Raw
1 #!/bin/sh
2
3 test_description='merge-recursive backend test'
4
5 GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=main
6 export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
7
8 . ./test-lib.sh
9
10 test_expect_success 'setup 1' '
11
12 echo hello >a &&
13 o0=$(git hash-object a) &&
14 cp a b &&
15 cp a c &&
16 mkdir d &&
17 cp a d/e &&
18
19 test_tick &&
20 git add a b c d/e &&
21 git commit -m initial &&
22 c0=$(git rev-parse --verify HEAD) &&
23 git branch side &&
24 git branch df-1 &&
25 git branch df-2 &&
26 git branch df-3 &&
27 git branch remove &&
28 git branch submod &&
29 git branch copy &&
30 git branch rename &&
31 git branch rename-ln &&
32
33 echo hello >>a &&
34 cp a d/e &&
35 o1=$(git hash-object a) &&
36
37 git add a d/e &&
38
39 test_tick &&
40 git commit -m "main modifies a and d/e" &&
41 c1=$(git rev-parse --verify HEAD) &&
42 ( git ls-tree -r HEAD && git ls-files -s ) >actual &&
43 (
44 echo "100644 blob $o1 a" &&
45 echo "100644 blob $o0 b" &&
46 echo "100644 blob $o0 c" &&
47 echo "100644 blob $o1 d/e" &&
48 echo "100644 $o1 0 a" &&
49 echo "100644 $o0 0 b" &&
50 echo "100644 $o0 0 c" &&
51 echo "100644 $o1 0 d/e"
52 ) >expected &&
53 test_cmp expected actual
54 '
55
56 test_expect_success 'setup 2' '
57
58 rm -rf [abcd] &&
59 git checkout side &&
60 ( git ls-tree -r HEAD && git ls-files -s ) >actual &&
61 (
62 echo "100644 blob $o0 a" &&
63 echo "100644 blob $o0 b" &&
64 echo "100644 blob $o0 c" &&
65 echo "100644 blob $o0 d/e" &&
66 echo "100644 $o0 0 a" &&
67 echo "100644 $o0 0 b" &&
68 echo "100644 $o0 0 c" &&
69 echo "100644 $o0 0 d/e"
70 ) >expected &&
71 test_cmp expected actual &&
72
73 echo goodbye >>a &&
74 o2=$(git hash-object a) &&
75
76 git add a &&
77
78 test_tick &&
79 git commit -m "side modifies a" &&
80 c2=$(git rev-parse --verify HEAD) &&
81 ( git ls-tree -r HEAD && git ls-files -s ) >actual &&
82 (
83 echo "100644 blob $o2 a" &&
84 echo "100644 blob $o0 b" &&
85 echo "100644 blob $o0 c" &&
86 echo "100644 blob $o0 d/e" &&
87 echo "100644 $o2 0 a" &&
88 echo "100644 $o0 0 b" &&
89 echo "100644 $o0 0 c" &&
90 echo "100644 $o0 0 d/e"
91 ) >expected &&
92 test_cmp expected actual
93 '
94
95 test_expect_success 'setup 3' '
96
97 rm -rf [abcd] &&
98 git checkout df-1 &&
99 ( git ls-tree -r HEAD && git ls-files -s ) >actual &&
100 (
101 echo "100644 blob $o0 a" &&
102 echo "100644 blob $o0 b" &&
103 echo "100644 blob $o0 c" &&
104 echo "100644 blob $o0 d/e" &&
105 echo "100644 $o0 0 a" &&
106 echo "100644 $o0 0 b" &&
107 echo "100644 $o0 0 c" &&
108 echo "100644 $o0 0 d/e"
109 ) >expected &&
110 test_cmp expected actual &&
111
112 rm -f b && mkdir b && echo df-1 >b/c && git add b/c &&
113 o3=$(git hash-object b/c) &&
114
115 test_tick &&
116 git commit -m "df-1 makes b/c" &&
117 c3=$(git rev-parse --verify HEAD) &&
118 ( git ls-tree -r HEAD && git ls-files -s ) >actual &&
119 (
120 echo "100644 blob $o0 a" &&
121 echo "100644 blob $o3 b/c" &&
122 echo "100644 blob $o0 c" &&
123 echo "100644 blob $o0 d/e" &&
124 echo "100644 $o0 0 a" &&
125 echo "100644 $o3 0 b/c" &&
126 echo "100644 $o0 0 c" &&
127 echo "100644 $o0 0 d/e"
128 ) >expected &&
129 test_cmp expected actual
130 '
131
