Add support for open-ended questions in admin section

Introduce a new "open" votation type for poll questions in the admin
interface. This type allows open answers provided by the user.

spec/factories/polls.rb

@@ -94,6 +94,12 @@ FactoryBot.define do
         create(:votation_type_multiple, questionable: question, max_votes: evaluator.max_votes)
       end
     end
+
+    factory :poll_question_open do
+      after(:create) do |question|
+        create(:votation_type_open, questionable: question)
+      end
+    end
   end
 
   factory :poll_question_option, class: "Poll::Question::Option" do

spec/factories/votation_type.rb

@@ -9,6 +9,10 @@ FactoryBot.define do
       max_votes { 3 }
     end
 
+    factory :votation_type_open do
+      vote_type { "open" }
+    end
+
     questionable factory: :poll_question
   end
 end

spec/models/poll/answer_spec.rb

@@ -30,6 +30,13 @@ describe Poll::Answer do
       expect(answer).not_to be_valid
     end
 
+    it "is not valid without an answer when question is open-ended" do
+      answer.question = create(:poll_question_open)
+      answer.answer = nil
+
+      expect(answer).not_to be_valid
+    end
+
     it "is not valid if there's already an answer to that question" do
       author = create(:user)
       question = create(:poll_question, :yes_no)

spec/models/votation_type_spec.rb

@@ -1,7 +1,7 @@
 require "rails_helper"
 
 describe VotationType do
-  let(:vote_types) { %i[votation_type_unique votation_type_multiple] }
+  let(:vote_types) { %i[votation_type_unique votation_type_multiple votation_type_open] }
   let(:votation_type) { build(vote_types.sample) }
 
   it "is valid" do
@@ -27,6 +27,10 @@ describe VotationType do
 
     expect(votation_type).to be_valid
 
+    votation_type.vote_type = "open"
+
+    expect(votation_type).to be_valid
+
     votation_type.vote_type = "multiple"
 
     expect(votation_type).not_to be_valid

spec/system/admin/poll/questions_spec.rb

@@ -81,6 +81,8 @@ describe "Admin poll questions", :admin do
         expect(page).to have_content "It's only possible to answer one time to the question."
         expect(page).not_to have_content "Allows to choose multiple answers."
         expect(page).not_to have_field "Maximum number of votes"
+        expect(page).not_to have_content "Open-ended question that allows users to provide " \
+                                         "a single answer in their own words."
 
         click_button "Save"
 
@@ -94,6 +96,8 @@ describe "Admin poll questions", :admin do
 
         expect(page).not_to have_content "It's only possible to answer one time to the question."
         expect(page).to have_content "Allows to choose multiple answers."
+        expect(page).not_to have_content "Open-ended question that allows users to provide " \
+                                         "a single answer in their own words."
 
         fill_in "Maximum number of votes", with: 6
         click_button "Save"
@@ -101,6 +105,21 @@ describe "Admin poll questions", :admin do
         expect(page).to have_content "Question with multiple answers"
         expect(page).to have_content "Multiple answers"
       end
+
+      scenario "Open-ended" do
+        fill_in "Question", with: "What do you want?"
+        select "Open-ended", from: "Votation type"
+
+        expect(page).not_to have_content "Allows to choose multiple answers."
+        expect(page).not_to have_field "Maximum number of votes"
+        expect(page).to have_content "Open-ended question that allows users to provide " \
+                                     "a single answer in their own words."
+
+        click_button "Save"
+
+        expect(page).to have_content "What do you want?"
+        expect(page).to have_content "Open-ended"
+      end
     end
   end
 
@@ -143,7 +162,7 @@ describe "Admin poll questions", :admin do
 
   scenario "Update" do
     poll = create(:poll, :future)
-    question = create(:poll_question, poll: poll)
+    question = create(:poll_question_open, poll: poll)
     old_title = question.title
     new_title = "Vegetables are great and everyone should have one"
 
@@ -154,6 +173,12 @@ describe "Admin poll questions", :admin do
     end
 
     expect(page).to have_link "Go back", href: admin_poll_path(poll)
+    expect(page).to have_select "Votation type", selected: "Open-ended"
+    expect(page).not_to have_content "Allows to choose multiple answers."
+    expect(page).not_to have_field "Maximum number of votes"
+    expect(page).to have_content "Open-ended question that allows users to provide " \
+                                 "a single answer in their own words."
+
     fill_in "Question", with: new_title
 
     click_button "Save"