diff --git a/Gemfile b/Gemfile
index 522eeea..f466cf3 100644
--- a/Gemfile
+++ b/Gemfile
@@ -18,7 +18,7 @@ gem 'jbuilder', '~> 2.7'
 # Use Redis adapter to run Action Cable in production
 # gem 'redis', '~> 4.0'
 # Use Active Model has_secure_password
-# gem 'bcrypt', '~> 3.1.7'
+gem 'bcrypt', '~> 3.1.7'
 
 # Use Active Storage variant
 # gem 'image_processing', '~> 1.2'
@@ -28,13 +28,15 @@ gem 'bootsnap', '>= 1.4.2', require: false
 
 group :development, :test do
   # Call 'byebug' anywhere in the code to stop execution and get a debugger console
-  gem 'byebug', platforms: [:mri, :mingw, :x64_mingw]
+  gem 'byebug', platforms: %i[mri mingw x64_mingw]
+  gem 'factory_bot_rails'
+  gem 'rubocop'
 end
 
 group :development do
   # Access an interactive console on exception pages or by calling 'console' anywhere in the code.
-  gem 'web-console', '>= 3.3.0'
   gem 'listen', '~> 3.2'
+  gem 'web-console', '>= 3.3.0'
 end
 
 group :test do
@@ -46,4 +48,4 @@ group :test do
 end
 
 # Windows does not include zoneinfo files, so bundle the tzinfo-data gem
-gem 'tzinfo-data', platforms: [:mingw, :mswin, :x64_mingw, :jruby]
+# gem 'tzinfo-data', platforms: %i[mingw mswin x64_mingw jruby]
diff --git a/Gemfile.lock b/Gemfile.lock
index bf8bcae..f2b0a88 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -58,6 +58,8 @@ GEM
       zeitwerk (~> 2.2, >= 2.2.2)
     addressable (2.7.0)
       public_suffix (>= 2.0.2, < 5.0)
+    ast (2.4.1)
+    bcrypt (3.1.16)
     bindex (0.8.1)
     bootsnap (1.4.8)
       msgpack (~> 1.0)
@@ -75,6 +77,11 @@ GEM
     concurrent-ruby (1.1.7)
     crass (1.0.6)
     erubi (1.9.0)
+    factory_bot (6.1.0)
+      activesupport (>= 5.0.0)
+    factory_bot_rails (6.1.0)
+      factory_bot (~> 6.1.0)
+      railties (>= 5.0.0)
     ffi (1.13.1)
     globalid (0.4.2)
       activesupport (>= 4.2.0)
@@ -101,6 +108,9 @@ GEM
     nio4r (2.5.3)
     nokogiri (1.10.10)
       mini_portile2 (~> 2.4.0)
+    parallel (1.19.2)
+    parser (2.7.1.5)
+      ast (~> 2.4.1)
     pg (1.2.3)
     public_suffix (4.0.6)
     puma (4.3.6)
@@ -136,11 +146,25 @@ GEM
       method_source
       rake (>= 0.8.7)
       thor (>= 0.20.3, < 2.0)
+    rainbow (3.0.0)
     rake (13.0.1)
     rb-fsevent (0.10.4)
     rb-inotify (0.10.1)
       ffi (~> 1.0)
     regexp_parser (1.7.1)
+    rexml (3.2.4)
+    rubocop (0.92.0)
+      parallel (~> 1.10)
+      parser (>= 2.7.1.5)
+      rainbow (>= 2.2.2, < 4.0)
+      regexp_parser (>= 1.7)
+      rexml
+      rubocop-ast (>= 0.5.0)
+      ruby-progressbar (~> 1.7)
+      unicode-display_width (>= 1.4.0, < 2.0)
+    rubocop-ast (0.7.1)
+      parser (>= 2.7.1.5)
+    ruby-progressbar (1.10.1)
     rubyzip (2.3.0)
     sass-rails (6.0.0)
       sassc-rails (~> 2.1, >= 2.1.1)
@@ -167,6 +191,7 @@ GEM
     tilt (2.0.10)
     tzinfo (1.2.7)
       thread_safe (~> 0.1)
+    unicode-display_width (1.7.0)
     web-console (4.0.4)
       actionview (>= 6.0.0)
       activemodel (>= 6.0.0)
@@ -191,17 +216,19 @@ PLATFORMS
   ruby
 
