Updated to latest rubocop version.

.rubocop.yml

@@ -1,7 +1,10 @@
 # Default enabled cops
 # https://github.com/bbatsov/rubocop/blob/master/config/enabled.yml
 
+inherit_from: .rubocop_todo.yml
+
 AllCops:
+  DisplayCopNames: true
   Exclude:
     - 'bin/rails'
     - 'bin/rake'
@@ -35,9 +38,13 @@ Style/IfUnlessModifier:
   StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#if-as-a-modifier'
   Enabled: false
 
-Style/TrailingCommaInLiteral:
-  Description: 'Checks for trailing comma in array and hash literals.'
-  StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#no-trailing-array-commas'
+Style/TrailingCommaInArrayLiteral:
+  Description: 'Checks for trailing comma in array literals.'
+  StyleGuide: '#no-trailing-array-commas'
+  Enabled: false
+
+Style/TrailingCommaInHashLiteral:
+  Description: 'Checks for trailing comma in hash literals.'
   Enabled: false
 
 Style/TrailingCommaInArguments:
@@ -67,9 +74,12 @@ Style/MethodCallWithoutArgsParentheses:
   StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#no-args-no-parens'
   Enabled: false
 
-Layout/SpaceInsideBrackets:
-  Description: 'No spaces after [ or before ].'
-  StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#no-spaces-braces'
+Layout/SpaceInsideReferenceBrackets:
+  Description: 'Checks the spacing inside referential brackets.'
+  Enabled: false
+
+Layout/SpaceInsideArrayLiteralBrackets:
+  Description: 'Checks the spacing inside array literal brackets.'
   Enabled: false
 
 Style/DefWithParentheses:
@@ -167,68 +177,31 @@ Naming/VariableNumber:
   Description: 'Use the configured style when numbering variables.'
   Enabled: false
 
-# 2.0
-
-Metrics/PerceivedComplexity:
+Naming/UncommunicativeMethodParamName:
   Description: >-
-                 A complexity metric geared towards measuring complexity for a
-                 human reader.
-  Enabled: false
+                Checks for method parameter names that contain capital letters,
+                end in numbers, or do not meet a minimal length.
+  Enabled: true
+  AllowedNames: e, id, _, ip
 
-Metrics/AbcSize:
-  Description: >-
-                 A calculated magnitude based on number of assignments,
-                 branches, and conditions.
-  Enabled: false
+Lint/BooleanSymbol:
+  Description: 'Check for `:true` and `:false` symbols.'
+  Enabled: true
+  Exclude:
+    - "db/seeds/object_manager_attributes.rb"
+    - "test/integration/object_manager_attributes_controller_test.rb"
+    - "test/integration/object_manager_test.rb"
 
-Metrics/CyclomaticComplexity:
-  Description: >-
-                 A complexity metric that is strongly correlated to the number
-                 of test cases needed to validate a method.
-  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
-
-Metrics/ModuleLength:
-  Description: 'Avoid modules longer than 100 lines of code.'
-  Enabled: false
-
-Metrics/BlockLength:
-  Enabled: false
-
-Lint/RescueWithoutErrorClass:
-  Enabled: false
-
-Rails/ApplicationRecord:
-  Enabled: false
-
-# TODO
-
-Rails/HasManyOrHasOneDependent:
-  Enabled: false
-
-Style/DateTime:
-  Enabled: false
-
-Style/Documentation:
-  Description: 'Document classes and non-namespace modules.'
-  Enabled: false
-
-Lint/UselessAssignment:
-  Enabled: false
-
-Layout/ExtraSpacing:
-  Description: 'Do not use unnecessary spacing.'
-  Enabled: false
-
-# Broken!!!! Generates broken code since "String".downcase == "strinG".downcase is not equals "String".casecmp("strinG") but "String".casecmp("strinG") == 0 !!!
-Performance/Casecmp:
-  Description: 'Use `casecmp` rather than `downcase ==`.'
-  Reference: 'https://github.com/JuanitoFatas/fast-ruby#stringcasecmp-vs-stringdowncase---code'
-  Enabled: false
+Lint/InterpolationCheck:
+  Description: 'Raise warning for interpolation in single q strs'
+  Enabled: true
+  Exclude:
+    - "test/unit/email_process_auto_response_test.rb"
+    - "test/unit/email_process_bounce_delivery_permanent_failed_test.rb"
+    - "test/unit/email_process_bounce_follow_test.rb"
+    - "test/unit/notification_factory_renderer_test.rb"
+    - "test/unit/notification_factory_template_test.rb"
+    - "test/unit/ticket_trigger_test.rb"
 
 # RSpec tests
 Style/NumericPredicate:

.rubocop_todo.yml

@@ -0,0 +1,80 @@
+# 10.0
+
+Metrics/PerceivedComplexity:
+  Description: >-
+                 A complexity metric geared towards measuring complexity for a
+                 human reader.
+  Enabled: false
+
+Metrics/AbcSize:
+  Description: >-
+                 A calculated magnitude based on number of assignments,
+                 branches, and conditions.
+  Enabled: false
+
+Metrics/CyclomaticComplexity:
+  Description: >-
+                 A complexity metric that is strongly correlated to the number
+                 of test cases needed to validate a method.
+  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
+
+Metrics/ModuleLength:
+  Description: 'Avoid modules longer than 100 lines of code.'
+  Enabled: false
+
+Metrics/BlockLength:
+  Enabled: false
+
+Style/RescueStandardError:
+  Description: 'Avoid rescuing without specifying an error class.'
+  Enabled: false
+
+# TODO
+
+Rails/ApplicationRecord:
+  Description: 'Check that models subclass ApplicationRecord.'
+  Enabled: false
+
+Rails/CreateTableWithTimestamps:
+  Description: >-
+                  Checks the migration for which timestamps are not included
+                  when creating a new table.
+  Enabled: false
+
+Rails/HasManyOrHasOneDependent:
+  Description: 'Define the dependent option to the has_many and has_one associations.'
+  StyleGuide: 'https://github.com/bbatsov/rails-style-guide#has_many-has_one-dependent-option'
+  Enabled: false
+
+Style/DateTime:
+  Description: 'Use Date or Time over DateTime.'
+  StyleGuide: '#date--time'
+  Enabled: false
+
+Style/Documentation:
+  Description: 'Document classes and non-namespace modules.'
+  Enabled: false
+
+Lint/UselessAssignment:
+  Enabled: false
+
+Layout/ExtraSpacing:
+  Description: 'Do not use unnecessary spacing.'
+  Enabled: false
+
+# Broken!!!! Generates broken code since "String".downcase == "strinG".downcase is not equals "String".casecmp("strinG") but "String".casecmp("strinG") == 0 !!!
+Performance/Casecmp:
+  Description: 'Use `casecmp` rather than `downcase ==`.'
+  Reference: 'https://github.com/JuanitoFatas/fast-ruby#stringcasecmp-vs-stringdowncase---code'
+  Enabled: false
+
+# Can be removed after introduction of Sequencer for OTRS migration
+Lint/MissingCopEnableDirective:
+  Enabled: true
+  Exclude:
+    - "lib/import/**/*"

