aboutsummaryrefslogtreecommitdiffstats
path: root/activerecord/test/cases/tasks/database_tasks_test.rb
blob: 06f11108f99df84d8b2da699c23e4f2f33ed5da9 (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
# frozen_string_literal: true

require "cases/helper"
require "active_record/tasks/database_tasks"
require "models/author"

module ActiveRecord
  module DatabaseTasksSetupper
    def setup
      @mysql_tasks, @postgresql_tasks, @sqlite_tasks = Array.new(
        3,
        Class.new do
          def create; end
          def drop; end
          def purge; end
          def charset; end
          def collation; end
          def structure_dump(*); end
          def structure_load(*); end
        end.new
      )

      $stdout, @original_stdout = StringIO.new, $stdout
      $stderr, @original_stderr = StringIO.new, $stderr
    end

    def teardown
      $stdout, $stderr = @original_stdout, @original_stderr
    end

    def with_stubbed_new
      ActiveRecord::Tasks::MySQLDatabaseTasks.stub(:new, @mysql_tasks) do
        ActiveRecord::Tasks::PostgreSQLDatabaseTasks.stub(:new, @postgresql_tasks) do
          ActiveRecord::Tasks::SQLiteDatabaseTasks.stub(:new, @sqlite_tasks) do
            yield
          end
        end
      end
    end
  end

  ADAPTERS_TASKS = {
    mysql2:     :mysql_tasks,
    postgresql: :postgresql_tasks,
    sqlite3:    :sqlite_tasks
  }

  class DatabaseTasksUtilsTask < ActiveRecord::TestCase
    def test_raises_an_error_when_called_with_protected_environment
      protected_environments = ActiveRecord::Base.protected_environments
      current_env            = ActiveRecord::Base.connection.migration_context.current_environment

      assert_called_on_instance_of(
        ActiveRecord::MigrationContext,
        :current_version,
        times: 6,
        returns: 1
      ) do
        assert_not_includes protected_environments, current_env
        # Assert no error
        ActiveRecord::Tasks::DatabaseTasks.check_protected_environments!

        ActiveRecord::Base.protected_environments = [current_env]

        assert_raise(ActiveRecord::ProtectedEnvironmentError) do
          ActiveRecord::Tasks::DatabaseTasks.check_protected_environments!
        end
      end
    ensure
      ActiveRecord::Base.protected_environments = protected_environments
    end

    def test_raises_an_error_when_called_with_protected_environment_which_name_is_a_symbol
      protected_environments = ActiveRecord::Base.protected_environments
      current_env            = ActiveRecord::Base.connection.migration_context.current_environment
      assert_called_on_instance_of(
        ActiveRecord::MigrationContext,
        :current_version,
        times: 6,
        returns: 1
      ) do
        assert_not_includes protected_environments, current_env
        # Assert no error
        ActiveRecord::Tasks::DatabaseTasks.check_protected_environments!

        ActiveRecord::Base.protected_environments = [current_env.to_sym]
        assert_raise(ActiveRecord::ProtectedEnvironmentError) do
          ActiveRecord::Tasks::DatabaseTasks.check_protected_environments!
        end
      end
    ensure
      ActiveRecord::Base.protected_environments = protected_environments
    end

    def test_raises_an_error_if_no_migrations_have_been_made
      ActiveRecord::InternalMetadata.stub(:table_exists?, false) do
        assert_called_on_instance_of(
          ActiveRecord::MigrationContext,
          :current_version,
          returns: 1
        ) do
          assert_raise(ActiveRecord::NoEnvironmentInSchemaError) do
            ActiveRecord::Tasks::DatabaseTasks.check_protected_environments!
          end
        end
      end
    end
  end

  class DatabaseTasksRegisterTask < ActiveRecord::TestCase
    def test_register_task
      klazz = Class.new do
        def initialize(*arguments); end
        def structure_dump(filename); end
      end
      instance = klazz.new

      klazz.stub(:new, instance) do
        assert_called_with(instance, :structure_dump, ["awesome-file.sql", nil]) do
          ActiveRecord::Tasks::DatabaseTasks.register_task(/foo/, klazz)
          ActiveRecord::Tasks::DatabaseTasks.structure_dump({ "adapter" => :foo }, "awesome-file.sql")
        end
      end
    end

    def test_unregistered_task
      assert_raise(ActiveRecord::Tasks::DatabaseNotSupported) do
        ActiveRecord::Tasks::DatabaseTasks.structure_dump({ "adapter" => :bar }, "awesome-file.sql")
      end
    end
  end

  class DatabaseTasksCreateTest < ActiveRecord::TestCase
    include DatabaseTasksSetupper

    ADAPTERS_TASKS.each do |k, v|
      define_method("test_#{k}_create") do
        with_stubbed_new do
          assert_called(eval("@#{v}"), :create) do
            ActiveRecord::Tasks::DatabaseTasks.create "adapter" => k
          end
        end
      end
    end
  end

  class DatabaseTasksDumpSchemaCacheTest < ActiveRecord::TestCase
    def test_dump_schema_cache
      path = "/tmp/my_schema_cache.yml"
      ActiveRecord::Tasks::DatabaseTasks.dump_schema_cache(ActiveRecord::Base.connection, path)
      assert File.file?(path)
    ensure
      ActiveRecord::Base.clear_cache!
      FileUtils.rm_rf(path)
    end
  end

  class DatabaseTasksCreateAllTest < ActiveRecord::TestCase
    def setup
      @configurations = { "development" => { "database" => "my-db" } }