132 test_expect_success 'setup 4' '
133
134 rm -rf [abcd] &&
135 git checkout df-2 &&
136 ( git ls-tree -r HEAD && git ls-files -s ) >actual &&
137 (
138 echo "100644 blob $o0 a" &&
139 echo "100644 blob $o0 b" &&
140 echo "100644 blob $o0 c" &&
141 echo "100644 blob $o0 d/e" &&
142 echo "100644 $o0 0 a" &&
143 echo "100644 $o0 0 b" &&
144 echo "100644 $o0 0 c" &&
145 echo "100644 $o0 0 d/e"
146 ) >expected &&
147 test_cmp expected actual &&
148
149 rm -f a && mkdir a && echo df-2 >a/c && git add a/c &&
150 o4=$(git hash-object a/c) &&
151
152 test_tick &&
153 git commit -m "df-2 makes a/c" &&
154 c4=$(git rev-parse --verify HEAD) &&
155 ( git ls-tree -r HEAD && git ls-files -s ) >actual &&
156 (
157 echo "100644 blob $o4 a/c" &&
158 echo "100644 blob $o0 b" &&
159 echo "100644 blob $o0 c" &&
160 echo "100644 blob $o0 d/e" &&
161 echo "100644 $o4 0 a/c" &&
162 echo "100644 $o0 0 b" &&
163 echo "100644 $o0 0 c" &&
164 echo "100644 $o0 0 d/e"
165 ) >expected &&
166 test_cmp expected actual
167 '
168
169 test_expect_success 'setup 5' '
170
171 rm -rf [abcd] &&
172 git checkout remove &&
173 ( git ls-tree -r HEAD && git ls-files -s ) >actual &&
174 (
175 echo "100644 blob $o0 a" &&
176 echo "100644 blob $o0 b" &&
177 echo "100644 blob $o0 c" &&
178 echo "100644 blob $o0 d/e" &&
179 echo "100644 $o0 0 a" &&
180 echo "100644 $o0 0 b" &&
181 echo "100644 $o0 0 c" &&
182 echo "100644 $o0 0 d/e"
183 ) >expected &&
184 test_cmp expected actual &&
185
186 rm -f b &&
187 echo remove-conflict >a &&
188
189 git add a &&
190 git rm b &&
191 o5=$(git hash-object a) &&
192
193 test_tick &&
194 git commit -m "remove removes b and modifies a" &&
195 c5=$(git rev-parse --verify HEAD) &&
196 ( git ls-tree -r HEAD && git ls-files -s ) >actual &&
197 (
198 echo "100644 blob $o5 a" &&
199 echo "100644 blob $o0 c" &&
200 echo "100644 blob $o0 d/e" &&
201 echo "100644 $o5 0 a" &&
202 echo "100644 $o0 0 c" &&
203 echo "100644 $o0 0 d/e"
204 ) >expected &&
205 test_cmp expected actual
206
207 '
208
209 test_expect_success 'setup 6' '
210
211 rm -rf [abcd] &&
212 git checkout df-3 &&
213 ( git ls-tree -r HEAD && git ls-files -s ) >actual &&
214 (
215 echo "100644 blob $o0 a" &&
216 echo "100644 blob $o0 b" &&
217 echo "100644 blob $o0 c" &&
218 echo "100644 blob $o0 d/e" &&
219 echo "100644 $o0 0 a" &&
220 echo "100644 $o0 0 b" &&
221 echo "100644 $o0 0 c" &&
222 echo "100644 $o0 0 d/e"
223 ) >expected &&
224 test_cmp expected actual &&
225
226 rm -fr d && echo df-3 >d && git add d &&
227 o6=$(git hash-object d) &&
228
229 test_tick &&
230 git commit -m "df-3 makes d" &&
231 c6=$(git rev-parse --verify HEAD) &&
232 ( git ls-tree -r HEAD && git ls-files -s ) >actual &&
233 (
234 echo "100644 blob $o0 a" &&
235 echo "100644 blob $o0 b" &&
236 echo "100644 blob $o0 c" &&
237 echo "100644 blob $o6 d" &&
238 echo "100644 $o0 0 a" &&
239 echo "100644 $o0 0 b" &&
240 echo "100644 $o0 0 c" &&
241 echo "100644 $o6 0 d"
242 ) >expected &&
243 test_cmp expected actual
244 '
245
246 test_expect_success 'setup 7' '
247
248 git checkout submod &&
249 git rm d/e &&
250 test_tick &&
251 git commit -m "remove d/e" &&
252 git update-index --add --cacheinfo 160000 $c1 d &&
253 test_tick &&
254 git commit -m "make d/ a submodule"
