rails--rails/actioncable/test/connection/client_socket_test.rb

require "test_helper"
require "stubs/test_server"

class ActionCable::Connection::ClientSocketTest < ActionCable::TestCase
  class Connection < ActionCable::Connection::Base
    attr_reader :connected, :websocket, :errors

    def initialize(*)
      super
      @errors = []
    end

    def connect
      @connected = true
    end

    def disconnect
      @connected = false
    end

    def send_async(method, *args)
      send method, *args
    end

    def on_error(message)
      @errors << message
    end
  end

  setup do
    @server = TestServer.new
    @server.config.allowed_request_origins = %w( http://rubyonrails.com )
  end

  test "delegate socket errors to on_error handler" do
    run_in_eventmachine do
      connection = open_connection

      # Internal hax = :(
      client = connection.websocket.send(:websocket)
      client.instance_variable_get("@stream").expects(:write).raises("foo")
      client.expects(:client_gone).never

      client.write("boo")
      assert_equal %w[ foo ], connection.errors
    end
  end

  test "closes hijacked i/o socket at shutdown" do
    run_in_eventmachine do
      connection = open_connection

      client = connection.websocket.send(:websocket)
      event = Concurrent::Event.new
      client.instance_variable_get("@stream")
        .instance_variable_get("@rack_hijack_io")
        .define_singleton_method(:close) { event.set }
      connection.close
      event.wait
    end
  end

  private
    def open_connection
      env = Rack::MockRequest.env_for "/test",
        "HTTP_CONNECTION" => "upgrade", "HTTP_UPGRADE" => "websocket",
        "HTTP_HOST" => "localhost", "HTTP_ORIGIN" => "http://rubyonrails.com"
      io = \
        begin
          Socket.pair(Socket::AF_UNIX, Socket::SOCK_STREAM, 0).first
        rescue
          StringIO.new
        end
      env["rack.hijack"] = -> { env["rack.hijack_io"] = io }

      Connection.new(@server, env).tap do |connection|
        connection.process
        connection.send :handle_open
        assert connection.connected
      end
    end
end