diff options
Diffstat (limited to 'Lib/test/test_itertools.py')
| -rw-r--r-- | Lib/test/test_itertools.py | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/Lib/test/test_itertools.py b/Lib/test/test_itertools.py index 7233e7c..291aeb0 100644 --- a/Lib/test/test_itertools.py +++ b/Lib/test/test_itertools.py @@ -1,7 +1,7 @@ import unittest from test import test_support from itertools import * -from weakref import proxy +import weakref from decimal import Decimal from fractions import Fraction import sys @@ -792,6 +792,15 @@ class TestBasicOps(unittest.TestCase): self.assertEqual(list(islice(c, 1, 3, 50)), [1]) self.assertEqual(next(c), 3) + # Issue #21321: check source iterator is not referenced + # from islice() after the latter has been exhausted + it = (x for x in (1, 2)) + wr = weakref.ref(it) + it = islice(it, 1) + self.assertIsNotNone(wr()) + list(it) # exhaust the iterator + self.assertIsNone(wr()) + def test_takewhile(self): data = [1, 3, 5, 20, 2, 4, 6, 8] underten = lambda x: x<10 @@ -901,7 +910,7 @@ class TestBasicOps(unittest.TestCase): # test that tee objects are weak referencable a, b = tee(xrange(10)) - p = proxy(a) + p = weakref.proxy(a) self.assertEqual(getattr(p, '__class__'), type(b)) del a self.assertRaises(ReferenceError, getattr, p, '__class__') |