From 4bbd93ded1470993dd837b8b6a6de37a60895624 Mon Sep 17 00:00:00 2001
From: Mark Moser <mark.moser@perficient.com>
Date: Thu, 8 Sep 2016 10:25:33 -0500
Subject: [PATCH] rubocop noise: fixes FrozenStringLiteralComment

Adding the .ruby-verison file triggered previously un-run cops, specifically:

  This cop is designed to help upgrade to Ruby 3.0. It will add the
  comment `# frozen_string_literal: true` to the top of files to enable
  frozen string literals. Frozen string literals will be default in Ruby
  3.0. The comment will be added below a shebang and encoding comment. The
  frozen string literal comment is only valid in Ruby 2.3+.

More info on rubocop [Automatic-Corrections](https://github.com/bbatsov/rubocop/wiki/Automatic-Corrections)
---
 .ruby-version                                                  | 2 +-
 Gemfile                                                        | 1 +
 Gemfile.lock                                                   | 2 +-
 Guardfile                                                      | 1 +
 Rakefile                                                       | 1 +
 app/channels/application_cable/channel.rb                      | 1 +
 app/channels/application_cable/connection.rb                   | 1 +
 app/controllers/admin/auth_controller.rb                       | 1 +
 app/controllers/admin/profile_controller.rb                    | 1 +
 app/controllers/admin/question_controller.rb                   | 1 +
 app/controllers/admin/quiz_controller.rb                       | 1 +
 app/controllers/admin/user_controller.rb                       | 1 +
 app/controllers/admin_controller.rb                            | 1 +
 app/controllers/application_controller.rb                      | 1 +
 app/controllers/candidate_controller.rb                        | 1 +
 app/controllers/quiz_controller.rb                             | 1 +
 app/controllers/recruiter_controller.rb                        | 1 +
 app/controllers/review_controller.rb                           | 1 +
 app/helpers/application_helper.rb                              | 1 +
 app/jobs/application_job.rb                                    | 1 +
 app/mailers/application_mailer.rb                              | 1 +
 app/mailers/candidate_mailer.rb                                | 1 +
 app/mailers/recruiter_mailer.rb                                | 1 +
 app/mailers/reviewer_mailer.rb                                 | 1 +
 app/mailers/user_mailer.rb                                     | 1 +
 app/models/answer.rb                                           | 1 +
 app/models/application_record.rb                               | 1 +
 app/models/candidate.rb                                        | 1 +
 app/models/question.rb                                         | 1 +
 app/models/quiz.rb                                             | 1 +
 app/models/user.rb                                             | 1 +
 app/services/crypt_serializer.rb                               | 1 +
 app/services/skill_config.rb                                   | 1 +
 app/validators/answer_format_validator.rb                      | 1 +
 app/validators/email_format_validator.rb                       | 1 +
 app/validators/input_options_presence_validator.rb             | 1 +
 app/workers/candidate_quiz.rb                                  | 1 +
 app/workers/candidate_quiz_question.rb                         | 1 +
 app/workers/quiz_status.rb                                     | 1 +
 app/workers/reminder.rb                                        | 1 +
 config.ru                                                      | 1 +
 config/application.rb                                          | 1 +
 config/boot.rb                                                 | 1 +
 config/environment.rb                                          | 1 +
 config/environments/development.rb                             | 1 +
 config/environments/production.rb                              | 1 +
 config/environments/test.rb                                    | 1 +
 config/initializers/application_controller_renderer.rb         | 1 +
 config/initializers/assets.rb                                  | 1 +
 config/initializers/backtrace_silencers.rb                     | 1 +
 config/initializers/cookies_serializer.rb                      | 1 +
 config/initializers/custom_error_wrapper.rb                    | 1 +
 config/initializers/filter_parameter_logging.rb                | 1 +
 config/initializers/inflections.rb                             | 1 +
 config/initializers/mailjet.rb                                 | 1 +
 config/initializers/mime_types.rb                              | 1 +
 config/initializers/new_framework_defaults.rb                  | 1 +
 config/initializers/session_store.rb                           | 1 +
 config/initializers/wrap_parameters.rb                         | 1 +
 config/puma.rb                                                 | 1 +
 config/routes.rb                                               | 1 +
 config/spring.rb                                               | 1 +
 db/migrate/20160726193255_db_init.rb                           | 1 +
 db/migrate/20160727154057_add_quiz_to_candidate.rb             | 1 +
 db/migrate/20160803003932_add_attachments_to_questions.rb      | 1 +
 db/migrate/20160818225721_add_name_to_quiz.rb                  | 1 +
 db/migrate/20160824183159_add_resets_to_users.rb               | 1 +
 db/migrate/20160826200610_encode_candidate_emails.rb           | 1 +
 lib/tasks/reminders.rake                                       | 1 +
 test/controllers/admin/auth_controller_test.rb                 | 1 +
 test/controllers/admin/profile_controller_test.rb              | 1 +
 test/controllers/admin/question_controller_test.rb             | 1 +
 test/controllers/admin/quiz_controller_test.rb                 | 1 +
 test/controllers/admin/user_controller_test.rb                 | 1 +
 test/controllers/admin_controller_test.rb                      | 1 +
 test/controllers/application_controller_test.rb                | 1 +
 test/controllers/candidate_controller_test.rb                  | 1 +
 test/controllers/quiz_controller_test.rb                       | 1 +
 test/controllers/recruiter_controller_test.rb                  | 1 +
 test/controllers/review_controller_test.rb                     | 1 +
 test/integration/question_attachments_test.rb                  | 1 +
 test/integration/question_flow_test.rb                         | 1 +
 test/integration/question_live_coder_test.rb                   | 1 +
 test/mailers/candidate_mailer_test.rb                          | 1 +
 test/mailers/previews/candidate_mailer_preview.rb              | 1 +
 test/mailers/previews/recruiter_mailer_preview.rb              | 1 +
 test/mailers/previews/reviewer_mailer_preview.rb               | 1 +
 test/mailers/previews/user_mailer_preview.rb                   | 1 +
 test/mailers/recruiter_mailer_test.rb                          | 1 +
 test/mailers/reviewer_mailer_test.rb                           | 1 +
 test/mailers/user_mailer_test.rb                               | 1 +
 test/models/answer_test.rb                                     | 1 +
 test/models/candidate_test.rb                                  | 1 +
 test/models/question_test.rb                                   | 1 +
 test/models/quiz_test.rb                                       | 1 +
 test/models/user_test.rb                                       | 1 +
 test/services/crypt_serializer_test.rb                         | 1 +
 test/services/skill_config_test.rb                             | 1 +
 test/test_helper.rb                                            | 1 +
 test/test_helpers/answer_validatable.rb                        | 1 +
 test/test_helpers/email_validatable.rb                         | 1 +
 test/test_helpers/input_options_validatable.rb                 | 1 +
 test/validators/answer_format_validator/checkbox_other_test.rb | 1 +
 test/validators/answer_format_validator/checkbox_test.rb       | 1 +
 test/validators/answer_format_validator/live_code_test.rb      | 1 +
 test/validators/answer_format_validator/radio_other_test.rb    | 1 +
 test/validators/answer_format_validator/radio_test.rb          | 1 +
 test/validators/answer_format_validator/text_test.rb           | 1 +
 test/validators/email_format_validator_test.rb                 | 1 +
 test/validators/input_options_presence_validator_test.rb       | 1 +
 test/workers/candidate_quiz_question_test.rb                   | 1 +
 test/workers/candidate_quiz_test.rb                            | 1 +
 test/workers/quiz_status_test.rb                               | 1 +
 test/workers/reminder_test.rb                                  | 1 +
 114 files changed, 114 insertions(+), 2 deletions(-)

