text: from sklvq import activations
  from sklvq._utils import init_class
  from sklvq.activations import ALIASES
  from sklvq.activations import ActivationBaseClass
  
  
  def check_init_activation(activation_string):
      activation_class = init_class(activations, activation_string)
  
      assert isinstance(activation_class, type)
  
      activation_instance = activation_class()
  
      assert isinstance(activation_instance, ActivationBaseClass)
  
      return activation_class
  
  
  def test_aliases():
      for value in ALIASES.keys():
          check_init_activation(value)
  