Testing simple STI with FactoryGirl

问题:

I have got a class, that is the base of some other classes that specializes the behavior:

class Task < ActiveRecord::Base
  attr_accessible :type, :name, :command
  validates_presence_of :type, :name, :command

  # some methods I would like to test

end

The class CounterTask inherits from Task

class CounterTask < Task 
end

This all works fine until I am trying to test the base class, since it must have a type.

FactoryGirl.define do
  factory :task do
    sequence(:name) { |n| "name_#{n}" }
    sequence(:command) { |n|  "command_#{n}" }
  end
end

How would you test the basic functionality of the superclass?

回答1:

You can declare the definitions of factories as follow:

FactoryGirl.define do
  factory :task, class: 'Task' do
    shop
    currency
    value 10
  end

  factory :counter_task, parent: :task, class: 'CounterTask' do
  end
end

And now you can test base class isolated from its own factory and the same for each inherited class.