aboutsummaryrefslogtreecommitdiffstats
path: root/activejob/lib/active_job/test_helper.rb
blob: 5b1af7da22f26eb9629e2539ab71a225820f234c (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
# frozen_string_literal: true

require "active_support/core_ext/class/subclasses"

module ActiveJob
  # Provides helper methods for testing Active Job
  module TestHelper
    delegate :enqueued_jobs, :enqueued_jobs=,
      :performed_jobs, :performed_jobs=,
      to: :queue_adapter

    module TestQueueAdapter
      extend ActiveSupport::Concern

      included do
        class_attribute :_test_adapter, instance_accessor: false, instance_predicate: false
      end

      module ClassMethods
        def queue_adapter
          self._test_adapter.nil? ? super : self._test_adapter
        end

        def disable_test_adapter
          self._test_adapter = nil
        end

        def enable_test_adapter(test_adapter)
          self._test_adapter = test_adapter
        end
      end
    end

    ActiveJob::Base.include(TestQueueAdapter)

    def before_setup # :nodoc:
      test_adapter = queue_adapter_for_test

      queue_adapter_changed_jobs.each do |klass|
        klass.enable_test_adapter(test_adapter)
      end

      clear_enqueued_jobs
      clear_performed_jobs
      super
    end

    def after_teardown # :nodoc:
      super

      queue_adapter_changed_jobs.each { |klass| klass.disable_test_adapter }
    end

    # Specifies the queue adapter to use with all Active Job test helpers.
    #
    # Returns an instance of the queue adapter and defaults to
    # <tt>ActiveJob::QueueAdapters::TestAdapter</tt>.
    #
    # Note: The adapter provided by this method must provide some additional
    # methods from those expected of a standard <tt>ActiveJob::QueueAdapter</tt>
    # in order to be used with the active job test helpers. Refer to
    # <tt>ActiveJob::QueueAdapters::TestAdapter</tt>.
    def queue_adapter_for_test
      ActiveJob::QueueAdapters::TestAdapter.new
    end

    # Asserts that the number of enqueued jobs matches the given number.
    #
    #   def test_jobs
    #     assert_enqueued_jobs 0
    #     HelloJob.perform_later('david')
    #     assert_enqueued_jobs 1
    #     HelloJob.perform_later('abdelkader')
    #     assert_enqueued_jobs 2
    #   end
    #
    # If a block is passed, asserts that the block will cause the specified number of
    # jobs to be enqueued.
    #
    #   def test_jobs_again
    #     assert_enqueued_jobs 1 do
    #       HelloJob.perform_later('cristian')
    #     end
    #
    #     assert_enqueued_jobs 2 do
    #       HelloJob.perform_later('aaron')
    #       HelloJob.perform_later('rafael')
    #     end
    #   end
    #
    # Asserts the number of times a specific job was enqueued by passing +:only+ option.
    #
    #   def test_logging_job
    #     assert_enqueued_jobs 1, only: LoggingJob do
    #       LoggingJob.perform_later
    #       HelloJob.perform_later('jeremy')
    #     end
    #   end
    #
    # Asserts the number of times a job except specific class was enqueued by passing +:except+ option.
    #
    #   def test_logging_job
    #     assert_enqueued_jobs 1, except: HelloJob do
    #       LoggingJob.perform_later
    #       HelloJob.perform_later('jeremy')
    #     end
    #   end
    #
    # +:only+ and +:except+ options accepts Class, Array of Class or Proc. When passed a Proc,
    # a hash containing the job's class and it's argument are passed as argument.
    #
    # Asserts the number of times a job is enqueued to a specific queue by passing +:queue+ option.
    #
    #   def test_logging_job
    #     assert_enqueued_jobs 2, queue: 'default' do
    #       LoggingJob.perform_later
    #       HelloJob.perform_later('elfassy')
    #     end
    #   end
    def assert_enqueued_jobs(number, only: nil, except: nil, queue: nil)
      if block_given?
        original_count = enqueued_jobs_with(only: only, except: except, queue: queue)

        yield

        new_count = enqueued_jobs_with(only: only, except: except, queue: queue)

        actual_count = new_count - original_count
      else
        actual_count = enqueued_jobs_with(only: only, except: except, queue: queue)
      end

      assert_equal number, actual_count, "#{number} jobs expected, but #{actual_count} were enqueued"
    end

