Add tests for `SocialHelper::TwitterMethods`

spec/helpers/social_helper/twitter_methods_spec.rb

@@ -0,0 +1,43 @@
+# frozen_string_literal: true
+
+require 'rails_helper'
+
+describe SocialHelper::TwitterMethods, :type => :helper do
+  let(:user) { FactoryBot.create(:user) }
+  let(:answer) { FactoryBot.create(:answer, user: user,
+                                  content: 'a' * 255,
+                                  question_content: 'q' * 255) }
+
+  describe '#prepare_tweet' do
+    context 'when the question and answer need to be shortened' do
+      subject { prepare_tweet(answer) }
+
+      it 'should return a properly formatted tweet' do
+        expect(subject).to eq("#{'q' * 123}… — #{'a' * 124}… https://justask.rrerr.net/#{user.screen_name}/a/#{answer.id}")
+      end
+    end
+
+    context 'when the question and answer are short' do
+      before do
+        answer.question.content = 'Why are raccoons so good?'
+        answer.question.save!
+        answer.content = 'Because they are good cunes.'
+        answer.save!
+      end
+
+      subject { prepare_tweet(answer) }
+
+      it 'should return a properly formatted tweet' do
+        expect(subject).to eq("#{answer.question.content} — #{answer.content} https://justask.rrerr.net/#{user.screen_name}/a/#{answer.id}")
+      end
+    end
+  end
+
+  describe '#twitter_share_url' do
+    subject { twitter_share_url(answer) }
+
+    it 'should return a proper share link' do
+      expect(subject).to eq("https://twitter.com/intent/tweet?text=#{CGI.escape(prepare_tweet(answer))}")
+    end
+  end
+end