aboutsummaryrefslogtreecommitdiffstats
path: root/actionmailer/test/base_test.rb
blob: 170923673b37f05f145413d92ada8de0906399c4 (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
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
# encoding: utf-8
require 'abstract_unit'
require 'set'

require 'action_dispatch'
require 'active_support/queueing'
require 'active_support/time'

require 'mailers/base_mailer'
require 'mailers/proc_mailer'
require 'mailers/asset_mailer'
require 'mailers/async_mailer'

class BaseTest < ActiveSupport::TestCase
  def teardown
    ActionMailer::Base.asset_host = nil
    ActionMailer::Base.assets_dir = nil
  end

  test "method call to mail does not raise error" do
    assert_nothing_raised { BaseMailer.welcome }
  end

  # Basic mail usage without block
  test "mail() should set the headers of the mail message" do
    email = BaseMailer.welcome
    assert_equal(['system@test.lindsaar.net'],    email.to)
    assert_equal(['jose@test.plataformatec.com'], email.from)
    assert_equal('The first email on new API!',   email.subject)
  end

  test "mail() with from overwrites the class level default" do
    email = BaseMailer.welcome(from: 'someone@example.com',
                               to:   'another@example.org')
    assert_equal(['someone@example.com'], email.from)
    assert_equal(['another@example.org'], email.to)
  end

  test "mail() with bcc, cc, content_type, charset, mime_version, reply_to and date" do
    time  = Time.now.beginning_of_day.to_datetime
    email = BaseMailer.welcome(bcc: 'bcc@test.lindsaar.net',
                               cc: 'cc@test.lindsaar.net',
                               content_type: 'multipart/mixed',
                               charset: 'iso-8559-1',
                               mime_version: '2.0',
                               reply_to: 'reply-to@test.lindsaar.net',
                               date: time)
    assert_equal(['bcc@test.lindsaar.net'],             email.bcc)
    assert_equal(['cc@test.lindsaar.net'],              email.cc)
    assert_equal('multipart/mixed; charset=iso-8559-1', email.content_type)
    assert_equal('iso-8559-1',                          email.charset)
    assert_equal('2.0',                                 email.mime_version)
    assert_equal(['reply-to@test.lindsaar.net'],        email.reply_to)
    assert_equal(time,                                  email.date)
  end

  test "mail() renders the template using the method being processed" do
    email = BaseMailer.welcome
    assert_equal("Welcome", email.body.encoded)
  end

  test "can pass in :body to the mail method hash" do
    email = BaseMailer.welcome(body: "Hello there")
    assert_equal("text/plain", email.mime_type)
    assert_equal("Hello there", email.body.encoded)
  end

  test "should set template content type if mail has only one part" do
    mail = BaseMailer.html_only
    assert_equal('text/html', mail.mime_type)
    mail = BaseMailer.plain_text_only
    assert_equal('text/plain', mail.mime_type)
  end

  # Custom headers
  test "custom headers" do
    email = BaseMailer.welcome
    assert_equal("Not SPAM", email['X-SPAM'].decoded)
  end

  test "can pass random headers in as a hash to mail" do
    hash = {'X-Special-Domain-Specific-Header' => "SecretValue",
            'In-Reply-To' => '1234@mikel.me.com' }
    mail = BaseMailer.welcome(hash)
    assert_equal('SecretValue', mail['X-Special-Domain-Specific-Header'].decoded)
    assert_equal('1234@mikel.me.com', mail['In-Reply-To'].decoded)
  end

  test "can pass random headers in as a hash to headers" do
    hash = {'X-Special-Domain-Specific-Header' => "SecretValue",
            'In-Reply-To' => '1234@mikel.me.com' }
    mail = BaseMailer.welcome_with_headers(hash)
    assert_equal('SecretValue', mail['X-Special-Domain-Specific-Header'].decoded)
    assert_equal('1234@mikel.me.com', mail['In-Reply-To'].decoded)
  end