Gemfile.lock

@@ -68,7 +68,7 @@ GEM
     argon2 (1.1.4)
       ffi (~> 1.9)
       ffi-compiler (~> 0.1)
-    ast (2.3.0)
+    ast (2.4.0)
     autoprefixer-rails (7.1.6)
       execjs
     biz (1.7.0)
@@ -284,9 +284,9 @@ GEM
     omniauth-weibo-oauth2 (0.4.5)
       omniauth (~> 1.5)
       omniauth-oauth2 (>= 1.4.0)
-    parallel (1.12.0)
-    parser (2.4.0.2)
-      ast (~> 2.3)
+    parallel (1.12.1)
+    parser (2.5.0.5)
+      ast (~> 2.4.0)
     pg (0.21.0)
     pluginator (1.5.0)
     power_assert (1.1.1)
@@ -328,8 +328,7 @@ GEM
       method_source
       rake (>= 0.8.7)
       thor (>= 0.18.1, < 2.0)
-    rainbow (2.2.2)
-      rake
+    rainbow (3.0.0)
     raindrops (0.19.0)
     rake (12.3.1)
     rb-fsevent (0.10.2)
@@ -358,11 +357,11 @@ GEM
       rspec-mocks (~> 3.7.0)
       rspec-support (~> 3.7.0)
     rspec-support (3.7.0)
-    rubocop (0.51.0)
+    rubocop (0.54.0)
       parallel (~> 1.10)
-      parser (>= 2.3.3.1, < 3.0)
+      parser (>= 2.5)
       powerpack (~> 0.1)
-      rainbow (>= 2.2.2, < 3.0)
+      rainbow (>= 2.2.2, < 4.0)
       ruby-progressbar (~> 1.7)
       unicode-display_width (~> 1.0, >= 1.0.1)
     ruby-progressbar (1.9.0)

Rakefile

@@ -2,6 +2,6 @@
 # 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.
 
-require File.expand_path('../config/application', __FILE__)
+require File.expand_path('config/application', __dir__)
 
 Zammad::Application.load_tasks

app/controllers/external_credentials_controller.rb

@@ -26,7 +26,6 @@ class ExternalCredentialsController < ApplicationController
   def app_verify
     attributes = ExternalCredential.app_verify(params)
     render json: { attributes: attributes }, status: :ok
-    return
   rescue => e
     render json: { error: e.message }, status: :ok
   end

app/models/activity_stream.rb

@@ -5,8 +5,16 @@ class ActivityStream < ApplicationModel
   include ActivityStream::Assets
 
   self.table_name = 'activity_streams'
+
+  # rubocop:disable Rails/InverseOf
   belongs_to :object, class_name: 'ObjectLookup', foreign_key: 'activity_stream_object_id'
   belongs_to :type,   class_name: 'TypeLookup',   foreign_key: 'activity_stream_type_id'
+  # rubocop:enable Rails/InverseOf
+
+  # the noop is needed since Layout/EmptyLines detects
+  # the block commend below wrongly as the measurement of
+  # the wanted indentation of the rubocop re-enabling above
+  def noop; end
 
 =begin
 

app/models/application_model/has_cache.rb

@@ -11,9 +11,9 @@ module ApplicationModel::HasCache
     after_destroy :cache_delete
   end
 
-  def cache_update(o)
+  def cache_update(other)
     cache_delete if respond_to?('cache_delete')
-    o.cache_delete if o.respond_to?('cache_delete')
+    other.cache_delete if other.respond_to?('cache_delete')
     true
   end
 

app/models/avatar.rb

@@ -1,7 +1,7 @@
 # Copyright (C) 2012-2016 Zammad Foundation, http://zammad-foundation.org/
 
 class Avatar < ApplicationModel
-  belongs_to :object_lookup,   class_name: 'ObjectLookup'
+  belongs_to :object_lookup
 
 =begin
 

app/models/channel.rb

@@ -4,7 +4,7 @@ class Channel < ApplicationModel
   load 'channel/assets.rb'
   include Channel::Assets
 
-  belongs_to :group,  class_name: 'Group'
+  belongs_to :group
 
   store :options
   store :preferences

app/models/chat/session.rb

@@ -8,9 +8,12 @@ class Chat::Session < ApplicationModel
   load 'chat/session/assets.rb'
   include Chat::Session::Assets
 
+  # rubocop:disable Rails/InverseOf
   has_many :messages, class_name: 'Chat::Message', foreign_key: 'chat_session_id'
+  # rubocop:enable Rails/InverseOf
 
   before_create :generate_session_id
+
   store :preferences
 
   def generate_session_id

app/models/concerns/can_csv_import.rb

@@ -173,7 +173,7 @@ returns
 
               record.with_lock do
                 record.associations_from_param(attributes)
-                record.update_attributes!(clean_params)
+                record.update!(clean_params)
               end
             rescue => e
               errors.push "Line #{line_count}: #{e.message}"

app/models/history.rb

@@ -5,9 +5,17 @@ class History < ApplicationModel
   include History::Assets
 
   self.table_name = 'histories'
+
+  # rubocop:disable Rails/InverseOf
   belongs_to :history_type,      class_name: 'History::Type'
   belongs_to :history_object,    class_name: 'History::Object'
   belongs_to :history_attribute, class_name: 'History::Attribute'
+  # rubocop:enable Rails/InverseOf
+
+  # the noop is needed since Layout/EmptyLines detects
+  # the block commend below wrongly as the measurement of
+  # the wanted indentation of the rubocop re-enabling above
+  def noop; end
 
