aboutsummaryrefslogtreecommitdiffstats
path: root/activesupport/test/new_callbacks_test.rb
blob: 04db376fc6073f9a8c2a3ee7d869ddc42beba13f (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
# require 'abstract_unit'
require 'test/unit'
$:.unshift "#{File.dirname(__FILE__)}/../lib"
require 'active_support'

module NewCallbacksTest
  class Record
    include ActiveSupport::NewCallbacks

    define_callbacks :save
  
    def self.before_save(*filters, &blk)
      set_callback(:save, :before, *filters, &blk)
    end
  
    def self.after_save(*filters, &blk)
      set_callback(:save, :after, *filters, &blk)
    end

    class << self
      def callback_symbol(callback_method)
        method_name = :"#{callback_method}_method"
        define_method(method_name) do
          history << [callback_method, :symbol]
        end
        method_name
      end

      def callback_string(callback_method)
        "history << [#{callback_method.to_sym.inspect}, :string]"
      end

      def callback_proc(callback_method)
        Proc.new { |model| model.history << [callback_method, :proc] }
      end

      def callback_object(callback_method)
        klass = Class.new
        klass.send(:define_method, callback_method) do |model|
          model.history << [:"#{callback_method}_save", :object]
        end
        klass.new
      end
    end

    def history
      @history ||= []
    end
  end

  class Person < Record
    [:before_save, :after_save].each do |callback_method|
      callback_method_sym = callback_method.to_sym
      send(callback_method, callback_symbol(callback_method_sym))
      send(callback_method, callback_string(callback_method_sym))
      send(callback_method, callback_proc(callback_method_sym))
      send(callback_method, callback_object(callback_method_sym.to_s.gsub(/_save/, '')))
      send(callback_method) { |model| model.history << [callback_method_sym, :block] }
    end

    def save
      _run_save_callbacks {}
    end
  end

  class PersonSkipper < Person
    skip_callback :save, :before, :before_save_method, :if => :yes
    skip_callback :save, :after, :before_save_method, :unless => :yes
    skip_callback :save, :after, :before_save_method, :if => :no
    skip_callback :save, :before, :before_save_method, :unless => :no
    def yes; true; end
    def no; false; end
  end

  class ParentController
    include ActiveSupport::NewCallbacks

    define_callbacks :dispatch
    
    set_callback :dispatch, :before, :log, :per_key => {:unless => proc {|c| c.action_name == :index || c.action_name == :show }}
    set_callback :dispatch, :after, :log2
  
    attr_reader :action_name, :logger
    def initialize(action_name)
      @action_name, @logger = action_name, []
    end
  
    def log
      @logger << action_name
    end
  
    def log2
      @logger << action_name
    end
  
    def dispatch
      _run_dispatch_callbacks(action_name) {
        @logger << "Done"
      }
      self
    end
  end

  class Child < ParentController
    skip_callback :dispatch, :before, :log, :per_key => {:if => proc {|c| c.action_name == :update} }
    skip_callback :dispatch, :after, :log2
  end

  class OneTimeCompile < Record
    @@starts_true, @@starts_false = true, false
  
    def initialize
      super
    end
  
    before_save Proc.new {|r| r.history << [:before_save, :starts_true, :if] }, :per_key => {:if => :starts_true}
    before_save Proc.new {|r| r.history << [:before_save, :starts_false, :if] }, :per_key => {:if => :starts_false}
    before_save Proc.new {|r| r.history << [:before_save, :starts_true, :unless] }, :per_key => {:unless => :starts_true}
    before_save Proc.new {|r| r.history << [:before_save, :starts_false, :unless] }, :per_key => {:unless => :starts_false}
  
    def starts_true
      if @@starts_true
        @@starts_true = false
        return true
      end
      @@starts_true
    end
  
    def starts_false
      unless @@starts_false
        @@starts_false = true
        return false
      end
      @@starts_false
    end
  
    def save
      _run_save_callbacks(:action) {}
    end
  end

  class OneTimeCompileTest < Test::Unit::TestCase
    def test_optimized_first_compile
      around = OneTimeCompile.new
      around.save
      assert_equal [
        [:before_save, :starts_true, :if],
        [:before_save, :starts_true, :unless]
      ], around.history
    end
  end