  # Attachments
  test "attachment with content" do
    email = BaseMailer.attachment_with_content
    assert_equal(1, email.attachments.length)
    assert_equal('invoice.pdf', email.attachments[0].filename)
    assert_equal('This is test File content', email.attachments['invoice.pdf'].decoded)
  end

  test "attachment gets content type from filename" do
    email = BaseMailer.attachment_with_content
    assert_equal('invoice.pdf', email.attachments[0].filename)
  end

  test "attachment with hash" do
    email = BaseMailer.attachment_with_hash
    assert_equal(1, email.attachments.length)
    assert_equal('invoice.jpg', email.attachments[0].filename)
    expected = "\312\213\254\232)b"
    expected.force_encoding(Encoding::BINARY)
    assert_equal expected, email.attachments['invoice.jpg'].decoded
  end

  test "attachment with hash using default mail encoding" do
    email = BaseMailer.attachment_with_hash_default_encoding
    assert_equal(1, email.attachments.length)
    assert_equal('invoice.jpg', email.attachments[0].filename)
    expected = "\312\213\254\232)b"
    expected.force_encoding(Encoding::BINARY)
    assert_equal expected, email.attachments['invoice.jpg'].decoded
  end

  test "sets mime type to multipart/mixed when attachment is included" do
    email = BaseMailer.attachment_with_content
    assert_equal(1, email.attachments.length)
    assert_equal("multipart/mixed", email.mime_type)
  end

  test "adds the rendered template as part" do
    email = BaseMailer.attachment_with_content
    assert_equal(2, email.parts.length)
    assert_equal("multipart/mixed", email.mime_type)
    assert_equal("text/html", email.parts[0].mime_type)
    assert_equal("Attachment with content", email.parts[0].body.encoded)
    assert_equal("application/pdf", email.parts[1].mime_type)
    assert_equal("VGhpcyBpcyB0ZXN0IEZpbGUgY29udGVudA==\r\n", email.parts[1].body.encoded)
  end

  test "adds the given :body as part" do
    email = BaseMailer.attachment_with_content(body: "I'm the eggman")
    assert_equal(2, email.parts.length)
    assert_equal("multipart/mixed", email.mime_type)
    assert_equal("text/plain", email.parts[0].mime_type)
    assert_equal("I'm the eggman", email.parts[0].body.encoded)
    assert_equal("application/pdf", email.parts[1].mime_type)
    assert_equal("VGhpcyBpcyB0ZXN0IEZpbGUgY29udGVudA==\r\n", email.parts[1].body.encoded)
  end

  test "can embed an inline attachment" do
    email = BaseMailer.inline_attachment
    # Need to call #encoded to force the JIT sort on parts
    email.encoded
    assert_equal(2, email.parts.length)
    assert_equal("multipart/related", email.mime_type)
    assert_equal("multipart/alternative", email.parts[0].mime_type)
    assert_equal("text/plain", email.parts[0].parts[0].mime_type)
    assert_equal("text/html",  email.parts[0].parts[1].mime_type)
    assert_equal("logo.png", email.parts[1].filename)
  end

  # Defaults values
  test "uses default charset from class" do
    with_default BaseMailer, charset: "US-ASCII" do
      email = BaseMailer.welcome
      assert_equal("US-ASCII", email.charset)

      email = BaseMailer.welcome(charset: "iso-8559-1")
      assert_equal("iso-8559-1", email.charset)
    end
  end

  test "uses default content type from class" do
    with_default BaseMailer, content_type: "text/html" do
      email = BaseMailer.welcome
      assert_equal("text/html", email.mime_type)

      email = BaseMailer.welcome(content_type: "text/plain")
      assert_equal("text/plain", email.mime_type)
    end
  end

  test "uses default mime version from class" do
    with_default BaseMailer, mime_version: "2.0" do
      email = BaseMailer.welcome
      assert_equal("2.0", email.mime_version)

      email = BaseMailer.welcome(mime_version: "1.0")
      assert_equal("1.0", email.mime_version)
    end
  end

  test "uses random default headers from class" do
    with_default BaseMailer, "X-Custom" => "Custom" do
      email = BaseMailer.welcome
      assert_equal("Custom", email["X-Custom"].decoded)
    end
  end

  test "subject gets default from I18n" do
    BaseMailer.default subject: nil
    email = BaseMailer.welcome(subject: nil)
    assert_equal "Welcome", email.subject

    I18n.backend.store_translations('en', base_mailer: {welcome: {subject: "New Subject!"}})
    email = BaseMailer.welcome(subject: nil)
    assert_equal "New Subject!", email.subject
  end

  test "translations are scoped properly" do
    I18n.backend.store_translations('en', base_mailer: {email_with_translations: {greet_user: "Hello %{name}!"}})
    email = BaseMailer.email_with_translations
    assert_equal 'Hello lifo!', email.body.encoded
  end