 =begin
 

app/models/karma/activity_log.rb

@@ -1,7 +1,7 @@
 # Copyright (C) 2012-2016 Zammad Foundation, http://zammad-foundation.org/
 
 class Karma::ActivityLog < ApplicationModel
-  belongs_to :object_lookup,   class_name: 'ObjectLookup'
+  belongs_to :object_lookup
 
   self.table_name = 'karma_activity_logs'
 

app/models/link.rb

@@ -1,8 +1,11 @@
 # Copyright (C) 2012-2016 Zammad Foundation, http://zammad-foundation.org/
 
 class Link < ApplicationModel
+
+  # rubocop:disable Rails/InverseOf
   belongs_to :link_type,   class_name: 'Link::Type'
   belongs_to :link_object, class_name: 'Link::Object'
+  # rubocop:enable Rails/InverseOf
 
   after_destroy :touch_link_references
 

app/models/object_manager/attribute.rb

@@ -4,8 +4,10 @@ class ObjectManager::Attribute < ApplicationModel
 
   self.table_name = 'object_manager_attributes'
 
-  belongs_to :object_lookup,   class_name: 'ObjectLookup'
+  belongs_to :object_lookup
+
   validates :name, presence: true
+
   store :screens
   store :data_option
   store :data_option_new

app/models/online_notification.rb

@@ -4,9 +4,11 @@ class OnlineNotification < ApplicationModel
   load 'online_notification/assets.rb'
   include OnlineNotification::Assets
 
-  belongs_to :type,     class_name: 'TypeLookup', foreign_key: 'type_lookup_id'
-  belongs_to :object,   class_name: 'ObjectLookup', foreign_key: 'object_lookup_id'
   belongs_to :user
+  # rubocop:disable Rails/InverseOf
+  belongs_to :object, class_name: 'ObjectLookup', foreign_key: 'object_lookup_id'
+  belongs_to :type,   class_name: 'TypeLookup',   foreign_key: 'type_lookup_id'
+  # rubocop:enable Rails/InverseOf
 
   after_create    :notify_clients_after_change
   after_update    :notify_clients_after_change

app/models/organization.rb

@@ -15,12 +15,15 @@ class Organization < ApplicationModel
   load 'organization/search_index.rb'
   include Organization::SearchIndex
 
+  # rubocop:disable Rails/InverseOf
   has_many :members, class_name: 'User'
-  validates               :name,     presence: true
+  # rubocop:enable Rails/InverseOf
 
   before_create :domain_cleanup
   before_update :domain_cleanup
 
+  validates :name, presence: true
+
   activity_stream_permission 'admin.role'
 
   private

app/models/overview.rb

@@ -77,7 +77,7 @@ class Overview < ApplicationModel
     while check
       count += 1
       exists = Overview.find_by(link: local_lookup_link)
-      if exists && exists.id != id # rubocop:disable Style/SafeNavigation
+      if exists && exists.id != id
         local_lookup_link = "#{local_link}_#{count}"
       else
         check = false

app/models/recent_view.rb

@@ -4,7 +4,10 @@ class RecentView < ApplicationModel
   load 'recent_view/assets.rb'
   include RecentView::Assets
 
+  # rubocop:disable Rails/InverseOf
+  belongs_to :ticket, foreign_key: 'o_id'
   belongs_to :object, class_name: 'ObjectLookup', foreign_key: 'recent_view_object_id'
+  # rubocop:enable Rails/InverseOf
 
   after_create  :notify_clients
   after_update  :notify_clients

app/models/scheduler.rb

@@ -311,7 +311,7 @@ class Scheduler < ApplicationModel
           sleep wait
           logger.debug { '*** worker thread loop' }
         else
-          format "*** #{count} jobs processed at %.4f j/s, %d failed ...\n", count / realtime, result.last
+          format "*** #{count} jobs processed at %<jps>.4f j/s, %<failed>d failed ...\n", jps: count / realtime, failed: result.last
         end
       end
 

app/models/setting.rb

@@ -163,7 +163,7 @@ reload config settings
   # convert state into hash to be able to store it as store
   def state_check
     return true if !state
-    return true if state && state.respond_to?('has_key?') && state.key?(:value)
+    return true if state.try(:key?, :value)
     self.state_current = { value: state }
     true
   end

app/models/store.rb

@@ -4,11 +4,15 @@ class Store < ApplicationModel
   load 'store/object.rb'
   load 'store/file.rb'
 
-  store       :preferences
+  # rubocop:disable Rails/InverseOf
   belongs_to :store_object, class_name: 'Store::Object'
   belongs_to :store_file,   class_name: 'Store::File'
+  # rubocop:enable Rails/InverseOf
+
   validates :filename, presence: true
 
+  store :preferences
+
 =begin
 
 add an attachment to storage

app/models/tag.rb

@@ -1,8 +1,16 @@
 # Copyright (C) 2012-2016 Zammad Foundation, http://zammad-foundation.org/
 
 class Tag < ApplicationModel
+
+  # rubocop:disable Rails/InverseOf
   belongs_to :tag_object, class_name: 'Tag::Object'
   belongs_to :tag_item,   class_name: 'Tag::Item'
+  # rubocop:enable Rails/InverseOf
+
+  # the noop is needed since Layout/EmptyLines detects
+  # the block commend below wrongly as the measurement of
+  # the wanted indentation of the rubocop re-enabling above
+  def noop; end
 
 =begin
 

app/models/ticket.rb

@@ -55,10 +55,12 @@ class Ticket < ApplicationModel
                              :article_count,
                              :preferences
 
-  belongs_to    :group,                  class_name: 'Group'
-  has_many      :articles,               class_name: 'Ticket::Article', after_add: :cache_update, after_remove: :cache_update, dependent: :destroy
-  has_many      :ticket_time_accounting, class_name: 'Ticket::TimeAccounting', dependent: :destroy
-  belongs_to    :organization,           class_name: 'Organization'
+  belongs_to    :group
+  belongs_to    :organization
+  has_many      :articles,               class_name: 'Ticket::Article', after_add: :cache_update, after_remove: :cache_update, dependent: :destroy, inverse_of: :ticket
+  has_many      :ticket_time_accounting, class_name: 'Ticket::TimeAccounting', dependent: :destroy, inverse_of: :ticket
+
+  # rubocop:disable Rails/InverseOf
   belongs_to    :state,                 class_name: 'Ticket::State'
   belongs_to    :priority,              class_name: 'Ticket::Priority'
   belongs_to    :owner,                 class_name: 'User'
@@ -67,6 +69,7 @@ class Ticket < ApplicationModel
   belongs_to    :updated_by,            class_name: 'User'
   belongs_to    :create_article_type,   class_name: 'Ticket::Article::Type'
   belongs_to    :create_article_sender, class_name: 'Ticket::Article::Sender'
+  # rubocop:enable Rails/InverseOf
 
   self.inheritance_column = nil
 

app/models/ticket/article.rb

@@ -11,17 +11,22 @@ class Ticket::Article < ApplicationModel
   include Ticket::Article::Assets
 
   belongs_to :ticket
-  has_one       :ticket_time_accounting, class_name: 'Ticket::TimeAccounting', foreign_key: :ticket_article_id, dependent: :destroy
+  has_one    :ticket_time_accounting, class_name: 'Ticket::TimeAccounting', foreign_key: :ticket_article_id, dependent: :destroy, inverse_of: :ticket_article
+
+  # rubocop:disable Rails/InverseOf
   belongs_to :type,       class_name: 'Ticket::Article::Type'
   belongs_to :sender,     class_name: 'Ticket::Article::Sender'
   belongs_to :created_by, class_name: 'User'
   belongs_to :updated_by, class_name: 'User'
   belongs_to :origin_by,  class_name: 'User'
-  store         :preferences
+  # rubocop:enable Rails/InverseOf
+
   before_create :check_subject, :check_body, :check_message_id_md5
   before_update :check_subject, :check_body, :check_message_id_md5
   after_destroy :store_delete
 
