diff options
Diffstat (limited to 'Lib/test/test_itertools.py')
| -rw-r--r-- | Lib/test/test_itertools.py | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/Lib/test/test_itertools.py b/Lib/test/test_itertools.py index 380d121..744b344 100644 --- a/Lib/test/test_itertools.py +++ b/Lib/test/test_itertools.py @@ -283,6 +283,9 @@ class TestBasicOps(unittest.TestCase): args = map(iter, args) self.assertEqual(len(list(product(*args))), n) + # Test implementation detail: tuple re-use + self.assertEqual(len(set(map(id, product('abc', 'def')))), 1) + self.assertNotEqual(len(set(map(id, list(product('abc', 'def'))))), 1) def test_repeat(self): self.assertEqual(lzip(range(3),repeat('a')), |