module ActiveJob::TestHelper

def assert_enqueued_with(args = {}, &_block)

end
end
MyJob.perform_later(1,2,3)
assert_enqueued_with(job: MyJob, args: [1,2,3], queue: 'low') do
def assert_enqueued_job

Asserts that the job passed in the block has been enqueued with the given arguments. 
def assert_enqueued_with(args = {}, &_block)
  original_enqueued_jobs = enqueued_jobs.dup
  clear_enqueued_jobs
  args.assert_valid_keys(:job, :args, :at, :queue)
  yield
  matching_job = enqueued_jobs.any? do |job|
    args.all? { |key, value| value == job[key] }
  end
  assert matching_job, "No enqueued job found with #{args}"
ensure
  queue_adapter.enqueued_jobs = original_enqueued_jobs + enqueued_jobs
end