Enforce frozen string in Rubocop

author: Kir Shatrov <shatrov@me.com> 2017-06-22 22:59:18 -0400
committer: Kir Shatrov <shatrov@me.com> 2017-07-01 02:11:03 +0300
commit: cfade1ec7ee7b5b51f3c1578e3474f9c156f2971 (patch)
tree: 5c12d112bf4d039587d712b0cae92a2d920fee23 /actionpack
parent: 5fe2a4f929fff7fa725545c47ac0f9372d8c643d (diff)
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310 files changed, 310 insertions, 0 deletions
diff --git a/actionpack/Rakefile b/actionpack/Rakefile
index 69408c8aab..984951f96d 100644
--- a/actionpack/Rakefile
+++ b/actionpack/Rakefile
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "rake/testtask"
 
 test_files = Dir.glob("test/**/*_test.rb")
diff --git a/actionpack/actionpack.gemspec b/actionpack/actionpack.gemspec
index 294cc45593..a09c23bdb5 100644
--- a/actionpack/actionpack.gemspec
+++ b/actionpack/actionpack.gemspec
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 version = File.read(File.expand_path("../RAILS_VERSION", __dir__)).strip
 
 Gem::Specification.new do |s|
diff --git a/actionpack/bin/test b/actionpack/bin/test
index 470ce93f10..c53377cc97 100755
--- a/actionpack/bin/test
+++ b/actionpack/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/actionpack/lib/abstract_controller.rb b/actionpack/lib/abstract_controller.rb
index 8bd965b198..5d56d71aa1 100644
--- a/actionpack/lib/abstract_controller.rb
+++ b/actionpack/lib/abstract_controller.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "action_pack"
 require "active_support/rails"
 require "active_support/i18n"
diff --git a/actionpack/lib/abstract_controller/asset_paths.rb b/actionpack/lib/abstract_controller/asset_paths.rb
index e6170228d9..96031b3aa0 100644
--- a/actionpack/lib/abstract_controller/asset_paths.rb
+++ b/actionpack/lib/abstract_controller/asset_paths.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 module AbstractController
   module AssetPaths #:nodoc:
     extend ActiveSupport::Concern
diff --git a/actionpack/lib/abstract_controller/base.rb b/actionpack/lib/abstract_controller/base.rb
index dc79820a82..0046baacd0 100644
--- a/actionpack/lib/abstract_controller/base.rb
+++ b/actionpack/lib/abstract_controller/base.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_controller/error"
 require "active_support/configurable"
 require "active_support/descendants_tracker"
diff --git a/actionpack/lib/abstract_controller/caching.rb b/actionpack/lib/abstract_controller/caching.rb
index 30e3d4426c..272ec79970 100644
--- a/actionpack/lib/abstract_controller/caching.rb
+++ b/actionpack/lib/abstract_controller/caching.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 module AbstractController
   module Caching
     extend ActiveSupport::Concern
diff --git a/actionpack/lib/abstract_controller/caching/fragments.rb b/actionpack/lib/abstract_controller/caching/fragments.rb
index 14e4a82523..1fe653cd12 100644
--- a/actionpack/lib/abstract_controller/caching/fragments.rb
+++ b/actionpack/lib/abstract_controller/caching/fragments.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 module AbstractController
   module Caching
     # Fragment caching is used for caching various blocks within
diff --git a/actionpack/lib/abstract_controller/callbacks.rb b/actionpack/lib/abstract_controller/callbacks.rb
index e4400e8704..c0ba1bff96 100644
--- a/actionpack/lib/abstract_controller/callbacks.rb
+++ b/actionpack/lib/abstract_controller/callbacks.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 module AbstractController
   # = Abstract Controller Callbacks
   #
diff --git a/actionpack/lib/abstract_controller/collector.rb b/actionpack/lib/abstract_controller/collector.rb
index 40ae5aa1ca..2910a69ca4 100644
--- a/actionpack/lib/abstract_controller/collector.rb
+++ b/actionpack/lib/abstract_controller/collector.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "action_dispatch/http/mime_type"
 
 module AbstractController
diff --git a/actionpack/lib/abstract_controller/error.rb b/actionpack/lib/abstract_controller/error.rb
index 7fafce4dd4..450a6fc9df 100644
--- a/actionpack/lib/abstract_controller/error.rb
+++ b/actionpack/lib/abstract_controller/error.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 module AbstractController
   class Error < StandardError #:nodoc:
   end
diff --git a/actionpack/lib/abstract_controller/helpers.rb b/actionpack/lib/abstract_controller/helpers.rb
index 2e50637c39..6cd16b0286 100644
--- a/actionpack/lib/abstract_controller/helpers.rb
+++ b/actionpack/lib/abstract_controller/helpers.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "active_support/dependencies"
 
 module AbstractController
diff --git a/actionpack/lib/abstract_controller/logger.rb b/actionpack/lib/abstract_controller/logger.rb
index c31ea6c5b5..61df54fff2 100644
--- a/actionpack/lib/abstract_controller/logger.rb
+++ b/actionpack/lib/abstract_controller/logger.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "active_support/benchmarkable"
 
 module AbstractController
diff --git a/actionpack/lib/abstract_controller/railties/routes_helpers.rb b/actionpack/lib/abstract_controller/railties/routes_helpers.rb
index 14b574e322..0a6a5315b3 100644
--- a/actionpack/lib/abstract_controller/railties/routes_helpers.rb
+++ b/actionpack/lib/abstract_controller/railties/routes_helpers.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 module AbstractController
   module Railties
     module RoutesHelpers
diff --git a/actionpack/lib/abstract_controller/rendering.rb b/actionpack/lib/abstract_controller/rendering.rb
index 54af938a93..b822d36e72 100644
--- a/actionpack/lib/abstract_controller/rendering.rb
+++ b/actionpack/lib/abstract_controller/rendering.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_controller/error"
 require "action_view"
 require "action_view/view_paths"
diff --git a/actionpack/lib/abstract_controller/translation.rb b/actionpack/lib/abstract_controller/translation.rb
index e4ac95df50..2cfc8d1484 100644
--- a/actionpack/lib/abstract_controller/translation.rb
+++ b/actionpack/lib/abstract_controller/translation.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 module AbstractController
   module Translation
     # Delegates to <tt>I18n.translate</tt>. Also aliased as <tt>t</tt>.
diff --git a/actionpack/lib/abstract_controller/url_for.rb b/actionpack/lib/abstract_controller/url_for.rb
index 72d07b0927..ddde3eacc2 100644
--- a/actionpack/lib/abstract_controller/url_for.rb
+++ b/actionpack/lib/abstract_controller/url_for.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 module AbstractController
   # Includes +url_for+ into the host class (e.g. an abstract controller or mailer). The class
   # has to provide a +RouteSet+ by implementing the <tt>_routes</tt> methods. Otherwise, an
diff --git a/actionpack/lib/action_controller.rb b/actionpack/lib/action_controller.rb
index 50f20aa789..806797bc50 100644
--- a/actionpack/lib/action_controller.rb
+++ b/actionpack/lib/action_controller.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "active_support/rails"
 require "abstract_controller"
 require "action_dispatch"
diff --git a/actionpack/lib/action_controller/api.rb b/actionpack/lib/action_controller/api.rb
index 94698df730..3060afd1f8 100644
--- a/actionpack/lib/action_controller/api.rb
+++ b/actionpack/lib/action_controller/api.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "action_view"
 require "action_controller"
 require "action_controller/log_subscriber"
diff --git a/actionpack/lib/action_controller/api/api_rendering.rb b/actionpack/lib/action_controller/api/api_rendering.rb
index 3a08d28c39..5ff11cf855 100644
--- a/actionpack/lib/action_controller/api/api_rendering.rb
+++ b/actionpack/lib/action_controller/api/api_rendering.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 module ActionController
   module ApiRendering
     extend ActiveSupport::Concern
diff --git a/actionpack/lib/action_controller/base.rb b/actionpack/lib/action_controller/base.rb
index 8c2b111f89..ff9e6702dc 100644
--- a/actionpack/lib/action_controller/base.rb
+++ b/actionpack/lib/action_controller/base.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "action_view"
 require "action_controller/log_subscriber"
 require "action_controller/metal/params_wrapper"
diff --git a/actionpack/lib/action_controller/caching.rb b/actionpack/lib/action_controller/caching.rb
index 954265ad97..86c1194ce0 100644
--- a/actionpack/lib/action_controller/caching.rb
+++ b/actionpack/lib/action_controller/caching.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 module ActionController
   # \Caching is a cheap way of speeding up slow applications by keeping the result of
   # calculations, renderings, and database calls around for subsequent requests.
diff --git a/actionpack/lib/action_controller/form_builder.rb b/actionpack/lib/action_controller/form_builder.rb
index f2656ca894..f636c81829 100644
--- a/actionpack/lib/action_controller/form_builder.rb
+++ b/actionpack/lib/action_controller/form_builder.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 module ActionController
   # Override the default form builder for all views rendered by this
   # controller and any of its descendants. Accepts a subclass of
diff --git a/actionpack/lib/action_controller/log_subscriber.rb b/actionpack/lib/action_controller/log_subscriber.rb
index d00fcbcd13..a2abc2356f 100644
--- a/actionpack/lib/action_controller/log_subscriber.rb
+++ b/actionpack/lib/action_controller/log_subscriber.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 module ActionController
   class LogSubscriber < ActiveSupport::LogSubscriber
     INTERNAL_PARAMS = %w(controller action format _method only_path)
diff --git a/actionpack/lib/action_controller/metal.rb b/actionpack/lib/action_controller/metal.rb
index 96c708f45a..5d9983eb49 100644
--- a/actionpack/lib/action_controller/metal.rb
+++ b/actionpack/lib/action_controller/metal.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "active_support/core_ext/array/extract_options"
 require "action_dispatch/middleware/stack"
 require "action_dispatch/http/request"
diff --git a/actionpack/lib/action_controller/metal/basic_implicit_render.rb b/actionpack/lib/action_controller/metal/basic_implicit_render.rb
index cef65a362c..b993a6afdf 100644
--- a/actionpack/lib/action_controller/metal/basic_implicit_render.rb
+++ b/actionpack/lib/action_controller/metal/basic_implicit_render.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 module ActionController
   module BasicImplicitRender # :nodoc:
     def send_action(method, *args)
diff --git a/actionpack/lib/action_controller/metal/conditional_get.rb b/actionpack/lib/action_controller/metal/conditional_get.rb
index 0525252c7c..cbf87d2ec9 100644
--- a/actionpack/lib/action_controller/metal/conditional_get.rb
+++ b/actionpack/lib/action_controller/metal/conditional_get.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "active_support/core_ext/hash/keys"
 
 module ActionController
diff --git a/actionpack/lib/action_controller/metal/cookies.rb b/actionpack/lib/action_controller/metal/cookies.rb
index 44925641a1..6616d9665e 100644
--- a/actionpack/lib/action_controller/metal/cookies.rb
+++ b/actionpack/lib/action_controller/metal/cookies.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 module ActionController #:nodoc:
   module Cookies
     extend ActiveSupport::Concern
diff --git a/actionpack/lib/action_controller/metal/data_streaming.rb b/actionpack/lib/action_controller/metal/data_streaming.rb
index 731e03e2fc..333efcf6aa 100644
--- a/actionpack/lib/action_controller/metal/data_streaming.rb
+++ b/actionpack/lib/action_controller/metal/data_streaming.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "action_controller/metal/exceptions"
 
 module ActionController #:nodoc:
diff --git a/actionpack/lib/action_controller/metal/etag_with_flash.rb b/actionpack/lib/action_controller/metal/etag_with_flash.rb
index 7bd338bd7c..f5f9c6267a 100644
--- a/actionpack/lib/action_controller/metal/etag_with_flash.rb
+++ b/actionpack/lib/action_controller/metal/etag_with_flash.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 module ActionController
   # When you're using the flash, it's generally used as a conditional on the view.
   # This means the content of the view depends on the flash. Which in turn means
diff --git a/actionpack/lib/action_controller/metal/etag_with_template_digest.rb b/actionpack/lib/action_controller/metal/etag_with_template_digest.rb
index 69c3979a0e..4c563d5072 100644
--- a/actionpack/lib/action_controller/metal/etag_with_template_digest.rb
+++ b/actionpack/lib/action_controller/metal/etag_with_template_digest.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 module ActionController
   # When our views change, they should bubble up into HTTP cache freshness
   # and bust browser caches. So the template digest for the current action
diff --git a/actionpack/lib/action_controller/metal/exceptions.rb b/actionpack/lib/action_controller/metal/exceptions.rb
index 175dd9eb9e..9bff006e2b 100644
--- a/actionpack/lib/action_controller/metal/exceptions.rb
+++ b/actionpack/lib/action_controller/metal/exceptions.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 module ActionController
   class ActionControllerError < StandardError #:nodoc:
   end
diff --git a/actionpack/lib/action_controller/metal/flash.rb b/actionpack/lib/action_controller/metal/flash.rb
index 24d1097ebe..e0708a9421 100644
--- a/actionpack/lib/action_controller/metal/flash.rb
+++ b/actionpack/lib/action_controller/metal/flash.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 module ActionController #:nodoc:
   module Flash
     extend ActiveSupport::Concern
diff --git a/actionpack/lib/action_controller/metal/force_ssl.rb b/actionpack/lib/action_controller/metal/force_ssl.rb
index 73e67573ca..99daa20d1c 100644
--- a/actionpack/lib/action_controller/metal/force_ssl.rb
+++ b/actionpack/lib/action_controller/metal/force_ssl.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "active_support/core_ext/hash/except"
 require "active_support/core_ext/hash/slice"
 
diff --git a/actionpack/lib/action_controller/metal/head.rb b/actionpack/lib/action_controller/metal/head.rb
index 0c50894bce..33a1e4d70f 100644
--- a/actionpack/lib/action_controller/metal/head.rb
+++ b/actionpack/lib/action_controller/metal/head.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 module ActionController
   module Head
     # Returns a response that has no content (merely headers). The options
diff --git a/actionpack/lib/action_controller/metal/helpers.rb b/actionpack/lib/action_controller/metal/helpers.rb
index 913a4b9a04..ad3aaf4232 100644
--- a/actionpack/lib/action_controller/metal/helpers.rb
+++ b/actionpack/lib/action_controller/metal/helpers.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 module ActionController
   # The \Rails framework provides a large number of helpers for working with assets, dates, forms,
   # numbers and model objects, to name a few. These helpers are available to all templates
diff --git a/actionpack/lib/action_controller/metal/http_authentication.rb b/actionpack/lib/action_controller/metal/http_authentication.rb
index d8bc895265..1d38e3504a 100644
--- a/actionpack/lib/action_controller/metal/http_authentication.rb
+++ b/actionpack/lib/action_controller/metal/http_authentication.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "base64"
 require "active_support/security_utils"
 
