test that object has a __dir__() implementation

diff --git a/Lib/test/test_builtin.py b/Lib/test/test_builtin.py
index b094a65f248750be311ad2be0718c0e2f3297dec..97619cf9ef4119bae4aa6169ac9df4000837a10e 100644 (file)
--- a/Lib/test/test_builtin.py
+++ b/Lib/test/test_builtin.py
@@ -385,6 +385,8 @@ class BuiltinTest(unittest.TestCase):
         except:
             self.assertEqual(len(dir(sys.exc_info()[2])), 4)
 
+        # test that object has a __dir__()
+        self.assertEqual(sorted([].__dir__()), dir([]))
 
     def test_divmod(self):
         self.assertEqual(divmod(12, 7), (1, 5))