 DEPENDENCIES
+  bcrypt (~> 3.1.7)
   bootsnap (>= 1.4.2)
   byebug
   capybara (>= 2.15)
+  factory_bot_rails
   jbuilder (~> 2.7)
   listen (~> 3.2)
   pg (>= 0.18, < 2.0)
   puma (~> 4.1)
   rails (~> 6.0.3, >= 6.0.3.3)
+  rubocop
   sass-rails (>= 6)
   selenium-webdriver
-  tzinfo-data
   web-console (>= 3.3.0)
   webdrivers
   webpacker (~> 4.0)
diff --git a/app/models/admin.rb b/app/models/admin.rb
new file mode 100644
index 0000000..2850a1a
--- /dev/null
+++ b/app/models/admin.rb
@@ -0,0 +1,2 @@
+class Admin < User
+end
diff --git a/app/models/developer.rb b/app/models/developer.rb
new file mode 100644
index 0000000..caa9707
--- /dev/null
+++ b/app/models/developer.rb
@@ -0,0 +1,2 @@
+class Developer < User
+end
diff --git a/app/models/manager.rb b/app/models/manager.rb
new file mode 100644
index 0000000..89a5f0c
--- /dev/null
+++ b/app/models/manager.rb
@@ -0,0 +1,2 @@
+class Manager < User
+end
diff --git a/app/models/task.rb b/app/models/task.rb
new file mode 100644
index 0000000..3c23424
--- /dev/null
+++ b/app/models/task.rb
@@ -0,0 +1,2 @@
+class Task < ApplicationRecord
+end
diff --git a/app/models/user.rb b/app/models/user.rb
new file mode 100644
index 0000000..d67da20
--- /dev/null
+++ b/app/models/user.rb
@@ -0,0 +1,3 @@
+class User < ApplicationRecord
+  has_secure_password
+end
diff --git a/bin/bundle b/bin/bundle
index a71368e..b9a7b0f 100755
--- a/bin/bundle
+++ b/bin/bundle
@@ -8,7 +8,7 @@
 # this file is here to facilitate running it.
 #
 
-require "rubygems"
+require 'rubygems'
 
 m = Module.new do
   module_function
@@ -18,36 +18,36 @@ m = Module.new do
   end
 
   def env_var_version
-    ENV["BUNDLER_VERSION"]
+    ENV['BUNDLER_VERSION']
   end
 
   def cli_arg_version
     return unless invoked_as_script? # don't want to hijack other binstubs
-    return unless "update".start_with?(ARGV.first || " ") # must be running `bundle update`
+    return unless 'update'.start_with?(ARGV.first || ' ') # must be running `bundle update`
+
     bundler_version = nil
     update_index = nil
     ARGV.each_with_index do |a, i|
-      if update_index && update_index.succ == i && a =~ Gem::Version::ANCHORED_VERSION_PATTERN
-        bundler_version = a
-      end
+      bundler_version = a if update_index && update_index.succ == i && a =~ Gem::Version::ANCHORED_VERSION_PATTERN
       next unless a =~ /\A--bundler(?:[= ](#{Gem::Version::VERSION_PATTERN}))?\z/
-      bundler_version = $1
+
+      bundler_version = Regexp.last_match(1)
       update_index = i
     end
     bundler_version
   end
 
   def gemfile
-    gemfile = ENV["BUNDLE_GEMFILE"]
+    gemfile = ENV['BUNDLE_GEMFILE']
     return gemfile if gemfile && !gemfile.empty?
 
-    File.expand_path("../../Gemfile", __FILE__)
+    File.expand_path('../Gemfile', __dir__)
   end
 
   def lockfile
     lockfile =
       case File.basename(gemfile)
-      when "gems.rb" then gemfile.sub(/\.rb$/, gemfile)
+      when 'gems.rb' then gemfile.sub(/\.rb$/, gemfile)
       else "#{gemfile}.lock"
       end
     File.expand_path(lockfile)
@@ -55,15 +55,17 @@ m = Module.new do
 
   def lockfile_version
     return unless File.file?(lockfile)
+
     lockfile_contents = File.read(lockfile)
     return unless lockfile_contents =~ /\n\nBUNDLED WITH\n\s{2,}(#{Gem::Version::VERSION_PATTERN})\n/
+
     Regexp.last_match(1)
   end
 
   def bundler_version
     @bundler_version ||=
       env_var_version || cli_arg_version ||
-        lockfile_version
+      lockfile_version
   end
 
   def bundler_requirement
@@ -73,28 +75,32 @@ m = Module.new do
 
     requirement = bundler_gem_version.approximate_recommendation
 
-    return requirement unless Gem::Version.new(Gem::VERSION) < Gem::Version.new("2.7.0")
+    return requirement unless Gem::Version.new(Gem::VERSION) < Gem::Version.new('2.7.0')
 
-    requirement += ".a" if bundler_gem_version.prerelease?
+    requirement += '.a' if bundler_gem_version.prerelease?
 
     requirement
   end
 
   def load_bundler!
-    ENV["BUNDLE_GEMFILE"] ||= gemfile
+    ENV['BUNDLE_GEMFILE'] ||= gemfile
 
     activate_bundler
   end
 
   def activate_bundler
     gem_error = activation_error_handling do
-      gem "bundler", bundler_requirement
+      gem 'bundler', bundler_requirement
     end
     return if gem_error.nil?
+
     require_error = activation_error_handling do
-      require "bundler/version"
+      require 'bundler/version'
+    end
+    if require_error.nil? && Gem::Requirement.new(bundler_requirement).satisfied_by?(Gem::Version.new(Bundler::VERSION))
+      return
     end
-    return if require_error.nil? && Gem::Requirement.new(bundler_requirement).satisfied_by?(Gem::Version.new(Bundler::VERSION))
+
     warn "Activating bundler (#{bundler_requirement}) failed:\n#{gem_error.message}\n\nTo install the version of bundler this project requires, run `gem install bundler -v '#{bundler_requirement}'`"
     exit 42
   end
@@ -109,6 +115,4 @@ end
 
 m.load_bundler!
 
