aboutsummaryrefslogtreecommitdiffstats
path: root/activerecord/test/cases/migration_test.rb
blob: 6fe3b012819c4cdbac2dabf1a032264985c00d24 (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
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
require "cases/helper"
require 'bigdecimal/util'

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

require MIGRATIONS_ROOT + "/valid/1_people_have_last_names"
require MIGRATIONS_ROOT + "/valid/2_we_need_reminders"
require MIGRATIONS_ROOT + "/decimal/1_give_me_big_numbers"
require MIGRATIONS_ROOT + "/interleaved/pass_3/2_i_raise_on_down"

if ActiveRecord::Base.connection.supports_migrations?
  class BigNumber < ActiveRecord::Base; end

  class Reminder < ActiveRecord::Base; end

  class ActiveRecord::Migration
    class <<self
      attr_accessor :message_count
      def puts(text="")
        self.message_count ||= 0
        self.message_count += 1
      end
    end
  end

  class MigrationTableAndIndexTest < ActiveRecord::TestCase
    def test_add_schema_info_respects_prefix_and_suffix
      conn = ActiveRecord::Base.connection

      conn.drop_table(ActiveRecord::Migrator.schema_migrations_table_name) if conn.table_exists?(ActiveRecord::Migrator.schema_migrations_table_name)
      # Use shorter prefix and suffix as in Oracle database identifier cannot be larger than 30 characters
      ActiveRecord::Base.table_name_prefix = 'p_'
      ActiveRecord::Base.table_name_suffix = '_s'
      conn.drop_table(ActiveRecord::Migrator.schema_migrations_table_name) if conn.table_exists?(ActiveRecord::Migrator.schema_migrations_table_name)

      conn.initialize_schema_migrations_table

      assert_equal "p_unique_schema_migrations_s", conn.indexes(ActiveRecord::Migrator.schema_migrations_table_name)[0][:name]
    ensure
      ActiveRecord::Base.table_name_prefix = ""
      ActiveRecord::Base.table_name_suffix = ""
    end
  end

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

    fixtures :people

    def setup
      ActiveRecord::Migration.verbose = true
      PeopleHaveLastNames.message_count = 0
    end

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

      %w(reminders people_reminders prefix_reminders_suffix).each do |table|
        Reminder.connection.drop_table(table) rescue nil
      end
      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_add_index
      # Limit size of last_name and key columns to support Firebird index limitations
      Person.connection.add_column "people", "last_name", :string, :limit => 100
      Person.connection.add_column "people", "key", :string, :limit => 100
      Person.connection.add_column "people", "administrator", :boolean

      assert_nothing_raised { Person.connection.add_index("people", "last_name") }
      assert_nothing_raised { Person.connection.remove_index("people", "last_name") }

      # Orcl nds shrt indx nms.  Sybs 2.
      # OpenBase does not have named indexes.  You must specify a single column name
      unless current_adapter?(:SybaseAdapter, :OpenBaseAdapter)
        assert_nothing_raised { Person.connection.add_index("people", ["last_name", "first_name"]) }
        assert_nothing_raised { Person.connection.remove_index("people", :column => ["last_name", "first_name"]) }
        # Oracle adapter cannot have specified index name larger than 30 characters
        # Oracle adapter is shortening index name when just column list is given
        unless current_adapter?(:OracleAdapter)
          assert_nothing_raised { Person.connection.add_index("people", ["last_name", "first_name"]) }
          assert_nothing_raised { Person.connection.remove_index("people", :name => "index_people_on_last_name_and_first_name") }
          assert_nothing_raised { Person.connection.add_index("people", ["last_name", "first_name"]) }
          assert_nothing_raised { Person.connection.remove_index("people", "last_name_and_first_name") }
        end
        assert_nothing_raised { Person.connection.add_index("people", ["last_name", "first_name"]) }
        assert_nothing_raised { Person.connection.remove_index("people", ["last_name", "first_name"]) }
        assert_nothing_raised { Person.connection.add_index("people", ["last_name"], :length => 10) }
        assert_nothing_raised { Person.connection.remove_index("people", "last_name") }
        assert_nothing_raised { Person.connection.add_index("people", ["last_name"], :length => {:last_name => 10}) }
        assert_nothing_raised { Person.connection.remove_index("people", ["last_name"]) }
        assert_nothing_raised { Person.connection.add_index("people", ["last_name", "first_name"], :length => 10) }
        assert_nothing_raised { Person.connection.remove_index("people", ["last_name", "first_name"]) }
        assert_nothing_raised { Person.connection.add_index("people", ["last_name", "first_name"], :length => {:last_name => 10, :first_name => 20}) }
        assert_nothing_raised { Person.connection.remove_index("people", ["last_name", "first_name"]) }
      end

      # quoting
      # Note: changed index name from "key" to "key_idx" since "key" is a Firebird reserved word
      # OpenBase does not have named indexes.  You must specify a single column name
      unless current_adapter?(:OpenBaseAdapter)
        Person.update_all "#{Person.connection.quote_column_name 'key'}=#{Person.connection.quote_column_name 'id'}" #some databases (including sqlite2 won't add a unique index if existing data non unique)
        assert_nothing_raised { Person.connection.add_index("people", ["key"], :name => "key_idx", :unique => true) }
        assert_nothing_raised { Person.connection.remove_index("people", :name => "key_idx", :unique => true) }
      end

      # Sybase adapter does not support indexes on :boolean columns
      # OpenBase does not have named indexes.  You must specify a single column
      unless current_adapter?(:SybaseAdapter, :OpenBaseAdapter)
        assert_nothing_raised { Person.connection.add_index("people", %w(last_name first_name administrator), :name => "named_admin") }
        assert_nothing_raised { Person.connection.remove_index("people", :name => "named_admin") }
      end
    end

    def test_add_index_length_limit
      good_index_name = 'x' * Person.connection.index_name_length
      too_long_index_name = good_index_name + 'x'
      assert_nothing_raised { Person.connection.add_index("people", "first_name", :name => too_long_index_name) }
      assert !Person.connection.index_exists?("people", too_long_index_name, false)
      assert_nothing_raised { Person.connection.add_index("people", "first_name", :name => good_index_name) }
      assert Person.connection.index_exists?("people", good_index_name, false)
    end

    def test_remove_nonexistent_index
      # we do this by name, so OpenBase is a wash as noted above
      unless current_adapter?(:OpenBaseAdapter)
        assert_nothing_raised { Person.connection.remove_index("people", "no_such_index") }
      end
    end

    def test_rename_index
      unless current_adapter?(:OpenBaseAdapter)
        # keep the names short to make Oracle and similar behave
        Person.connection.add_index('people', [:first_name], :name => 'old_idx')
        assert_nothing_raised { Person.connection.rename_index('people', 'old_idx', 'new_idx') }
        # if the adapter doesn't support the indexes call, pick defaults that let the test pass
        assert !Person.connection.index_exists?('people', 'old_idx', false)
        assert Person.connection.index_exists?('people', 'new_idx', true)
      end
    end

    def test_double_add_index
      unless current_adapter?(:OpenBaseAdapter)
        Person.connection.add_index('people', [:first_name], :name => 'some_idx')
        assert_nothing_raised { Person.connection.add_index('people', [:first_name], :name => 'some_idx') }
      end
    end

