How do you test your Config/Initializer Scripts with Rspec in Rails?

Question

So I was searching online for a solution, but there seems to be scarce information about testing initializers created in Rails.

At the moment, I've written a pretty large API call-n-store in my config/initializers/retrieve_users.rb file. It makes an API request, parses the JSON, and then stores the data as users. Being pretty substantial, I've yet to figure out the cleanest way to test it. Since I need to retrieve the users before any functions are run, I don't believe I can move this script anywhere else (although other suggestions would be welcomed). I have a couple questions about this:

1. Do I have to wrap this in a function/class to test my code?
2. Where would I put my spec file?
3. How would I format it RSpec-style?

Thanks!

Answer 1

I just gave this a shot and have passing rspec tests, I am going to further refactor my code and in the end it will be shorter, but here is a snapshot of what I did, using this link as a guide:

The gist of it is this: make a class in your initializer file with the functions you want, then write tests on the functions in the class.

config/initializers/stripe_event.rb

StripeEvent.configure do |events|
  events.subscribe 'charge.dispute.created' do |event|
    StripeEventsResponder.charge_dispute_created(event)
  end
end

class StripeEventsResponder
  def self.charge_dispute_created(event)
    StripeMailer.admin_dispute_created(event.data.object).deliver
  end
end

spec/config/initializers/stripe_events_spec.rb

require 'spec_helper'

describe StripeEventsResponder do
  before { StripeMock.start }
  after { StripeMock.stop }
  after { ActionMailer::Base.deliveries.clear }

  describe '#charge_dispute_created' do
    it "sends one email" do
      event = StripeMock.mock_webhook_event('charge.dispute.created')
      StripeEventsResponder.charge_dispute_created(event)
      expect(ActionMailer::Base.deliveries.count).to eq(1)
    end

    it "sends the email to the admin" do
      event = StripeMock.mock_webhook_event('charge.dispute.created')
      StripeEventsResponder.charge_dispute_created(event)
      expect(ActionMailer::Base.deliveries.last.to).to eq(["[email protected]"])
    end
  end
end