old_contents: #!/usr/bin/python
  
  try:
      import mock
  except ImportError:
      from unittest import mock
  
  from .context import powerball
  
  from powerball.game import Game
  from powerball.player import Player
  
new_contents: #!/usr/bin/python
  
  try:
      import mock
  except ImportError:
      from unittest import mock
  
  from .context import powerball
  
  from powerball.game import Game
  from powerball.player import Player
  
  
  class TestGameClass:
  
      def test_init_instance_type(self):
  
          game = Game()
          assert isinstance(game, Game) == True
  
subject: add test init for game class