      $stdout, @original_stdout = StringIO.new, $stdout
      $stderr, @original_stderr = StringIO.new, $stderr
    end

    def teardown
      $stdout, $stderr = @original_stdout, @original_stderr
    end

    def test_ignores_configurations_without_databases
      @configurations["development"]["database"] = nil

      with_stubbed_configurations_establish_connection do
        assert_not_called(ActiveRecord::Tasks::DatabaseTasks, :create) do
          ActiveRecord::Tasks::DatabaseTasks.create_all
        end
      end
    end

    def test_ignores_remote_databases
      @configurations["development"]["host"] = "my.server.tld"

      with_stubbed_configurations_establish_connection do
        assert_not_called(ActiveRecord::Tasks::DatabaseTasks, :create) do
          ActiveRecord::Tasks::DatabaseTasks.create_all
        end
      end
    end

    def test_warning_for_remote_databases
      @configurations["development"]["host"] = "my.server.tld"

      with_stubbed_configurations_establish_connection do
        ActiveRecord::Tasks::DatabaseTasks.create_all

        assert_match "This task only modifies local databases. my-db is on a remote host.",
          $stderr.string
      end
    end

    def test_creates_configurations_with_local_ip
      @configurations["development"]["host"] = "127.0.0.1"

      with_stubbed_configurations_establish_connection do
        assert_called(ActiveRecord::Tasks::DatabaseTasks, :create) do
          ActiveRecord::Tasks::DatabaseTasks.create_all
        end
      end
    end

    def test_creates_configurations_with_local_host
      @configurations["development"]["host"] = "localhost"

      with_stubbed_configurations_establish_connection do
        assert_called(ActiveRecord::Tasks::DatabaseTasks, :create) do
          ActiveRecord::Tasks::DatabaseTasks.create_all
        end
      end
    end

    def test_creates_configurations_with_blank_hosts
      @configurations["development"]["host"] = nil

      with_stubbed_configurations_establish_connection do
        assert_called(ActiveRecord::Tasks::DatabaseTasks, :create) do
          ActiveRecord::Tasks::DatabaseTasks.create_all
        end
      end
    end

    private
      def with_stubbed_configurations_establish_connection
        old_configurations = ActiveRecord::Base.configurations
        ActiveRecord::Base.configurations = @configurations

        # To refrain from connecting to a newly created empty DB in
        # sqlite3_mem tests
        ActiveRecord::Base.connection_handler.stub(:establish_connection, nil) do
          yield
        end
      ensure
        ActiveRecord::Base.configurations = old_configurations
      end
  end

  class DatabaseTasksCreateCurrentTest < ActiveRecord::TestCase
    def setup
      @configurations = {
        "development" => { "database" => "dev-db" },
        "test"        => { "database" => "test-db" },
        "production"  => { "url" => "abstract://prod-db-host/prod-db" }
      }
    end

    def test_creates_current_environment_database
      with_stubbed_configurations_establish_connection do
        assert_called_with(
          ActiveRecord::Tasks::DatabaseTasks,
          :create,
          ["database" => "test-db"],
        ) do
          ActiveRecord::Tasks::DatabaseTasks.create_current(
            ActiveSupport::StringInquirer.new("test")
          )
        end
      end
    end

    def test_creates_current_environment_database_with_url
      with_stubbed_configurations_establish_connection do
        assert_called_with(
          ActiveRecord::Tasks::DatabaseTasks,
          :create,
          ["adapter" => "abstract", "database" => "prod-db", "host" => "prod-db-host"],
        ) do
          ActiveRecord::Tasks::DatabaseTasks.create_current(
            ActiveSupport::StringInquirer.new("production")
          )
        end
      end
    end

    def test_creates_test_and_development_databases_when_env_was_not_specified
      with_stubbed_configurations_establish_connection do
        assert_called_with(
          ActiveRecord::Tasks::DatabaseTasks,
          :create,
          [
            ["database" => "dev-db"],
            ["database" => "test-db"]
          ],
        ) do
          ActiveRecord::Tasks::DatabaseTasks.create_current(
            ActiveSupport::StringInquirer.new("development")
          )
        end
      end
    end

    def test_creates_test_and_development_databases_when_rails_env_is_development
      old_env = ENV["RAILS_ENV"]
      ENV["RAILS_ENV"] = "development"

      with_stubbed_configurations_establish_connection do
        assert_called_with(
          ActiveRecord::Tasks::DatabaseTasks,
          :create,
          [
            ["database" => "dev-db"],
            ["database" => "test-db"]
          ],
        ) do
          ActiveRecord::Tasks::DatabaseTasks.create_current(
            ActiveSupport::StringInquirer.new("development")
          )
        end
      end
    ensure
      ENV["RAILS_ENV"] = old_env
    end

    def test_establishes_connection_for_the_given_environments
      ActiveRecord::Tasks::DatabaseTasks.stub(:create, nil) do
        assert_called_with(ActiveRecord::Base, :establish_connection, [:development]) do
          ActiveRecord::Tasks::DatabaseTasks.create_current(
            ActiveSupport::StringInquirer.new("development")
          )
        end
      end
    end

    private
      def with_stubbed_configurations_establish_connection
        old_configurations = ActiveRecord::Base.configurations
        ActiveRecord::Base.configurations = @configurations