    # Asserts that no jobs have been enqueued.
    #
    #   def test_jobs
    #     assert_no_enqueued_jobs
    #     HelloJob.perform_later('jeremy')
    #     assert_enqueued_jobs 1
    #   end
    #
    # If a block is passed, asserts that the block will not cause any job to be enqueued.
    #
    #   def test_jobs_again
    #     assert_no_enqueued_jobs do
    #       # No job should be enqueued from this block
    #     end
    #   end
    #
    # Asserts that no jobs of a specific kind are enqueued by passing +:only+ option.
    #
    #   def test_no_logging
    #     assert_no_enqueued_jobs only: LoggingJob do
    #       HelloJob.perform_later('jeremy')
    #     end
    #   end
    #
    # Asserts that no jobs except specific class are enqueued by passing +:except+ option.
    #
    #   def test_no_logging
    #     assert_no_enqueued_jobs except: HelloJob do
    #       HelloJob.perform_later('jeremy')
    #     end
    #   end
    #
    # +:only+ and +:except+ options accepts Class, Array of Class or Proc. When passed a Proc,
    # a hash containing the job's class and it's argument are passed as argument.
    #
    # Asserts that no jobs are enqueued to a specific queue by passing +:queue+ option
    #
    #   def test_no_logging
    #     assert_no_enqueued_jobs queue: 'default' do
    #       LoggingJob.set(queue: :some_queue).perform_later
    #     end
    #   end
    #
    # Note: This assertion is simply a shortcut for:
    #
    #   assert_enqueued_jobs 0, &block
    def assert_no_enqueued_jobs(only: nil, except: nil, queue: nil, &block)
      assert_enqueued_jobs 0, only: only, except: except, queue: queue, &block
    end

    # Asserts that the number of performed jobs matches the given number.
    # If no block is passed, <tt>perform_enqueued_jobs</tt>
    # must be called around or after the job call.
    #
    #   def test_jobs
    #     assert_performed_jobs 0
    #
    #     perform_enqueued_jobs do
    #       HelloJob.perform_later('xavier')
    #     end
    #     assert_performed_jobs 1
    #
    #     HelloJob.perform_later('yves')
    #
    #     perform_enqueued_jobs
    #
    #     assert_performed_jobs 2
    #   end
    #
    # If a block is passed, asserts that the block will cause the specified number of
    # jobs to be performed.
    #
    #   def test_jobs_again
    #     assert_performed_jobs 1 do
    #       HelloJob.perform_later('robin')
    #     end
    #
    #     assert_performed_jobs 2 do
    #       HelloJob.perform_later('carlos')
    #       HelloJob.perform_later('sean')
    #     end
    #   end
    #
    # This method also supports filtering. If the +:only+ option is specified,
    # then only the listed job(s) will be performed.
    #
    #     def test_hello_job
    #       assert_performed_jobs 1, only: HelloJob do
    #         HelloJob.perform_later('jeremy')
    #         LoggingJob.perform_later
    #       end
    #     end
    #
    # Also if the +:except+ option is specified,
    # then the job(s) except specific class will be performed.
    #
    #     def test_hello_job
    #       assert_performed_jobs 1, except: LoggingJob do
    #         HelloJob.perform_later('jeremy')
    #         LoggingJob.perform_later
    #       end
    #     end
    #
    # An array may also be specified, to support testing multiple jobs.
    #
    #     def test_hello_and_logging_jobs
    #       assert_nothing_raised do
    #         assert_performed_jobs 2, only: [HelloJob, LoggingJob] do
    #           HelloJob.perform_later('jeremy')
    #           LoggingJob.perform_later('stewie')
    #           RescueJob.perform_later('david')
    #         end
    #       end
    #     end
    #
    # A proc may also be specified. When passed a Proc, the job's instance will be passed as argument.
    #
    #     def test_hello_and_logging_jobs
    #       assert_nothing_raised do
    #         assert_performed_jobs(1, only: ->(job) { job.is_a?(HelloJob) }) do
    #           HelloJob.perform_later('jeremy')
    #           LoggingJob.perform_later('stewie')
    #           RescueJob.perform_later('david')
    #         end
    #       end
    #     end
    #
    # If the +:queue+ option is specified,
    # then only the job(s) enqueued to a specific queue will be performed.
    #
    #     def test_assert_performed_jobs_with_queue_option
    #       assert_performed_jobs 1, queue: :some_queue do
    #         HelloJob.set(queue: :some_queue).perform_later("jeremy")
    #         HelloJob.set(queue: :other_queue).perform_later("bogdan")
    #       end
    #     end
    def assert_performed_jobs(number, only: nil, except: nil, queue: nil, &block)
      if block_given?
        original_count = performed_jobs.size

        perform_enqueued_jobs(only: only, except: except, queue: queue, &block)

        new_count = performed_jobs.size

        performed_jobs_size = new_count - original_count
      else
        performed_jobs_size = performed_jobs_with(only: only, except: except, queue: queue)
      end

      assert_equal number, performed_jobs_size, "#{number} jobs expected, but #{performed_jobs_size} were performed"
    end

