forked from thoughtbot/shoulda
/
active_record_helpers.rb
494 lines (455 loc) · 20.5 KB
/
active_record_helpers.rb
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
module ThoughtBot # :nodoc:
module Shoulda # :nodoc:
# = Macro test helpers for your active record models
#
# These helpers will test most of the validations and associations for your ActiveRecord models.
#
# class UserTest < Test::Unit::TestCase
# should_require_attributes :name, :phone_number
# should_not_allow_values_for :phone_number, "abcd", "1234"
# should_allow_values_for :phone_number, "(123) 456-7890"
#
# should_protect_attributes :password
#
# should_have_one :profile
# should_have_many :dogs
# should_have_many :messes, :through => :dogs
# should_belong_to :lover
# end
#
# For all of these helpers, the last parameter may be a hash of options.
#
module ActiveRecord
# Ensures that the model cannot be saved if one of the attributes listed is not present.
#
# Options:
# * <tt>:message</tt> - value the test expects to find in <tt>errors.on(:attribute)</tt>.
# Regexp or string. Default = <tt>/blank/</tt>
#
# Example:
# should_require_attributes :name, :phone_number
#
def should_require_attributes(*attributes)
message = get_options!(attributes, :message)
message ||= /blank/
klass = model_class
attributes.each do |attribute|
should "require #{attribute} to be set" do
object = klass.new
object.send("#{attribute}=", nil)
assert !object.valid?, "#{klass.name} does not require #{attribute}."
assert object.errors.on(attribute), "#{klass.name} does not require #{attribute}."
assert_contains(object.errors.on(attribute), message)
end
end
end
# Ensures that the model cannot be saved if one of the attributes listed is not unique.
# Requires an existing record
#
# Options:
# * <tt>:message</tt> - value the test expects to find in <tt>errors.on(:attribute)</tt>.
# Regexp or string. Default = <tt>/taken/</tt>
#
# Example:
# should_require_unique_attributes :keyword, :username
#
def should_require_unique_attributes(*attributes)
message, scope = get_options!(attributes, :message, :scoped_to)
message ||= /taken/
klass = model_class
attributes.each do |attribute|
attribute = attribute.to_sym
should "require unique value for #{attribute}#{" scoped to #{scope}" if scope}" do
assert existing = klass.find(:first), "Can't find first #{klass}"
object = klass.new
object.send(:"#{attribute}=", existing.send(attribute))
if scope
assert_respond_to object, :"#{scope}=", "#{klass.name} doesn't seem to have a #{scope} attribute."
object.send(:"#{scope}=", existing.send(scope))
end
assert !object.valid?, "#{klass.name} does not require a unique value for #{attribute}."
assert object.errors.on(attribute), "#{klass.name} does not require a unique value for #{attribute}."
assert_contains(object.errors.on(attribute), message)
if scope
# Now test that the object is valid when changing the scoped attribute
# TODO: actually find all values for scope and create a unique one.
object.send(:"#{scope}=", existing.send(scope).nil? ? 1 : existing.send(scope).next)
object.errors.clear
object.valid?
assert_does_not_contain(object.errors.on(attribute), message,
"after :#{scope} set to #{object.send(scope.to_sym)}")
end
end
end
end
# Ensures that the attribute cannot be set on update
# Requires an existing record
#
# should_protect_attributes :password, :admin_flag
#
def should_protect_attributes(*attributes)
get_options!(attributes)
klass = model_class
attributes.each do |attribute|
attribute = attribute.to_sym
should "protect #{attribute} from mass updates" do
protected = klass.protected_attributes
assert protected.include?(attribute.to_s),
"#{klass} is protecting #{protected.to_a.to_sentence}, but not #{attribute}."
