diff options
Diffstat (limited to 'Lib')
| -rw-r--r-- | Lib/test/test_deque.py | 19 |
1 files changed, 18 insertions, 1 deletions
diff --git a/Lib/test/test_deque.py b/Lib/test/test_deque.py index 02dadef..dcef246 100644 --- a/Lib/test/test_deque.py +++ b/Lib/test/test_deque.py @@ -50,7 +50,9 @@ class TestBasic(unittest.TestCase): def test_maxlen(self): self.assertRaises(ValueError, deque, 'abc', -1) self.assertRaises(ValueError, deque, 'abc', -2) - d = deque(range(10), maxlen=3) + it = iter(range(10)) + d = deque(it, maxlen=3) + self.assertEqual(list(it), []) self.assertEqual(repr(d), 'deque([7, 8, 9], maxlen=3)') self.assertEqual(list(d), range(7, 10)) self.assertEqual(d, deque(range(10), 3)) @@ -87,6 +89,21 @@ class TestBasic(unittest.TestCase): fo.close() test_support.unlink(test_support.TESTFN) + def test_maxlen_zero(self): + it = iter(range(100)) + deque(it, maxlen=0) + self.assertEqual(list(it), []) + + it = iter(range(100)) + d = deque(maxlen=0) + d.extend(it) + self.assertEqual(list(it), []) + + it = iter(range(100)) + d = deque(maxlen=0) + d.extendleft(it) + self.assertEqual(list(it), []) + def test_comparisons(self): d = deque('xabc'); d.popleft() for e in [d, deque('abc'), deque('ab'), deque(), list(d)]: |