diff --git a/.ruby-version b/.ruby-version
index fd12b58..2bf1c1c 100644
--- a/.ruby-version
+++ b/.ruby-version
@@ -1 +1 @@
-rvm --ruby-version use 2.3.1
\ No newline at end of file
+2.3.1
diff --git a/Gemfile b/Gemfile
index 8c9a143..0bed934 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 source 'https://rubygems.org'
 
 gem 'figaro', '~> 1.1.1'
diff --git a/Gemfile.lock b/Gemfile.lock
index c9cce22..8d3e6f0 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -268,7 +268,7 @@ GEM
     unf (0.1.4)
       unf_ext
     unf_ext (0.0.7.2)
-    unicode-display_width (1.1.0)
+    unicode-display_width (1.1.1)
     web-console (3.3.1)
       actionview (>= 5.0)
       activemodel (>= 5.0)
diff --git a/Guardfile b/Guardfile
index 73cc130..c6a64d4 100644
--- a/Guardfile
+++ b/Guardfile
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 # A sample Guardfile
 # More info at https://github.com/guard/guard#readme
 
diff --git a/Rakefile b/Rakefile
index e85f913..84f2bc3 100644
--- a/Rakefile
+++ b/Rakefile
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 # Add your own tasks in files placed in lib/tasks ending in .rake,
 # for example lib/tasks/capistrano.rake, and they will automatically be available to Rake.
 
diff --git a/app/channels/application_cable/channel.rb b/app/channels/application_cable/channel.rb
index d672697..51e3e93 100644
--- a/app/channels/application_cable/channel.rb
+++ b/app/channels/application_cable/channel.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 module ApplicationCable
   class Channel < ActionCable::Channel::Base
   end
diff --git a/app/channels/application_cable/connection.rb b/app/channels/application_cable/connection.rb
index 0ff5442..fa70319 100644
--- a/app/channels/application_cable/connection.rb
+++ b/app/channels/application_cable/connection.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 module ApplicationCable
   class Connection < ActionCable::Connection::Base
   end
diff --git a/app/controllers/admin/auth_controller.rb b/app/controllers/admin/auth_controller.rb
index cb097fc..ef611a0 100644
--- a/app/controllers/admin/auth_controller.rb
+++ b/app/controllers/admin/auth_controller.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 module Admin
   class AuthController < AdminController
     skip_before_action :authorize_admin
diff --git a/app/controllers/admin/profile_controller.rb b/app/controllers/admin/profile_controller.rb
index 08f8f32..0894a36 100644
--- a/app/controllers/admin/profile_controller.rb
+++ b/app/controllers/admin/profile_controller.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 module Admin
   class ProfileController < AdminController
     def view
diff --git a/app/controllers/admin/question_controller.rb b/app/controllers/admin/question_controller.rb
index 7ee4266..c3b74f4 100644
--- a/app/controllers/admin/question_controller.rb
+++ b/app/controllers/admin/question_controller.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 module Admin
   class QuestionController < AdminController
     def index
diff --git a/app/controllers/admin/quiz_controller.rb b/app/controllers/admin/quiz_controller.rb
index 82c2de4..758516f 100644
--- a/app/controllers/admin/quiz_controller.rb
+++ b/app/controllers/admin/quiz_controller.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 module Admin
   class QuizController < AdminController
     def index
diff --git a/app/controllers/admin/user_controller.rb b/app/controllers/admin/user_controller.rb
index 85b4e71..850e053 100644
--- a/app/controllers/admin/user_controller.rb
+++ b/app/controllers/admin/user_controller.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 module Admin
   class UserController < AdminController
     def index
diff --git a/app/controllers/admin_controller.rb b/app/controllers/admin_controller.rb
index 37a79b4..27eec24 100644
--- a/app/controllers/admin_controller.rb
+++ b/app/controllers/admin_controller.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 class AdminController < ApplicationController
   layout 'admin'
   before_action :authorize_admin
diff --git a/app/controllers/application_controller.rb b/app/controllers/application_controller.rb
index 430edcd..37fe04f 100644
--- a/app/controllers/application_controller.rb
+++ b/app/controllers/application_controller.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 class ApplicationController < ActionController::Base
   protect_from_forgery with: :exception
 