255 '
256
257 test_expect_success 'setup 8' '
258 git checkout rename &&
259 git mv a e &&
260 git add e &&
261 test_tick &&
262 git commit -m "rename a->e" &&
263 c7=$(git rev-parse --verify HEAD) &&
264 git checkout rename-ln &&
265 git mv a e &&
266 test_ln_s_add e a &&
267 test_tick &&
268 git commit -m "rename a->e, symlink a->e" &&
269 oln=$(printf e | git hash-object --stdin)
270 '
271
272 test_expect_success 'setup 9' '
273 git checkout copy &&
274 cp a e &&
275 git add e &&
276 test_tick &&
277 git commit -m "copy a->e"
278 '
279
280 test_expect_success 'merge-recursive simple' '
281
282 rm -fr [abcd] &&
283 git checkout -f "$c2" &&
284
285 test_expect_code 1 git merge-recursive "$c0" -- "$c2" "$c1"
286 '
287
288 test_expect_success 'merge-recursive result' '
289
290 git ls-files -s >actual &&
291 (
292 echo "100644 $o0 1 a" &&
293 echo "100644 $o2 2 a" &&
294 echo "100644 $o1 3 a" &&
295 echo "100644 $o0 0 b" &&
296 echo "100644 $o0 0 c" &&
297 echo "100644 $o1 0 d/e"
298 ) >expected &&
299 test_cmp expected actual
300
301 '
302
303 test_expect_success 'fail if the index has unresolved entries' '
304
305 rm -fr [abcd] &&
306 git checkout -f "$c1" &&
307
308 test_must_fail git merge "$c5" &&
309 test_must_fail git merge "$c5" 2> out &&
310 test_grep "not possible because you have unmerged files" out &&
311 git add -u &&
312 test_must_fail git merge "$c5" 2> out &&
313 test_grep "You have not concluded your merge" out &&
314 rm -f .git/MERGE_HEAD &&
315 test_must_fail git merge "$c5" 2> out &&
316 test_grep "Your local changes to the following files would be overwritten by merge:" out
317 '
318
319 test_expect_success 'merge-recursive remove conflict' '
320
321 rm -fr [abcd] &&
322 git checkout -f "$c1" &&
323
324 test_expect_code 1 git merge-recursive "$c0" -- "$c1" "$c5"
325 '
326
327 test_expect_success 'merge-recursive remove conflict' '
328
329 git ls-files -s >actual &&
330 (
331 echo "100644 $o0 1 a" &&
332 echo "100644 $o1 2 a" &&
333 echo "100644 $o5 3 a" &&
334 echo "100644 $o0 0 c" &&
335 echo "100644 $o1 0 d/e"
336 ) >expected &&
337 test_cmp expected actual
338
339 '
340
341 test_expect_success 'merge-recursive d/f simple' '
342 rm -fr [abcd] &&
343 git reset --hard &&
344 git checkout -f "$c1" &&
345
346 git merge-recursive "$c0" -- "$c1" "$c3"
347 '
348
349 test_expect_success 'merge-recursive result' '
350
351 git ls-files -s >actual &&
352 (
353 echo "100644 $o1 0 a" &&
354 echo "100644 $o3 0 b/c" &&
355 echo "100644 $o0 0 c" &&
356 echo "100644 $o1 0 d/e"
357 ) >expected &&
358 test_cmp expected actual
359
360 '
361
362 test_expect_success 'merge-recursive d/f conflict' '
363
364 rm -fr [abcd] &&
365 git reset --hard &&
366 git checkout -f "$c1" &&
367
368 test_expect_code 1 git merge-recursive "$c0" -- "$c1" "$c4"
369 '
370
371 test_expect_success 'merge-recursive d/f conflict result' '
372
373 git ls-files -s >actual &&
374 (
375 echo "100644 $o4 0 a/c" &&
376 echo "100644 $o0 1 a~$c1" &&
377 echo "100644 $o1 2 a~$c1" &&
378 echo "100644 $o0 0 b" &&
379 echo "100644 $o0 0 c" &&
380 echo "100644 $o1 0 d/e"
381 ) >expected &&
382 test_cmp expected actual
383
384 '
385
386 test_expect_success 'merge-recursive d/f conflict the other way' '