  class ConditionalPerson < Record
    # proc
    before_save Proc.new { |r| r.history << [:before_save, :proc] }, :if => Proc.new { |r| true }
    before_save Proc.new { |r| r.history << "b00m" }, :if => Proc.new { |r| false }
    before_save Proc.new { |r| r.history << [:before_save, :proc] }, :unless => Proc.new { |r| false }
    before_save Proc.new { |r| r.history << "b00m" }, :unless => Proc.new { |r| true }
    # symbol
    before_save Proc.new { |r| r.history << [:before_save, :symbol] }, :if => :yes
    before_save Proc.new { |r| r.history << "b00m" }, :if => :no
    before_save Proc.new { |r| r.history << [:before_save, :symbol] }, :unless => :no
    before_save Proc.new { |r| r.history << "b00m" }, :unless => :yes
    # string
    before_save Proc.new { |r| r.history << [:before_save, :string] }, :if => 'yes'
    before_save Proc.new { |r| r.history << "b00m" }, :if => 'no'
    before_save Proc.new { |r| r.history << [:before_save, :string] }, :unless => 'no'
    before_save Proc.new { |r| r.history << "b00m" }, :unless => 'yes'
    # Combined if and unless
    before_save Proc.new { |r| r.history << [:before_save, :combined_symbol] }, :if => :yes, :unless => :no
    before_save Proc.new { |r| r.history << "b00m" }, :if => :yes, :unless => :yes

    def yes; true; end
    def other_yes; true; end
    def no; false; end
    def other_no; false; end

    def save
      _run_save_callbacks {}
    end
  end

  class CleanPerson < ConditionalPerson
    reset_callbacks :save
  end

  class MySuper
    include ActiveSupport::NewCallbacks
    define_callbacks :save
  end

  class AroundPerson < MySuper
    attr_reader :history
  
    set_callback :save, :before, :nope,           :if =>     :no
    set_callback :save, :before, :nope,           :unless => :yes
    set_callback :save, :after,  :tweedle
    set_callback :save, :before, "tweedle_dee"
    set_callback :save, :before, proc {|m| m.history << "yup" }
    set_callback :save, :before, :nope,           :if =>     proc { false }
    set_callback :save, :before, :nope,           :unless => proc { true }
    set_callback :save, :before, :yup,            :if =>     proc { true }
    set_callback :save, :before, :yup,            :unless => proc { false }
    set_callback :save, :around, :tweedle_dum
    set_callback :save, :around, :w0tyes,         :if =>     :yes
    set_callback :save, :around, :w0tno,          :if =>     :no
    set_callback :save, :around, :tweedle_deedle
  
    def no; false; end
    def yes; true; end
  
    def nope
      @history << "boom"
    end
  
    def yup
      @history << "yup"
    end
  
    def w0tyes
      @history << "w0tyes before"
      yield
      @history << "w0tyes after"
    end
  
    def w0tno
      @history << "boom"
      yield
    end
  
    def tweedle_dee
      @history << "tweedle dee"
    end
  
    def tweedle_dum
      @history << "tweedle dum pre"
      yield
      @history << "tweedle dum post"
    end
  
    def tweedle
      @history << "tweedle"
    end
  
    def tweedle_deedle
      @history << "tweedle deedle pre"
      yield
      @history << "tweedle deedle post"
    end
  
    def initialize
      @history = []
    end
  
    def save
      _run_save_callbacks do
        @history << "running"
      end
    end
  end

  class HyphenatedCallbacks
    include ActiveSupport::NewCallbacks
    define_callbacks :save
    attr_reader :stuff
    
    set_callback :save, :before, :omg, :per_key => {:if => :yes}
    
    def yes() true end
      
    def omg
      @stuff = "OMG"
    end
    
    def save
      _run_save_callbacks("hyphen-ated") do
        @stuff
      end
    end
  end

  class AroundCallbacksTest < Test::Unit::TestCase
    def test_save_around
      around = AroundPerson.new
      around.save
      assert_equal [
        "tweedle dee",
        "yup", "yup",
        "tweedle dum pre",
        "w0tyes before",
        "tweedle deedle pre",
        "running",
        "tweedle deedle post",
        "w0tyes after",
        "tweedle dum post",
        "tweedle"
      ], around.history
    end
  end

  class SkipCallbacksTest < Test::Unit::TestCase
    def test_skip_person
      person = PersonSkipper.new
      assert_equal [], person.history
      person.save
      assert_equal [
        [:before_save, :string],
        [:before_save, :proc],
        [:before_save, :object],
        [:before_save, :block],
        [:after_save, :block],
        [:after_save, :object],
        [:after_save, :proc],
        [:after_save, :string],
        [:after_save, :symbol]
      ], person.history
    end
  end

