ipv6_ipv4_mapped_address.exploded, long_prefix + ipv4)
-        self.assertEqual(str(ipv6_ipv4_mapped_interface.ip), ipv6_ipv4_mapped_str)
+        for short_prefix in ('::ffff:', '::'):
+            ipv6_ipv4_mapped_str = '%s%s' % (short_prefix, ipv4)
+            with self.subTest(addr=ipv6_ipv4_mapped_str):
+                ipv6_ipv4_mapped_address = ipaddress.IPv6Address(ipv6_ipv4_mapped_str)
+                ipv6_ipv4_mapped_interface = ipaddress.IPv6Interface(ipv6_ipv4_mapped_str)
+                self.assertEqual(str(ipv6_ipv4_mapped_address), ipv6_ipv4_mapped_str)
+                self.assertEqual(ipv6_ipv4_mapped_address.exploded, long_prefix + ipv4)
+                self.assertEqual(str(ipv6_ipv4_mapped_interface.ip), ipv6_ipv4_mapped_str)
 
     def testGetScopeId(self):
         self.assertEqual(self.ipv6_address.scope_id,