aboutsummaryrefslogtreecommitdiffstats
path: root/activerecord/test/cases/migration_test.rb
blob: fa8dec0e15413c2af8f3aefa9c5582ed9078b578 (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
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
require "cases/helper"
require "cases/migration/helper"
require 'bigdecimal/util'

require 'models/person'
require 'models/topic'
require 'models/developer'

require MIGRATIONS_ROOT + "/valid/2_we_need_reminders"
require MIGRATIONS_ROOT + "/rename/1_we_need_things"
require MIGRATIONS_ROOT + "/rename/2_rename_things"
require MIGRATIONS_ROOT + "/decimal/1_give_me_big_numbers"

class BigNumber < ActiveRecord::Base; end

class Reminder < ActiveRecord::Base; end

class Thing < ActiveRecord::Base; end

class MigrationTest < ActiveRecord::TestCase
  self.use_transactional_fixtures = false

  fixtures :people

  def setup
    super
    %w(reminders people_reminders prefix_reminders_suffix p_things_s).each do |table|
      Reminder.connection.drop_table(table) rescue nil
    end
    Reminder.reset_column_information
    ActiveRecord::Migration.verbose = true
    ActiveRecord::Migration.message_count = 0
    ActiveRecord::Base.connection.schema_cache.clear!
  end

  def teardown
    ActiveRecord::Base.table_name_prefix = ""
    ActiveRecord::Base.table_name_suffix = ""

    ActiveRecord::Base.connection.initialize_schema_migrations_table
    ActiveRecord::Base.connection.execute "DELETE FROM #{ActiveRecord::Migrator.schema_migrations_table_name}"

    %w(things awesome_things prefix_things_suffix p_awesome_things_s ).each do |table|
      Thing.connection.drop_table(table) rescue nil
    end
    Thing.reset_column_information

    %w(reminders people_reminders prefix_reminders_suffix).each do |table|
      Reminder.connection.drop_table(table) rescue nil
    end
    Reminder.reset_table_name
    Reminder.reset_column_information

    %w(last_name key bio age height wealth birthday favorite_day
       moment_of_truth male administrator funny).each do |column|
      Person.connection.remove_column('people', column) rescue nil
    end
    Person.connection.remove_column("people", "first_name") rescue nil
    Person.connection.remove_column("people", "middle_name") rescue nil
    Person.connection.add_column("people", "first_name", :string, :limit => 40)
    Person.reset_column_information
  end

  def test_migrator_versions
    migrations_path = MIGRATIONS_ROOT + "/valid"
    ActiveRecord::Migrator.migrations_paths = migrations_path

    ActiveRecord::Migrator.up(migrations_path)
    assert_equal 3, ActiveRecord::Migrator.current_version
    assert_equal 3, ActiveRecord::Migrator.last_version
    assert_equal false, ActiveRecord::Migrator.needs_migration?

    ActiveRecord::Migrator.down(MIGRATIONS_ROOT + "/valid")
    assert_equal 0, ActiveRecord::Migrator.current_version
    assert_equal 3, ActiveRecord::Migrator.last_version
    assert_equal true, ActiveRecord::Migrator.needs_migration?
  end

  def test_create_table_with_force_true_does_not_drop_nonexisting_table
    if Person.connection.table_exists?(:testings2)
      Person.connection.drop_table :testings2
    end

    # using a copy as we need the drop_table method to
    # continue to work for the ensure block of the test
    temp_conn = Person.connection.dup

    assert_not_equal temp_conn, Person.connection

    temp_conn.create_table :testings2, :force => true do |t|
      t.column :foo, :string
    end
  ensure
    Person.connection.drop_table :testings2 rescue nil
  end

  def connection
    ActiveRecord::Base.connection
  end

  def test_migration_instance_has_connection
    migration = Class.new(ActiveRecord::Migration).new
    assert_equal connection, migration.connection
  end

  def test_method_missing_delegates_to_connection
    migration = Class.new(ActiveRecord::Migration) {
      def connection
        Class.new {
          def create_table; "hi mom!"; end
        }.new
      end
    }.new