diff --git a/actionpack/lib/action_controller/metal/implicit_render.rb b/actionpack/lib/action_controller/metal/implicit_render.rb
index eeb27f99f4..3cfbf01805 100644
--- a/actionpack/lib/action_controller/metal/implicit_render.rb
+++ b/actionpack/lib/action_controller/metal/implicit_render.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 module ActionController
   # Handles implicit rendering for a controller action that does not
   # explicitly respond with +render+, +respond_to+, +redirect+, or +head+.
diff --git a/actionpack/lib/action_controller/metal/instrumentation.rb b/actionpack/lib/action_controller/metal/instrumentation.rb
index 2485d27cec..d9be52bc71 100644
--- a/actionpack/lib/action_controller/metal/instrumentation.rb
+++ b/actionpack/lib/action_controller/metal/instrumentation.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "benchmark"
 require "abstract_controller/logger"
 
diff --git a/actionpack/lib/action_controller/metal/live.rb b/actionpack/lib/action_controller/metal/live.rb
index a607ee2309..4bd59ea482 100644
--- a/actionpack/lib/action_controller/metal/live.rb
+++ b/actionpack/lib/action_controller/metal/live.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "action_dispatch/http/response"
 require "delegate"
 require "active_support/json"
diff --git a/actionpack/lib/action_controller/metal/mime_responds.rb b/actionpack/lib/action_controller/metal/mime_responds.rb
index 96bd548268..ca4bb100d3 100644
--- a/actionpack/lib/action_controller/metal/mime_responds.rb
+++ b/actionpack/lib/action_controller/metal/mime_responds.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_controller/collector"
 
 module ActionController #:nodoc:
diff --git a/actionpack/lib/action_controller/metal/parameter_encoding.rb b/actionpack/lib/action_controller/metal/parameter_encoding.rb
index ecc691619e..b16c2f636a 100644
--- a/actionpack/lib/action_controller/metal/parameter_encoding.rb
+++ b/actionpack/lib/action_controller/metal/parameter_encoding.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 module ActionController
   # Specify binary encoding for parameters for a given action.
   module ParameterEncoding
diff --git a/actionpack/lib/action_controller/metal/params_wrapper.rb b/actionpack/lib/action_controller/metal/params_wrapper.rb
index 44151c9f71..86919aebf5 100644
--- a/actionpack/lib/action_controller/metal/params_wrapper.rb
+++ b/actionpack/lib/action_controller/metal/params_wrapper.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "active_support/core_ext/hash/slice"
 require "active_support/core_ext/hash/except"
 require "active_support/core_ext/module/anonymous"
diff --git a/actionpack/lib/action_controller/metal/redirecting.rb b/actionpack/lib/action_controller/metal/redirecting.rb
index fdfe82f96b..c021699b0d 100644
--- a/actionpack/lib/action_controller/metal/redirecting.rb
+++ b/actionpack/lib/action_controller/metal/redirecting.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 module ActionController
   module Redirecting
     extend ActiveSupport::Concern
diff --git a/actionpack/lib/action_controller/metal/renderers.rb b/actionpack/lib/action_controller/metal/renderers.rb
index 23c21b0501..79314fa505 100644
--- a/actionpack/lib/action_controller/metal/renderers.rb
+++ b/actionpack/lib/action_controller/metal/renderers.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "set"
 
 module ActionController
diff --git a/actionpack/lib/action_controller/metal/rendering.rb b/actionpack/lib/action_controller/metal/rendering.rb
index 67f207afc2..ff75c558ee 100644
--- a/actionpack/lib/action_controller/metal/rendering.rb
+++ b/actionpack/lib/action_controller/metal/rendering.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "active_support/core_ext/string/filters"
 
 module ActionController
diff --git a/actionpack/lib/action_controller/metal/request_forgery_protection.rb b/actionpack/lib/action_controller/metal/request_forgery_protection.rb
index 5051c02a62..0616840a56 100644
--- a/actionpack/lib/action_controller/metal/request_forgery_protection.rb
+++ b/actionpack/lib/action_controller/metal/request_forgery_protection.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "rack/session/abstract/id"
 require "action_controller/metal/exceptions"
 require "active_support/security_utils"
diff --git a/actionpack/lib/action_controller/metal/rescue.rb b/actionpack/lib/action_controller/metal/rescue.rb
index 25757938f5..35e3cae985 100644
--- a/actionpack/lib/action_controller/metal/rescue.rb
+++ b/actionpack/lib/action_controller/metal/rescue.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 module ActionController #:nodoc:
   # This module is responsible for providing `rescue_from` helpers
   # to controllers and configuring when detailed exceptions must be
diff --git a/actionpack/lib/action_controller/metal/streaming.rb b/actionpack/lib/action_controller/metal/streaming.rb
index 58cf60ad2a..407ae95086 100644
--- a/actionpack/lib/action_controller/metal/streaming.rb
+++ b/actionpack/lib/action_controller/metal/streaming.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "rack/chunked"
 
 module ActionController #:nodoc:
diff --git a/actionpack/lib/action_controller/metal/strong_parameters.rb b/actionpack/lib/action_controller/metal/strong_parameters.rb
index cd6a0c0b98..e0b521367e 100644
--- a/actionpack/lib/action_controller/metal/strong_parameters.rb
+++ b/actionpack/lib/action_controller/metal/strong_parameters.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "active_support/core_ext/hash/indifferent_access"
 require "active_support/core_ext/hash/transform_values"
 require "active_support/core_ext/array/wrap"
diff --git a/actionpack/lib/action_controller/metal/testing.rb b/actionpack/lib/action_controller/metal/testing.rb
index 9bb416178a..4fd0fb40de 100644
--- a/actionpack/lib/action_controller/metal/testing.rb
+++ b/actionpack/lib/action_controller/metal/testing.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 module ActionController
   module Testing
     extend ActiveSupport::Concern
diff --git a/actionpack/lib/action_controller/metal/url_for.rb b/actionpack/lib/action_controller/metal/url_for.rb
index 21ed5b4ec8..068ad00130 100644
--- a/actionpack/lib/action_controller/metal/url_for.rb
+++ b/actionpack/lib/action_controller/metal/url_for.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 module ActionController
   # Includes +url_for+ into the host class. The class has to provide a +RouteSet+ by implementing
   # the <tt>_routes</tt> method. Otherwise, an exception will be raised.
diff --git a/actionpack/lib/action_controller/railtie.rb b/actionpack/lib/action_controller/railtie.rb
index fadfc8de60..0eec7b383c 100644
--- a/actionpack/lib/action_controller/railtie.rb
+++ b/actionpack/lib/action_controller/railtie.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "rails"
 require "action_controller"
 require "action_dispatch/railtie"
diff --git a/actionpack/lib/action_controller/railties/helpers.rb b/actionpack/lib/action_controller/railties/helpers.rb
index 3985c6b273..4417ebdedb 100644
--- a/actionpack/lib/action_controller/railties/helpers.rb
+++ b/actionpack/lib/action_controller/railties/helpers.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 module ActionController
   module Railties
     module Helpers
diff --git a/actionpack/lib/action_controller/renderer.rb b/actionpack/lib/action_controller/renderer.rb
index cbb719d8b2..c35a778d46 100644
--- a/actionpack/lib/action_controller/renderer.rb
+++ b/actionpack/lib/action_controller/renderer.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "active_support/core_ext/hash/keys"
 
 module ActionController
diff --git a/actionpack/lib/action_controller/template_assertions.rb b/actionpack/lib/action_controller/template_assertions.rb
index 0179f4afcd..086c42fea7 100644
--- a/actionpack/lib/action_controller/template_assertions.rb
+++ b/actionpack/lib/action_controller/template_assertions.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 module ActionController
   module TemplateAssertions
     def assert_template(options = {}, message = nil)
diff --git a/actionpack/lib/action_controller/test_case.rb b/actionpack/lib/action_controller/test_case.rb
index bc42d50205..9df9381be8 100644
--- a/actionpack/lib/action_controller/test_case.rb
+++ b/actionpack/lib/action_controller/test_case.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "rack/session/abstract/id"
 require "active_support/core_ext/hash/conversions"
 require "active_support/core_ext/object/to_query"
diff --git a/actionpack/lib/action_dispatch.rb b/actionpack/lib/action_dispatch.rb
index 303790e96d..1f3f6d615a 100644
--- a/actionpack/lib/action_dispatch.rb
+++ b/actionpack/lib/action_dispatch.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 #--
 # Copyright (c) 2004-2017 David Heinemeier Hansson
 #
diff --git a/actionpack/lib/action_dispatch/http/cache.rb b/actionpack/lib/action_dispatch/http/cache.rb
index 985e0fb972..2cbb3facb7 100644
--- a/actionpack/lib/action_dispatch/http/cache.rb
+++ b/actionpack/lib/action_dispatch/http/cache.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 module ActionDispatch
   module Http
     module Cache
diff --git a/actionpack/lib/action_dispatch/http/filter_parameters.rb b/actionpack/lib/action_dispatch/http/filter_parameters.rb
index 077ab2561f..872c2cb9d3 100644
--- a/actionpack/lib/action_dispatch/http/filter_parameters.rb
+++ b/actionpack/lib/action_dispatch/http/filter_parameters.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "action_dispatch/http/parameter_filter"
 
 module ActionDispatch
diff --git a/actionpack/lib/action_dispatch/http/filter_redirect.rb b/actionpack/lib/action_dispatch/http/filter_redirect.rb
index fc3c44582a..91f1ebeb79 100644
--- a/actionpack/lib/action_dispatch/http/filter_redirect.rb
+++ b/actionpack/lib/action_dispatch/http/filter_redirect.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 module ActionDispatch
   module Http
     module FilterRedirect
diff --git a/actionpack/lib/action_dispatch/http/headers.rb b/actionpack/lib/action_dispatch/http/headers.rb
index 3c03976f03..59323d26d6 100644
--- a/actionpack/lib/action_dispatch/http/headers.rb
+++ b/actionpack/lib/action_dispatch/http/headers.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 module ActionDispatch
   module Http
     # Provides access to the request's HTTP headers from the environment.
diff --git a/actionpack/lib/action_dispatch/http/mime_negotiation.rb b/actionpack/lib/action_dispatch/http/mime_negotiation.rb
index 5994a01c78..9e97b14170 100644
--- a/actionpack/lib/action_dispatch/http/mime_negotiation.rb
+++ b/actionpack/lib/action_dispatch/http/mime_negotiation.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "active_support/core_ext/module/attribute_accessors"
 
 module ActionDispatch
diff --git a/actionpack/lib/action_dispatch/http/mime_type.rb b/actionpack/lib/action_dispatch/http/mime_type.rb
index 74a3afab44..7dc3a175fb 100644
--- a/actionpack/lib/action_dispatch/http/mime_type.rb
+++ b/actionpack/lib/action_dispatch/http/mime_type.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 # -*- frozen-string-literal: true -*-
 
 require "singleton"
diff --git a/actionpack/lib/action_dispatch/http/mime_types.rb b/actionpack/lib/action_dispatch/http/mime_types.rb
index 8b04174f1f..9ddb560d98 100644
--- a/actionpack/lib/action_dispatch/http/mime_types.rb
+++ b/actionpack/lib/action_dispatch/http/mime_types.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 # Build list of Mime types for HTTP responses
 # http://www.iana.org/assignments/media-types/
 
diff --git a/actionpack/lib/action_dispatch/http/parameter_filter.rb b/actionpack/lib/action_dispatch/http/parameter_filter.rb
index 1d2b4b902b..8a53407323 100644
--- a/actionpack/lib/action_dispatch/http/parameter_filter.rb
+++ b/actionpack/lib/action_dispatch/http/parameter_filter.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "active_support/core_ext/object/duplicable"
 
 module ActionDispatch
diff --git a/actionpack/lib/action_dispatch/http/parameters.rb b/actionpack/lib/action_dispatch/http/parameters.rb
index 7c585dbe68..9723d78dfc 100644
--- a/actionpack/lib/action_dispatch/http/parameters.rb
+++ b/actionpack/lib/action_dispatch/http/parameters.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 module ActionDispatch
   module Http
     module Parameters
diff --git a/actionpack/lib/action_dispatch/http/rack_cache.rb b/actionpack/lib/action_dispatch/http/rack_cache.rb
index 003ae4029d..dff27a568f 100644
--- a/actionpack/lib/action_dispatch/http/rack_cache.rb
+++ b/actionpack/lib/action_dispatch/http/rack_cache.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "rack/cache"
 require "rack/cache/context"
 require "active_support/cache"
diff --git a/actionpack/lib/action_dispatch/http/request.rb b/actionpack/lib/action_dispatch/http/request.rb
index 6d42404a98..bd3d7fb5b8 100644
--- a/actionpack/lib/action_dispatch/http/request.rb
+++ b/actionpack/lib/action_dispatch/http/request.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "stringio"
 
 require "active_support/inflector"
diff --git a/actionpack/lib/action_dispatch/http/response.rb b/actionpack/lib/action_dispatch/http/response.rb
index 3c91677d55..213e7098c1 100644
--- a/actionpack/lib/action_dispatch/http/response.rb
+++ b/actionpack/lib/action_dispatch/http/response.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "active_support/core_ext/module/attribute_accessors"
 require "action_dispatch/http/filter_redirect"
 require "action_dispatch/http/cache"
diff --git a/actionpack/lib/action_dispatch/http/upload.rb b/actionpack/lib/action_dispatch/http/upload.rb
index 225272d66e..03def91070 100644
--- a/actionpack/lib/action_dispatch/http/upload.rb
+++ b/actionpack/lib/action_dispatch/http/upload.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 module ActionDispatch
   module Http
     # Models uploaded files.
diff --git a/actionpack/lib/action_dispatch/http/url.rb b/actionpack/lib/action_dispatch/http/url.rb
index f902fe36e0..513bf9eedc 100644
--- a/actionpack/lib/action_dispatch/http/url.rb
+++ b/actionpack/lib/action_dispatch/http/url.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "active_support/core_ext/module/attribute_accessors"
 
 module ActionDispatch
diff --git a/actionpack/lib/action_dispatch/journey.rb b/actionpack/lib/action_dispatch/journey.rb
index d1cfc51f3e..d93d9473ed 100644
--- a/actionpack/lib/action_dispatch/journey.rb
+++ b/actionpack/lib/action_dispatch/journey.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "action_dispatch/journey/router"
 require "action_dispatch/journey/gtg/builder"
 require "action_dispatch/journey/gtg/simulator"
diff --git a/actionpack/lib/action_dispatch/journey/formatter.rb b/actionpack/lib/action_dispatch/journey/formatter.rb
index 326f4e52f9..a6b16c83a3 100644
--- a/actionpack/lib/action_dispatch/journey/formatter.rb
+++ b/actionpack/lib/action_dispatch/journey/formatter.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "action_controller/metal/exceptions"
 
 module ActionDispatch
diff --git a/actionpack/lib/action_dispatch/journey/gtg/builder.rb b/actionpack/lib/action_dispatch/journey/gtg/builder.rb
index 0f8bed89bf..ed8b994408 100644
--- a/actionpack/lib/action_dispatch/journey/gtg/builder.rb
+++ b/actionpack/lib/action_dispatch/journey/gtg/builder.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "action_dispatch/journey/gtg/transition_table"
 
