applies new string literal convention in actionpack/lib

The current code base is not uniform. After some discussion,
we have chosen to go with double quotes by default.

22 files changed, 130 insertions, 130 deletions

diff --git a/actionpack/lib/action_controller/api.rb b/actionpack/lib/action_controller/api.rb
index 6bbebb7b4c..5cd8d77ddb 100644
--- a/actionpack/lib/action_controller/api.rb
+++ b/actionpack/lib/action_controller/api.rb
@@ -1,6 +1,6 @@
-require 'action_view'
-require 'action_controller'
-require 'action_controller/log_subscriber'
+require "action_view"
+require "action_controller"
+require "action_controller/log_subscriber"
 
 module ActionController
   # API Controller is a lightweight version of <tt>ActionController::Base</tt>,
diff --git a/actionpack/lib/action_controller/base.rb b/actionpack/lib/action_controller/base.rb
index 251289d4bb..2c7a223971 100644
--- a/actionpack/lib/action_controller/base.rb
+++ b/actionpack/lib/action_controller/base.rb
@@ -1,4 +1,4 @@
-require 'action_view'
+require "action_view"
 require "action_controller/log_subscriber"
 require "action_controller/metal/params_wrapper"
 
diff --git a/actionpack/lib/action_controller/metal.rb b/actionpack/lib/action_controller/metal.rb
index f6e67b02d7..197aaa90c7 100644
--- a/actionpack/lib/action_controller/metal.rb
+++ b/actionpack/lib/action_controller/metal.rb
@@ -1,7 +1,7 @@
-require 'active_support/core_ext/array/extract_options'
-require 'action_dispatch/middleware/stack'
-require 'action_dispatch/http/request'
-require 'action_dispatch/http/response'
+require "active_support/core_ext/array/extract_options"
+require "action_dispatch/middleware/stack"
+require "action_dispatch/http/request"
+require "action_dispatch/http/response"
 
 module ActionController
   # Extend ActionDispatch middleware stack to make it aware of options
@@ -130,7 +130,7 @@ module ActionController
     # ==== Returns
     # * <tt>string</tt>
     def self.controller_name
-      @controller_name ||= name.demodulize.sub(/Controller$/, '').underscore
+      @controller_name ||= name.demodulize.sub(/Controller$/, "").underscore
     end
 
     def self.make_response!(request)
diff --git a/actionpack/lib/action_controller/metal/conditional_get.rb b/actionpack/lib/action_controller/metal/conditional_get.rb
index e21449f376..abc102f30c 100644
--- a/actionpack/lib/action_controller/metal/conditional_get.rb
+++ b/actionpack/lib/action_controller/metal/conditional_get.rb
@@ -1,4 +1,4 @@
-require 'active_support/core_ext/hash/keys'
+require "active_support/core_ext/hash/keys"
 
 module ActionController
   module ConditionalGet
diff --git a/actionpack/lib/action_controller/metal/data_streaming.rb b/actionpack/lib/action_controller/metal/data_streaming.rb
index 6cd6130032..b598dd4d77 100644
--- a/actionpack/lib/action_controller/metal/data_streaming.rb
+++ b/actionpack/lib/action_controller/metal/data_streaming.rb
@@ -1,4 +1,4 @@
-require 'action_controller/metal/exceptions'
+require "action_controller/metal/exceptions"
 
 module ActionController #:nodoc:
   # Methods for sending arbitrary data and for streaming files to the browser,
@@ -8,8 +8,8 @@ module ActionController #:nodoc:
 
     include ActionController::Rendering
 
-    DEFAULT_SEND_FILE_TYPE        = 'application/octet-stream'.freeze #:nodoc:
-    DEFAULT_SEND_FILE_DISPOSITION = 'attachment'.freeze #:nodoc:
+    DEFAULT_SEND_FILE_TYPE        = "application/octet-stream".freeze #:nodoc:
+    DEFAULT_SEND_FILE_DISPOSITION = "attachment".freeze #:nodoc:
 
     protected
       # Sends the file. This uses a server-appropriate method (such as X-Sendfile)
@@ -122,7 +122,7 @@ module ActionController #:nodoc:
         else
           if !type_provided && options[:filename]
             # If type wasn't provided, try guessing from file extension.
-            content_type = Mime::Type.lookup_by_extension(File.extname(options[:filename]).downcase.delete('.')) || content_type
+            content_type = Mime::Type.lookup_by_extension(File.extname(options[:filename]).downcase.delete(".")) || content_type
           end
           self.content_type = content_type
         end
@@ -131,10 +131,10 @@ module ActionController #:nodoc:
         unless disposition.nil?
           disposition  = disposition.to_s
           disposition += %(; filename="#{options[:filename]}") if options[:filename]
-          headers['Content-Disposition'] = disposition
+          headers["Content-Disposition"] = disposition
         end
 