    # Asserts that no jobs have been performed.
    #
    #   def test_jobs
    #     assert_no_performed_jobs
    #
    #     perform_enqueued_jobs do
    #       HelloJob.perform_later('matthew')
    #       assert_performed_jobs 1
    #     end
    #   end
    #
    # If a block is passed, asserts that the block will not cause any job to be performed.
    #
    #   def test_jobs_again
    #     assert_no_performed_jobs do
    #       # No job should be performed from this block
    #     end
    #   end
    #
    # The block form supports filtering. If the +:only+ option is specified,
    # then only the listed job(s) will not be performed.
    #
    #   def test_no_logging
    #     assert_no_performed_jobs only: LoggingJob do
    #       HelloJob.perform_later('jeremy')
    #     end
    #   end
    #
    # Also if the +:except+ option is specified,
    # then the job(s) except specific class will not be performed.
    #
    #   def test_no_logging
    #     assert_no_performed_jobs except: HelloJob do
    #       HelloJob.perform_later('jeremy')
    #     end
    #   end
    #
    # +:only+ and +:except+ options accepts Class, Array of Class or Proc. When passed a Proc,
    # an instance of the job will be passed as argument.
    #
    # If the +:queue+ option is specified,
    # then only the job(s) enqueued to a specific queue will not be performed.
    #
    #   def test_assert_no_performed_jobs_with_queue_option
    #     assert_no_performed_jobs queue: :some_queue do
    #       HelloJob.set(queue: :other_queue).perform_later("jeremy")
    #     end
    #   end
    #
    # Note: This assertion is simply a shortcut for:
    #
    #   assert_performed_jobs 0, &block
    def assert_no_performed_jobs(only: nil, except: nil, queue: nil, &block)
      assert_performed_jobs 0, only: only, except: except, queue: queue, &block
    end

    # Asserts that the job has been enqueued with the given arguments.
    #
    #   def test_assert_enqueued_with
    #     MyJob.perform_later(1,2,3)
    #     assert_enqueued_with(job: MyJob, args: [1,2,3], queue: 'low')
    #
    #     MyJob.set(wait_until: Date.tomorrow.noon).perform_later
    #     assert_enqueued_with(job: MyJob, at: Date.tomorrow.noon)
    #   end
    #
    #
    # The +args+ argument also accepts a proc which will get passed the actual
    # job's arguments. Your proc needs to return a boolean value determining if
    # the job's arguments matches your expectation. This is useful to check only
    # for a subset of arguments.
    #
    #   def test_assert_enqueued_with
    #     expected_args = ->(job_args) do
    #       assert job_args.first.key?(:foo)
    #     end
    #
    #     MyJob.perform_later(foo: 'bar', other_arg: 'No need to check in the test')
    #     assert_enqueued_with(job: MyJob, args: expected_args, queue: 'low')
    #   end
    #
    #
    # If a block is passed, asserts that the block will cause the job to be
    # enqueued with the given arguments.
    #
    #   def test_assert_enqueued_with
    #     assert_enqueued_with(job: MyJob, args: [1,2,3], queue: 'low') do
    #       MyJob.perform_later(1,2,3)
    #     end
    #
    #     assert_enqueued_with(job: MyJob, at: Date.tomorrow.noon) do
    #       MyJob.set(wait_until: Date.tomorrow.noon).perform_later
    #     end
    #   end
    def assert_enqueued_with(job: nil, args: nil, at: nil, queue: nil)
      expected = { job: job, args: args, at: at, queue: queue }.compact
      expected_args = prepare_args_for_assertion(expected)

      if block_given?
        original_enqueued_jobs_count = enqueued_jobs.count

        yield

        jobs = enqueued_jobs.drop(original_enqueued_jobs_count)
      else
        jobs = enqueued_jobs
      end

      matching_job = jobs.find do |enqueued_job|
        deserialized_job = deserialize_args_for_assertion(enqueued_job)

        expected_args.all? do |key, value|
          if value.respond_to?(:call)
            value.call(deserialized_job[key])
          else
            value == deserialized_job[key]
          end
        end
      end

      assert matching_job, "No enqueued job found with #{expected}"
      instantiate_job(matching_job)
    end