  # Implicit multipart
  test "implicit multipart" do
    email = BaseMailer.implicit_multipart
    assert_equal(2, email.parts.size)
    assert_equal("multipart/alternative", email.mime_type)
    assert_equal("text/plain", email.parts[0].mime_type)
    assert_equal("TEXT Implicit Multipart", email.parts[0].body.encoded)
    assert_equal("text/html", email.parts[1].mime_type)
    assert_equal("HTML Implicit Multipart", email.parts[1].body.encoded)
  end

  test "implicit multipart with sort order" do
    order = ["text/html", "text/plain"]
    with_default BaseMailer, parts_order: order do
      email = BaseMailer.implicit_multipart
      assert_equal("text/html",  email.parts[0].mime_type)
      assert_equal("text/plain", email.parts[1].mime_type)

      email = BaseMailer.implicit_multipart(parts_order: order.reverse)
      assert_equal("text/plain", email.parts[0].mime_type)
      assert_equal("text/html",  email.parts[1].mime_type)
    end
  end

  test "implicit multipart with attachments creates nested parts" do
    email = BaseMailer.implicit_multipart(attachments: true)
    assert_equal("application/pdf", email.parts[0].mime_type)
    assert_equal("multipart/alternative", email.parts[1].mime_type)
    assert_equal("text/plain", email.parts[1].parts[0].mime_type)
    assert_equal("TEXT Implicit Multipart", email.parts[1].parts[0].body.encoded)
    assert_equal("text/html", email.parts[1].parts[1].mime_type)
    assert_equal("HTML Implicit Multipart", email.parts[1].parts[1].body.encoded)
  end

  test "implicit multipart with attachments and sort order" do
    order = ["text/html", "text/plain"]
    with_default BaseMailer, parts_order: order do
      email = BaseMailer.implicit_multipart(attachments: true)
      assert_equal("application/pdf", email.parts[0].mime_type)
      assert_equal("multipart/alternative", email.parts[1].mime_type)
      assert_equal("text/plain", email.parts[1].parts[1].mime_type)
      assert_equal("text/html", email.parts[1].parts[0].mime_type)
    end
  end

  test "implicit multipart with default locale" do
    email = BaseMailer.implicit_with_locale
    assert_equal(2, email.parts.size)
    assert_equal("multipart/alternative", email.mime_type)
    assert_equal("text/plain", email.parts[0].mime_type)
    assert_equal("Implicit with locale TEXT", email.parts[0].body.encoded)
    assert_equal("text/html", email.parts[1].mime_type)
    assert_equal("Implicit with locale EN HTML", email.parts[1].body.encoded)
  end

  test "implicit multipart with other locale" do
    swap I18n, locale: :pl do
      email = BaseMailer.implicit_with_locale
      assert_equal(2, email.parts.size)
      assert_equal("multipart/alternative", email.mime_type)
      assert_equal("text/plain", email.parts[0].mime_type)
      assert_equal("Implicit with locale PL TEXT", email.parts[0].body.encoded)
      assert_equal("text/html", email.parts[1].mime_type)
      assert_equal("Implicit with locale HTML", email.parts[1].body.encoded)
    end
  end

  test "implicit multipart with several view paths uses the first one with template" do
    old = BaseMailer.view_paths
    begin
      BaseMailer.view_paths = [File.join(FIXTURE_LOAD_PATH, "another.path")] + old.dup
      email = BaseMailer.welcome
      assert_equal("Welcome from another path", email.body.encoded)
    ensure
      BaseMailer.view_paths = old
    end
  end

  test "implicit multipart with inexistent templates uses the next view path" do
    old = BaseMailer.view_paths
    begin
      BaseMailer.view_paths = [File.join(FIXTURE_LOAD_PATH, "unknown")] + old.dup
      email = BaseMailer.welcome
      assert_equal("Welcome", email.body.encoded)
    ensure
      BaseMailer.view_paths = old
    end
  end

