Add PagesControllerTest with authentication (#288)

* Add PagesControllerTest with authentication

* Rubocop fixes

* Move sign_in to setup block

* Remove instance variable

test/controllers/pages_controller_test.rb

@@ -0,0 +1,12 @@
+require "test_helper"
+
+class PagesControllerTest < ActionDispatch::IntegrationTest
+  setup do
+    sign_in users(:bob)
+  end
+
+  test "dashboard" do
+    get root_path
+    assert_response :ok
+  end
+end