    assert_equal "hi mom!", migration.method_missing(:create_table)
  end

  def test_add_table_with_decimals
    Person.connection.drop_table :big_numbers rescue nil

    assert !BigNumber.table_exists?
    GiveMeBigNumbers.up

    assert BigNumber.create(
      :bank_balance => 1586.43,
      :big_bank_balance => BigDecimal("1000234000567.95"),
      :world_population => 6000000000,
      :my_house_population => 3,
      :value_of_e => BigDecimal("2.7182818284590452353602875")
    )

    b = BigNumber.first
    assert_not_nil b

    assert_not_nil b.bank_balance
    assert_not_nil b.big_bank_balance
    assert_not_nil b.world_population
    assert_not_nil b.my_house_population
    assert_not_nil b.value_of_e

    # TODO: set world_population >= 2**62 to cover 64-bit platforms and test
    # is_a?(Bignum)
    assert_kind_of Integer, b.world_population
    assert_equal 6000000000, b.world_population
    assert_kind_of Fixnum, b.my_house_population
    assert_equal 3, b.my_house_population
    assert_kind_of BigDecimal, b.bank_balance
    assert_equal BigDecimal("1586.43"), b.bank_balance
    assert_kind_of BigDecimal, b.big_bank_balance
    assert_equal BigDecimal("1000234000567.95"), b.big_bank_balance

    # This one is fun. The 'value_of_e' field is defined as 'DECIMAL' with
    # precision/scale explicitly left out.  By the SQL standard, numbers
    # assigned to this field should be truncated but that's seldom respected.
    if current_adapter?(:PostgreSQLAdapter)
      # - PostgreSQL changes the SQL spec on columns declared simply as
      # "decimal" to something more useful: instead of being given a scale
      # of 0, they take on the compile-time limit for precision and scale,
      # so the following should succeed unless you have used really wacky
      # compilation options
      # - SQLite2 has the default behavior of preserving all data sent in,
      # so this happens there too
      assert_kind_of BigDecimal, b.value_of_e
      assert_equal BigDecimal("2.7182818284590452353602875"), b.value_of_e
    elsif current_adapter?(:SQLite3Adapter)
      # - SQLite3 stores a float, in violation of SQL
      assert_kind_of BigDecimal, b.value_of_e
      assert_in_delta BigDecimal("2.71828182845905"), b.value_of_e, 0.00000000000001
    else
      # - SQL standard is an integer
      assert_kind_of Fixnum, b.value_of_e
      assert_equal 2, b.value_of_e
    end

    GiveMeBigNumbers.down
    assert_raise(ActiveRecord::StatementInvalid) { BigNumber.first }
  end

  def test_filtering_migrations
    assert !Person.column_methods_hash.include?(:last_name)
    assert !Reminder.table_exists?

    name_filter = lambda { |migration| migration.name == "ValidPeopleHaveLastNames" }
    ActiveRecord::Migrator.up(MIGRATIONS_ROOT + "/valid", &name_filter)

    Person.reset_column_information
    assert Person.column_methods_hash.include?(:last_name)
    assert_raise(ActiveRecord::StatementInvalid) { Reminder.first }

    ActiveRecord::Migrator.down(MIGRATIONS_ROOT + "/valid", &name_filter)

    Person.reset_column_information
    assert !Person.column_methods_hash.include?(:last_name)
    assert_raise(ActiveRecord::StatementInvalid) { Reminder.first }
  end

  class MockMigration < ActiveRecord::Migration
    attr_reader :went_up, :went_down
    def initialize
      @went_up   = false
      @went_down = false
    end

    def up
      @went_up = true
      super
    end

    def down
      @went_down = true
      super
    end
  end

  def test_instance_based_migration_up
    migration = MockMigration.new
    assert !migration.went_up, 'have not gone up'
    assert !migration.went_down, 'have not gone down'

    migration.migrate :up
    assert migration.went_up, 'have gone up'
    assert !migration.went_down, 'have not gone down'
  end