diff --git a/app/controllers/candidate_controller.rb b/app/controllers/candidate_controller.rb
index 60e93e7..78a5ec0 100644
--- a/app/controllers/candidate_controller.rb
+++ b/app/controllers/candidate_controller.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 class CandidateController < ApplicationController
   before_action :authorize_candidate, except: [:login, :validate, :live_coder]
   before_action :send_to_oops, only: [:login]
diff --git a/app/controllers/quiz_controller.rb b/app/controllers/quiz_controller.rb
index 0cb3858..74c191e 100644
--- a/app/controllers/quiz_controller.rb
+++ b/app/controllers/quiz_controller.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 class QuizController < ApplicationController
   before_action :authorize_candidate
 
diff --git a/app/controllers/recruiter_controller.rb b/app/controllers/recruiter_controller.rb
index 23a3238..c157fc8 100644
--- a/app/controllers/recruiter_controller.rb
+++ b/app/controllers/recruiter_controller.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 class RecruiterController < ApplicationController
   before_action :authorize_recruiter, except: [:login, :auth]
 
diff --git a/app/controllers/review_controller.rb b/app/controllers/review_controller.rb
index 1077fbe..d810bad 100644
--- a/app/controllers/review_controller.rb
+++ b/app/controllers/review_controller.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 class ReviewController < ApplicationController
   before_action :authorize_reviewer, except: [:login, :auth]
 
diff --git a/app/helpers/application_helper.rb b/app/helpers/application_helper.rb
index cf00ea8..99e9420 100644
--- a/app/helpers/application_helper.rb
+++ b/app/helpers/application_helper.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 module ApplicationHelper
   def experience_options val
     options_for_select([
diff --git a/app/jobs/application_job.rb b/app/jobs/application_job.rb
index a009ace..32fe70b 100644
--- a/app/jobs/application_job.rb
+++ b/app/jobs/application_job.rb
@@ -1,2 +1,3 @@
+# frozen_string_literal: true
 class ApplicationJob < ActiveJob::Base
 end
diff --git a/app/mailers/application_mailer.rb b/app/mailers/application_mailer.rb
index e21ed33..6f7e596 100644
--- a/app/mailers/application_mailer.rb
+++ b/app/mailers/application_mailer.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 class ApplicationMailer < ActionMailer::Base
   default from: ENV['default_mail_from']
   layout 'mailer'
diff --git a/app/mailers/candidate_mailer.rb b/app/mailers/candidate_mailer.rb
index ac3486d..f3611bc 100644
--- a/app/mailers/candidate_mailer.rb
+++ b/app/mailers/candidate_mailer.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 class CandidateMailer < ApplicationMailer
   def welcome candidate
     @candidate = candidate
diff --git a/app/mailers/recruiter_mailer.rb b/app/mailers/recruiter_mailer.rb
index 06fb44b..8ef985c 100644
--- a/app/mailers/recruiter_mailer.rb
+++ b/app/mailers/recruiter_mailer.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 class RecruiterMailer < ApplicationMailer
   def candidate_created candidate
     @candidate = candidate
diff --git a/app/mailers/reviewer_mailer.rb b/app/mailers/reviewer_mailer.rb
index 325df53..b4eee1b 100644
--- a/app/mailers/reviewer_mailer.rb
+++ b/app/mailers/reviewer_mailer.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 class ReviewerMailer < ApplicationMailer
   def candidate_submission candidate
     @candidate = candidate
diff --git a/app/mailers/user_mailer.rb b/app/mailers/user_mailer.rb
index 3ea1484..b345d1b 100644
--- a/app/mailers/user_mailer.rb
+++ b/app/mailers/user_mailer.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 class UserMailer < ApplicationMailer
   def password_reset user
     @user = user
diff --git a/app/models/answer.rb b/app/models/answer.rb
index 71a91aa..6983ff4 100644
--- a/app/models/answer.rb
+++ b/app/models/answer.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 class Answer < ApplicationRecord
   serialize :answer
 
diff --git a/app/models/application_record.rb b/app/models/application_record.rb
index 141a300..736c87f 100644
--- a/app/models/application_record.rb
+++ b/app/models/application_record.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 class ApplicationRecord < ActiveRecord::Base
   self.abstract_class = true
 
diff --git a/app/models/candidate.rb b/app/models/candidate.rb
index b54bea3..69c4b2b 100644
--- a/app/models/candidate.rb
+++ b/app/models/candidate.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 class Candidate < ApplicationRecord
   belongs_to :quiz
   has_many :questions, -> { order("sort") }, through: :quiz
diff --git a/app/models/question.rb b/app/models/question.rb
index 2b8cac3..6d2a993 100644
--- a/app/models/question.rb
+++ b/app/models/question.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 class Question < ApplicationRecord
   serialize :input_options
 