+  store :preferences
+
   sanitized_html :body
 
   activity_stream_permission 'ticket.agent'

app/models/ticket/state.rb

@@ -2,12 +2,15 @@
 class Ticket::State < ApplicationModel
   include ChecksLatestChangeObserved
 
+  belongs_to :state_type, class_name: 'Ticket::StateType', inverse_of: :states
+  # rubocop:disable Rails/InverseOf
+  belongs_to :next_state, class_name: 'Ticket::State'
+  # rubocop:enable Rails/InverseOf
+
   after_create  :ensure_defaults
   after_update  :ensure_defaults
   after_destroy :ensure_defaults
 
-  belongs_to    :state_type, class_name: 'Ticket::StateType'
-  belongs_to    :next_state, class_name: 'Ticket::State'
   validates :name, presence: true
 
   attr_accessor :callback_loop

app/models/ticket/state_type.rb

@@ -2,6 +2,7 @@
 class Ticket::StateType < ApplicationModel
   include ChecksLatestChangeObserved
 
-  has_many  :states, class_name: 'Ticket::State'
+  has_many :states, class_name: 'Ticket::State', inverse_of: :state_type
+
   validates :name, presence: true
 end

app/models/ticket/time_accounting.rb

@@ -2,7 +2,7 @@
 class Ticket::TimeAccounting < ApplicationModel
 
   belongs_to :ticket
-  belongs_to    :ticket_article, class_name: 'Ticket::Article'
+  belongs_to :ticket_article, class_name: 'Ticket::Article', inverse_of: :ticket_time_accounting
 
   after_create :ticket_time_unit_update
   after_update :ticket_time_unit_update

app/models/user.rb

@@ -39,6 +39,12 @@ class User < ApplicationModel
   load 'user/search_index.rb'
   include User::SearchIndex
 
+  has_and_belongs_to_many :roles,          after_add: %i[cache_update check_notifications], after_remove: :cache_update, before_add: %i[validate_agent_limit_by_role validate_roles], before_remove: :last_admin_check_by_role, class_name: 'Role'
+  has_and_belongs_to_many :organizations,  after_add: :cache_update, after_remove: :cache_update, class_name: 'Organization'
+  has_many                :tokens,         after_add: :cache_update, after_remove: :cache_update
+  has_many                :authorizations, after_add: :cache_update, after_remove: :cache_update
+  belongs_to              :organization,   inverse_of: :members
+
   before_validation :check_name, :check_email, :check_login, :check_mail_delivery_failed, :ensure_uniq_email, :ensure_password, :ensure_roles, :ensure_identifier
   before_create   :check_preferences_default, :validate_ooo, :domain_based_assignment, :set_locale
   before_update   :check_preferences_default, :validate_ooo, :reset_login_failed, :validate_agent_limit_by_attributes, :last_admin_check_by_attribute
@@ -46,13 +52,6 @@ class User < ApplicationModel
   after_update    :avatar_for_email_check
   before_destroy  :avatar_destroy, :user_device_destroy, :cit_caller_id_destroy, :task_destroy
 
-  has_and_belongs_to_many :roles,           after_add: %i[cache_update check_notifications], after_remove: :cache_update, before_add: %i[validate_agent_limit_by_role validate_roles], before_remove: :last_admin_check_by_role, class_name: 'Role'
-  has_and_belongs_to_many :organizations,   after_add: :cache_update, after_remove: :cache_update, class_name: 'Organization'
-  #has_many                :permissions,     class_name: 'Permission', through: :roles, class_name: 'Role'
-  has_many                :tokens,          after_add: :cache_update, after_remove: :cache_update
-  has_many                :authorizations,  after_add: :cache_update, after_remove: :cache_update
-  belongs_to              :organization,    class_name: 'Organization'
-
   store :preferences
 
   activity_stream_permission 'admin.user'
@@ -804,12 +803,12 @@ returns
     true
   end
 
-  def check_notifications(o, should_save = true)
+  def check_notifications(other, should_save = true)
     default = Rails.configuration.preferences_default_by_permission
     return if !default
     default.deep_stringify_keys!
     has_changed = false
-    o.permissions.each do |permission|
+    other.permissions.each do |permission|
       next if !default[permission.name]
       default[permission.name].each do |key, value|
         next if preferences[key]
@@ -871,11 +870,7 @@ returns
     if (firstname.blank? && lastname.present?) || (firstname.present? && lastname.blank?)
 
       # "Lastname, Firstname"
-      used_name = if firstname.blank?
-                    lastname
-                  else
-                    firstname
-                  end
+      used_name = firstname.presence || lastname
       name = used_name.split(', ', 2)
       if name.count == 2
         if name[0].present?
@@ -948,7 +943,7 @@ returns
     check      = true
     while check
       exists = User.find_by(login: login)
-      if exists && exists.id != id # rubocop:disable Style/SafeNavigation
+      if exists && exists.id != id
         self.login = "#{login}#{rand(999)}"
       else
         check = false

bin/bundle

@@ -1,3 +1,3 @@
 #!/usr/bin/env ruby
-ENV['BUNDLE_GEMFILE'] ||= File.expand_path('../../Gemfile', __FILE__)
+ENV['BUNDLE_GEMFILE'] ||= File.expand_path('../Gemfile', __dir__)
 load Gem.bin_path('bundler', 'bundle')

bin/setup

@@ -2,7 +2,7 @@
 require 'pathname'
 
 # path to your application root.
-APP_ROOT = Pathname.new File.expand_path('../../',  __FILE__)
+APP_ROOT = Pathname.new File.expand_path('..',  __dir__)
 
 Dir.chdir APP_ROOT do
   # This script is a starting point to setup your application.

