text: from tests import (
      test_parser,
      test_reader,
      test_quote_parser,
      test_chart_parser,
      test_user_config_parser,
      test_quote_displayer,
      test_displayer,
      test_trends_displayer
  )
  import unittest
  from types import ModuleType
  
  def instantiate_test(module_name: ModuleType) -> None:
      """
      load tests from the passed module and run them.
      
      :param module_name -> ``str``: the name of a module that contains python unit tests.
      """
      MODULE = unittest.TestLoader().loadTestsFromModule(module_name)
      unittest.TextTestRunner().run(MODULE)
  
  instantiate_test(test_reader)
  instantiate_test(test_parser)
  instantiate_test(test_quote_parser)
  instantiate_test(test_chart_parser)
  instantiate_test(test_user_config_parser)
  instantiate_test(test_quote_displayer)
  instantiate_test(test_displayer)
  instantiate_test(test_trends_displayer)