diff --git a/app/models/quiz.rb b/app/models/quiz.rb
index 7c2c5c1..f8d0b23 100644
--- a/app/models/quiz.rb
+++ b/app/models/quiz.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 class Quiz < ApplicationRecord
   has_many :questions, -> { order(:sort) }
   has_many :candidates
diff --git a/app/models/user.rb b/app/models/user.rb
index 3b0c1b1..8f24471 100644
--- a/app/models/user.rb
+++ b/app/models/user.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 class User < ApplicationRecord
   has_secure_password
   has_many :candidates, foreign_key: "recruiter_id"
diff --git a/app/services/crypt_serializer.rb b/app/services/crypt_serializer.rb
index bf39363..74a5ad9 100644
--- a/app/services/crypt_serializer.rb
+++ b/app/services/crypt_serializer.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require 'openssl'
 require 'base64'
 
diff --git a/app/services/skill_config.rb b/app/services/skill_config.rb
index 6f3c718..f4d5075 100644
--- a/app/services/skill_config.rb
+++ b/app/services/skill_config.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 class SkillConfig < Settingslogic
   source "#{Rails.root}/config/application.yml"
   namespace Rails.env
diff --git a/app/validators/answer_format_validator.rb b/app/validators/answer_format_validator.rb
index 99f7d49..6994631 100644
--- a/app/validators/answer_format_validator.rb
+++ b/app/validators/answer_format_validator.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 class AnswerFormatValidator < ActiveModel::EachValidator
   def validate_each(record, attribute, value)
     send(record.question.input_type, record, attribute, value)
diff --git a/app/validators/email_format_validator.rb b/app/validators/email_format_validator.rb
index 2418922..5b889a5 100644
--- a/app/validators/email_format_validator.rb
+++ b/app/validators/email_format_validator.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 class EmailFormatValidator < ActiveModel::EachValidator
   def validate_each(record, attribute, value)
     # EMAIL regex test
diff --git a/app/validators/input_options_presence_validator.rb b/app/validators/input_options_presence_validator.rb
index 0bb6284..5a5c60d 100644
--- a/app/validators/input_options_presence_validator.rb
+++ b/app/validators/input_options_presence_validator.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 class InputOptionsPresenceValidator < ActiveModel::EachValidator
   def validate_each(record, attribute, value)
     return true unless record.input_type =~ /radio|check/i
diff --git a/app/workers/candidate_quiz.rb b/app/workers/candidate_quiz.rb
index bedc7a9..a7d74e7 100644
--- a/app/workers/candidate_quiz.rb
+++ b/app/workers/candidate_quiz.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 class CandidateQuiz
   attr_reader :candidate_id
 
diff --git a/app/workers/candidate_quiz_question.rb b/app/workers/candidate_quiz_question.rb
index 20e4d9b..dad8a16 100644
--- a/app/workers/candidate_quiz_question.rb
+++ b/app/workers/candidate_quiz_question.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 class CandidateQuizQuestion
   attr_reader :row
 
diff --git a/app/workers/quiz_status.rb b/app/workers/quiz_status.rb
index 8245c8e..f97037e 100644
--- a/app/workers/quiz_status.rb
+++ b/app/workers/quiz_status.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 class QuizStatus
   attr_reader :candidate
 
diff --git a/app/workers/reminder.rb b/app/workers/reminder.rb
index 29584e2..7437f04 100644
--- a/app/workers/reminder.rb
+++ b/app/workers/reminder.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 class Reminder
   def initialize
     @collection = reminder_collection
diff --git a/config.ru b/config.ru
index f7ba0b5..7eae264 100644
--- a/config.ru
+++ b/config.ru
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 # This file is used by Rack-based servers to start the application.
 
 require_relative 'config/environment'
diff --git a/config/application.rb b/config/application.rb
index d04f3ab..98b8077 100644
--- a/config/application.rb
+++ b/config/application.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require_relative 'boot'
 
 require 'rails/all'
diff --git a/config/boot.rb b/config/boot.rb
index 30f5120..9be337a 100644
--- a/config/boot.rb
+++ b/config/boot.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 ENV['BUNDLE_GEMFILE'] ||= File.expand_path('../Gemfile', __dir__)
 
 require 'bundler/setup' # Set up gems listed in the Gemfile.
diff --git a/config/environment.rb b/config/environment.rb
index 426333b..12ea62f 100644
--- a/config/environment.rb
+++ b/config/environment.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 # Load the Rails application.
 require_relative 'application'
 
diff --git a/config/environments/development.rb b/config/environments/development.rb
index 88c86ee..c10e626 100644
--- a/config/environments/development.rb
+++ b/config/environments/development.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 Rails.application.configure do
   # Settings specified here will take precedence over those in config/application.rb.
 
diff --git a/config/environments/production.rb b/config/environments/production.rb
index 2b66046..076378e 100644
--- a/config/environments/production.rb
+++ b/config/environments/production.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 Rails.application.configure do
   # Settings specified here will take precedence over those in config/application.rb.
 
diff --git a/config/environments/test.rb b/config/environments/test.rb
index bb560d5..826c3a5 100644
--- a/config/environments/test.rb
+++ b/config/environments/test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 Rails.application.configure do
   # Settings specified here will take precedence over those in config/application.rb.
 
diff --git a/config/initializers/application_controller_renderer.rb b/config/initializers/application_controller_renderer.rb
index 51639b6..315ac48 100644
--- a/config/initializers/application_controller_renderer.rb
+++ b/config/initializers/application_controller_renderer.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 # Be sure to restart your server when you modify this file.
 
 # ApplicationController.renderer.defaults.merge!(
diff --git a/config/initializers/assets.rb b/config/initializers/assets.rb
index 865c130..4607738 100644
--- a/config/initializers/assets.rb
+++ b/config/initializers/assets.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 # Be sure to restart your server when you modify this file.
 
 # Version of your assets, change this if you want to expire all your assets.
diff --git a/config/initializers/backtrace_silencers.rb b/config/initializers/backtrace_silencers.rb
index 59385cd..d0f0d3b 100644
--- a/config/initializers/backtrace_silencers.rb
+++ b/config/initializers/backtrace_silencers.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 # Be sure to restart your server when you modify this file.
 