387
388 rm -fr [abcd] &&
389 git reset --hard &&
390 git checkout -f "$c4" &&
391
392 test_expect_code 1 git merge-recursive "$c0" -- "$c4" "$c1"
393 '
394
395 test_expect_success 'merge-recursive d/f conflict result the other way' '
396
397 git ls-files -s >actual &&
398 (
399 echo "100644 $o4 0 a/c" &&
400 echo "100644 $o0 1 a~$c1" &&
401 echo "100644 $o1 3 a~$c1" &&
402 echo "100644 $o0 0 b" &&
403 echo "100644 $o0 0 c" &&
404 echo "100644 $o1 0 d/e"
405 ) >expected &&
406 test_cmp expected actual
407
408 '
409
410 test_expect_success 'merge-recursive d/f conflict' '
411
412 rm -fr [abcd] &&
413 git reset --hard &&
414 git checkout -f "$c1" &&
415
416 test_expect_code 1 git merge-recursive "$c0" -- "$c1" "$c6"
417 '
418
419 test_expect_success 'merge-recursive d/f conflict result' '
420
421 git ls-files -s >actual &&
422 (
423 echo "100644 $o1 0 a" &&
424 echo "100644 $o0 0 b" &&
425 echo "100644 $o0 0 c" &&
426 echo "100644 $o0 1 d/e" &&
427 echo "100644 $o1 2 d/e" &&
428 echo "100644 $o6 3 d~$c6"
429 ) >expected &&
430 test_cmp expected actual
431
432 '
433
434 test_expect_success 'merge-recursive d/f conflict' '
435
436 rm -fr [abcd] &&
437 git reset --hard &&
438 git checkout -f "$c6" &&
439
440 test_expect_code 1 git merge-recursive "$c0" -- "$c6" "$c1"
441 '
442
443 test_expect_success 'merge-recursive d/f conflict result' '
444
445 git ls-files -s >actual &&
446 (
447 echo "100644 $o1 0 a" &&
448 echo "100644 $o0 0 b" &&
449 echo "100644 $o0 0 c" &&
450 echo "100644 $o0 1 d/e" &&
451 echo "100644 $o1 3 d/e" &&
452 echo "100644 $o6 2 d~$c6"
453 ) >expected &&
454 test_cmp expected actual
455
456 '
457
458 test_expect_success SYMLINKS 'dir in working tree with symlink ancestor does not produce d/f conflict' '
459 git init sym &&
460 (
461 cd sym &&
462 ln -s . foo &&
463 mkdir bar &&
464 >bar/file &&
465 git add foo bar/file &&
466 git commit -m "foo symlink" &&
467
468 git checkout -b branch1 &&
469 git commit --allow-empty -m "empty commit" &&
470
471 git checkout main &&
472 git rm foo &&
473 mkdir foo &&
474 >foo/bar &&
475 git add foo/bar &&
476 git commit -m "replace foo symlink with real foo dir and foo/bar file" &&
477
478 git checkout branch1 &&
479
480 git cherry-pick main &&
481 test_path_is_dir foo &&
482 test_path_is_file foo/bar
483 )
484 '
485
486 test_expect_success 'reset and 3-way merge' '
487
488 git reset --hard "$c2" &&
489 git read-tree -m "$c0" "$c2" "$c1"
490
491 '
492
493 test_expect_success 'reset and bind merge' '
494
495 git reset --hard main &&
496 git read-tree --prefix=M/ main &&
497 git ls-files -s >actual &&
498 (
499 echo "100644 $o1 0 M/a" &&
500 echo "100644 $o0 0 M/b" &&
501 echo "100644 $o0 0 M/c" &&
502 echo "100644 $o1 0 M/d/e" &&
503 echo "100644 $o1 0 a" &&
504 echo "100644 $o0 0 b" &&
505 echo "100644 $o0 0 c" &&
506 echo "100644 $o1 0 d/e"
507 ) >expected &&
508 test_cmp expected actual &&
509
510 git read-tree --prefix=a1/ main &&
511 git ls-files -s >actual &&
512 (
513 echo "100644 $o1 0 M/a" &&
514 echo "100644 $o0 0 M/b" &&
515 echo "100644 $o0 0 M/c" &&
516 echo "100644 $o1 0 M/d/e" &&
517 echo "100644 $o1 0 a" &&
518 echo "100644 $o1 0 a1/a" &&
519 echo "100644 $o0 0 a1/b" &&