    def testing_table_with_only_foo_attribute
      Person.connection.create_table :testings, :id => false do |t|
        t.column :foo, :string
      end

      yield Person.connection
    ensure
      Person.connection.drop_table :testings rescue nil
    end
    protected :testing_table_with_only_foo_attribute

    def test_create_table_without_id
      testing_table_with_only_foo_attribute do |connection|
        assert_equal connection.columns(:testings).size, 1
      end
    end

    def test_add_column_with_primary_key_attribute
      testing_table_with_only_foo_attribute do |connection|
        assert_nothing_raised { connection.add_column :testings, :id, :primary_key }
        assert_equal connection.columns(:testings).size, 2
      end
    end

    def test_create_table_adds_id
      Person.connection.create_table :testings do |t|
        t.column :foo, :string
      end

      assert_equal %w(foo id),
        Person.connection.columns(:testings).map { |c| c.name }.sort
    ensure
      Person.connection.drop_table :testings rescue nil
    end

    def test_create_table_with_not_null_column
      assert_nothing_raised do
        Person.connection.create_table :testings do |t|
          t.column :foo, :string, :null => false
        end
      end

      assert_raise(ActiveRecord::StatementInvalid) do
        Person.connection.execute "insert into testings (foo) values (NULL)"
      end
    ensure
      Person.connection.drop_table :testings rescue nil
    end

    def test_create_table_with_defaults
      # MySQL doesn't allow defaults on TEXT or BLOB columns.
      mysql = current_adapter?(:MysqlAdapter)

      Person.connection.create_table :testings do |t|
        t.column :one, :string, :default => "hello"
        t.column :two, :boolean, :default => true
        t.column :three, :boolean, :default => false
        t.column :four, :integer, :default => 1
        t.column :five, :text, :default => "hello" unless mysql
      end

      columns = Person.connection.columns(:testings)
      one = columns.detect { |c| c.name == "one" }
      two = columns.detect { |c| c.name == "two" }
      three = columns.detect { |c| c.name == "three" }
      four = columns.detect { |c| c.name == "four" }
      five = columns.detect { |c| c.name == "five" } unless mysql

      assert_equal "hello", one.default
      assert_equal true, two.default
      assert_equal false, three.default
      assert_equal 1, four.default
      assert_equal "hello", five.default unless mysql

    ensure
      Person.connection.drop_table :testings rescue nil
    end

    def test_create_table_with_limits
      assert_nothing_raised do
        Person.connection.create_table :testings do |t|
          t.column :foo, :string, :limit => 255

          t.column :default_int, :integer

          t.column :one_int,    :integer, :limit => 1
          t.column :four_int,   :integer, :limit => 4
          t.column :eight_int,  :integer, :limit => 8
          t.column :eleven_int, :integer, :limit => 11
        end
      end

      columns = Person.connection.columns(:testings)
      foo = columns.detect { |c| c.name == "foo" }
      assert_equal 255, foo.limit

      default = columns.detect { |c| c.name == "default_int" }
      one     = columns.detect { |c| c.name == "one_int"     }
      four    = columns.detect { |c| c.name == "four_int"    }
      eight   = columns.detect { |c| c.name == "eight_int"   }
      eleven  = columns.detect { |c| c.name == "eleven_int"   }

      if current_adapter?(:PostgreSQLAdapter)
        assert_equal 'integer', default.sql_type
        assert_equal 'smallint', one.sql_type
        assert_equal 'integer', four.sql_type
        assert_equal 'bigint', eight.sql_type
        assert_equal 'integer', eleven.sql_type
      elsif current_adapter?(:MysqlAdapter)
        assert_match 'int(11)', default.sql_type
        assert_match 'tinyint', one.sql_type
        assert_match 'int', four.sql_type
        assert_match 'bigint', eight.sql_type
        assert_match 'int(11)', eleven.sql_type
      elsif current_adapter?(:OracleAdapter)
        assert_equal 'NUMBER(38)', default.sql_type
        assert_equal 'NUMBER(1)', one.sql_type
        assert_equal 'NUMBER(4)', four.sql_type
        assert_equal 'NUMBER(8)', eight.sql_type
      end
    ensure
      Person.connection.drop_table :testings rescue nil
    end

    def test_create_table_with_primary_key_prefix_as_table_name_with_underscore
      ActiveRecord::Base.primary_key_prefix_type = :table_name_with_underscore

      Person.connection.create_table :testings do |t|
          t.column :foo, :string
      end

      assert_equal %w(foo testing_id), Person.connection.columns(:testings).map { |c| c.name }.sort
    ensure
      Person.connection.drop_table :testings rescue nil
      ActiveRecord::Base.primary_key_prefix_type = nil
    end

    def test_create_table_with_primary_key_prefix_as_table_name
      ActiveRecord::Base.primary_key_prefix_type = :table_name

      Person.connection.create_table :testings do |t|
          t.column :foo, :string
      end

      assert_equal %w(foo testingid), Person.connection.columns(:testings).map { |c| c.name }.sort
    ensure
      Person.connection.drop_table :testings rescue nil
      ActiveRecord::Base.primary_key_prefix_type = nil
    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
      temp_conn.expects(:drop_table).never
      temp_conn.create_table :testings2, :force => true do |t|
        t.column :foo, :string
      end
    ensure
      Person.connection.drop_table :testings2 rescue nil
    end

    def test_create_table_with_timestamps_should_create_datetime_columns
      table_name = :testings

      Person.connection.create_table table_name do |t|
        t.timestamps
      end
      created_columns = Person.connection.columns(table_name)

      created_at_column = created_columns.detect {|c| c.name == 'created_at' }
      updated_at_column = created_columns.detect {|c| c.name == 'updated_at' }

      assert created_at_column.null
      assert updated_at_column.null
    ensure
      Person.connection.drop_table table_name rescue nil
    end

    def test_create_table_with_timestamps_should_create_datetime_columns_with_options
      table_name = :testings

      Person.connection.create_table table_name do |t|
        t.timestamps :null => false
      end
      created_columns = Person.connection.columns(table_name)

      created_at_column = created_columns.detect {|c| c.name == 'created_at' }
      updated_at_column = created_columns.detect {|c| c.name == 'updated_at' }

      assert !created_at_column.null
      assert !updated_at_column.null
    ensure
      Person.connection.drop_table table_name rescue nil
    end

    def test_create_table_without_a_block
      table_name = :testings
      Person.connection.create_table table_name
    ensure
      Person.connection.drop_table table_name rescue nil
    end

