summaryrefslogtreecommitdiff
path: root/spec/models/merge_request_spec.rb
blob: bb63abd167b4454b57482128150233b6cd939882 (plain)
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
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
require 'spec_helper'

describe MergeRequest do
  include RepoHelpers
  include ProjectForksHelper

  subject { create(:merge_request) }

  describe 'associations' do
    it { is_expected.to belong_to(:target_project).class_name('Project') }
    it { is_expected.to belong_to(:source_project).class_name('Project') }
    it { is_expected.to belong_to(:merge_user).class_name("User") }
    it { is_expected.to belong_to(:assignee) }
    it { is_expected.to have_many(:merge_request_diffs) }
  end

  describe 'modules' do
    subject { described_class }

    it { is_expected.to include_module(InternalId) }
    it { is_expected.to include_module(Issuable) }
    it { is_expected.to include_module(Referable) }
    it { is_expected.to include_module(Sortable) }
    it { is_expected.to include_module(Taskable) }
  end

  describe "act_as_paranoid" do
    it { is_expected.to have_db_column(:deleted_at) }
    it { is_expected.to have_db_index(:deleted_at) }
  end

  describe 'validation' do
    it { is_expected.to validate_presence_of(:target_branch) }
    it { is_expected.to validate_presence_of(:source_branch) }

    context "Validation of merge user with Merge When Pipeline Succeeds" do
      it "allows user to be nil when the feature is disabled" do
        expect(subject).to be_valid
      end

      it "is invalid without merge user" do
        subject.merge_when_pipeline_succeeds = true
        expect(subject).not_to be_valid
      end

      it "is valid with merge user" do
        subject.merge_when_pipeline_succeeds = true
        subject.merge_user = build(:user)

        expect(subject).to be_valid
      end
    end

    context 'for forks' do
      let(:project) { create(:project) }
      let(:fork1) { fork_project(project) }
      let(:fork2) { fork_project(project) }

      it 'allows merge requests for sibling-forks' do
        subject.source_project = fork1
        subject.target_project = fork2

        expect(subject).to be_valid
      end
    end
  end

  describe 'respond to' do
    it { is_expected.to respond_to(:unchecked?) }
    it { is_expected.to respond_to(:can_be_merged?) }
    it { is_expected.to respond_to(:cannot_be_merged?) }
    it { is_expected.to respond_to(:merge_params) }
    it { is_expected.to respond_to(:merge_when_pipeline_succeeds) }
  end

  describe '.in_projects' do
    it 'returns the merge requests for a set of projects' do
      expect(described_class.in_projects(Project.all)).to eq([subject])
    end
  end

  describe '.set_latest_merge_request_diff_ids!' do
    def create_merge_request_with_diffs(source_branch, diffs: 2)
      params = {
        target_project: project,
        target_branch: 'master',
        source_project: project,
        source_branch: source_branch
      }

      create(:merge_request, params).tap do |mr|
        diffs.times { mr.merge_request_diffs.create }
      end
    end

    let(:project) { create(:project) }

    it 'sets IDs for merge requests, whether they are already set or not' do
      merge_requests = [
        create_merge_request_with_diffs('feature'),
        create_merge_request_with_diffs('feature-conflict'),
        create_merge_request_with_diffs('wip', diffs: 0),
        create_merge_request_with_diffs('csv')
      ]

      merge_requests.take(2).each do |merge_request|
        merge_request.update_column(:latest_merge_request_diff_id, nil)
      end

      expected = merge_requests.map do |merge_request|
        merge_request.merge_request_diffs.maximum(:id)
      end

      expect { project.merge_requests.set_latest_merge_request_diff_ids! }
        .to change { merge_requests.map { |mr| mr.reload.latest_merge_request_diff_id } }.to(expected)
    end
  end

  describe '#target_branch_sha' do
    let(:project) { create(:project, :repository) }

    subject { create(:merge_request, source_project: project, target_project: project) }

    context 'when the target branch does not exist' do
      before do
        project.repository.rm_branch(subject.author, subject.target_branch)
        subject.clear_memoized_shas
      end

      it 'returns nil' do
        expect(subject.target_branch_sha).to be_nil
      end
    end

    it 'returns memoized value' do
      subject.target_branch_sha = '8ffb3c15a5475e59ae909384297fede4badcb4c7'

      expect(subject.target_branch_sha).to eq '8ffb3c15a5475e59ae909384297fede4badcb4c7'
    end
  end

  describe '#card_attributes' do
    it 'includes the author name' do
      allow(subject).to receive(:author).and_return(double(name: 'Robert'))
      allow(subject).to receive(:assignee).and_return(nil)

      expect(subject.card_attributes)
        .to eq({ 'Author' => 'Robert', 'Assignee' => nil })
    end

    it 'includes the assignee name' do
      allow(subject).to receive(:author).and_return(double(name: 'Robert'))
      allow(subject).to receive(:assignee).and_return(double(name: 'Douwe'))

      expect(subject.card_attributes)
        .to eq({ 'Author' => 'Robert', 'Assignee' => 'Douwe' })
    end
  end

  describe '#assignee_ids' do
    it 'returns an array of the assigned user id' do
      subject.assignee_id = 123

      expect(subject.assignee_ids).to eq([123])
    end
  end

  describe '#assignee_ids=' do
    it 'sets assignee_id to the last id in the array' do
      subject.assignee_ids = [123, 456]

      expect(subject.assignee_id).to eq(456)
    end
  end

  describe '#assignee_or_author?' do
    let(:user) { create(:user) }

    it 'returns true for a user that is assigned to a merge request' do
      subject.assignee = user

      expect(subject.assignee_or_author?(user)).to eq(true)
    end

    it 'returns true for a user that is the author of a merge request' do
      subject.author = user

      expect(subject.assignee_or_author?(user)).to eq(true)
    end

    it 'returns false for a user that is not the assignee or author' do
      expect(subject.assignee_or_author?(user)).to eq(false)
    end
  end

  describe '#cache_merge_request_closes_issues!' do
    before do
      subject.project.team << [subject.author, :developer]
      subject.target_branch = subject.project.default_branch
    end

    it 'caches closed issues' do
      issue  = create :issue, project: subject.project
      commit = double('commit1', safe_message: "Fixes #{issue.to_reference}")
      allow(subject).to receive(:commits).and_return([commit])

      expect { subject.cache_merge_request_closes_issues!(subject.author) }.to change(subject.merge_requests_closing_issues, :count).by(1)
    end

    context 'when both internal and external issue trackers are enabled' do
      before do
        subject.project.has_external_issue_tracker = true
        subject.project.save!
        create(:jira_service, project: subject.project)
      end

      it 'does not cache issues from external trackers' do
        issue  = ExternalIssue.new('JIRA-123', subject.project)
        commit = double('commit1', safe_message: "Fixes #{issue.to_reference}")
        allow(subject).to receive(:commits).and_return([commit])

        expect { subject.cache_merge_request_closes_issues!(subject.author) }.not_to raise_error
        expect { subject.cache_merge_request_closes_issues!(subject.author) }.not_to change(subject.merge_requests_closing_issues, :count)
      end

