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Merged
merged 4 commits into from
Oct 10, 2023
Merged

gh-110388: Add tests for tty #110394

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bb70322
gh-110388: Add tests for tty
serhiy-storchaka Oct 5, 2023
80b3f21
Skip tests if /dev/tty is not available.
serhiy-storchaka Oct 5, 2023
99858f0
Use pseudo-terminal.
serhiy-storchaka Oct 6, 2023
b18ef05
Merge branch 'main' into test_tty
serhiy-storchaka Oct 6, 2023
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80 changes: 80 additions & 0 deletions Lib/test/test_tty.py
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import os
import unittest
from test.support.import_helper import import_module

termios = import_module('termios')
tty = import_module('tty')


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

def setUp(self):
master_fd, self.fd = os.openpty()
self.addCleanup(os.close, master_fd)
self.stream = self.enterContext(open(self.fd, 'wb', buffering=0))
self.fd = self.stream.fileno()
self.mode = termios.tcgetattr(self.fd)
self.addCleanup(termios.tcsetattr, self.fd, termios.TCSANOW, self.mode)
self.addCleanup(termios.tcsetattr, self.fd, termios.TCSAFLUSH, self.mode)

def check_cbreak(self, mode):
self.assertEqual(mode[0] & termios.ICRNL, 0)
self.assertEqual(mode[3] & termios.ECHO, 0)
self.assertEqual(mode[3] & termios.ICANON, 0)
self.assertEqual(mode[6][termios.VMIN], 1)
self.assertEqual(mode[6][termios.VTIME], 0)

def check_raw(self, mode):
self.check_cbreak(mode)
self.assertEqual(mode[0] & termios.ISTRIP, 0)
self.assertEqual(mode[0] & termios.ICRNL, 0)
self.assertEqual(mode[1] & termios.OPOST, 0)
self.assertEqual(mode[2] & termios.PARENB, termios.CS8 & termios.PARENB)
self.assertEqual(mode[2] & termios.CSIZE, termios.CS8 & termios.CSIZE)
self.assertEqual(mode[2] & termios.CS8, termios.CS8)
self.assertEqual(mode[3] & termios.ECHO, 0)
self.assertEqual(mode[3] & termios.ICANON, 0)
self.assertEqual(mode[3] & termios.ISIG, 0)
self.assertEqual(mode[6][termios.VMIN], 1)
self.assertEqual(mode[6][termios.VTIME], 0)

def test_cfmakeraw(self):
mode = termios.tcgetattr(self.fd)
self.assertEqual(mode, self.mode)
tty.cfmakeraw(mode)
self.check_raw(mode)
self.assertEqual(mode[4], self.mode[4])
self.assertEqual(mode[5], self.mode[5])

def test_cfmakecbreak(self):
mode = termios.tcgetattr(self.fd)
self.assertEqual(mode, self.mode)
tty.cfmakecbreak(mode)
self.check_cbreak(mode)
self.assertEqual(mode[1], self.mode[1])
self.assertEqual(mode[2], self.mode[2])
self.assertEqual(mode[4], self.mode[4])
self.assertEqual(mode[5], self.mode[5])

def test_setraw(self):
mode = tty.setraw(self.fd)
mode2 = termios.tcgetattr(self.fd)
self.check_raw(mode2)
mode3 = tty.setraw(self.fd, termios.TCSANOW)
self.assertEqual(mode3, mode2)
tty.setraw(self.stream)
tty.setraw(fd=self.fd, when=termios.TCSANOW)

def test_setcbreak(self):
mode = tty.setcbreak(self.fd)
mode2 = termios.tcgetattr(self.fd)
self.check_cbreak(mode2)
mode3 = tty.setcbreak(self.fd, termios.TCSANOW)
self.assertEqual(mode3, mode2)
tty.setcbreak(self.stream)
tty.setcbreak(fd=self.fd, when=termios.TCSANOW)


if __name__ == '__main__':
unittest.main()
1 change: 1 addition & 0 deletions Misc/NEWS.d/next/Tests/2023-10-05-14-22-48.gh-issue-110388.1-HQJO.rst
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Add tests for :mod:`tty`.