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gh-149879: Fix test_termios and test_ioctl on Cygwin by vstinner · Pull Request #150412 · python/cpython · GitHub

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gh-149879: Fix test_termios and test_ioctl on Cygwin #150412

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Merged
vstinner merged 1 commit into from
May 25, 2026
+31 −15
Conversation 0 Commits 1 Checks 53 Files changed 2
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gh-149879: Fix test_termios and test_ioctl on Cygwin #150412

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1 change: 1 addition & 0 deletions Lib/test/test_ioctl.py
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Original file line number Diff line number Diff line change
Expand Up @@ -139,6 +139,7 @@ def setUp(self):
self.addCleanup(os.close, self.master_fd)

@unittest.skipUnless(hasattr(termios, 'TCFLSH'), 'requires termios.TCFLSH')
@unittest.skipIf(sys.platform == 'cygwin', 'test failed on Cygwin')
def test_ioctl_clear_input_or_output(self):
wfd = self.slave_fd
rfd = self.master_fd
Expand Down
45 changes: 30 additions & 15 deletions Lib/test/test_termios.py
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Original file line number Diff line number Diff line change
@@ -1,3 +1,4 @@
import contextlib
import errno
import os
import sys
Expand All @@ -11,6 +12,19 @@
termios = import_module('termios')


# Skip the test on ENOTTY error
@contextlib.contextmanager
def skip_enotty_error(testcase, func, platforms):
try:
yield
except termios.error as exc:
if (exc.args[0] == errno.ENOTTY
and sys.platform.startswith(platforms)):
testcase.skipTest(f'termios.{func}() is not supported '
f'with pseudo-terminals (?) on {sys.platform}')
raise


@unittest.skipUnless(hasattr(os, 'openpty'), "need os.openpty()")
class TestFunctions(unittest.TestCase):

Expand Down Expand Up @@ -90,7 +104,8 @@ def test_tcsetattr_errors(self):
self.assertRaises(TypeError, termios.tcsetattr, self.fd, termios.TCSANOW, attrs2)
self.assertRaises(TypeError, termios.tcsetattr, self.fd, termios.TCSANOW, object())
self.assertRaises(TypeError, termios.tcsetattr, self.fd, termios.TCSANOW)
self.assertRaisesTermiosError(errno.EINVAL, termios.tcsetattr, self.fd, -1, attrs)
if sys.platform != 'cygwin':
self.assertRaisesTermiosError(errno.EINVAL, termios.tcsetattr, self.fd, -1, attrs)
self.assertRaises(OverflowError, termios.tcsetattr, self.fd, 2**1000, attrs)
self.assertRaises(TypeError, termios.tcsetattr, self.fd, object(), attrs)
self.assertRaisesTermiosError(errno.ENOTTY, termios.tcsetattr, self.bad_fd, termios.TCSANOW, attrs)
Expand All @@ -101,14 +116,10 @@ def test_tcsetattr_errors(self):

@support.skip_android_selinux('tcsendbreak')
def test_tcsendbreak(self):
try:
with skip_enotty_error(self, 'tcsendbreak',
('freebsd', 'netbsd', 'cygwin')):
termios.tcsendbreak(self.fd, 1)
except termios.error as exc:
if exc.args[0] == errno.ENOTTY and sys.platform.startswith(('freebsd', "netbsd")):
self.skipTest('termios.tcsendbreak() is not supported '
'with pseudo-terminals (?) on this platform')
raise
termios.tcsendbreak(self.stream, 1)
termios.tcsendbreak(self.stream, 1)

@support.skip_android_selinux('tcsendbreak')
def test_tcsendbreak_errors(self):
Expand All @@ -123,8 +134,9 @@ def test_tcsendbreak_errors(self):

@support.skip_android_selinux('tcdrain')
def test_tcdrain(self):
termios.tcdrain(self.fd)
termios.tcdrain(self.stream)
with skip_enotty_error(self, 'tcdrain', ('cygwin',)):
termios.tcdrain(self.fd)
termios.tcdrain(self.stream)

@support.skip_android_selinux('tcdrain')
def test_tcdrain_errors(self):
Expand All @@ -149,6 +161,7 @@ def test_tcflush_errors(self):
self.assertRaises(TypeError, termios.tcflush, object(), termios.TCIFLUSH)
self.assertRaises(TypeError, termios.tcflush, self.fd)

@unittest.skipIf(sys.platform == 'cygwin', 'test fails on Cygwin')
def test_tcflush_clear_input_or_output(self):
wfd = self.fd
rfd = self.master_fd
Expand Down Expand Up @@ -176,14 +189,16 @@ def test_tcflush_clear_input_or_output(self):

@support.skip_android_selinux('tcflow')
def test_tcflow(self):
termios.tcflow(self.fd, termios.TCOOFF)
termios.tcflow(self.fd, termios.TCOON)
termios.tcflow(self.fd, termios.TCIOFF)
termios.tcflow(self.fd, termios.TCION)
with skip_enotty_error(self, 'tcflow', ('cygwin',)):
termios.tcflow(self.fd, termios.TCOOFF)
termios.tcflow(self.fd, termios.TCOON)
termios.tcflow(self.fd, termios.TCIOFF)
termios.tcflow(self.fd, termios.TCION)

@support.skip_android_selinux('tcflow')
def test_tcflow_errors(self):
self.assertRaisesTermiosError(errno.EINVAL, termios.tcflow, self.fd, -1)
if sys.platform != 'cygwin':
self.assertRaisesTermiosError(errno.EINVAL, termios.tcflow, self.fd, -1)
self.assertRaises(OverflowError, termios.tcflow, self.fd, 2**1000)
self.assertRaises(TypeError, termios.tcflow, self.fd, object())
self.assertRaisesTermiosError(errno.ENOTTY, termios.tcflow, self.bad_fd, termios.TCOON)
Expand Down
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