 # You can add backtrace silencers for libraries that you're using but don't wish to see in your backtraces.
diff --git a/config/initializers/cookies_serializer.rb b/config/initializers/cookies_serializer.rb
index 5a6a32d..2a72959 100644
--- a/config/initializers/cookies_serializer.rb
+++ b/config/initializers/cookies_serializer.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 # Be sure to restart your server when you modify this file.
 
 # Specify a serializer for the signed and encrypted cookie jars.
diff --git a/config/initializers/custom_error_wrapper.rb b/config/initializers/custom_error_wrapper.rb
index 67cc908..0d627f3 100644
--- a/config/initializers/custom_error_wrapper.rb
+++ b/config/initializers/custom_error_wrapper.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 # TODO: needs better wrapping instead of nuking
 # https://rubyplus.com/articles/3401
 ActionView::Base.field_error_proc = proc do |html_tag, _instance|
diff --git a/config/initializers/filter_parameter_logging.rb b/config/initializers/filter_parameter_logging.rb
index 4a994e1..b7fe123 100644
--- a/config/initializers/filter_parameter_logging.rb
+++ b/config/initializers/filter_parameter_logging.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 # Be sure to restart your server when you modify this file.
 
 # Configure sensitive parameters which will be filtered from the log file.
diff --git a/config/initializers/inflections.rb b/config/initializers/inflections.rb
index ac033bf..aa7435f 100644
--- a/config/initializers/inflections.rb
+++ b/config/initializers/inflections.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 # Be sure to restart your server when you modify this file.
 
 # Add new inflection rules using the following format. Inflections
diff --git a/config/initializers/mailjet.rb b/config/initializers/mailjet.rb
index 2481ab2..4fa89bc 100644
--- a/config/initializers/mailjet.rb
+++ b/config/initializers/mailjet.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 Mailjet.configure do |config|
   config.api_key = ENV['mailjet_key']
   config.secret_key = ENV['mailjet_secret']
diff --git a/config/initializers/mime_types.rb b/config/initializers/mime_types.rb
index dc18996..6e1d16f 100644
--- a/config/initializers/mime_types.rb
+++ b/config/initializers/mime_types.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 # Be sure to restart your server when you modify this file.
 
 # Add new mime types for use in respond_to blocks:
diff --git a/config/initializers/new_framework_defaults.rb b/config/initializers/new_framework_defaults.rb
index 0706caf..d3c12d7 100644
--- a/config/initializers/new_framework_defaults.rb
+++ b/config/initializers/new_framework_defaults.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 # Be sure to restart your server when you modify this file.
 #
 # This file contains migration options to ease your Rails 5.0 upgrade.
diff --git a/config/initializers/session_store.rb b/config/initializers/session_store.rb
index 2c7c004..df5c83b 100644
--- a/config/initializers/session_store.rb
+++ b/config/initializers/session_store.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 # Be sure to restart your server when you modify this file.
 
 Rails.application.config.session_store :cookie_store, key: '_skill-assessment-app_session'
diff --git a/config/initializers/wrap_parameters.rb b/config/initializers/wrap_parameters.rb
index bbfc396..18c3825 100644
--- a/config/initializers/wrap_parameters.rb
+++ b/config/initializers/wrap_parameters.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 # Be sure to restart your server when you modify this file.
 
 # This file contains settings for ActionController::ParamsWrapper which
diff --git a/config/puma.rb b/config/puma.rb
index c7f311f..14a0f44 100644
--- a/config/puma.rb
+++ b/config/puma.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 # Puma can serve each request in a thread from an internal thread pool.
 # The `threads` method setting takes two numbers a minimum and maximum.
 # Any libraries that use thread pools should be configured to match
diff --git a/config/routes.rb b/config/routes.rb
index 3383a54..ca4a9dc 100644
--- a/config/routes.rb
+++ b/config/routes.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 Rails.application.routes.draw do
   post "/admin/login",              to: "admin/auth#auth",           as: :admin_auth
   get  "/admin/login",              to: "admin/auth#login",          as: :admin_login
diff --git a/config/spring.rb b/config/spring.rb
index c9119b4..312295f 100644
--- a/config/spring.rb
+++ b/config/spring.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 %w(
   .ruby-version
   .rbenv-vars
diff --git a/db/migrate/20160726193255_db_init.rb b/db/migrate/20160726193255_db_init.rb
index 6351352..9da2dd5 100644
--- a/db/migrate/20160726193255_db_init.rb
+++ b/db/migrate/20160726193255_db_init.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 class DbInit < ActiveRecord::Migration[5.0]
   def change
     create_table :candidates do |t|
diff --git a/db/migrate/20160727154057_add_quiz_to_candidate.rb b/db/migrate/20160727154057_add_quiz_to_candidate.rb
index 88ee3e2..d504fb0 100644
--- a/db/migrate/20160727154057_add_quiz_to_candidate.rb
+++ b/db/migrate/20160727154057_add_quiz_to_candidate.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 class AddQuizToCandidate < ActiveRecord::Migration[5.0]
   def change
     add_column :candidates, :quiz_id, :integer
diff --git a/db/migrate/20160803003932_add_attachments_to_questions.rb b/db/migrate/20160803003932_add_attachments_to_questions.rb
index 88333da..0773fef 100644
--- a/db/migrate/20160803003932_add_attachments_to_questions.rb
+++ b/db/migrate/20160803003932_add_attachments_to_questions.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 class AddAttachmentsToQuestions < ActiveRecord::Migration[5.0]
   def change
     add_column :questions, :attachment, :string
diff --git a/db/migrate/20160818225721_add_name_to_quiz.rb b/db/migrate/20160818225721_add_name_to_quiz.rb
index a8ecd97..ecbdb10 100644
--- a/db/migrate/20160818225721_add_name_to_quiz.rb
+++ b/db/migrate/20160818225721_add_name_to_quiz.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 class AddNameToQuiz < ActiveRecord::Migration[5.0]
   def change
     add_column :quizzes, :name, :string, after: :id
diff --git a/db/migrate/20160824183159_add_resets_to_users.rb b/db/migrate/20160824183159_add_resets_to_users.rb
index da9f93b..364e217 100644
--- a/db/migrate/20160824183159_add_resets_to_users.rb
+++ b/db/migrate/20160824183159_add_resets_to_users.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 class AddResetsToUsers < ActiveRecord::Migration[5.0]
   def change
     add_column :users, :reset_token, :string
diff --git a/db/migrate/20160826200610_encode_candidate_emails.rb b/db/migrate/20160826200610_encode_candidate_emails.rb
index 6872e22..d00d27c 100644
--- a/db/migrate/20160826200610_encode_candidate_emails.rb
+++ b/db/migrate/20160826200610_encode_candidate_emails.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 class EncodeCandidateEmails < ActiveRecord::Migration[5.0]
   def change
     sql = "select id, email from candidates;"
diff --git a/lib/tasks/reminders.rake b/lib/tasks/reminders.rake
index bd2ee48..2695aa6 100644
--- a/lib/tasks/reminders.rake
+++ b/lib/tasks/reminders.rake
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 namespace :reminders do
   desc "send reminders to stagnate quizes"
   task send_all: :environment do
diff --git a/test/controllers/admin/auth_controller_test.rb b/test/controllers/admin/auth_controller_test.rb
index f83e7ff..6ac928f 100644
--- a/test/controllers/admin/auth_controller_test.rb
+++ b/test/controllers/admin/auth_controller_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require 'test_helper'
 