    # Asserts that the job has been performed with the given arguments.
    #
    #   def test_assert_performed_with
    #     MyJob.perform_later(1,2,3)
    #
    #     perform_enqueued_jobs
    #
    #     assert_performed_with(job: MyJob, args: [1,2,3], queue: 'high')
    #
    #     MyJob.set(wait_until: Date.tomorrow.noon).perform_later
    #
    #     perform_enqueued_jobs
    #
    #     assert_performed_with(job: MyJob, at: Date.tomorrow.noon)
    #   end
    #
    # The +args+ argument also accepts a proc which will get passed the actual
    # job's arguments. Your proc needs to return a boolean value determining if
    # the job's arguments matches your expectation. This is useful to check only
    # for a subset of arguments.
    #
    #   def test_assert_performed_with
    #     expected_args = ->(job_args) do
    #       assert job_args.first.key?(:foo)
    #     end
    #     MyJob.perform_later(foo: 'bar', other_arg: 'No need to check in the test')
    #
    #     perform_enqueued_jobs
    #
    #     assert_performed_with(job: MyJob, args: expected_args, queue: 'high')
    #   end
    #
    # If a block is passed, that block performs all of the jobs that were
    # enqueued throughout the duration of the block and asserts that
    # the job has been performed with the given arguments in the block.
    #
    #   def test_assert_performed_with
    #     assert_performed_with(job: MyJob, args: [1,2,3], queue: 'high') do
    #       MyJob.perform_later(1,2,3)
    #     end
    #
    #     assert_performed_with(job: MyJob, at: Date.tomorrow.noon) do
    #       MyJob.set(wait_until: Date.tomorrow.noon).perform_later
    #     end
    #   end
    def assert_performed_with(job: nil, args: nil, at: nil, queue: nil, &block)
      expected = { job: job, args: args, at: at, queue: queue }.compact
      expected_args = prepare_args_for_assertion(expected)

      if block_given?
        original_performed_jobs_count = performed_jobs.count

        perform_enqueued_jobs(&block)

        jobs = performed_jobs.drop(original_performed_jobs_count)
      else
        jobs = performed_jobs
      end

      matching_job = jobs.find do |enqueued_job|
        deserialized_job = deserialize_args_for_assertion(enqueued_job)

        expected_args.all? do |key, value|
          if value.respond_to?(:call)
            value.call(deserialized_job[key])
          else
            value == deserialized_job[key]
          end
        end
      end

      assert matching_job, "No performed job found with #{expected}"
      instantiate_job(matching_job)
    end

    # Performs all enqueued jobs. If a block is given, performs all of the jobs
    # that were enqueued throughout the duration of the block. If a block is
    # not given, performs all of the enqueued jobs up to this point in the test.
    #
    #   def test_perform_enqueued_jobs
    #     perform_enqueued_jobs do
    #       MyJob.perform_later(1, 2, 3)
    #     end
    #     assert_performed_jobs 1
    #   end
    #
    #   def test_perform_enqueued_jobs_without_block
    #     MyJob.perform_later(1, 2, 3)
    #
    #     perform_enqueued_jobs
    #
    #     assert_performed_jobs 1
    #   end
    #
    # This method also supports filtering. If the +:only+ option is specified,
    # then only the listed job(s) will be performed.
    #
    #   def test_perform_enqueued_jobs_with_only
    #     perform_enqueued_jobs(only: MyJob) do
    #       MyJob.perform_later(1, 2, 3) # will be performed
    #       HelloJob.perform_later(1, 2, 3) # will not be performed
    #     end
    #     assert_performed_jobs 1
    #   end
    #
    # Also if the +:except+ option is specified,
    # then the job(s) except specific class will be performed.
    #
    #   def test_perform_enqueued_jobs_with_except
    #     perform_enqueued_jobs(except: HelloJob) do
    #       MyJob.perform_later(1, 2, 3) # will be performed
    #       HelloJob.perform_later(1, 2, 3) # will not be performed
    #     end
    #     assert_performed_jobs 1
    #   end
    #
    # +:only+ and +:except+ options accepts Class, Array of Class or Proc. When passed a Proc,
    # an instance of the job will be passed as argument.
    #
    # If the +:queue+ option is specified,
    # then only the job(s) enqueued to a specific queue will be performed.
    #
    #   def test_perform_enqueued_jobs_with_queue
    #     perform_enqueued_jobs queue: :some_queue do
    #       MyJob.set(queue: :some_queue).perform_later(1, 2, 3) # will be performed
    #       HelloJob.set(queue: :other_queue).perform_later(1, 2, 3) # will not be performed
    #     end
    #     assert_performed_jobs 1
    #   end
    #
    def perform_enqueued_jobs(only: nil, except: nil, queue: nil)
      return flush_enqueued_jobs(only: only, except: except, queue: queue) unless block_given?