 module ActionDispatch
diff --git a/actionpack/lib/action_dispatch/journey/gtg/simulator.rb b/actionpack/lib/action_dispatch/journey/gtg/simulator.rb
index 62f052ced6..240536dd7c 100644
--- a/actionpack/lib/action_dispatch/journey/gtg/simulator.rb
+++ b/actionpack/lib/action_dispatch/journey/gtg/simulator.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "strscan"
 
 module ActionDispatch
diff --git a/actionpack/lib/action_dispatch/journey/gtg/transition_table.rb b/actionpack/lib/action_dispatch/journey/gtg/transition_table.rb
index 45aff287b1..b99a228c32 100644
--- a/actionpack/lib/action_dispatch/journey/gtg/transition_table.rb
+++ b/actionpack/lib/action_dispatch/journey/gtg/transition_table.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "action_dispatch/journey/nfa/dot"
 
 module ActionDispatch
diff --git a/actionpack/lib/action_dispatch/journey/nfa/builder.rb b/actionpack/lib/action_dispatch/journey/nfa/builder.rb
index 532f765094..0796d98cfd 100644
--- a/actionpack/lib/action_dispatch/journey/nfa/builder.rb
+++ b/actionpack/lib/action_dispatch/journey/nfa/builder.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "action_dispatch/journey/nfa/transition_table"
 require "action_dispatch/journey/gtg/transition_table"
 
diff --git a/actionpack/lib/action_dispatch/journey/nfa/dot.rb b/actionpack/lib/action_dispatch/journey/nfa/dot.rb
index 8119e5d9da..8b1d40149b 100644
--- a/actionpack/lib/action_dispatch/journey/nfa/dot.rb
+++ b/actionpack/lib/action_dispatch/journey/nfa/dot.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 module ActionDispatch
   module Journey # :nodoc:
     module NFA # :nodoc:
diff --git a/actionpack/lib/action_dispatch/journey/nfa/simulator.rb b/actionpack/lib/action_dispatch/journey/nfa/simulator.rb
index 324d0eed15..284b734b39 100644
--- a/actionpack/lib/action_dispatch/journey/nfa/simulator.rb
+++ b/actionpack/lib/action_dispatch/journey/nfa/simulator.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "strscan"
 
 module ActionDispatch
diff --git a/actionpack/lib/action_dispatch/journey/nfa/transition_table.rb b/actionpack/lib/action_dispatch/journey/nfa/transition_table.rb
index 543a670da0..9cdb4a2496 100644
--- a/actionpack/lib/action_dispatch/journey/nfa/transition_table.rb
+++ b/actionpack/lib/action_dispatch/journey/nfa/transition_table.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "action_dispatch/journey/nfa/dot"
 
 module ActionDispatch
diff --git a/actionpack/lib/action_dispatch/journey/nodes/node.rb b/actionpack/lib/action_dispatch/journey/nodes/node.rb
index 0d874a84c9..6f2cd48d93 100644
--- a/actionpack/lib/action_dispatch/journey/nodes/node.rb
+++ b/actionpack/lib/action_dispatch/journey/nodes/node.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "action_dispatch/journey/visitors"
 
 module ActionDispatch
diff --git a/actionpack/lib/action_dispatch/journey/parser_extras.rb b/actionpack/lib/action_dispatch/journey/parser_extras.rb
index 4c7e82d93c..8f1a12f286 100644
--- a/actionpack/lib/action_dispatch/journey/parser_extras.rb
+++ b/actionpack/lib/action_dispatch/journey/parser_extras.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "action_dispatch/journey/scanner"
 require "action_dispatch/journey/nodes/node"
 
diff --git a/actionpack/lib/action_dispatch/journey/path/pattern.rb b/actionpack/lib/action_dispatch/journey/path/pattern.rb
index cf0108ec32..d63eecb600 100644
--- a/actionpack/lib/action_dispatch/journey/path/pattern.rb
+++ b/actionpack/lib/action_dispatch/journey/path/pattern.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 module ActionDispatch
   module Journey # :nodoc:
     module Path # :nodoc:
diff --git a/actionpack/lib/action_dispatch/journey/route.rb b/actionpack/lib/action_dispatch/journey/route.rb
index 0acbac1d9d..38aa45f942 100644
--- a/actionpack/lib/action_dispatch/journey/route.rb
+++ b/actionpack/lib/action_dispatch/journey/route.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 module ActionDispatch
   # :stopdoc:
   module Journey
diff --git a/actionpack/lib/action_dispatch/journey/router.rb b/actionpack/lib/action_dispatch/journey/router.rb
index d55e1399e4..f55b187cc8 100644
--- a/actionpack/lib/action_dispatch/journey/router.rb
+++ b/actionpack/lib/action_dispatch/journey/router.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "action_dispatch/journey/router/utils"
 require "action_dispatch/journey/routes"
 require "action_dispatch/journey/formatter"
diff --git a/actionpack/lib/action_dispatch/journey/router/utils.rb b/actionpack/lib/action_dispatch/journey/router/utils.rb
index 6d400f3364..5d9563ee1a 100644
--- a/actionpack/lib/action_dispatch/journey/router/utils.rb
+++ b/actionpack/lib/action_dispatch/journey/router/utils.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 module ActionDispatch
   module Journey # :nodoc:
     class Router # :nodoc:
diff --git a/actionpack/lib/action_dispatch/journey/routes.rb b/actionpack/lib/action_dispatch/journey/routes.rb
index f7b009109e..bee2140c5f 100644
--- a/actionpack/lib/action_dispatch/journey/routes.rb
+++ b/actionpack/lib/action_dispatch/journey/routes.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 module ActionDispatch
   module Journey # :nodoc:
     # The Routing table. Contains all routes for a system. Routes can be
diff --git a/actionpack/lib/action_dispatch/journey/visitors.rb b/actionpack/lib/action_dispatch/journey/visitors.rb
index 335797f4b9..6670079241 100644
--- a/actionpack/lib/action_dispatch/journey/visitors.rb
+++ b/actionpack/lib/action_dispatch/journey/visitors.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 module ActionDispatch
   # :stopdoc:
   module Journey
diff --git a/actionpack/lib/action_dispatch/middleware/callbacks.rb b/actionpack/lib/action_dispatch/middleware/callbacks.rb
index ff129cf96a..cc3b344d72 100644
--- a/actionpack/lib/action_dispatch/middleware/callbacks.rb
+++ b/actionpack/lib/action_dispatch/middleware/callbacks.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 module ActionDispatch
   # Provides callbacks to be executed before and after dispatching the request.
   class Callbacks
diff --git a/actionpack/lib/action_dispatch/middleware/cookies.rb b/actionpack/lib/action_dispatch/middleware/cookies.rb
index 533925ebe1..6a9d54a32a 100644
--- a/actionpack/lib/action_dispatch/middleware/cookies.rb
+++ b/actionpack/lib/action_dispatch/middleware/cookies.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "active_support/core_ext/hash/keys"
 require "active_support/key_generator"
 require "active_support/message_verifier"
diff --git a/actionpack/lib/action_dispatch/middleware/debug_exceptions.rb b/actionpack/lib/action_dispatch/middleware/debug_exceptions.rb
index 336a775880..fe01c55116 100644
--- a/actionpack/lib/action_dispatch/middleware/debug_exceptions.rb
+++ b/actionpack/lib/action_dispatch/middleware/debug_exceptions.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "action_dispatch/http/request"
 require "action_dispatch/middleware/exception_wrapper"
 require "action_dispatch/routing/inspector"
diff --git a/actionpack/lib/action_dispatch/middleware/debug_locks.rb b/actionpack/lib/action_dispatch/middleware/debug_locks.rb
index 74b952528e..600b0a51b1 100644
--- a/actionpack/lib/action_dispatch/middleware/debug_locks.rb
+++ b/actionpack/lib/action_dispatch/middleware/debug_locks.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 module ActionDispatch
   # This middleware can be used to diagnose deadlocks in the autoload interlock.
   #
diff --git a/actionpack/lib/action_dispatch/middleware/exception_wrapper.rb b/actionpack/lib/action_dispatch/middleware/exception_wrapper.rb
index 08b4541d24..47ed09ecb5 100644
--- a/actionpack/lib/action_dispatch/middleware/exception_wrapper.rb
+++ b/actionpack/lib/action_dispatch/middleware/exception_wrapper.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "active_support/core_ext/module/attribute_accessors"
 require "rack/utils"
 
diff --git a/actionpack/lib/action_dispatch/middleware/executor.rb b/actionpack/lib/action_dispatch/middleware/executor.rb
index 3d43f97a2b..7423d59119 100644
--- a/actionpack/lib/action_dispatch/middleware/executor.rb
+++ b/actionpack/lib/action_dispatch/middleware/executor.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "rack/body_proxy"
 
 module ActionDispatch
diff --git a/actionpack/lib/action_dispatch/middleware/flash.rb b/actionpack/lib/action_dispatch/middleware/flash.rb
index 6b29ce63ba..3fe80cf03d 100644
--- a/actionpack/lib/action_dispatch/middleware/flash.rb
+++ b/actionpack/lib/action_dispatch/middleware/flash.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "active_support/core_ext/hash/keys"
 
 module ActionDispatch
diff --git a/actionpack/lib/action_dispatch/middleware/public_exceptions.rb b/actionpack/lib/action_dispatch/middleware/public_exceptions.rb
index 46f0f675b9..e37416d957 100644
--- a/actionpack/lib/action_dispatch/middleware/public_exceptions.rb
+++ b/actionpack/lib/action_dispatch/middleware/public_exceptions.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 module ActionDispatch
   # When called, this middleware renders an error page. By default if an HTML
   # response is expected it will render static error pages from the `/public`
diff --git a/actionpack/lib/action_dispatch/middleware/reloader.rb b/actionpack/lib/action_dispatch/middleware/reloader.rb
index 6d64b1424b..989d6c3cd7 100644
--- a/actionpack/lib/action_dispatch/middleware/reloader.rb
+++ b/actionpack/lib/action_dispatch/middleware/reloader.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 module ActionDispatch
   # ActionDispatch::Reloader wraps the request with callbacks provided by ActiveSupport::Reloader
   # callbacks, intended to assist with code reloading during development.
diff --git a/actionpack/lib/action_dispatch/middleware/remote_ip.rb b/actionpack/lib/action_dispatch/middleware/remote_ip.rb
index 53d5a4918c..b5decc98b5 100644
--- a/actionpack/lib/action_dispatch/middleware/remote_ip.rb
+++ b/actionpack/lib/action_dispatch/middleware/remote_ip.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "ipaddr"
 
 module ActionDispatch
diff --git a/actionpack/lib/action_dispatch/middleware/request_id.rb b/actionpack/lib/action_dispatch/middleware/request_id.rb
index 1925ffd9dd..6ac846e10b 100644
--- a/actionpack/lib/action_dispatch/middleware/request_id.rb
+++ b/actionpack/lib/action_dispatch/middleware/request_id.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "securerandom"
 require "active_support/core_ext/string/access"
 
diff --git a/actionpack/lib/action_dispatch/middleware/session/abstract_store.rb b/actionpack/lib/action_dispatch/middleware/session/abstract_store.rb
index 21ccf5a097..6af03da443 100644
--- a/actionpack/lib/action_dispatch/middleware/session/abstract_store.rb
+++ b/actionpack/lib/action_dispatch/middleware/session/abstract_store.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "rack/utils"
 require "rack/request"
 require "rack/session/abstract/id"
diff --git a/actionpack/lib/action_dispatch/middleware/session/cache_store.rb b/actionpack/lib/action_dispatch/middleware/session/cache_store.rb
index 71274bc13a..456febcfba 100644
--- a/actionpack/lib/action_dispatch/middleware/session/cache_store.rb
+++ b/actionpack/lib/action_dispatch/middleware/session/cache_store.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "action_dispatch/middleware/session/abstract_store"
 
 module ActionDispatch
diff --git a/actionpack/lib/action_dispatch/middleware/session/cookie_store.rb b/actionpack/lib/action_dispatch/middleware/session/cookie_store.rb
index 57d325a9d8..f71997a6d7 100644
--- a/actionpack/lib/action_dispatch/middleware/session/cookie_store.rb
+++ b/actionpack/lib/action_dispatch/middleware/session/cookie_store.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "active_support/core_ext/hash/keys"
 require "action_dispatch/middleware/session/abstract_store"
 require "rack/session/cookie"
diff --git a/actionpack/lib/action_dispatch/middleware/session/mem_cache_store.rb b/actionpack/lib/action_dispatch/middleware/session/mem_cache_store.rb
index ee2b1f26ad..977b4c7031 100644
--- a/actionpack/lib/action_dispatch/middleware/session/mem_cache_store.rb
+++ b/actionpack/lib/action_dispatch/middleware/session/mem_cache_store.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "action_dispatch/middleware/session/abstract_store"
 begin
   require "rack/session/dalli"
diff --git a/actionpack/lib/action_dispatch/middleware/show_exceptions.rb b/actionpack/lib/action_dispatch/middleware/show_exceptions.rb
index 5a99714ec2..5289b3cb87 100644
--- a/actionpack/lib/action_dispatch/middleware/show_exceptions.rb
+++ b/actionpack/lib/action_dispatch/middleware/show_exceptions.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "action_dispatch/http/request"
 require "action_dispatch/middleware/exception_wrapper"
 
diff --git a/actionpack/lib/action_dispatch/middleware/ssl.rb b/actionpack/lib/action_dispatch/middleware/ssl.rb
index 557721c301..36faf6a7c6 100644
--- a/actionpack/lib/action_dispatch/middleware/ssl.rb
+++ b/actionpack/lib/action_dispatch/middleware/ssl.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 module ActionDispatch
   # This middleware is added to the stack when `config.force_ssl = true`, and is passed
   # the options set in `config.ssl_options`. It does three jobs to enforce secure HTTP
diff --git a/actionpack/lib/action_dispatch/middleware/stack.rb b/actionpack/lib/action_dispatch/middleware/stack.rb
index 6949b31e75..66d07f57d5 100644
--- a/actionpack/lib/action_dispatch/middleware/stack.rb
+++ b/actionpack/lib/action_dispatch/middleware/stack.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "active_support/inflector/methods"
 require "active_support/dependencies"
 
diff --git a/actionpack/lib/action_dispatch/middleware/static.rb b/actionpack/lib/action_dispatch/middleware/static.rb
index fb99f13a1c..338e0d45a1 100644
--- a/actionpack/lib/action_dispatch/middleware/static.rb
+++ b/actionpack/lib/action_dispatch/middleware/static.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "rack/utils"
 require "active_support/core_ext/uri"
 
diff --git a/actionpack/lib/action_dispatch/railtie.rb b/actionpack/lib/action_dispatch/railtie.rb
index 7662e164b8..c865713b31 100644
--- a/actionpack/lib/action_dispatch/railtie.rb
+++ b/actionpack/lib/action_dispatch/railtie.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "action_dispatch"
 
