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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 1a02ef2e31..ef04cd360a 100644 --- a/Lib/test/test_threading.py +++ b/Lib/test/test_threading.py @@ -2,6 +2,8 @@ import test.test_support from test.test_support import verbose +from test.script_helper import assert_python_ok + import random import re import sys @@ -414,6 +416,33 @@ class ThreadTests(BaseTestCase): msg=('%d references still around' % sys.getrefcount(weak_raising_cyclic_object()))) + @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, '') + self.assertEqual(err, '') + class ThreadJoinOnShutdown(BaseTestCase): |