        ActiveRecord::Base.connection_handler.stub(:establish_connection, nil) do
          yield
        end
      ensure
        ActiveRecord::Base.configurations = old_configurations
      end
  end

  class DatabaseTasksCreateCurrentThreeTierTest < ActiveRecord::TestCase
    def setup
      @configurations = {
        "development" => { "primary" => { "database" => "dev-db" }, "secondary" => { "database" => "secondary-dev-db" } },
        "test" => { "primary" => { "database" => "test-db" }, "secondary" => { "database" => "secondary-test-db" } },
        "production" => { "primary" => { "url" => "abstract://prod-db-host/prod-db" }, "secondary" => { "url" => "abstract://secondary-prod-db-host/secondary-prod-db" } }
      }
    end

    def test_creates_current_environment_database
      with_stubbed_configurations_establish_connection do
        assert_called_with(
          ActiveRecord::Tasks::DatabaseTasks,
          :create,
          [
            ["database" => "test-db"],
            ["database" => "secondary-test-db"]
          ]
        ) do
          ActiveRecord::Tasks::DatabaseTasks.create_current(
            ActiveSupport::StringInquirer.new("test")
          )
        end
      end
    end

    def test_creates_current_environment_database_with_url
      with_stubbed_configurations_establish_connection do
        assert_called_with(
          ActiveRecord::Tasks::DatabaseTasks,
          :create,
          [
            ["adapter" => "abstract", "database" => "prod-db", "host" => "prod-db-host"],
            ["adapter" => "abstract", "database" => "secondary-prod-db", "host" => "secondary-prod-db-host"]
          ]
        ) do
          ActiveRecord::Tasks::DatabaseTasks.create_current(
            ActiveSupport::StringInquirer.new("production")
          )
        end
      end
    end

    def test_creates_test_and_development_databases_when_env_was_not_specified
      with_stubbed_configurations_establish_connection do
        assert_called_with(
          ActiveRecord::Tasks::DatabaseTasks,
          :create,
          [
            ["database" => "dev-db"],
            ["database" => "secondary-dev-db"],
            ["database" => "test-db"],
            ["database" => "secondary-test-db"]
          ]
        ) do
          ActiveRecord::Tasks::DatabaseTasks.create_current(
            ActiveSupport::StringInquirer.new("development")
          )
        end
      end
    end

    def test_creates_test_and_development_databases_when_rails_env_is_development
      old_env = ENV["RAILS_ENV"]
      ENV["RAILS_ENV"] = "development"

      with_stubbed_configurations_establish_connection do
        assert_called_with(
          ActiveRecord::Tasks::DatabaseTasks,
          :create,
          [
            ["database" => "dev-db"],
            ["database" => "secondary-dev-db"],
            ["database" => "test-db"],
            ["database" => "secondary-test-db"]
          ]
        ) do
          ActiveRecord::Tasks::DatabaseTasks.create_current(
            ActiveSupport::StringInquirer.new("development")
          )
        end
      end
    ensure
      ENV["RAILS_ENV"] = old_env
    end

    def test_establishes_connection_for_the_given_environments_config
      ActiveRecord::Tasks::DatabaseTasks.stub(:create, nil) do
        assert_called_with(
          ActiveRecord::Base,
          :establish_connection,
          [:development]
        ) do
          ActiveRecord::Tasks::DatabaseTasks.create_current(
            ActiveSupport::StringInquirer.new("development")
          )
        end
      end
    end

    private
      def with_stubbed_configurations_establish_connection
        old_configurations = ActiveRecord::Base.configurations
        ActiveRecord::Base.configurations = @configurations

        ActiveRecord::Base.connection_handler.stub(:establish_connection, nil) do
          yield
        end
      ensure
        ActiveRecord::Base.configurations = old_configurations
      end
  end

  class DatabaseTasksDropTest < ActiveRecord::TestCase
    include DatabaseTasksSetupper

    ADAPTERS_TASKS.each do |k, v|
      define_method("test_#{k}_drop") do
        with_stubbed_new do
          assert_called(eval("@#{v}"), :drop) do
            ActiveRecord::Tasks::DatabaseTasks.drop "adapter" => k
          end
        end
      end
    end
  end

  class DatabaseTasksDropAllTest < ActiveRecord::TestCase
    def setup
      @configurations = { development: { "database" => "my-db" } }

