diff options
Diffstat (limited to 'Lib/test/test_concurrent_futures.py')
| -rw-r--r-- | Lib/test/test_concurrent_futures.py | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/Lib/test/test_concurrent_futures.py b/Lib/test/test_concurrent_futures.py index c74b2ca6ed..83184c3267 100644 --- a/Lib/test/test_concurrent_futures.py +++ b/Lib/test/test_concurrent_futures.py @@ -425,6 +425,13 @@ class ExecutorTest: self.assertTrue(collected, "Stale reference not collected within timeout.") + def test_max_workers_negative(self): + for number in (0, -1): + with self.assertRaisesRegex(ValueError, + "max_workers must be greater " + "than 0"): + self.executor_type(max_workers=number) + class ThreadPoolExecutorTest(ThreadPoolMixin, ExecutorTest, unittest.TestCase): def test_map_submits_without_iteration(self): |