 module ActionDispatch
diff --git a/actionpack/lib/action_dispatch/request/session.rb b/actionpack/lib/action_dispatch/request/session.rb
index 3547a8604f..4f9e2e62d3 100644
--- a/actionpack/lib/action_dispatch/request/session.rb
+++ b/actionpack/lib/action_dispatch/request/session.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "rack/session/abstract/id"
 
 module ActionDispatch
diff --git a/actionpack/lib/action_dispatch/request/utils.rb b/actionpack/lib/action_dispatch/request/utils.rb
index 4f79c4c21e..89c4d49e1a 100644
--- a/actionpack/lib/action_dispatch/request/utils.rb
+++ b/actionpack/lib/action_dispatch/request/utils.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 module ActionDispatch
   class Request
     class Utils # :nodoc:
diff --git a/actionpack/lib/action_dispatch/routing.rb b/actionpack/lib/action_dispatch/routing.rb
index 87dd1eba38..da0afa5e13 100644
--- a/actionpack/lib/action_dispatch/routing.rb
+++ b/actionpack/lib/action_dispatch/routing.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "active_support/core_ext/string/filters"
 
 module ActionDispatch
diff --git a/actionpack/lib/action_dispatch/routing/endpoint.rb b/actionpack/lib/action_dispatch/routing/endpoint.rb
index 88aa13c3e8..e2dbf8a2cd 100644
--- a/actionpack/lib/action_dispatch/routing/endpoint.rb
+++ b/actionpack/lib/action_dispatch/routing/endpoint.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 module ActionDispatch
   module Routing
     class Endpoint # :nodoc:
diff --git a/actionpack/lib/action_dispatch/routing/inspector.rb b/actionpack/lib/action_dispatch/routing/inspector.rb
index 9aa4b92df2..ba533d63d6 100644
--- a/actionpack/lib/action_dispatch/routing/inspector.rb
+++ b/actionpack/lib/action_dispatch/routing/inspector.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "delegate"
 require "active_support/core_ext/string/strip"
 
diff --git a/actionpack/lib/action_dispatch/routing/mapper.rb b/actionpack/lib/action_dispatch/routing/mapper.rb
index 88deee5f5e..1376469c2b 100644
--- a/actionpack/lib/action_dispatch/routing/mapper.rb
+++ b/actionpack/lib/action_dispatch/routing/mapper.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "active_support/core_ext/hash/slice"
 require "active_support/core_ext/enumerable"
 require "active_support/core_ext/array/extract_options"
diff --git a/actionpack/lib/action_dispatch/routing/polymorphic_routes.rb b/actionpack/lib/action_dispatch/routing/polymorphic_routes.rb
index e89ea8b21d..6c26e2198e 100644
--- a/actionpack/lib/action_dispatch/routing/polymorphic_routes.rb
+++ b/actionpack/lib/action_dispatch/routing/polymorphic_routes.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 module ActionDispatch
   module Routing
     # Polymorphic URL helpers are methods for smart resolution to a named route call when
diff --git a/actionpack/lib/action_dispatch/routing/redirection.rb b/actionpack/lib/action_dispatch/routing/redirection.rb
index 3bcb341758..a87dfa4037 100644
--- a/actionpack/lib/action_dispatch/routing/redirection.rb
+++ b/actionpack/lib/action_dispatch/routing/redirection.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "action_dispatch/http/request"
 require "active_support/core_ext/uri"
 require "active_support/core_ext/array/extract_options"
diff --git a/actionpack/lib/action_dispatch/routing/route_set.rb b/actionpack/lib/action_dispatch/routing/route_set.rb
index 68bd6d806b..ee692e1243 100644
--- a/actionpack/lib/action_dispatch/routing/route_set.rb
+++ b/actionpack/lib/action_dispatch/routing/route_set.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "action_dispatch/journey"
 require "active_support/core_ext/object/to_query"
 require "active_support/core_ext/hash/slice"
diff --git a/actionpack/lib/action_dispatch/routing/routes_proxy.rb b/actionpack/lib/action_dispatch/routing/routes_proxy.rb
index c1423f770f..996d40e911 100644
--- a/actionpack/lib/action_dispatch/routing/routes_proxy.rb
+++ b/actionpack/lib/action_dispatch/routing/routes_proxy.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "active_support/core_ext/array/extract_options"
 
 module ActionDispatch
diff --git a/actionpack/lib/action_dispatch/routing/url_for.rb b/actionpack/lib/action_dispatch/routing/url_for.rb
index a9bdefa775..deccd22f23 100644
--- a/actionpack/lib/action_dispatch/routing/url_for.rb
+++ b/actionpack/lib/action_dispatch/routing/url_for.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 module ActionDispatch
   module Routing
     # In <tt>config/routes.rb</tt> you define URL-to-controller mappings, but the reverse
diff --git a/actionpack/lib/action_dispatch/system_test_case.rb b/actionpack/lib/action_dispatch/system_test_case.rb
index c39a135ce0..11f2ff4384 100644
--- a/actionpack/lib/action_dispatch/system_test_case.rb
+++ b/actionpack/lib/action_dispatch/system_test_case.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "capybara/dsl"
 require "capybara/minitest"
 require "action_controller"
diff --git a/actionpack/lib/action_dispatch/system_testing/driver.rb b/actionpack/lib/action_dispatch/system_testing/driver.rb
index 1a027f2e23..2b4addde08 100644
--- a/actionpack/lib/action_dispatch/system_testing/driver.rb
+++ b/actionpack/lib/action_dispatch/system_testing/driver.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 module ActionDispatch
   module SystemTesting
     class Driver # :nodoc:
diff --git a/actionpack/lib/action_dispatch/system_testing/server.rb b/actionpack/lib/action_dispatch/system_testing/server.rb
index 89ca6944d9..b98a1deee9 100644
--- a/actionpack/lib/action_dispatch/system_testing/server.rb
+++ b/actionpack/lib/action_dispatch/system_testing/server.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "rack/handler/puma"
 
 module ActionDispatch
diff --git a/actionpack/lib/action_dispatch/system_testing/test_helpers/screenshot_helper.rb b/actionpack/lib/action_dispatch/system_testing/test_helpers/screenshot_helper.rb
index 859d68e475..40150c1fe5 100644
--- a/actionpack/lib/action_dispatch/system_testing/test_helpers/screenshot_helper.rb
+++ b/actionpack/lib/action_dispatch/system_testing/test_helpers/screenshot_helper.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 module ActionDispatch
   module SystemTesting
     module TestHelpers
diff --git a/actionpack/lib/action_dispatch/system_testing/test_helpers/setup_and_teardown.rb b/actionpack/lib/action_dispatch/system_testing/test_helpers/setup_and_teardown.rb
index f03f0d4299..7c45e165bc 100644
--- a/actionpack/lib/action_dispatch/system_testing/test_helpers/setup_and_teardown.rb
+++ b/actionpack/lib/action_dispatch/system_testing/test_helpers/setup_and_teardown.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 module ActionDispatch
   module SystemTesting
     module TestHelpers
diff --git a/actionpack/lib/action_dispatch/testing/assertion_response.rb b/actionpack/lib/action_dispatch/testing/assertion_response.rb
index c37726957e..869b98b480 100644
--- a/actionpack/lib/action_dispatch/testing/assertion_response.rb
+++ b/actionpack/lib/action_dispatch/testing/assertion_response.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 module ActionDispatch
   # This is a class that abstracts away an asserted response. It purposely
   # does not inherit from Response because it doesn't need it. That means it
diff --git a/actionpack/lib/action_dispatch/testing/assertions.rb b/actionpack/lib/action_dispatch/testing/assertions.rb
index 4ea18d671d..c6eaae0a95 100644
--- a/actionpack/lib/action_dispatch/testing/assertions.rb
+++ b/actionpack/lib/action_dispatch/testing/assertions.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "rails-dom-testing"
 
 module ActionDispatch
diff --git a/actionpack/lib/action_dispatch/testing/assertions/response.rb b/actionpack/lib/action_dispatch/testing/assertions/response.rb
index 1baf979ac9..8c17ec5a75 100644
--- a/actionpack/lib/action_dispatch/testing/assertions/response.rb
+++ b/actionpack/lib/action_dispatch/testing/assertions/response.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 module ActionDispatch
   module Assertions
     # A small suite of assertions that test responses from \Rails applications.
diff --git a/actionpack/lib/action_dispatch/testing/assertions/routing.rb b/actionpack/lib/action_dispatch/testing/assertions/routing.rb
index 8645df4370..cde83dc537 100644
--- a/actionpack/lib/action_dispatch/testing/assertions/routing.rb
+++ b/actionpack/lib/action_dispatch/testing/assertions/routing.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "uri"
 require "active_support/core_ext/hash/indifferent_access"
 require "active_support/core_ext/string/access"
diff --git a/actionpack/lib/action_dispatch/testing/integration.rb b/actionpack/lib/action_dispatch/testing/integration.rb
index f16647fac8..d38a364801 100644
--- a/actionpack/lib/action_dispatch/testing/integration.rb
+++ b/actionpack/lib/action_dispatch/testing/integration.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "stringio"
 require "uri"
 require "active_support/core_ext/kernel/singleton_class"
diff --git a/actionpack/lib/action_dispatch/testing/request_encoder.rb b/actionpack/lib/action_dispatch/testing/request_encoder.rb
index 8c27e9ecb7..a614a9d5bc 100644
--- a/actionpack/lib/action_dispatch/testing/request_encoder.rb
+++ b/actionpack/lib/action_dispatch/testing/request_encoder.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 module ActionDispatch
   class RequestEncoder # :nodoc:
     class IdentityEncoder
diff --git a/actionpack/lib/action_dispatch/testing/test_process.rb b/actionpack/lib/action_dispatch/testing/test_process.rb
index 0282eb15c3..ea0e6dcb1a 100644
--- a/actionpack/lib/action_dispatch/testing/test_process.rb
+++ b/actionpack/lib/action_dispatch/testing/test_process.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "action_dispatch/middleware/cookies"
 require "action_dispatch/middleware/flash"
 
diff --git a/actionpack/lib/action_dispatch/testing/test_request.rb b/actionpack/lib/action_dispatch/testing/test_request.rb
index ec949c869b..0b2e8a6232 100644
--- a/actionpack/lib/action_dispatch/testing/test_request.rb
+++ b/actionpack/lib/action_dispatch/testing/test_request.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "active_support/core_ext/hash/indifferent_access"
 require "rack/utils"
 
diff --git a/actionpack/lib/action_dispatch/testing/test_response.rb b/actionpack/lib/action_dispatch/testing/test_response.rb
index 5c89f9c75e..c63e4b5b09 100644
--- a/actionpack/lib/action_dispatch/testing/test_response.rb
+++ b/actionpack/lib/action_dispatch/testing/test_response.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "action_dispatch/testing/request_encoder"
 
 module ActionDispatch
diff --git a/actionpack/lib/action_pack.rb b/actionpack/lib/action_pack.rb
index eec622e085..ada60031b0 100644
--- a/actionpack/lib/action_pack.rb
+++ b/actionpack/lib/action_pack.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 #--
 # Copyright (c) 2004-2017 David Heinemeier Hansson
 #
diff --git a/actionpack/lib/action_pack/gem_version.rb b/actionpack/lib/action_pack/gem_version.rb
index fddc3033d5..88c4bcd2d9 100644
--- a/actionpack/lib/action_pack/gem_version.rb
+++ b/actionpack/lib/action_pack/gem_version.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 module ActionPack
   # Returns the version of the currently loaded Action Pack as a <tt>Gem::Version</tt>
   def self.gem_version
diff --git a/actionpack/lib/action_pack/version.rb b/actionpack/lib/action_pack/version.rb
index 3d96158431..9b0c5026ac 100644
--- a/actionpack/lib/action_pack/version.rb
+++ b/actionpack/lib/action_pack/version.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require_relative "gem_version"
 
 module ActionPack
diff --git a/actionpack/test/abstract/callbacks_test.rb b/actionpack/test/abstract/callbacks_test.rb
index 9c2261bf76..6e1490cabf 100644
--- a/actionpack/test/abstract/callbacks_test.rb
+++ b/actionpack/test/abstract/callbacks_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 
 module AbstractController
diff --git a/actionpack/test/abstract/collector_test.rb b/actionpack/test/abstract/collector_test.rb
index 1cd3526483..c701001a4d 100644
--- a/actionpack/test/abstract/collector_test.rb
+++ b/actionpack/test/abstract/collector_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 
 module AbstractController
diff --git a/actionpack/test/abstract/translation_test.rb b/actionpack/test/abstract/translation_test.rb
index 4893144905..42f330bc9d 100644
--- a/actionpack/test/abstract/translation_test.rb
+++ b/actionpack/test/abstract/translation_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 
 module AbstractController
diff --git a/actionpack/test/abstract_unit.rb b/actionpack/test/abstract_unit.rb
index bd118b46be..e54c62b96b 100644
--- a/actionpack/test/abstract_unit.rb
+++ b/actionpack/test/abstract_unit.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 $:.unshift File.expand_path("lib", __dir__)
 $:.unshift File.expand_path("fixtures/helpers", __dir__)
 $:.unshift File.expand_path("fixtures/alternate_helpers", __dir__)
diff --git a/actionpack/test/assertions/response_assertions_test.rb b/actionpack/test/assertions/response_assertions_test.rb
index 14a04ccdb1..2a0fd92c79 100644
--- a/actionpack/test/assertions/response_assertions_test.rb
+++ b/actionpack/test/assertions/response_assertions_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 require "action_dispatch/testing/assertions/response"
 
diff --git a/actionpack/test/controller/action_pack_assertions_test.rb b/actionpack/test/controller/action_pack_assertions_test.rb
index 73aab5848b..baacd58207 100644
--- a/actionpack/test/controller/action_pack_assertions_test.rb
+++ b/actionpack/test/controller/action_pack_assertions_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 require "controller/fake_controllers"
 