      it 'caches an internal issue' do
        issue  = create(:issue, project: subject.project)
        commit = double('commit1', safe_message: "Fixes #{issue.to_reference}")
        allow(subject).to receive(:commits).and_return([commit])

        expect { subject.cache_merge_request_closes_issues!(subject.author) }
          .to change(subject.merge_requests_closing_issues, :count).by(1)
      end
    end

    context 'when only external issue tracker enabled' do
      before do
        subject.project.has_external_issue_tracker = true
        subject.project.issues_enabled = false
        subject.project.save!
      end

      it 'does not cache issues from external trackers' do
        issue  = ExternalIssue.new('JIRA-123', subject.project)
        commit = double('commit1', safe_message: "Fixes #{issue.to_reference}")
        allow(subject).to receive(:commits).and_return([commit])

        expect { subject.cache_merge_request_closes_issues!(subject.author) }.not_to change(subject.merge_requests_closing_issues, :count)
      end

      it 'does not cache an internal issue' do
        issue  = create(:issue, project: subject.project)
        commit = double('commit1', safe_message: "Fixes #{issue.to_reference}")
        allow(subject).to receive(:commits).and_return([commit])

        expect { subject.cache_merge_request_closes_issues!(subject.author) }
          .not_to change(subject.merge_requests_closing_issues, :count)
      end
    end
  end

  describe '#source_branch_sha' do
    let(:last_branch_commit) { subject.source_project.repository.commit(Gitlab::Git::BRANCH_REF_PREFIX + subject.source_branch) }

    context 'with diffs' do
      subject { create(:merge_request, :with_diffs) }
      it 'returns the sha of the source branch last commit' do
        expect(subject.source_branch_sha).to eq(last_branch_commit.sha)
      end
    end

    context 'without diffs' do
      subject { create(:merge_request, :without_diffs) }
      it 'returns the sha of the source branch last commit' do
        expect(subject.source_branch_sha).to eq(last_branch_commit.sha)
      end

      context 'when there is a tag name matching the branch name' do
        let(:tag_name) { subject.source_branch }

        it 'returns the sha of the source branch last commit' do
          subject.source_project.repository.add_tag(subject.author,
                                                    tag_name,
                                                    subject.target_branch_sha,
                                                    'Add a tag')

          expect(subject.source_branch_sha).to eq(last_branch_commit.sha)

          subject.source_project.repository.rm_tag(subject.author, tag_name)
        end
      end
    end

    context 'when the merge request is being created' do
      subject { build(:merge_request, source_branch: nil, compare_commits: []) }
      it 'returns nil' do
        expect(subject.source_branch_sha).to be_nil
      end
    end

    it 'returns memoized value' do
      subject.source_branch_sha = '2e5d3239642f9161dcbbc4b70a211a68e5e45e2b'

      expect(subject.source_branch_sha).to eq '2e5d3239642f9161dcbbc4b70a211a68e5e45e2b'
    end
  end

  describe '#to_reference' do
    let(:project) { build(:project, name: 'sample-project') }
    let(:merge_request) { build(:merge_request, target_project: project, iid: 1) }

    it 'returns a String reference to the object' do
      expect(merge_request.to_reference).to eq "!1"
    end

    it 'supports a cross-project reference' do
      another_project = build(:project, name: 'another-project', namespace: project.namespace)
      expect(merge_request.to_reference(another_project)).to eq "sample-project!1"
    end

    it 'returns a String reference with the full path' do
      expect(merge_request.to_reference(full: true)).to eq(project.full_path + '!1')
    end
  end

  describe '#raw_diffs' do
    let(:merge_request) { build(:merge_request) }
    let(:options) { { paths: ['a/b', 'b/a', 'c/*'] } }

    context 'when there are MR diffs' do
      it 'delegates to the MR diffs' do
        merge_request.merge_request_diff = MergeRequestDiff.new

        expect(merge_request.merge_request_diff).to receive(:raw_diffs).with(options)

        merge_request.raw_diffs(options)
      end
    end

    context 'when there are no MR diffs' do
      it 'delegates to the compare object' do
        merge_request.compare = double(:compare)

        expect(merge_request.compare).to receive(:raw_diffs).with(options)

        merge_request.raw_diffs(options)
      end
    end
  end

  describe '#diffs' do
    let(:merge_request) { build(:merge_request) }
    let(:options) { { paths: ['a/b', 'b/a', 'c/*'] } }

    context 'when there are MR diffs' do
      it 'delegates to the MR diffs' do
        merge_request.save

        expect(merge_request.merge_request_diff).to receive(:raw_diffs).with(hash_including(options))

        merge_request.diffs(options)
      end
    end

    context 'when there are no MR diffs' do
      it 'delegates to the compare object, setting expanded: true' do
        merge_request.compare = double(:compare)

        expect(merge_request.compare).to receive(:diffs).with(options.merge(expanded: true))

        merge_request.diffs(options)
      end
    end
  end

  describe '#diff_size' do
    let(:merge_request) do
      build(:merge_request, source_branch: 'expand-collapse-files', target_branch: 'master')
    end

    context 'when there are MR diffs' do
      it 'returns the correct count' do
        merge_request.save

        expect(merge_request.diff_size).to eq('105')
      end

      it 'returns the correct overflow count' do
        allow(Commit).to receive(:max_diff_options).and_return(max_files: 2)
        merge_request.save

        expect(merge_request.diff_size).to eq('2+')
      end

      it 'does not perform highlighting' do
        merge_request.save

        expect(Gitlab::Diff::Highlight).not_to receive(:new)

        merge_request.diff_size
      end
    end

    context 'when there are no MR diffs' do
      def set_compare(merge_request)
        merge_request.compare = CompareService.new(
          merge_request.source_project,
          merge_request.source_branch
        ).execute(
          merge_request.target_project,
          merge_request.target_branch
        )
      end

      it 'returns the correct count' do
        set_compare(merge_request)

        expect(merge_request.diff_size).to eq('105')
      end

      it 'returns the correct overflow count' do
        allow(Commit).to receive(:max_diff_options).and_return(max_files: 2)
        set_compare(merge_request)

        expect(merge_request.diff_size).to eq('2+')
      end

      it 'does not perform highlighting' do
        set_compare(merge_request)

        expect(Gitlab::Diff::Highlight).not_to receive(:new)

        merge_request.diff_size
      end
    end
  end

  describe "#related_notes" do
    let!(:merge_request) { create(:merge_request) }

    before do
      allow(merge_request).to receive(:commits) { [merge_request.source_project.repository.commit] }
      create(:note_on_commit, commit_id: merge_request.commits.first.id,
                              project: merge_request.project)
      create(:note, noteable: merge_request, project: merge_request.project)
    end

    it "includes notes for commits" do
      expect(merge_request.commits).not_to be_empty
      expect(merge_request.related_notes.count).to eq(2)
    end

    it "includes notes for commits from target project as well" do
      create(:note_on_commit, commit_id: merge_request.commits.first.id,
                              project: merge_request.target_project)

      expect(merge_request.commits).not_to be_empty
      expect(merge_request.related_notes.count).to eq(3)
    end
  end