-        headers['Content-Transfer-Encoding'] = 'binary'
+        headers["Content-Transfer-Encoding"] = "binary"
 
         response.sending_file = true
 
diff --git a/actionpack/lib/action_controller/metal/exceptions.rb b/actionpack/lib/action_controller/metal/exceptions.rb
index 5c0ada37be..364af20b55 100644
--- a/actionpack/lib/action_controller/metal/exceptions.rb
+++ b/actionpack/lib/action_controller/metal/exceptions.rb
@@ -49,7 +49,7 @@ module ActionController
   end
 
   class SessionOverflowError < ActionControllerError #:nodoc:
-    DEFAULT_MESSAGE = 'Your session data is larger than the data column in which it is to be stored. You must increase the size of your data column if you intend to store large data.'
+    DEFAULT_MESSAGE = "Your session data is larger than the data column in which it is to be stored. You must increase the size of your data column if you intend to store large data."
 
     def initialize(message = nil)
       super(message || DEFAULT_MESSAGE)
diff --git a/actionpack/lib/action_controller/metal/force_ssl.rb b/actionpack/lib/action_controller/metal/force_ssl.rb
index ea8e91ce24..ff250b7094 100644
--- a/actionpack/lib/action_controller/metal/force_ssl.rb
+++ b/actionpack/lib/action_controller/metal/force_ssl.rb
@@ -1,5 +1,5 @@
-require 'active_support/core_ext/hash/except'
-require 'active_support/core_ext/hash/slice'
+require "active_support/core_ext/hash/except"
+require "active_support/core_ext/hash/slice"
 
 module ActionController
   # This module provides a method which will redirect the browser to use HTTPS
@@ -76,7 +76,7 @@ module ActionController
     def force_ssl_redirect(host_or_options = nil)
       unless request.ssl?
         options = {
-          :protocol => 'https://',
+          :protocol => "https://",
           :host     => request.host,
           :path     => request.fullpath,
           :status   => :moved_permanently
diff --git a/actionpack/lib/action_controller/metal/head.rb b/actionpack/lib/action_controller/metal/head.rb
index 5e9832fd4e..d4344dc7b3 100644
--- a/actionpack/lib/action_controller/metal/head.rb
+++ b/actionpack/lib/action_controller/metal/head.rb
@@ -18,7 +18,7 @@ module ActionController
     # See Rack::Utils::SYMBOL_TO_STATUS_CODE for a full list of valid +status+ symbols.
     def head(status, options = {})
       if status.is_a?(Hash)
-        msg = status[:status] ? 'The :status option' : 'The implicit :ok status'
+        msg = status[:status] ? "The :status option" : "The implicit :ok status"
         options, status = status, status.delete(:status)
 
         ActiveSupport::Deprecation.warn(<<-MSG.squish)
@@ -33,7 +33,7 @@ module ActionController
       content_type = options.delete(:content_type)
 
       options.each do |key, value|
-        headers[key.to_s.dasherize.split('-').each { |v| v[0] = v[0].chr.upcase }.join('-')] = value.to_s
+        headers[key.to_s.dasherize.split("-").each { |v| v[0] = v[0].chr.upcase }.join("-")] = value.to_s
       end
 
       self.status = status
diff --git a/actionpack/lib/action_controller/metal/http_authentication.rb b/actionpack/lib/action_controller/metal/http_authentication.rb
index 4639348509..d10ba5d635 100644
--- a/actionpack/lib/action_controller/metal/http_authentication.rb
+++ b/actionpack/lib/action_controller/metal/http_authentication.rb
@@ -1,5 +1,5 @@
-require 'base64'
-require 'active_support/security_utils'
+require "base64"
+require "active_support/security_utils"
 
 module ActionController
   # Makes it dead easy to do HTTP Basic, Digest and Token authentication.
@@ -99,23 +99,23 @@ module ActionController
       end
 