      validate_option(only: only, except: except)

      old_perform_enqueued_jobs = queue_adapter.perform_enqueued_jobs
      old_perform_enqueued_at_jobs = queue_adapter.perform_enqueued_at_jobs
      old_filter = queue_adapter.filter
      old_reject = queue_adapter.reject
      old_queue = queue_adapter.queue

      begin
        queue_adapter.perform_enqueued_jobs = true
        queue_adapter.perform_enqueued_at_jobs = true
        queue_adapter.filter = only
        queue_adapter.reject = except
        queue_adapter.queue = queue

        yield
      ensure
        queue_adapter.perform_enqueued_jobs = old_perform_enqueued_jobs
        queue_adapter.perform_enqueued_at_jobs = old_perform_enqueued_at_jobs
        queue_adapter.filter = old_filter
        queue_adapter.reject = old_reject
        queue_adapter.queue = old_queue
      end
    end

    # Accesses the queue_adapter set by ActiveJob::Base.
    #
    #   def test_assert_job_has_custom_queue_adapter_set
    #     assert_instance_of CustomQueueAdapter, HelloJob.queue_adapter
    #   end
    def queue_adapter
      ActiveJob::Base.queue_adapter
    end

    private
      def clear_enqueued_jobs
        enqueued_jobs.clear
      end

      def clear_performed_jobs
        performed_jobs.clear
      end

      def jobs_with(jobs, only: nil, except: nil, queue: nil)
        validate_option(only: only, except: except)

        jobs.count do |job|
          job_class = job.fetch(:job)

          if only
            next false unless filter_as_proc(only).call(job)
          elsif except
            next false if filter_as_proc(except).call(job)
          end

          if queue
            next false unless queue.to_s == job.fetch(:queue, job_class.queue_name)
          end

          yield job if block_given?

          true
        end
      end

      def filter_as_proc(filter)
        return filter if filter.is_a?(Proc)

        ->(job) { Array(filter).include?(job.fetch(:job)) }
      end

      def enqueued_jobs_with(only: nil, except: nil, queue: nil, &block)
        jobs_with(enqueued_jobs, only: only, except: except, queue: queue, &block)
      end

      def performed_jobs_with(only: nil, except: nil, queue: nil, &block)
        jobs_with(performed_jobs, only: only, except: except, queue: queue, &block)
      end

      def flush_enqueued_jobs(only: nil, except: nil, queue: nil)
        enqueued_jobs_with(only: only, except: except, queue: queue) do |payload|
          instantiate_job(payload).perform_now
          queue_adapter.performed_jobs << payload
        end
      end

      def prepare_args_for_assertion(args)
        args.dup.tap do |arguments|
          arguments[:at] = round_time_arguments(arguments[:at]) if arguments[:at]
          arguments[:args] = round_time_arguments(arguments[:args]) if arguments[:args]
        end
      end

      def round_time_arguments(argument)
        case argument
        when Time, ActiveSupport::TimeWithZone, DateTime
          argument.change(usec: 0)
        when Hash
          argument.transform_values { |value| round_time_arguments(value) }
        when Array
          argument.map { |element| round_time_arguments(element) }
        else
          argument
        end
      end

      def deserialize_args_for_assertion(job)
        job.dup.tap do |new_job|
          new_job[:at] = round_time_arguments(Time.at(new_job[:at])) if new_job[:at]
          new_job[:args] = ActiveJob::Arguments.deserialize(new_job[:args]) if new_job[:args]
        end
      end

      def instantiate_job(payload)
        args = ActiveJob::Arguments.deserialize(payload[:args])
        job = payload[:job].new(*args)
        job.scheduled_at = Time.at(payload[:at]) if payload.key?(:at)
        job.queue_name = payload[:queue]
        job
      end

      def queue_adapter_changed_jobs
        (ActiveJob::Base.descendants << ActiveJob::Base).select do |klass|
          # only override explicitly set adapters, a quirk of `class_attribute`
          klass.singleton_class.public_instance_methods(false).include?(:_queue_adapter)
        end
      end

      def validate_option(only: nil, except: nil)
        raise ArgumentError, "Cannot specify both `:only` and `:except` options." if only && except
      end
  end
end