  def test_instance_based_migration_down
    migration = MockMigration.new
    assert !migration.went_up, 'have not gone up'
    assert !migration.went_down, 'have not gone down'

    migration.migrate :down
    assert !migration.went_up, 'have gone up'
    assert migration.went_down, 'have not gone down'
  end

  def test_migrator_one_up_with_exception_and_rollback
    unless ActiveRecord::Base.connection.supports_ddl_transactions?
      skip "not supported on #{ActiveRecord::Base.connection.class}"
    end

    assert_not Person.column_methods_hash.include?(:last_name)

    migration = Struct.new(:name, :version) {
      def migrate(x); raise 'Something broke'; end
    }.new('zomg', 100)

    migrator = ActiveRecord::Migrator.new(:up, [migration], 100)

    e = assert_raise(StandardError) { migrator.migrate }

    assert_equal "An error has occurred, this and all later migrations canceled:\n\nSomething broke", e.message

    Person.reset_column_information
    assert_not Person.column_methods_hash.include?(:last_name)
  end

  def test_schema_migrations_table_name
    ActiveRecord::Base.table_name_prefix = "prefix_"
    ActiveRecord::Base.table_name_suffix = "_suffix"
    Reminder.reset_table_name
    assert_equal "prefix_schema_migrations_suffix", ActiveRecord::Migrator.schema_migrations_table_name
    ActiveRecord::Base.table_name_prefix = ""
    ActiveRecord::Base.table_name_suffix = ""
    Reminder.reset_table_name
    assert_equal "schema_migrations", ActiveRecord::Migrator.schema_migrations_table_name
  end

  def test_proper_table_name
    assert_equal "table", ActiveRecord::Migrator.proper_table_name('table')
    assert_equal "table", ActiveRecord::Migrator.proper_table_name(:table)
    assert_equal "reminders", ActiveRecord::Migrator.proper_table_name(Reminder)
    Reminder.reset_table_name
    assert_equal Reminder.table_name, ActiveRecord::Migrator.proper_table_name(Reminder)

    # Use the model's own prefix/suffix if a model is given
    ActiveRecord::Base.table_name_prefix = "ARprefix_"
    ActiveRecord::Base.table_name_suffix = "_ARsuffix"
    Reminder.table_name_prefix = 'prefix_'
    Reminder.table_name_suffix = '_suffix'
    Reminder.reset_table_name
    assert_equal "prefix_reminders_suffix", ActiveRecord::Migrator.proper_table_name(Reminder)
    Reminder.table_name_prefix = ''
    Reminder.table_name_suffix = ''
    Reminder.reset_table_name

    # Use AR::Base's prefix/suffix if string or symbol is given
    ActiveRecord::Base.table_name_prefix = "prefix_"
    ActiveRecord::Base.table_name_suffix = "_suffix"
    Reminder.reset_table_name
    assert_equal "prefix_table_suffix", ActiveRecord::Migrator.proper_table_name('table')
    assert_equal "prefix_table_suffix", ActiveRecord::Migrator.proper_table_name(:table)
  end

  def test_rename_table_with_prefix_and_suffix
    assert !Thing.table_exists?
    ActiveRecord::Base.table_name_prefix = 'p_'
    ActiveRecord::Base.table_name_suffix = '_s'
    Thing.reset_table_name
    Thing.reset_sequence_name
    WeNeedThings.up

    assert Thing.create("content" => "hello world")
    assert_equal "hello world", Thing.first.content

    RenameThings.up
    Thing.table_name = "p_awesome_things_s"

    assert_equal "hello world", Thing.first.content
  ensure
    Thing.reset_table_name
    Thing.reset_sequence_name
  end

  def test_add_drop_table_with_prefix_and_suffix
    assert !Reminder.table_exists?
    ActiveRecord::Base.table_name_prefix = 'prefix_'
    ActiveRecord::Base.table_name_suffix = '_suffix'
    Reminder.reset_table_name
    Reminder.reset_sequence_name
    WeNeedReminders.up
    assert Reminder.create("content" => "hello world", "remind_at" => Time.now)
    assert_equal "hello world", Reminder.first.content

