Spec for the spree issue

spree_spec.rb

require 'spec_helper'

describe Spree::Config do
  before do
    ActionController::Base.perform_caching = true
    # config.cache_store = :dalli_store, { expires_in: 5.seconds }
  end

  it "Should fallback to database if cache keys expire" do
    Spree::Config.featured_sale_id = 10

    Rails.cache.clear
    sleep 30

    Spree::Config.featured_sale_id.should eq 10
  end
end