  describe '#for_fork?' do
    it 'returns true if the merge request is for a fork' do
      subject.source_project = build_stubbed(:project, namespace: create(:group))
      subject.target_project = build_stubbed(:project, namespace: create(:group))

      expect(subject.for_fork?).to be_truthy
    end

    it 'returns false if is not for a fork' do
      expect(subject.for_fork?).to be_falsey
    end
  end

  describe '#closes_issues' do
    let(:issue0) { create :issue, project: subject.project }
    let(:issue1) { create :issue, project: subject.project }

    let(:commit0) { double('commit0', safe_message: "Fixes #{issue0.to_reference}") }
    let(:commit1) { double('commit1', safe_message: "Fixes #{issue0.to_reference}") }
    let(:commit2) { double('commit2', safe_message: "Fixes #{issue1.to_reference}") }

    before do
      subject.project.team << [subject.author, :developer]
      allow(subject).to receive(:commits).and_return([commit0, commit1, commit2])
    end

    it 'accesses the set of issues that will be closed on acceptance' do
      allow(subject.project).to receive(:default_branch)
        .and_return(subject.target_branch)

      closed = subject.closes_issues

      expect(closed).to include(issue0, issue1)
    end

    it 'only lists issues as to be closed if it targets the default branch' do
      allow(subject.project).to receive(:default_branch).and_return('master')
      subject.target_branch = 'something-else'

      expect(subject.closes_issues).to be_empty
    end
  end

  describe '#issues_mentioned_but_not_closing' do
    let(:closing_issue) { create :issue, project: subject.project }
    let(:mentioned_issue) { create :issue, project: subject.project }

    let(:commit) { double('commit', safe_message: "Fixes #{closing_issue.to_reference}") }

    it 'detects issues mentioned in description but not closed' do
      subject.project.team << [subject.author, :developer]
      subject.description = "Is related to #{mentioned_issue.to_reference} and #{closing_issue.to_reference}"

      allow(subject).to receive(:commits).and_return([commit])
      allow(subject.project).to receive(:default_branch)
        .and_return(subject.target_branch)

      expect(subject.issues_mentioned_but_not_closing(subject.author)).to match_array([mentioned_issue])
    end

    context 'when the project has an external issue tracker' do
      before do
        subject.project.team << [subject.author, :developer]
        commit = double(:commit, safe_message: 'Fixes TEST-3')

        create(:jira_service, project: subject.project)

        allow(subject).to receive(:commits).and_return([commit])
        allow(subject).to receive(:description).and_return('Is related to TEST-2 and TEST-3')
        allow(subject.project).to receive(:default_branch).and_return(subject.target_branch)
      end

      it 'detects issues mentioned in description but not closed' do
        expect(subject.issues_mentioned_but_not_closing(subject.author).map(&:to_s)).to match_array(['TEST-2'])
      end
    end
  end

  describe "#work_in_progress?" do
    ['WIP ', 'WIP:', 'WIP: ', '[WIP]', '[WIP] ', ' [WIP] WIP [WIP] WIP: WIP '].each do |wip_prefix|
      it "detects the '#{wip_prefix}' prefix" do
        subject.title = "#{wip_prefix}#{subject.title}"
        expect(subject.work_in_progress?).to eq true
      end
    end

    it "doesn't detect WIP for words starting with WIP" do
      subject.title = "Wipwap #{subject.title}"
      expect(subject.work_in_progress?).to eq false
    end

    it "doesn't detect WIP for words containing with WIP" do
      subject.title = "WupWipwap #{subject.title}"
      expect(subject.work_in_progress?).to eq false
    end

    it "doesn't detect WIP by default" do
      expect(subject.work_in_progress?).to eq false
    end
  end

  describe "#wipless_title" do
    ['WIP ', 'WIP:', 'WIP: ', '[WIP]', '[WIP] ', ' [WIP] WIP [WIP] WIP: WIP '].each do |wip_prefix|
      it "removes the '#{wip_prefix}' prefix" do
        wipless_title = subject.title
        subject.title = "#{wip_prefix}#{subject.title}"

        expect(subject.wipless_title).to eq wipless_title
      end

      it "is satisfies the #work_in_progress? method" do
        subject.title = "#{wip_prefix}#{subject.title}"
        subject.title = subject.wipless_title

        expect(subject.work_in_progress?).to eq false
      end
    end
  end

  describe "#wip_title" do
    it "adds the WIP: prefix to the title" do
      wip_title = "WIP: #{subject.title}"

      expect(subject.wip_title).to eq wip_title
    end

    it "does not add the WIP: prefix multiple times" do
      wip_title = "WIP: #{subject.title}"
      subject.title = subject.wip_title
      subject.title = subject.wip_title

      expect(subject.wip_title).to eq wip_title
    end

    it "is satisfies the #work_in_progress? method" do
      subject.title = subject.wip_title

      expect(subject.work_in_progress?).to eq true
    end
  end

  describe '#can_remove_source_branch?' do
    set(:user) { create(:user) }
    set(:merge_request) { create(:merge_request, :simple) }

    subject { merge_request }

    before do
      subject.source_project.add_master(user)
    end

    it "can't be removed when its a protected branch" do
      allow(ProtectedBranch).to receive(:protected?).and_return(true)

      expect(subject.can_remove_source_branch?(user)).to be_falsey
    end

    it "can't remove a root ref" do
      subject.update(source_branch: 'master', target_branch: 'feature')

      expect(subject.can_remove_source_branch?(user)).to be_falsey
    end

    it "is unable to remove the source branch for a project the user cannot push to" do
      user2 = create(:user)

      expect(subject.can_remove_source_branch?(user2)).to be_falsey
    end

    it "can be removed if the last commit is the head of the source branch" do
      allow(subject).to receive(:source_branch_head).and_return(subject.diff_head_commit)

      expect(subject.can_remove_source_branch?(user)).to be_truthy
    end

    it "cannot be removed if the last commit is not also the head of the source branch" do
      subject.clear_memoized_shas
      subject.source_branch = "lfs"

      expect(subject.can_remove_source_branch?(user)).to be_falsey
    end
  end

  describe '#merge_commit_message' do
    it 'includes merge information as the title' do
      request = build(:merge_request, source_branch: 'source', target_branch: 'target')

      expect(request.merge_commit_message)
        .to match("Merge branch 'source' into 'target'\n\n")
    end

    it 'includes its title in the body' do
      request = build(:merge_request, title: 'Remove all technical debt')

      expect(request.merge_commit_message)
        .to match("Remove all technical debt\n\n")
    end

    it 'includes its closed issues in the body' do
      issue = create(:issue, project: subject.project)

      subject.project.team << [subject.author, :developer]
      subject.description = "This issue Closes #{issue.to_reference}"

      allow(subject.project).to receive(:default_branch)
        .and_return(subject.target_branch)

      expect(subject.merge_commit_message)
        .to match("Closes #{issue.to_reference}")
    end

    it 'includes its reference in the body' do
      request = build_stubbed(:merge_request)

      expect(request.merge_commit_message)
        .to match("See merge request #{request.to_reference(full: true)}")
    end

    it 'excludes multiple linebreak runs when description is blank' do
      request = build(:merge_request, title: 'Title', description: nil)

