new_contents: import unittest
  from dojo import Dojo
  
  
  class TestCreateRoom (unittest.TestCase):
      def test_create_room_successfully(self):
          my_class_instance = Dojo()
          initial_room_count = len(my_class_instance.all_rooms)
          blue_office = my_class_instance.create_room("Blue", "office")
          self.assertTrue(blue_office)
          new_room_count = len(my_class_instance.all_rooms)
          self.assertEqual(new_room_count - initial_room_count, 1)
subject: Add create_room test