diff --git a/actionpack/test/controller/api/conditional_get_test.rb b/actionpack/test/controller/api/conditional_get_test.rb
index 7b70829101..fa9aea0cd3 100644
--- a/actionpack/test/controller/api/conditional_get_test.rb
+++ b/actionpack/test/controller/api/conditional_get_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 require "active_support/core_ext/integer/time"
 require "active_support/core_ext/numeric/time"
diff --git a/actionpack/test/controller/api/data_streaming_test.rb b/actionpack/test/controller/api/data_streaming_test.rb
index e6419b9adf..cedec53f81 100644
--- a/actionpack/test/controller/api/data_streaming_test.rb
+++ b/actionpack/test/controller/api/data_streaming_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 
 module TestApiFileUtils
diff --git a/actionpack/test/controller/api/force_ssl_test.rb b/actionpack/test/controller/api/force_ssl_test.rb
index d239964e4a..2343d1340d 100644
--- a/actionpack/test/controller/api/force_ssl_test.rb
+++ b/actionpack/test/controller/api/force_ssl_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 
 class ForceSSLApiController < ActionController::API
diff --git a/actionpack/test/controller/api/implicit_render_test.rb b/actionpack/test/controller/api/implicit_render_test.rb
index b51ee0cf42..658ec8c4f9 100644
--- a/actionpack/test/controller/api/implicit_render_test.rb
+++ b/actionpack/test/controller/api/implicit_render_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 
 class ImplicitRenderAPITestController < ActionController::API
diff --git a/actionpack/test/controller/api/params_wrapper_test.rb b/actionpack/test/controller/api/params_wrapper_test.rb
index a1da852040..62fd2d8c8a 100644
--- a/actionpack/test/controller/api/params_wrapper_test.rb
+++ b/actionpack/test/controller/api/params_wrapper_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 
 class ParamsWrapperForApiTest < ActionController::TestCase
diff --git a/actionpack/test/controller/api/redirect_to_test.rb b/actionpack/test/controller/api/redirect_to_test.rb
index ab14409f40..442cfcca6e 100644
--- a/actionpack/test/controller/api/redirect_to_test.rb
+++ b/actionpack/test/controller/api/redirect_to_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 
 class RedirectToApiController < ActionController::API
diff --git a/actionpack/test/controller/api/renderers_test.rb b/actionpack/test/controller/api/renderers_test.rb
index 04e34a1f8f..fa0f75bcdf 100644
--- a/actionpack/test/controller/api/renderers_test.rb
+++ b/actionpack/test/controller/api/renderers_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 require "active_support/core_ext/hash/conversions"
 
diff --git a/actionpack/test/controller/api/url_for_test.rb b/actionpack/test/controller/api/url_for_test.rb
index cb4ae7a88a..958067f843 100644
--- a/actionpack/test/controller/api/url_for_test.rb
+++ b/actionpack/test/controller/api/url_for_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 
 class UrlForApiController < ActionController::API
diff --git a/actionpack/test/controller/api/with_cookies_test.rb b/actionpack/test/controller/api/with_cookies_test.rb
index 8928237dfd..3dd63a5285 100644
--- a/actionpack/test/controller/api/with_cookies_test.rb
+++ b/actionpack/test/controller/api/with_cookies_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 
 class WithCookiesController < ActionController::API
diff --git a/actionpack/test/controller/api/with_helpers_test.rb b/actionpack/test/controller/api/with_helpers_test.rb
index 06db949153..b9d8f6515f 100644
--- a/actionpack/test/controller/api/with_helpers_test.rb
+++ b/actionpack/test/controller/api/with_helpers_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 
 module ApiWithHelper
diff --git a/actionpack/test/controller/base_test.rb b/actionpack/test/controller/base_test.rb
index 4e969fac07..46828a0f9e 100644
--- a/actionpack/test/controller/base_test.rb
+++ b/actionpack/test/controller/base_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 require "active_support/logger"
 require "controller/fake_models"
diff --git a/actionpack/test/controller/caching_test.rb b/actionpack/test/controller/caching_test.rb
index c86dcafee5..aae7d0272f 100644
--- a/actionpack/test/controller/caching_test.rb
+++ b/actionpack/test/controller/caching_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "fileutils"
 require "abstract_unit"
 require "lib/controller/fake_models"
diff --git a/actionpack/test/controller/content_type_test.rb b/actionpack/test/controller/content_type_test.rb
index fcb2632b80..37b29eedf2 100644
--- a/actionpack/test/controller/content_type_test.rb
+++ b/actionpack/test/controller/content_type_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 
 class OldContentTypeController < ActionController::Base
diff --git a/actionpack/test/controller/default_url_options_with_before_action_test.rb b/actionpack/test/controller/default_url_options_with_before_action_test.rb
index e3fe7a6495..78eb72f5d0 100644
--- a/actionpack/test/controller/default_url_options_with_before_action_test.rb
+++ b/actionpack/test/controller/default_url_options_with_before_action_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 
 class ControllerWithBeforeActionAndDefaultUrlOptions < ActionController::Base
diff --git a/actionpack/test/controller/filters_test.rb b/actionpack/test/controller/filters_test.rb
index 5f1463cfa8..93706ca888 100644
--- a/actionpack/test/controller/filters_test.rb
+++ b/actionpack/test/controller/filters_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 
 class ActionController::Base
diff --git a/actionpack/test/controller/flash_hash_test.rb b/actionpack/test/controller/flash_hash_test.rb
index 45b598a594..d571f79b69 100644
--- a/actionpack/test/controller/flash_hash_test.rb
+++ b/actionpack/test/controller/flash_hash_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 
 module ActionDispatch
diff --git a/actionpack/test/controller/flash_test.rb b/actionpack/test/controller/flash_test.rb
index dc641c19ab..e2025e9ac2 100644
--- a/actionpack/test/controller/flash_test.rb
+++ b/actionpack/test/controller/flash_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 require "active_support/key_generator"
 
diff --git a/actionpack/test/controller/force_ssl_test.rb b/actionpack/test/controller/force_ssl_test.rb
index 2b3859aa57..0bfbed7b2c 100644
--- a/actionpack/test/controller/force_ssl_test.rb
+++ b/actionpack/test/controller/force_ssl_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 
 class ForceSSLController < ActionController::Base
diff --git a/actionpack/test/controller/form_builder_test.rb b/actionpack/test/controller/form_builder_test.rb
index 5a3dc2ee03..06c655f444 100644
--- a/actionpack/test/controller/form_builder_test.rb
+++ b/actionpack/test/controller/form_builder_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 
 class FormBuilderController < ActionController::Base
diff --git a/actionpack/test/controller/helper_test.rb b/actionpack/test/controller/helper_test.rb
index 03dbd63614..f7fd8c3f8b 100644
--- a/actionpack/test/controller/helper_test.rb
+++ b/actionpack/test/controller/helper_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 
 ActionController::Base.helpers_path = File.expand_path("../fixtures/helpers", __dir__)
diff --git a/actionpack/test/controller/http_basic_authentication_test.rb b/actionpack/test/controller/http_basic_authentication_test.rb
index d9ae787689..5b14855d59 100644
--- a/actionpack/test/controller/http_basic_authentication_test.rb
+++ b/actionpack/test/controller/http_basic_authentication_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 
 class HttpBasicAuthenticationTest < ActionController::TestCase
diff --git a/actionpack/test/controller/http_digest_authentication_test.rb b/actionpack/test/controller/http_digest_authentication_test.rb
index 0b59e123d7..f3a216075e 100644
--- a/actionpack/test/controller/http_digest_authentication_test.rb
+++ b/actionpack/test/controller/http_digest_authentication_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 require "active_support/key_generator"
 
diff --git a/actionpack/test/controller/http_token_authentication_test.rb b/actionpack/test/controller/http_token_authentication_test.rb
index 09d2793c9a..bcb47de98a 100644
--- a/actionpack/test/controller/http_token_authentication_test.rb
+++ b/actionpack/test/controller/http_token_authentication_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 
 class HttpTokenAuthenticationTest < ActionController::TestCase
diff --git a/actionpack/test/controller/integration_test.rb b/actionpack/test/controller/integration_test.rb
index cb282d4330..a610844fb1 100644
--- a/actionpack/test/controller/integration_test.rb
+++ b/actionpack/test/controller/integration_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 require "controller/fake_controllers"
 require "rails/engine"
diff --git a/actionpack/test/controller/live_stream_test.rb b/actionpack/test/controller/live_stream_test.rb
index bfb47b90d5..01ae9c75de 100644
--- a/actionpack/test/controller/live_stream_test.rb
+++ b/actionpack/test/controller/live_stream_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 require "timeout"
 require "concurrent/atomic/count_down_latch"
diff --git a/actionpack/test/controller/localized_templates_test.rb b/actionpack/test/controller/localized_templates_test.rb
index 0f2242b693..bbb5b356d9 100644
--- a/actionpack/test/controller/localized_templates_test.rb
+++ b/actionpack/test/controller/localized_templates_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 
 class LocalizedController < ActionController::Base
diff --git a/actionpack/test/controller/log_subscriber_test.rb b/actionpack/test/controller/log_subscriber_test.rb
index 45a120acb6..b17e351e0f 100644
--- a/actionpack/test/controller/log_subscriber_test.rb
+++ b/actionpack/test/controller/log_subscriber_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 require "active_support/log_subscriber/test_helper"
 require "action_controller/log_subscriber"
diff --git a/actionpack/test/controller/metal/renderers_test.rb b/actionpack/test/controller/metal/renderers_test.rb
index 7dc3dd6a6d..f713024056 100644
--- a/actionpack/test/controller/metal/renderers_test.rb
+++ b/actionpack/test/controller/metal/renderers_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 require "active_support/core_ext/hash/conversions"
 
diff --git a/actionpack/test/controller/metal_test.rb b/actionpack/test/controller/metal_test.rb
index e16452ed6f..67925359db 100644
--- a/actionpack/test/controller/metal_test.rb
+++ b/actionpack/test/controller/metal_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 
 class MetalControllerInstanceTests < ActiveSupport::TestCase
diff --git a/actionpack/test/controller/mime/accept_format_test.rb b/actionpack/test/controller/mime/accept_format_test.rb
index d1c4dbfef7..01325ba944 100644
--- a/actionpack/test/controller/mime/accept_format_test.rb
+++ b/actionpack/test/controller/mime/accept_format_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 
 class StarStarMimeController < ActionController::Base
diff --git a/actionpack/test/controller/mime/respond_to_test.rb b/actionpack/test/controller/mime/respond_to_test.rb
index 61bd5c80c4..63be0c7ce9 100644
--- a/actionpack/test/controller/mime/respond_to_test.rb
+++ b/actionpack/test/controller/mime/respond_to_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 require "active_support/log_subscriber/test_helper"
 
diff --git a/actionpack/test/controller/new_base/bare_metal_test.rb b/actionpack/test/controller/new_base/bare_metal_test.rb
index 054757fab3..7049464969 100644
--- a/actionpack/test/controller/new_base/bare_metal_test.rb
+++ b/actionpack/test/controller/new_base/bare_metal_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 
 module BareMetalTest
diff --git a/actionpack/test/controller/new_base/base_test.rb b/actionpack/test/controller/new_base/base_test.rb
index b891df4c0f..decb154812 100644
--- a/actionpack/test/controller/new_base/base_test.rb
+++ b/actionpack/test/controller/new_base/base_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 
 # Tests the controller dispatching happy path
diff --git a/actionpack/test/controller/new_base/content_negotiation_test.rb b/actionpack/test/controller/new_base/content_negotiation_test.rb
index b870745031..a61a573c21 100644
--- a/actionpack/test/controller/new_base/content_negotiation_test.rb
+++ b/actionpack/test/controller/new_base/content_negotiation_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 
 module ContentNegotiation
diff --git a/actionpack/test/controller/new_base/content_type_test.rb b/actionpack/test/controller/new_base/content_type_test.rb
index 85089bafe2..1c2cbc8493 100644
--- a/actionpack/test/controller/new_base/content_type_test.rb
+++ b/actionpack/test/controller/new_base/content_type_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 
 module ContentType
diff --git a/actionpack/test/controller/new_base/middleware_test.rb b/actionpack/test/controller/new_base/middleware_test.rb
index 0493291c03..7340a57389 100644
--- a/actionpack/test/controller/new_base/middleware_test.rb
+++ b/actionpack/test/controller/new_base/middleware_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 
 module MiddlewareTest
diff --git a/actionpack/test/controller/new_base/render_action_test.rb b/actionpack/test/controller/new_base/render_action_test.rb
index 4b59a3d676..bd55be2adc 100644
--- a/actionpack/test/controller/new_base/render_action_test.rb
+++ b/actionpack/test/controller/new_base/render_action_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 
 module RenderAction
diff --git a/actionpack/test/controller/new_base/render_body_test.rb b/actionpack/test/controller/new_base/render_body_test.rb
index b1467a0deb..647ae16329 100644
--- a/actionpack/test/controller/new_base/render_body_test.rb
+++ b/actionpack/test/controller/new_base/render_body_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 
 module RenderBody
diff --git a/actionpack/test/controller/new_base/render_context_test.rb b/actionpack/test/controller/new_base/render_context_test.rb
index 25b73ac78c..87b778b21b 100644
--- a/actionpack/test/controller/new_base/render_context_test.rb
+++ b/actionpack/test/controller/new_base/render_context_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 
 # This is testing the decoupling of view renderer and view context
diff --git a/actionpack/test/controller/new_base/render_file_test.rb b/actionpack/test/controller/new_base/render_file_test.rb
index 4491dd96ed..db7b1b94ee 100644
--- a/actionpack/test/controller/new_base/render_file_test.rb
+++ b/actionpack/test/controller/new_base/render_file_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 
 module RenderFile
diff --git a/actionpack/test/controller/new_base/render_html_test.rb b/actionpack/test/controller/new_base/render_html_test.rb
index 8019aa1eb5..8041e22a11 100644
--- a/actionpack/test/controller/new_base/render_html_test.rb
+++ b/actionpack/test/controller/new_base/render_html_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 
 module RenderHtml
diff --git a/actionpack/test/controller/new_base/render_implicit_action_test.rb b/actionpack/test/controller/new_base/render_implicit_action_test.rb
index c5fc8e15e1..9e2b02914d 100644
--- a/actionpack/test/controller/new_base/render_implicit_action_test.rb
+++ b/actionpack/test/controller/new_base/render_implicit_action_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 
 module RenderImplicitAction
diff --git a/actionpack/test/controller/new_base/render_layout_test.rb b/actionpack/test/controller/new_base/render_layout_test.rb
index 0a3809560e..c49e1890c3 100644
--- a/actionpack/test/controller/new_base/render_layout_test.rb
+++ b/actionpack/test/controller/new_base/render_layout_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 
 module ControllerLayouts
diff --git a/actionpack/test/controller/new_base/render_partial_test.rb b/actionpack/test/controller/new_base/render_partial_test.rb
index 4511826978..70a4f5a9d5 100644
--- a/actionpack/test/controller/new_base/render_partial_test.rb
+++ b/actionpack/test/controller/new_base/render_partial_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 
 module RenderPartial
diff --git a/actionpack/test/controller/new_base/render_plain_test.rb b/actionpack/test/controller/new_base/render_plain_test.rb
index 44be8dd380..236d9d0fd1 100644
--- a/actionpack/test/controller/new_base/render_plain_test.rb
+++ b/actionpack/test/controller/new_base/render_plain_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 
 module RenderPlain
diff --git a/actionpack/test/controller/new_base/render_streaming_test.rb b/actionpack/test/controller/new_base/render_streaming_test.rb
index 1177b8b03e..555e961aba 100644
--- a/actionpack/test/controller/new_base/render_streaming_test.rb
+++ b/actionpack/test/controller/new_base/render_streaming_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 
 module RenderStreaming
diff --git a/actionpack/test/controller/new_base/render_template_test.rb b/actionpack/test/controller/new_base/render_template_test.rb
index 1102305f3e..0ea1b6eeb7 100644
--- a/actionpack/test/controller/new_base/render_template_test.rb
+++ b/actionpack/test/controller/new_base/render_template_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 
 module RenderTemplate
diff --git a/actionpack/test/controller/new_base/render_test.rb b/actionpack/test/controller/new_base/render_test.rb
index cea3f9b5fd..ee81760450 100644
--- a/actionpack/test/controller/new_base/render_test.rb
+++ b/actionpack/test/controller/new_base/render_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 
 module Render
diff --git a/actionpack/test/controller/new_base/render_xml_test.rb b/actionpack/test/controller/new_base/render_xml_test.rb
index 8bab413377..bf3563080d 100644
--- a/actionpack/test/controller/new_base/render_xml_test.rb
+++ b/actionpack/test/controller/new_base/render_xml_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 
 module RenderXml
diff --git a/actionpack/test/controller/output_escaping_test.rb b/actionpack/test/controller/output_escaping_test.rb
index c7047d95ae..cf5eda7fc2 100644
--- a/actionpack/test/controller/output_escaping_test.rb
+++ b/actionpack/test/controller/output_escaping_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 
 class OutputEscapingTest < ActiveSupport::TestCase
diff --git a/actionpack/test/controller/parameter_encoding_test.rb b/actionpack/test/controller/parameter_encoding_test.rb
index 234d0bddd1..371188c230 100644
--- a/actionpack/test/controller/parameter_encoding_test.rb
+++ b/actionpack/test/controller/parameter_encoding_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 
 class ParameterEncodingController < ActionController::Base
diff --git a/actionpack/test/controller/parameters/accessors_test.rb b/actionpack/test/controller/parameters/accessors_test.rb
index 7725c25e22..05e80a162d 100644
--- a/actionpack/test/controller/parameters/accessors_test.rb
+++ b/actionpack/test/controller/parameters/accessors_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 require "action_controller/metal/strong_parameters"
 require "active_support/core_ext/hash/transform_values"
diff --git a/actionpack/test/controller/parameters/always_permitted_parameters_test.rb b/actionpack/test/controller/parameters/always_permitted_parameters_test.rb
index cd7c98f112..55c9d7b96a 100644
--- a/actionpack/test/controller/parameters/always_permitted_parameters_test.rb
+++ b/actionpack/test/controller/parameters/always_permitted_parameters_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 require "action_controller/metal/strong_parameters"
 