       def has_basic_credentials?(request)
-        request.authorization.present? && (auth_scheme(request).downcase == 'basic')
+        request.authorization.present? && (auth_scheme(request).downcase == "basic")
       end
 
       def user_name_and_password(request)
-        decode_credentials(request).split(':', 2)
+        decode_credentials(request).split(":", 2)
       end
 
       def decode_credentials(request)
-        ::Base64.decode64(auth_param(request) || '')
+        ::Base64.decode64(auth_param(request) || "")
       end
 
       def auth_scheme(request)
-        request.authorization.to_s.split(' ', 2).first
+        request.authorization.to_s.split(" ", 2).first
       end
 
       def auth_param(request)
-        request.authorization.to_s.split(' ', 2).second
+        request.authorization.to_s.split(" ", 2).second
       end
 
       def encode_credentials(user_name, password)
@@ -208,7 +208,7 @@ module ActionController
           password = password_procedure.call(credentials[:username])
           return false unless password
 
-          method = request.get_header('rack.methodoverride.original_method') || request.get_header('REQUEST_METHOD')
+          method = request.get_header("rack.methodoverride.original_method") || request.get_header("REQUEST_METHOD")
           uri    = credentials[:uri]
 
           [true, false].any? do |trailing_question_mark|
@@ -226,17 +226,17 @@ module ActionController
       # of a plain-text password.
       def expected_response(http_method, uri, credentials, password, password_is_ha1=true)
         ha1 = password_is_ha1 ? password : ha1(credentials, password)
-        ha2 = ::Digest::MD5.hexdigest([http_method.to_s.upcase, uri].join(':'))
-        ::Digest::MD5.hexdigest([ha1, credentials[:nonce], credentials[:nc], credentials[:cnonce], credentials[:qop], ha2].join(':'))
+        ha2 = ::Digest::MD5.hexdigest([http_method.to_s.upcase, uri].join(":"))
+        ::Digest::MD5.hexdigest([ha1, credentials[:nonce], credentials[:nc], credentials[:cnonce], credentials[:qop], ha2].join(":"))
       end
 
       def ha1(credentials, password)
-        ::Digest::MD5.hexdigest([credentials[:username], credentials[:realm], password].join(':'))
+        ::Digest::MD5.hexdigest([credentials[:username], credentials[:realm], password].join(":"))
       end
 
       def encode_credentials(http_method, credentials, password, password_is_ha1)
         credentials[:response] = expected_response(http_method, credentials[:uri], credentials, password, password_is_ha1)
-        "Digest " + credentials.sort_by {|x| x[0].to_s }.map {|v| "#{v[0]}='#{v[1]}'" }.join(', ')
+        "Digest " + credentials.sort_by {|x| x[0].to_s }.map {|v| "#{v[0]}='#{v[1]}'" }.join(", ")
       end
 
       def decode_credentials_header(request)
@@ -244,9 +244,9 @@ module ActionController
       end
 
       def decode_credentials(header)
-        ActiveSupport::HashWithIndifferentAccess[header.to_s.gsub(/^Digest\s+/, '').split(',').map do |pair|
-          key, value = pair.split('=', 2)
-          [key.strip, value.to_s.gsub(/^"|"$/,'').delete('\'')]
+        ActiveSupport::HashWithIndifferentAccess[header.to_s.gsub(/^Digest\s+/, "").split(",").map do |pair|
+          key, value = pair.split("=", 2)
+          [key.strip, value.to_s.gsub(/^"|"$/,"").delete('\'')]
         end]
       end
 
@@ -406,7 +406,7 @@ module ActionController
     #
     #   RewriteRule ^(.*)$ dispatch.fcgi [E=X-HTTP_AUTHORIZATION:%{HTTP:Authorization},QSA,L]
     module Token
-      TOKEN_KEY = 'token='
+      TOKEN_KEY = "token="
       TOKEN_REGEX = /^(Token|Bearer)\s+/
       AUTHN_PAIR_DELIMITERS = /(?:,|;|\t+)/
       extend self
@@ -476,14 +476,14 @@ module ActionController
 
       # This removes the <tt>"</tt> characters wrapping the value.
       def rewrite_param_values(array_params)
-        array_params.each { |param| (param[1] || "").gsub! %r/^"|"$/, '' }
+        array_params.each { |param| (param[1] || "").gsub! %r/^"|"$/, "" }
       end
 