config/application.rb

@@ -1,4 +1,4 @@
-require File.expand_path('../boot', __FILE__)
+require File.expand_path('boot', __dir__)
 
 require 'rails/all'
 

config/boot.rb

@@ -1,3 +1,3 @@
-ENV['BUNDLE_GEMFILE'] ||= File.expand_path('../../Gemfile', __FILE__)
+ENV['BUNDLE_GEMFILE'] ||= File.expand_path('../Gemfile', __dir__)
 
 require 'bundler/setup' # Set up gems listed in the Gemfile.

config/environment.rb

@@ -1,5 +1,5 @@
 # Load the Rails application.
-require File.expand_path('../application', __FILE__)
+require File.expand_path('application', __dir__)
 
 # Initialize the Rails application.
 Rails.application.initialize!

config/routes.rb

@@ -8,7 +8,7 @@ Rails.application.routes.draw do
   root to: 'init#index', via: :get
 
   # load routes from external files
-  dir = File.expand_path('../', __FILE__)
+  dir = File.expand_path(__dir__)
   files = Dir.glob( "#{dir}/routes/*.rb" )
   files.each do |file|
     if Rails.configuration.cache_classes

db/migrate/20160217000001_object_manager_update_user.rb

@@ -1,4 +1,3 @@
-# rubocop:disable Lint/BooleanSymbol
 class ObjectManagerUpdateUser < ActiveRecord::Migration[4.2]
   def up
 
@@ -569,6 +568,7 @@ class ObjectManagerUpdateUser < ActiveRecord::Migration[4.2]
       position: 1400,
     )
 
+    # rubocop:disable Lint/BooleanSymbol
     ObjectManager::Attribute.add(
       force: true,
       object: 'User',
@@ -607,6 +607,7 @@ class ObjectManagerUpdateUser < ActiveRecord::Migration[4.2]
       to_delete: false,
       position: 1490,
     )
+    # rubocop:enable Lint/BooleanSymbol
 
     ObjectManager::Attribute.add(
       force: true,

db/migrate/20161112000001_organization_domain_based_assignment.rb

@@ -1,4 +1,3 @@
-# rubocop:disable Lint/BooleanSymbol
 class OrganizationDomainBasedAssignment < ActiveRecord::Migration[4.2]
   def up
     # return if it's a new setup
@@ -8,6 +7,7 @@ class OrganizationDomainBasedAssignment < ActiveRecord::Migration[4.2]
     add_column :organizations, :domain_assignment, :boolean, null: false, default: false
     add_index :organizations, [:domain]
 
+    # rubocop:disable Lint/BooleanSymbol
     ObjectManager::Attribute.add(
       force: true,
       object: 'Organization',
@@ -46,6 +46,7 @@ class OrganizationDomainBasedAssignment < ActiveRecord::Migration[4.2]
       updated_by_id: 1,
       created_by_id: 1,
     )
+    # rubocop:enable Lint/BooleanSymbol
 
     ObjectManager::Attribute.add(
       force: true,

db/migrate/20170403000001_fixed_admin_user_permission_920.rb

@@ -1,4 +1,3 @@
-# rubocop:disable Lint/BooleanSymbol
 class FixedAdminUserPermission920 < ActiveRecord::Migration[4.2]
   def up
 
@@ -331,6 +330,7 @@ class FixedAdminUserPermission920 < ActiveRecord::Migration[4.2]
       position: 100,
     )
 
+    # rubocop:disable Lint/BooleanSymbol
     ObjectManager::Attribute.add(
       force: true,
       object: 'TicketArticle',
@@ -363,6 +363,7 @@ class FixedAdminUserPermission920 < ActiveRecord::Migration[4.2]
       to_delete: false,
       position: 200,
     )
+    # rubocop:enable Lint/BooleanSymbol
 
     ObjectManager::Attribute.add(
       force: true,
@@ -487,6 +488,7 @@ class FixedAdminUserPermission920 < ActiveRecord::Migration[4.2]
       position: 1400,
     )
 
+    # rubocop:disable Lint/BooleanSymbol
     ObjectManager::Attribute.add(
       force: true,
       object: 'User',
@@ -523,6 +525,7 @@ class FixedAdminUserPermission920 < ActiveRecord::Migration[4.2]
       to_delete: false,
       position: 1490,
     )
+    # rubocop:enable Lint/BooleanSymbol
 
     ObjectManager::Attribute.add(
       force: true,
@@ -597,6 +600,7 @@ class FixedAdminUserPermission920 < ActiveRecord::Migration[4.2]
       position: 1800,
     )
 
+    # rubocop:disable Lint/BooleanSymbol
     ObjectManager::Attribute.add(
       force: true,
       object: 'Organization',
@@ -672,6 +676,7 @@ class FixedAdminUserPermission920 < ActiveRecord::Migration[4.2]
       to_delete: false,
       position: 1410,
     )
+    # rubocop:enable Lint/BooleanSymbol
 
     ObjectManager::Attribute.add(
       force: true,

db/migrate/20170912123300_remove_network.rb

@@ -1,10 +1,10 @@
-# rubocop:disable Rails/ReversibleMigration
 class RemoveNetwork < ActiveRecord::Migration[5.0]
 
   # rewinds db/migrate/20120101000020_create_network.rb
   def change
     return if !ActiveRecord::Base.connection.table_exists? 'networks'
 
+    # rubocop:disable Rails/ReversibleMigration
     drop_table :networks
     drop_table :network_category_types
     drop_table :network_privacies
@@ -15,5 +15,6 @@ class RemoveNetwork < ActiveRecord::Migration[5.0]
     drop_table :network_item_plus
     drop_table :network_category_subscriptions
     drop_table :network_item_subscriptions
+    # rubocop:enable Rails/ReversibleMigration
   end
 end

db/migrate/20180108000001_change_exchange_external_sync_identifier.rb

@@ -3,8 +3,11 @@ class ChangeExchangeExternalSyncIdentifier < ActiveRecord::Migration[5.1]
     # return if it's a new setup to avoid running the migration
     return if !Setting.find_by(name: 'system_init_done')
 
-    # rubocop:disable Rails/SkipsModelValidations
-    ExternalSync.where(source: 'EWS::FolderContact').update_all(source: 'Exchange::FolderContact')
+    ExternalSync.where(
+      source: 'EWS::FolderContact'
+    ).update_all( # rubocop:disable Rails/SkipsModelValidations
+      source: 'Exchange::FolderContact'
+    )
   end
 
 end

db/seeds/object_manager_attributes.rb

@@ -1,4 +1,3 @@
-# rubocop:disable Lint/BooleanSymbol
 ObjectManager::Attribute.add(
   force: true,
   object: 'Ticket',

lib/core_ext/open-uri.rb

@@ -1,11 +1,9 @@
-# rubocop:disable Naming/FileName
-# rubocop:disable Style/CommentedKeyword
-if Kernel.respond_to?(:open_uri_original_open)
+if Kernel.respond_to?(:open_uri_original_open) # rubocop:disable Naming/FileName
   module Kernel
     private
 