-if m.invoked_as_script?
-  load Gem.bin_path("bundler", "bundle")
-end
+load Gem.bin_path('bundler', 'bundle') if m.invoked_as_script?
diff --git a/bin/webpack b/bin/webpack
index 1031168..d922a7d 100755
--- a/bin/webpack
+++ b/bin/webpack
@@ -1,18 +1,18 @@
 #!/usr/bin/env ruby
 
-ENV["RAILS_ENV"] ||= ENV["RACK_ENV"] || "development"
-ENV["NODE_ENV"]  ||= "development"
+ENV['RAILS_ENV'] ||= ENV['RACK_ENV'] || 'development'
+ENV['NODE_ENV']  ||= 'development'
 
-require "pathname"
-ENV["BUNDLE_GEMFILE"] ||= File.expand_path("../../Gemfile",
-  Pathname.new(__FILE__).realpath)
+require 'pathname'
+ENV['BUNDLE_GEMFILE'] ||= File.expand_path('../../Gemfile',
+                                           Pathname.new(__FILE__).realpath)
 
-require "bundler/setup"
+require 'bundler/setup'
 
-require "webpacker"
-require "webpacker/webpack_runner"
+require 'webpacker'
+require 'webpacker/webpack_runner'
 
-APP_ROOT = File.expand_path("..", __dir__)
+APP_ROOT = File.expand_path('..', __dir__)
 Dir.chdir(APP_ROOT) do
   Webpacker::WebpackRunner.run(ARGV)
 end
diff --git a/bin/webpack-dev-server b/bin/webpack-dev-server
index dd96627..4e5f40d 100755
--- a/bin/webpack-dev-server
+++ b/bin/webpack-dev-server
@@ -1,18 +1,18 @@
 #!/usr/bin/env ruby
 
-ENV["RAILS_ENV"] ||= ENV["RACK_ENV"] || "development"
-ENV["NODE_ENV"]  ||= "development"
+ENV['RAILS_ENV'] ||= ENV['RACK_ENV'] || 'development'
+ENV['NODE_ENV']  ||= 'development'
 
-require "pathname"
-ENV["BUNDLE_GEMFILE"] ||= File.expand_path("../../Gemfile",
-  Pathname.new(__FILE__).realpath)
+require 'pathname'
+ENV['BUNDLE_GEMFILE'] ||= File.expand_path('../../Gemfile',
+                                           Pathname.new(__FILE__).realpath)
 
-require "bundler/setup"
+require 'bundler/setup'
 
-require "webpacker"
-require "webpacker/dev_server_runner"
+require 'webpacker'
+require 'webpacker/dev_server_runner'
 
-APP_ROOT = File.expand_path("..", __dir__)
+APP_ROOT = File.expand_path('..', __dir__)
 Dir.chdir(APP_ROOT) do
   Webpacker::DevServerRunner.run(ARGV)
 end
diff --git a/bin/yarn b/bin/yarn
index 460dd56..d3627c3 100755
--- a/bin/yarn
+++ b/bin/yarn
@@ -1,11 +1,9 @@
 #!/usr/bin/env ruby
 APP_ROOT = File.expand_path('..', __dir__)
 Dir.chdir(APP_ROOT) do
-  begin
-    exec "yarnpkg", *ARGV
-  rescue Errno::ENOENT
-    $stderr.puts "Yarn executable was not detected in the system."
-    $stderr.puts "Download Yarn at https://yarnpkg.com/en/docs/install"
-    exit 1
-  end
+  exec 'yarnpkg', *ARGV
+rescue Errno::ENOENT
+  warn 'Yarn executable was not detected in the system.'
+  warn 'Download Yarn at https://yarnpkg.com/en/docs/install'
+  exit 1
 end
diff --git a/config/environments/production.rb b/config/environments/production.rb
index cfe4e80..1791372 100644
--- a/config/environments/production.rb
+++ b/config/environments/production.rb
@@ -51,7 +51,7 @@
   config.log_level = :debug
 
   # Prepend all log lines with the following tags.
-  config.log_tags = [ :request_id ]
+  config.log_tags = [:request_id]
 
   # Use a different cache store in production.
   # config.cache_store = :mem_cache_store
@@ -80,7 +80,7 @@
   # require 'syslog/logger'
   # config.logger = ActiveSupport::TaggedLogging.new(Syslog::Logger.new 'app-name')
 
-  if ENV["RAILS_LOG_TO_STDOUT"].present?
+  if ENV['RAILS_LOG_TO_STDOUT'].present?
     logger           = ActiveSupport::Logger.new(STDOUT)
     logger.formatter = config.log_formatter
     config.logger    = ActiveSupport::TaggedLogging.new(logger)
diff --git a/config/puma.rb b/config/puma.rb
index 5ed4437..fd02934 100644
--- a/config/puma.rb
+++ b/config/puma.rb
@@ -4,20 +4,20 @@
 # the maximum value specified for Puma. Default is set to 5 threads for minimum
 # and maximum; this matches the default thread size of Active Record.
 #
-max_threads_count = ENV.fetch("RAILS_MAX_THREADS") { 5 }
-min_threads_count = ENV.fetch("RAILS_MIN_THREADS") { max_threads_count }
+max_threads_count = ENV.fetch('RAILS_MAX_THREADS') { 5 }
+min_threads_count = ENV.fetch('RAILS_MIN_THREADS') { max_threads_count }
 threads min_threads_count, max_threads_count
 