       # This method takes an authorization body and splits up the key-value
       # pairs by the standardized <tt>:</tt>, <tt>;</tt>, or <tt>\t</tt>
       # delimiters defined in +AUTHN_PAIR_DELIMITERS+.
       def raw_params(auth)
-        _raw_params = auth.sub(TOKEN_REGEX, '').split(/\s*#{AUTHN_PAIR_DELIMITERS}\s*/)
+        _raw_params = auth.sub(TOKEN_REGEX, "").split(/\s*#{AUTHN_PAIR_DELIMITERS}\s*/)
 
         if !(_raw_params.first =~ %r{\A#{TOKEN_KEY}})
           _raw_params[0] = "#{TOKEN_KEY}#{_raw_params.first}"
diff --git a/actionpack/lib/action_controller/metal/implicit_render.rb b/actionpack/lib/action_controller/metal/implicit_render.rb
index 6192fc0f9c..b76291d927 100644
--- a/actionpack/lib/action_controller/metal/implicit_render.rb
+++ b/actionpack/lib/action_controller/metal/implicit_render.rb
@@ -1,4 +1,4 @@
-require 'active_support/core_ext/string/strip'
+require "active_support/core_ext/string/strip"
 
 module ActionController
   # Handles implicit rendering for a controller action that does not
diff --git a/actionpack/lib/action_controller/metal/instrumentation.rb b/actionpack/lib/action_controller/metal/instrumentation.rb
index 624a6d5b76..bb802524b4 100644
--- a/actionpack/lib/action_controller/metal/instrumentation.rb
+++ b/actionpack/lib/action_controller/metal/instrumentation.rb
@@ -1,5 +1,5 @@
-require 'benchmark'
-require 'abstract_controller/logger'
+require "benchmark"
+require "abstract_controller/logger"
 
 module ActionController
   # Adds instrumentation to several ends in ActionController::Base. It also provides
diff --git a/actionpack/lib/action_controller/metal/live.rb b/actionpack/lib/action_controller/metal/live.rb
index 5d395cd8bd..1839230ffb 100644
--- a/actionpack/lib/action_controller/metal/live.rb
+++ b/actionpack/lib/action_controller/metal/live.rb
@@ -1,6 +1,6 @@
-require 'action_dispatch/http/response'
-require 'delegate'
-require 'active_support/json'
+require "action_dispatch/http/response"
+require "delegate"
+require "active_support/json"
 
 module ActionController
   # Mix this module into your controller, and all actions in that controller
diff --git a/actionpack/lib/action_controller/metal/mime_responds.rb b/actionpack/lib/action_controller/metal/mime_responds.rb
index 2e89af1a5e..0d998632fc 100644
--- a/actionpack/lib/action_controller/metal/mime_responds.rb
+++ b/actionpack/lib/action_controller/metal/mime_responds.rb
@@ -1,4 +1,4 @@
-require 'abstract_controller/collector'
+require "abstract_controller/collector"
 
 module ActionController #:nodoc:
   module MimeResponds
diff --git a/actionpack/lib/action_controller/metal/params_wrapper.rb b/actionpack/lib/action_controller/metal/params_wrapper.rb
index c38fc40b81..4cfea386e6 100644
--- a/actionpack/lib/action_controller/metal/params_wrapper.rb
+++ b/actionpack/lib/action_controller/metal/params_wrapper.rb
@@ -1,7 +1,7 @@
-require 'active_support/core_ext/hash/slice'
-require 'active_support/core_ext/hash/except'
-require 'active_support/core_ext/module/anonymous'
-require 'action_dispatch/http/mime_type'
+require "active_support/core_ext/hash/slice"
+require "active_support/core_ext/hash/except"
+require "active_support/core_ext/module/anonymous"
+require "action_dispatch/http/mime_type"
 
 module ActionController
   # Wraps the parameters hash into a nested hash. This will allow clients to
@@ -71,7 +71,7 @@ module ActionController
 
     EXCLUDE_PARAMETERS = %w(authenticity_token _method utf8)
 
