DCI and abstracting persistence

integration_spec.rb

shop         = Fabricate(:shop, business_hours: shop_hours)

shop_factory = Fabricate(:shop_factory)

def shop_factory.get id
  Fabricate(:shop, id: id)
end

data_store = Fabricate(:data_store) do
  shop_fetcher shop_factory
  carrier_fetcher Fabricate(:carrier_factory, all: [carrier])
end

options = {time_range: user_time_range, distance: 10, store_id: 1}

context = QuoteGeneratingContext.new options, data_store
quotes = context.call

quote_generation_context.rb

class QuoteGenerationContext
  attr_reader :data_store
  delegate :store_fetcher, :carrier_fetcher, to: :data_store

  def initialize options, data_store
    @data_store = data_store
    @store    = store_fetcher.get(options[:store_id])
    @carriers = carrier_fetcher.all

    @carriers.extend QuoteGenerator
  end
#...

end