     # see: https://github.com/ruby/ruby/pull/1675
-    def open(name, *rest, &block) # :doc:
+    def open(name, *rest, &block)
       if name.respond_to?(:open) && name.method(:open).parameters.present?
         name.open(*rest, &block)
       elsif name.respond_to?(:to_str) &&

lib/email_helper/verify.rb

@@ -56,11 +56,7 @@ or
     def self.email(params)
 
       # send verify email
-      subject = if params[:subject].blank?
-                  '#' + rand(99_999_999_999).to_s
-                else
-                  params[:subject]
-                end
+      subject = params[:subject].presence || '#' + rand(99_999_999_999).to_s
       result = EmailHelper::Probe.outbound(params[:outbound], params[:sender], subject)
       if result[:result] != 'ok'
         result[:source] = 'outbound'

lib/fill_db.rb

@@ -205,3 +205,4 @@ or if you only want to create 100 tickets
     end
   end
 end
+# rubocop:enable Rails/Output

lib/html_sanitizer.rb

@@ -168,7 +168,7 @@ satinize html string based on whiltelist
       end
 
       # remove attributes if not whitelisted
-      node.each do |attribute, _value| # rubocop:disable Performance/HashEachMethods
+      node.each do |attribute, _value|
         attribute_name = attribute.downcase
         next if attributes_whitelist[:all].include?(attribute_name) || (attributes_whitelist[node.name]&.include?(attribute_name))
         node.delete(attribute)

lib/import/exchange/item_attributes.rb

@@ -11,7 +11,7 @@ module Import
       end
 
       def extract
-        @attributes ||= begin
+        @extract ||= begin
           properties  = @resource.get_all_properties!
           result      = normalize(properties)
           flattened   = flatten(result)

lib/import/zendesk/object_attribute/base.rb

@@ -21,6 +21,7 @@ module Import
         rescue => e
           # rubocop:disable Style/SpecialGlobalVars
           raise $!, "Problem with ObjectManager Attribute '#{name}': #{$!}", $!.backtrace
+          # rubocop:enable Style/SpecialGlobalVars
         end
 
         def attribute_config(object, name, attribute)

lib/ldap.rb

@@ -11,7 +11,7 @@ require 'net/ldap/entry'
 #   @return [String] the base dn used while initializing the connection
 class Ldap
 
-  attr_reader :connection, :base_dn, :host, :port, :ssl
+  attr_reader :base_dn, :host, :port, :ssl
 
   # Initializes a LDAP connection.
   #
@@ -35,7 +35,8 @@ class Ldap
       @config = Setting.get('ldap_config')
     end
 
-    connect
+    # connect on initialization
+    connection
   end
 
   # Requests the rootDSE (the root of the directory data tree on a directory server).
@@ -46,7 +47,7 @@ class Ldap
   #
   # @return [Hash{String => Array<String>}] The found RootDSEs.
   def preferences
-    @connection.search_root_dse.to_h
+    connection.search_root_dse.to_h
   end
 
   # Performs a LDAP search and yields over the found LDAP entries.
@@ -68,7 +69,7 @@ class Ldap
     base  ||= base_dn()
     scope ||= Net::LDAP::SearchScope_WholeSubtree
 
-    @connection.search(
+    connection.search(
       base:          base,
       filter:        filter,
       scope:         scope,
@@ -114,15 +115,15 @@ class Ldap
     counter
   end
 
-  private
-
-  def connect
+  def connection
     @connection ||= begin
       attributes_from_config
       binded_connection
     end
   end
 
+  private
+
   def binded_connection
     # ldap connect
     ldap = Net::LDAP.new(connection_params)
@@ -175,7 +176,7 @@ class Ldap
 
     # fallback to default
     # port if none given
-    @port ||= 389
+    @port ||= 389 # rubocop:disable Naming/MemoizedInstanceVariableName
   end
 
   def parse_host_url

lib/ldap/guid.rb

@@ -76,7 +76,7 @@ class Ldap
     #
     # @return [String] The GUID equivalent of the HEX string.
     def string
-      oracle_raw16(guid.unpack('H*').first, dashify: true)
+      oracle_raw16(guid.unpack1('H*'), dashify: true)
     end
 
     private

lib/notification_factory/mailer.rb

@@ -172,7 +172,7 @@ returns
     )
 
     # rebuild subject
-    if data[:main_object] && data[:main_object].respond_to?(:subject_build)
+    if data[:main_object].respond_to?(:subject_build)
       result[:subject] = data[:main_object].subject_build(result[:subject])
     end
 

lib/password_hash.rb

@@ -3,8 +3,7 @@
 module PasswordHash
   include ApplicationLib
 
-  # rubocop:disable Style/ModuleFunction
-  extend self
+  extend self # rubocop:disable Style/ModuleFunction
 
   def crypt(password)
     argon2.create(password)

lib/sequencer/units/attributes.rb

@@ -53,7 +53,7 @@ class Sequencer
       end
 
       def __setobj__(declarations)
-        @attributes ||= begin
+        @attributes ||= begin # rubocop:disable Naming/MemoizedInstanceVariableName
           attributes = Hash.new do |hash, key|
             hash[key] = Sequencer::Units::Attribute.new
           end

lib/service/image/zammad.rb

@@ -2,11 +2,10 @@
 
 class Service::Image::Zammad
 
-  # rubocop:disable Style/ClassVars
-  @@api_host = 'https://images.zammad.com'
-  @@open_timeout = 4
-  @@read_timeout = 6
-  @@total_timeout = 6
+  API_HOST      = 'https://images.zammad.com'.freeze
+  OPEN_TIMEOUT  = 4
+  READ_TIMEOUT  = 6
+  TOTAL_TIMEOUT = 6
 
   def self.user(email)
     raise Exceptions::UnprocessableEntity, 'no email given' if email.blank?
@@ -17,14 +16,14 @@ class Service::Image::Zammad
 