 # Specifies the `port` that Puma will listen on to receive requests; default is 3000.
 #
-port        ENV.fetch("PORT") { 3000 }
+port        ENV.fetch('PORT') { 3000 }
 
 # Specifies the `environment` that Puma will run in.
 #
-environment ENV.fetch("RAILS_ENV") { "development" }
+environment ENV.fetch('RAILS_ENV') { 'development' }
 
 # Specifies the `pidfile` that Puma will use.
-pidfile ENV.fetch("PIDFILE") { "tmp/pids/server.pid" }
+pidfile ENV.fetch('PIDFILE') { 'tmp/pids/server.pid' }
 
 # Specifies the number of `workers` to boot in clustered mode.
 # Workers are forked web server processes. If using threads and workers together
diff --git a/db/migrate/20200930201016_create_users.rb b/db/migrate/20200930201016_create_users.rb
new file mode 100644
index 0000000..6eabb49
--- /dev/null
+++ b/db/migrate/20200930201016_create_users.rb
@@ -0,0 +1,14 @@
+class CreateUsers < ActiveRecord::Migration[6.0]
+  def change
+    create_table :users do |t|
+      t.string :first_name
+      t.string :last_name
+      t.string :password_digest
+      t.string :email
+      t.string :avatar
+      t.string :type
+
+      t.timestamps
+    end
+  end
+end
diff --git a/db/migrate/20201004112023_create_tasks.rb b/db/migrate/20201004112023_create_tasks.rb
new file mode 100644
index 0000000..481fc73
--- /dev/null
+++ b/db/migrate/20201004112023_create_tasks.rb
@@ -0,0 +1,14 @@
+class CreateTasks < ActiveRecord::Migration[6.0]
+  def change
+    create_table :tasks do |t|
+      t.string :name
+      t.text :description
+      t.integer :author_id
+      t.integer :assignee_id
+      t.string :state
+      t.date :expired_at
+
+      t.timestamps
+    end
+  end
+end
diff --git a/db/schema.rb b/db/schema.rb
index b10373b..032a4ac 100644
--- a/db/schema.rb
+++ b/db/schema.rb
@@ -10,9 +10,31 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 0) do
+ActiveRecord::Schema.define(version: 2020_10_04_112023) do
 