end
end
end
# Ensures that the attribute cannot be set to the given values
# Requires an existing record
#
# Options:
# * <tt>:message</tt> - value the test expects to find in <tt>errors.on(:attribute)</tt>.
# Regexp or string. Default = <tt>/invalid/</tt>
#
# Example:
# should_not_allow_values_for :isbn, "bad 1", "bad 2"
#
def should_not_allow_values_for(attribute, *bad_values)
message = get_options!(bad_values, :message)
message ||= /invalid/
klass = model_class
bad_values.each do |v|
should "not allow #{attribute} to be set to \"#{v}\"" do
assert object = klass.find(:first), "Can't find first #{klass}"
object.send("#{attribute}=", v)
assert !object.save, "Saved #{klass} with #{attribute} set to \"#{v}\""
assert object.errors.on(attribute), "There are no errors set on #{attribute} after being set to \"#{v}\""
assert_contains(object.errors.on(attribute), message, "when set to \"#{v}\"")
end
end
end
# Ensures that the attribute can be set to the given values.
# Requires an existing record
#
# Options:
# * <tt>:message</tt> - value the test expects to find in <tt>errors.on(:attribute)</tt>.
# Regexp or string. Default = <tt>/invalid/</tt>
#
# Example:
# should_allow_values_for :isbn, "isbn 1 2345 6789 0", "ISBN 1-2345-6789-0"
#
def should_allow_values_for(attribute, *good_values)
message = get_options!(good_values, :message)
message ||= /invalid/
klass = model_class
good_values.each do |v|
should "allow #{attribute} to be set to \"#{v}\"" do
assert object = klass.find(:first), "Can't find first #{klass}"
object.send("#{attribute}=", v)
object.save
assert_does_not_contain(object.errors.on(attribute), message, "when set to \"#{v}\"")
end
end
end
# Ensures that the length of the attribute is in the given range
# Requires an existing record
#
# Options:
# * <tt>:short_message</tt> - value the test expects to find in <tt>errors.on(:attribute)</tt>.
# Regexp or string. Default = <tt>/short/</tt>
# * <tt>:long_message</tt> - value the test expects to find in <tt>errors.on(:attribute)</tt>.
# Regexp or string. Default = <tt>/long/</tt>
#
# Example:
# should_ensure_length_in_range :password, (6..20)
#
def should_ensure_length_in_range(attribute, range, opts = {})
short_message, long_message = get_options!([opts], :short_message, :long_message)
short_message ||= /short/
long_message ||= /long/
klass = model_class
min_length = range.first
max_length = range.last
if min_length > 0
min_value = "x" * (min_length - 1)
should "not allow #{attribute} to be less than #{min_length} chars long" do
assert object = klass.find(:first), "Can't find first #{klass}"
object.send("#{attribute}=", min_value)
assert !object.save, "Saved #{klass} with #{attribute} set to \"#{min_value}\""
assert object.errors.on(attribute), "There are no errors set on #{attribute} after being set to \"#{min_value}\""
assert_contains(object.errors.on(attribute), short_message, "when set to \"#{min_value}\"")
end
end
max_value = "x" * (max_length + 1)
should "not allow #{attribute} to be more than #{max_length} chars long" do
assert object = klass.find(:first), "Can't find first #{klass}"
object.send("#{attribute}=", max_value)
assert !object.save, "Saved #{klass} with #{attribute} set to \"#{max_value}\""
assert object.errors.on(attribute), "There are no errors set on #{attribute} after being set to \"#{max_value}\""
assert_contains(object.errors.on(attribute), long_message, "when set to \"#{max_value}\"")