-    require 'mutex_m'
+    require "mutex_m"
 
     class Options < Struct.new(:name, :format, :include, :exclude, :klass, :model) # :nodoc:
       include Mutex_m
@@ -137,7 +137,7 @@ module ActionController
       # try to find Foo::Bar::User, Foo::User and finally User.
       def _default_wrap_model #:nodoc:
         return nil if klass.anonymous?
-        model_name = klass.name.sub(/Controller$/, '').classify
+        model_name = klass.name.sub(/Controller$/, "").classify
 
         begin
           if model_klass = model_name.safe_constantize
diff --git a/actionpack/lib/action_controller/metal/renderers.rb b/actionpack/lib/action_controller/metal/renderers.rb
index 1735609cd9..b86fe8ceb4 100644
--- a/actionpack/lib/action_controller/metal/renderers.rb
+++ b/actionpack/lib/action_controller/metal/renderers.rb
@@ -1,4 +1,4 @@
-require 'set'
+require "set"
 
 module ActionController
   # See <tt>Renderers.add</tt>
diff --git a/actionpack/lib/action_controller/metal/rendering.rb b/actionpack/lib/action_controller/metal/rendering.rb
index cce6fe7787..d99486f29b 100644
--- a/actionpack/lib/action_controller/metal/rendering.rb
+++ b/actionpack/lib/action_controller/metal/rendering.rb
@@ -1,4 +1,4 @@
-require 'active_support/core_ext/string/filters'
+require "active_support/core_ext/string/filters"
 
 module ActionController
   module Rendering
@@ -49,7 +49,7 @@ module ActionController
     end
 
     def render_to_body(options = {})
-      super || _render_in_priorities(options) || ' '
+      super || _render_in_priorities(options) || " "
     end
 
     private
diff --git a/actionpack/lib/action_controller/metal/request_forgery_protection.rb b/actionpack/lib/action_controller/metal/request_forgery_protection.rb
index fd7ffcfcd7..a6e24ded9e 100644
--- a/actionpack/lib/action_controller/metal/request_forgery_protection.rb
+++ b/actionpack/lib/action_controller/metal/request_forgery_protection.rb
@@ -1,6 +1,6 @@
-require 'rack/session/abstract/id'
-require 'action_controller/metal/exceptions'
-require 'active_support/security_utils'
+require "rack/session/abstract/id"
+require "action_controller/metal/exceptions"
+require "active_support/security_utils"
 
 module ActionController #:nodoc:
   class InvalidAuthenticityToken < ActionControllerError #:nodoc:
@@ -133,7 +133,7 @@ module ActionController #:nodoc:
       def protection_method_class(name)
         ActionController::RequestForgeryProtection::ProtectionMethods.const_get(name.to_s.classify)
       rescue NameError
-        raise ArgumentError, 'Invalid request forgery protection method, use :null_session, :exception, or :reset_session'
+        raise ArgumentError, "Invalid request forgery protection method, use :null_session, :exception, or :reset_session"
       end
     end
 
@@ -382,7 +382,7 @@ module ActionController #:nodoc:
       def xor_byte_strings(s1, s2)
         s2_bytes = s2.bytes
         s1.each_byte.with_index { |c1, i| s2_bytes[i] ^= c1 }
-        s2_bytes.pack('C*')
+        s2_bytes.pack("C*")
       end
 
       # The form's authenticity parameter. Override to provide your own.
@@ -408,7 +408,7 @@ module ActionController #:nodoc:
 
       def normalize_action_path(action_path)
         uri = URI.parse(action_path)
-        uri.path.chomp('/')
+        uri.path.chomp("/")
       end
   end
 end
diff --git a/actionpack/lib/action_controller/metal/rescue.rb b/actionpack/lib/action_controller/metal/rescue.rb
index 17f4030f25..2d99e4045b 100644
--- a/actionpack/lib/action_controller/metal/rescue.rb
+++ b/actionpack/lib/action_controller/metal/rescue.rb
@@ -19,7 +19,7 @@ module ActionController #:nodoc:
       def process_action(*args)
         super
       rescue Exception => exception
-        request.env['action_dispatch.show_detailed_exceptions'] ||= show_detailed_exceptions?
+        request.env["action_dispatch.show_detailed_exceptions"] ||= show_detailed_exceptions?
         rescue_with_handler(exception) || raise
       end
   end
diff --git a/actionpack/lib/action_controller/metal/streaming.rb b/actionpack/lib/action_controller/metal/streaming.rb
index a6115674aa..481f19f1ef 100644
--- a/actionpack/lib/action_controller/metal/streaming.rb
+++ b/actionpack/lib/action_controller/metal/streaming.rb
@@ -1,4 +1,4 @@
-require 'rack/chunked'
+require "rack/chunked"
 