      $stdout, @original_stdout = StringIO.new, $stdout
      $stderr, @original_stderr = StringIO.new, $stderr
    end

    def teardown
      $stdout, $stderr = @original_stdout, @original_stderr
    end

    def test_ignores_configurations_without_databases
      @configurations[:development]["database"] = nil

      with_stubbed_configurations do
        assert_not_called(ActiveRecord::Tasks::DatabaseTasks, :drop) do
          ActiveRecord::Tasks::DatabaseTasks.drop_all
        end
      end
    end

    def test_ignores_remote_databases
      @configurations[:development]["host"] = "my.server.tld"

      with_stubbed_configurations do
        assert_not_called(ActiveRecord::Tasks::DatabaseTasks, :drop) do
          ActiveRecord::Tasks::DatabaseTasks.drop_all
        end
      end
    end

    def test_warning_for_remote_databases
      @configurations[:development]["host"] = "my.server.tld"

      with_stubbed_configurations do
        ActiveRecord::Tasks::DatabaseTasks.drop_all

        assert_match "This task only modifies local databases. my-db is on a remote host.",
          $stderr.string
      end
    end

    def test_drops_configurations_with_local_ip
      @configurations[:development]["host"] = "127.0.0.1"

      with_stubbed_configurations do
        assert_called(ActiveRecord::Tasks::DatabaseTasks, :drop) do
          ActiveRecord::Tasks::DatabaseTasks.drop_all
        end
      end
    end

    def test_drops_configurations_with_local_host
      @configurations[:development]["host"] = "localhost"

      with_stubbed_configurations do
        assert_called(ActiveRecord::Tasks::DatabaseTasks, :drop) do
          ActiveRecord::Tasks::DatabaseTasks.drop_all
        end
      end
    end

    def test_drops_configurations_with_blank_hosts
      @configurations[:development]["host"] = nil

      with_stubbed_configurations do
        assert_called(ActiveRecord::Tasks::DatabaseTasks, :drop) do
          ActiveRecord::Tasks::DatabaseTasks.drop_all
        end
      end
    end

    private
      def with_stubbed_configurations
        old_configurations = ActiveRecord::Base.configurations
        ActiveRecord::Base.configurations = @configurations

        yield
      ensure
        ActiveRecord::Base.configurations = old_configurations
      end
  end

  class DatabaseTasksDropCurrentTest < ActiveRecord::TestCase
    def setup
      @configurations = {
        "development" => { "database" => "dev-db" },
        "test"        => { "database" => "test-db" },
        "production"  => { "url" => "abstract://prod-db-host/prod-db" }
      }
    end

    def test_drops_current_environment_database
      with_stubbed_configurations do
        assert_called_with(ActiveRecord::Tasks::DatabaseTasks, :drop,
          ["database" => "test-db"]) do
          ActiveRecord::Tasks::DatabaseTasks.drop_current(
            ActiveSupport::StringInquirer.new("test")
          )
        end
      end
    end

    def test_drops_current_environment_database_with_url
      with_stubbed_configurations do
        assert_called_with(ActiveRecord::Tasks::DatabaseTasks, :drop,
          ["adapter" => "abstract", "database" => "prod-db", "host" => "prod-db-host"]) do
          ActiveRecord::Tasks::DatabaseTasks.drop_current(
            ActiveSupport::StringInquirer.new("production")
          )
        end
      end
    end

    def test_drops_test_and_development_databases_when_env_was_not_specified
      with_stubbed_configurations do
        assert_called_with(
          ActiveRecord::Tasks::DatabaseTasks,
          :drop,
          [
            ["database" => "dev-db"],
            ["database" => "test-db"]
          ]
        ) do
          ActiveRecord::Tasks::DatabaseTasks.drop_current(
            ActiveSupport::StringInquirer.new("development")
          )
        end
      end
    end

    def test_drops_testand_development_databases_when_rails_env_is_development
      old_env = ENV["RAILS_ENV"]
      ENV["RAILS_ENV"] = "development"

      with_stubbed_configurations do
        assert_called_with(
          ActiveRecord::Tasks::DatabaseTasks,
          :drop,
          [
            ["database" => "dev-db"],
            ["database" => "test-db"]
          ]
        ) do
          ActiveRecord::Tasks::DatabaseTasks.drop_current(
            ActiveSupport::StringInquirer.new("development")
          )
        end
      end
    ensure
      ENV["RAILS_ENV"] = old_env
    end

    private
      def with_stubbed_configurations
        old_configurations = ActiveRecord::Base.configurations
        ActiveRecord::Base.configurations = @configurations

        yield
      ensure
        ActiveRecord::Base.configurations = old_configurations
      end
  end

  class DatabaseTasksDropCurrentThreeTierTest < ActiveRecord::TestCase
    def setup
      @configurations = {
        "development" => { "primary" => { "database" => "dev-db" }, "secondary" => { "database" => "secondary-dev-db" } },
        "test" => { "primary" => { "database" => "test-db" }, "secondary" => { "database" => "secondary-test-db" } },
        "production" => { "primary" => { "url" => "abstract://prod-db-host/prod-db" }, "secondary" => { "url" => "abstract://secondary-prod-db-host/secondary-prod-db" } }
      }
    end

    def test_drops_current_environment_database
      with_stubbed_configurations do
        assert_called_with(
          ActiveRecord::Tasks::DatabaseTasks,
          :drop,
          [
            ["database" => "test-db"],
            ["database" => "secondary-test-db"]
          ]
        ) do
          ActiveRecord::Tasks::DatabaseTasks.drop_current(
            ActiveSupport::StringInquirer.new("test")
          )
        end
      end
    end