end
end
# Ensure that the attribute is in the range specified
# Requires an existing record
#
# Options:
# * <tt>:low_message</tt> - value the test expects to find in <tt>errors.on(:attribute)</tt>.
# Regexp or string. Default = <tt>/included/</tt>
# * <tt>:high_message</tt> - value the test expects to find in <tt>errors.on(:attribute)</tt>.
# Regexp or string. Default = <tt>/included/</tt>
#
# Example:
# should_ensure_value_in_range :age, (0..100)
#
def should_ensure_value_in_range(attribute, range, opts = {})
low_message, high_message = get_options!([opts], :low_message, :high_message)
low_message ||= /included/
high_message ||= /included/
klass = model_class
min = range.first
max = range.last
should "not allow #{attribute} to be less than #{min}" do
v = min - 1
assert object = klass.find(:first), "Can't find first #{klass}"
object.send("#{attribute}=", v)
assert !object.save, "Saved #{klass} with #{attribute} set to \"#{v}\""
assert object.errors.on(attribute), "There are no errors set on #{attribute} after being set to \"#{v}\""
assert_contains(object.errors.on(attribute), low_message, "when set to \"#{v}\"")
end
should "allow #{attribute} to be #{min}" do
v = min
assert object = klass.find(:first), "Can't find first #{klass}"
object.send("#{attribute}=", v)
object.save
assert_does_not_contain(object.errors.on(attribute), low_message, "when set to \"#{v}\"")
end
should "not allow #{attribute} to be more than #{max}" do
v = max + 1
assert object = klass.find(:first), "Can't find first #{klass}"
object.send("#{attribute}=", v)
assert !object.save, "Saved #{klass} with #{attribute} set to \"#{v}\""
assert object.errors.on(attribute), "There are no errors set on #{attribute} after being set to \"#{v}\""
assert_contains(object.errors.on(attribute), high_message, "when set to \"#{v}\"")
end
should "allow #{attribute} to be #{max}" do
v = max
assert object = klass.find(:first), "Can't find first #{klass}"
object.send("#{attribute}=", v)
object.save
assert_does_not_contain(object.errors.on(attribute), high_message, "when set to \"#{v}\"")
end
end
# Ensure that the attribute is numeric
# Requires an existing record
#
# Options:
# * <tt>:message</tt> - value the test expects to find in <tt>errors.on(:attribute)</tt>.
# Regexp or string. Default = <tt>/number/</tt>
#
# Example:
# should_only_allow_numeric_values_for :age
#
def should_only_allow_numeric_values_for(*attributes)
message = get_options!(attributes, :message)
message ||= /number/
klass = model_class
attributes.each do |attribute|
attribute = attribute.to_sym
should "only allow numeric values for #{attribute}" do
assert object = klass.find(:first), "Can't find first #{klass}"
object.send(:"#{attribute}=", "abcd")
assert !object.valid?, "Instance is still valid"
assert_contains(object.errors.on(attribute), message)
end
end
end
# Ensures that the has_many relationship exists. Will also test that the
# associated table has the required columns. Works with polymorphic
# associations.
#
# Options:
# * <tt>:through</tt> - association name for <tt>has_many :through</tt>
#
# Example:
# should_have_many :friends
# should_have_many :enemies, :through => :friends
#
def should_have_many(*associations)
through = get_options!(associations, :through)
klass = model_class
associations.each do |association|
name = "have many #{association}"
name += " through #{through}" if through
should name do
reflection = klass.reflect_on_association(association)
assert reflection, "#{klass.name} does not have any relationship to #{association}"
assert_equal :has_many, reflection.macro
if through
through_reflection = klass.reflect_on_association(through)
assert through_reflection, "#{klass.name} does not have any relationship to #{through}"
assert_equal(through, reflection.options[:through])
end
unless reflection.options[:through]
# This is not a through association, so check for the existence of the foreign key on the other table
if reflection.options[:foreign_key]
fk = reflection.options[:foreign_key]
elsif reflection.options[:as]
fk = reflection.options[:as].to_s.foreign_key
else
fk = reflection.primary_key_name
end
associated_klass = (reflection.options[:class_name] || association.to_s.classify).constantize
assert associated_klass.column_names.include?(fk.to_s), "#{associated_klass.name} does not have a #{fk} foreign key."
end
end
end
end
# Ensure that the has_one relationship exists. Will also test that the
# associated table has the required columns. Works with polymorphic
# associations.
#
# Example:
# should_have_one :god # unless hindu
#
def should_have_one(*associations)
get_options!(associations)
klass = model_class
associations.each do |association|
should "have one #{association}" do
reflection = klass.reflect_on_association(association)
assert reflection, "#{klass.name} does not have any relationship to #{association}"
assert_equal :has_one, reflection.macro
associated_klass = (reflection.options[:class_name] || association.to_s.camelize).constantize
if reflection.options[:foreign_key]
fk = reflection.options[:foreign_key]
elsif reflection.options[:as]
fk = reflection.options[:as].to_s.foreign_key
fk_type = fk.gsub(/_id$/, '_type')
assert associated_klass.column_names.include?(fk_type),
"#{associated_klass.name} does not have a #{fk_type} column."