     # fetch image
     response = UserAgent.post(
-      "#{@@api_host}/api/v1/person/image",
+      "#{API_HOST}/api/v1/person/image",
       {
         email: email,
       },
       {
-        open_timeout: @@open_timeout,
-        read_timeout: @@read_timeout,
-        total_timeout: @@total_timeout,
+        open_timeout:  OPEN_TIMEOUT,
+        read_timeout:  READ_TIMEOUT,
+        total_timeout: TOTAL_TIMEOUT,
       },
     )
     if !response.success?
@@ -50,14 +49,14 @@ class Service::Image::Zammad
 
     # fetch org logo
     response = UserAgent.post(
-      "#{@@api_host}/api/v1/organization/image",
+      "#{API_HOST}/api/v1/organization/image",
       {
         domain: domain
       },
       {
-        open_timeout: @@open_timeout,
-        read_timeout: @@read_timeout,
-        total_timeout: @@total_timeout,
+        open_timeout:  OPEN_TIMEOUT,
+        read_timeout:  READ_TIMEOUT,
+        total_timeout: TOTAL_TIMEOUT,
       },
     )
     if !response.success?

lib/session_helper.rb

@@ -5,7 +5,7 @@ module SessionHelper
     default_collection = {}
 
     # load collections to deliver from external files
-    dir = File.expand_path('../../', __FILE__)
+    dir = File.expand_path('..', __dir__)
     files = Dir.glob( "#{dir}/app/controllers/sessions/collection_*.rb")
     files.each do |file|
       load file

lib/sessions/backend/collections.rb

@@ -28,7 +28,7 @@ class Sessions::Backend::Collections < Sessions::Backend::Base
     backends = []
 
     # load collections to deliver from external files
-    dir = File.expand_path('../../../../', __FILE__)
+    dir = File.expand_path('../../..', __dir__)
     files = Dir.glob("#{dir}/lib/sessions/backend/collections/*.rb")
     files.each do |file|
       file.gsub!("#{dir}/lib/", '')

script/rails

@@ -1,6 +1,6 @@
 #!/usr/bin/env ruby
 # This command will automatically be run when you run "rails" with Rails 3 gems installed from the root of your application.
 
-APP_PATH = File.expand_path('../../config/application',  __FILE__)
-require File.expand_path('../../config/boot',  __FILE__)
+APP_PATH = File.expand_path('../config/application',  __dir__)
+require File.expand_path('../config/boot',  __dir__)
 require 'rails/commands'

spec/models/import_job_spec.rb

@@ -57,7 +57,6 @@ RSpec.describe ImportJob do
           payload: {},
           delay:   false
         )
-
       end.not_to change {
         Delayed::Job.count
       }
@@ -72,7 +71,6 @@ RSpec.describe ImportJob do
           name:    test_backend_name,
           payload: {},
         )
-
       end.not_to change {
         Delayed::Job.count
       }

spec/models/scheduler_spec.rb

@@ -14,6 +14,7 @@ RSpec.describe Scheduler do
         def self.reschedule=(reschedule)
           @reschedule = reschedule
         end
+        # rubocop:enable Style/TrivialAccessors
 
         def self.reschedule?(_delayed_job)
           @reschedule || false

spec/rails_helper.rb

@@ -1,6 +1,6 @@
 # This file is copied to spec/ when you run 'rails generate rspec:install'
 ENV['RAILS_ENV'] ||= 'test'
-require File.expand_path('../../config/environment', __FILE__)
+require File.expand_path('../config/environment', __dir__)
 
 # Prevent database truncation if the environment is production
 abort('The Rails environment is running in production mode!') if Rails.env.production?

test/browser/admin_object_manager_test.rb

@@ -1,4 +1,3 @@
-# rubocop:disable Lint/BooleanSymbol
 require 'browser_test_helper'
 
 class AdminObjectManagerTest < TestCase
@@ -248,6 +247,7 @@ class AdminObjectManagerTest < TestCase
       },
     )
 
+    # rubocop:disable Lint/BooleanSymbol
     object_manager_attribute_create(
       data: {
         name: 'browser_test7',
@@ -262,6 +262,7 @@ class AdminObjectManagerTest < TestCase
         },
       },
     )
+    # rubocop:enable Lint/BooleanSymbol
 
     watch_for(
       css: '.content.active',

test/browser_test_helper.rb

@@ -1,10 +1,12 @@
 ENV['RAILS_ENV'] = 'test'
-# rubocop:disable HandleExceptions, ClassVars, NonLocalExitFromIterator, Style/GuardClause
-require File.expand_path('../../config/environment', __FILE__)
+# rubocop:disable HandleExceptions, NonLocalExitFromIterator, Style/GuardClause, Lint/MissingCopEnableDirective
+require File.expand_path('../config/environment', __dir__)
 require 'selenium-webdriver'
 
 class TestCase < Test::Unit::TestCase
-  @@debug = true
+
+  DEBUG = true
+
   def browser
     ENV['BROWSER'] || 'firefox'
   end
@@ -60,7 +62,7 @@ class TestCase < Test::Unit::TestCase
         local_browser = browser_instance_remote
         break
       rescue
-        wait_until_ready = rand(9) + 5
+        wait_until_ready = rand(5..13)
         sleep wait_until_ready
         log('browser_instance', { rescure: true, count: count, sleep: wait_until_ready })
       end
@@ -3696,7 +3698,7 @@ wait untill text in selector disabppears
     rescue
       # failed to get logs
     end
-    return if !@@debug
+    return if !DEBUG
     return if params[:mute_log]
     puts "#{Time.zone.now}/#{method}: #{params.inspect}"
   end

test/integration/object_manager_attributes_controller_test.rb

@@ -1,4 +1,3 @@
-# rubocop:disable Lint/BooleanSymbol
 require 'test_helper'
 require 'rake'
 

test/integration/object_manager_test.rb

@@ -1,4 +1,3 @@
-# rubocop:disable Lint/BooleanSymbol
 require 'test_helper'
 
 class ObjectManagerTest < ActiveSupport::TestCase

test/integration_test_helper.rb

@@ -1,5 +1,5 @@
 ENV['RAILS_ENV'] = 'test'
-require File.expand_path('../../config/environment', __FILE__)
+require File.expand_path('../config/environment', __dir__)
 require 'rails/test_help'
 require 'cache'
 

test/test_helper.rb

@@ -1,5 +1,5 @@
 ENV['RAILS_ENV'] = 'test'
-require File.expand_path('../../config/environment', __FILE__)
+require File.expand_path('../config/environment', __dir__)
 require 'rails/test_help'
 require 'cache'
 require 'simplecov'

test/unit/email_process_auto_response_test.rb

@@ -1,4 +1,3 @@
-# rubocop:disable Lint/InterpolationCheck
 require 'test_helper'
 