      expect(request.merge_commit_message).not_to match("Title\n\n\n\n")
    end

    it 'includes its description in the body' do
      request = build(:merge_request, description: 'By removing all code')

      expect(request.merge_commit_message(include_description: true))
        .to match("By removing all code\n\n")
    end

    it 'does not includes its description in the body' do
      request = build(:merge_request, description: 'By removing all code')

      expect(request.merge_commit_message)
        .not_to match("By removing all code\n\n")
    end
  end

  describe "#reset_merge_when_pipeline_succeeds" do
    let(:merge_if_green) do
      create :merge_request, merge_when_pipeline_succeeds: true, merge_user: create(:user),
                             merge_params: { "should_remove_source_branch" => "1", "commit_message" => "msg" }
    end

    it "sets the item to false" do
      merge_if_green.reset_merge_when_pipeline_succeeds
      merge_if_green.reload

      expect(merge_if_green.merge_when_pipeline_succeeds).to be_falsey
      expect(merge_if_green.merge_params["should_remove_source_branch"]).to be_nil
      expect(merge_if_green.merge_params["commit_message"]).to be_nil
    end
  end

  describe '#hook_attrs' do
    it 'delegates to Gitlab::HookData::MergeRequestBuilder#build' do
      builder = double

      expect(Gitlab::HookData::MergeRequestBuilder)
        .to receive(:new).with(subject).and_return(builder)
      expect(builder).to receive(:build)

      subject.hook_attrs
    end
  end

  describe '#diverged_commits_count' do
    let(:project)      { create(:project, :repository) }
    let(:forked_project) { fork_project(project, nil, repository: true) }

    context 'when the target branch does not exist anymore' do
      subject { create(:merge_request, source_project: project, target_project: project) }

      before do
        project.repository.raw_repository.delete_branch(subject.target_branch)
        subject.clear_memoized_shas
      end

      it 'does not crash' do
        expect { subject.diverged_commits_count }.not_to raise_error
      end

      it 'returns 0' do
        expect(subject.diverged_commits_count).to eq(0)
      end
    end

    context 'diverged on same repository' do
      subject(:merge_request_with_divergence) { create(:merge_request, :diverged, source_project: project, target_project: project) }

      it 'counts commits that are on target branch but not on source branch' do
        expect(subject.diverged_commits_count).to eq(29)
      end
    end

    context 'diverged on fork' do
      subject(:merge_request_fork_with_divergence) { create(:merge_request, :diverged, source_project: forked_project, target_project: project) }

      it 'counts commits that are on target branch but not on source branch' do
        expect(subject.diverged_commits_count).to eq(29)
      end
    end

    context 'rebased on fork' do
      subject(:merge_request_rebased) { create(:merge_request, :rebased, source_project: forked_project, target_project: project) }

      it 'counts commits that are on target branch but not on source branch' do
        expect(subject.diverged_commits_count).to eq(0)
      end
    end

    describe 'caching' do
      before do
        allow(Rails).to receive(:cache).and_return(ActiveSupport::Cache::MemoryStore.new)
      end

      it 'caches the output' do
        expect(subject).to receive(:compute_diverged_commits_count)
          .once
          .and_return(2)

        subject.diverged_commits_count
        subject.diverged_commits_count
      end

      it 'invalidates the cache when the source sha changes' do
        expect(subject).to receive(:compute_diverged_commits_count)
          .twice
          .and_return(2)

        subject.diverged_commits_count
        allow(subject).to receive(:source_branch_sha).and_return('123abc')
        subject.diverged_commits_count
      end

      it 'invalidates the cache when the target sha changes' do
        expect(subject).to receive(:compute_diverged_commits_count)
          .twice
          .and_return(2)

        subject.diverged_commits_count
        allow(subject).to receive(:target_branch_sha).and_return('123abc')
        subject.diverged_commits_count
      end
    end
  end

  it_behaves_like 'an editable mentionable' do
    subject { create(:merge_request, :simple) }

    let(:backref_text) { "merge request #{subject.to_reference}" }
    let(:set_mentionable_text) { ->(txt) { subject.description = txt } }
  end

  it_behaves_like 'a Taskable' do
    subject { create :merge_request, :simple }
  end

  describe '#commit_shas' do
    before do
      allow(subject.merge_request_diff).to receive(:commit_shas)
        .and_return(['sha1'])
    end

    it 'delegates to merge request diff' do
      expect(subject.commit_shas).to eq ['sha1']
    end
  end

  context 'head pipeline' do
    before do
      allow(subject).to receive(:diff_head_sha).and_return('lastsha')
    end

    describe '#head_pipeline' do
      it 'returns nil for MR without head_pipeline_id' do
        subject.update_attribute(:head_pipeline_id, nil)

        expect(subject.head_pipeline).to be_nil
      end

      context 'when the source project does not exist' do
        it 'returns nil' do
          allow(subject).to receive(:source_project).and_return(nil)

          expect(subject.head_pipeline).to be_nil
        end
      end
    end

    describe '#actual_head_pipeline' do
      it 'returns nil for MR with old pipeline' do
        pipeline = create(:ci_empty_pipeline, sha: 'notlatestsha')
        subject.update_attribute(:head_pipeline_id, pipeline.id)

        expect(subject.actual_head_pipeline).to be_nil
      end

      it 'returns the pipeline for MR with recent pipeline' do
        pipeline = create(:ci_empty_pipeline, sha: 'lastsha')
        subject.update_attribute(:head_pipeline_id, pipeline.id)

        expect(subject.actual_head_pipeline).to eq(subject.head_pipeline)
        expect(subject.actual_head_pipeline).to eq(pipeline)
      end

      it 'returns nil when source project does not exist' do
        allow(subject).to receive(:source_project).and_return(nil)

        expect(subject.actual_head_pipeline).to be_nil
      end
    end
  end

  describe '#has_ci?' do
    let(:merge_request) { build_stubbed(:merge_request) }

    context 'has ci' do
      it 'returns true if MR has head_pipeline_id and commits' do
        allow(merge_request).to receive_message_chain(:source_project, :ci_service) { nil }
        allow(merge_request).to receive(:head_pipeline_id) { double }
        allow(merge_request).to receive(:has_no_commits?) { false }

        expect(merge_request.has_ci?).to be(true)
      end

      it 'returns true if MR has any pipeline and commits' do
        allow(merge_request).to receive_message_chain(:source_project, :ci_service) { nil }
        allow(merge_request).to receive(:head_pipeline_id) { nil }
        allow(merge_request).to receive(:has_no_commits?) { false }
        allow(merge_request).to receive(:all_pipelines) { [double] }

        expect(merge_request.has_ci?).to be(true)
      end

      it 'returns true if MR has CI service and commits' do
        allow(merge_request).to receive_message_chain(:source_project, :ci_service) { double }
        allow(merge_request).to receive(:head_pipeline_id) { nil }
        allow(merge_request).to receive(:has_no_commits?) { false }
        allow(merge_request).to receive(:all_pipelines) { [] }