    WeNeedReminders.down
    assert_raise(ActiveRecord::StatementInvalid) { Reminder.first }
  ensure
    Reminder.reset_sequence_name
  end

  def test_create_table_with_binary_column
    Person.connection.drop_table :binary_testings rescue nil

    assert_nothing_raised {
      Person.connection.create_table :binary_testings do |t|
        t.column "data", :binary, :null => false
      end
    }

    columns = Person.connection.columns(:binary_testings)
    data_column = columns.detect { |c| c.name == "data" }

    assert_nil data_column.default

    Person.connection.drop_table :binary_testings rescue nil
  end

  def test_create_table_with_custom_sequence_name
    skip "not supported" unless current_adapter? :OracleAdapter

    # table name is 29 chars, the standard sequence name will
    # be 33 chars and should be shortened
    assert_nothing_raised do
      begin
        Person.connection.create_table :table_with_name_thats_just_ok do |t|
          t.column :foo, :string, :null => false
        end
      ensure
        Person.connection.drop_table :table_with_name_thats_just_ok rescue nil
      end
    end

    # should be all good w/ a custom sequence name
    assert_nothing_raised do
      begin
        Person.connection.create_table :table_with_name_thats_just_ok,
                                       :sequence_name => 'suitably_short_seq' do |t|
          t.column :foo, :string, :null => false
        end

        Person.connection.execute("select suitably_short_seq.nextval from dual")

      ensure
        Person.connection.drop_table :table_with_name_thats_just_ok,
                                     :sequence_name => 'suitably_short_seq' rescue nil
      end
    end

    # confirm the custom sequence got dropped
    assert_raise(ActiveRecord::StatementInvalid) do
      Person.connection.execute("select suitably_short_seq.nextval from dual")
    end
  end

  def test_out_of_range_limit_should_raise
    skip("MySQL and PostgreSQL only") unless current_adapter?(:MysqlAdapter, :Mysql2Adapter, :PostgreSQLAdapter)

    Person.connection.drop_table :test_limits rescue nil
    assert_raise(ActiveRecord::ActiveRecordError, "integer limit didn't raise") do
      Person.connection.create_table :test_integer_limits, :force => true do |t|
        t.column :bigone, :integer, :limit => 10
      end
    end

    unless current_adapter?(:PostgreSQLAdapter)
      assert_raise(ActiveRecord::ActiveRecordError, "text limit didn't raise") do
        Person.connection.create_table :test_text_limits, :force => true do |t|
          t.column :bigtext, :text, :limit => 0xfffffffff
        end
      end
    end

    Person.connection.drop_table :test_limits rescue nil
  end

  protected
    def with_env_tz(new_tz = 'US/Eastern')
      old_tz, ENV['TZ'] = ENV['TZ'], new_tz
      yield
    ensure
      old_tz ? ENV['TZ'] = old_tz : ENV.delete('TZ')
    end
end

class ReservedWordsMigrationTest < ActiveRecord::TestCase
  def test_drop_index_from_table_named_values
    connection = Person.connection
    connection.create_table :values, :force => true do |t|
      t.integer :value
    end

    assert_nothing_raised do
      connection.add_index :values, :value
      connection.remove_index :values, :column => :value
    end

    connection.drop_table :values rescue nil
  end
end

if ActiveRecord::Base.connection.supports_bulk_alter?
  class BulkAlterTableMigrationsTest < ActiveRecord::TestCase
    def setup
      @connection = Person.connection
      @connection.create_table(:delete_me, :force => true) {|t| }
      Person.reset_column_information
      Person.reset_sequence_name
    end

    def teardown
      Person.connection.drop_table(:delete_me) rescue nil
    end

    def test_adding_multiple_columns
      assert_queries(1) do
        with_bulk_change_table do |t|
          t.column :name, :string
          t.string :qualification, :experience
          t.integer :age, :default => 0
          t.date :birthdate
          t.timestamps
        end
      end

      assert_equal 8, columns.size
      [:name, :qualification, :experience].each {|s| assert_equal :string, column(s).type }
      assert_equal 0, column(:age).default
    end

    def test_removing_columns
      with_bulk_change_table do |t|
        t.string :qualification, :experience
      end