 class EmailProcessAutoResponseTest < ActiveSupport::TestCase

test/unit/email_process_bounce_delivery_permanent_failed_test.rb

@@ -1,4 +1,3 @@
-# rubocop:disable Lint/InterpolationCheck
 require 'test_helper'
 
 class EmailProcessBounceDeliveryPermanentFailedTest < ActiveSupport::TestCase

test/unit/email_process_bounce_follow_test.rb

@@ -1,4 +1,3 @@
-# rubocop:disable Lint/InterpolationCheck
 require 'test_helper'
 
 class EmailProcessBounceFollowUpTest < ActiveSupport::TestCase

test/unit/notification_factory_renderer_test.rb

@@ -1,4 +1,3 @@
-# rubocop:disable Lint/InterpolationCheck
 require 'test_helper'
 
 class NotificationFactoryRendererTest < ActiveSupport::TestCase

test/unit/notification_factory_template_test.rb

@@ -1,4 +1,3 @@
-# rubocop:disable Lint/InterpolationCheck
 require 'test_helper'
 
 class NotificationFactoryTemplateTest < ActiveSupport::TestCase

test/unit/organization_assets_test.rb

@@ -139,18 +139,18 @@ class OrganizationAssetsTest < ActiveSupport::TestCase
     assert_not(Organization.find_by(id: org_new.id))
   end
 
-  def diff(o1, o2)
-    return true if o1 == o2
+  def diff(object1, object2)
+    return true if object1 == object2
     %w[updated_at created_at].each do |item|
-      if o1[item]
-        o1[item] = o1[item].to_s
+      if object1[item]
+        object1[item] = object1[item].to_s
       end
-      if o2[item]
-        o2[item] = o2[item].to_s
+      if object2[item]
+        object2[item] = object2[item].to_s
       end
     end
-    return true if (o1.to_a - o2.to_a).blank?
-    #puts "ERROR: difference \n1: #{o1.inspect}\n2: #{o2.inspect}\ndiff: #{(o1.to_a - o2.to_a).inspect}"
+    return true if (object1.to_a - object2.to_a).blank?
+    #puts "ERROR: difference \n1: #{object1.inspect}\n2: #{object2.inspect}\ndiff: #{(object1.to_a - object2.to_a).inspect}"
     false
   end
 

test/unit/ticket_article_dos_test.rb

@@ -3,6 +3,10 @@ require 'test_helper'
 
 class TicketArticleDos < ActiveSupport::TestCase
 
+  def two_mio_random_chars
+    @two_mio_random_chars ||= Array.new(2_000_000) { [*'0'..'9', *'a'..'z', ' ', ' ', ' ', '. '].sample }.join
+  end
+
   test 'check body size' do
 
     org_community = Organization.create_if_not_exists(
@@ -36,7 +40,7 @@ class TicketArticleDos < ActiveSupport::TestCase
       type_id: Ticket::Article::Type.find_by(name: 'phone').id,
       sender_id: Ticket::Article::Sender.find_by(name: 'Customer').id,
       from: 'Zammad Feedback <feedback@example.org>',
-      body: Array.new(2_000_000) { [*'0'..'9', *'a'..'z', ' ', ' ', ' ', '. '].sample }.join,
+      body: two_mio_random_chars,
       internal: false,
       updated_by_id: 1,
       created_by_id: 1,
@@ -55,7 +59,7 @@ class TicketArticleDos < ActiveSupport::TestCase
       type_id: Ticket::Article::Type.find_by(name: 'phone').id,
       sender_id: Ticket::Article::Sender.find_by(name: 'Customer').id,
       from: 'Zammad Feedback <feedback@example.org>',
-      body: "\u0000#{Array.new(2_000_000) { [*'0'..'9', *'a'..'z', ' ', ' ', ' ', '. '].sample }.join}",
+      body: "\u0000#{two_mio_random_chars}",
       internal: false,
       updated_by_id: 1,
       created_by_id: 1,
@@ -78,7 +82,7 @@ class TicketArticleDos < ActiveSupport::TestCase
         type_id: Ticket::Article::Type.find_by(name: 'phone').id,
         sender_id: Ticket::Article::Sender.find_by(name: 'Customer').id,
         from: 'Zammad Feedback <feedback@example.org>',
-        body: "\u0000#{Array.new(2_000_000) { [*'0'..'9', *'a'..'z', ' ', ' ', ' ', '. '].sample }.join}",
+        body: "\u0000#{two_mio_random_chars}",
         internal: false,
         updated_by_id: 1,
         created_by_id: 1,
@@ -89,11 +93,13 @@ class TicketArticleDos < ActiveSupport::TestCase
 
   test 'check body size / cut if email' do
 
-    email_raw_string = "From: me@example.com
+    email_raw_string = <<-MAIL.strip_indent
+      From: me@example.com
       To: customer@example.com
       Subject: some new subject
 
-Some Text" + Array.new(2_000_000) { [*'0'..'9', *'a'..'z', ' ', ' ', ' ', '. '].sample }.join
+      Some Text#{two_mio_random_chars}
+    MAIL
 
     ticket_p, article_p, user_p, mail = Channel::EmailParser.new.process({}, email_raw_string)
     assert_equal(1_500_000, article_p.body.length)

test/unit/ticket_trigger_test.rb

@@ -1,4 +1,3 @@
-# rubocop:disable Lint/InterpolationCheck
 require 'test_helper'
 
 class TicketTriggerTest < ActiveSupport::TestCase

test/unit/user_assets_test.rb

@@ -139,18 +139,18 @@ class UserAssetsTest < ActiveSupport::TestCase
     assert_not(Organization.find_by(id: org2.id))
   end
 
-  def diff(o1, o2)
-    return true if o1 == o2
+  def diff(object1, object2)
+    return true if object1 == object2
     %w[updated_at created_at].each do |item|
-      if o1[item]
-        o1[item] = o1[item].to_s
+      if object1[item]
+        object1[item] = object1[item].to_s
       end
-      if o2[item]
-        o2[item] = o2[item].to_s
+      if object2[item]
+        object2[item] = object2[item].to_s
       end
     end
-    return true if (o1.to_a - o2.to_a).blank?
-    #puts "ERROR: difference \n1: #{o1.inspect}\n2: #{o2.inspect}\ndiff: #{(o1.to_a - o2.to_a).inspect}"
+    return true if (object1.to_a - object2.to_a).blank?
+    #puts "ERROR: difference \n1: #{object1.inspect}\n2: #{object2.inspect}\ndiff: #{(object1.to_a - object2.to_a).inspect}"
     false
   end