diff options
Diffstat (limited to 'Lib/test')
| -rw-r--r-- | Lib/test/test_concurrent_futures.py | 18 |
1 files changed, 17 insertions, 1 deletions
diff --git a/Lib/test/test_concurrent_futures.py b/Lib/test/test_concurrent_futures.py index 372da27..2afa938 100644 --- a/Lib/test/test_concurrent_futures.py +++ b/Lib/test/test_concurrent_futures.py @@ -183,7 +183,9 @@ class ProcessPoolShutdownTest(ProcessPoolMixin, ExecutorShutdownTest): for p in processes: p.join() + class WaitTests(unittest.TestCase): + def test_first_completed(self): future1 = self.executor.submit(mul, 21, 2) future2 = self.executor.submit(time.sleep, 1.5) @@ -284,7 +286,21 @@ class WaitTests(unittest.TestCase): class ThreadPoolWaitTests(ThreadPoolMixin, WaitTests): - pass + + def test_pending_calls_race(self): + # Issue #14406: multi-threaded race condition when waiting on all + # futures. + event = threading.Event() + def future_func(): + event.wait() + oldswitchinterval = sys.getswitchinterval() + sys.setswitchinterval(1e-6) + try: + fs = {self.executor.submit(future_func) for i in range(100)} + event.set() + futures.wait(fs, return_when=futures.ALL_COMPLETED) + finally: + sys.setswitchinterval(oldswitchinterval) class ProcessPoolWaitTests(ProcessPoolMixin, WaitTests): |