diff options
Diffstat (limited to 'Lib/test/_test_multiprocessing.py')
| -rw-r--r-- | Lib/test/_test_multiprocessing.py | 24 |
1 files changed, 19 insertions, 5 deletions
diff --git a/Lib/test/_test_multiprocessing.py b/Lib/test/_test_multiprocessing.py index 4b3a064..a059a6b 100644 --- a/Lib/test/_test_multiprocessing.py +++ b/Lib/test/_test_multiprocessing.py @@ -5553,15 +5553,29 @@ class TestStartMethod(unittest.TestCase): multiprocessing.set_start_method(old_method, force=True) self.assertGreaterEqual(count, 1) - def test_get_all(self): + def test_get_all_start_methods(self): methods = multiprocessing.get_all_start_methods() + self.assertIn('spawn', methods) if sys.platform == 'win32': self.assertEqual(methods, ['spawn']) + elif sys.platform == 'darwin': + self.assertEqual(methods[0], 'spawn') # The default is first. + # Whether these work or not, they remain available on macOS. + self.assertIn('fork', methods) + self.assertIn('forkserver', methods) else: - self.assertTrue(methods == ['fork', 'spawn'] or - methods == ['spawn', 'fork'] or - methods == ['fork', 'spawn', 'forkserver'] or - methods == ['spawn', 'fork', 'forkserver']) + # POSIX + self.assertIn('fork', methods) + if other_methods := set(methods) - {'fork', 'spawn'}: + # If there are more than those two, forkserver must be one. + self.assertEqual({'forkserver'}, other_methods) + # The default is the first method in the list. + self.assertIn(methods[0], {'forkserver', 'spawn'}, + msg='3.14+ default must not be fork') + if methods[0] == 'spawn': + # Confirm that the current default selection logic prefers + # forkserver vs spawn when available. + self.assertNotIn('forkserver', methods) def test_preload_resources(self): if multiprocessing.get_start_method() != 'forkserver': |