    # Sybase, and SQLite3 will not allow you to add a NOT NULL
    # column to a table without a default value.
    unless current_adapter?(:SybaseAdapter, :SQLiteAdapter)
      def test_add_column_not_null_without_default
        Person.connection.create_table :testings do |t|
          t.column :foo, :string
        end
        Person.connection.add_column :testings, :bar, :string, :null => false

        assert_raise(ActiveRecord::StatementInvalid) do
          Person.connection.execute "insert into testings (foo, bar) values ('hello', NULL)"
        end
      ensure
        Person.connection.drop_table :testings rescue nil
      end
    end

    def test_add_column_not_null_with_default
      Person.connection.create_table :testings do |t|
        t.column :foo, :string
      end

      con = Person.connection
      Person.connection.enable_identity_insert("testings", true) if current_adapter?(:SybaseAdapter)
      Person.connection.execute "insert into testings (#{con.quote_column_name('id')}, #{con.quote_column_name('foo')}) values (1, 'hello')"
      Person.connection.enable_identity_insert("testings", false) if current_adapter?(:SybaseAdapter)
      assert_nothing_raised {Person.connection.add_column :testings, :bar, :string, :null => false, :default => "default" }

      assert_raise(ActiveRecord::StatementInvalid) do
        unless current_adapter?(:OpenBaseAdapter)
          Person.connection.execute "insert into testings (#{con.quote_column_name('id')}, #{con.quote_column_name('foo')}, #{con.quote_column_name('bar')}) values (2, 'hello', NULL)"
        else
          Person.connection.insert("INSERT INTO testings (#{con.quote_column_name('id')}, #{con.quote_column_name('foo')}, #{con.quote_column_name('bar')}) VALUES (2, 'hello', NULL)",
            "Testing Insert","id",2)
        end
      end
    ensure
      Person.connection.drop_table :testings rescue nil
    end

    # We specifically do a manual INSERT here, and then test only the SELECT
    # functionality. This allows us to more easily catch INSERT being broken,
    # but SELECT actually working fine.
    def test_native_decimal_insert_manual_vs_automatic
      correct_value = '0012345678901234567890.0123456789'.to_d

      Person.delete_all
      Person.connection.add_column "people", "wealth", :decimal, :precision => '30', :scale => '10'
      Person.reset_column_information

      # Do a manual insertion
      if current_adapter?(:OracleAdapter)
        Person.connection.execute "insert into people (id, wealth) values (people_seq.nextval, 12345678901234567890.0123456789)"
      elsif current_adapter?(:OpenBaseAdapter) || (current_adapter?(:MysqlAdapter) && Mysql.client_version < 50003) #before mysql 5.0.3 decimals stored as strings
        Person.connection.execute "insert into people (wealth) values ('12345678901234567890.0123456789')"
      else
        Person.connection.execute "insert into people (wealth) values (12345678901234567890.0123456789)"
      end

      # SELECT
      row = Person.find(:first)
      assert_kind_of BigDecimal, row.wealth

      # If this assert fails, that means the SELECT is broken!
      unless current_adapter?(:SQLite3Adapter)
        assert_equal correct_value, row.wealth
      end

      # Reset to old state
      Person.delete_all

      # Now use the Rails insertion
      assert_nothing_raised { Person.create :wealth => BigDecimal.new("12345678901234567890.0123456789") }

      # SELECT
      row = Person.find(:first)
      assert_kind_of BigDecimal, row.wealth

      # If these asserts fail, that means the INSERT (create function, or cast to SQL) is broken!
      unless current_adapter?(:SQLite3Adapter)
        assert_equal correct_value, row.wealth
      end

      # Reset to old state
      Person.connection.del_column "people", "wealth" rescue nil
      Person.reset_column_information
    end

    def test_add_column_with_precision_and_scale
      Person.connection.add_column 'people', 'wealth', :decimal, :precision => 9, :scale => 7
      Person.reset_column_information

      wealth_column = Person.columns_hash['wealth']
      assert_equal 9, wealth_column.precision
      assert_equal 7, wealth_column.scale
    end

    def test_native_types
      Person.delete_all
      Person.connection.add_column "people", "last_name", :string
      Person.connection.add_column "people", "bio", :text
      Person.connection.add_column "people", "age", :integer
      Person.connection.add_column "people", "height", :float
      Person.connection.add_column "people", "wealth", :decimal, :precision => '30', :scale => '10'
      Person.connection.add_column "people", "birthday", :datetime
      Person.connection.add_column "people", "favorite_day", :date
      Person.connection.add_column "people", "moment_of_truth", :datetime
      Person.connection.add_column "people", "male", :boolean
      Person.reset_column_information

      assert_nothing_raised do
        Person.create :first_name => 'bob', :last_name => 'bobsen',
          :bio => "I was born ....", :age => 18, :height => 1.78,
          :wealth => BigDecimal.new("12345678901234567890.0123456789"),
          :birthday => 18.years.ago, :favorite_day => 10.days.ago,
          :moment_of_truth => "1782-10-10 21:40:18", :male => true
      end

      bob = Person.find(:first)
      assert_equal 'bob', bob.first_name
      assert_equal 'bobsen', bob.last_name
      assert_equal "I was born ....", bob.bio
      assert_equal 18, bob.age

      # Test for 30 significent digits (beyond the 16 of float), 10 of them
      # after the decimal place.

      unless current_adapter?(:SQLite3Adapter)
        assert_equal BigDecimal.new("0012345678901234567890.0123456789"), bob.wealth
      end

      assert_equal true, bob.male?

      assert_equal String, bob.first_name.class
      assert_equal String, bob.last_name.class
      assert_equal String, bob.bio.class
      assert_equal Fixnum, bob.age.class
      assert_equal Time, bob.birthday.class

      if current_adapter?(:OracleAdapter, :SybaseAdapter)
        # Sybase, and Oracle don't differentiate between date/time
        assert_equal Time, bob.favorite_day.class
      else
        assert_equal Date, bob.favorite_day.class
      end

      # Oracle adapter stores Time or DateTime with timezone value already in _before_type_cast column
      # therefore no timezone change is done afterwards when default timezone is changed
      unless current_adapter?(:OracleAdapter)
        # Test DateTime column and defaults, including timezone.
        # FIXME: moment of truth may be Time on 64-bit platforms.
        if bob.moment_of_truth.is_a?(DateTime)

          with_env_tz 'US/Eastern' do
            assert_equal DateTime.local_offset, bob.moment_of_truth.offset
            assert_not_equal 0, bob.moment_of_truth.offset
            assert_not_equal "Z", bob.moment_of_truth.zone
            # US/Eastern is -5 hours from GMT
            assert_equal Rational(-5, 24), bob.moment_of_truth.offset
            assert_match(/\A-05:?00\Z/, bob.moment_of_truth.zone) #ruby 1.8.6 uses HH:MM, prior versions use HHMM
            assert_equal DateTime::ITALY, bob.moment_of_truth.start
          end
        end
      end

      assert_instance_of TrueClass, bob.male?
      assert_kind_of BigDecimal, bob.wealth
    end

    if current_adapter?(:MysqlAdapter)
      def test_unabstracted_database_dependent_types
        Person.delete_all

        ActiveRecord::Migration.add_column :people, :intelligence_quotient, :tinyint
        Person.reset_column_information
        assert_match(/tinyint/, Person.columns_hash['intelligence_quotient'].sql_type)
      ensure
        ActiveRecord::Migration.remove_column :people, :intelligence_quotient rescue nil
      end
    end

    def test_add_remove_single_field_using_string_arguments
      assert !Person.column_methods_hash.include?(:last_name)

      ActiveRecord::Migration.add_column 'people', 'last_name', :string

      Person.reset_column_information
      assert Person.column_methods_hash.include?(:last_name)

      ActiveRecord::Migration.remove_column 'people', 'last_name'

      Person.reset_column_information
      assert !Person.column_methods_hash.include?(:last_name)
    end

    def test_add_remove_single_field_using_symbol_arguments
      assert !Person.column_methods_hash.include?(:last_name)

