code: def test_uses_tty_directly(self):
      with mock.patch("os.open") as open, mock.patch(
          "io.FileIO"
      ) as fileio, mock.patch("io.TextIOWrapper") as textio:
          # By setting open's return value to None the implementation will
          # skip code we don't care about in this test.  We can mock this out
          # fully if an alternate implementation works differently.
          open.return_value = None
          getpass.unix_getpass()
          open.assert_called_once_with(
              "/dev/tty", os.O_RDWR | os.O_NOCTTY
          )
          fileio.assert_called_once_with(open.return_value, "w+")
          textio.assert_called_once_with(fileio.return_value)
  
imports: import getpass
  import os
  import unittest
  from io import BytesIO, StringIO, TextIOWrapper
  from unittest import mock
  from test import support
label_desc: Use image node_id 1 for calling the UnixGetpassTest obj's underlying member method code with example usage: obj.test_uses_tty_directly() without return types