   # These are extensions that must be enabled in order to support this database
   enable_extension "plpgsql"
 
+  create_table "tasks", force: :cascade do |t|
+    t.string "name"
+    t.text "description"
+    t.integer "author_id"
+    t.integer "assignee_id"
+    t.string "state"
+    t.date "expired_at"
+    t.datetime "created_at", precision: 6, null: false
+    t.datetime "updated_at", precision: 6, null: false
+  end
+
+  create_table "users", force: :cascade do |t|
+    t.string "first_name"
+    t.string "last_name"
+    t.string "password_digest"
+    t.string "email"
+    t.string "avatar"
+    t.string "type"
+    t.datetime "created_at", precision: 6, null: false
+    t.datetime "updated_at", precision: 6, null: false
+  end
+
 end
diff --git a/test/.rubocop.yml b/test/.rubocop.yml
new file mode 100644
index 0000000..256b6a9
--- /dev/null
+++ b/test/.rubocop.yml
@@ -0,0 +1,567 @@
+AllCops:
+  Exclude:
+    - db/**/*
+    - config/**/*
+    - node_modules/**/*
+    - bin/*
+    - vendor/**/*
+
+Bundler/OrderedGems:
+  Enabled: false
+
+Naming/AccessorMethodName:
+  Description: Check the naming of accessor methods for get_/set_.
+  Enabled: false
+
+Style/Alias:
+  Description: 'Use alias_method instead of alias.'
+  StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#alias-method'
+  Enabled: false
+
+Style/ArrayJoin:
+  Description: 'Use Array#join instead of Array#*.'
+  StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#array-join'
+  Enabled: false
+
+Style/AsciiComments:
+  Description: 'Use only ascii symbols in comments.'
+  StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#english-comments'
+  Enabled: false
+
+Naming/AsciiIdentifiers:
+  Description: 'Use only ascii symbols in identifiers.'
+  StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#english-identifiers'
+  Enabled: false
+
+Style/Attr:
+  Description: 'Checks for uses of Module#attr.'
+  StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#attr'
+  Enabled: false
+
+Metrics/BlockNesting:
+  Description: 'Avoid excessive block nesting'
+  StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#three-is-the-number-thou-shalt-count'
+  Enabled: false
+
+Style/CaseEquality:
+  Description: 'Avoid explicit use of the case equality operator(===).'
+  StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#no-case-equality'
+  Enabled: false
+
+Style/CharacterLiteral:
+  Description: 'Checks for uses of character literals.'
+  StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#no-character-literals'
+  Enabled: false
+
+Style/ClassAndModuleChildren:
+  Description: 'Checks style of children classes and modules.'
+  Enabled: false
+
+Metrics/ClassLength:
+  Description: 'Avoid classes longer than 100 lines of code.'
+  Enabled: false
+
+Metrics/ModuleLength:
+  Description: 'Avoid modules longer than 100 lines of code.'
+  Enabled: false
+
+Style/ClassVars:
+  Description: 'Avoid the use of class variables.'
+  StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#no-class-vars'
+  Enabled: false
+
+Style/CollectionMethods:
+  Enabled: true
+  PreferredMethods:
+    find: detect
+    inject: reduce
+    collect: map
+    find_all: select
+
+Style/ColonMethodCall:
+  Description: 'Do not use :: for method call.'
+  StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#double-colons'
+  Enabled: false
+
+Style/CommentAnnotation:
+  Description: >-
+                 Checks formatting of special comments
+                 (TODO, FIXME, OPTIMIZE, HACK, REVIEW).
+  StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#annotate-keywords'
+  Enabled: false
+
+Metrics/AbcSize:
+  Description: >-
+                 A calculated magnitude based on number of assignments,
+                 branches, and conditions.
+  Enabled: false
+
+Metrics/BlockLength:
+  CountComments: true  # count full line comments?
+  Max: 40
+  ExcludedMethods: [elastic_query_parameters, parameters]
+  Exclude:
+    - "spec/**/*"
+    - "db/migrate/*"
+    - "test/factories/*"
+    - "lib/tasks/import/legacy_data.rake"
+    - "lib/tasks/import.rake"
+
+Metrics/CyclomaticComplexity:
+  Description: >-
+                 A complexity metric that is strongly correlated to the number
+                 of test cases needed to validate a method.
+  Enabled: false
+
+Style/PreferredHashMethods:
+  Description: 'Checks use of `has_key?` and `has_value?` Hash methods.'
+  StyleGuide: '#hash-key'
+  Enabled: false
+
+Style/Documentation:
+  Description: 'Document classes and non-namespace modules.'
+  Enabled: false
+
+Style/DoubleNegation:
+  Description: 'Checks for uses of double negation (!!).'
+  StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#no-bang-bang'
+  Enabled: false
+
+Style/EachWithObject:
+  Description: 'Prefer `each_with_object` over `inject` or `reduce`.'
+  Enabled: false
+
+Style/EmptyLiteral:
+  Description: 'Prefer literals to Array.new/Hash.new/String.new.'
+  StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#literal-array-hash'
+  Enabled: false
+
+# Checks whether the source file has a utf-8 encoding comment or not
+# AutoCorrectEncodingComment must match the regex
+# /#.*coding\s?[:=]\s?(?:UTF|utf)-8/
+Style/Encoding:
+  Enabled: false
+
+Style/EvenOdd:
+  Description: 'Favor the use of Fixnum#even? && Fixnum#odd?'
+  StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#predicate-methods'
+  Enabled: false
+
+Naming/FileName:
+  Description: 'Use snake_case for source file names.'
+  StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#snake-case-files'
+  Enabled: false
+
+Style/FrozenStringLiteralComment:
+  Description: >-
+    Add the frozen_string_literal comment to the top of files
+    to help transition from Ruby 2.3.0 to Ruby 3.0.
+  Enabled: false
+
+Lint/FlipFlop:
+  Description: 'Checks for flip flops'
+  StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#no-flip-flops'
+  Enabled: false
+
+Style/FormatString:
+  Description: 'Enforce the use of Kernel#sprintf, Kernel#format or String#%.'
+  StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#sprintf'
+  Enabled: false
+
+Style/GlobalVars:
+  Description: 'Do not introduce global variables.'
+  StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#instance-vars'
+  Reference: 'http://www.zenspider.com/Languages/Ruby/QuickRef.html'
+  Enabled: false
+
+Style/GuardClause:
+  Description: 'Check for conditionals that can be replaced with guard clauses'
+  StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#no-nested-conditionals'
+  Enabled: false
+
+Style/IfUnlessModifier:
