Add link to proposal if question was created from a proposal

spec/features/admin/poll/questions_spec.rb

@@ -14,8 +14,11 @@ feature "Admin poll questions" do
   scenario "Index" do
     poll1 = create(:poll)
     poll2 = create(:poll)
+    poll3 = create(:poll)
+    proposal = create(:proposal)
     question1 = create(:poll_question, poll: poll1)
     question2 = create(:poll_question, poll: poll2)
+    question3 = create(:poll_question, poll: poll3, proposal: proposal)
 
     visit admin_poll_path(poll1)
     expect(page).to have_content(poll1.name)
@@ -36,6 +39,17 @@ feature "Admin poll questions" do
       expect(page).to have_content("Edit")
       expect(page).to have_content("Delete")
     end
+
+    visit admin_poll_path(poll3)
+    expect(page).to have_content(poll3.name)
+
+    within("#poll_question_#{question3.id}") do
+      expect(page).to have_content(question3.title)
+      expect(page).to have_link("(See proposal)", href: proposal_path(question3.proposal))
+      expect(page).to have_content("Edit answers")
+      expect(page).to have_content("Edit")
+      expect(page).to have_content("Delete")
+    end
   end
 
   scenario "Show" do