Freeze all string literals in source, fixes #2741

Tests pass and smoke test works perfectly.

lib/sidekiq.rb

@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 # encoding: utf-8
 require 'sidekiq/version'
 fail "Sidekiq #{Sidekiq::VERSION} does not support Ruby 1.9." if RUBY_PLATFORM != 'java' && RUBY_VERSION < '2.0.0'

lib/sidekiq/api.rb

@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 # encoding: utf-8
 require 'sidekiq'
 

lib/sidekiq/cli.rb

@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 # encoding: utf-8
 $stdout.sync = true
 

lib/sidekiq/client.rb

@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require 'securerandom'
 require 'sidekiq/middleware/chain'
 

lib/sidekiq/core_ext.rb

@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 begin
   require 'active_support/core_ext/class/attribute'
 rescue LoadError

lib/sidekiq/exception_handler.rb

@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require 'sidekiq'
 
 module Sidekiq

lib/sidekiq/extensions/action_mailer.rb

@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require 'sidekiq/extensions/generic_proxy'
 
 module Sidekiq

lib/sidekiq/extensions/active_record.rb

@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require 'sidekiq/extensions/generic_proxy'
 
 module Sidekiq

lib/sidekiq/extensions/class_methods.rb

@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require 'sidekiq/extensions/generic_proxy'
 
 module Sidekiq

lib/sidekiq/extensions/generic_proxy.rb

@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require 'yaml'
 
 module Sidekiq

lib/sidekiq/fetch.rb

@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require 'sidekiq'
 
 module Sidekiq

lib/sidekiq/launcher.rb

@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 # encoding: utf-8
 require 'sidekiq/manager'
 require 'sidekiq/fetch'

lib/sidekiq/logging.rb

@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require 'time'
 require 'logger'
 

lib/sidekiq/manager.rb

@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 # encoding: utf-8
 require 'sidekiq/util'
 require 'sidekiq/processor'

lib/sidekiq/middleware/chain.rb

@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 module Sidekiq
   # Middleware is code configured to run before/after
   # a message is processed.  It is patterned after Rack

lib/sidekiq/middleware/i18n.rb

@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 #
 # Simple middleware to save the current locale and restore it when the job executes.
 # Use it by requiring it in your initializer:

lib/sidekiq/paginator.rb

@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 module Sidekiq
   module Paginator
 

lib/sidekiq/processor.rb

@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require 'sidekiq/util'
 require 'sidekiq/fetch'
 require 'thread'

lib/sidekiq/rails.rb

@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 module Sidekiq
   def self.hook_rails!
     return if defined?(@delay_removed)

lib/sidekiq/redis_connection.rb

@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require 'connection_pool'
 require 'redis'
 require 'uri'

lib/sidekiq/scheduled.rb

@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require 'sidekiq'
 require 'sidekiq/util'
 require 'sidekiq/api'

lib/sidekiq/testing.rb

@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require 'securerandom'
 require 'sidekiq'
 

lib/sidekiq/testing/inline.rb

@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require 'sidekiq/testing'
 
 ##

lib/sidekiq/util.rb

@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require 'socket'
 require 'securerandom'
 require 'sidekiq/exception_handler'

lib/sidekiq/version.rb

@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 module Sidekiq
   VERSION = "4.0.2"
 end

lib/sidekiq/web.rb

@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require 'erb'
 require 'yaml'
 require 'sinatra/base'

lib/sidekiq/web_helpers.rb

@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require 'uri'
 
 module Sidekiq

lib/sidekiq/worker.rb

@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require 'sidekiq/client'
 require 'sidekiq/core_ext'
 

test/fake_env.rb

@@ -0,0 +1 @@
+# frozen_string_literal: true

test/helper.rb

@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 $TESTING = true
 # disable minitest/parallel threads
 ENV["N"] = "0"

test/test_actors.rb

@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require_relative 'helper'
 require 'sidekiq/cli'
 require 'sidekiq/fetch'

test/test_api.rb

@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require_relative 'helper'
 require 'sidekiq/api'
 require 'active_job'

test/test_cli.rb

@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require_relative 'helper'
 require 'sidekiq/cli'
 require 'tempfile'

test/test_client.rb

@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require_relative 'helper'
 
 class TestClient < Sidekiq::Test

test/test_exception_handler.rb

@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require_relative 'helper'
 require 'sidekiq/exception_handler'
 require 'stringio'

test/test_extensions.rb

@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require_relative 'helper'
 require 'sidekiq'
 require 'active_record'

test/test_fetch.rb

@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require_relative 'helper'
 require 'sidekiq/fetch'
 

test/test_launcher.rb

@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require_relative 'helper'
 require 'sidekiq/launcher'
 

test/test_logging.rb

@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require_relative 'helper'
 require 'sidekiq/logging'
 

test/test_manager.rb

@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require_relative 'helper'
 require 'sidekiq/manager'
 

test/test_middleware.rb

@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require_relative 'helper'
 require 'sidekiq/middleware/chain'
 require 'sidekiq/processor'

test/test_processor.rb

@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require_relative 'helper'
 require 'sidekiq/fetch'
 require 'sidekiq/cli'

test/test_rails.rb

@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require_relative 'helper'
 
 $HAS_AJ = true

test/test_redis_connection.rb

@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require_relative 'helper'
 
 class TestRedisConnection < Sidekiq::Test

test/test_retry.rb

@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 # encoding: utf-8
 require_relative 'helper'
 require 'sidekiq/scheduled'

test/test_scheduled.rb

@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require_relative 'helper'
 require 'sidekiq/scheduled'
 

test/test_scheduling.rb

@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require_relative 'helper'
 require 'sidekiq/scheduled'
 

test/test_sidekiq.rb

@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 # encoding: utf-8
 require_relative 'helper'
 

test/test_testing.rb

@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require_relative 'helper'
 
 require 'active_record'

test/test_testing_fake.rb

@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require_relative 'helper'
 
 require 'active_record'

test/test_testing_inline.rb

@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require_relative 'helper'
 
 require 'active_record'

test/test_util.rb

@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require_relative 'helper'
 
 class TestUtil < Sidekiq::Test

test/test_web.rb

@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 # encoding: utf-8
 require_relative 'helper'
 require 'sidekiq/web'

test/test_web_helpers.rb

@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require_relative 'helper'
 
 class TestWebHelpers < Sidekiq::Test