Merged revisions 79044 via svnmerge from

svn+ssh://pythondev@svn.python.org/python/trunk

........
  r79044 | collin.winter | 2010-03-17 17:10:34 -0700 (Wed, 17 Mar 2010) | 1 line

  Make test_pwd more stable in the face of unusual LDAP/NIS/Kerberos deployments (the old test was flaky on Google buildslaves).
........

1 files changed, 8 insertions, 5 deletions

diff --git a/Lib/test/test_pwd.py b/Lib/test/test_pwd.py
index 95058c0..ae1c8fe 100644
--- a/Lib/test/test_pwd.py
+++ b/Lib/test/test_pwd.py
@@ -1,3 +1,4 @@
+import sys
 import unittest
 from test import support
 
@@ -83,11 +84,13 @@ class PwdTest(unittest.TestCase):
 
         self.assertRaises(KeyError, pwd.getpwnam, fakename)
 
-        # Choose a non-existent uid.
-        fakeuid = 4127
-        while fakeuid in byuids:
-            fakeuid = (fakeuid * 3) % 0x10000
-
+        # In some cases, byuids isn't a complete list of all users in the
+        # system, so if we try to pick a value not in byuids (via a perturbing
+        # loop, say), pwd.getpwuid() might still be able to find data for that
+        # uid. Using sys.maxint may provoke the same problems, but hopefully
+        # it will be a more repeatable failure.
+        fakeuid = sys.maxsize
+        self.assertNotIn(fakeuid, byuids)
         self.assertRaises(KeyError, pwd.getpwuid, fakeuid)
 
 def test_main():