rails--rails/activejob/lib/active_job/queue_adapters/test_adapter.rb

module ActiveJob
  module QueueAdapters
    # == Test adapter for Active Job
    #
    # The test adapter should be used only in testing. Along with
    # <tt>ActiveJob::TestCase</tt> and <tt>ActiveJob::TestHelper</tt>
    # it makes a great tool to test your Rails application.
    #
    # To use the test adapter set queue_adapter config to +:test+.
    #
    #   Rails.application.config.active_job.queue_adapter = :test
    class TestAdapter
      class << self
        attr_accessor(:perform_enqueued_jobs, :perform_enqueued_at_jobs, :filter)
        attr_writer(:enqueued_jobs, :performed_jobs)

        # Provides a store of all the enqueued jobs with the TestAdapter so you can check them.
        def enqueued_jobs
          @enqueued_jobs ||= []
        end

        # Provides a store of all the performed jobs with the TestAdapter so you can check them.
        def performed_jobs
          @performed_jobs ||= []
        end

        def enqueue(job) #:nodoc:
          return if filtered?(job)

          job_data = job_to_hash(job)
          enqueue_or_perform(perform_enqueued_jobs, job, job_data)
        end

        def enqueue_at(job, timestamp) #:nodoc:
          return if filtered?(job)

          job_data = job_to_hash(job, at: timestamp)
          enqueue_or_perform(perform_enqueued_at_jobs, job, job_data)
        end

        private

        def job_to_hash(job, extras = {})
          { job: job.class, args: job.serialize.fetch('arguments'), queue: job.queue_name }.merge!(extras)
        end

        def enqueue_or_perform(perform, job, job_data)
          if perform
            performed_jobs << job_data
            Base.execute job.serialize
          else
            enqueued_jobs << job_data
          end
        end

        def filtered?(job)
          filter && !Array(filter).include?(job.class)
        end
      end
    end
  end
end