Get rid of 'sets' module usage under Python 2.4+, so that no warnings

are issued by Python 2.6.  (backport from trunk)

--HG--
branch : setuptools-0.6
extra : convert_revision : svn%3A6015fed2-1504-0410-9fe1-9d1591cc4771/sandbox/branches/setuptools-0.6%4053871

1 files changed, 5 insertions, 3 deletions

diff --git a/setuptools/tests/test_resources.py b/setuptools/tests/test_resources.py
index a4b20de1..1b15a9eb 100644
--- a/setuptools/tests/test_resources.py
+++ b/setuptools/tests/test_resources.py
@@ -1,7 +1,10 @@
 from unittest import TestCase, makeSuite
 from pkg_resources import *
 import pkg_resources, sys
-from sets import ImmutableSet
+try:
+    frozenset
+except NameError:
+    from sets import ImmutableSet as frozenset
 
 class Metadata(EmptyProvider):
     """Mock object to return metadata as if from an on-disk distribution"""
@@ -18,7 +21,6 @@ class Metadata(EmptyProvider):
     def get_metadata_lines(self,name):
         return yield_lines(self.get_metadata(name))
 
-
 class DistroTests(TestCase):
 
     def testCollection(self):
@@ -337,7 +339,7 @@ class RequirementsTests(TestCase):
         self.assertEqual(hash(r1), hash(r2))
         self.assertEqual(
             hash(r1), hash(("twisted", ((">=",parse_version("1.2")),),
-                            ImmutableSet(["foo","bar"])))
+                            frozenset(["foo","bar"])))
         )
 
     def testVersionEquality(self):