Use frozen string literal in actionmailer/

42 files changed, 83 insertions, 0 deletions

diff --git a/actionmailer/Rakefile b/actionmailer/Rakefile
index 6f05d236d9..6ac408e1cb 100644
--- a/actionmailer/Rakefile
+++ b/actionmailer/Rakefile
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require "rake/testtask"
 
 desc "Default Task"
diff --git a/actionmailer/actionmailer.gemspec b/actionmailer/actionmailer.gemspec
index ae908ddda7..b8a2e80bd3 100644
--- a/actionmailer/actionmailer.gemspec
+++ b/actionmailer/actionmailer.gemspec
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 version = File.read(File.expand_path("../RAILS_VERSION", __dir__)).strip
 
 Gem::Specification.new do |s|
diff --git a/actionmailer/bin/test b/actionmailer/bin/test
index 470ce93f10..c53377cc97 100755
--- a/actionmailer/bin/test
+++ b/actionmailer/bin/test
@@ -1,4 +1,5 @@
 #!/usr/bin/env ruby
+# frozen_string_literal: true
 
 COMPONENT_ROOT = File.expand_path("..", __dir__)
 require_relative "../../tools/test"
diff --git a/actionmailer/lib/action_mailer.rb b/actionmailer/lib/action_mailer.rb
index 8eba811ab6..a170eb7917 100644
--- a/actionmailer/lib/action_mailer.rb
+++ b/actionmailer/lib/action_mailer.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 #--
 # Copyright (c) 2004-2017 David Heinemeier Hansson
 #
diff --git a/actionmailer/lib/action_mailer/base.rb b/actionmailer/lib/action_mailer/base.rb
index 2b4992791d..6add4ec89c 100644
--- a/actionmailer/lib/action_mailer/base.rb
+++ b/actionmailer/lib/action_mailer/base.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require "mail"
 require_relative "collector"
 require "active_support/core_ext/string/inflections"
diff --git a/actionmailer/lib/action_mailer/collector.rb b/actionmailer/lib/action_mailer/collector.rb
index d97a73d65a..888410fa75 100644
--- a/actionmailer/lib/action_mailer/collector.rb
+++ b/actionmailer/lib/action_mailer/collector.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require "abstract_controller/collector"
 require "active_support/core_ext/hash/reverse_merge"
 require "active_support/core_ext/array/extract_options"
diff --git a/actionmailer/lib/action_mailer/delivery_job.rb b/actionmailer/lib/action_mailer/delivery_job.rb
index a617daa87e..40f26d8ad1 100644
--- a/actionmailer/lib/action_mailer/delivery_job.rb
+++ b/actionmailer/lib/action_mailer/delivery_job.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require "active_job"
 
 module ActionMailer
diff --git a/actionmailer/lib/action_mailer/delivery_methods.rb b/actionmailer/lib/action_mailer/delivery_methods.rb
index 93ae10fd70..5cd62307e6 100644
--- a/actionmailer/lib/action_mailer/delivery_methods.rb
+++ b/actionmailer/lib/action_mailer/delivery_methods.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require "tmpdir"
 
 module ActionMailer
diff --git a/actionmailer/lib/action_mailer/gem_version.rb b/actionmailer/lib/action_mailer/gem_version.rb
index f5594ef928..063d4580d8 100644
--- a/actionmailer/lib/action_mailer/gem_version.rb
+++ b/actionmailer/lib/action_mailer/gem_version.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module ActionMailer
   # Returns the version of the currently loaded Action Mailer as a <tt>Gem::Version</tt>.
   def self.gem_version
diff --git a/actionmailer/lib/action_mailer/inline_preview_interceptor.rb b/actionmailer/lib/action_mailer/inline_preview_interceptor.rb
index 980415afe0..4bef4a58d3 100644
--- a/actionmailer/lib/action_mailer/inline_preview_interceptor.rb
+++ b/actionmailer/lib/action_mailer/inline_preview_interceptor.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require "base64"
 