520 echo "100644 $o0 0 a1/c" &&
521 echo "100644 $o1 0 a1/d/e" &&
522 echo "100644 $o0 0 b" &&
523 echo "100644 $o0 0 c" &&
524 echo "100644 $o1 0 d/e"
525 ) >expected &&
526 test_cmp expected actual &&
527
528 git read-tree --prefix=z/ main &&
529 git ls-files -s >actual &&
530 (
531 echo "100644 $o1 0 M/a" &&
532 echo "100644 $o0 0 M/b" &&
533 echo "100644 $o0 0 M/c" &&
534 echo "100644 $o1 0 M/d/e" &&
535 echo "100644 $o1 0 a" &&
536 echo "100644 $o1 0 a1/a" &&
537 echo "100644 $o0 0 a1/b" &&
538 echo "100644 $o0 0 a1/c" &&
539 echo "100644 $o1 0 a1/d/e" &&
540 echo "100644 $o0 0 b" &&
541 echo "100644 $o0 0 c" &&
542 echo "100644 $o1 0 d/e" &&
543 echo "100644 $o1 0 z/a" &&
544 echo "100644 $o0 0 z/b" &&
545 echo "100644 $o0 0 z/c" &&
546 echo "100644 $o1 0 z/d/e"
547 ) >expected &&
548 test_cmp expected actual
549
550 '
551
552 test_expect_success 'merge-recursive w/ empty work tree - ours has rename' '
553 (
554 GIT_WORK_TREE="$PWD/ours-has-rename-work" &&
555 export GIT_WORK_TREE &&
556 GIT_INDEX_FILE="$PWD/ours-has-rename-index" &&
557 export GIT_INDEX_FILE &&
558 mkdir "$GIT_WORK_TREE" &&
559 git read-tree -i -m $c7 2>actual-err &&
560 test_must_be_empty actual-err &&
561 git update-index --ignore-missing --refresh 2>actual-err &&
562 test_must_be_empty actual-err &&
563 git merge-recursive $c0 -- $c7 $c3 2>actual-err &&
564 test_must_be_empty actual-err &&
565 git ls-files -s >actual-files 2>actual-err &&
566 test_must_be_empty actual-err
567 ) &&
568 cat >expected-files <<-EOF &&
569 100644 $o3 0 b/c
570 100644 $o0 0 c
571 100644 $o0 0 d/e
572 100644 $o0 0 e
573 EOF
574 test_cmp expected-files actual-files
575 '
576
577 test_expect_success 'merge-recursive w/ empty work tree - theirs has rename' '
578 (
579 GIT_WORK_TREE="$PWD/theirs-has-rename-work" &&
580 export GIT_WORK_TREE &&
581 GIT_INDEX_FILE="$PWD/theirs-has-rename-index" &&
582 export GIT_INDEX_FILE &&
583 mkdir "$GIT_WORK_TREE" &&
584 git read-tree -i -m $c3 2>actual-err &&
585 test_must_be_empty actual-err &&
586 git update-index --ignore-missing --refresh 2>actual-err &&
587 test_must_be_empty actual-err &&
588 git merge-recursive $c0 -- $c3 $c7 2>actual-err &&
589 test_must_be_empty actual-err &&
590 git ls-files -s >actual-files 2>actual-err &&
591 test_must_be_empty actual-err
592 ) &&
593 cat >expected-files <<-EOF &&
594 100644 $o3 0 b/c
595 100644 $o0 0 c
596 100644 $o0 0 d/e
597 100644 $o0 0 e
598 EOF
599 test_cmp expected-files actual-files
600 '
601
602 test_expect_success 'merge removes empty directories' '
603
604 git reset --hard main &&
605 git checkout -b rm &&
606 git rm d/e &&
607 git commit -mremoved-d/e &&
608 git checkout main &&
609 git merge -s recursive rm &&
610 test_path_is_missing d
611 '
612
613 test_expect_success 'merge-recursive simple w/submodule' '
614
615 git checkout submod &&
616 git merge remove
617 '
618
619 test_expect_success 'merge-recursive simple w/submodule result' '
620
621 git ls-files -s >actual &&
622 (
623 echo "100644 $o5 0 a" &&
624 echo "100644 $o0 0 c" &&
625 echo "160000 $c1 0 d"
626 ) >expected &&
627 test_cmp expected actual
628 '
629
630 test_expect_success 'merge-recursive copy vs. rename' '
631 git checkout -f copy &&
