Added zip, map, filter to future_bultins (#2171)

1 files changed, 11 insertions, 0 deletions

diff --git a/Lib/test/test_py3kwarn.py b/Lib/test/test_py3kwarn.py
index cdb1038449..cc1e9f4d50 100644
--- a/Lib/test/test_py3kwarn.py
+++ b/Lib/test/test_py3kwarn.py
@@ -50,6 +50,17 @@ class TestPy3KWarnings(unittest.TestCase):
         with catch_warning() as w:
             self.assertWarning(cell0 < cell1, w, expected)
 
+    def test_filter(self):
+        from itertools import ifilter
+        from future_builtins import filter
+        expected = 'ifilter with None as a first argument is not supported '\
+                   'in 3.x.  Use a list comprehension instead.'
+
+        with catch_warning() as w:
+            self.assertWarning(ifilter(None, []), w, expected)
+        with catch_warning() as w:
+            self.assertWarning(filter(None, []), w, expected)
+
     def test_code_inequality_comparisons(self):
         expected = 'code inequality comparisons not supported in 3.x.'
         def f(x):