  # Explicit multipart
  test "explicit multipart" do
    email = BaseMailer.explicit_multipart
    assert_equal(2, email.parts.size)
    assert_equal("multipart/alternative", email.mime_type)
    assert_equal("text/plain", email.parts[0].mime_type)
    assert_equal("TEXT Explicit Multipart", email.parts[0].body.encoded)
    assert_equal("text/html", email.parts[1].mime_type)
    assert_equal("HTML Explicit Multipart", email.parts[1].body.encoded)
  end

  test "explicit multipart have a boundary" do
    mail = BaseMailer.explicit_multipart
    assert_not_nil(mail.content_type_parameters[:boundary])
  end

  test "explicit multipart with attachments creates nested parts" do
    email = BaseMailer.explicit_multipart(attachments: true)
    assert_equal("application/pdf", email.parts[0].mime_type)
    assert_equal("multipart/alternative", email.parts[1].mime_type)
    assert_equal("text/plain", email.parts[1].parts[0].mime_type)
    assert_equal("TEXT Explicit Multipart", email.parts[1].parts[0].body.encoded)
    assert_equal("text/html", email.parts[1].parts[1].mime_type)
    assert_equal("HTML Explicit Multipart", email.parts[1].parts[1].body.encoded)
  end

  test "explicit multipart with templates" do
    email = BaseMailer.explicit_multipart_templates
    assert_equal(2, email.parts.size)
    assert_equal("multipart/alternative", email.mime_type)
    assert_equal("text/plain", email.parts[0].mime_type)
    assert_equal("TEXT Explicit Multipart Templates", email.parts[0].body.encoded)
    assert_equal("text/html", email.parts[1].mime_type)
    assert_equal("HTML Explicit Multipart Templates", email.parts[1].body.encoded)
  end

  test "explicit multipart with format.any" do
    email = BaseMailer.explicit_multipart_with_any
    assert_equal(2, email.parts.size)
    assert_equal("multipart/alternative", email.mime_type)
    assert_equal("text/plain", email.parts[0].mime_type)
    assert_equal("Format with any!", email.parts[0].body.encoded)
    assert_equal("text/html", email.parts[1].mime_type)
    assert_equal("Format with any!", email.parts[1].body.encoded)
  end

  test "explicit multipart with format(Hash)" do
    email = BaseMailer.explicit_multipart_with_options(true)
    email.ready_to_send!
    assert_equal(2, email.parts.size)
    assert_equal("multipart/alternative", email.mime_type)
    assert_equal("text/plain", email.parts[0].mime_type)
    assert_equal("base64", email.parts[0].content_transfer_encoding)
    assert_equal("text/html", email.parts[1].mime_type)
    assert_equal("7bit", email.parts[1].content_transfer_encoding)
  end

  test "explicit multipart with one part is rendered as body and options are merged" do
    email = BaseMailer.explicit_multipart_with_options
    assert_equal(0, email.parts.size)
    assert_equal("text/plain", email.mime_type)
    assert_equal("base64", email.content_transfer_encoding)
  end

  test "explicit multipart with one template has the expected format" do
    email = BaseMailer.explicit_multipart_with_one_template
    assert_equal(2, email.parts.size)
    assert_equal("multipart/alternative", email.mime_type)
    assert_equal("text/plain", email.parts[0].mime_type)
    assert_equal("[:text]", email.parts[0].body.encoded)
    assert_equal("text/html", email.parts[1].mime_type)
    assert_equal("[:html]", email.parts[1].body.encoded)
  end

  test "explicit multipart with sort order" do
    order = ["text/html", "text/plain"]
    with_default BaseMailer, parts_order: order do
      email = BaseMailer.explicit_multipart
      assert_equal("text/html",  email.parts[0].mime_type)
      assert_equal("text/plain", email.parts[1].mime_type)

      email = BaseMailer.explicit_multipart(parts_order: order.reverse)
      assert_equal("text/plain", email.parts[0].mime_type)
      assert_equal("text/html",  email.parts[1].mime_type)
    end
  end

  # Class level API with method missing
  test "should respond to action methods" do
    assert_respond_to BaseMailer, :welcome
    assert_respond_to BaseMailer, :implicit_multipart
    assert !BaseMailer.respond_to?(:mail)
    assert !BaseMailer.respond_to?(:headers)
  end

  test "calling just the action should return the generated mail object" do
    BaseMailer.deliveries.clear
    email = BaseMailer.welcome
    assert_equal(0, BaseMailer.deliveries.length)
    assert_equal('The first email on new API!', email.subject)
  end

  test "calling deliver on the action should deliver the mail object" do
    BaseMailer.deliveries.clear
    BaseMailer.expects(:deliver_mail).once
    mail = BaseMailer.welcome.deliver
    assert_equal 'The first email on new API!', mail.subject
  end

  test "calling deliver on the action should increment the deliveries collection if using the test mailer" do
    BaseMailer.delivery_method = :test
    BaseMailer.deliveries.clear
    BaseMailer.welcome.deliver
    assert_equal(1, BaseMailer.deliveries.length)
  end

  test "delivering message asynchronously" do
    AsyncMailer.delivery_method = :test
    AsyncMailer.deliveries.clear