632 git merge rename &&
633 ( git ls-tree -r HEAD && git ls-files -s ) >actual &&
634 (
635 echo "100644 blob $o0 b" &&
636 echo "100644 blob $o0 c" &&
637 echo "100644 blob $o0 d/e" &&
638 echo "100644 blob $o0 e" &&
639 echo "100644 $o0 0 b" &&
640 echo "100644 $o0 0 c" &&
641 echo "100644 $o0 0 d/e" &&
642 echo "100644 $o0 0 e"
643 ) >expected &&
644 test_cmp expected actual
645 '
646
647 test_expect_success 'merge-recursive rename vs. rename/symlink' '
648
649 git checkout -f rename &&
650 git merge rename-ln &&
651 ( git ls-tree -r HEAD && git ls-files -s ) >actual &&
652 (
653 echo "120000 blob $oln a" &&
654 echo "100644 blob $o0 b" &&
655 echo "100644 blob $o0 c" &&
656 echo "100644 blob $o0 d/e" &&
657 echo "100644 blob $o0 e" &&
658 echo "120000 $oln 0 a" &&
659 echo "100644 $o0 0 b" &&
660 echo "100644 $o0 0 c" &&
661 echo "100644 $o0 0 d/e" &&
662 echo "100644 $o0 0 e"
663 ) >expected &&
664 test_cmp expected actual
665 '
666
667 test_expect_success 'merging with triple rename across D/F conflict' '
668 git reset --hard HEAD &&
669 git checkout -b topic &&
670 git rm -rf . &&
671
672 echo "just a file" >sub1 &&
673 mkdir -p sub2 &&
674 echo content1 >sub2/file1 &&
675 echo content2 >sub2/file2 &&
676 echo content3 >sub2/file3 &&
677 mkdir simple &&
678 echo base >simple/bar &&
679 git add -A &&
680 test_tick &&
681 git commit -m base &&
682
683 git checkout -b other &&
684 echo more >>simple/bar &&
685 test_tick &&
686 git commit -a -m changesimplefile &&
687
688 git checkout topic &&
689 git rm sub1 &&
690 git mv sub2 sub1 &&
691 test_tick &&
692 git commit -m changefiletodir &&
693
694 test_tick &&
695 git merge other
696 '
697
698 test_expect_success 'merge-recursive internal merge resolves to the sameness' '
699 git reset --hard HEAD &&
700
701 # We are going to create a history leading to two criss-cross
702 # branches A and B. The common ancestor at the bottom, O0,
703 # has two child commits O1 and O2, both of which will be merge
704 # base between A and B, like so:
705 #
706 # O1---A
707 # / \ /
708 # O0 .
709 # \ / \
710 # O2---B
711 #
712 # The recently added "check to see if the index is different from
713 # the tree into which something else is getting merged" check must
714 # NOT kick in when an inner merge between O1 and O2 is made. Both
715 # O1 and O2 happen to have the same tree as O0 in this test to
716 # trigger the bug---whether the inner merge is made by merging O2
717 # into O1 or O1 into O2, their common ancestor O0 and the branch
718 # being merged have the same tree. We should not trigger the "is
719 # the index dirty?" check in this case.
720
721 echo "zero" >file &&
722 git add file &&
723 test_tick &&
724 git commit -m "O0" &&
725 O0=$(git rev-parse HEAD) &&
726
727 test_tick &&
728 git commit --allow-empty -m "O1" &&
729 O1=$(git rev-parse HEAD) &&
730
731 git reset --hard $O0 &&
732 test_tick &&
733 git commit --allow-empty -m "O2" &&
734 O2=$(git rev-parse HEAD) &&
735
736 test_tick &&
737 git merge -s ours $O1 &&
738 B=$(git rev-parse HEAD) &&
739
740 git reset --hard $O1 &&
741 test_tick &&
742 git merge -s ours $O2 &&
743 A=$(git rev-parse HEAD) &&
744
745 git merge $B
746 '
747
748 test_done