diff --git a/actionpack/test/controller/parameters/dup_test.rb b/actionpack/test/controller/parameters/dup_test.rb
index fb707a1354..4a163df390 100644
--- a/actionpack/test/controller/parameters/dup_test.rb
+++ b/actionpack/test/controller/parameters/dup_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 require "action_controller/metal/strong_parameters"
 require "active_support/core_ext/object/deep_dup"
diff --git a/actionpack/test/controller/parameters/log_on_unpermitted_params_test.rb b/actionpack/test/controller/parameters/log_on_unpermitted_params_test.rb
index c800c1d3df..52b588ee4f 100644
--- a/actionpack/test/controller/parameters/log_on_unpermitted_params_test.rb
+++ b/actionpack/test/controller/parameters/log_on_unpermitted_params_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 require "action_controller/metal/strong_parameters"
 
diff --git a/actionpack/test/controller/parameters/multi_parameter_attributes_test.rb b/actionpack/test/controller/parameters/multi_parameter_attributes_test.rb
index 88fb477c10..ef39fc3b71 100644
--- a/actionpack/test/controller/parameters/multi_parameter_attributes_test.rb
+++ b/actionpack/test/controller/parameters/multi_parameter_attributes_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 require "action_controller/metal/strong_parameters"
 
diff --git a/actionpack/test/controller/parameters/mutators_test.rb b/actionpack/test/controller/parameters/mutators_test.rb
index 3fe7340782..98dc621691 100644
--- a/actionpack/test/controller/parameters/mutators_test.rb
+++ b/actionpack/test/controller/parameters/mutators_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 require "action_controller/metal/strong_parameters"
 require "active_support/core_ext/hash/transform_values"
diff --git a/actionpack/test/controller/parameters/nested_parameters_permit_test.rb b/actionpack/test/controller/parameters/nested_parameters_permit_test.rb
index 00e591d5a7..46ac102802 100644
--- a/actionpack/test/controller/parameters/nested_parameters_permit_test.rb
+++ b/actionpack/test/controller/parameters/nested_parameters_permit_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 require "action_controller/metal/strong_parameters"
 
diff --git a/actionpack/test/controller/parameters/parameters_permit_test.rb b/actionpack/test/controller/parameters/parameters_permit_test.rb
index ae2b45c9f0..5b13b65f61 100644
--- a/actionpack/test/controller/parameters/parameters_permit_test.rb
+++ b/actionpack/test/controller/parameters/parameters_permit_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 require "action_dispatch/http/upload"
 require "action_controller/metal/strong_parameters"
diff --git a/actionpack/test/controller/parameters/raise_on_unpermitted_params_test.rb b/actionpack/test/controller/parameters/raise_on_unpermitted_params_test.rb
index 8fab7b28e9..b5e0406b9c 100644
--- a/actionpack/test/controller/parameters/raise_on_unpermitted_params_test.rb
+++ b/actionpack/test/controller/parameters/raise_on_unpermitted_params_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 require "action_controller/metal/strong_parameters"
 
diff --git a/actionpack/test/controller/parameters/serialization_test.rb b/actionpack/test/controller/parameters/serialization_test.rb
index 6fba2fde91..11e264a23a 100644
--- a/actionpack/test/controller/parameters/serialization_test.rb
+++ b/actionpack/test/controller/parameters/serialization_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 require "action_controller/metal/strong_parameters"
 require "active_support/core_ext/string/strip"
diff --git a/actionpack/test/controller/params_wrapper_test.rb b/actionpack/test/controller/params_wrapper_test.rb
index 4cbb28ef60..7eab456767 100644
--- a/actionpack/test/controller/params_wrapper_test.rb
+++ b/actionpack/test/controller/params_wrapper_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 
 module Admin; class User; end; end
diff --git a/actionpack/test/controller/permitted_params_test.rb b/actionpack/test/controller/permitted_params_test.rb
index 6205a09816..37b53360a4 100644
--- a/actionpack/test/controller/permitted_params_test.rb
+++ b/actionpack/test/controller/permitted_params_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 
 class PeopleController < ActionController::Base
diff --git a/actionpack/test/controller/redirect_test.rb b/actionpack/test/controller/redirect_test.rb
index 5b16af78c4..ecec3b63c4 100644
--- a/actionpack/test/controller/redirect_test.rb
+++ b/actionpack/test/controller/redirect_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 
 class Workshop
diff --git a/actionpack/test/controller/render_js_test.rb b/actionpack/test/controller/render_js_test.rb
index 290218d4a2..29b8651046 100644
--- a/actionpack/test/controller/render_js_test.rb
+++ b/actionpack/test/controller/render_js_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 require "controller/fake_models"
 require "pathname"
diff --git a/actionpack/test/controller/render_json_test.rb b/actionpack/test/controller/render_json_test.rb
index 79552ec8f1..2173d89276 100644
--- a/actionpack/test/controller/render_json_test.rb
+++ b/actionpack/test/controller/render_json_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 require "controller/fake_models"
 require "active_support/logger"
diff --git a/actionpack/test/controller/render_test.rb b/actionpack/test/controller/render_test.rb
index 17d834d55f..a9ef36690c 100644
--- a/actionpack/test/controller/render_test.rb
+++ b/actionpack/test/controller/render_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 require "controller/fake_models"
 
diff --git a/actionpack/test/controller/render_xml_test.rb b/actionpack/test/controller/render_xml_test.rb
index 24866d7d6a..0bd73fe880 100644
--- a/actionpack/test/controller/render_xml_test.rb
+++ b/actionpack/test/controller/render_xml_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 require "controller/fake_models"
 require "pathname"
diff --git a/actionpack/test/controller/renderer_test.rb b/actionpack/test/controller/renderer_test.rb
index 052c974d68..817dbc2f34 100644
--- a/actionpack/test/controller/renderer_test.rb
+++ b/actionpack/test/controller/renderer_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 
 class RendererTest < ActiveSupport::TestCase
diff --git a/actionpack/test/controller/renderers_test.rb b/actionpack/test/controller/renderers_test.rb
index ccc700d79c..63f36adeeb 100644
--- a/actionpack/test/controller/renderers_test.rb
+++ b/actionpack/test/controller/renderers_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 require "controller/fake_models"
 require "active_support/logger"
diff --git a/actionpack/test/controller/request/test_request_test.rb b/actionpack/test/controller/request/test_request_test.rb
index 1440db00f6..a051e0f86c 100644
--- a/actionpack/test/controller/request/test_request_test.rb
+++ b/actionpack/test/controller/request/test_request_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 require "stringio"
 
diff --git a/actionpack/test/controller/request_forgery_protection_test.rb b/actionpack/test/controller/request_forgery_protection_test.rb
index 521d93f02e..0fb103b444 100644
--- a/actionpack/test/controller/request_forgery_protection_test.rb
+++ b/actionpack/test/controller/request_forgery_protection_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 require "active_support/log_subscriber/test_helper"
 
diff --git a/actionpack/test/controller/required_params_test.rb b/actionpack/test/controller/required_params_test.rb
index 46bb374b3f..9d9a9d49b5 100644
--- a/actionpack/test/controller/required_params_test.rb
+++ b/actionpack/test/controller/required_params_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 
 class BooksController < ActionController::Base
diff --git a/actionpack/test/controller/rescue_test.rb b/actionpack/test/controller/rescue_test.rb
index 9ae22c4554..45c04f566d 100644
--- a/actionpack/test/controller/rescue_test.rb
+++ b/actionpack/test/controller/rescue_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 
 class RescueController < ActionController::Base
diff --git a/actionpack/test/controller/resources_test.rb b/actionpack/test/controller/resources_test.rb
index fad34dacce..a3833a593d 100644
--- a/actionpack/test/controller/resources_test.rb
+++ b/actionpack/test/controller/resources_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 require "active_support/core_ext/object/try"
 require "active_support/core_ext/object/with_options"
diff --git a/actionpack/test/controller/routing_test.rb b/actionpack/test/controller/routing_test.rb
index 56b39510bb..2f82b000d7 100644
--- a/actionpack/test/controller/routing_test.rb
+++ b/actionpack/test/controller/routing_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 require "controller/fake_controllers"
 require "active_support/core_ext/object/with_options"
diff --git a/actionpack/test/controller/runner_test.rb b/actionpack/test/controller/runner_test.rb
index 3c0c1907f9..558995b48b 100644
--- a/actionpack/test/controller/runner_test.rb
+++ b/actionpack/test/controller/runner_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 require "action_dispatch/testing/integration"
 
diff --git a/actionpack/test/controller/send_file_test.rb b/actionpack/test/controller/send_file_test.rb
index e265c6c49c..20ed938e56 100644
--- a/actionpack/test/controller/send_file_test.rb
+++ b/actionpack/test/controller/send_file_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 
 module TestFileUtils
diff --git a/actionpack/test/controller/show_exceptions_test.rb b/actionpack/test/controller/show_exceptions_test.rb
index 38c601ee81..13a5001f39 100644
--- a/actionpack/test/controller/show_exceptions_test.rb
+++ b/actionpack/test/controller/show_exceptions_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 
 module ShowExceptions
diff --git a/actionpack/test/controller/streaming_test.rb b/actionpack/test/controller/streaming_test.rb
index d685467cad..c03a09dc1f 100644
--- a/actionpack/test/controller/streaming_test.rb
+++ b/actionpack/test/controller/streaming_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 
 module ActionController
diff --git a/actionpack/test/controller/test_case_test.rb b/actionpack/test/controller/test_case_test.rb
index 677e2ddded..fe10d8f381 100644
--- a/actionpack/test/controller/test_case_test.rb
+++ b/actionpack/test/controller/test_case_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 require "controller/fake_controllers"
 require "active_support/json/decoding"
diff --git a/actionpack/test/controller/url_for_integration_test.rb b/actionpack/test/controller/url_for_integration_test.rb
index f640e77b99..e910f95e24 100644
--- a/actionpack/test/controller/url_for_integration_test.rb
+++ b/actionpack/test/controller/url_for_integration_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 require "controller/fake_controllers"
 require "active_support/core_ext/object/with_options"
diff --git a/actionpack/test/controller/url_for_test.rb b/actionpack/test/controller/url_for_test.rb
index 2afe67ed91..bd618adb3e 100644
--- a/actionpack/test/controller/url_for_test.rb
+++ b/actionpack/test/controller/url_for_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 
 module AbstractController
diff --git a/actionpack/test/controller/url_rewriter_test.rb b/actionpack/test/controller/url_rewriter_test.rb
index a055e6d177..ca1be68927 100644
--- a/actionpack/test/controller/url_rewriter_test.rb
+++ b/actionpack/test/controller/url_rewriter_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 require "controller/fake_controllers"
 
diff --git a/actionpack/test/controller/webservice_test.rb b/actionpack/test/controller/webservice_test.rb
index 6f97a4b62e..3ec6e5eda5 100644
--- a/actionpack/test/controller/webservice_test.rb
+++ b/actionpack/test/controller/webservice_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 require "active_support/json/decoding"
 
diff --git a/actionpack/test/dispatch/callbacks_test.rb b/actionpack/test/dispatch/callbacks_test.rb
index 29a5dfc0ad..0edeb93cd5 100644
--- a/actionpack/test/dispatch/callbacks_test.rb
+++ b/actionpack/test/dispatch/callbacks_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 
 class DispatcherTest < ActiveSupport::TestCase
diff --git a/actionpack/test/dispatch/cookies_test.rb b/actionpack/test/dispatch/cookies_test.rb
index e5646de82e..6e37d2ad07 100644
--- a/actionpack/test/dispatch/cookies_test.rb
+++ b/actionpack/test/dispatch/cookies_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 require "openssl"
 require "active_support/key_generator"
diff --git a/actionpack/test/dispatch/debug_exceptions_test.rb b/actionpack/test/dispatch/debug_exceptions_test.rb
index ea477e8908..dc98681c6e 100644
--- a/actionpack/test/dispatch/debug_exceptions_test.rb
+++ b/actionpack/test/dispatch/debug_exceptions_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 
 class DebugExceptionsTest < ActionDispatch::IntegrationTest
diff --git a/actionpack/test/dispatch/exception_wrapper_test.rb b/actionpack/test/dispatch/exception_wrapper_test.rb
index 316661a116..54079b3b38 100644
--- a/actionpack/test/dispatch/exception_wrapper_test.rb
+++ b/actionpack/test/dispatch/exception_wrapper_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 
 module ActionDispatch
diff --git a/actionpack/test/dispatch/executor_test.rb b/actionpack/test/dispatch/executor_test.rb
index 0b4e0849c3..1250723cb5 100644
--- a/actionpack/test/dispatch/executor_test.rb
+++ b/actionpack/test/dispatch/executor_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 
 class ExecutorTest < ActiveSupport::TestCase
diff --git a/actionpack/test/dispatch/header_test.rb b/actionpack/test/dispatch/header_test.rb
index 958450072e..11b7dee8c9 100644
--- a/actionpack/test/dispatch/header_test.rb
+++ b/actionpack/test/dispatch/header_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 
 class HeaderTest < ActiveSupport::TestCase
diff --git a/actionpack/test/dispatch/live_response_test.rb b/actionpack/test/dispatch/live_response_test.rb
index d10fc7d575..21d9cccbf7 100644
--- a/actionpack/test/dispatch/live_response_test.rb
+++ b/actionpack/test/dispatch/live_response_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 require "concurrent/atomic/count_down_latch"
 
