text: import unittest
  
  import penalty_test
  import reward_test
  import env_test
  import utils_test
  
  # initialize the test suite
  loader = unittest.TestLoader()
  suite = unittest.TestSuite()
  
  suite.addTests(loader.loadTestsFromModule(penalty_test))
  suite.addTests(loader.loadTestsFromModule(reward_test))
  suite.addTests(loader.loadTestsFromModule(env_test))
  suite.addTests(loader.loadTestsFromModule(utils_test))
  
  runner = unittest.TextTestRunner(verbosity=3)
  result = runner.run(suite)