code: def test_short(self):
      self._dll.tf_h.restype = c_short
      self._dll.tf_h.argtypes = (c_short,)
      self.assertEqual(self._dll.tf_h(-32766), -10922)
      self.assertEqual(self.S(), -32766)
  
imports: import unittest
  from ctypes import *
  from ctypes.test import need_symbol
  import _ctypes_test
label_desc: Use image node_id 7 for calling the CFunctions obj's underlying member method code with example usage: obj.test_short() without return types