diff --git a/actionpack/test/dispatch/mapper_test.rb b/actionpack/test/dispatch/mapper_test.rb
index 1596d23b1e..3fad24ee7f 100644
--- a/actionpack/test/dispatch/mapper_test.rb
+++ b/actionpack/test/dispatch/mapper_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 
 module ActionDispatch
diff --git a/actionpack/test/dispatch/middleware_stack_test.rb b/actionpack/test/dispatch/middleware_stack_test.rb
index 481aa22b10..adb17e83d4 100644
--- a/actionpack/test/dispatch/middleware_stack_test.rb
+++ b/actionpack/test/dispatch/middleware_stack_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 
 class MiddlewareStackTest < ActiveSupport::TestCase
diff --git a/actionpack/test/dispatch/mime_type_test.rb b/actionpack/test/dispatch/mime_type_test.rb
index 2ca03c535a..6c254fb690 100644
--- a/actionpack/test/dispatch/mime_type_test.rb
+++ b/actionpack/test/dispatch/mime_type_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 
 class MimeTypeTest < ActiveSupport::TestCase
diff --git a/actionpack/test/dispatch/mount_test.rb b/actionpack/test/dispatch/mount_test.rb
index a7d5ba2345..c64c782136 100644
--- a/actionpack/test/dispatch/mount_test.rb
+++ b/actionpack/test/dispatch/mount_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 require "rails/engine"
 
diff --git a/actionpack/test/dispatch/prefix_generation_test.rb b/actionpack/test/dispatch/prefix_generation_test.rb
index 0e093d2188..a40f92dc58 100644
--- a/actionpack/test/dispatch/prefix_generation_test.rb
+++ b/actionpack/test/dispatch/prefix_generation_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 require "rack/test"
 require "rails/engine"
diff --git a/actionpack/test/dispatch/rack_cache_test.rb b/actionpack/test/dispatch/rack_cache_test.rb
index d7bb90abbf..4f23711a21 100644
--- a/actionpack/test/dispatch/rack_cache_test.rb
+++ b/actionpack/test/dispatch/rack_cache_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 require "action_dispatch/http/rack_cache"
 
diff --git a/actionpack/test/dispatch/reloader_test.rb b/actionpack/test/dispatch/reloader_test.rb
index 9eb78fe059..1d89abc038 100644
--- a/actionpack/test/dispatch/reloader_test.rb
+++ b/actionpack/test/dispatch/reloader_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 
 class ReloaderTest < ActiveSupport::TestCase
diff --git a/actionpack/test/dispatch/request/json_params_parsing_test.rb b/actionpack/test/dispatch/request/json_params_parsing_test.rb
index 10234a4815..8dec548fc4 100644
--- a/actionpack/test/dispatch/request/json_params_parsing_test.rb
+++ b/actionpack/test/dispatch/request/json_params_parsing_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 
 class JsonParamsParsingTest < ActionDispatch::IntegrationTest
diff --git a/actionpack/test/dispatch/request/multipart_params_parsing_test.rb b/actionpack/test/dispatch/request/multipart_params_parsing_test.rb
index e7e8c82974..bfdc675e2c 100644
--- a/actionpack/test/dispatch/request/multipart_params_parsing_test.rb
+++ b/actionpack/test/dispatch/request/multipart_params_parsing_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 
 class MultipartParamsParsingTest < ActionDispatch::IntegrationTest
diff --git a/actionpack/test/dispatch/request/query_string_parsing_test.rb b/actionpack/test/dispatch/request/query_string_parsing_test.rb
index 2499c33cef..eda8a493c4 100644
--- a/actionpack/test/dispatch/request/query_string_parsing_test.rb
+++ b/actionpack/test/dispatch/request/query_string_parsing_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 
 class QueryStringParsingTest < ActionDispatch::IntegrationTest
diff --git a/actionpack/test/dispatch/request/session_test.rb b/actionpack/test/dispatch/request/session_test.rb
index 228135c547..6e6b58b633 100644
--- a/actionpack/test/dispatch/request/session_test.rb
+++ b/actionpack/test/dispatch/request/session_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 require "action_dispatch/middleware/session/abstract_store"
 
diff --git a/actionpack/test/dispatch/request/url_encoded_params_parsing_test.rb b/actionpack/test/dispatch/request/url_encoded_params_parsing_test.rb
index 6721a388c1..80362066da 100644
--- a/actionpack/test/dispatch/request/url_encoded_params_parsing_test.rb
+++ b/actionpack/test/dispatch/request/url_encoded_params_parsing_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 
 class UrlEncodedParamsParsingTest < ActionDispatch::IntegrationTest
diff --git a/actionpack/test/dispatch/request_id_test.rb b/actionpack/test/dispatch/request_id_test.rb
index 4fcd45acf5..d2b5505054 100644
--- a/actionpack/test/dispatch/request_id_test.rb
+++ b/actionpack/test/dispatch/request_id_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 
 class RequestIdTest < ActiveSupport::TestCase
diff --git a/actionpack/test/dispatch/request_test.rb b/actionpack/test/dispatch/request_test.rb
index 899b27b962..a2305a0fa2 100644
--- a/actionpack/test/dispatch/request_test.rb
+++ b/actionpack/test/dispatch/request_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 
 class BaseRequestTest < ActiveSupport::TestCase
diff --git a/actionpack/test/dispatch/response_test.rb b/actionpack/test/dispatch/response_test.rb
index 7433c5ce0c..ca3dfba6ec 100644
--- a/actionpack/test/dispatch/response_test.rb
+++ b/actionpack/test/dispatch/response_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 require "timeout"
 require "rack/content_length"
diff --git a/actionpack/test/dispatch/routing/concerns_test.rb b/actionpack/test/dispatch/routing/concerns_test.rb
index 2d71c37562..bf6dfda3b8 100644
--- a/actionpack/test/dispatch/routing/concerns_test.rb
+++ b/actionpack/test/dispatch/routing/concerns_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 
 class ReviewsController < ResourcesController; end
diff --git a/actionpack/test/dispatch/routing/custom_url_helpers_test.rb b/actionpack/test/dispatch/routing/custom_url_helpers_test.rb
index 338992dda5..d9a30fa42f 100644
--- a/actionpack/test/dispatch/routing/custom_url_helpers_test.rb
+++ b/actionpack/test/dispatch/routing/custom_url_helpers_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 
 class TestCustomUrlHelpers < ActionDispatch::IntegrationTest
diff --git a/actionpack/test/dispatch/routing/inspector_test.rb b/actionpack/test/dispatch/routing/inspector_test.rb
index a4babf8554..1d04569d6d 100644
--- a/actionpack/test/dispatch/routing/inspector_test.rb
+++ b/actionpack/test/dispatch/routing/inspector_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 require "rails/engine"
 require "action_dispatch/routing/inspector"
diff --git a/actionpack/test/dispatch/routing/ipv6_redirect_test.rb b/actionpack/test/dispatch/routing/ipv6_redirect_test.rb
index 179aee9ba7..6e4fb6842b 100644
--- a/actionpack/test/dispatch/routing/ipv6_redirect_test.rb
+++ b/actionpack/test/dispatch/routing/ipv6_redirect_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 
 class IPv6IntegrationTest < ActionDispatch::IntegrationTest
diff --git a/actionpack/test/dispatch/routing/route_set_test.rb b/actionpack/test/dispatch/routing/route_set_test.rb
index d6ecbda092..d78b9f85f7 100644
--- a/actionpack/test/dispatch/routing/route_set_test.rb
+++ b/actionpack/test/dispatch/routing/route_set_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 
 module ActionDispatch
diff --git a/actionpack/test/dispatch/routing_assertions_test.rb b/actionpack/test/dispatch/routing_assertions_test.rb
index 917ce7e668..a1c3cffdef 100644
--- a/actionpack/test/dispatch/routing_assertions_test.rb
+++ b/actionpack/test/dispatch/routing_assertions_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 require "controller/fake_controllers"
 
diff --git a/actionpack/test/dispatch/routing_test.rb b/actionpack/test/dispatch/routing_test.rb
index 32cd78e492..967e5c78ff 100644
--- a/actionpack/test/dispatch/routing_test.rb
+++ b/actionpack/test/dispatch/routing_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "erb"
 require "abstract_unit"
 require "controller/fake_controllers"
diff --git a/actionpack/test/dispatch/runner_test.rb b/actionpack/test/dispatch/runner_test.rb
index b76bf4a320..1adf8e6d11 100644
--- a/actionpack/test/dispatch/runner_test.rb
+++ b/actionpack/test/dispatch/runner_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 
 class RunnerTest < ActiveSupport::TestCase
diff --git a/actionpack/test/dispatch/session/abstract_store_test.rb b/actionpack/test/dispatch/session/abstract_store_test.rb
index fd4d359cf8..903ec8cc77 100644
--- a/actionpack/test/dispatch/session/abstract_store_test.rb
+++ b/actionpack/test/dispatch/session/abstract_store_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 require "action_dispatch/middleware/session/abstract_store"
 
diff --git a/actionpack/test/dispatch/session/cache_store_test.rb b/actionpack/test/dispatch/session/cache_store_test.rb
index 859059063f..4f483a851d 100644
--- a/actionpack/test/dispatch/session/cache_store_test.rb
+++ b/actionpack/test/dispatch/session/cache_store_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 require "fixtures/session_autoload_test/session_autoload_test/foo"
 
diff --git a/actionpack/test/dispatch/session/cookie_store_test.rb b/actionpack/test/dispatch/session/cookie_store_test.rb
index 63dfc07c0d..41a55f2ec0 100644
--- a/actionpack/test/dispatch/session/cookie_store_test.rb
+++ b/actionpack/test/dispatch/session/cookie_store_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 require "stringio"
 require "active_support/key_generator"
diff --git a/actionpack/test/dispatch/session/mem_cache_store_test.rb b/actionpack/test/dispatch/session/mem_cache_store_test.rb
index 121e9ebef7..f66075add7 100644
--- a/actionpack/test/dispatch/session/mem_cache_store_test.rb
+++ b/actionpack/test/dispatch/session/mem_cache_store_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 require "securerandom"
 
diff --git a/actionpack/test/dispatch/session/test_session_test.rb b/actionpack/test/dispatch/session/test_session_test.rb
index 0bf3a8b3ee..e355645acc 100644
--- a/actionpack/test/dispatch/session/test_session_test.rb
+++ b/actionpack/test/dispatch/session/test_session_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 require "stringio"
 
diff --git a/actionpack/test/dispatch/show_exceptions_test.rb b/actionpack/test/dispatch/show_exceptions_test.rb
index 3513534d72..9f6e15ec61 100644
--- a/actionpack/test/dispatch/show_exceptions_test.rb
+++ b/actionpack/test/dispatch/show_exceptions_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 
 class ShowExceptionsTest < ActionDispatch::IntegrationTest
diff --git a/actionpack/test/dispatch/ssl_test.rb b/actionpack/test/dispatch/ssl_test.rb
index 757e26973f..7b9cf1cba4 100644
--- a/actionpack/test/dispatch/ssl_test.rb
+++ b/actionpack/test/dispatch/ssl_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 
 class SSLTest < ActionDispatch::IntegrationTest
diff --git a/actionpack/test/dispatch/static_test.rb b/actionpack/test/dispatch/static_test.rb
index 3082d1072b..ce95d2b74b 100644
--- a/actionpack/test/dispatch/static_test.rb
+++ b/actionpack/test/dispatch/static_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 require "zlib"
 
diff --git a/actionpack/test/dispatch/system_testing/driver_test.rb b/actionpack/test/dispatch/system_testing/driver_test.rb
index 4a1b971da5..579c92f2ae 100644
--- a/actionpack/test/dispatch/system_testing/driver_test.rb
+++ b/actionpack/test/dispatch/system_testing/driver_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 require "action_dispatch/system_testing/driver"
 
