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      1 # Test to see if openpty works. (But don't worry if it isn't available.)
      2 
      3 import os, unittest
      4 from test.test_support import run_unittest
      5 
      6 if not hasattr(os, "openpty"):
      7     raise unittest.SkipTest, "No openpty() available."
      8 
      9 
     10 class 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 
     19 def test_main():
     20     run_unittest(OpenptyTest)
     21 
     22 if __name__ == '__main__':
     23     test_main()
     24