Extract user tracking into concern (#2600)

spec/controllers/concerns/user_tracking_concern_spec.rb

@@ -0,0 +1,59 @@
+# frozen_string_literal: true
+
+require 'rails_helper'
+
+describe ApplicationController, type: :controller do
+  controller do
+    include UserTrackingConcern
+    def show
+      render plain: 'show'
+    end
+  end
+
+  before do
+    routes.draw { get 'show' => 'anonymous#show' }
+  end
+
+  describe 'when signed in' do
+    let(:user) { Fabricate(:user) }
+
+    it 'does not track when there is a recent sign in' do
+      user.update(current_sign_in_at: 60.minutes.ago)
+      prior = user.current_sign_in_at
+      sign_in user, scope: :user
+      get :show
+
+      expect(user.reload.current_sign_in_at).to be_within(1.0).of(prior)
+    end
+
+    it 'tracks when sign in is nil' do
+      user.update(current_sign_in_at: nil)
+      sign_in user, scope: :user
+      get :show
+
+      expect_updated_sign_in_at(user)
+    end
+
+    it 'tracks when sign in is older than one day' do
+      user.update(current_sign_in_at: 2.days.ago)
+      sign_in user, scope: :user
+      get :show
+
+      expect_updated_sign_in_at(user)
+    end
+
+    it 'regenerates feed when sign in is older than two weeks' do
+      allow(RegenerationWorker).to receive(:perform_async)
+      user.update(current_sign_in_at: 3.weeks.ago)
+      sign_in user, scope: :user
+      get :show
+
+      expect_updated_sign_in_at(user)
+      expect(RegenerationWorker).to have_received(:perform_async)
+    end
+
+    def expect_updated_sign_in_at(user)
+      expect(user.reload.current_sign_in_at).to be_within(1.0).of(Time.now.utc)
+    end
+  end
+end