From bdee329d8014ef53da7c27f3de1cd33c0fdbde14 Mon Sep 17 00:00:00 2001
From: Stefan Krah <stefan@bytereef.org>
Date: Sun, 11 Apr 2010 16:36:10 +0000
Subject: [PATCH] Merged revisions 79954 via svnmerge from
 svn+ssh://pythondev@svn.python.org/python/trunk

........
  r79954 | stefan.krah | 2010-04-11 17:15:54 +0200 (Sun, 11 Apr 2010) | 17 lines


  Fix for issues #3581, #1481 and #7650:

  1. The assumptions in check_node() were too restrictive:

       - Hardware addresses with universal_local_bit=1 are valid
         (locally administered).

       - Many of the tested functions (including uuid.getnode())
         may return valid RFC 4122 random node IDs. These are pretty
         much random 48-bit values with the multicast bit set to 1.

  2. _unixdll_getnode() calls _uuid_generate_time(), which may be None
     on some platforms. The resulting TypeError is now caught.
........
---
 Lib/test/test_uuid.py | 37 ++++++++++---------------------------
 1 file changed, 10 insertions(+), 27 deletions(-)

diff --git a/Lib/test/test_uuid.py b/Lib/test/test_uuid.py
index ab926ae1835..cc21baef5db 100644
--- a/Lib/test/test_uuid.py
+++ b/Lib/test/test_uuid.py
@@ -281,15 +281,9 @@ class TestUUID(TestCase):
         badtype(lambda: setattr(u, 'node', 0))
 
     def check_node(self, node, source):
-        individual_group_bit = (node >> 40L) & 1
-        universal_local_bit = (node >> 40L) & 2
-        message = "%012x doesn't look like a real MAC address" % node
-        self.assertEqual(individual_group_bit, 0, message)
-        self.assertEqual(universal_local_bit, 0, message)
-        self.assertNotEqual(node, 0, message)
-        self.assertNotEqual(node, 0xffffffffffffL, message)
-        self.assert_(0 <= node, message)
-        self.assert_(node < (1L << 48), message)
+        message = "%012x is not an RFC 4122 node ID" % node
+        self.assertTrue(0 < node, message)
+        self.assertTrue(node < (1L << 48), message)
 
         TestUUID.source2node[source] = node
         if TestUUID.last_node:
@@ -307,11 +301,6 @@ class TestUUID(TestCase):
 
     def test_ifconfig_getnode(self):
         import sys
-        print >>sys.__stdout__, \
-"""    WARNING: uuid._ifconfig_getnode is unreliable on many platforms.
-        It is disabled until the code and/or test can be fixed properly."""
-        return
-
         import os
         if os.name == 'posix':
             node = uuid._ifconfig_getnode()
@@ -331,19 +320,18 @@ class TestUUID(TestCase):
 
     def test_random_getnode(self):
         node = uuid._random_getnode()
-        self.assert_(0 <= node)
-        self.assert_(node < (1L <<48))
+        # Least significant bit of first octet must be set.
+        self.assertTrue(node & 0x010000000000)
+        self.assertTrue(node < (1L << 48))
 
     def test_unixdll_getnode(self):
         import sys
-        print >>sys.__stdout__, \
-"""    WARNING: uuid._unixdll_getnode is unreliable on many platforms.
-        It is disabled until the code and/or test can be fixed properly."""
-        return
-
         import os
         if importable('ctypes') and os.name == 'posix':
-            self.check_node(uuid._unixdll_getnode(), 'unixdll')
+            try: # Issues 1481, 3581: _uuid_generate_time() might be None.
+                self.check_node(uuid._unixdll_getnode(), 'unixdll')
+            except TypeError:
+                pass
 
     def test_windll_getnode(self):
         import os
@@ -352,11 +340,6 @@ class TestUUID(TestCase):
 
     def test_getnode(self):
         import sys
-        print >>sys.__stdout__, \
-"""    WARNING: uuid.getnode is unreliable on many platforms.
-        It is disabled until the code and/or test can be fixed properly."""
-        return
-
         node1 = uuid.getnode()
         self.check_node(node1, "getnode1")