      ActiveRecord::Migration.add_column :people, :last_name, :string

      Person.reset_column_information
      assert Person.column_methods_hash.include?(:last_name)

      ActiveRecord::Migration.remove_column :people, :last_name

      Person.reset_column_information
      assert !Person.column_methods_hash.include?(:last_name)
    end

    if current_adapter?(:MysqlAdapter)
      def testing_table_for_positioning
        Person.connection.create_table :testings, :id => false do |t|
          t.column :first, :integer
          t.column :second, :integer
          t.column :third, :integer
        end

        yield Person.connection
      ensure
        Person.connection.drop_table :testings rescue nil
      end
      protected :testing_table_for_positioning

      def test_column_positioning
        testing_table_for_positioning do |conn|
          assert_equal %w(first second third), conn.columns(:testings).map {|c| c.name }
        end
      end

      def test_add_column_with_positioning
        testing_table_for_positioning do |conn|
          conn.add_column :testings, :new_col, :integer
          assert_equal %w(first second third new_col), conn.columns(:testings).map {|c| c.name }
        end
        testing_table_for_positioning do |conn|
          conn.add_column :testings, :new_col, :integer, :first => true
          assert_equal %w(new_col first second third), conn.columns(:testings).map {|c| c.name }
        end
        testing_table_for_positioning do |conn|
          conn.add_column :testings, :new_col, :integer, :after => :first
          assert_equal %w(first new_col second third), conn.columns(:testings).map {|c| c.name }
        end
      end

      def test_change_column_with_positioning
        testing_table_for_positioning do |conn|
          conn.change_column :testings, :second, :integer, :first => true
          assert_equal %w(second first third), conn.columns(:testings).map {|c| c.name }
        end
        testing_table_for_positioning do |conn|
          conn.change_column :testings, :second, :integer, :after => :third
          assert_equal %w(first third second), conn.columns(:testings).map {|c| c.name }
        end
      end
    end

    def test_add_rename
      Person.delete_all

      begin
        Person.connection.add_column "people", "girlfriend", :string
        Person.reset_column_information
        Person.create :girlfriend => 'bobette'

        Person.connection.rename_column "people", "girlfriend", "exgirlfriend"

        Person.reset_column_information
        bob = Person.find(:first)

        assert_equal "bobette", bob.exgirlfriend
      ensure
        Person.connection.remove_column("people", "girlfriend") rescue nil
        Person.connection.remove_column("people", "exgirlfriend") rescue nil
      end

    end

    def test_rename_column_using_symbol_arguments
      begin
        names_before = Person.find(:all).map(&:first_name)
        Person.connection.rename_column :people, :first_name, :nick_name
        Person.reset_column_information
        assert Person.column_names.include?("nick_name")
        assert_equal names_before, Person.find(:all).map(&:nick_name)
      ensure
        Person.connection.remove_column("people","nick_name")
        Person.connection.add_column("people","first_name", :string)
      end
    end

    def test_rename_column
      begin
        names_before = Person.find(:all).map(&:first_name)
        Person.connection.rename_column "people", "first_name", "nick_name"
        Person.reset_column_information
        assert Person.column_names.include?("nick_name")
        assert_equal names_before, Person.find(:all).map(&:nick_name)
      ensure
        Person.connection.remove_column("people","nick_name")
        Person.connection.add_column("people","first_name", :string)
      end
    end

    def test_rename_column_preserves_default_value_not_null
      begin
        default_before = Developer.connection.columns("developers").find { |c| c.name == "salary" }.default
        assert_equal 70000, default_before
        Developer.connection.rename_column "developers", "salary", "anual_salary"
        Developer.reset_column_information
        assert Developer.column_names.include?("anual_salary")
        default_after = Developer.connection.columns("developers").find { |c| c.name == "anual_salary" }.default
        assert_equal 70000, default_after
      ensure
        Developer.connection.rename_column "developers", "anual_salary", "salary"
        Developer.reset_column_information
      end
    end

    def test_rename_nonexistent_column
      ActiveRecord::Base.connection.create_table(:hats) do |table|
        table.column :hat_name, :string, :default => nil
      end
      exception = if current_adapter?(:PostgreSQLAdapter, :OracleAdapter)
        ActiveRecord::StatementInvalid
      else
        ActiveRecord::ActiveRecordError
      end
      assert_raise(exception) do
        Person.connection.rename_column "hats", "nonexistent", "should_fail"
      end
    ensure
      ActiveRecord::Base.connection.drop_table(:hats)
    end

    def test_rename_column_with_sql_reserved_word
      begin
        assert_nothing_raised { Person.connection.rename_column "people", "first_name", "group" }
        Person.reset_column_information
        assert Person.column_names.include?("group")
      ensure
        Person.connection.remove_column("people", "group") rescue nil
        Person.connection.add_column("people", "first_name", :string) rescue nil
      end
    end

    def test_rename_column_with_an_index
      ActiveRecord::Base.connection.create_table(:hats) do |table|
        table.column :hat_name, :string, :limit => 100
        table.column :hat_size, :integer
      end
      Person.connection.add_index :hats, :hat_name
      assert_nothing_raised do
        Person.connection.rename_column "hats", "hat_name", "name"
      end
    ensure
      ActiveRecord::Base.connection.drop_table(:hats)
    end

    def test_remove_column_with_index
      ActiveRecord::Base.connection.create_table(:hats) do |table|
        table.column :hat_name, :string, :limit => 100
        table.column :hat_size, :integer
      end
      ActiveRecord::Base.connection.add_index "hats", "hat_size"

      assert_nothing_raised { Person.connection.remove_column("hats", "hat_size") }
    ensure
      ActiveRecord::Base.connection.drop_table(:hats)
    end

    def test_remove_column_with_multi_column_index
      ActiveRecord::Base.connection.create_table(:hats) do |table|
        table.column :hat_name, :string, :limit => 100
        table.column :hat_size, :integer
        table.column :hat_style, :string, :limit => 100
      end
      ActiveRecord::Base.connection.add_index "hats", ["hat_style", "hat_size"], :unique => true

      assert_nothing_raised { Person.connection.remove_column("hats", "hat_size") }
    ensure
      ActiveRecord::Base.connection.drop_table(:hats)
    end

    def test_change_type_of_not_null_column
      assert_nothing_raised do
        Topic.connection.change_column "topics", "written_on", :datetime, :null => false
        Topic.reset_column_information

        Topic.connection.change_column "topics", "written_on", :datetime, :null => false
        Topic.reset_column_information
      end
    end

    if current_adapter?(:SQLiteAdapter)
      def test_rename_table_for_sqlite_should_work_with_reserved_words
        begin
          assert_nothing_raised do
            ActiveRecord::Base.connection.rename_table :references, :old_references
            ActiveRecord::Base.connection.create_table :octopuses do |t|
              t.column :url, :string
            end
          end

          assert_nothing_raised { ActiveRecord::Base.connection.rename_table :octopuses, :references }