 module Admin
diff --git a/test/controllers/admin/profile_controller_test.rb b/test/controllers/admin/profile_controller_test.rb
index 7f11332..ce3e01e 100644
--- a/test/controllers/admin/profile_controller_test.rb
+++ b/test/controllers/admin/profile_controller_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require 'test_helper'
 
 module Admin
diff --git a/test/controllers/admin/question_controller_test.rb b/test/controllers/admin/question_controller_test.rb
index a629bea..767eada 100644
--- a/test/controllers/admin/question_controller_test.rb
+++ b/test/controllers/admin/question_controller_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require 'test_helper'
 
 module Admin
diff --git a/test/controllers/admin/quiz_controller_test.rb b/test/controllers/admin/quiz_controller_test.rb
index b638661..cc1b435 100644
--- a/test/controllers/admin/quiz_controller_test.rb
+++ b/test/controllers/admin/quiz_controller_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require 'test_helper'
 
 module Admin
diff --git a/test/controllers/admin/user_controller_test.rb b/test/controllers/admin/user_controller_test.rb
index 6f0a311..4d034c6 100644
--- a/test/controllers/admin/user_controller_test.rb
+++ b/test/controllers/admin/user_controller_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require 'test_helper'
 
 module Admin
diff --git a/test/controllers/admin_controller_test.rb b/test/controllers/admin_controller_test.rb
index 0c0c0b1..56df4d6 100644
--- a/test/controllers/admin_controller_test.rb
+++ b/test/controllers/admin_controller_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require 'test_helper'
 
 class AdminControllerTest < ActionDispatch::IntegrationTest
diff --git a/test/controllers/application_controller_test.rb b/test/controllers/application_controller_test.rb
index 16068dc..189e330 100644
--- a/test/controllers/application_controller_test.rb
+++ b/test/controllers/application_controller_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require 'test_helper'
 
 class ApplicationControllerTest < ActionDispatch::IntegrationTest
diff --git a/test/controllers/candidate_controller_test.rb b/test/controllers/candidate_controller_test.rb
index d0258a1..f9128bc 100644
--- a/test/controllers/candidate_controller_test.rb
+++ b/test/controllers/candidate_controller_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require 'test_helper'
 
 class CandidateControllerTest < ActionDispatch::IntegrationTest
diff --git a/test/controllers/quiz_controller_test.rb b/test/controllers/quiz_controller_test.rb
index 843e037..ec11003 100644
--- a/test/controllers/quiz_controller_test.rb
+++ b/test/controllers/quiz_controller_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require 'test_helper'
 
 class QuizControllerTest < ActionDispatch::IntegrationTest
diff --git a/test/controllers/recruiter_controller_test.rb b/test/controllers/recruiter_controller_test.rb
index 41343cc..1398f11 100644
--- a/test/controllers/recruiter_controller_test.rb
+++ b/test/controllers/recruiter_controller_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require 'test_helper'
 
 class RecruiterControllerTest < ActionDispatch::IntegrationTest
diff --git a/test/controllers/review_controller_test.rb b/test/controllers/review_controller_test.rb
index b030c41..bb7b28e 100644
--- a/test/controllers/review_controller_test.rb
+++ b/test/controllers/review_controller_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require 'test_helper'
 
 class ReviewControllerTest < ActionDispatch::IntegrationTest
diff --git a/test/integration/question_attachments_test.rb b/test/integration/question_attachments_test.rb
index 4f25a90..e363ead 100644
--- a/test/integration/question_attachments_test.rb
+++ b/test/integration/question_attachments_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require 'test_helper'
 
 class QuestionAttachmentsTest < ActionDispatch::IntegrationTest
diff --git a/test/integration/question_flow_test.rb b/test/integration/question_flow_test.rb
index ee79aa8..dce3a52 100644
--- a/test/integration/question_flow_test.rb
+++ b/test/integration/question_flow_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require 'test_helper'
 
