/Lib/test/test_openpty.py

 1# Test to see if openpty works. (But don't worry if it isn't available.)
 2
 3import os, unittest
 4from test.test_support import run_unittest, TestSkipped
 5
 6if not hasattr(os, "openpty"):
 7    raise TestSkipped, "No openpty() available."
 8
 9
10class OpenptyTest(unittest.TestCase):
11    def test(self):
12        master, slave = os.openpty()
13        if not os.isatty(slave):
14            self.fail("Slave-end of pty is not a terminal.")
15
16        os.write(slave, 'Ping!')
17        self.assertEqual(os.read(master, 1024), 'Ping!')
18
19def test_main():
20    run_unittest(OpenptyTest)
21
22if __name__ == '__main__':
23    test_main()