          # Using explicit id in insert for compatibility across all databases
          con = ActiveRecord::Base.connection
          assert_nothing_raised do
            con.execute "INSERT INTO 'references' (#{con.quote_column_name('id')}, #{con.quote_column_name('url')}) VALUES (1, 'http://rubyonrails.com')"
          end
          assert_equal 'http://rubyonrails.com', ActiveRecord::Base.connection.select_value("SELECT url FROM 'references' WHERE id=1")

        ensure
          ActiveRecord::Base.connection.drop_table :references
          ActiveRecord::Base.connection.rename_table :old_references, :references
        end
      end
    end

    def test_rename_table
      begin
        ActiveRecord::Base.connection.create_table :octopuses do |t|
          t.column :url, :string
        end
        ActiveRecord::Base.connection.rename_table :octopuses, :octopi

        # Using explicit id in insert for compatibility across all databases
        con = ActiveRecord::Base.connection
        con.enable_identity_insert("octopi", true) if current_adapter?(:SybaseAdapter)
        assert_nothing_raised { con.execute "INSERT INTO octopi (#{con.quote_column_name('id')}, #{con.quote_column_name('url')}) VALUES (1, 'http://www.foreverflying.com/octopus-black7.jpg')" }
        con.enable_identity_insert("octopi", false) if current_adapter?(:SybaseAdapter)

        assert_equal 'http://www.foreverflying.com/octopus-black7.jpg', ActiveRecord::Base.connection.select_value("SELECT url FROM octopi WHERE id=1")

      ensure
        ActiveRecord::Base.connection.drop_table :octopuses rescue nil
        ActiveRecord::Base.connection.drop_table :octopi rescue nil
      end
    end

    def test_change_column_nullability
      Person.delete_all
      Person.connection.add_column "people", "funny", :boolean
      Person.reset_column_information
      assert Person.columns_hash["funny"].null, "Column 'funny' must initially allow nulls"
      Person.connection.change_column "people", "funny", :boolean, :null => false, :default => true
      Person.reset_column_information
      assert !Person.columns_hash["funny"].null, "Column 'funny' must *not* allow nulls at this point"
      Person.connection.change_column "people", "funny", :boolean, :null => true
      Person.reset_column_information
      assert Person.columns_hash["funny"].null, "Column 'funny' must allow nulls again at this point"
    end

    def test_rename_table_with_an_index
      begin
        ActiveRecord::Base.connection.create_table :octopuses do |t|
          t.column :url, :string
        end
        ActiveRecord::Base.connection.add_index :octopuses, :url

        ActiveRecord::Base.connection.rename_table :octopuses, :octopi

        # Using explicit id in insert for compatibility across all databases
        con = ActiveRecord::Base.connection
        con.enable_identity_insert("octopi", true) if current_adapter?(:SybaseAdapter)
        assert_nothing_raised { con.execute "INSERT INTO octopi (#{con.quote_column_name('id')}, #{con.quote_column_name('url')}) VALUES (1, 'http://www.foreverflying.com/octopus-black7.jpg')" }
        con.enable_identity_insert("octopi", false) if current_adapter?(:SybaseAdapter)

        assert_equal 'http://www.foreverflying.com/octopus-black7.jpg', ActiveRecord::Base.connection.select_value("SELECT url FROM octopi WHERE id=1")
        assert ActiveRecord::Base.connection.indexes(:octopi).first.columns.include?("url")
      ensure
        ActiveRecord::Base.connection.drop_table :octopuses rescue nil
        ActiveRecord::Base.connection.drop_table :octopi rescue nil
      end
    end

    def test_change_column
      Person.connection.add_column 'people', 'age', :integer
      label = "test_change_column Columns"
      old_columns = Person.connection.columns(Person.table_name, label)
      assert old_columns.find { |c| c.name == 'age' and c.type == :integer }

      assert_nothing_raised { Person.connection.change_column "people", "age", :string }

      new_columns = Person.connection.columns(Person.table_name, label)
      assert_nil new_columns.find { |c| c.name == 'age' and c.type == :integer }
      assert new_columns.find { |c| c.name == 'age' and c.type == :string }

      old_columns = Topic.connection.columns(Topic.table_name, label)
      assert old_columns.find { |c| c.name == 'approved' and c.type == :boolean and c.default == true }
      assert_nothing_raised { Topic.connection.change_column :topics, :approved, :boolean, :default => false }
      new_columns = Topic.connection.columns(Topic.table_name, label)
      assert_nil new_columns.find { |c| c.name == 'approved' and c.type == :boolean and c.default == true }
      assert new_columns.find { |c| c.name == 'approved' and c.type == :boolean and c.default == false }
      assert_nothing_raised { Topic.connection.change_column :topics, :approved, :boolean, :default => true }
    end

    def test_change_column_with_nil_default
      Person.connection.add_column "people", "contributor", :boolean, :default => true
      Person.reset_column_information
      assert Person.new.contributor?

      assert_nothing_raised { Person.connection.change_column "people", "contributor", :boolean, :default => nil }
      Person.reset_column_information
      assert !Person.new.contributor?
      assert_nil Person.new.contributor
    ensure
      Person.connection.remove_column("people", "contributor") rescue nil
    end

    def test_change_column_with_new_default
      Person.connection.add_column "people", "administrator", :boolean, :default => true
      Person.reset_column_information
      assert Person.new.administrator?

      assert_nothing_raised { Person.connection.change_column "people", "administrator", :boolean, :default => false }
      Person.reset_column_information
      assert !Person.new.administrator?
    ensure
      Person.connection.remove_column("people", "administrator") rescue nil
    end

    def test_change_column_default
      Person.connection.change_column_default "people", "first_name", "Tester"
      Person.reset_column_information
      assert_equal "Tester", Person.new.first_name
    end

    def test_change_column_quotes_column_names
      Person.connection.create_table :testings do |t|
        t.column :select, :string
      end

      assert_nothing_raised { Person.connection.change_column :testings, :select, :string, :limit => 10 }

      # Oracle needs primary key value from sequence
      if current_adapter?(:OracleAdapter)
        assert_nothing_raised { Person.connection.execute "insert into testings (id, #{Person.connection.quote_column_name('select')}) values (testings_seq.nextval, '7 chars')" }
      else
        assert_nothing_raised { Person.connection.execute "insert into testings (#{Person.connection.quote_column_name('select')}) values ('7 chars')" }
      end
    ensure
      Person.connection.drop_table :testings rescue nil
    end

    def test_keeping_default_and_notnull_constaint_on_change
      Person.connection.create_table :testings do |t|
        t.column :title, :string
      end
      person_klass = Class.new(Person)
      person_klass.set_table_name 'testings'

      person_klass.connection.add_column "testings", "wealth", :integer, :null => false, :default => 99
      person_klass.reset_column_information
      assert_equal 99, person_klass.columns_hash["wealth"].default
      assert_equal false, person_klass.columns_hash["wealth"].null
      # Oracle needs primary key value from sequence
      if current_adapter?(:OracleAdapter)
        assert_nothing_raised {person_klass.connection.execute("insert into testings (id, title) values (testings_seq.nextval, 'tester')")}
      else
        assert_nothing_raised {person_klass.connection.execute("insert into testings (title) values ('tester')")}
      end

      # change column default to see that column doesn't lose its not null definition
      person_klass.connection.change_column_default "testings", "wealth", 100
      person_klass.reset_column_information
      assert_equal 100, person_klass.columns_hash["wealth"].default
      assert_equal false, person_klass.columns_hash["wealth"].null