    def test_drops_current_environment_database_with_url
      with_stubbed_configurations do
        assert_called_with(
          ActiveRecord::Tasks::DatabaseTasks,
          :drop,
          [
            ["adapter" => "abstract", "database" => "prod-db", "host" => "prod-db-host"],
            ["adapter" => "abstract", "database" => "secondary-prod-db", "host" => "secondary-prod-db-host"]
          ]
        ) do
          ActiveRecord::Tasks::DatabaseTasks.drop_current(
            ActiveSupport::StringInquirer.new("production")
          )
        end
      end
    end

    def test_drops_test_and_development_databases_when_env_was_not_specified
      with_stubbed_configurations do
        assert_called_with(
          ActiveRecord::Tasks::DatabaseTasks,
          :drop,
          [
            ["database" => "dev-db"],
            ["database" => "secondary-dev-db"],
            ["database" => "test-db"],
            ["database" => "secondary-test-db"]
          ]
        ) do
          ActiveRecord::Tasks::DatabaseTasks.drop_current(
            ActiveSupport::StringInquirer.new("development")
          )
        end
      end
    end

    def test_drops_testand_development_databases_when_rails_env_is_development
      old_env = ENV["RAILS_ENV"]
      ENV["RAILS_ENV"] = "development"

      with_stubbed_configurations do
        assert_called_with(
          ActiveRecord::Tasks::DatabaseTasks,
          :drop,
          [
            ["database" => "dev-db"],
            ["database" => "secondary-dev-db"],
            ["database" => "test-db"],
            ["database" => "secondary-test-db"]
          ]
        ) do
          ActiveRecord::Tasks::DatabaseTasks.drop_current(
            ActiveSupport::StringInquirer.new("development")
          )
        end
      end
    ensure
      ENV["RAILS_ENV"] = old_env
    end

    private
      def with_stubbed_configurations
        old_configurations = ActiveRecord::Base.configurations
        ActiveRecord::Base.configurations = @configurations

        yield
      ensure
        ActiveRecord::Base.configurations = old_configurations
      end
  end

  if current_adapter?(:SQLite3Adapter) && !in_memory_db?
    class DatabaseTasksMigrationTestCase < ActiveRecord::TestCase
      self.use_transactional_tests = false

      # Use a memory db here to avoid having to rollback at the end
      setup do
        migrations_path = MIGRATIONS_ROOT + "/valid"
        file = ActiveRecord::Base.connection.raw_connection.filename
        @conn = ActiveRecord::Base.establish_connection adapter: "sqlite3",
          database: ":memory:", migrations_paths: migrations_path
        source_db = SQLite3::Database.new file
        dest_db = ActiveRecord::Base.connection.raw_connection
        backup = SQLite3::Backup.new(dest_db, "main", source_db, "main")
        backup.step(-1)
        backup.finish
      end

      teardown do
        @conn.release_connection if @conn
        ActiveRecord::Base.establish_connection :arunit
      end
    end

    class DatabaseTasksMigrateTest < DatabaseTasksMigrationTestCase
      def test_migrate_set_and_unset_verbose_and_version_env_vars
        verbose, version = ENV["VERBOSE"], ENV["VERSION"]
        ENV["VERSION"] = "2"
        ENV["VERBOSE"] = "false"

        # run down migration because it was already run on copied db
        assert_empty capture_migration_output

        ENV.delete("VERSION")
        ENV.delete("VERBOSE")

        # re-run up migration
        assert_includes capture_migration_output, "migrating"
      ensure
        ENV["VERBOSE"], ENV["VERSION"] = verbose, version
      end

      def test_migrate_set_and_unset_empty_values_for_verbose_and_version_env_vars
        verbose, version = ENV["VERBOSE"], ENV["VERSION"]

        ENV["VERSION"] = "2"
        ENV["VERBOSE"] = "false"

        # run down migration because it was already run on copied db
        assert_empty capture_migration_output

        ENV["VERBOSE"] = ""
        ENV["VERSION"] = ""

        # re-run up migration
        assert_includes capture_migration_output, "migrating"
      ensure
        ENV["VERBOSE"], ENV["VERSION"] = verbose, version
      end

      def test_migrate_set_and_unset_nonsense_values_for_verbose_and_version_env_vars
        verbose, version = ENV["VERBOSE"], ENV["VERSION"]

        # run down migration because it was already run on copied db
        ENV["VERSION"] = "2"
        ENV["VERBOSE"] = "false"

        assert_empty capture_migration_output

        ENV["VERBOSE"] = "yes"
        ENV["VERSION"] = "2"

        # run no migration because 2 was already run
        assert_empty capture_migration_output
      ensure
        ENV["VERBOSE"], ENV["VERSION"] = verbose, version
      end

      private
        def capture_migration_output
          capture(:stdout) do
            ActiveRecord::Tasks::DatabaseTasks.migrate
          end
        end
    end

    class DatabaseTasksMigrateStatusTest < DatabaseTasksMigrationTestCase
      def test_migrate_status_table
        ActiveRecord::SchemaMigration.create_table
        output = capture_migration_status
        assert_match(/database: :memory:/, output)
        assert_match(/down    001             Valid people have last names/, output)
        assert_match(/down    002             We need reminders/, output)
        assert_match(/down    003             Innocent jointable/, output)
        ActiveRecord::SchemaMigration.drop_table
      end

      private

        def capture_migration_status
          capture(:stdout) do
            ActiveRecord::Tasks::DatabaseTasks.migrate_status
          end
        end
    end
  end

  class DatabaseTasksMigrateErrorTest < ActiveRecord::TestCase
    self.use_transactional_tests = false

    def test_migrate_raise_error_on_invalid_version_format
      version = ENV["VERSION"]