      [:qualification, :experience].each {|c| assert column(c) }

      assert_queries(1) do
        with_bulk_change_table do |t|
          t.remove :qualification, :experience
          t.string :qualification_experience
        end
      end

      [:qualification, :experience].each {|c| assert ! column(c) }
      assert column(:qualification_experience)
    end

    def test_adding_indexes
      with_bulk_change_table do |t|
        t.string :username
        t.string :name
        t.integer :age
      end

      # Adding an index fires a query every time to check if an index already exists or not
      assert_queries(3) do
        with_bulk_change_table do |t|
          t.index :username, :unique => true, :name => :awesome_username_index
          t.index [:name, :age]
        end
      end

      assert_equal 2, indexes.size

      name_age_index = index(:index_delete_me_on_name_and_age)
      assert_equal ['name', 'age'].sort, name_age_index.columns.sort
      assert ! name_age_index.unique

      assert index(:awesome_username_index).unique
    end

    def test_removing_index
      with_bulk_change_table do |t|
        t.string :name
        t.index :name
      end

      assert index(:index_delete_me_on_name)

      assert_queries(3) do
        with_bulk_change_table do |t|
          t.remove_index :name
          t.index :name, :name => :new_name_index, :unique => true
        end
      end

      assert ! index(:index_delete_me_on_name)

      new_name_index = index(:new_name_index)
      assert new_name_index.unique
    end

    def test_changing_columns
      with_bulk_change_table do |t|
        t.string :name
        t.date :birthdate
      end

      assert ! column(:name).default
      assert_equal :date, column(:birthdate).type

      # One query for columns (delete_me table)
      # One query for primary key (delete_me table)
      # One query to do the bulk change
      assert_queries(3, :ignore_none => true) do
        with_bulk_change_table do |t|
          t.change :name, :string, :default => 'NONAME'
          t.change :birthdate, :datetime
        end
      end

      assert_equal 'NONAME', column(:name).default
      assert_equal :datetime, column(:birthdate).type
    end

    protected

    def with_bulk_change_table
      # Reset columns/indexes cache as we're changing the table
      @columns = @indexes = nil

      Person.connection.change_table(:delete_me, :bulk => true) do |t|
        yield t
      end
    end

    def column(name)
      columns.detect {|c| c.name == name.to_s }
    end

    def columns
      @columns ||= Person.connection.columns('delete_me')
    end

    def index(name)
      indexes.detect {|i| i.name == name.to_s }
    end

    def indexes
      @indexes ||= Person.connection.indexes('delete_me')
    end
  end # AlterTableMigrationsTest

end

class CopyMigrationsTest < ActiveRecord::TestCase
  def setup
  end

  def clear
    ActiveRecord::Base.timestamped_migrations = true
    to_delete = Dir[@migrations_path + "/*.rb"] - @existing_migrations
    File.delete(*to_delete)
  end

  def test_copying_migrations_without_timestamps
    ActiveRecord::Base.timestamped_migrations = false
    @migrations_path = MIGRATIONS_ROOT + "/valid"
    @existing_migrations = Dir[@migrations_path + "/*.rb"]

    copied = ActiveRecord::Migration.copy(@migrations_path, {:bukkits => MIGRATIONS_ROOT + "/to_copy"})
    assert File.exists?(@migrations_path + "/4_people_have_hobbies.bukkits.rb")
    assert File.exists?(@migrations_path + "/5_people_have_descriptions.bukkits.rb")
    assert_equal [@migrations_path + "/4_people_have_hobbies.bukkits.rb", @migrations_path + "/5_people_have_descriptions.bukkits.rb"], copied.map(&:filename)

    expected = "# This migration comes from bukkits (originally 1)"
    assert_equal expected, IO.readlines(@migrations_path + "/4_people_have_hobbies.bukkits.rb")[0].chomp