      # rename column to see that column doesn't lose its not null and/or default definition
      person_klass.connection.rename_column "testings", "wealth", "money"
      person_klass.reset_column_information
      assert_nil person_klass.columns_hash["wealth"]
      assert_equal 100, person_klass.columns_hash["money"].default
      assert_equal false, person_klass.columns_hash["money"].null

      # change column
      person_klass.connection.change_column "testings", "money", :integer, :null => false, :default => 1000
      person_klass.reset_column_information
      assert_equal 1000, person_klass.columns_hash["money"].default
      assert_equal false, person_klass.columns_hash["money"].null

      # change column, make it nullable and clear default
      person_klass.connection.change_column "testings", "money", :integer, :null => true, :default => nil
      person_klass.reset_column_information
      assert_nil person_klass.columns_hash["money"].default
      assert_equal true, person_klass.columns_hash["money"].null

      # change_column_null, make it not nullable and set null values to a default value
      person_klass.connection.execute('UPDATE testings SET money = NULL')
      person_klass.connection.change_column_null "testings", "money", false, 2000
      person_klass.reset_column_information
      assert_nil person_klass.columns_hash["money"].default
      assert_equal false, person_klass.columns_hash["money"].null
      assert_equal [2000], Person.connection.select_values("SELECT money FROM testings").map { |s| s.to_i }.sort
    ensure
      Person.connection.drop_table :testings rescue nil
    end

    def test_change_column_default_to_null
      Person.connection.change_column_default "people", "first_name", nil
      Person.reset_column_information
      assert_nil Person.new.first_name
    end

    def test_add_table
      assert !Reminder.table_exists?

      WeNeedReminders.up

      assert Reminder.create("content" => "hello world", "remind_at" => Time.now)
      assert_equal "hello world", Reminder.find(:first).content

      WeNeedReminders.down
      assert_raise(ActiveRecord::StatementInvalid) { Reminder.find(:first) }
    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.find(: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?(:SQLiteAdapter)
        # - 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.find(:first) }
    end

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

      ActiveRecord::Migrator.up(MIGRATIONS_ROOT + "/valid")

      assert_equal 3, ActiveRecord::Migrator.current_version
      Person.reset_column_information
      assert Person.column_methods_hash.include?(:last_name)
      assert Reminder.create("content" => "hello world", "remind_at" => Time.now)
      assert_equal "hello world", Reminder.find(:first).content

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

      assert_equal 0, ActiveRecord::Migrator.current_version
      Person.reset_column_information
      assert !Person.column_methods_hash.include?(:last_name)
      assert_raise(ActiveRecord::StatementInvalid) { Reminder.find(:first) }
    end

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

      ActiveRecord::Migrator.up(MIGRATIONS_ROOT + "/valid", 1)

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

      ActiveRecord::Migrator.up(MIGRATIONS_ROOT + "/valid", 2)

      assert Reminder.create("content" => "hello world", "remind_at" => Time.now)
      assert_equal "hello world", Reminder.find(:first).content
    end

    def test_migrator_one_down
      ActiveRecord::Migrator.up(MIGRATIONS_ROOT + "/valid")

      ActiveRecord::Migrator.down(MIGRATIONS_ROOT + "/valid", 1)

      Person.reset_column_information
      assert Person.column_methods_hash.include?(:last_name)
      assert !Reminder.table_exists?
    end

    def test_migrator_one_up_one_down
      ActiveRecord::Migrator.up(MIGRATIONS_ROOT + "/valid", 1)
      ActiveRecord::Migrator.down(MIGRATIONS_ROOT + "/valid", 0)

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

    def test_migrator_double_up
      assert_equal(0, ActiveRecord::Migrator.current_version)
      ActiveRecord::Migrator.run(:up, MIGRATIONS_ROOT + "/valid", 1)
      assert_nothing_raised { ActiveRecord::Migrator.run(:up, MIGRATIONS_ROOT + "/valid", 1) }
      assert_equal(1, ActiveRecord::Migrator.current_version)
    end

    def test_migrator_double_down
      assert_equal(0, ActiveRecord::Migrator.current_version)
      ActiveRecord::Migrator.run(:up, MIGRATIONS_ROOT + "/valid", 1)
      ActiveRecord::Migrator.run(:down, MIGRATIONS_ROOT + "/valid", 1)
      assert_nothing_raised { ActiveRecord::Migrator.run(:down, MIGRATIONS_ROOT + "/valid", 1) }
      assert_equal(0, ActiveRecord::Migrator.current_version)
    end

    if ActiveRecord::Base.connection.supports_ddl_transactions?
      def test_migrator_one_up_with_exception_and_rollback
        assert !Person.column_methods_hash.include?(:last_name)

        e = assert_raise(StandardError) do
          ActiveRecord::Migrator.up(MIGRATIONS_ROOT + "/broken", 100)
        end

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

        Person.reset_column_information
        assert !Person.column_methods_hash.include?(:last_name)
      end
    end

    def test_finds_migrations
      migrations = ActiveRecord::Migrator.new(:up, MIGRATIONS_ROOT + "/valid").migrations

      [[1, 'PeopleHaveLastNames'], [2, 'WeNeedReminders'], [3, 'InnocentJointable']].each_with_index do |pair, i|
        assert_equal migrations[i].version, pair.first
        assert_equal migrations[i].name, pair.last
      end
    end

    def test_finds_pending_migrations
      ActiveRecord::Migrator.up(MIGRATIONS_ROOT + "/interleaved/pass_2", 1)
      migrations = ActiveRecord::Migrator.new(:up, MIGRATIONS_ROOT + "/interleaved/pass_2").pending_migrations

      assert_equal 1, migrations.size
      assert_equal migrations[0].version, 3
      assert_equal migrations[0].name, 'InnocentJointable'
    end

    def test_relative_migrations
      $".delete_if do |fname|
        fname == (MIGRATIONS_ROOT + "/valid/1_people_have_last_names.rb")
      end
      Object.send(:remove_const, :PeopleHaveLastNames)

      Dir.chdir(MIGRATIONS_ROOT) do
        ActiveRecord::Migrator.up("valid/", 1)
      end

      assert defined?(PeopleHaveLastNames)
    end

    def test_only_loads_pending_migrations
      # migrate up to 1
      ActiveRecord::Migrator.up(MIGRATIONS_ROOT + "/valid", 1)

      # now unload the migrations that have been defined
      Object.send(:remove_const, :PeopleHaveLastNames)

      ActiveRecord::Migrator.migrate(MIGRATIONS_ROOT + "/valid", nil)

      assert !defined? PeopleHaveLastNames

      %w(WeNeedReminders, InnocentJointable).each do |migration|
        assert defined? migration
      end

    ensure
      load(MIGRATIONS_ROOT + "/valid/1_people_have_last_names.rb")
    end

    def test_target_version_zero_should_run_only_once
      # migrate up to 1
      ActiveRecord::Migrator.migrate(MIGRATIONS_ROOT + "/valid", 1)

      # migrate down to 0
      ActiveRecord::Migrator.migrate(MIGRATIONS_ROOT + "/valid", 0)

      # now unload the migrations that have been defined
      PeopleHaveLastNames.unloadable
      ActiveSupport::Dependencies.remove_unloadable_constants!

