Issue #3804: Added test for Issue #2222.

Reviewed by Benjamin Peterson.

Lib/test/test_os.py

@@ -23,6 +23,13 @@ class FileTests(unittest.TestCase):
         os.close(f)
         self.assert_(os.access(test_support.TESTFN, os.W_OK))
 
+    def test_rename(self):
+        path = unicode(test_support.TESTFN)
+        old = sys.getrefcount(path)
+        self.assertRaises(TypeError, os.rename, path, 0)
+        new = sys.getrefcount(path)
+        self.assertEqual(old, new)
+
 
 class TemporaryFileTests(unittest.TestCase):
     def setUp(self):