        expect(merge_request.has_ci?).to be(true)
      end
    end

    context 'has no ci' do
      it 'returns false if MR has no CI service nor pipeline, and no commits' do
        allow(merge_request).to receive_message_chain(:source_project, :ci_service) { nil }
        allow(merge_request).to receive(:head_pipeline_id) { nil }
        allow(merge_request).to receive(:all_pipelines) { [] }
        allow(merge_request).to receive(:has_no_commits?) { true }

        expect(merge_request.has_ci?).to be(false)
      end
    end
  end

  describe '#all_pipelines' do
    shared_examples 'returning pipelines with proper ordering' do
      let!(:all_pipelines) do
        subject.all_commit_shas.map do |sha|
          create(:ci_empty_pipeline,
                 project: subject.source_project,
                 sha: sha,
                 ref: subject.source_branch)
        end
      end

      it 'returns all pipelines' do
        expect(subject.all_pipelines).not_to be_empty
        expect(subject.all_pipelines).to eq(all_pipelines.reverse)
      end
    end

    context 'with single merge_request_diffs' do
      it_behaves_like 'returning pipelines with proper ordering'
    end

    context 'with multiple irrelevant merge_request_diffs' do
      before do
        subject.update(target_branch: 'v1.0.0')
      end

      it_behaves_like 'returning pipelines with proper ordering'
    end

    context 'with unsaved merge request' do
      subject { build(:merge_request) }

      let!(:pipeline) do
        create(:ci_empty_pipeline,
               project: subject.project,
               sha: subject.diff_head_sha,
               ref: subject.source_branch)
      end

      it 'returns pipelines from diff_head_sha' do
        expect(subject.all_pipelines).to contain_exactly(pipeline)
      end
    end
  end

  describe '#all_commit_shas' do
    context 'when merge request is persisted' do
      let(:all_commit_shas) do
        subject.merge_request_diffs.flat_map(&:commits).map(&:sha).uniq
      end

      shared_examples 'returning all SHA' do
        it 'returns all SHAs from all merge_request_diffs' do
          expect(subject.merge_request_diffs.size).to eq(2)
          expect(subject.all_commit_shas).to match_array(all_commit_shas)
        end
      end

      context 'with a completely different branch' do
        before do
          subject.update(target_branch: 'csv')
        end

        it_behaves_like 'returning all SHA'
      end

      context 'with a branch having no difference' do
        before do
          subject.update(target_branch: 'branch-merged')
          subject.reload # make sure commits were not cached
        end

        it_behaves_like 'returning all SHA'
      end
    end

    context 'when merge request is not persisted' do
      context 'when compare commits are set in the service' do
        let(:commit) { spy('commit') }

        subject do
          build(:merge_request, compare_commits: [commit, commit])
        end

        it 'returns commits from compare commits temporary data' do
          expect(subject.all_commit_shas).to eq [commit, commit]
        end
      end

      context 'when compare commits are not set in the service' do
        subject { build(:merge_request) }

        it 'returns array with diff head sha element only' do
          expect(subject.all_commit_shas).to eq [subject.diff_head_sha]
        end
      end
    end
  end

  describe '#participants' do
    let(:project) { create(:project, :public) }

    let(:mr) do
      create(:merge_request, source_project: project, target_project: project)
    end

    let!(:note1) do
      create(:note_on_merge_request, noteable: mr, project: project, note: 'a')
    end

    let!(:note2) do
      create(:note_on_merge_request, noteable: mr, project: project, note: 'b')
    end

    it 'includes the merge request author' do
      expect(mr.participants).to include(mr.author)
    end

    it 'includes the authors of the notes' do
      expect(mr.participants).to include(note1.author, note2.author)
    end
  end

  describe 'cached counts' do
    it 'updates when assignees change' do
      user1 = create(:user)
      user2 = create(:user)
      mr = create(:merge_request, assignee: user1)
      mr.project.add_developer(user1)
      mr.project.add_developer(user2)

      expect(user1.assigned_open_merge_requests_count).to eq(1)
      expect(user2.assigned_open_merge_requests_count).to eq(0)

      mr.assignee = user2
      mr.save

      expect(user1.assigned_open_merge_requests_count).to eq(0)
      expect(user2.assigned_open_merge_requests_count).to eq(1)
    end
  end

  describe '#merge_async' do
    it 'enqueues MergeWorker job and updates merge_jid' do
      merge_request = create(:merge_request)
      user_id = double(:user_id)
      params = double(:params)
      merge_jid = 'hash-123'

      expect(MergeWorker).to receive(:perform_async).with(merge_request.id, user_id, params) do
        merge_jid
      end

      merge_request.merge_async(user_id, params)

      expect(merge_request.reload.merge_jid).to eq(merge_jid)
    end
  end

  describe '#check_if_can_be_merged' do
    let(:project) { create(:project, only_allow_merge_if_pipeline_succeeds: true) }

    subject { create(:merge_request, source_project: project, merge_status: :unchecked) }

    context 'when it is not broken and has no conflicts' do
      before do
        allow(subject).to receive(:broken?) { false }
        allow(project.repository).to receive(:can_be_merged?).and_return(true)
      end

      it 'is marked as mergeable' do
        expect { subject.check_if_can_be_merged }.to change { subject.merge_status }.to('can_be_merged')
      end
    end

    context 'when broken' do
      before do
        allow(subject).to receive(:broken?) { true }
      end

      it 'becomes unmergeable' do
        expect { subject.check_if_can_be_merged }.to change { subject.merge_status }.to('cannot_be_merged')
      end
    end

    context 'when it has conflicts' do
      before do
        allow(subject).to receive(:broken?) { false }
        allow(project.repository).to receive(:can_be_merged?).and_return(false)
      end

      it 'becomes unmergeable' do
        expect { subject.check_if_can_be_merged }.to change { subject.merge_status }.to('cannot_be_merged')
      end
    end
  end

  describe '#mergeable?' do
    let(:project) { create(:project) }

    subject { create(:merge_request, source_project: project) }

    it 'returns false if #mergeable_state? is false' do
      expect(subject).to receive(:mergeable_state?) { false }

      expect(subject.mergeable?).to be_falsey
    end

    it 'return true if #mergeable_state? is true and the MR #can_be_merged? is true' do
      allow(subject).to receive(:mergeable_state?) { true }
      expect(subject).to receive(:check_if_can_be_merged)
      expect(subject).to receive(:can_be_merged?) { true }

      expect(subject.mergeable?).to be_truthy
    end
  end

  describe '#mergeable_state?' do
    let(:project) { create(:project, :repository) }

    subject { create(:merge_request, source_project: project) }

    it 'checks if merge request can be merged' do
      allow(subject).to receive(:mergeable_ci_state?) { true }
      expect(subject).to receive(:check_if_can_be_merged)

      subject.mergeable?
    end

    context 'when not open' do
      before do
        subject.close
      end

      it 'returns false' do
        expect(subject.mergeable_state?).to be_falsey
      end
    end

    context 'when working in progress' do
      before do
        subject.title = 'WIP MR'
      end

      it 'returns false' do
        expect(subject.mergeable_state?).to be_falsey
      end
    end

    context 'when broken' do
      before do
        allow(subject).to receive(:broken?) { true }
      end

      it 'returns false' do
        expect(subject.mergeable_state?).to be_falsey
      end
    end

