Add a reverse() method to collections.deque().
diff --git a/Lib/test/test_deque.py b/Lib/test/test_deque.py
index 23641ba..c1f1667 100644
--- a/Lib/test/test_deque.py
+++ b/Lib/test/test_deque.py
@@ -204,6 +204,18 @@
self.assertTrue(val not in d)
self.assertEqual(len(d), 0)
+ def test_reverse(self):
+ n = 500 # O(n**2) test, don't make this too big
+ data = [random.random() for i in range(n)]
+ for i in range(n):
+ d = deque(data[:i])
+ r = d.reverse()
+ self.assertEqual(list(d), list(reversed(data[:i])))
+ self.assert_(r is None)
+ d.reverse()
+ self.assertEqual(list(d), data[:i])
+ self.assertRaises(TypeError, d.reverse, 1) # Arity is zero
+
def test_rotate(self):
s = tuple('abcde')
n = len(s)