 module ActionMailer
diff --git a/actionmailer/lib/action_mailer/log_subscriber.rb b/actionmailer/lib/action_mailer/log_subscriber.rb
index 2c058ccf66..87cfbfff28 100644
--- a/actionmailer/lib/action_mailer/log_subscriber.rb
+++ b/actionmailer/lib/action_mailer/log_subscriber.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require "active_support/log_subscriber"
 
 module ActionMailer
diff --git a/actionmailer/lib/action_mailer/mail_helper.rb b/actionmailer/lib/action_mailer/mail_helper.rb
index e04fc08866..e7bed41f8d 100644
--- a/actionmailer/lib/action_mailer/mail_helper.rb
+++ b/actionmailer/lib/action_mailer/mail_helper.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module ActionMailer
   # Provides helper methods for ActionMailer::Base that can be used for easily
   # formatting messages, accessing mailer or message instances, and the
diff --git a/actionmailer/lib/action_mailer/message_delivery.rb b/actionmailer/lib/action_mailer/message_delivery.rb
index 0b54e12431..fe7265834f 100644
--- a/actionmailer/lib/action_mailer/message_delivery.rb
+++ b/actionmailer/lib/action_mailer/message_delivery.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require "delegate"
 
 module ActionMailer
diff --git a/actionmailer/lib/action_mailer/parameterized.rb b/actionmailer/lib/action_mailer/parameterized.rb
index 3acacc1f14..5e768e7106 100644
--- a/actionmailer/lib/action_mailer/parameterized.rb
+++ b/actionmailer/lib/action_mailer/parameterized.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module ActionMailer
   # Provides the option to parameterize mailers in order to share instance variable
   # setup, processing, and common headers.
diff --git a/actionmailer/lib/action_mailer/preview.rb b/actionmailer/lib/action_mailer/preview.rb
index 4f72eca930..4a8d3659ec 100644
--- a/actionmailer/lib/action_mailer/preview.rb
+++ b/actionmailer/lib/action_mailer/preview.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require "active_support/descendants_tracker"
 
 module ActionMailer
diff --git a/actionmailer/lib/action_mailer/railtie.rb b/actionmailer/lib/action_mailer/railtie.rb
index 913df8cf93..36c2e5866d 100644
--- a/actionmailer/lib/action_mailer/railtie.rb
+++ b/actionmailer/lib/action_mailer/railtie.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require "active_job/railtie"
 require "action_mailer"
 require "rails"
diff --git a/actionmailer/lib/action_mailer/rescuable.rb b/actionmailer/lib/action_mailer/rescuable.rb
index f2eabfa057..28950eb834 100644
--- a/actionmailer/lib/action_mailer/rescuable.rb
+++ b/actionmailer/lib/action_mailer/rescuable.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module ActionMailer #:nodoc:
   # Provides `rescue_from` for mailers. Wraps mailer action processing,
   # mail job processing, and mail delivery.
diff --git a/actionmailer/lib/action_mailer/test_case.rb b/actionmailer/lib/action_mailer/test_case.rb
index 9ead03a40c..ee5a864847 100644
--- a/actionmailer/lib/action_mailer/test_case.rb
+++ b/actionmailer/lib/action_mailer/test_case.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require "active_support/test_case"
 require "rails-dom-testing"
 
diff --git a/actionmailer/lib/action_mailer/test_helper.rb b/actionmailer/lib/action_mailer/test_helper.rb
index c30fb1fc18..ac8b944743 100644
--- a/actionmailer/lib/action_mailer/test_helper.rb
+++ b/actionmailer/lib/action_mailer/test_helper.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require "active_job"
 
 module ActionMailer
diff --git a/actionmailer/lib/action_mailer/version.rb b/actionmailer/lib/action_mailer/version.rb
index 8452d6370e..4549d6eb57 100644
--- a/actionmailer/lib/action_mailer/version.rb
+++ b/actionmailer/lib/action_mailer/version.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require_relative "gem_version"
 
