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Diffstat (limited to 'Lib/test/test_subprocess.py')
| -rw-r--r-- | Lib/test/test_subprocess.py | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/Lib/test/test_subprocess.py b/Lib/test/test_subprocess.py index 7bb0492..b91791a 100644 --- a/Lib/test/test_subprocess.py +++ b/Lib/test/test_subprocess.py @@ -1702,6 +1702,28 @@ class RunFuncTestCase(BaseTestCase): msg="TimeoutExpired was delayed! Bad traceback:\n```\n" f"{stacks}```") + @unittest.skipIf(not sysconfig.get_config_var("HAVE_VFORK"), + "vfork() not enabled by configure.") + def test__use_vfork(self): + # Attempts code coverage within _posixsubprocess.c on the code that + # probes the subprocess module for the existence and value of this + # attribute in 3.10.5. + self.assertTrue(subprocess._USE_VFORK) # The default value regardless. + with mock.patch.object(subprocess, "_USE_VFORK", False): + self.assertEqual(self.run_python("pass").returncode, 0, + msg="False _USE_VFORK failed") + + class RaisingBool: + def __bool__(self): + raise RuntimeError("force PyObject_IsTrue to return -1") + + with mock.patch.object(subprocess, "_USE_VFORK", RaisingBool()): + self.assertEqual(self.run_python("pass").returncode, 0, + msg="odd bool()-error _USE_VFORK failed") + del subprocess._USE_VFORK + self.assertEqual(self.run_python("pass").returncode, 0, + msg="lack of a _USE_VFORK attribute failed") + def _get_test_grp_name(): for name_group in ('staff', 'nogroup', 'grp', 'nobody', 'nfsnobody'): |