Set controller caching in RSpec around block

caching_config.rb

RSpec.configure do |config|
  config.around(:each, :caching) do |example|
    caching = ActionController::Base.perform_caching
    ActionController::Base.perform_caching = example.metadata[:caching]
    example.run
    Rails.cache.clear
    ActionController::Base.perform_caching = caching
  end
end

example_spec.rb

describe "visit the homepage", :caching => true do
  // test cached stuff
end