+  Description: >-
+                 Favor modifier if/unless usage when you have a
+                 single-line body.
+  StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#if-as-a-modifier'
+  Enabled: false
+
+Style/IfWithSemicolon:
+  Description: 'Do not use if x; .... Use the ternary operator instead.'
+  StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#no-semicolon-ifs'
+  Enabled: false
+
+Style/InlineComment:
+  Description: 'Avoid inline comments.'
+  Enabled: false
+
+Style/Lambda:
+  Description: 'Use the new lambda literal syntax for single-line blocks.'
+  StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#lambda-multi-line'
+  Enabled: false
+
+Style/LambdaCall:
+  Description: 'Use lambda.call(...) instead of lambda.(...).'
+  StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#proc-call'
+  Enabled: false
+
+Style/LineEndConcatenation:
+  Description: >-
+                 Use \ instead of + or << to concatenate two string literals at
+                 line end.
+  Enabled: false
+
+Layout/LineLength:
+  Description: 'Limit lines to 80 characters.'
+  StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#80-character-limits'
+  Max: 140
+
+Metrics/MethodLength:
+  Description: 'Avoid methods longer than 10 lines of code.'
+  StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#short-methods'
+  Enabled: false
+
+Style/ModuleFunction:
+  Description: 'Checks for usage of `extend self` in modules.'
+  StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#module-function'
+  Enabled: false
+
+Style/MultilineBlockChain:
+  Description: 'Avoid multi-line chains of blocks.'
+  StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#single-line-blocks'
+  Enabled: false
+
+Style/NegatedIf:
+  Description: >-
+                 Favor unless over if for negative conditions
+                 (or control flow or).
+  StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#unless-for-negatives'
+  Enabled: false
+
+Style/NegatedWhile:
+  Description: 'Favor until over while for negative conditions.'
+  StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#until-for-negatives'
+  Enabled: false
+
+Style/Next:
+  Description: 'Use `next` to skip iteration instead of a condition at the end.'
+  StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#no-nested-conditionals'
+  Enabled: false
+
+Style/NilComparison:
+  Description: 'Prefer x.nil? to x == nil.'
+  StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#predicate-methods'
+  Enabled: false
+
+Style/Not:
+  Description: 'Use ! instead of not.'
+  StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#bang-not-not'
+  Enabled: false
+
+Style/NumericLiterals:
+  Description: >-
+                 Add underscores to large numeric literals to improve their
+                 readability.
+  StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#underscores-in-numerics'
+  Enabled: false
+
+Style/OneLineConditional:
+  Description: >-
+                 Favor the ternary operator(?:) over
+                 if/then/else/end constructs.
+  StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#ternary-operator'
+  Enabled: false
+
+Naming/BinaryOperatorParameterName:
+  Description: 'When defining binary operators, name the argument other.'
+  StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#other-arg'
+  Enabled: false
+
+Metrics/ParameterLists:
+  Description: 'Avoid parameter lists longer than three or four parameters.'
+  StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#too-many-params'
+  Enabled: false
+
+Style/PercentLiteralDelimiters:
+  Description: 'Use `%`-literal delimiters consistently'
+  StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#percent-literal-braces'
+  Enabled: false
+
+Style/PerlBackrefs:
+  Description: 'Avoid Perl-style regex back references.'
+  StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#no-perl-regexp-last-matchers'
+  Enabled: false
+
+Naming/PredicateName:
+  Description: 'Check the names of predicate methods.'
+  StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#bool-methods-qmark'
+  ForbiddenPrefixes:
+    - is_
+  Exclude:
+    - spec/**/*
+
+Style/Proc:
+  Description: 'Use proc instead of Proc.new.'
+  StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#proc'
+  Enabled: false
+
+Style/RaiseArgs:
+  Description: 'Checks the arguments passed to raise/fail.'
+  StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#exception-class-messages'
+  Enabled: false
+
+Style/RegexpLiteral:
+  Description: 'Use / or %r around regular expressions.'
+  StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#percent-r'
+  Enabled: false
+
+Style/SelfAssignment:
+  Description: >-
+                 Checks for places where self-assignment shorthand should have
+                 been used.
+  StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#self-assignment'
+  Enabled: false
+
+Style/SingleLineBlockParams:
+  Description: 'Enforces the names of some block params.'
+  StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#reduce-blocks'
+  Enabled: false
+
+Style/SingleLineMethods:
+  Description: 'Avoid single-line methods.'
+  StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#no-single-line-methods'
+  Enabled: false
+
+Style/SignalException:
+  Description: 'Checks for proper usage of fail and raise.'
+  StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#fail-method'
+  Enabled: false
+
+Style/SpecialGlobalVars:
+  Description: 'Avoid Perl-style global variables.'
+  StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#no-cryptic-perlisms'
+  Enabled: false
+
+Style/StringLiterals:
+  Description: 'Checks if uses of quotes match the configured preference.'
+  StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#consistent-string-literals'
+  EnforcedStyle: single_quotes
+  Enabled: true
+
+Style/SymbolArray:
+  EnforcedStyle: brackets
+
+Style/TrailingCommaInArguments:
+  Description: 'Checks for trailing comma in argument lists.'
+  StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#no-trailing-array-commas'
+  EnforcedStyleForMultiline: comma
+  SupportedStylesForMultiline:
+    - comma
+    - consistent_comma
+    - no_comma
+  Enabled: true
+
+Style/TrailingCommaInArrayLiteral:
+  Description: 'Checks for trailing comma in array literals.'
+  StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#no-trailing-array-commas'
+  EnforcedStyleForMultiline: comma
+  SupportedStylesForMultiline:
+    - comma
+    - consistent_comma
+    - no_comma
+  Enabled: true
+
