Using appropriate checks in tests

Lib/test/test_itertools.py

--- a/Lib/test/test_itertools.py	Fri Feb 07 17:53:13 2014 +0100
+++ b/Lib/test/test_itertools.py	Fri Feb 07 23:40:05 2014 +0200
@@ -326,7 +326,7 @@
                 if n == 0 or r <= 1:
                     self.assertEqual(result, regular_combs)            # cases that should be identical
                 else:
-                    self.assertTrue(set(result) >= set(regular_combs))     # rest should be supersets of regular combs
+                    self.assertGreaterEqual(set(result), set(regular_combs))  # rest should be supersets of regular combs
 
                 for c in result:
                     self.assertEqual(len(c), r)                         # r-length combinations
@@ -1191,7 +1191,7 @@
         # tee pass-through to copyable iterator
         a, b = tee('abc')
         c, d = tee(a)
-        self.assertTrue(a is c)
+        self.assertIs(a, c)
 
         # test tee_new
         t1, t2 = tee('abc')
@@ -1199,7 +1199,9 @@
         self.assertRaises(TypeError, tnew)
         self.assertRaises(TypeError, tnew, 10)
         t3 = tnew(t1)
-        self.assertTrue(list(t1) == list(t2) == list(t3) == list('abc'))
+        self.assertEqual(list(t1), list('abc'))
+        self.assertEqual(list(t2), list('abc'))
+        self.assertEqual(list(t3), list('abc'))
 
         # test that tee objects are weak referencable
         a, b = tee(range(10))