 class QuestionFlowTest < ActionDispatch::IntegrationTest
diff --git a/test/integration/question_live_coder_test.rb b/test/integration/question_live_coder_test.rb
index 59eed19..e7d0481 100644
--- a/test/integration/question_live_coder_test.rb
+++ b/test/integration/question_live_coder_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require 'test_helper'
 
 class QuestionLiveCoderTest < ActionDispatch::IntegrationTest
diff --git a/test/mailers/candidate_mailer_test.rb b/test/mailers/candidate_mailer_test.rb
index 1b41c27..00817fd 100644
--- a/test/mailers/candidate_mailer_test.rb
+++ b/test/mailers/candidate_mailer_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require 'test_helper'
 
 class CandidateMailerTest < ActionMailer::TestCase
diff --git a/test/mailers/previews/candidate_mailer_preview.rb b/test/mailers/previews/candidate_mailer_preview.rb
index 08ee6c9..888625e 100644
--- a/test/mailers/previews/candidate_mailer_preview.rb
+++ b/test/mailers/previews/candidate_mailer_preview.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 # Preview all emails at http://localhost:3000/rails/mailers/candidate_mailer
 class CandidateMailerPreview < ActionMailer::Preview
   def welcome
diff --git a/test/mailers/previews/recruiter_mailer_preview.rb b/test/mailers/previews/recruiter_mailer_preview.rb
index b739fb8..9a14fb3 100644
--- a/test/mailers/previews/recruiter_mailer_preview.rb
+++ b/test/mailers/previews/recruiter_mailer_preview.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 # Preview all emails at http://localhost:3000/rails/mailers/recruiter_mailer
 class RecruiterMailerPreview < ActionMailer::Preview
   def candidate_created
diff --git a/test/mailers/previews/reviewer_mailer_preview.rb b/test/mailers/previews/reviewer_mailer_preview.rb
index bf08208..df8b1cb 100644
--- a/test/mailers/previews/reviewer_mailer_preview.rb
+++ b/test/mailers/previews/reviewer_mailer_preview.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 # Preview all emails at http://localhost:3000/rails/mailers/reviewer_mailer
 class ReviewerMailerPreview < ActionMailer::Preview
   def candidate_submission
diff --git a/test/mailers/previews/user_mailer_preview.rb b/test/mailers/previews/user_mailer_preview.rb
index b303156..27b0d13 100644
--- a/test/mailers/previews/user_mailer_preview.rb
+++ b/test/mailers/previews/user_mailer_preview.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 # Preview all emails at http://localhost:3000/rails/mailers/user_mailer
 class UserMailerPreview < ActionMailer::Preview
   def password_reset
diff --git a/test/mailers/recruiter_mailer_test.rb b/test/mailers/recruiter_mailer_test.rb
index e6fabe4..5331ca9 100644
--- a/test/mailers/recruiter_mailer_test.rb
+++ b/test/mailers/recruiter_mailer_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require 'test_helper'
 
 class RecruiterMailerTest < ActionMailer::TestCase
diff --git a/test/mailers/reviewer_mailer_test.rb b/test/mailers/reviewer_mailer_test.rb
index 807f992..45bb811 100644
--- a/test/mailers/reviewer_mailer_test.rb
+++ b/test/mailers/reviewer_mailer_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require 'test_helper'
 
 class ReviewerMailerTest < ActionMailer::TestCase
diff --git a/test/mailers/user_mailer_test.rb b/test/mailers/user_mailer_test.rb
index de58eb7..4ef0c09 100644
--- a/test/mailers/user_mailer_test.rb
+++ b/test/mailers/user_mailer_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require 'test_helper'
 
 class UserMailerTest < ActionMailer::TestCase
diff --git a/test/models/answer_test.rb b/test/models/answer_test.rb
index c0af5c3..3950320 100644
--- a/test/models/answer_test.rb
+++ b/test/models/answer_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require 'test_helper'
 
 class AnswerTest < ActiveSupport::TestCase
diff --git a/test/models/candidate_test.rb b/test/models/candidate_test.rb
index 5707062..7cb0f5d 100644
--- a/test/models/candidate_test.rb
+++ b/test/models/candidate_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require 'test_helper'
 
 class CandidateTest < ActiveSupport::TestCase
diff --git a/test/models/question_test.rb b/test/models/question_test.rb
index ab2e1ec..13e958e 100644
--- a/test/models/question_test.rb
+++ b/test/models/question_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require 'test_helper'
 
 class QuestionTest < ActiveSupport::TestCase
diff --git a/test/models/quiz_test.rb b/test/models/quiz_test.rb
index f0c73ff..63a5253 100644
--- a/test/models/quiz_test.rb
+++ b/test/models/quiz_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require 'test_helper'
 
 class QuizTest < ActiveSupport::TestCase
diff --git a/test/models/user_test.rb b/test/models/user_test.rb
index 82f61e0..2a7931b 100644
--- a/test/models/user_test.rb
+++ b/test/models/user_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require 'test_helper'
 
 class UserTest < ActiveSupport::TestCase
diff --git a/test/services/crypt_serializer_test.rb b/test/services/crypt_serializer_test.rb
index c649076..2bcdd43 100644
--- a/test/services/crypt_serializer_test.rb
+++ b/test/services/crypt_serializer_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require 'test_helper'
 
 class CryptSerializerTest < ActiveSupport::TestCase
diff --git a/test/services/skill_config_test.rb b/test/services/skill_config_test.rb
index e72dfb5..8d6fcff 100644
--- a/test/services/skill_config_test.rb
+++ b/test/services/skill_config_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require 'test_helper'
 
 class SkillConfigTest < ActiveSupport::TestCase
diff --git a/test/test_helper.rb b/test/test_helper.rb
index a65e8ac..898806c 100644
--- a/test/test_helper.rb
+++ b/test/test_helper.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 ENV['RAILS_ENV'] ||= 'test'
 