+Style/TrailingCommaInHashLiteral:
+  Description: 'Checks for trailing comma in hash literals.'
+  StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#no-trailing-array-commas'
+  EnforcedStyleForMultiline: comma
+  SupportedStylesForMultiline:
+    - comma
+    - consistent_comma
+    - no_comma
+  Enabled: true
+
+Style/TrivialAccessors:
+  Description: 'Prefer attr_* methods to trivial readers/writers.'
+  StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#attr_family'
+  Enabled: false
+
+Style/VariableInterpolation:
+  Description: >-
+                 Don't interpolate global, instance and class variables
+                 directly in strings.
+  StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#curlies-interpolate'
+  Enabled: false
+
+Style/WhenThen:
+  Description: 'Use when x then ... for one-line cases.'
+  StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#one-line-cases'
+  Enabled: false
+
+Style/WhileUntilModifier:
+  Description: >-
+                 Favor modifier while/until usage when you have a
+                 single-line body.
+  StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#while-as-a-modifier'
+  Enabled: false
+
+Style/WordArray:
+  Description: 'Use %w or %W for arrays of words.'
+  StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#percent-w'
+  EnforcedStyle: brackets
+
+Style/MethodCallWithArgsParentheses:
+  Description: 'Use parentheses for method calls with arguments.'
+  Enabled: true
+  IgnoredMethods:
+    - require
+    - require_relative
+    - raise
+  Exclude:
+    - Gemfile
+    - db/migrate/**/*
+    - config/**/
+    - config.ru
+
+# Layout
+
+Layout/ParameterAlignment:
+  Description: 'Here we check if the parameters on a multi-line method call or definition are aligned.'
+  StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#no-double-indent'
+  Enabled: false
+
+Layout/ConditionPosition:
+  Description: >-
+                 Checks for condition placed in a confusing position relative to
+                 the keyword.
+  StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#same-line-condition'
+  Enabled: false
+
+Layout/DotPosition:
+  Description: 'Checks the position of the dot in multi-line method calls.'
+  StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#consistent-multi-line-chains'
+  EnforcedStyle: trailing
+
+Layout/ExtraSpacing:
+  Description: 'Do not use unnecessary spacing.'
+  Enabled: true
+
+Layout/MultilineOperationIndentation:
+  Description: >-
+                 Checks indentation of binary operations that span more than
+                 one line.
+  Enabled: true
+  EnforcedStyle: indented
+
+Layout/MultilineMethodCallIndentation:
+  Description: >-
+                 Checks indentation of method calls with the dot operator
+                 that span more than one line.
+  Enabled: true
+  EnforcedStyle: indented
+
+Layout/InitialIndentation:
+  Description: >-
+    Checks the indentation of the first non-blank non-comment line in a file.
+  Enabled: false
+
+# Lint
+
+Lint/AmbiguousOperator:
+  Description: >-
+                 Checks for ambiguous operators in the first argument of a
+                 method invocation without parentheses.
+  StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#parens-as-args'
+  Enabled: false
+
+Lint/AmbiguousRegexpLiteral:
+  Description: >-
+                 Checks for ambiguous regexp literals in the first argument of
+                 a method invocation without parenthesis.
+  Enabled: false
+
+Lint/AssignmentInCondition:
+  Description: "Don't use assignment in conditions."
+  StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#safe-assignment-in-condition'
+  Enabled: false
+
+Lint/CircularArgumentReference:
+  Description: "Don't refer to the keyword argument in the default value."
+  Enabled: false
+
+Lint/DeprecatedClassMethods:
+  Description: 'Check for deprecated class method calls.'
+  Enabled: false
+
+Lint/DuplicateHashKey:
+  Description: 'Check for duplicate keys in hash literals.'
+  Enabled: false
+
+Lint/EachWithObjectArgument:
+  Description: 'Check for immutable argument given to each_with_object.'
+  Enabled: false
+
+Lint/ElseLayout:
+  Description: 'Check for odd code arrangement in an else block.'
+  Enabled: false
+
+Lint/FormatParameterMismatch:
+  Description: 'The number of parameters to format/sprint must match the fields.'
+  Enabled: false
+
+Lint/SuppressedException:
+  Description: "Don't suppress exception."
+  StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#dont-hide-exceptions'
+  Enabled: false
+
+Lint/LiteralAsCondition:
+  Description: 'Checks of literals used in conditions.'
+  Enabled: false
+
+Lint/LiteralInInterpolation:
+  Description: 'Checks for literals used in interpolation.'
+  Enabled: false
+
+Lint/Loop:
+  Description: >-
+                 Use Kernel#loop with break rather than begin/end/until or
+                 begin/end/while for post-loop tests.
+  StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#loop-with-break'
+  Enabled: false
+
+Lint/NestedMethodDefinition:
+  Description: 'Do not use nested method definitions.'
+  StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#no-nested-methods'
+  Enabled: false
+
+Lint/NonLocalExitFromIterator:
+  Description: 'Do not use return in iterator to cause non-local exit.'
+  Enabled: false
+
+Lint/ParenthesesAsGroupedExpression:
+  Description: >-
+                 Checks for method calls with a space before the opening
+                 parenthesis.
+  StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#parens-no-spaces'
+  Enabled: false
+
+Lint/RequireParentheses:
+  Description: >-
+                 Use parentheses in the method call to avoid confusion
+                 about precedence.
+  Enabled: false
+
+Lint/UnderscorePrefixedVariableName:
+  Description: 'Do not use prefix `_` for a variable that is used.'
+  Enabled: false
+
+Lint/RedundantCopDisableDirective:
+  Description: >-
+                 Checks for rubocop:disable comments that can be removed.
+                 Note: this cop is not disabled when disabling all cops.
+                 It must be explicitly disabled.
+  Enabled: false
+
+Lint/Void:
+  Description: 'Possible use of operator/literal/variable in void context.'
+  Enabled: false
diff --git a/test/application_system_test_case.rb b/test/application_system_test_case.rb
index d19212a..23701b4 100644
--- a/test/application_system_test_case.rb
+++ b/test/application_system_test_case.rb
@@ -1,4 +1,4 @@
-require "test_helper"
+require 'test_helper'
 
