Fix the test mocks

Conflicts:
	lib/action_cable/channel/streams.rb
	test/channel/stream_test.rb
	test/connection/identifier_test.rb
	test/connection/string_identifier_test.rb
	test/test_helper.rb

lib/action_cable/connection/base.rb

@@ -48,8 +48,8 @@ module ActionCable
       include InternalChannel
       include Authorization
 
-      attr_reader :server, :env
-      delegate :worker_pool, :pubsub, to: :server
+      attr_reader :server, :env, :pubsub
+      delegate :worker_pool, to: :server
 
       attr_reader :logger
 
@@ -62,6 +62,8 @@ module ActionCable
         @subscriptions  = ActionCable::Connection::Subscriptions.new(self)
         @message_buffer = ActionCable::Connection::MessageBuffer.new(self)
 
+        @pubsub = server.pubsub_pool.sample
+
         @started_at = Time.now
       end
 
@@ -122,7 +124,6 @@ module ActionCable
         transmit ActiveSupport::JSON.encode(identifier: '_ping', message: Time.now.to_i)
       end
 
-
       protected
         # The request that initiated the WebSocket connection is available here. This gives access to the environment, cookies, etc.
         def request

lib/action_cable/server/base.rb

@@ -47,14 +47,18 @@ module ActionCable
         end
       end
 
-      # The redis pubsub adapter used for all streams/broadcasting.
-      def pubsub
-        @pubsub ||= redis.pubsub
+      # The redis pubsub pool used for all streams/broadcasting.
+      def pubsub_pool
+        @pubsub_pool ||= redis_pool.map { |redis| redis.pubsub }
       end
 
-      # The EventMachine Redis instance used by the pubsub adapter.
-      def redis
-        @redis ||= EM::Hiredis.connect(config.redis[:url]).tap do |redis|
+      # The EventMachine Redis pool used by the pubsub adapter.
+      def redis_pool
+        @redis_pool ||= Array.new(config.redis_pool_size) { initialize_redis }
+      end
+
+      def initialize_redis
+        EM::Hiredis.connect(config.redis[:url]).tap do |redis|
           redis.on(:reconnect_failed) do
             logger.info "[ActionCable] Redis reconnect failed."
             # logger.info "[ActionCable] Redis reconnected. Closing all the open connections."

lib/action_cable/server/configuration.rb

@@ -6,7 +6,7 @@ module ActionCable
     # in a Rails config initializer.
     class Configuration
       attr_accessor :logger, :log_tags
-      attr_accessor :connection_class, :worker_pool_size
+      attr_accessor :connection_class, :worker_pool_size, :redis_pool_size
       attr_accessor :redis_path, :channels_path
       attr_accessor :disable_request_forgery_protection, :allowed_request_origins
 
@@ -16,6 +16,7 @@ module ActionCable
 
         @connection_class  = ApplicationCable::Connection
         @worker_pool_size  = 100
+        @redis_pool_size   = 20
 
         @redis_path    = Rails.root.join('config/redis/cable.yml')
         @channels_path = Rails.root.join('app/channels')

test/connection/identifier_test.rb

@@ -6,6 +6,7 @@ class ActionCable::Connection::IdentifierTest < ActionCable::TestCase
   class Connection < ActionCable::Connection::Base
     identified_by :current_user
     attr_reader :websocket
+    attr_writer :pubsub
 
     public :process_internal_message
 
@@ -28,7 +29,7 @@ class ActionCable::Connection::IdentifierTest < ActionCable::TestCase
       pubsub.expects(:unsubscribe_proc).with('action_cable/User#lifo', kind_of(Proc))
 
       server = TestServer.new
-      server.stubs(:pubsub).returns(pubsub)
+      server.stubs(:pubsub_pool).returns([ pubsub ])
 
       open_connection server: server
       close_connection
@@ -58,7 +59,7 @@ class ActionCable::Connection::IdentifierTest < ActionCable::TestCase
   protected
     def open_connection_with_stubbed_pubsub
       server = TestServer.new
-      server.stubs(:pubsub).returns(stub_everything('pubsub'))
+      server.stubs(:pubsub_pool).returns([ stub_everything('pubsub') ])
 
       open_connection server: server
     end

test/connection/string_identifier_test.rb

@@ -25,7 +25,7 @@ class ActionCable::Connection::StringIdentifierTest < ActionCable::TestCase
   protected
     def open_connection_with_stubbed_pubsub
       @server = TestServer.new
-      @server.stubs(:pubsub).returns(stub_everything('pubsub'))
+      @server.stubs(:pubsub_pool).returns([ stub_everything('pubsub') ])
 
       open_connection
     end

test/stubs/test_connection.rb

@@ -2,6 +2,7 @@ require 'stubs/user'
 
 class TestConnection
   attr_reader :identifiers, :logger, :current_user, :transmissions
+  attr_accessor :pubsub
 
   def initialize(user = User.new("lifo"))
     @identifiers = [ :current_user ]

test/stubs/test_server.rb

@@ -4,10 +4,12 @@ class TestServer
   include ActionCable::Server::Connections
 
   attr_reader :logger, :config
+  attr_accessor :pubsub_pool
 
   def initialize
     @logger = ActiveSupport::TaggedLogging.new ActiveSupport::Logger.new(StringIO.new)
     @config = OpenStruct.new(log_tags: [])
+    @pubsub_pool = []
   end
 
   def send_async