Add tests for `SocialHelper::TumblrMethods`

spec/helpers/social_helper/tumblr_methods_spec.rb

@@ -0,0 +1,50 @@
+# frozen_string_literal: true
+
+require 'rails_helper'
+
+describe SocialHelper::TumblrMethods, :type => :helper do
+  let(:user) { FactoryBot.create(:user) }
+  let(:answer) { FactoryBot.create(:answer, user: user,
+                                    content: 'aaaa',
+                                    question_content: 'q') }
+
+  describe '#tumblr_title' do
+    context 'Asker is anonymous' do
+      subject { tumblr_title(answer) }
+
+      it 'should return a proper title' do
+        expect(subject).to eq('Anonymous asked: q')
+      end
+    end
+
+    context 'Asker is known' do
+      before do
+        @user = FactoryBot.create(:user)
+        answer.question.user = @user
+        answer.question.author_is_anonymous = false
+      end
+
+      subject { tumblr_title(answer) }
+
+      it 'should return a proper title' do
+        expect(subject).to eq("#{answer.question.user.profile.display_name} asked: q")
+      end
+    end
+  end
+
+  describe '#tumblr_body' do
+    subject { tumblr_body(answer) }
+
+    it 'should return a proper body' do
+      expect(subject).to eq("aaaa\n\n[Smile or comment on the answer here](https://justask.rrerr.net/#{answer.user.screen_name}/a/#{answer.id})")
+    end
+  end
+
+  describe '#tumblr_share_url' do
+    subject { tumblr_share_url(answer) }
+
+    it 'should return a proper share link' do
+        expect(subject).to eq("https://www.tumblr.com/widgets/share/tool?shareSource=legacy&posttype=text&title=#{CGI.escape(tumblr_title(answer))}&url=#{CGI.escape("https://justask.rrerr.net/#{answer.user.screen_name}/a/#{answer.id}")}&caption=&content=#{CGI.escape(tumblr_body(answer))}")
+    end
+  end
+end