 module ActionController #:nodoc:
   # Allows views to be streamed back to the client as they are rendered.
diff --git a/actionpack/lib/action_controller/metal/strong_parameters.rb b/actionpack/lib/action_controller/metal/strong_parameters.rb
index f101c7b836..32ab8ca2ac 100644
--- a/actionpack/lib/action_controller/metal/strong_parameters.rb
+++ b/actionpack/lib/action_controller/metal/strong_parameters.rb
@@ -1,13 +1,13 @@
-require 'active_support/core_ext/hash/indifferent_access'
-require 'active_support/core_ext/hash/transform_values'
-require 'active_support/core_ext/array/wrap'
-require 'active_support/core_ext/string/filters'
-require 'active_support/rescuable'
-require 'action_dispatch/http/upload'
-require 'rack/test'
-require 'stringio'
-require 'set'
-require 'yaml'
+require "active_support/core_ext/hash/indifferent_access"
+require "active_support/core_ext/hash/transform_values"
+require "active_support/core_ext/array/wrap"
+require "active_support/core_ext/string/filters"
+require "active_support/rescuable"
+require "action_dispatch/http/upload"
+require "rack/test"
+require "stringio"
+require "set"
+require "yaml"
 
 module ActionController
   # Raised when a required parameter is missing.
@@ -596,26 +596,26 @@ module ActionController
       # Wire up YAML format compatibility with Rails 4.2 and Psych 2.0.8 and 2.0.9+.
       # Makes the YAML parser call `init_with` when it encounters the keys below
       # instead of trying its own parsing routines.
-      YAML.load_tags['!ruby/hash-with-ivars:ActionController::Parameters'] = name
-      YAML.load_tags['!ruby/hash:ActionController::Parameters'] = name
+      YAML.load_tags["!ruby/hash-with-ivars:ActionController::Parameters"] = name
+      YAML.load_tags["!ruby/hash:ActionController::Parameters"] = name
     end
     hook_into_yaml_loading
 
     def init_with(coder) # :nodoc:
       case coder.tag
-      when '!ruby/hash:ActionController::Parameters'
+      when "!ruby/hash:ActionController::Parameters"
         # YAML 2.0.8's format where hash instance variables weren't stored.
         @parameters = coder.map.with_indifferent_access
         @permitted  = false
-      when '!ruby/hash-with-ivars:ActionController::Parameters'
+      when "!ruby/hash-with-ivars:ActionController::Parameters"
         # YAML 2.0.9's Hash subclass format where keys and values
         # were stored under an elements hash and `permitted` within an ivars hash.
-        @parameters = coder.map['elements'].with_indifferent_access
-        @permitted  = coder.map['ivars'][:@permitted]
-      when '!ruby/object:ActionController::Parameters'
+        @parameters = coder.map["elements"].with_indifferent_access
+        @permitted  = coder.map["ivars"][:@permitted]
+      when "!ruby/object:ActionController::Parameters"
         # YAML's Object format. Only needed because of the format
         # backwardscompability above, otherwise equivalent to YAML's initialization.
-        @parameters, @permitted = coder.map['parameters'], coder.map['permitted']
+        @parameters, @permitted = coder.map["parameters"], coder.map["permitted"]
       end
     end
 
diff --git a/actionpack/lib/action_controller/renderer.rb b/actionpack/lib/action_controller/renderer.rb
index a8c8d66682..0739f16965 100644
--- a/actionpack/lib/action_controller/renderer.rb
+++ b/actionpack/lib/action_controller/renderer.rb
@@ -1,4 +1,4 @@
-require 'active_support/core_ext/hash/keys'
+require "active_support/core_ext/hash/keys"
 
 module ActionController
   # ActionController::Renderer allows you to render arbitrary templates
@@ -37,11 +37,11 @@ module ActionController
     attr_reader :defaults, :controller
 
     DEFAULTS = {
-      http_host: 'example.org',
+      http_host: "example.org",
       https: false,
-      method: 'get',
-      script_name: '',
-      input: ''
+      method: "get",
+      script_name: "",
+      input: ""
     }.freeze
 
     # Create a new renderer instance for a specific controller class.
@@ -69,7 +69,7 @@ module ActionController
 
     # Render templates with any options from ActionController::Base#render_to_string.
     def render(*args)
-      raise 'missing controller' unless controller
+      raise "missing controller" unless controller
 
       request = ActionDispatch::Request.new @env
       request.routes = controller._routes
@@ -88,17 +88,17 @@ module ActionController
       end
 