      ENV["VERSION"] = "unknown"
      e = assert_raise(RuntimeError) { ActiveRecord::Tasks::DatabaseTasks.migrate }
      assert_match(/Invalid format of target version/, e.message)

      ENV["VERSION"] = "0.1.11"
      e = assert_raise(RuntimeError) { ActiveRecord::Tasks::DatabaseTasks.migrate }
      assert_match(/Invalid format of target version/, e.message)

      ENV["VERSION"] = "1.1.11"
      e = assert_raise(RuntimeError) { ActiveRecord::Tasks::DatabaseTasks.migrate }
      assert_match(/Invalid format of target version/, e.message)

      ENV["VERSION"] = "0 "
      e = assert_raise(RuntimeError) { ActiveRecord::Tasks::DatabaseTasks.migrate }
      assert_match(/Invalid format of target version/, e.message)

      ENV["VERSION"] = "1."
      e = assert_raise(RuntimeError) { ActiveRecord::Tasks::DatabaseTasks.migrate }
      assert_match(/Invalid format of target version/, e.message)

      ENV["VERSION"] = "1_"
      e = assert_raise(RuntimeError) { ActiveRecord::Tasks::DatabaseTasks.migrate }
      assert_match(/Invalid format of target version/, e.message)

      ENV["VERSION"] = "1_name"
      e = assert_raise(RuntimeError) { ActiveRecord::Tasks::DatabaseTasks.migrate }
      assert_match(/Invalid format of target version/, e.message)
    ensure
      ENV["VERSION"] = version
    end

    def test_migrate_raise_error_on_failed_check_target_version
      ActiveRecord::Tasks::DatabaseTasks.stub(:check_target_version, -> { raise "foo" }) do
        e = assert_raise(RuntimeError) { ActiveRecord::Tasks::DatabaseTasks.migrate }
        assert_equal "foo", e.message
      end
    end

    def test_migrate_clears_schema_cache_afterward
      assert_called(ActiveRecord::Base, :clear_cache!) do
        ActiveRecord::Tasks::DatabaseTasks.migrate
      end
    end
  end

  class DatabaseTasksPurgeTest < ActiveRecord::TestCase
    include DatabaseTasksSetupper

    ADAPTERS_TASKS.each do |k, v|
      define_method("test_#{k}_purge") do
        with_stubbed_new do
          assert_called(eval("@#{v}"), :purge) do
            ActiveRecord::Tasks::DatabaseTasks.purge "adapter" => k
          end
        end
      end
    end
  end

  class DatabaseTasksPurgeCurrentTest < ActiveRecord::TestCase
    def test_purges_current_environment_database
      old_configurations = ActiveRecord::Base.configurations
      configurations = {
        "development" => { "database" => "dev-db" },
        "test"        => { "database" => "test-db" },
        "production"  => { "database" => "prod-db" }
      }

      ActiveRecord::Base.configurations = configurations

      assert_called_with(
        ActiveRecord::Tasks::DatabaseTasks,
        :purge,
        ["database" => "prod-db"]
      ) do
        assert_called_with(ActiveRecord::Base, :establish_connection, [:production]) do
          ActiveRecord::Tasks::DatabaseTasks.purge_current("production")
        end
      end
    ensure
      ActiveRecord::Base.configurations = old_configurations
    end
  end

  class DatabaseTasksPurgeAllTest < ActiveRecord::TestCase
    def test_purge_all_local_configurations
      old_configurations = ActiveRecord::Base.configurations
      configurations = { development: { "database" => "my-db" } }
      ActiveRecord::Base.configurations = configurations

      assert_called_with(
        ActiveRecord::Tasks::DatabaseTasks,
        :purge,
        ["database" => "my-db"]
      ) do
        ActiveRecord::Tasks::DatabaseTasks.purge_all
      end
    ensure
      ActiveRecord::Base.configurations = old_configurations
    end
  end

  unless in_memory_db?
    class DatabaseTasksTruncateAllTest < ActiveRecord::TestCase
      self.use_transactional_tests = false

      fixtures :authors, :author_addresses

      def teardown
        ActiveRecord::Base.connection_handlers = { writing: ActiveRecord::Base.default_connection_handler }
      end

      def test_truncate_tables
        assert_operator Author.count, :>, 0
        assert_operator AuthorAddress.count, :>, 0

        old_configurations = ActiveRecord::Base.configurations
        configurations = { development: ActiveRecord::Base.configurations["arunit"] }
        ActiveRecord::Base.configurations = configurations