else
fk = klass.name.foreign_key
end
assert associated_klass.column_names.include?(fk.to_s),
"#{associated_klass.name} does not have a #{fk} foreign key."
end
end
end
# Ensures that the has_and_belongs_to_many relationship exists.
#
# should_have_and_belong_to_many :posts, :cars
#
def should_have_and_belong_to_many(*associations)
get_options!(associations)
klass = model_class
associations.each do |association|
should "should have and belong to many #{association}" do
assert klass.reflect_on_association(association), "#{klass.name} does not have any relationship to #{association}"
assert_equal :has_and_belongs_to_many, klass.reflect_on_association(association).macro
end
end
end
# Ensure that the belongs_to relationship exists.
#
# should_belong_to :parent
#
def should_belong_to(*associations)
get_options!(associations)
klass = model_class
associations.each do |association|
should "belong_to #{association}" do
reflection = klass.reflect_on_association(association)
assert reflection, "#{klass.name} does not have any relationship to #{association}"
assert_equal :belongs_to, reflection.macro
unless reflection.options[:polymorphic]
associated_klass = (reflection.options[:class_name] || association.to_s.classify).constantize
fk = reflection.options[:foreign_key] || reflection.primary_key_name
assert klass.column_names.include?(fk.to_s), "#{klass.name} does not have a #{fk} foreign key."
end
end
end
end
# Ensure that the given class methods are defined on the model.
#
# should_have_class_methods :find, :destroy
#
def should_have_class_methods(*methods)
get_options!(methods)
klass = model_class
methods.each do |method|
should "respond to class method #{method}" do
assert_respond_to klass, method, "#{klass.name} does not have class method #{method}"
end
end
end
# Ensure that the given instance methods are defined on the model.
#
# should_have_instance_methods :email, :name, :name=
#
def should_have_instance_methods(*methods)
get_options!(methods)
klass = model_class
methods.each do |method|
should "respond to instance method #{method}" do
assert_respond_to klass.new, method, "#{klass.name} does not have instance method #{method}"
end
end
end
# Ensure that the given columns are defined on the models backing SQL table.
#
# should_have_db_columns :id, :email, :name, :created_at
#
def should_have_db_columns(*columns)
column_type = get_options!(columns, :type)
klass = model_class
columns.each do |name|
test_name = "have column #{name}"
test_name += " of type #{column_type}" if column_type
should test_name do
column = klass.columns.detect {|c| c.name == name.to_s }
assert column, "#{klass.name} does not have column #{name}"
end
end
end
# Ensure that the given column is defined on the models backing SQL table. The options are the same as
# the instance variables defined on the column definition: :precision, :limit, :default, :null,
# :primary, :type, :scale, and :sql_type.
#
# should_have_db_column :email, :type => "string", :default => nil, :precision => nil, :limit => 255,
# :null => true, :primary => false, :scale => nil, :sql_type => 'varchar(255)'
#
def should_have_db_column(name, opts = {})
klass = model_class
test_name = "have column named :#{name}"
test_name += " with options " + opts.inspect unless opts.empty?
should test_name do
column = klass.columns.detect {|c| c.name == name.to_s }
assert column, "#{klass.name} does not have column #{name}"
opts.each do |k, v|
assert_equal column.instance_variable_get("@#{k}").to_s, v.to_s, ":#{name} column on table for #{klass} does not match option :#{k}"
end
end
end
# Ensures that the model cannot be saved if one of the attributes listed is not accepted.
#
# Options:
# * <tt>:message</tt> - value the test expects to find in <tt>errors.on(:attribute)</tt>.
# Regexp or string. Default = <tt>/must be accepted/</tt>
#
# Example:
# should_require_acceptance_of :eula
#
def should_require_acceptance_of(*attributes)
message = get_options!(attributes, :message)
message ||= /must be accepted/
klass = model_class
attributes.each do |attribute|
should "require #{attribute} to be accepted" do
object = klass.new
object.send("#{attribute}=", false)
assert !object.valid?, "#{klass.name} does not require acceptance of #{attribute}."
assert object.errors.on(attribute), "#{klass.name} does not require acceptance of #{attribute}."
assert_contains(object.errors.on(attribute), message)
end
end
end
private
include ThoughtBot::Shoulda::Private
end
end
end