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import functools
import os
import socket
import unittest
from tornado.platform.auto import set_close_exec
skipIfNonWindows = unittest.skipIf(os.name != 'nt', 'non-windows platform')
@skipIfNonWindows
class WindowsTest(unittest.TestCase):
def test_set_close_exec(self):
# set_close_exec works with sockets.
s = socket.socket()
self.addCleanup(s.close)
set_close_exec(s.fileno())
# But it doesn't work with pipes.
r, w = os.pipe()
self.addCleanup(functools.partial(os.close, r))
self.addCleanup(functools.partial(os.close, w))
with self.assertRaises(WindowsError) as cm:
set_close_exec(r)
ERROR_INVALID_HANDLE = 6
self.assertEqual(cm.exception.winerror, ERROR_INVALID_HANDLE)
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