        ActiveRecord::Tasks::DatabaseTasks.stub(:root, nil) do
          ActiveRecord::Tasks::DatabaseTasks.truncate_all(
            ActiveSupport::StringInquirer.new("development")
          )
        end

        assert_equal 0, Author.count
        assert_equal 0, AuthorAddress.count
      ensure
        ActiveRecord::Base.configurations = old_configurations
      end
    end
  end

  class DatabaseTasksTruncateAllWithMultipleDatabasesTest < ActiveRecord::TestCase
    def setup
      @configurations = {
        "development" => { "primary" => { "database" => "dev-db" }, "secondary" => { "database" => "secondary-dev-db" } },
        "test" => { "primary" => { "database" => "test-db" }, "secondary" => { "database" => "secondary-test-db" } },
        "production" => { "primary" => { "url" => "abstract://prod-db-host/prod-db" }, "secondary" => { "url" => "abstract://secondary-prod-db-host/secondary-prod-db" } }
      }
    end

    def test_truncate_all_databases_for_environment
      with_stubbed_configurations do
        assert_called_with(
          ActiveRecord::Tasks::DatabaseTasks,
          :truncate_tables,
          [
            ["database" => "test-db"],
            ["database" => "secondary-test-db"]
          ]
        ) do
          ActiveRecord::Tasks::DatabaseTasks.truncate_all(
            ActiveSupport::StringInquirer.new("test")
          )
        end
      end
    end

    def test_truncate_all_databases_with_url_for_environment
      with_stubbed_configurations do
        assert_called_with(
          ActiveRecord::Tasks::DatabaseTasks,
          :truncate_tables,
          [
            ["adapter" => "abstract", "database" => "prod-db", "host" => "prod-db-host"],
            ["adapter" => "abstract", "database" => "secondary-prod-db", "host" => "secondary-prod-db-host"]
          ]
        ) do
          ActiveRecord::Tasks::DatabaseTasks.truncate_all(
            ActiveSupport::StringInquirer.new("production")
          )
        end
      end
    end

    def test_truncate_all_development_databases_when_env_is_not_specified
      with_stubbed_configurations do
        assert_called_with(
          ActiveRecord::Tasks::DatabaseTasks,
          :truncate_tables,
          [
            ["database" => "dev-db"],
            ["database" => "secondary-dev-db"]
          ]
        ) do
          ActiveRecord::Tasks::DatabaseTasks.truncate_all(
            ActiveSupport::StringInquirer.new("development")
          )
        end
      end
    end

    def test_truncate_all_development_databases_when_env_is_development
      old_env = ENV["RAILS_ENV"]
      ENV["RAILS_ENV"] = "development"

      with_stubbed_configurations do
        assert_called_with(
          ActiveRecord::Tasks::DatabaseTasks,
          :truncate_tables,
          [
            ["database" => "dev-db"],
            ["database" => "secondary-dev-db"]
          ]
        ) do
          ActiveRecord::Tasks::DatabaseTasks.truncate_all(
            ActiveSupport::StringInquirer.new("development")
          )
        end
      end
    ensure
      ENV["RAILS_ENV"] = old_env
    end

    private
      def with_stubbed_configurations
        old_configurations = ActiveRecord::Base.configurations
        ActiveRecord::Base.configurations = @configurations

        yield
      ensure
        ActiveRecord::Base.configurations = old_configurations
      end
  end

  class DatabaseTasksCharsetTest < ActiveRecord::TestCase
    include DatabaseTasksSetupper

    ADAPTERS_TASKS.each do |k, v|
      define_method("test_#{k}_charset") do
        with_stubbed_new do
          assert_called(eval("@#{v}"), :charset) do
            ActiveRecord::Tasks::DatabaseTasks.charset "adapter" => k
          end
        end
      end
    end
  end

  class DatabaseTasksCollationTest < ActiveRecord::TestCase
    include DatabaseTasksSetupper

    ADAPTERS_TASKS.each do |k, v|
      define_method("test_#{k}_collation") do
        with_stubbed_new do
          assert_called(eval("@#{v}"), :collation) do
            ActiveRecord::Tasks::DatabaseTasks.collation "adapter" => k
          end
        end
      end
    end
  end

  class DatabaseTaskTargetVersionTest < ActiveRecord::TestCase
    def test_target_version_returns_nil_if_version_does_not_exist
      version = ENV.delete("VERSION")
      assert_nil ActiveRecord::Tasks::DatabaseTasks.target_version
    ensure
      ENV["VERSION"] = version
    end

    def test_target_version_returns_nil_if_version_is_empty
      version = ENV["VERSION"]

      ENV["VERSION"] = ""
      assert_nil ActiveRecord::Tasks::DatabaseTasks.target_version
    ensure
      ENV["VERSION"] = version
    end

    def test_target_version_returns_converted_to_integer_env_version_if_version_exists
      version = ENV["VERSION"]

      ENV["VERSION"] = "0"
      assert_equal ENV["VERSION"].to_i, ActiveRecord::Tasks::DatabaseTasks.target_version

      ENV["VERSION"] = "42"
      assert_equal ENV["VERSION"].to_i, ActiveRecord::Tasks::DatabaseTasks.target_version