    files_count = Dir[@migrations_path + "/*.rb"].length
    copied = ActiveRecord::Migration.copy(@migrations_path, {:bukkits => MIGRATIONS_ROOT + "/to_copy"})
    assert_equal files_count, Dir[@migrations_path + "/*.rb"].length
    assert copied.empty?
  ensure
    clear
  end

  def test_copying_migrations_without_timestamps_from_2_sources
    ActiveRecord::Base.timestamped_migrations = false
    @migrations_path = MIGRATIONS_ROOT + "/valid"
    @existing_migrations = Dir[@migrations_path + "/*.rb"]

    sources = {}
    sources[:bukkits] = MIGRATIONS_ROOT + "/to_copy"
    sources[:omg] = MIGRATIONS_ROOT + "/to_copy2"
    ActiveRecord::Migration.copy(@migrations_path, sources)
    assert File.exists?(@migrations_path + "/4_people_have_hobbies.bukkits.rb")
    assert File.exists?(@migrations_path + "/5_people_have_descriptions.bukkits.rb")
    assert File.exists?(@migrations_path + "/6_create_articles.omg.rb")
    assert File.exists?(@migrations_path + "/7_create_comments.omg.rb")

    files_count = Dir[@migrations_path + "/*.rb"].length
    ActiveRecord::Migration.copy(@migrations_path, sources)
    assert_equal files_count, Dir[@migrations_path + "/*.rb"].length
  ensure
    clear
  end

  def test_copying_migrations_with_timestamps
    @migrations_path = MIGRATIONS_ROOT + "/valid_with_timestamps"
    @existing_migrations = Dir[@migrations_path + "/*.rb"]

    Time.travel_to(Time.utc(2010, 7, 26, 10, 10, 10)) do
      copied = ActiveRecord::Migration.copy(@migrations_path, {:bukkits => MIGRATIONS_ROOT + "/to_copy_with_timestamps"})
      assert File.exists?(@migrations_path + "/20100726101010_people_have_hobbies.bukkits.rb")
      assert File.exists?(@migrations_path + "/20100726101011_people_have_descriptions.bukkits.rb")
      expected = [@migrations_path + "/20100726101010_people_have_hobbies.bukkits.rb",
                  @migrations_path + "/20100726101011_people_have_descriptions.bukkits.rb"]
      assert_equal expected, copied.map(&:filename)

      files_count = Dir[@migrations_path + "/*.rb"].length
      copied = ActiveRecord::Migration.copy(@migrations_path, {:bukkits => MIGRATIONS_ROOT + "/to_copy_with_timestamps"})
      assert_equal files_count, Dir[@migrations_path + "/*.rb"].length
      assert copied.empty?
    end
  ensure
    clear
  end

  def test_copying_migrations_with_timestamps_from_2_sources
    @migrations_path = MIGRATIONS_ROOT + "/valid_with_timestamps"
    @existing_migrations = Dir[@migrations_path + "/*.rb"]

    sources = {}
    sources[:bukkits] = MIGRATIONS_ROOT + "/to_copy_with_timestamps"
    sources[:omg]     = MIGRATIONS_ROOT + "/to_copy_with_timestamps2"

    Time.travel_to(Time.utc(2010, 7, 26, 10, 10, 10)) do
      copied = ActiveRecord::Migration.copy(@migrations_path, sources)
      assert File.exists?(@migrations_path + "/20100726101010_people_have_hobbies.bukkits.rb")
      assert File.exists?(@migrations_path + "/20100726101011_people_have_descriptions.bukkits.rb")
      assert File.exists?(@migrations_path + "/20100726101012_create_articles.omg.rb")
      assert File.exists?(@migrations_path + "/20100726101013_create_comments.omg.rb")
      assert_equal 4, copied.length

      files_count = Dir[@migrations_path + "/*.rb"].length
      ActiveRecord::Migration.copy(@migrations_path, sources)
      assert_equal files_count, Dir[@migrations_path + "/*.rb"].length
    end
  ensure
    clear
  end

  def test_copying_migrations_with_timestamps_to_destination_with_timestamps_in_future
    @migrations_path = MIGRATIONS_ROOT + "/valid_with_timestamps"
    @existing_migrations = Dir[@migrations_path + "/*.rb"]