 module ActionMailer
diff --git a/actionmailer/lib/rails/generators/mailer/mailer_generator.rb b/actionmailer/lib/rails/generators/mailer/mailer_generator.rb
index bc21b07109..97eac30db1 100644
--- a/actionmailer/lib/rails/generators/mailer/mailer_generator.rb
+++ b/actionmailer/lib/rails/generators/mailer/mailer_generator.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Rails
   module Generators
     class MailerGenerator < NamedBase
diff --git a/actionmailer/test/abstract_unit.rb b/actionmailer/test/abstract_unit.rb
index dbfdb07e6e..45f69d5375 100644
--- a/actionmailer/test/abstract_unit.rb
+++ b/actionmailer/test/abstract_unit.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require "active_support/core_ext/kernel/reporting"
 
 # These are the normal settings that will be set up by Railties
diff --git a/actionmailer/test/assert_select_email_test.rb b/actionmailer/test/assert_select_email_test.rb
index bf14fe0853..eb58ddd9c9 100644
--- a/actionmailer/test/assert_select_email_test.rb
+++ b/actionmailer/test/assert_select_email_test.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require "abstract_unit"
 
 class AssertSelectEmailTest < ActionMailer::TestCase
diff --git a/actionmailer/test/asset_host_test.rb b/actionmailer/test/asset_host_test.rb
index 812df01a34..2a14248488 100644
--- a/actionmailer/test/asset_host_test.rb
+++ b/actionmailer/test/asset_host_test.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require "abstract_unit"
 require "action_controller"
 
diff --git a/actionmailer/test/base_test.rb b/actionmailer/test/base_test.rb
index 06d4ea197c..2b0e2165e3 100644
--- a/actionmailer/test/base_test.rb
+++ b/actionmailer/test/base_test.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require "abstract_unit"
 require "set"
 
diff --git a/actionmailer/test/caching_test.rb b/actionmailer/test/caching_test.rb
index e76466439e..e11e8d4676 100644
--- a/actionmailer/test/caching_test.rb
+++ b/actionmailer/test/caching_test.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require "fileutils"
 require "abstract_unit"
 require "mailers/base_mailer"
diff --git a/actionmailer/test/delivery_methods_test.rb b/actionmailer/test/delivery_methods_test.rb
index f64a69019f..025f7152bb 100644
--- a/actionmailer/test/delivery_methods_test.rb
+++ b/actionmailer/test/delivery_methods_test.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require "abstract_unit"
 
 class MyCustomDelivery
diff --git a/actionmailer/test/i18n_with_controller_test.rb b/actionmailer/test/i18n_with_controller_test.rb
index 4f09339800..6e75cff347 100644
--- a/actionmailer/test/i18n_with_controller_test.rb
+++ b/actionmailer/test/i18n_with_controller_test.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require "abstract_unit"
 require "action_view"
 require "action_controller"
diff --git a/actionmailer/test/log_subscriber_test.rb b/actionmailer/test/log_subscriber_test.rb
index 799c6144d7..2e89758dfb 100644
--- a/actionmailer/test/log_subscriber_test.rb
+++ b/actionmailer/test/log_subscriber_test.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require "abstract_unit"
 require "mailers/base_mailer"
 require "active_support/log_subscriber/test_helper"
diff --git a/actionmailer/test/mail_helper_test.rb b/actionmailer/test/mail_helper_test.rb
index 6042548aef..51d6ccb10f 100644
--- a/actionmailer/test/mail_helper_test.rb
+++ b/actionmailer/test/mail_helper_test.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require "abstract_unit"
 
 class HelperMailer < ActionMailer::Base
diff --git a/actionmailer/test/mail_layout_test.rb b/actionmailer/test/mail_layout_test.rb
index 73059d782d..16d77ed61d 100644
--- a/actionmailer/test/mail_layout_test.rb
+++ b/actionmailer/test/mail_layout_test.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require "abstract_unit"
 
 class AutoLayoutMailer < ActionMailer::Base
diff --git a/actionmailer/test/mailers/asset_mailer.rb b/actionmailer/test/mailers/asset_mailer.rb
index 1cf15128d2..7a9aba2629 100644
--- a/actionmailer/test/mailers/asset_mailer.rb
+++ b/actionmailer/test/mailers/asset_mailer.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class AssetMailer < ActionMailer::Base
   self.mailer_name = "asset_mailer"
 