      # migrate down to 0 again
      ActiveRecord::Migrator.migrate(MIGRATIONS_ROOT + "/valid", 0)

      assert !defined? PeopleHaveLastNames
    ensure
      load(MIGRATIONS_ROOT + "/valid/1_people_have_last_names.rb")
    end

    def test_migrator_db_has_no_schema_migrations_table
      # Oracle adapter raises error if semicolon is present as last character
      if current_adapter?(:OracleAdapter)
        ActiveRecord::Base.connection.execute("DROP TABLE schema_migrations")
      else
        ActiveRecord::Base.connection.execute("DROP TABLE schema_migrations;")
      end
      assert_nothing_raised do
        ActiveRecord::Migrator.migrate(MIGRATIONS_ROOT + "/valid", 1)
      end
    end

    def test_migrator_verbosity
      ActiveRecord::Migrator.up(MIGRATIONS_ROOT + "/valid", 1)
      assert PeopleHaveLastNames.message_count > 0
      PeopleHaveLastNames.message_count = 0

      ActiveRecord::Migrator.down(MIGRATIONS_ROOT + "/valid", 0)
      assert PeopleHaveLastNames.message_count > 0
      PeopleHaveLastNames.message_count = 0
    end

    def test_migrator_verbosity_off
      PeopleHaveLastNames.verbose = false
      ActiveRecord::Migrator.up(MIGRATIONS_ROOT + "/valid", 1)
      assert PeopleHaveLastNames.message_count.zero?
      ActiveRecord::Migrator.down(MIGRATIONS_ROOT + "/valid", 0)
      assert PeopleHaveLastNames.message_count.zero?
    end

    def test_migrator_going_down_due_to_version_target
      ActiveRecord::Migrator.up(MIGRATIONS_ROOT + "/valid", 1)
      ActiveRecord::Migrator.migrate(MIGRATIONS_ROOT + "/valid", 0)

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

      ActiveRecord::Migrator.migrate(MIGRATIONS_ROOT + "/valid")

      Person.reset_column_information
      assert Person.column_methods_hash.include?(:last_name)
      assert Reminder.create("content" => "hello world", "remind_at" => Time.now)
      assert_equal "hello world", Reminder.find(:first).content
    end

    def test_migrator_rollback
      ActiveRecord::Migrator.migrate(MIGRATIONS_ROOT + "/valid")
      assert_equal(3, ActiveRecord::Migrator.current_version)

      ActiveRecord::Migrator.rollback(MIGRATIONS_ROOT + "/valid")
      assert_equal(2, ActiveRecord::Migrator.current_version)

      ActiveRecord::Migrator.rollback(MIGRATIONS_ROOT + "/valid")
      assert_equal(1, ActiveRecord::Migrator.current_version)

      ActiveRecord::Migrator.rollback(MIGRATIONS_ROOT + "/valid")
      assert_equal(0, ActiveRecord::Migrator.current_version)

      ActiveRecord::Migrator.rollback(MIGRATIONS_ROOT + "/valid")
      assert_equal(0, ActiveRecord::Migrator.current_version)
    end

    def test_migrator_forward
      ActiveRecord::Migrator.migrate(MIGRATIONS_ROOT + "/valid", 1)
      assert_equal(1, ActiveRecord::Migrator.current_version)

      ActiveRecord::Migrator.forward(MIGRATIONS_ROOT + "/valid", 2)
      assert_equal(3, ActiveRecord::Migrator.current_version)

      ActiveRecord::Migrator.forward(MIGRATIONS_ROOT + "/valid")
      assert_equal(3, ActiveRecord::Migrator.current_version)
    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
    ensure
      ActiveRecord::Base.table_name_prefix = ""
      ActiveRecord::Base.table_name_suffix = ""
    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)
      ActiveRecord::Base.table_name_prefix = ""
      ActiveRecord::Base.table_name_suffix = ""
      Reminder.reset_table_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.find(:first).content

      WeNeedReminders.down
      assert_raise(ActiveRecord::StatementInvalid) { Reminder.find(:first) }
    ensure
      ActiveRecord::Base.table_name_prefix = ''
      ActiveRecord::Base.table_name_suffix = ''
      Reminder.reset_table_name
      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" }

      if current_adapter?(:MysqlAdapter)
        assert_equal '', data_column.default
      else
        assert_nil data_column.default
      end

      Person.connection.drop_table :binary_testings rescue nil
    end

    def test_migrator_with_duplicates
      assert_raise(ActiveRecord::DuplicateMigrationVersionError) do
        ActiveRecord::Migrator.migrate(MIGRATIONS_ROOT + "/duplicate", nil)
      end
    end

    def test_migrator_with_duplicate_names
      assert_raise(ActiveRecord::DuplicateMigrationNameError, "Multiple migrations have the name Chunky") do
        ActiveRecord::Migrator.migrate(MIGRATIONS_ROOT + "/duplicate_names", nil)
      end
    end

    def test_migrator_with_missing_version_numbers
      assert_raise(ActiveRecord::UnknownMigrationVersionError) do
        ActiveRecord::Migrator.migrate(MIGRATIONS_ROOT + "/missing", 500)
      end
    end

    def test_create_table_with_custom_sequence_name
      return 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

    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 SexyMigrationsTest < ActiveRecord::TestCase
    def test_references_column_type_adds_id
      with_new_table do |t|
        t.expects(:column).with('customer_id', :integer, {})
        t.references :customer
      end
    end

    def test_references_column_type_with_polymorphic_adds_type
      with_new_table do |t|
        t.expects(:column).with('taggable_type', :string, {})
        t.expects(:column).with('taggable_id', :integer, {})
        t.references :taggable, :polymorphic => true
      end
    end

    def test_references_column_type_with_polymorphic_and_options_null_is_false_adds_table_flag
      with_new_table do |t|
        t.expects(:column).with('taggable_type', :string, {:null => false})
        t.expects(:column).with('taggable_id', :integer, {:null => false})
        t.references :taggable, :polymorphic => true, :null => false
      end
    end

    def test_belongs_to_works_like_references
      with_new_table do |t|
        t.expects(:column).with('customer_id', :integer, {})
        t.belongs_to :customer
      end
    end

    def test_timestamps_creates_updated_at_and_created_at
      with_new_table do |t|
        t.expects(:column).with(:created_at, :datetime, kind_of(Hash))
        t.expects(:column).with(:updated_at, :datetime, kind_of(Hash))
        t.timestamps
      end
    end

    def test_integer_creates_integer_column
      with_new_table do |t|
        t.expects(:column).with(:foo, 'integer', {})
        t.expects(:column).with(:bar, 'integer', {})
        t.integer :foo, :bar
      end
    end

    def test_string_creates_string_column
      with_new_table do |t|
        t.expects(:column).with(:foo, 'string', {})
        t.expects(:column).with(:bar, 'string', {})
        t.string :foo, :bar
      end
    end

    if current_adapter?(:PostgreSQLAdapter)
      def test_xml_creates_xml_column
        with_new_table do |t|
          t.expects(:column).with(:data, 'xml', {})
          t.xml :data
        end
      end
    end

    protected
    def with_new_table
      Person.connection.create_table :delete_me, :force => true do |t|
        yield t
      end
    ensure
      Person.connection.drop_table :delete_me rescue nil
    end

  end # SexyMigrationsTest

  class MigrationLoggerTest < ActiveRecord::TestCase
    def setup
      Object.send(:remove_const, :InnocentJointable)
    end

    def test_migration_should_be_run_without_logger
      previous_logger = ActiveRecord::Base.logger
      ActiveRecord::Base.logger = nil
      assert_nothing_raised do
        ActiveRecord::Migrator.migrate(MIGRATIONS_ROOT + "/valid")
      end
    ensure
      ActiveRecord::Base.logger = previous_logger
    end
  end

  class InterleavedMigrationsTest < ActiveRecord::TestCase
    def setup
      Object.send(:remove_const, :PeopleHaveLastNames)
    end

    def test_migrator_interleaved_migrations
      ActiveRecord::Migrator.up(MIGRATIONS_ROOT + "/interleaved/pass_1")

      assert_nothing_raised do
        ActiveRecord::Migrator.up(MIGRATIONS_ROOT + "/interleaved/pass_2")
      end