    context 'when failed' do
      context 'when #mergeable_ci_state? is false' do
        before do
          allow(subject).to receive(:mergeable_ci_state?) { false }
        end

        it 'returns false' do
          expect(subject.mergeable_state?).to be_falsey
        end
      end

      context 'when #mergeable_discussions_state? is false' do
        before do
          allow(subject).to receive(:mergeable_discussions_state?) { false }
        end

        it 'returns false' do
          expect(subject.mergeable_state?).to be_falsey
        end
      end
    end
  end

  describe '#mergeable_ci_state?' do
    let(:project) { create(:project, only_allow_merge_if_pipeline_succeeds: true) }
    let(:pipeline) { create(:ci_empty_pipeline) }

    subject { build(:merge_request, target_project: project) }

    context 'when it is only allowed to merge when build is green' do
      context 'and a failed pipeline is associated' do
        before do
          pipeline.update(status: 'failed', sha: subject.diff_head_sha)
          allow(subject).to receive(:head_pipeline) { pipeline }
        end

        it { expect(subject.mergeable_ci_state?).to be_falsey }
      end

      context 'and a successful pipeline is associated' do
        before do
          pipeline.update(status: 'success', sha: subject.diff_head_sha)
          allow(subject).to receive(:head_pipeline) { pipeline }
        end

        it { expect(subject.mergeable_ci_state?).to be_truthy }
      end

      context 'and a skipped pipeline is associated' do
        before do
          pipeline.update(status: 'skipped', sha: subject.diff_head_sha)
          allow(subject).to receive(:head_pipeline) { pipeline }
        end

        it { expect(subject.mergeable_ci_state?).to be_truthy }
      end

      context 'when no pipeline is associated' do
        before do
          allow(subject).to receive(:head_pipeline) { nil }
        end

        it { expect(subject.mergeable_ci_state?).to be_truthy }
      end
    end

    context 'when merges are not restricted to green builds' do
      subject { build(:merge_request, target_project: build(:project, only_allow_merge_if_pipeline_succeeds: false)) }

      context 'and a failed pipeline is associated' do
        before do
          pipeline.statuses << create(:commit_status, status: 'failed', project: project)
          allow(subject).to receive(:head_pipeline) { pipeline }
        end

        it { expect(subject.mergeable_ci_state?).to be_truthy }
      end

      context 'when no pipeline is associated' do
        before do
          allow(subject).to receive(:head_pipeline) { nil }
        end

        it { expect(subject.mergeable_ci_state?).to be_truthy }
      end
    end
  end

  describe '#mergeable_discussions_state?' do
    let(:merge_request) { create(:merge_request_with_diff_notes, source_project: project) }

    context 'when project.only_allow_merge_if_all_discussions_are_resolved == true' do
      let(:project) { create(:project, :repository, only_allow_merge_if_all_discussions_are_resolved: true) }

      context 'with all discussions resolved' do
        before do
          merge_request.discussions.each { |d| d.resolve!(merge_request.author) }
        end

        it 'returns true' do
          expect(merge_request.mergeable_discussions_state?).to be_truthy
        end
      end

      context 'with unresolved discussions' do
        before do
          merge_request.discussions.each(&:unresolve!)
        end

        it 'returns false' do
          expect(merge_request.mergeable_discussions_state?).to be_falsey
        end
      end

      context 'with no discussions' do
        before do
          merge_request.notes.destroy_all
        end

        it 'returns true' do
          expect(merge_request.mergeable_discussions_state?).to be_truthy
        end
      end
    end

    context 'when project.only_allow_merge_if_all_discussions_are_resolved == false' do
      let(:project) { create(:project, :repository, only_allow_merge_if_all_discussions_are_resolved: false) }

      context 'with unresolved discussions' do
        before do
          merge_request.discussions.each(&:unresolve!)
        end

        it 'returns true' do
          expect(merge_request.mergeable_discussions_state?).to be_truthy
        end
      end
    end
  end

  describe "#environments_for" do
    let(:project)       { create(:project, :repository) }
    let(:user)          { project.creator }
    let(:merge_request) { create(:merge_request, source_project: project) }

    before do
      merge_request.source_project.add_master(user)
      merge_request.target_project.add_master(user)
    end

    context 'with multiple environments' do
      let(:environments) { create_list(:environment, 3, project: project) }

      before do
        create(:deployment, environment: environments.first, ref: 'master', sha: project.commit('master').id)
        create(:deployment, environment: environments.second, ref: 'feature', sha: project.commit('feature').id)
      end

      it 'selects deployed environments' do
        expect(merge_request.environments_for(user)).to contain_exactly(environments.first)
      end
    end

    context 'with environments on source project' do
      let(:source_project) { fork_project(project, nil, repository: true) }

      let(:merge_request) do
        create(:merge_request,
               source_project: source_project, source_branch: 'feature',
               target_project: project)
      end

      let(:source_environment) { create(:environment, project: source_project) }

      before do
        create(:deployment, environment: source_environment, ref: 'feature', sha: merge_request.diff_head_sha)
      end

      it 'selects deployed environments' do
        expect(merge_request.environments_for(user)).to contain_exactly(source_environment)
      end

      context 'with environments on target project' do
        let(:target_environment) { create(:environment, project: project) }

        before do
          create(:deployment, environment: target_environment, tag: true, sha: merge_request.diff_head_sha)
        end

        it 'selects deployed environments' do
          expect(merge_request.environments_for(user)).to contain_exactly(source_environment, target_environment)
        end
      end
    end

    context 'without a diff_head_commit' do
      before do
        expect(merge_request).to receive(:diff_head_commit).and_return(nil)
      end

      it 'returns an empty array' do
        expect(merge_request.environments_for(user)).to be_empty
      end
    end
  end

  describe "#reload_diff" do
    let(:discussion) { create(:diff_note_on_merge_request, project: subject.project, noteable: subject).to_discussion }
    let(:commit) { subject.project.commit(sample_commit.id) }

    it "does not change existing merge request diff" do
      expect(subject.merge_request_diff).not_to receive(:save_git_content)
      subject.reload_diff
    end

    it "creates new merge request diff" do
      expect { subject.reload_diff }.to change { subject.merge_request_diffs.count }.by(1)
    end

    it "executs diff cache service" do
      expect_any_instance_of(MergeRequests::MergeRequestDiffCacheService).to receive(:execute).with(subject)

      subject.reload_diff
    end

    it "calls update_diff_discussion_positions" do
      expect(subject).to receive(:update_diff_discussion_positions)

      subject.reload_diff
    end

    context 'when using the after_update hook to update' do
      context 'when the branches are updated' do
        it 'uses the new heads to generate the diff' do
          expect { subject.update!(source_branch: subject.target_branch, target_branch: subject.source_branch) }
            .to change { subject.merge_request_diff.start_commit_sha }
            .and change { subject.merge_request_diff.head_commit_sha }
        end
      end
    end
  end

  describe '#update_diff_discussion_positions' do
    let(:discussion) { create(:diff_note_on_merge_request, project: subject.project, noteable: subject).to_discussion }
    let(:commit) { subject.project.commit(sample_commit.id) }
    let(:old_diff_refs) { subject.diff_refs }