       RACK_KEY_TRANSLATION = {
-        http_host:   'HTTP_HOST',
-        https:       'HTTPS',
-        method:      'REQUEST_METHOD',
-        script_name: 'SCRIPT_NAME',
-        input:       'rack.input'
+        http_host:   "HTTP_HOST",
+        https:       "HTTPS",
+        method:      "REQUEST_METHOD",
+        script_name: "SCRIPT_NAME",
+        input:       "rack.input"
       }
 
       IDENTITY = ->(_) { _ }
 
       RACK_VALUE_TRANSLATION = {
-        https: ->(v) { v ? 'on' : 'off' },
+        https: ->(v) { v ? "on" : "off" },
         method: ->(v) { v.upcase },
       }
 
diff --git a/actionpack/lib/action_controller/test_case.rb b/actionpack/lib/action_controller/test_case.rb
index 6c5d7b5e37..42c2e111b1 100644
--- a/actionpack/lib/action_controller/test_case.rb
+++ b/actionpack/lib/action_controller/test_case.rb
@@ -1,10 +1,10 @@
-require 'rack/session/abstract/id'
-require 'active_support/core_ext/hash/conversions'
-require 'active_support/core_ext/object/to_query'
-require 'active_support/core_ext/module/anonymous'
-require 'active_support/core_ext/hash/keys'
-require 'action_controller/template_assertions'
-require 'rails-dom-testing'
+require "rack/session/abstract/id"
+require "active_support/core_ext/hash/conversions"
+require "active_support/core_ext/object/to_query"
+require "active_support/core_ext/module/anonymous"
+require "active_support/core_ext/hash/keys"
+require "action_controller/template_assertions"
+require "rails-dom-testing"
 
 module ActionController
   # :stopdoc:
@@ -27,7 +27,7 @@ module ActionController
   # Please use ActionDispatch::IntegrationTest going forward.
   class TestRequest < ActionDispatch::TestRequest #:nodoc:
     DEFAULT_ENV = ActionDispatch::TestRequest::DEFAULT_ENV.dup
-    DEFAULT_ENV.delete 'PATH_INFO'
+    DEFAULT_ENV.delete "PATH_INFO"
 
     def self.new_session
       TestSession.new
@@ -52,7 +52,7 @@ module ActionController
       self.session = session
       self.session_options = TestSession::DEFAULT_OPTIONS
       @custom_param_parsers = {
-        xml: lambda { |raw_post| Hash.from_xml(raw_post)['hash'] }
+        xml: lambda { |raw_post| Hash.from_xml(raw_post)["hash"] }
       }
     end
 
@@ -61,7 +61,7 @@ module ActionController
     end
 
     def content_type=(type)
-      set_header 'CONTENT_TYPE', type
+      set_header "CONTENT_TYPE", type
     end
 
     def assign_parameters(routes, controller_path, action, parameters, generated_path, query_string_keys)
@@ -91,8 +91,8 @@ module ActionController
           self.content_type = ENCODER.content_type
           data = ENCODER.build_multipart non_path_parameters
         else
-          fetch_header('CONTENT_TYPE') do |k|
-            set_header k, 'application/x-www-form-urlencoded'
+          fetch_header("CONTENT_TYPE") do |k|
+            set_header k, "application/x-www-form-urlencoded"
           end
 
           case content_mime_type.to_sym
@@ -110,8 +110,8 @@ module ActionController
           end
         end
 
-        set_header 'CONTENT_LENGTH', data.length.to_s
-        set_header 'rack.input', StringIO.new(data)
+        set_header "CONTENT_LENGTH", data.length.to_s
+        set_header "rack.input", StringIO.new(data)
       end
 
       fetch_header("PATH_INFO") do |k|
@@ -419,11 +419,11 @@ module ActionController
           `get :index, xhr: true` and `post :create, xhr: true`
         MSG
 
