Are there any factory rails to help me test fickle models?

I like to use Sham gem . As long as you have a fickle model that matches some elements of the base implementation, you should be fine. For example, in my Rails application, I would do the following:

# sham/dog_sham.rb
class Dog::Sham
  def self.options
    { name: "Barney" }
  end
end

# app/models/dog.rb
class Dog < Struct.new(:name)
  def self.create options
    self.new(options[:name])
  end
end

Then in the console, I can create a factory Dog using the sham command:

Sham::Config.activate!
Dog.sham!
=> #<struct Dog name="Barney">