json_helper.rb

module JsonHelper
  def json
    (reparse_and_never_memoize_as_response_may_change = -> do
      JSON.parse(response.body, symbolize_names: true)
    end).call
  end

  def json_request_headers
    { 'Content-Type' => 'application/json', 'Accept' => 'application/json' }
  end
end

RSpec.configure do |config|
  config.include JsonHelper, type: :request
end