RSpec 3 で default_params

default_params_helpers.rb

module DefaultParamsHelpers
  extend ActiveSupport::Concern

  included do
    let(:default_params) { {} }
    alias_method_chain :process, :default_params
  end

  private

  def process_with_default_params(action, http_method = 'GET', *args)
    parameters = args.shift
    parameters = default_params.reverse_merge(parameters || {})
    args.unshift(parameters)
    process_without_default_params(action, http_method, *args)
  end
end