old_contents: # -*- coding: utf-8 -*-
  """
  Unit test
  """
  import unittest
  
  
  def run_tests():
      test_loader = unittest.TestLoader()
      test_suite = test_loader.discover('tests', pattern='test_*.py')
      return test_suite
  
new_contents: # -*- coding: utf-8 -*-
  """
  Unit test
  """
  import sys
  import unittest
  
  sys.path.append('../pythainlp')
  
  loader = unittest.TestLoader()
  testSuite = loader.discover('tests')
  testRunner = unittest.TextTestRunner(verbosity=2)
  testRunner.run(testSuite)
subject: change __init__.py to load all test files