    AsyncMailer.welcome.deliver
    assert_equal 0, AsyncMailer.deliveries.length

    AsyncMailer.queue.drain
    assert_equal 1, AsyncMailer.deliveries.length
  end

  test "calling deliver, ActionMailer should yield back to mail to let it call :do_delivery on itself" do
    mail = Mail::Message.new
    mail.expects(:do_delivery).once
    BaseMailer.expects(:welcome).returns(mail)
    BaseMailer.welcome.deliver
  end

  # Rendering
  test "you can specify a different template for implicit render" do
    mail = BaseMailer.implicit_different_template('implicit_multipart').deliver
    assert_equal("HTML Implicit Multipart", mail.html_part.body.decoded)
    assert_equal("TEXT Implicit Multipart", mail.text_part.body.decoded)
  end

  test "should raise if missing template in implicit render" do
    BaseMailer.deliveries.clear
    assert_raises ActionView::MissingTemplate do
      BaseMailer.implicit_different_template('missing_template').deliver
    end
    assert_equal(0, BaseMailer.deliveries.length)
  end

  test "you can specify a different template for explicit render" do
    mail = BaseMailer.explicit_different_template('explicit_multipart_templates').deliver
    assert_equal("HTML Explicit Multipart Templates", mail.html_part.body.decoded)
    assert_equal("TEXT Explicit Multipart Templates", mail.text_part.body.decoded)
  end

  test "you can specify a different layout" do
    mail = BaseMailer.different_layout('different_layout').deliver
    assert_equal("HTML -- HTML", mail.html_part.body.decoded)
    assert_equal("PLAIN -- PLAIN", mail.text_part.body.decoded)
  end

  test "you can specify the template path for implicit lookup" do
    mail = BaseMailer.welcome_from_another_path('another.path/base_mailer').deliver
    assert_equal("Welcome from another path", mail.body.encoded)

    mail = BaseMailer.welcome_from_another_path(['unknown/invalid', 'another.path/base_mailer']).deliver
    assert_equal("Welcome from another path", mail.body.encoded)
  end

  test "assets tags should use ActionMailer's asset_host settings" do
    ActionMailer::Base.config.asset_host = "http://global.com"
    ActionMailer::Base.config.assets_dir = "global/"

    mail = AssetMailer.welcome

    assert_equal(%{<img alt="Dummy" src="http://global.com/images/dummy.png" />}, mail.body.to_s.strip)
  end

  test "assets tags should use a Mailer's asset_host settings when available" do
    begin
      ActionMailer::Base.config.asset_host = "http://global.com"
      ActionMailer::Base.config.assets_dir = "global/"

      AssetMailer.asset_host = "http://local.com"

      mail = AssetMailer.welcome

      assert_equal(%{<img alt="Dummy" src="http://local.com/images/dummy.png" />}, mail.body.to_s.strip)
    ensure
      AssetMailer.asset_host = ActionMailer::Base.config.asset_host
    end
  end

  test 'the view is not rendered when mail was never called' do
    mail = BaseMailer.without_mail_call
    assert_equal('', mail.body.to_s.strip)
    mail.deliver
  end

  test 'the return value of mailer methods is not relevant' do
    mail = BaseMailer.with_nil_as_return_value
    assert_equal('Welcome', mail.body.to_s.strip)
    mail.deliver
  end

  # Before and After hooks

  class MyObserver
    def self.delivered_email(mail)
    end
  end

  class MySecondObserver
    def self.delivered_email(mail)
    end
  end

  test "you can register an observer to the mail object that gets informed on email delivery" do
    ActionMailer::Base.register_observer(MyObserver)
    mail = BaseMailer.welcome
    MyObserver.expects(:delivered_email).with(mail)
    mail.deliver
  end

  test "you can register an observer using its stringified name to the mail object that gets informed on email delivery" do
    ActionMailer::Base.register_observer("BaseTest::MyObserver")
    mail = BaseMailer.welcome
    MyObserver.expects(:delivered_email).with(mail)
    mail.deliver
  end

  test "you can register multiple observers to the mail object that both get informed on email delivery" do
    ActionMailer::Base.register_observers("BaseTest::MyObserver", MySecondObserver)
    mail = BaseMailer.welcome
    MyObserver.expects(:delivered_email).with(mail)
    MySecondObserver.expects(:delivered_email).with(mail)
    mail.deliver
  end