      ENV["VERSION"] = "042"
      assert_equal ENV["VERSION"].to_i, ActiveRecord::Tasks::DatabaseTasks.target_version
    ensure
      ENV["VERSION"] = version
    end
  end

  class DatabaseTaskCheckTargetVersionTest < ActiveRecord::TestCase
    def test_check_target_version_does_not_raise_error_on_empty_version
      version = ENV["VERSION"]
      ENV["VERSION"] = ""
      assert_nothing_raised { ActiveRecord::Tasks::DatabaseTasks.check_target_version }
    ensure
      ENV["VERSION"] = version
    end

    def test_check_target_version_does_not_raise_error_if_version_is_not_setted
      version = ENV.delete("VERSION")
      assert_nothing_raised { ActiveRecord::Tasks::DatabaseTasks.check_target_version }
    ensure
      ENV["VERSION"] = version
    end

    def test_check_target_version_raises_error_on_invalid_version_format
      version = ENV["VERSION"]

      ENV["VERSION"] = "unknown"
      e = assert_raise(RuntimeError) { ActiveRecord::Tasks::DatabaseTasks.check_target_version }
      assert_match(/Invalid format of target version/, e.message)

      ENV["VERSION"] = "0.1.11"
      e = assert_raise(RuntimeError) { ActiveRecord::Tasks::DatabaseTasks.check_target_version }
      assert_match(/Invalid format of target version/, e.message)

      ENV["VERSION"] = "1.1.11"
      e = assert_raise(RuntimeError) { ActiveRecord::Tasks::DatabaseTasks.check_target_version }
      assert_match(/Invalid format of target version/, e.message)

      ENV["VERSION"] = "0 "
      e = assert_raise(RuntimeError) { ActiveRecord::Tasks::DatabaseTasks.check_target_version }
      assert_match(/Invalid format of target version/, e.message)

      ENV["VERSION"] = "1."
      e = assert_raise(RuntimeError) { ActiveRecord::Tasks::DatabaseTasks.check_target_version }
      assert_match(/Invalid format of target version/, e.message)

      ENV["VERSION"] = "1_"
      e = assert_raise(RuntimeError) { ActiveRecord::Tasks::DatabaseTasks.check_target_version }
      assert_match(/Invalid format of target version/, e.message)

      ENV["VERSION"] = "1_name"
      e = assert_raise(RuntimeError) { ActiveRecord::Tasks::DatabaseTasks.check_target_version }
      assert_match(/Invalid format of target version/, e.message)
    ensure
      ENV["VERSION"] = version
    end

    def test_check_target_version_does_not_raise_error_on_valid_version_format
      version = ENV["VERSION"]

      ENV["VERSION"] = "0"
      assert_nothing_raised { ActiveRecord::Tasks::DatabaseTasks.check_target_version }

      ENV["VERSION"] = "1"
      assert_nothing_raised { ActiveRecord::Tasks::DatabaseTasks.check_target_version }

      ENV["VERSION"] = "001"
      assert_nothing_raised { ActiveRecord::Tasks::DatabaseTasks.check_target_version }

      ENV["VERSION"] = "001_name.rb"
      assert_nothing_raised { ActiveRecord::Tasks::DatabaseTasks.check_target_version }
    ensure
      ENV["VERSION"] = version
    end
  end

  class DatabaseTasksStructureDumpTest < ActiveRecord::TestCase
    include DatabaseTasksSetupper

    ADAPTERS_TASKS.each do |k, v|
      define_method("test_#{k}_structure_dump") do
        with_stubbed_new do
          assert_called_with(
            eval("@#{v}"), :structure_dump,
            ["awesome-file.sql", nil]
          ) do
            ActiveRecord::Tasks::DatabaseTasks.structure_dump({ "adapter" => k }, "awesome-file.sql")
          end
        end
      end
    end
  end

  class DatabaseTasksStructureLoadTest < ActiveRecord::TestCase
    include DatabaseTasksSetupper

    ADAPTERS_TASKS.each do |k, v|
      define_method("test_#{k}_structure_load") do
        with_stubbed_new do
          assert_called_with(
            eval("@#{v}"),
            :structure_load,
            ["awesome-file.sql", nil]
          ) do
            ActiveRecord::Tasks::DatabaseTasks.structure_load({ "adapter" => k }, "awesome-file.sql")
          end
        end
      end
    end
  end

  class DatabaseTasksCheckSchemaFileTest < ActiveRecord::TestCase
    def test_check_schema_file
      assert_called_with(Kernel, :abort, [/awesome-file.sql/]) do
        ActiveRecord::Tasks::DatabaseTasks.check_schema_file("awesome-file.sql")
      end
    end
  end

  class DatabaseTasksCheckSchemaFileDefaultsTest < ActiveRecord::TestCase
    def test_check_schema_file_defaults
      ActiveRecord::Tasks::DatabaseTasks.stub(:db_dir, "/tmp") do
        assert_equal "/tmp/schema.rb", ActiveRecord::Tasks::DatabaseTasks.schema_file
      end
    end
  end

  class DatabaseTasksCheckSchemaFileSpecifiedFormatsTest < ActiveRecord::TestCase
    { ruby: "schema.rb", sql: "structure.sql" }.each_pair do |fmt, filename|
      define_method("test_check_schema_file_for_#{fmt}_format") do
        ActiveRecord::Tasks::DatabaseTasks.stub(:db_dir, "/tmp") do
          assert_equal "/tmp/#{filename}", ActiveRecord::Tasks::DatabaseTasks.schema_file(fmt)
        end
      end
    end
  end
end