    Time.travel_to(Time.utc(2010, 2, 20, 10, 10, 10)) do
      ActiveRecord::Migration.copy(@migrations_path, {:bukkits => MIGRATIONS_ROOT + "/to_copy_with_timestamps"})
      assert File.exists?(@migrations_path + "/20100301010102_people_have_hobbies.bukkits.rb")
      assert File.exists?(@migrations_path + "/20100301010103_people_have_descriptions.bukkits.rb")

      files_count = Dir[@migrations_path + "/*.rb"].length
      copied = ActiveRecord::Migration.copy(@migrations_path, {:bukkits => MIGRATIONS_ROOT + "/to_copy_with_timestamps"})
      assert_equal files_count, Dir[@migrations_path + "/*.rb"].length
      assert copied.empty?
    end
  ensure
    clear
  end

  def test_skipping_migrations
    @migrations_path = MIGRATIONS_ROOT + "/valid_with_timestamps"
    @existing_migrations = Dir[@migrations_path + "/*.rb"]

    sources = {}
    sources[:bukkits] = MIGRATIONS_ROOT + "/to_copy_with_timestamps"
    sources[:omg]     = MIGRATIONS_ROOT + "/to_copy_with_name_collision"

    skipped = []
    on_skip = Proc.new { |name, migration| skipped << "#{name} #{migration.name}" }
    copied = ActiveRecord::Migration.copy(@migrations_path, sources, :on_skip => on_skip)
    assert_equal 2, copied.length

    assert_equal 1, skipped.length
    assert_equal ["omg PeopleHaveHobbies"], skipped
  ensure
    clear
  end

  def test_skip_is_not_called_if_migrations_are_from_the_same_plugin
    @migrations_path = MIGRATIONS_ROOT + "/valid_with_timestamps"
    @existing_migrations = Dir[@migrations_path + "/*.rb"]

    sources = {}
    sources[:bukkits] = MIGRATIONS_ROOT + "/to_copy_with_timestamps"

    skipped = []
    on_skip = Proc.new { |name, migration| skipped << "#{name} #{migration.name}" }
    copied = ActiveRecord::Migration.copy(@migrations_path, sources, :on_skip => on_skip)
    ActiveRecord::Migration.copy(@migrations_path, sources, :on_skip => on_skip)

    assert_equal 2, copied.length
    assert_equal 0, skipped.length
  ensure
    clear
  end

  def test_copying_migrations_to_non_existing_directory
    @migrations_path = MIGRATIONS_ROOT + "/non_existing"
    @existing_migrations = []

    Time.travel_to(Time.utc(2010, 7, 26, 10, 10, 10)) do
      copied = ActiveRecord::Migration.copy(@migrations_path, {:bukkits => MIGRATIONS_ROOT + "/to_copy_with_timestamps"})
      assert File.exists?(@migrations_path + "/20100726101010_people_have_hobbies.bukkits.rb")
      assert File.exists?(@migrations_path + "/20100726101011_people_have_descriptions.bukkits.rb")
      assert_equal 2, copied.length
    end
  ensure
    clear
    Dir.delete(@migrations_path)
  end

  def test_copying_migrations_to_empty_directory
    @migrations_path = MIGRATIONS_ROOT + "/empty"
    @existing_migrations = []

    Time.travel_to(Time.utc(2010, 7, 26, 10, 10, 10)) do
      copied = ActiveRecord::Migration.copy(@migrations_path, {:bukkits => MIGRATIONS_ROOT + "/to_copy_with_timestamps"})
      assert File.exists?(@migrations_path + "/20100726101010_people_have_hobbies.bukkits.rb")
      assert File.exists?(@migrations_path + "/20100726101011_people_have_descriptions.bukkits.rb")
      assert_equal 2, copied.length
    end
  ensure
    clear
  end
end