Add tests for question create followers use case

spec/lib/use_case/question/create_followers_spec.rb

@@ -0,0 +1,29 @@
+# frozen_string_literal: true
+
+require "rails_helper"
+require "errors"
+require "use_case/question/create_followers"
+
+describe UseCase::Question::CreateFollowers do
+  subject do
+    UseCase::Question::CreateFollowers.call(
+      source_user_id: source_user.id,
+      content: content,
+      author_identifier: author_identifier
+    )
+  end
+
+  context "user is logged in" do
+    let(:source_user) { create(:user) }
+    let(:content) { "content" }
+    let(:author_identifier) { nil }
+
+    it "creates question" do
+      expect(subject[:question]).to be_persisted
+    end
+
+    it "enqueues a QuestionWorker job" do
+      expect(QuestionWorker).to have_enqueued_sidekiq_job(source_user.id, subject[:question].id)
+    end
+  end
+end