instance method enqueued_jobs_size

# File activejob/lib/active_job/test_helper.rb, line 409
      def enqueued_jobs_size(only: nil, except: nil, queue: nil)
        validate_option(only: only, except: except)
        enqueued_jobs.count do |job|
          job_class = job.fetch(:job)
          if only
            next false unless Array(only).include?(job_class)
          elsif except
            next false if Array(except).include?(job_class)
          end
          if queue
            next false unless queue.to_s == job.fetch(:queue, job_class.queue_name)
          end
          true
        end
      end