diff --git a/actionpack/test/dispatch/system_testing/screenshot_helper_test.rb b/actionpack/test/dispatch/system_testing/screenshot_helper_test.rb
index a83818fd80..0f0c7c157a 100644
--- a/actionpack/test/dispatch/system_testing/screenshot_helper_test.rb
+++ b/actionpack/test/dispatch/system_testing/screenshot_helper_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 require "action_dispatch/system_testing/test_helpers/screenshot_helper"
 require "capybara/dsl"
diff --git a/actionpack/test/dispatch/system_testing/server_test.rb b/actionpack/test/dispatch/system_testing/server_test.rb
index 10412d6367..e1cecce3e1 100644
--- a/actionpack/test/dispatch/system_testing/server_test.rb
+++ b/actionpack/test/dispatch/system_testing/server_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 require "capybara/dsl"
 require "action_dispatch/system_testing/server"
diff --git a/actionpack/test/dispatch/system_testing/system_test_case_test.rb b/actionpack/test/dispatch/system_testing/system_test_case_test.rb
index 8f90e45f5f..b853079476 100644
--- a/actionpack/test/dispatch/system_testing/system_test_case_test.rb
+++ b/actionpack/test/dispatch/system_testing/system_test_case_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 
 class SetDriverToRackTestTest < DrivenByRackTest
diff --git a/actionpack/test/dispatch/test_request_test.rb b/actionpack/test/dispatch/test_request_test.rb
index 85a6df4975..1bfafb6169 100644
--- a/actionpack/test/dispatch/test_request_test.rb
+++ b/actionpack/test/dispatch/test_request_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 
 class TestRequestTest < ActiveSupport::TestCase
diff --git a/actionpack/test/dispatch/test_response_test.rb b/actionpack/test/dispatch/test_response_test.rb
index 98eafb5119..4e208f4784 100644
--- a/actionpack/test/dispatch/test_response_test.rb
+++ b/actionpack/test/dispatch/test_response_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 
 class TestResponseTest < ActiveSupport::TestCase
diff --git a/actionpack/test/dispatch/uploaded_file_test.rb b/actionpack/test/dispatch/uploaded_file_test.rb
index 0074d2a314..e47e122dfa 100644
--- a/actionpack/test/dispatch/uploaded_file_test.rb
+++ b/actionpack/test/dispatch/uploaded_file_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 
 module ActionDispatch
diff --git a/actionpack/test/dispatch/url_generation_test.rb b/actionpack/test/dispatch/url_generation_test.rb
index 5d81fd6834..c87c3f628a 100644
--- a/actionpack/test/dispatch/url_generation_test.rb
+++ b/actionpack/test/dispatch/url_generation_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 
 module TestUrlGeneration
diff --git a/actionpack/test/fixtures/alternate_helpers/foo_helper.rb b/actionpack/test/fixtures/alternate_helpers/foo_helper.rb
index 2528584473..66e74edd51 100644
--- a/actionpack/test/fixtures/alternate_helpers/foo_helper.rb
+++ b/actionpack/test/fixtures/alternate_helpers/foo_helper.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 module FooHelper
   redefine_method(:baz) {}
 end
diff --git a/actionpack/test/fixtures/company.rb b/actionpack/test/fixtures/company.rb
index 9f527acdd8..18a197947a 100644
--- a/actionpack/test/fixtures/company.rb
+++ b/actionpack/test/fixtures/company.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 class Company < ActiveRecord::Base
   has_one :mascot
   self.sequence_name = :companies_nonstd_seq
diff --git a/actionpack/test/fixtures/functional_caching/formatted_fragment_cached.xml.builder b/actionpack/test/fixtures/functional_caching/formatted_fragment_cached.xml.builder
index 6599579740..91b5160fcb 100644
--- a/actionpack/test/fixtures/functional_caching/formatted_fragment_cached.xml.builder
+++ b/actionpack/test/fixtures/functional_caching/formatted_fragment_cached.xml.builder
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 xml.body do
   cache("fragment") do
     xml.p "Builder"
diff --git a/actionpack/test/fixtures/helpers/abc_helper.rb b/actionpack/test/fixtures/helpers/abc_helper.rb
index cf2774bb5f..a743c7ee9a 100644
--- a/actionpack/test/fixtures/helpers/abc_helper.rb
+++ b/actionpack/test/fixtures/helpers/abc_helper.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 module AbcHelper
   def bare_a() end
 end
diff --git a/actionpack/test/fixtures/helpers/fun/games_helper.rb b/actionpack/test/fixtures/helpers/fun/games_helper.rb
index 2d5e50f5a5..7781f9087c 100644
--- a/actionpack/test/fixtures/helpers/fun/games_helper.rb
+++ b/actionpack/test/fixtures/helpers/fun/games_helper.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 module Fun
   module GamesHelper
     def stratego() "Iz guuut!" end
diff --git a/actionpack/test/fixtures/helpers/fun/pdf_helper.rb b/actionpack/test/fixtures/helpers/fun/pdf_helper.rb
index 16057fd466..70d8f722fb 100644
--- a/actionpack/test/fixtures/helpers/fun/pdf_helper.rb
+++ b/actionpack/test/fixtures/helpers/fun/pdf_helper.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 module Fun
   module PdfHelper
     def foobar() "baz" end
diff --git a/actionpack/test/fixtures/helpers/just_me_helper.rb b/actionpack/test/fixtures/helpers/just_me_helper.rb
index 9b43fc6d49..eb0cce3b77 100644
--- a/actionpack/test/fixtures/helpers/just_me_helper.rb
+++ b/actionpack/test/fixtures/helpers/just_me_helper.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 module JustMeHelper
   def me() "mine!" end
 end
diff --git a/actionpack/test/fixtures/helpers/me_too_helper.rb b/actionpack/test/fixtures/helpers/me_too_helper.rb
index 8e312e7cd0..e8eb1ea52a 100644
--- a/actionpack/test/fixtures/helpers/me_too_helper.rb
+++ b/actionpack/test/fixtures/helpers/me_too_helper.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 module MeTooHelper
   def me() "me too!" end
 end
diff --git a/actionpack/test/fixtures/helpers1_pack/pack1_helper.rb b/actionpack/test/fixtures/helpers1_pack/pack1_helper.rb
index 9faa427736..9ff86420be 100644
--- a/actionpack/test/fixtures/helpers1_pack/pack1_helper.rb
+++ b/actionpack/test/fixtures/helpers1_pack/pack1_helper.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 module Pack1Helper
   def conflicting_helper
     "pack1"
diff --git a/actionpack/test/fixtures/helpers2_pack/pack2_helper.rb b/actionpack/test/fixtures/helpers2_pack/pack2_helper.rb
index cf56697dfb..8b39ffd971 100644
--- a/actionpack/test/fixtures/helpers2_pack/pack2_helper.rb
+++ b/actionpack/test/fixtures/helpers2_pack/pack2_helper.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 module Pack2Helper
   def conflicting_helper
     "pack2"
diff --git a/actionpack/test/fixtures/helpers_typo/admin/users_helper.rb b/actionpack/test/fixtures/helpers_typo/admin/users_helper.rb
index 64aa1a0476..fbfeeaedde 100644
--- a/actionpack/test/fixtures/helpers_typo/admin/users_helper.rb
+++ b/actionpack/test/fixtures/helpers_typo/admin/users_helper.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 module Admin
   module UsersHelpeR
   end
diff --git a/actionpack/test/fixtures/layouts/builder.builder b/actionpack/test/fixtures/layouts/builder.builder
index c55488edd0..0f34d03a4c 100644
--- a/actionpack/test/fixtures/layouts/builder.builder
+++ b/actionpack/test/fixtures/layouts/builder.builder
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 xml.wrapper do
   xml << yield
 end
diff --git a/actionpack/test/fixtures/load_me.rb b/actionpack/test/fixtures/load_me.rb
index e516512a4e..e826cba0f7 100644
--- a/actionpack/test/fixtures/load_me.rb
+++ b/actionpack/test/fixtures/load_me.rb
@@ -1,2 +1,3 @@
+# frozen_string_literal: true
 class LoadMe
 end
diff --git a/actionpack/test/fixtures/old_content_type/render_default_for_builder.builder b/actionpack/test/fixtures/old_content_type/render_default_for_builder.builder
index 15c8a7f5cf..d2761ed8c3 100644
--- a/actionpack/test/fixtures/old_content_type/render_default_for_builder.builder
+++ b/actionpack/test/fixtures/old_content_type/render_default_for_builder.builder
@@ -1 +1,2 @@
+# frozen_string_literal: true
 xml.p "Hello world!"
diff --git a/actionpack/test/fixtures/respond_to/using_defaults.xml.builder b/actionpack/test/fixtures/respond_to/using_defaults.xml.builder
index 15c8a7f5cf..d2761ed8c3 100644
--- a/actionpack/test/fixtures/respond_to/using_defaults.xml.builder
+++ b/actionpack/test/fixtures/respond_to/using_defaults.xml.builder
@@ -1 +1,2 @@
+# frozen_string_literal: true
 xml.p "Hello world!"
diff --git a/actionpack/test/fixtures/respond_to/using_defaults_with_type_list.xml.builder b/actionpack/test/fixtures/respond_to/using_defaults_with_type_list.xml.builder
index 15c8a7f5cf..d2761ed8c3 100644
--- a/actionpack/test/fixtures/respond_to/using_defaults_with_type_list.xml.builder
+++ b/actionpack/test/fixtures/respond_to/using_defaults_with_type_list.xml.builder
@@ -1 +1,2 @@
+# frozen_string_literal: true
 xml.p "Hello world!"
diff --git a/actionpack/test/fixtures/ruby_template.ruby b/actionpack/test/fixtures/ruby_template.ruby
index 5097bce47c..cae21339f5 100644
--- a/actionpack/test/fixtures/ruby_template.ruby
+++ b/actionpack/test/fixtures/ruby_template.ruby
@@ -1,2 +1,3 @@
+# frozen_string_literal: true
 body = ""
 body << ["Hello", "from", "Ruby", "code"].join(" ")
diff --git a/actionpack/test/fixtures/session_autoload_test/session_autoload_test/foo.rb b/actionpack/test/fixtures/session_autoload_test/session_autoload_test/foo.rb
index 18fa5cd923..cb488a595b 100644
--- a/actionpack/test/fixtures/session_autoload_test/session_autoload_test/foo.rb
+++ b/actionpack/test/fixtures/session_autoload_test/session_autoload_test/foo.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 module SessionAutoloadTest
   class Foo
     def initialize(bar = "baz")
diff --git a/actionpack/test/fixtures/test/formatted_xml_erb.builder b/actionpack/test/fixtures/test/formatted_xml_erb.builder
index f98aaa34a5..568a2ddefe 100644
--- a/actionpack/test/fixtures/test/formatted_xml_erb.builder
+++ b/actionpack/test/fixtures/test/formatted_xml_erb.builder
@@ -1 +1,2 @@
+# frozen_string_literal: true
 xml.test "failed"
diff --git a/actionpack/test/fixtures/test/hello_xml_world.builder b/actionpack/test/fixtures/test/hello_xml_world.builder
index d16bb6b5cb..c496fb4160 100644
--- a/actionpack/test/fixtures/test/hello_xml_world.builder
+++ b/actionpack/test/fixtures/test/hello_xml_world.builder
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 xml.html do
   xml.head do
     xml.title "Hello World"
diff --git a/actionpack/test/fixtures/test/implicit_content_type.atom.builder b/actionpack/test/fixtures/test/implicit_content_type.atom.builder
index 2fcb32d247..bcb3c79f0b 100644
--- a/actionpack/test/fixtures/test/implicit_content_type.atom.builder
+++ b/actionpack/test/fixtures/test/implicit_content_type.atom.builder
@@ -1,2 +1,3 @@
+# frozen_string_literal: true
 xml.atom do
 end
diff --git a/actionpack/test/journey/gtg/builder_test.rb b/actionpack/test/journey/gtg/builder_test.rb
index aa8427b265..f48394a243 100644
--- a/actionpack/test/journey/gtg/builder_test.rb
+++ b/actionpack/test/journey/gtg/builder_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 
 module ActionDispatch
diff --git a/actionpack/test/journey/gtg/transition_table_test.rb b/actionpack/test/journey/gtg/transition_table_test.rb
index 889640fdd7..1f908c7c37 100644
--- a/actionpack/test/journey/gtg/transition_table_test.rb
+++ b/actionpack/test/journey/gtg/transition_table_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 require "active_support/json/decoding"
 
diff --git a/actionpack/test/journey/nfa/simulator_test.rb b/actionpack/test/journey/nfa/simulator_test.rb
index 38f99398cb..d3a216d4a5 100644
--- a/actionpack/test/journey/nfa/simulator_test.rb
+++ b/actionpack/test/journey/nfa/simulator_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 
 module ActionDispatch
diff --git a/actionpack/test/journey/nfa/transition_table_test.rb b/actionpack/test/journey/nfa/transition_table_test.rb
index 0bc6bc1cf8..264a8c2a37 100644
--- a/actionpack/test/journey/nfa/transition_table_test.rb
+++ b/actionpack/test/journey/nfa/transition_table_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 
 module ActionDispatch
diff --git a/actionpack/test/journey/nodes/symbol_test.rb b/actionpack/test/journey/nodes/symbol_test.rb
index baf60f40b8..d4e1753b4a 100644
--- a/actionpack/test/journey/nodes/symbol_test.rb
+++ b/actionpack/test/journey/nodes/symbol_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 
 module ActionDispatch
diff --git a/actionpack/test/journey/path/pattern_test.rb b/actionpack/test/journey/path/pattern_test.rb
index 2c74617944..716f2a352c 100644
--- a/actionpack/test/journey/path/pattern_test.rb
+++ b/actionpack/test/journey/path/pattern_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 
 module ActionDispatch
diff --git a/actionpack/test/journey/route/definition/parser_test.rb b/actionpack/test/journey/route/definition/parser_test.rb
index 8c6e3c0371..bbb521957f 100644
--- a/actionpack/test/journey/route/definition/parser_test.rb
+++ b/actionpack/test/journey/route/definition/parser_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 
 module ActionDispatch
diff --git a/actionpack/test/journey/route/definition/scanner_test.rb b/actionpack/test/journey/route/definition/scanner_test.rb
index 98578ddbf1..e39a4b41e2 100644
--- a/actionpack/test/journey/route/definition/scanner_test.rb
+++ b/actionpack/test/journey/route/definition/scanner_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 
 module ActionDispatch
diff --git a/actionpack/test/journey/route_test.rb b/actionpack/test/journey/route_test.rb
index 8fd73970b8..8c4d5fb0f8 100644
--- a/actionpack/test/journey/route_test.rb
+++ b/actionpack/test/journey/route_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 
 module ActionDispatch
diff --git a/actionpack/test/journey/router/utils_test.rb b/actionpack/test/journey/router/utils_test.rb
index 74277a4325..69b720afd5 100644
--- a/actionpack/test/journey/router/utils_test.rb
+++ b/actionpack/test/journey/router/utils_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 
 module ActionDispatch
diff --git a/actionpack/test/journey/router_test.rb b/actionpack/test/journey/router_test.rb
index f223a125a3..5399e2aa0b 100644
--- a/actionpack/test/journey/router_test.rb
+++ b/actionpack/test/journey/router_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 
 module ActionDispatch
diff --git a/actionpack/test/journey/routes_test.rb b/actionpack/test/journey/routes_test.rb
index d8db5ffad1..9759a3d692 100644
--- a/actionpack/test/journey/routes_test.rb
+++ b/actionpack/test/journey/routes_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 
 module ActionDispatch
diff --git a/actionpack/test/lib/controller/fake_controllers.rb b/actionpack/test/lib/controller/fake_controllers.rb
index 1a2863b689..a9a2003d19 100644
--- a/actionpack/test/lib/controller/fake_controllers.rb
+++ b/actionpack/test/lib/controller/fake_controllers.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 class ContentController < ActionController::Base; end
 
 module Admin
diff --git a/actionpack/test/lib/controller/fake_models.rb b/actionpack/test/lib/controller/fake_models.rb
index ff37d85ed8..8af297a5fd 100644
--- a/actionpack/test/lib/controller/fake_models.rb
+++ b/actionpack/test/lib/controller/fake_models.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "active_model"
 
 Customer = Struct.new(:name, :id) do
diff --git a/actionpack/test/routing/helper_test.rb b/actionpack/test/routing/helper_test.rb
index 0debacedf7..ce3434dd32 100644
--- a/actionpack/test/routing/helper_test.rb
+++ b/actionpack/test/routing/helper_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "abstract_unit"
 
 module ActionDispatch
author	Kir Shatrov <shatrov@me.com>	2017-06-22 22:59:18 -0400
committer	Kir Shatrov <shatrov@me.com>	2017-07-01 02:11:03 +0300
commit	cfade1ec7ee7b5b51f3c1578e3474f9c156f2971 (patch)
tree	5c12d112bf4d039587d712b0cae92a2d920fee23 /actionpack
parent	5fe2a4f929fff7fa725545c47ac0f9372d8c643d (diff)
download	rails-cfade1ec7ee7b5b51f3c1578e3474f9c156f2971.tar.gz rails-cfade1ec7ee7b5b51f3c1578e3474f9c156f2971.tar.bz2 rails-cfade1ec7ee7b5b51f3c1578e3474f9c156f2971.zip