diff options
Diffstat (limited to 'Lib/test/test_threading.py')
| -rw-r--r-- | Lib/test/test_threading.py | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/Lib/test/test_threading.py b/Lib/test/test_threading.py index 7ce5af4..56f0deb 100644 --- a/Lib/test/test_threading.py +++ b/Lib/test/test_threading.py @@ -2,6 +2,8 @@ import test.support from test.support import verbose, strip_python_stderr, import_module +from test.script_helper import assert_python_ok + import random import re import sys @@ -415,6 +417,33 @@ class ThreadTests(BaseTestCase): t = threading.Thread(daemon=True) self.assertTrue(t.daemon) + @unittest.skipUnless(hasattr(os, 'fork'), 'test needs fork()') + def test_dummy_thread_after_fork(self): + # Issue #14308: a dummy thread in the active list doesn't mess up + # the after-fork mechanism. + code = """if 1: + import _thread, threading, os, time + + def background_thread(evt): + # Creates and registers the _DummyThread instance + threading.current_thread() + evt.set() + time.sleep(10) + + evt = threading.Event() + _thread.start_new_thread(background_thread, (evt,)) + evt.wait() + assert threading.active_count() == 2, threading.active_count() + if os.fork() == 0: + assert threading.active_count() == 1, threading.active_count() + os._exit(0) + else: + os.wait() + """ + _, out, err = assert_python_ok("-c", code) + self.assertEqual(out, b'') + self.assertEqual(err, b'') + class ThreadJoinOnShutdown(BaseTestCase): |