Issue #11508: Fixed uuid.getnode() and uuid.uuid1() on environment with

virtual interface.  Original patch by Kent Frazier.

Lib/test/test_uuid.py

@@ -1,5 +1,7 @@
 import unittest
+from test import support
 import builtins
+import io
 import os
 import uuid
 
@@ -356,6 +358,25 @@ class TestUUID(unittest.TestCase):
 
         self.assertEqual(node1, node2)
 
+    def test_find_mac(self):
+        data = '''\
+
+fake hwaddr
+cscotun0  Link encap:UNSPEC  HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00
+eth0      Link encap:Ethernet  HWaddr 12:34:56:78:90:ab
+'''
+        def mock_popen(cmd):
+            return io.StringIO(data)
+
+        with support.swap_attr(os, 'popen', mock_popen):
+            mac = uuid._find_mac(
+                command='ifconfig',
+                args='',
+                hw_identifiers=['hwaddr'],
+                get_index=lambda x: x + 1,
+            )
+            self.assertEqual(mac, 0x1234567890ab)
+
     @unittest.skipUnless(importable('ctypes'), 'requires ctypes')
     def test_uuid1(self):
         equal = self.assertEqual