thoughtbot--factory_bot/lib/factory_girl/errors.rb

module FactoryGirl
  # Raised when a factory is defined that attempts to instantiate itself.
  class AssociationDefinitionError < RuntimeError; end

  # Raised when a callback is defined that has an invalid name
  class InvalidCallbackNameError < RuntimeError; end

  # Raised when a factory is defined with the same name as a previously-defined factory.
  class DuplicateDefinitionError < RuntimeError; end

  # Raised when attempting to register a sequence from a dynamic attribute block
  class SequenceAbuseError < RuntimeError; end

  # Raised when defining an invalid attribute:
  # * Defining an attribute which has a name ending in "="
  # * Defining an attribute with both a static and lazy value
  # * Defining an attribute twice in the same factory
  class AttributeDefinitionError < RuntimeError; end
end