new_contents: import unittest
  
  from bob import Bob
  
  
  class TeenagerTest(unittest.TestCase):
      def setUp(self):
          self.teenager = Bob()
  
      def test_stating_something(self):
          self.assertEqual('Whatever.', self.teenager.hey('Tom-ay-to, tom-aaaah-to.'))
  
      @unittest.skip("Unskip once you are ready.")
      def test_shouting(self):
          self.assertEqual('Woah, chill out!', self.teenager.hey('WATCH OUT!'))
  
      @unittest.skip("Unskip once you are ready.")
      def test_asking_a_question(self):
          self.assertEqual('Sure.', self.teenager.hey('Does this cryogenic chamber make me look fat?'))
  
      @unittest.skip("Unskip once you are ready.")
      def test_talking_forcefully(self):
          self.assertEqual('Whatever.', self.teenager.hey("Let's go make out behind the gym!"))
  
      @unittest.skip("Unskip once you are ready.")
      def test_using_acronyms_in_regular_speech(self):
          self.assertEqual('Whatever.', self.teenager.hey("It's OK if you don't want to go to the DMV."))
  
      @unittest.skip("Unskip once you are ready.")
      def test_forceful_questions(self):
          self.assertEqual('Woah, chill out!', self.teenager.hey('WHAT THE HELL WERE YOU THINKING?'))
  
      @unittest.skip("Unskip once you are ready.")
      def test_shouting_numbers(self):
          self.assertEqual('Woah, chill out!', self.teenager.hey('1, 2, 3 GO!'))
  
      @unittest.skip("Unskip once you are ready.")
      def test_shouting_with_special_characters(self):
          self.assertEqual('Woah, chill out!', self.teenager.hey('ZOMG THE %^*@#$(*^ ZOMBIES ARE COMING!!11!!1!'))
  
      @unittest.skip("Unskip once you are ready.")
      def test_shouting_with_no_exclamation_mark(self):
          self.assertEqual('Woah, chill out!', self.teenager.hey('I HATE YOU'))
  
      @unittest.skip("Unskip once you are ready.")
      def test_statement_containing_question_mark(self):
          self.assertEqual('Whatever.', self.teenager.hey('ing with ? means a question.'))
  
      @unittest.skip("Unskip once you are ready.")
      def test_silence(self):
          self.assertEqual('Fine. Be that way!', self.teenager.hey(''))
  
      @unittest.skip("Unskip once you are ready.")
      def test_more_silence(self):
          self.assertEqual('Fine. Be that way!', self.teenager.hey(None))
  
  if __name__ == '__main__':
          unittest.main()
  
subject: Add bob unit tests