    before do
      # Update merge_request_diff so that #diff_refs will return commit.diff_refs
      allow(subject).to receive(:create_merge_request_diff) do
        subject.merge_request_diffs.create(
          base_commit_sha: commit.parent_id,
          start_commit_sha: commit.parent_id,
          head_commit_sha: commit.sha
        )

        subject.merge_request_diff(true)
      end
    end

    it "updates diff discussion positions" do
      expect(Discussions::UpdateDiffPositionService).to receive(:new).with(
        subject.project,
        subject.author,
        old_diff_refs: old_diff_refs,
        new_diff_refs: commit.diff_refs,
        paths: discussion.position.paths
      ).and_call_original

      expect_any_instance_of(Discussions::UpdateDiffPositionService).to receive(:execute).with(discussion).and_call_original
      expect_any_instance_of(DiffNote).to receive(:save).once

      subject.update_diff_discussion_positions(old_diff_refs: old_diff_refs,
                                               new_diff_refs: commit.diff_refs,
                                               current_user: subject.author)
    end

    context 'when resolve_outdated_diff_discussions is set' do
      before do
        discussion

        subject.project.update!(resolve_outdated_diff_discussions: true)
      end

      it 'calls MergeRequests::ResolvedDiscussionNotificationService' do
        expect_any_instance_of(MergeRequests::ResolvedDiscussionNotificationService)
          .to receive(:execute).with(subject)

        subject.update_diff_discussion_positions(old_diff_refs: old_diff_refs,
                                                 new_diff_refs: commit.diff_refs,
                                                 current_user: subject.author)
      end
    end
  end

  describe '#branch_merge_base_commit' do
    context 'source and target branch exist' do
      it { expect(subject.branch_merge_base_commit.sha).to eq('ae73cb07c9eeaf35924a10f713b364d32b2dd34f') }
      it { expect(subject.branch_merge_base_commit).to be_a(Commit) }
    end

    context 'when the target branch does not exist' do
      before do
        subject.project.repository.rm_branch(subject.author, subject.target_branch)
        subject.clear_memoized_shas
      end

      it 'returns nil' do
        expect(subject.branch_merge_base_commit).to be_nil
      end
    end
  end

  describe "#diff_refs" do
    context "with diffs" do
      subject { create(:merge_request, :with_diffs) }

      it "does not touch the repository" do
        subject # Instantiate the object

        expect_any_instance_of(Repository).not_to receive(:commit)

        subject.diff_refs
      end

      it "returns expected diff_refs" do
        expected_diff_refs = Gitlab::Diff::DiffRefs.new(
          base_sha:  subject.merge_request_diff.base_commit_sha,
          start_sha: subject.merge_request_diff.start_commit_sha,
          head_sha:  subject.merge_request_diff.head_commit_sha
        )

        expect(subject.diff_refs).to eq(expected_diff_refs)
      end
    end
  end

  describe "#source_project_missing?" do
    let(:project)      { create(:project) }
    let(:forked_project) { fork_project(project) }
    let(:user)         { create(:user) }
    let(:unlink_project) { Projects::UnlinkForkService.new(forked_project, user) }

    context "when the fork exists" do
      let(:merge_request) do
        create(:merge_request,
          source_project: forked_project,
          target_project: project)
      end

      it { expect(merge_request.source_project_missing?).to be_falsey }
    end

    context "when the source project is the same as the target project" do
      let(:merge_request) { create(:merge_request, source_project: project) }

      it { expect(merge_request.source_project_missing?).to be_falsey }
    end

    context "when the fork does not exist" do
      let!(:merge_request) do
        create(:merge_request,
          source_project: forked_project,
          target_project: project)
      end

      it "returns true" do
        unlink_project.execute
        merge_request.reload

        expect(merge_request.source_project_missing?).to be_truthy
      end
    end
  end

  describe '#merge_ongoing?' do
    it 'returns true when the merge request is locked' do
      merge_request = build_stubbed(:merge_request, state: :locked)

      expect(merge_request.merge_ongoing?).to be(true)
    end

    it 'returns true when merge_id, MR is not merged and it has no running job' do
      merge_request = build_stubbed(:merge_request, state: :open, merge_jid: 'foo')
      allow(Gitlab::SidekiqStatus).to receive(:running?).with('foo') { true }

      expect(merge_request.merge_ongoing?).to be(true)
    end

    it 'returns false when merge_jid is nil' do
      merge_request = build_stubbed(:merge_request, state: :open, merge_jid: nil)

      expect(merge_request.merge_ongoing?).to be(false)
    end

    it 'returns false if MR is merged' do
      merge_request = build_stubbed(:merge_request, state: :merged, merge_jid: 'foo')

      expect(merge_request.merge_ongoing?).to be(false)
    end

    it 'returns false if there is no merge job running' do
      merge_request = build_stubbed(:merge_request, state: :open, merge_jid: 'foo')
      allow(Gitlab::SidekiqStatus).to receive(:running?).with('foo') { false }

      expect(merge_request.merge_ongoing?).to be(false)
    end
  end

  describe "#closed_without_fork?" do
    let(:project)      { create(:project) }
    let(:forked_project) { fork_project(project) }
    let(:user)         { create(:user) }
    let(:unlink_project) { Projects::UnlinkForkService.new(forked_project, user) }

    context "when the merge request is closed" do
      let(:closed_merge_request) do
        create(:closed_merge_request,
          source_project: forked_project,
          target_project: project)
      end

      it "returns false if the fork exist" do
        expect(closed_merge_request.closed_without_fork?).to be_falsey
      end

      it "returns true if the fork does not exist" do
        unlink_project.execute
        closed_merge_request.reload

        expect(closed_merge_request.closed_without_fork?).to be_truthy
      end
    end

    context "when the merge request is open" do
      let(:open_merge_request) do
        create(:merge_request,
          source_project: forked_project,
          target_project: project)
      end

      it "returns false" do
        expect(open_merge_request.closed_without_fork?).to be_falsey
      end
    end
  end

  describe '#reopenable?' do
    context 'when the merge request is closed' do
      it 'returns true' do
        subject.close

        expect(subject.reopenable?).to be_truthy
      end

      context 'forked project' do
        let(:project)      { create(:project, :public) }
        let(:user)         { create(:user) }
        let(:forked_project) { fork_project(project, user) }

        let!(:merge_request) do
          create(:closed_merge_request,
            source_project: forked_project,
            target_project: project)
        end

        it 'returns false if unforked' do
          Projects::UnlinkForkService.new(forked_project, user).execute

          expect(merge_request.reload.reopenable?).to be_falsey
        end

        it 'returns false if the source project is deleted' do
          Projects::DestroyService.new(forked_project, user).execute

          expect(merge_request.reload.reopenable?).to be_falsey
        end

        it 'returns false if the merge request is merged' do
          merge_request.update_attributes(state: 'merged')

          expect(merge_request.reload.reopenable?).to be_falsey
        end
      end
    end

    context 'when the merge request is opened' do
      it 'returns false' do
        expect(subject.reopenable?).to be_falsey
      end
    end
  end

