Check for a common user error with defaultdict().

1 files changed, 4 insertions, 3 deletions

diff --git a/Lib/test/test_defaultdict.py b/Lib/test/test_defaultdict.py
index 134b5a8cb2..1834f9071a 100644
--- a/Lib/test/test_defaultdict.py
+++ b/Lib/test/test_defaultdict.py
@@ -47,6 +47,7 @@ class TestDefaultDict(unittest.TestCase):
             self.assertEqual(err.args, (15,))
         else:
             self.fail("d2[15] didn't raise KeyError")
+        self.assertRaises(TypeError, defaultdict, 1)
 
     def test_missing(self):
         d1 = defaultdict()
@@ -60,10 +61,10 @@ class TestDefaultDict(unittest.TestCase):
         self.assertEqual(repr(d1), "defaultdict(None, {})")
         d1[11] = 41
         self.assertEqual(repr(d1), "defaultdict(None, {11: 41})")
-        d2 = defaultdict(0)
-        self.assertEqual(d2.default_factory, 0)
+        d2 = defaultdict(int)
+        self.assertEqual(d2.default_factory, int)
         d2[12] = 42
-        self.assertEqual(repr(d2), "defaultdict(0, {12: 42})")
+        self.assertEqual(repr(d2), "defaultdict(<type 'int'>, {12: 42})")
         def foo(): return 43
         d3 = defaultdict(foo)
         self.assert_(d3.default_factory is foo)