diff options
Diffstat (limited to 'Lib/test/_test_multiprocessing.py')
| -rw-r--r-- | Lib/test/_test_multiprocessing.py | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/Lib/test/_test_multiprocessing.py b/Lib/test/_test_multiprocessing.py index 04657c08db..1b55cb31c3 100644 --- a/Lib/test/_test_multiprocessing.py +++ b/Lib/test/_test_multiprocessing.py @@ -5,6 +5,7 @@ import unittest import unittest.mock import queue as pyqueue +import textwrap import time import io import itertools @@ -5699,6 +5700,35 @@ class TestSyncManagerTypes(unittest.TestCase): self.run_worker(self._test_namespace, o) +class TestNamedResource(unittest.TestCase): + def test_global_named_resource_spawn(self): + # + # gh-90549: Check that global named resources in main module + # will not leak by a subprocess, in spawn context. + # + testfn = os_helper.TESTFN + self.addCleanup(os_helper.unlink, testfn) + with open(testfn, 'w', encoding='utf-8') as f: + f.write(textwrap.dedent('''\ + import multiprocessing as mp + + ctx = mp.get_context('spawn') + + global_resource = ctx.Semaphore() + + def submain(): pass + + if __name__ == '__main__': + p = ctx.Process(target=submain) + p.start() + p.join() + ''')) + rc, out, err = test.support.script_helper.assert_python_ok(testfn) + # on error, err = 'UserWarning: resource_tracker: There appear to + # be 1 leaked semaphore objects to clean up at shutdown' + self.assertEqual(err, b'') + + class MiscTestCase(unittest.TestCase): def test__all__(self): # Just make sure names in not_exported are excluded |