 class ApplicationSystemTestCase < ActionDispatch::SystemTestCase
   driven_by :selenium, using: :chrome, screen_size: [1400, 1400]
diff --git a/test/channels/application_cable/connection_test.rb b/test/channels/application_cable/connection_test.rb
index 800405f..d05dbd2 100644
--- a/test/channels/application_cable/connection_test.rb
+++ b/test/channels/application_cable/connection_test.rb
@@ -1,4 +1,4 @@
-require "test_helper"
+require 'test_helper'
 
 class ApplicationCable::ConnectionTest < ActionCable::Connection::TestCase
   # test "connects with cookies" do
diff --git a/test/factories/sequence.rb b/test/factories/sequence.rb
new file mode 100644
index 0000000..06d12d5
--- /dev/null
+++ b/test/factories/sequence.rb
@@ -0,0 +1,37 @@
+FactoryBot.define do
+  sequence :first_name do |n|
+    "first_name#{n}"
+  end
+
+  sequence :last_name do |n|
+    "last_name#{n}"
+  end
+
+  sequence :password do |n|
+    "secret_password#{n}"
+  end
+
+  sequence :email do |n|
+    "person#{n}@example.com"
+  end
+
+  sequence :avatar do |n|
+    "avatar#{n}"
+  end
+
+  sequence :name do |n|
+    "name#{n}"
+  end
+
+  sequence :description do |n|
+    "description#{n}"
+  end
+
+  sequence :state do |n|
+    "state#{n}"
+  end
+
+  sequence :expired_at do |n|
+    "expired_at 2020-04-#{n}"
+  end
+end
diff --git a/test/factories/tasks.rb b/test/factories/tasks.rb
new file mode 100644
index 0000000..62ed71a
--- /dev/null
+++ b/test/factories/tasks.rb
@@ -0,0 +1,10 @@
+FactoryBot.define do
+  factory :task do
+    name
+    description
+    author_id { 1 }
+    assignee_id { 1 }
+    state
+    expired_at
+  end
+end
diff --git a/test/factories/users.rb b/test/factories/users.rb
new file mode 100644
index 0000000..081ba54
--- /dev/null
+++ b/test/factories/users.rb
@@ -0,0 +1,22 @@
+FactoryBot.define do
+  factory :user do
+    first_name
+    last_name
+    password
+    email
+    avatar
+    type { '' }
+  end
+
+  factory :developer, parent: :user do
+    type { 'Developer' }
+  end
+
+  factory :admin, parent: :user do
+    type { 'Admin' }
+  end
+
+  factory :manager, parent: :user do
+    type { 'Manager' }
+  end
+end
\ No newline at end of file
diff --git a/test/models/admin_test.rb b/test/models/admin_test.rb
new file mode 100644
index 0000000..3514ca9
--- /dev/null
+++ b/test/models/admin_test.rb
@@ -0,0 +1,8 @@
+require 'test_helper'
+
+class AdminTest < ActiveSupport::TestCase
+  test 'create' do
+    admin = create(:admin)
+    assert admin.persisted?
+  end
+end
diff --git a/test/models/developer_test.rb b/test/models/developer_test.rb
new file mode 100644
index 0000000..161274e
--- /dev/null
+++ b/test/models/developer_test.rb
@@ -0,0 +1,8 @@
+require 'test_helper'
+
+class DeveloperTest < ActiveSupport::TestCase
+  test 'create' do
+    developer = create(:developer)
+    assert developer.persisted?
+  end
+end
diff --git a/test/models/manager_test.rb b/test/models/manager_test.rb
new file mode 100644
index 0000000..77984d3
--- /dev/null
+++ b/test/models/manager_test.rb
@@ -0,0 +1,8 @@
+require 'test_helper'
+
+class ManagerTest < ActiveSupport::TestCase
+  test 'create' do
+    manager = create(:manager)
+    assert manager.persisted?
+  end
+end
diff --git a/test/models/task_test.rb b/test/models/task_test.rb
new file mode 100644
index 0000000..f82b701
--- /dev/null
+++ b/test/models/task_test.rb
@@ -0,0 +1,8 @@
+require 'test_helper'
+
+class TaskTest < ActiveSupport::TestCase
+  test 'create' do
+    task = create(:task)
+    assert task.persisted?
+  end
+end
diff --git a/test/models/user_test.rb b/test/models/user_test.rb
new file mode 100644
index 0000000..44011e0
--- /dev/null
+++ b/test/models/user_test.rb
@@ -0,0 +1,8 @@
+require 'test_helper'
+
+class UserTest < ActiveSupport::TestCase
+  test 'create' do
+    user = create(:user)
+    assert user.persisted?
+  end
+end
diff --git a/test/test_helper.rb b/test/test_helper.rb
index d5300f8..b67648c 100644
--- a/test/test_helper.rb
+++ b/test/test_helper.rb
@@ -3,6 +3,7 @@
 require 'rails/test_help'
 
 class ActiveSupport::TestCase
+  include FactoryBot::Syntax::Methods
   # Run tests in parallel with specified workers
   parallelize(workers: :number_of_processors)