new_contents: # -*- coding: utf-8 -*-
  
  import pytest
  from nodefinder_gui.nodefinder_gui import clean_elements
  import mock
  
  
  def test_clean_elements():
       test_list = ['a ', '\tb\t', 'c; ']
  
       expected_result = ['a', 'b', 'c']
       actual_result = clean_elements(test_list)
  
       assert expected_result == actual_result
  
subject: Add test file