commit 64eaa20c68d54319c30bb75768cef0b114980893
author Raymond Hettinger <python@rcn.com> Thu Dec 10 05:36:11 2009 +0000
committer Raymond Hettinger <python@rcn.com> Thu Dec 10 05:36:11 2009 +0000
tree da0766dd238a8276e1da8b59f67ffa82751bded2
parent 53b44f75c1f7dc2ad5e1ccd0171d8b19bbb3005a

Fix variants of deque.extend:  d.extend(d)   d+=d  d.extendleft(d)

Lib/test/test_deque.py

diff --git a/Lib/test/test_deque.py b/Lib/test/test_deque.py
index 1a03188..67e41d6 100644
--- a/Lib/test/test_deque.py
+++ b/Lib/test/test_deque.py
@@ -136,12 +136,23 @@
         self.assertRaises(TypeError, d.extend, 1)
         d.extend('bcd')
         self.assertEqual(list(d), list('abcd'))
+        d.extend(d)
+        self.assertEqual(list(d), list('abcdabcd'))
+
+    def test_iadd(self):
+        d = deque('a')
+        d += 'bcd'
+        self.assertEqual(list(d), list('abcd'))
+        d += d
+        self.assertEqual(list(d), list('abcdabcd'))
 
     def test_extendleft(self):
         d = deque('a')
         self.assertRaises(TypeError, d.extendleft, 1)
         d.extendleft('bcd')
         self.assertEqual(list(d), list(reversed('abcd')))
+        d.extendleft(d)
+        self.assertEqual(list(d), list('abcddcba'))
         d = deque()
         d.extendleft(range(1000))
         self.assertEqual(list(d), list(reversed(range(1000))))