rails--rails/activesupport/test/queueing/synchronous_queue_test.rb

require 'abstract_unit'
require 'active_support/queueing'

class SynchronousQueueTest < ActiveSupport::TestCase
  class Job
    attr_reader :ran
    def run; @ran = true end
  end

  class ExceptionRaisingJob
    def run; raise end
  end

  def setup
    @queue = ActiveSupport::SynchronousQueue.new
  end

  def test_runs_jobs_immediately
    job = Job.new
    @queue.push job
    assert job.ran

    assert_raises RuntimeError do
      @queue.push ExceptionRaisingJob.new
    end
  end
end