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Diffstat (limited to 'Lib/test/test_subprocess.py')
| -rw-r--r-- | Lib/test/test_subprocess.py | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/Lib/test/test_subprocess.py b/Lib/test/test_subprocess.py index 74e7404..0804a13 100644 --- a/Lib/test/test_subprocess.py +++ b/Lib/test/test_subprocess.py @@ -1042,6 +1042,37 @@ class POSIXProcessTestCase(BaseTestCase): "Some fds were left open") self.assertIn(1, remaining_fds, "Subprocess failed") + def test_pass_fds(self): + fd_status = support.findfile("fd_status.py", subdir="subprocessdata") + + open_fds = set() + + for x in range(5): + fds = os.pipe() + self.addCleanup(os.close, fds[0]) + self.addCleanup(os.close, fds[1]) + open_fds.update(fds) + + for fd in open_fds: + p = subprocess.Popen([sys.executable, fd_status], + stdout=subprocess.PIPE, close_fds=True, + pass_fds=(fd, )) + output, ignored = p.communicate() + + remaining_fds = set(map(int, output.split(b','))) + to_be_closed = open_fds - {fd} + + self.assertIn(fd, remaining_fds, "fd to be passed not passed") + self.assertFalse(remaining_fds & to_be_closed, + "fd to be closed passed") + + # pass_fds overrides close_fds with a warning. + with self.assertWarns(RuntimeWarning) as context: + self.assertFalse(subprocess.call( + [sys.executable, "-c", "import sys; sys.exit(0)"], + close_fds=False, pass_fds=(fd, ))) + self.assertIn('overriding close_fds', str(context.warning)) + @unittest.skipUnless(mswindows, "Windows specific tests") class Win32ProcessTestCase(BaseTestCase): |