 # https://github.com/colszowka/simplecov
diff --git a/test/test_helpers/answer_validatable.rb b/test/test_helpers/answer_validatable.rb
index cb2ba6d..e886459 100644
--- a/test/test_helpers/answer_validatable.rb
+++ b/test/test_helpers/answer_validatable.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 class AnswerValidatable
   include ActiveModel::Validations
 
diff --git a/test/test_helpers/email_validatable.rb b/test/test_helpers/email_validatable.rb
index f9920f0..475d157 100644
--- a/test/test_helpers/email_validatable.rb
+++ b/test/test_helpers/email_validatable.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 class EmailValidatable
   include ActiveModel::Validations
   attr_accessor :email
diff --git a/test/test_helpers/input_options_validatable.rb b/test/test_helpers/input_options_validatable.rb
index 85c26aa..b2673a7 100644
--- a/test/test_helpers/input_options_validatable.rb
+++ b/test/test_helpers/input_options_validatable.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 class InputOptionsValidatable
   include ActiveModel::Validations
   attr_accessor :input_type
diff --git a/test/validators/answer_format_validator/checkbox_other_test.rb b/test/validators/answer_format_validator/checkbox_other_test.rb
index 2d84926..702bb6f 100644
--- a/test/validators/answer_format_validator/checkbox_other_test.rb
+++ b/test/validators/answer_format_validator/checkbox_other_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require 'test_helper'
 
 # *_with_other answers expect a hash response:
diff --git a/test/validators/answer_format_validator/checkbox_test.rb b/test/validators/answer_format_validator/checkbox_test.rb
index 8899919..29c1881 100644
--- a/test/validators/answer_format_validator/checkbox_test.rb
+++ b/test/validators/answer_format_validator/checkbox_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require 'test_helper'
 
 class AnswerFormatValidatorTest < ActiveSupport::TestCase
diff --git a/test/validators/answer_format_validator/live_code_test.rb b/test/validators/answer_format_validator/live_code_test.rb
index 78709d3..c031c98 100644
--- a/test/validators/answer_format_validator/live_code_test.rb
+++ b/test/validators/answer_format_validator/live_code_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require 'test_helper'
 
 class AnswerFormatValidatorTest < ActiveSupport::TestCase
diff --git a/test/validators/answer_format_validator/radio_other_test.rb b/test/validators/answer_format_validator/radio_other_test.rb
index 8429f2b..397e049 100644
--- a/test/validators/answer_format_validator/radio_other_test.rb
+++ b/test/validators/answer_format_validator/radio_other_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require 'test_helper'
 
 # *_with_other answers expect a hash answer:
diff --git a/test/validators/answer_format_validator/radio_test.rb b/test/validators/answer_format_validator/radio_test.rb
index 6629d87..30141be 100644
--- a/test/validators/answer_format_validator/radio_test.rb
+++ b/test/validators/answer_format_validator/radio_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require 'test_helper'
 
 class AnswerFormatValidatorTest < ActiveSupport::TestCase
diff --git a/test/validators/answer_format_validator/text_test.rb b/test/validators/answer_format_validator/text_test.rb
index bd7e206..e1dca24 100644
--- a/test/validators/answer_format_validator/text_test.rb
+++ b/test/validators/answer_format_validator/text_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require 'test_helper'
 
 class AnswerFormatValidatorTest < ActiveSupport::TestCase
diff --git a/test/validators/email_format_validator_test.rb b/test/validators/email_format_validator_test.rb
index 619a6a7..151d88e 100644
--- a/test/validators/email_format_validator_test.rb
+++ b/test/validators/email_format_validator_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require 'test_helper'
 
 class EmailFormatValidatorTest < ActiveSupport::TestCase
diff --git a/test/validators/input_options_presence_validator_test.rb b/test/validators/input_options_presence_validator_test.rb
index b827af2..921c39e 100644
--- a/test/validators/input_options_presence_validator_test.rb
+++ b/test/validators/input_options_presence_validator_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require 'test_helper'
 
 class InputOptionsPresenceValidatorTest < ActiveSupport::TestCase
diff --git a/test/workers/candidate_quiz_question_test.rb b/test/workers/candidate_quiz_question_test.rb
index dde32f9..85b08d2 100644
--- a/test/workers/candidate_quiz_question_test.rb
+++ b/test/workers/candidate_quiz_question_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require 'test_helper'
 
 class CandidateQuizQuestionTest < ActiveSupport::TestCase
diff --git a/test/workers/candidate_quiz_test.rb b/test/workers/candidate_quiz_test.rb
index 0e4a0f3..f77267c 100644
--- a/test/workers/candidate_quiz_test.rb
+++ b/test/workers/candidate_quiz_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require 'test_helper'
 
 class CandidateQuizTest < ActiveSupport::TestCase
diff --git a/test/workers/quiz_status_test.rb b/test/workers/quiz_status_test.rb
index 615eac7..f79b299 100644
--- a/test/workers/quiz_status_test.rb
+++ b/test/workers/quiz_status_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require 'test_helper'
 
 class QuizStatusTest < ActiveSupport::TestCase
diff --git a/test/workers/reminder_test.rb b/test/workers/reminder_test.rb
index 00d25e5..32dabbb 100644
--- a/test/workers/reminder_test.rb
+++ b/test/workers/reminder_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require 'test_helper'
 
 class ReminderTest < ActiveSupport::TestCase