old_contents: from factory import DjangoModelFactory, CREATE_STRATEGY, LazyAttribute, post_generation, SubFactory, PostGeneration
  from yunity.utils.tests.fake import faker
  
  
  class Mock(DjangoModelFactory):
      class Meta:
          strategy = CREATE_STRATEGY
          model = None
          abstract = True
  
  
  class MockUser(Mock):
      class Meta:
          model = "yunity.User"
          strategy = CREATE_STRATEGY
  
      is_active = True
      is_staff = False
      display_name = LazyAttribute(lambda _: faker.name())
      first_name = LazyAttribute(lambda _: faker.name())
      last_name = LazyAttribute(lambda _: faker.name())
      email = LazyAttribute(lambda _: faker.email())
      password = PostGeneration(lambda obj, *args, **kwargs: obj.set_password(obj.display_name))
  
  
  class MockChat(Mock):
      class Meta:
          model = "yunity.Conversation"
          strategy = CREATE_STRATEGY
  
      administrated_by = SubFactory(MockUser)
  
      @post_generation
      def participants(self, created, participants, **kwargs):
          if not created:
              return
          if participants:
              for participant in participants:
                  self.participants.add(participant)
  
new_contents: from factory import DjangoModelFactory, CREATE_STRATEGY, LazyAttribute, post_generation, SubFactory, PostGeneration
  from yunity.utils.tests.fake import faker
  
  
  class Mock(DjangoModelFactory):
      class Meta:
          strategy = CREATE_STRATEGY
          model = None
          abstract = True
  
  
  class MockUser(Mock):
      class Meta:
          model = "yunity.User"
          strategy = CREATE_STRATEGY
  
      is_active = True
      is_staff = False
      display_name = LazyAttribute(lambda _: faker.name())
      first_name = LazyAttribute(lambda _: faker.name())
      last_name = LazyAttribute(lambda _: faker.name())
      email = LazyAttribute(lambda _: faker.email())
      password = PostGeneration(lambda obj, *args, **kwargs: obj.set_password(obj.display_name))
  
  
  class MockConversation(Mock):
      class Meta:
          model = "yunity.Conversation"
          strategy = CREATE_STRATEGY
  
      @post_generation
      def participants(self, created, participants, **kwargs):
          if not created:
              return
          if participants:
              for participant in participants:
                  self.participants.add(participant)
  
subject: Refactor MockConversation to new model