      Person.reset_column_information
      assert Person.column_methods_hash.include?(:last_name)

      Object.send(:remove_const, :PeopleHaveLastNames)
      Object.send(:remove_const, :InnocentJointable)
      assert_nothing_raised do
        ActiveRecord::Migrator.down(MIGRATIONS_ROOT + "/interleaved/pass_3")
      end
    end
  end

  class ChangeTableMigrationsTest < ActiveRecord::TestCase
    def setup
      @connection = Person.connection
      @connection.create_table :delete_me, :force => true do |t|
      end
    end

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

    def test_references_column_type_adds_id
      with_change_table do |t|
        @connection.expects(:add_column).with(:delete_me, 'customer_id', :integer, {})
        t.references :customer
      end
    end

    def test_remove_references_column_type_removes_id
      with_change_table do |t|
        @connection.expects(:remove_column).with(:delete_me, 'customer_id')
        t.remove_references :customer
      end
    end

    def test_add_belongs_to_works_like_add_references
      with_change_table do |t|
        @connection.expects(:add_column).with(:delete_me, 'customer_id', :integer, {})
        t.belongs_to :customer
      end
    end

    def test_remove_belongs_to_works_like_remove_references
      with_change_table do |t|
        @connection.expects(:remove_column).with(:delete_me, 'customer_id')
        t.remove_belongs_to :customer
      end
    end

    def test_references_column_type_with_polymorphic_adds_type
      with_change_table do |t|
        @connection.expects(:add_column).with(:delete_me, 'taggable_type', :string, {})
        @connection.expects(:add_column).with(:delete_me, 'taggable_id', :integer, {})
        t.references :taggable, :polymorphic => true
      end
    end

    def test_remove_references_column_type_with_polymorphic_removes_type
      with_change_table do |t|
        @connection.expects(:remove_column).with(:delete_me, 'taggable_type')
        @connection.expects(:remove_column).with(:delete_me, 'taggable_id')
        t.remove_references :taggable, :polymorphic => true
      end
    end

    def test_references_column_type_with_polymorphic_and_options_null_is_false_adds_table_flag
      with_change_table do |t|
        @connection.expects(:add_column).with(:delete_me, 'taggable_type', :string, {:null => false})
        @connection.expects(:add_column).with(:delete_me, 'taggable_id', :integer, {:null => false})
        t.references :taggable, :polymorphic => true, :null => false
      end
    end

    def test_remove_references_column_type_with_polymorphic_and_options_null_is_false_removes_table_flag
      with_change_table do |t|
        @connection.expects(:remove_column).with(:delete_me, 'taggable_type')
        @connection.expects(:remove_column).with(:delete_me, 'taggable_id')
        t.remove_references :taggable, :polymorphic => true, :null => false
      end
    end

    def test_timestamps_creates_updated_at_and_created_at
      with_change_table do |t|
        @connection.expects(:add_timestamps).with(:delete_me)
        t.timestamps
      end
    end

    def test_remove_timestamps_creates_updated_at_and_created_at
      with_change_table do |t|
        @connection.expects(:remove_timestamps).with(:delete_me)
        t.remove_timestamps
      end
    end

    def string_column
      if current_adapter?(:PostgreSQLAdapter)
        "character varying(255)"
      elsif current_adapter?(:OracleAdapter)
        'VARCHAR2(255)'
      else
        'varchar(255)'
      end
    end

    def integer_column
      if current_adapter?(:MysqlAdapter)
        'int(11)'
      elsif current_adapter?(:OracleAdapter)
        'NUMBER(38)'
      else
        'integer'
      end
    end

    def test_integer_creates_integer_column
      with_change_table do |t|
        @connection.expects(:add_column).with(:delete_me, :foo, integer_column, {})
        @connection.expects(:add_column).with(:delete_me, :bar, integer_column, {})
        t.integer :foo, :bar
      end
    end

    def test_string_creates_string_column
      with_change_table do |t|
        @connection.expects(:add_column).with(:delete_me, :foo, string_column, {})
        @connection.expects(:add_column).with(:delete_me, :bar, string_column, {})
        t.string :foo, :bar
      end
    end

    def test_column_creates_column
      with_change_table do |t|
        @connection.expects(:add_column).with(:delete_me, :bar, :integer, {})
        t.column :bar, :integer
      end
    end

    def test_column_creates_column_with_options
      with_change_table do |t|
        @connection.expects(:add_column).with(:delete_me, :bar, :integer, {:null => false})
        t.column :bar, :integer, :null => false
      end
    end

    def test_index_creates_index
      with_change_table do |t|
        @connection.expects(:add_index).with(:delete_me, :bar, {})
        t.index :bar
      end
    end

    def test_index_creates_index_with_options
      with_change_table do |t|
        @connection.expects(:add_index).with(:delete_me, :bar, {:unique => true})
        t.index :bar, :unique => true
      end
    end

    def test_change_changes_column
      with_change_table do |t|
        @connection.expects(:change_column).with(:delete_me, :bar, :string, {})
        t.change :bar, :string
      end
    end

    def test_change_changes_column_with_options
      with_change_table do |t|
        @connection.expects(:change_column).with(:delete_me, :bar, :string, {:null => true})
        t.change :bar, :string, :null => true
      end
    end

    def test_change_default_changes_column
      with_change_table do |t|
        @connection.expects(:change_column_default).with(:delete_me, :bar, :string)
        t.change_default :bar, :string
      end
    end

    def test_remove_drops_single_column
      with_change_table do |t|
        @connection.expects(:remove_column).with(:delete_me, [:bar])
        t.remove :bar
      end
    end

    def test_remove_drops_multiple_columns
      with_change_table do |t|
        @connection.expects(:remove_column).with(:delete_me, [:bar, :baz])
        t.remove :bar, :baz
      end
    end

    def test_remove_index_removes_index_with_options
      with_change_table do |t|
        @connection.expects(:remove_index).with(:delete_me, {:unique => true})
        t.remove_index :unique => true
      end
    end

    def test_rename_renames_column
      with_change_table do |t|
        @connection.expects(:rename_column).with(:delete_me, :bar, :baz)
        t.rename :bar, :baz
      end
    end

    protected
    def with_change_table
      Person.connection.change_table :delete_me do |t|
        yield t
      end
    end
  end
end