diff --git a/actionmailer/test/mailers/base_mailer.rb b/actionmailer/test/mailers/base_mailer.rb
index 2a8884959c..bfaecdb658 100644
--- a/actionmailer/test/mailers/base_mailer.rb
+++ b/actionmailer/test/mailers/base_mailer.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class BaseMailer < ActionMailer::Base
   self.mailer_name = "base_mailer"
 
diff --git a/actionmailer/test/mailers/caching_mailer.rb b/actionmailer/test/mailers/caching_mailer.rb
index 92d3cff7c9..02f0c6c103 100644
--- a/actionmailer/test/mailers/caching_mailer.rb
+++ b/actionmailer/test/mailers/caching_mailer.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class CachingMailer < ActionMailer::Base
   self.mailer_name = "caching_mailer"
 
diff --git a/actionmailer/test/mailers/delayed_mailer.rb b/actionmailer/test/mailers/delayed_mailer.rb
index cae4ec2f48..b0f5ecc2fb 100644
--- a/actionmailer/test/mailers/delayed_mailer.rb
+++ b/actionmailer/test/mailers/delayed_mailer.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require "active_job/arguments"
 
 class DelayedMailerError < StandardError; end
diff --git a/actionmailer/test/mailers/params_mailer.rb b/actionmailer/test/mailers/params_mailer.rb
index 4c0fae6d91..84aa336311 100644
--- a/actionmailer/test/mailers/params_mailer.rb
+++ b/actionmailer/test/mailers/params_mailer.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class ParamsMailer < ActionMailer::Base
   before_action { @inviter, @invitee = params[:inviter], params[:invitee] }
 
diff --git a/actionmailer/test/mailers/proc_mailer.rb b/actionmailer/test/mailers/proc_mailer.rb
index 2487db9eb9..b7cf53eb4a 100644
--- a/actionmailer/test/mailers/proc_mailer.rb
+++ b/actionmailer/test/mailers/proc_mailer.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class ProcMailer < ActionMailer::Base
   default to: "system@test.lindsaar.net",
           "X-Proc-Method" => Proc.new { Time.now.to_i.to_s },
diff --git a/actionmailer/test/message_delivery_test.rb b/actionmailer/test/message_delivery_test.rb
index 51f10b0bf1..89a3c7475e 100644
--- a/actionmailer/test/message_delivery_test.rb
+++ b/actionmailer/test/message_delivery_test.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require "abstract_unit"
 require "active_job"
 require "mailers/delayed_mailer"
diff --git a/actionmailer/test/parameterized_test.rb b/actionmailer/test/parameterized_test.rb
index e988fffcb9..ec6c5e9e67 100644
--- a/actionmailer/test/parameterized_test.rb
+++ b/actionmailer/test/parameterized_test.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require "abstract_unit"
 require "active_job"
 require "mailers/params_mailer"
diff --git a/actionmailer/test/test_case_test.rb b/actionmailer/test/test_case_test.rb
index 193d107b0a..7b9647d295 100644
--- a/actionmailer/test/test_case_test.rb
+++ b/actionmailer/test/test_case_test.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require "abstract_unit"
 
 class TestTestMailer < ActionMailer::Base
diff --git a/actionmailer/test/test_helper_test.rb b/actionmailer/test/test_helper_test.rb
index 876e9b0634..abf50cf4da 100644
--- a/actionmailer/test/test_helper_test.rb
+++ b/actionmailer/test/test_helper_test.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require "abstract_unit"
 require "active_support/testing/stream"
 
diff --git a/actionmailer/test/url_test.rb b/actionmailer/test/url_test.rb
index 6dbfb3a1ff..0bd3371878 100644
--- a/actionmailer/test/url_test.rb
+++ b/actionmailer/test/url_test.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require "abstract_unit"
 require "action_controller"