  describe '#mergeable_with_quick_action?' do
    def create_pipeline(status)
      pipeline = create(:ci_pipeline_with_one_job,
        project: project,
        ref:     merge_request.source_branch,
        sha:     merge_request.diff_head_sha,
        status:  status,
        head_pipeline_of: merge_request)

      pipeline
    end

    let(:project)       { create(:project, :public, :repository, only_allow_merge_if_pipeline_succeeds: true) }
    let(:developer)     { create(:user) }
    let(:user)          { create(:user) }
    let(:merge_request) { create(:merge_request, source_project: project) }
    let(:mr_sha)        { merge_request.diff_head_sha }

    before do
      project.team << [developer, :developer]
    end

    context 'when autocomplete_precheck is set to true' do
      it 'is mergeable by developer' do
        expect(merge_request.mergeable_with_quick_action?(developer, autocomplete_precheck: true)).to be_truthy
      end

      it 'is not mergeable by normal user' do
        expect(merge_request.mergeable_with_quick_action?(user, autocomplete_precheck: true)).to be_falsey
      end
    end

    context 'when autocomplete_precheck is set to false' do
      it 'is mergeable by developer' do
        expect(merge_request.mergeable_with_quick_action?(developer, last_diff_sha: mr_sha)).to be_truthy
      end

      it 'is not mergeable by normal user' do
        expect(merge_request.mergeable_with_quick_action?(user, last_diff_sha: mr_sha)).to be_falsey
      end

      context 'closed MR'  do
        before do
          merge_request.update_attribute(:state, :closed)
        end

        it 'is not mergeable' do
          expect(merge_request.mergeable_with_quick_action?(developer, last_diff_sha: mr_sha)).to be_falsey
        end
      end

      context 'MR with WIP'  do
        before do
          merge_request.update_attribute(:title, 'WIP: some MR')
        end

        it 'is not mergeable' do
          expect(merge_request.mergeable_with_quick_action?(developer, last_diff_sha: mr_sha)).to be_falsey
        end
      end

      context 'sha differs from the MR diff_head_sha'  do
        it 'is not mergeable' do
          expect(merge_request.mergeable_with_quick_action?(developer, last_diff_sha: 'some other sha')).to be_falsey
        end
      end

      context 'sha is not provided'  do
        it 'is not mergeable' do
          expect(merge_request.mergeable_with_quick_action?(developer)).to be_falsey
        end
      end

      context 'with pipeline ok'  do
        before do
          create_pipeline(:success)
        end

        it 'is mergeable' do
          expect(merge_request.mergeable_with_quick_action?(developer, last_diff_sha: mr_sha)).to be_truthy
        end
      end

      context 'with failing pipeline'  do
        before do
          create_pipeline(:failed)
        end

        it 'is not mergeable' do
          expect(merge_request.mergeable_with_quick_action?(developer, last_diff_sha: mr_sha)).to be_falsey
        end
      end

      context 'with running pipeline'  do
        before do
          create_pipeline(:running)
        end

        it 'is mergeable' do
          expect(merge_request.mergeable_with_quick_action?(developer, last_diff_sha: mr_sha)).to be_truthy
        end
      end
    end
  end

  describe '#has_commits?' do
    before do
      allow(subject.merge_request_diff).to receive(:commits_count)
        .and_return(2)
    end

    it 'returns true when merge request diff has commits' do
      expect(subject.has_commits?).to be_truthy
    end
  end

  describe '#has_no_commits?' do
    before do
      allow(subject.merge_request_diff).to receive(:commits_count)
        .and_return(0)
    end

    it 'returns true when merge request diff has 0 commits' do
      expect(subject.has_no_commits?).to be_truthy
    end
  end

  describe '#merge_request_diff_for' do
    subject { create(:merge_request, importing: true) }
    let!(:merge_request_diff1) { subject.merge_request_diffs.create(head_commit_sha: '6f6d7e7ed97bb5f0054f2b1df789b39ca89b6ff9') }
    let!(:merge_request_diff2) { subject.merge_request_diffs.create(head_commit_sha: nil) }
    let!(:merge_request_diff3) { subject.merge_request_diffs.create(head_commit_sha: '5937ac0a7beb003549fc5fd26fc247adbce4a52e') }

    context 'with diff refs' do
      it 'returns the diffs' do
        expect(subject.merge_request_diff_for(merge_request_diff1.diff_refs)).to eq(merge_request_diff1)
      end
    end

    context 'with a commit SHA' do
      it 'returns the diffs' do
        expect(subject.merge_request_diff_for(merge_request_diff3.head_commit_sha)).to eq(merge_request_diff3)
      end
    end
  end

  describe '#version_params_for' do
    subject { create(:merge_request, importing: true) }
    let(:project) { subject.project }
    let!(:merge_request_diff1) { subject.merge_request_diffs.create(head_commit_sha: '6f6d7e7ed97bb5f0054f2b1df789b39ca89b6ff9') }
    let!(:merge_request_diff2) { subject.merge_request_diffs.create(head_commit_sha: nil) }
    let!(:merge_request_diff3) { subject.merge_request_diffs.create(head_commit_sha: '5937ac0a7beb003549fc5fd26fc247adbce4a52e') }

    context 'when the diff refs are for an older merge request version' do
      let(:diff_refs) { merge_request_diff1.diff_refs }

      it 'returns the diff ID for the version to show' do
        expect(subject.version_params_for(diff_refs)).to eq(diff_id: merge_request_diff1.id)
      end
    end

    context 'when the diff refs are for a comparison between merge request versions' do
      let(:diff_refs) { merge_request_diff3.compare_with(merge_request_diff1.head_commit_sha).diff_refs }

      it 'returns the diff ID and start sha of the versions to compare' do
        expect(subject.version_params_for(diff_refs)).to eq(diff_id: merge_request_diff3.id, start_sha: merge_request_diff1.head_commit_sha)
      end
    end

    context 'when the diff refs are not for a merge request version' do
      let(:diff_refs) { project.commit(sample_commit.id).diff_refs }

      it 'returns nil' do
        expect(subject.version_params_for(diff_refs)).to be_nil
      end
    end
  end

  describe '#fetch_ref!' do
    it 'fetches the ref correctly' do
      expect { subject.target_project.repository.delete_refs(subject.ref_path) }.not_to raise_error

      subject.fetch_ref!
      expect(subject.target_project.repository.ref_exists?(subject.ref_path)).to be_truthy
    end
  end

  describe 'removing a merge request' do
    it 'refreshes the number of open merge requests of the target project' do
      project = subject.target_project

      expect { subject.destroy }
        .to change { project.open_merge_requests_count }.from(1).to(0)
    end
  end

  it_behaves_like 'throttled touch' do
    subject { create(:merge_request, updated_at: 1.hour.ago) }
  end

  context 'state machine transitions' do
    describe '#unlock_mr' do
      subject { create(:merge_request, state: 'locked', merge_jid: 123) }

      it 'updates merge request head pipeline and sets merge_jid to nil' do
        pipeline = create(:ci_empty_pipeline, project: subject.project, ref: subject.source_branch, sha: subject.source_branch_sha)

        subject.unlock_mr

        subject.reload
        expect(subject.head_pipeline).to eq(pipeline)
        expect(subject.merge_jid).to be_nil
      end
    end
  end
end