Add controller tests

Co-authored-by: viehlieb <pf@pragma-shift.net>
Co-authored-by: Tobias Kneuker <tk@pragma-shift.net>

seperate expects

refactor login user calls

add more articles to test sorting with

fix: fix test for rails upgrade

spec/controllers/application_controller_spec.rb

@@ -0,0 +1,12 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+describe ApplicationController, type: :controller do
+  describe 'current' do
+    it 'returns current ApplicationController' do
+      described_class.new.send(:store_controller)
+      expect(described_class.current).to be_instance_of described_class
+    end
+  end
+end