Have deques support high volume loads.

1 files changed, 12 insertions, 0 deletions

diff --git a/Lib/test/test_deque.py b/Lib/test/test_deque.py
index 6221c91..51ce7b0 100644
--- a/Lib/test/test_deque.py
+++ b/Lib/test/test_deque.py
@@ -28,6 +28,18 @@ class TestBasic(unittest.TestCase):
         self.assertEqual(right, range(150, 400))
         self.assertEqual(list(d), range(50, 150))
 
+    def test_extend(self):
+        d = deque('a')
+        self.assertRaises(TypeError, d.extend, 1)
+        d.extend('bcd')
+        self.assertEqual(list(d), list('abcd'))
+
+    def test_extendleft(self):
+        d = deque('a')
+        self.assertRaises(TypeError, d.extendleft, 1)
+        d.extendleft('bcd')
+        self.assertEqual(list(d), list(reversed('abcd')))
+
     def test_len(self):
         d = deque('ab')
         self.assertEqual(len(d), 2)