-        @request.env['HTTP_X_REQUESTED_WITH'] = 'XMLHttpRequest'
-        @request.env['HTTP_ACCEPT'] ||= [Mime[:js], Mime[:html], Mime[:xml], 'text/xml', '*/*'].join(', ')
+        @request.env["HTTP_X_REQUESTED_WITH"] = "XMLHttpRequest"
+        @request.env["HTTP_ACCEPT"] ||= [Mime[:js], Mime[:html], Mime[:xml], "text/xml", "*/*"].join(", ")
         __send__(*args).tap do
-          @request.env.delete 'HTTP_X_REQUESTED_WITH'
-          @request.env.delete 'HTTP_ACCEPT'
+          @request.env.delete "HTTP_X_REQUESTED_WITH"
+          @request.env.delete "HTTP_ACCEPT"
         end
       end
       alias xhr :xml_http_request
@@ -465,7 +465,7 @@ module ActionController
           http_method, parameters, session, flash = args
           format = nil
 
-          if parameters.is_a?(String) && http_method != 'HEAD'
+          if parameters.is_a?(String) && http_method != "HEAD"
             body = parameters
             parameters = nil
           end
@@ -476,7 +476,7 @@ module ActionController
         end
 
         if body
-          @request.set_header 'RAW_POST_DATA', body
+          @request.set_header "RAW_POST_DATA", body
         end
 
         if http_method
@@ -495,15 +495,15 @@ module ActionController
 
         self.cookies.update @request.cookies
         self.cookies.update_cookies_from_jar
-        @request.set_header 'HTTP_COOKIE', cookies.to_header
-        @request.delete_header 'action_dispatch.cookies'
+        @request.set_header "HTTP_COOKIE", cookies.to_header
+        @request.delete_header "action_dispatch.cookies"
 
         @request          = TestRequest.new scrub_env!(@request.env), @request.session
         @response         = build_response @response_klass
         @response.request = @request
         @controller.recycle!
 
-        @request.set_header 'REQUEST_METHOD', http_method
+        @request.set_header "REQUEST_METHOD", http_method
 
         parameters = parameters.symbolize_keys
 
@@ -517,9 +517,9 @@ module ActionController
         @request.flash.update(flash || {})
 
         if xhr
-          @request.set_header 'HTTP_X_REQUESTED_WITH', 'XMLHttpRequest'
-          @request.fetch_header('HTTP_ACCEPT') do |k|
-            @request.set_header k, [Mime[:js], Mime[:html], Mime[:xml], 'text/xml', '*/*'].join(', ')
+          @request.set_header "HTTP_X_REQUESTED_WITH", "XMLHttpRequest"
+          @request.fetch_header("HTTP_ACCEPT") do |k|
+            @request.set_header k, [Mime[:js], Mime[:html], Mime[:xml], "text/xml", "*/*"].join(", ")
           end
         end
 
@@ -534,7 +534,7 @@ module ActionController
           @request = @controller.request
           @response = @controller.response
 
-          @request.delete_header 'HTTP_COOKIE'
+          @request.delete_header "HTTP_COOKIE"
 
           if @request.have_cookie_jar?
             unless @request.cookie_jar.committed?
@@ -545,16 +545,16 @@ module ActionController
           @response.prepare!
 
           if flash_value = @request.flash.to_session_value
-            @request.session['flash'] = flash_value
+            @request.session["flash"] = flash_value
           else
-            @request.session.delete('flash')
+            @request.session.delete("flash")
           end
 
           if xhr
-            @request.delete_header 'HTTP_X_REQUESTED_WITH'
-            @request.delete_header 'HTTP_ACCEPT'
+            @request.delete_header "HTTP_X_REQUESTED_WITH"
+            @request.delete_header "HTTP_ACCEPT"
           end
-          @request.query_string = ''
+          @request.query_string = ""
 
           @response.sent!
         end
@@ -618,9 +618,9 @@ module ActionController
       def scrub_env!(env)
         env.delete_if { |k, v| k =~ /^(action_dispatch|rack)\.request/ }
         env.delete_if { |k, v| k =~ /^action_dispatch\.rescue/ }
-        env.delete 'action_dispatch.request.query_parameters'
-        env.delete 'action_dispatch.request.request_parameters'
-        env['rack.input'] = StringIO.new
+        env.delete "action_dispatch.request.query_parameters"
+        env.delete "action_dispatch.request.request_parameters"
+        env["rack.input"] = StringIO.new
         env
       end
 
@@ -672,7 +672,7 @@ module ActionController
 
       def html_format?(parameters)
         return true unless parameters.key?(:format)
-        Mime.fetch(parameters[:format]) { Mime['html'] }.html?
+        Mime.fetch(parameters[:format]) { Mime["html"] }.html?
       end
     end