Changed naming from Routes to Controllers; fixed some Sinatra modular layout stuff; added RSpec for testing and some basic tests

spec/controllers/index_controller_spec.rb

@@ -0,0 +1,23 @@
+# frozen_string_literal: true
+
+require_relative '../spec_helper'
+
+RSpec.describe(IndexController) do
+  # / route
+  describe 'Get /' do
+    it 'Dashboard returns 200.' do
+      get '/'
+      expect(last_response).to(be_ok)
+    end
+
+    it "Dashboard contains 'Game Data' on page (nav bar should be loaded)." do
+      get '/'
+      expect(last_response.body).to(include('Game Data'))
+    end
+
+    it "Dashboard contains 'Ruby version' on page (footer should be loaded)." do
+      get '/'
+      expect(last_response.body).to(include('Ruby version'))
+    end
+  end
+end