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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[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])
mode[tty.IFLAG] |= termios.ICRNL
tty.cfmakecbreak(mode)
self.assertEqual(mode[tty.IFLAG] & termios.ICRNL, termios.ICRNL,
msg="ICRNL should not be cleared by cbreak")
mode[tty.IFLAG] &= ~termios.ICRNL
tty.cfmakecbreak(mode)
self.assertEqual(mode[tty.IFLAG] & termios.ICRNL, 0,
msg="ICRNL should not be set by cbreak")
def test_setraw(self):
mode0 = termios.tcgetattr(self.fd)
mode1 = tty.setraw(self.fd)
self.assertEqual(mode1, mode0)
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):
mode0 = termios.tcgetattr(self.fd)
mode1 = tty.setcbreak(self.fd)
self.assertEqual(mode1, mode0)
mode2 = termios.tcgetattr(self.fd)
self.check_cbreak(mode2)
ICRNL = termios.ICRNL
self.assertEqual(mode2[tty.IFLAG] & ICRNL, mode0[tty.IFLAG] & ICRNL,
msg="ICRNL should not be altered by cbreak")
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()