  class MyInterceptor
    def self.delivering_email(mail)
    end
  end

  class MySecondInterceptor
    def self.delivering_email(mail)
    end
  end

  test "you can register an interceptor to the mail object that gets passed the mail object before delivery" do
    ActionMailer::Base.register_interceptor(MyInterceptor)
    mail = BaseMailer.welcome
    MyInterceptor.expects(:delivering_email).with(mail)
    mail.deliver
  end

  test "you can register an interceptor using its stringified name to the mail object that gets passed the mail object before delivery" do
    ActionMailer::Base.register_interceptor("BaseTest::MyInterceptor")
    mail = BaseMailer.welcome
    MyInterceptor.expects(:delivering_email).with(mail)
    mail.deliver
  end

  test "you can register multiple interceptors to the mail object that both get passed the mail object before delivery" do
    ActionMailer::Base.register_interceptors("BaseTest::MyInterceptor", MySecondInterceptor)
    mail = BaseMailer.welcome
    MyInterceptor.expects(:delivering_email).with(mail)
    MySecondInterceptor.expects(:delivering_email).with(mail)
    mail.deliver
  end

  test "being able to put proc's into the defaults hash and they get evaluated on mail sending" do
    mail1 = ProcMailer.welcome['X-Proc-Method']
    yesterday = 1.day.ago
    Time.stubs(:now).returns(yesterday)
    mail2 = ProcMailer.welcome['X-Proc-Method']
    assert(mail1.to_s.to_i > mail2.to_s.to_i)
  end

  test "we can call other defined methods on the class as needed" do
    mail = ProcMailer.welcome
    assert_equal("Thanks for signing up this afternoon", mail.subject)
  end

  test "modifying the mail message with a before_action" do
    class BeforeActionMailer < ActionMailer::Base
      before_action :add_special_header!

      def welcome ; mail ; end

      private
      def add_special_header!
        headers('X-Special-Header' => 'Wow, so special')
      end
    end

    assert_equal('Wow, so special', BeforeActionMailer.welcome['X-Special-Header'].to_s)
  end

  test "modifying the mail message with an after_action" do
    class AfterActionMailer < ActionMailer::Base
      after_action :add_special_header!

      def welcome ; mail ; end

      private
      def add_special_header!
        headers('X-Special-Header' => 'Testing')
      end
    end

    assert_equal('Testing', AfterActionMailer.welcome['X-Special-Header'].to_s)
  end

  test "adding an inline attachment using a before_action" do
    class DefaultInlineAttachmentMailer < ActionMailer::Base
      before_action :add_inline_attachment!

      def welcome ; mail ; end

      private
      def add_inline_attachment!
        attachments.inline["footer.jpg"] = 'hey there'
      end
    end

    mail = DefaultInlineAttachmentMailer.welcome
    assert_equal('image/jpeg; filename=footer.jpg', mail.attachments.inline.first['Content-Type'].to_s)
  end

  test "action methods should be refreshed after defining new method" do
    class FooMailer < ActionMailer::Base
      # this triggers action_methods
      self.respond_to?(:foo)

      def notify
      end
    end

    assert_equal Set.new(["notify"]), FooMailer.action_methods
  end

  test "mailer can be anonymous" do
    mailer = Class.new(ActionMailer::Base) do
      def welcome
        mail
      end
    end

    assert_equal "anonymous", mailer.mailer_name

    assert_equal "Welcome", mailer.welcome.subject
    assert_equal "Anonymous mailer body", mailer.welcome.body.encoded.strip
  end

  test "default_from can be set" do
    class DefaultFromMailer < ActionMailer::Base
      default to: 'system@test.lindsaar.net'
      self.default_options = {from: "robert.pankowecki@gmail.com"}

      def welcome
        mail(subject: "subject", body: "hello world")
      end
    end

    assert_equal ["robert.pankowecki@gmail.com"], DefaultFromMailer.welcome.from
  end

  protected

    # Execute the block setting the given values and restoring old values after
    # the block is executed.
    def swap(klass, new_values)
      old_values = {}
      new_values.each do |key, value|
        old_values[key] = klass.send key
        klass.send :"#{key}=", value
      end
      yield
    ensure
      old_values.each do |key, value|
        klass.send :"#{key}=", value
      end
    end

    def with_default(klass, new_values)
      old = klass.default_params
      klass.default(new_values)
      yield
    ensure
      klass.default_params = old
    end
end