let(:solr_document) { SolrDocument.new(work.to_solr) }
  let(:presenter) { described_class.new(solr_document, ability) }

  describe 'stats_path' do
    let(:user) { 'sarah' }
    let(:ability) { double "Ability" }
    let(:work) { build(:generic_work, id: '123abc') }
    it { expect(presenter.stats_path).to eq (Sufia::Engine.routes.url_helpers.stats_work_path) }
  end

   1) Sufia::WorkShowPresenter stats_path
     Failure/Error: it { expect(presenter.stats_path).to eq (Sufia::Engine.routes.url_helpers.stats_work_path) }

     ActionController::UrlGenerationError:
       No route matches {:action=>"work", :controller=>"stats"} missing required keys: [:id]
     # ./.bundle/ruby/2.2.0/gems/actionpack-4.2.5.1/lib/action_dispatch/journey/formatter.rb:46:in `generate'
     # ./.bundle/ruby/2.2.0/gems/actionpack-4.2.5.1/lib/action_dispatch/routing/route_set.rb:719:in `generate'
     # ./.bundle/ruby/2.2.0/gems/actionpack-4.2.5.1/lib/action_dispatch/routing/route_set.rb:750:in `generate'
     # ./.bundle/ruby/2.2.0/gems/actionpack-4.2.5.1/lib/action_dispatch/routing/route_set.rb:797:in `url_for'
     # ./.bundle/ruby/2.2.0/gems/actionpack-4.2.5.1/lib/action_dispatch/routing/route_set.rb:280:in `call'
     # ./.bundle/ruby/2.2.0/gems/actionpack-4.2.5.1/lib/action_dispatch/routing/route_set.rb:223:in `call'
     # ./.bundle/ruby/2.2.0/gems/actionpack-4.2.5.1/lib/action_dispatch/routing/route_set.rb:345:in `block (2 levels) in define_url_helper'
     # ./spec/presenters/sufia/work_show_presenter_spec.rb:11:in `block (3 levels) in <top (required)>'