  class CallbacksTest < Test::Unit::TestCase
    def test_save_person
      person = Person.new
      assert_equal [], person.history
      person.save
      assert_equal [
        [:before_save, :symbol],
        [:before_save, :string],
        [:before_save, :proc],
        [:before_save, :object],
        [:before_save, :block],
        [:after_save, :block],
        [:after_save, :object],
        [:after_save, :proc],
        [:after_save, :string],
        [:after_save, :symbol]
      ], person.history
    end
  end

  class ConditionalCallbackTest < Test::Unit::TestCase
    def test_save_conditional_person
      person = ConditionalPerson.new
      person.save
      assert_equal [
        [:before_save, :proc],
        [:before_save, :proc],
        [:before_save, :symbol],
        [:before_save, :symbol],
        [:before_save, :string],
        [:before_save, :string],
        [:before_save, :combined_symbol],
      ], person.history
    end
  end

  class ResetCallbackTest < Test::Unit::TestCase
    def test_save_conditional_person
      person = CleanPerson.new
      person.save
      assert_equal [], person.history
    end
  end

  class CallbackTerminator
    include ActiveSupport::NewCallbacks
  
    define_callbacks :save, :terminator => "result == :halt"
  
    set_callback :save, :before, :first
    set_callback :save, :before, :second
    set_callback :save, :around, :around_it  
    set_callback :save, :before, :third
    set_callback :save, :after, :first
    set_callback :save, :around, :around_it
    set_callback :save, :after, :second
    set_callback :save, :around, :around_it
    set_callback :save, :after, :third

  
    attr_reader :history, :saved
    def initialize
      @history = []
    end
  
    def around_it
      @history << "around1"
      yield
      @history << "around2"
    end
  
    def first
      @history << "first"
    end
  
    def second
      @history << "second"
      :halt
    end
  
    def third
      @history << "third"
    end
  
    def save
      _run_save_callbacks do
        @saved = true
      end
    end
  end

  class CallbackObject
    def before(caller)
      caller.record << "before"
    end

    def before_save(caller)
      caller.record << "before save"
    end

    def around(caller)
      caller.record << "around before"
      yield
      caller.record << "around after"
    end
  end

  class UsingObjectBefore
    include ActiveSupport::NewCallbacks

    define_callbacks :save
    set_callback :save, :before, CallbackObject.new

    attr_accessor :record
    def initialize
      @record = []
    end

    def save
      _run_save_callbacks do
        @record << "yielded"
      end
    end 
  end

  class UsingObjectAround
    include ActiveSupport::NewCallbacks
    
    define_callbacks :save
    set_callback :save, :around, CallbackObject.new
    
    attr_accessor :record
    def initialize
      @record = []
    end
    
    def save
      _run_save_callbacks do
        @record << "yielded"
      end
    end 
  end

  class CustomScopeObject
    include ActiveSupport::NewCallbacks

    define_callbacks :save, :scope => [:kind, :name]
    set_callback :save, :before, CallbackObject.new

    attr_accessor :record
    def initialize
      @record = []
    end

    def save
      _run_save_callbacks do
        @record << "yielded"
        "CallbackResult"
      end
    end 
  end

  class UsingObjectTest < Test::Unit::TestCase
    def test_before_object
      u = UsingObjectBefore.new
      u.save
      assert_equal ["before", "yielded"], u.record
    end

    def test_around_object
      u = UsingObjectAround.new
      u.save
      assert_equal ["around before", "yielded", "around after"], u.record
    end

    def test_customized_object
      u = CustomScopeObject.new
      u.save
      assert_equal ["before save", "yielded"], u.record
    end

    def test_block_result_is_returned
      u = CustomScopeObject.new
      assert_equal "CallbackResult", u.save
    end
  end

  class CallbackTerminatorTest < Test::Unit::TestCase
    def test_termination
      terminator = CallbackTerminator.new
      terminator.save
      assert_equal ["first", "second", "third", "second", "first"], terminator.history
    end
    
    def test_block_never_called_if_terminated
      obj = CallbackTerminator.new
      obj.save
      assert !obj.saved
    end
  end
  
  class HyphenatedKeyTest < Test::Unit::TestCase
    def test_save
      obj = HyphenatedCallbacks.new
      obj.save
      assert_equal obj.stuff, "OMG"
    end
  end
end