code: def testOK(self):
      global var
  
      var = 0
  
      @aup_args
      def test1a(x):
          return x
  
      test1a(self.file1)
  
      self.assertEqual(var, 1)
  
      @aup_args
      def test1b(x, a=1):
          return x + a
  
      test1b(self.file1)
  
      self.assertEqual(var, 2)
  
file_path: auptimizer/tests/test_wrapper.py
imports: import unittest
  from six import PY2
  from os import path
  from aup import aup_args
label_desc: Use image node_id 1 for calling the WrapperTestCase obj's underlying member method code with example usage: obj.testOK() and returns: x, unknown