[PATCH 10/30] directory rename detection: more involved edge/corner testcases
Signed-off-by: Elijah Newren <newren@gmail.com>
---
t/t6043-merge-rename-directories.sh | 347 ++++++++++++++++++++++++++++++++++++
1 file changed, 347 insertions(+)
diff --git a/t/t6043-merge-rename-directories.sh b/t/t6043-merge-rename-directories.sh
index 157299105f..115d0d2622 100755
--- a/t/t6043-merge-rename-directories.sh
+++ b/t/t6043-merge-rename-directories.sh
@@ -1336,4 +1336,351 @@ test_expect_success '6e-check: Add/add from one side' '
test $(git rev-parse HEAD:z/d) = $(git rev-parse C:z/d)
'
+
+###########################################################################
+# SECTION 7: More involved Edge/Corner cases
+#
+# The ruleset we have generated in the above sections seems to provide
+# well-defined merges. But can we find edge/corner cases that either (a)
+# are harder for users to understand, or (b) have a resolution that is
+# non-intuitive or suboptimal?
+#
+# The testcases in this section dive into cases that I've tried to craft in
+# a way to find some that might be surprising to users or difficult for
+# them to understand (the next section will look at non-intuitive or
+# suboptimal merge results). Some of the testcases are similar to ones
+# from past sections, but have been simplified to try to highlight error
+# messages using a "modified" path (due to the directory rename). Are
+# users okay with these?
+#
+# In my opinion, testcases that are difficult to understand from this
+# section is due to difficulty in the testcase rather than the directory
+# renaming (similar to how t6042 and t6036 have difficult resolutions due
+# to the problem setup itself being complex). And I don't think the
+# error messages are a problem.
+#
+# On the other hand, the testcases in section 8 worry me slightly more...
+###########################################################################
+
+# Testcase 7a, rename-dir vs. rename-dir (NOT split evenly) PLUS add-other-file
+# Commit A: z/{b,c}
+# Commit B: y/{b,c}
+# Commit C: w/b, x/c, z/d
+# Expected: y/d, CONFLICT(rename/rename for both z/b and z/c)
+# NOTE: There's a rename of z/ here, y/ has more renames, so z/d -> y/d.
+
+test_expect_success '7a-setup: rename-dir vs. rename-dir (NOT split evenly) PLUS add-other-file' '
+ git rm -rf . &&
+ git clean -fdqx &&
+ rm -rf .git &&
+ git init &&
+
+ mkdir z &&
+ echo b >z/b &&
+ echo c >z/c &&
+ git add z &&
+ test_tick &&
+ git commit -m "A" &&
+
+ git branch A &&
+ git branch B &&
+ git branch C &&
+
+ git checkout B &&
+ git mv z y &&
+ test_tick &&
+ git commit -m "B" &&
+
+ git checkout C &&
+ mkdir w &&
+ mkdir x &&
+ git mv z/b w/ &&
+ git mv z/c x/ &&
+ echo d > z/d &&
+ git add z/d &&
+ test_tick &&
+ git commit -m "C"
+'
+
+test_expect_failure '7a-check: rename-dir vs. rename-dir (NOT split evenly) PLUS add-other-file' '
+ git checkout B^0 &&
+
+ test_must_fail git merge -s recursive C^0 >out &&
+ test_i18ngrep "CONFLICT (rename/rename).*z/b.*y/b.*w/b" out &&
+ test_i18ngrep "CONFLICT (rename/rename).*z/c.*y/c.*x/c" out &&
+
+ test 7 -eq $(git ls-files -s | wc -l) &&
+ test 6 -eq $(git ls-files -u | wc -l) &&
+ test 1 -eq $(git ls-files -o | wc -l) &&
+
+ test $(git rev-parse :0:y/d) = $(git rev-parse C:z/d) &&
+
+ test $(git rev-parse :1:z/b) = $(git rev-parse A:z/b) &&
+ test $(git rev-parse :2:y/b) = $(git rev-parse A:z/b) &&
+ test $(git rev-parse :3:w/b) = $(git rev-parse A:z/b) &&
+
+ test $(git rev-parse :1:z/c) = $(git rev-parse A:z/c) &&
+ test $(git rev-parse :2:y/c) = $(git rev-parse A:z/c) &&
+ test $(git rev-parse :3:x/c) = $(git rev-parse A:z/c) &&
+
+ test $(git hash-object y/b) = $(git rev-parse A:z/b) &&
+ test $(git hash-object w/b) = $(git rev-parse A:z/b) &&
+ test $(git hash-object y/c) = $(git rev-parse A:z/c) &&
+ test $(git hash-object x/c) = $(git rev-parse A:z/c)
+'
+
+# Testcase 7b, rename/rename(2to1), but only due to transitive rename
+# (Related to testcase 1d)
+# Commit A: z/{b,c}, x/d_1, w/d_2
+# Commit B: y/{b,c,d_2}, x/d_1
+# Commit C: z/{b,c,d_1}, w/d_2
+# Expected: y/{b,c}, CONFLICT(rename/rename(2to1): x/d_1, w/d_2 -> y_d)
+
+test_expect_success '7b-setup: rename/rename(2to1), but only due to transitive rename' '
+ git rm -rf . &&
+ git clean -fdqx &&
+ rm -rf .git &&
+ git init &&
+
+ mkdir z &&
+ mkdir x &&
+ mkdir w &&
+ echo b >z/b &&
+ echo c >z/c &&
+ echo d1 > x/d &&
+ echo d2 > w/d &&
+ git add z x w &&
+ test_tick &&
+ git commit -m "A" &&
+
+ git branch A &&
+ git branch B &&
+ git branch C &&
+
+ git checkout B &&
+ git mv z y &&
+ git mv w/d y/ &&
+ test_tick &&
+ git commit -m "B" &&
+
+ git checkout C &&
+ git mv x/d z/ &&
+ rmdir x &&
+ test_tick &&
+ git commit -m "C"
+'
+
+test_expect_failure '7b-check: rename/rename(2to1), but only due to transitive rename' '
+ git checkout B^0 &&
+
+ test_must_fail git merge -s recursive C^0 >out &&
+ test_i18ngrep "CONFLICT (rename/rename)" out &&
+
+ test 4 -eq $(git ls-files -s | wc -l) &&
+ test 2 -eq $(git ls-files -u | wc -l) &&
+ test 3 -eq $(git ls-files -o | wc -l) &&
+
+ test $(git rev-parse :0:y/b) = $(git rev-parse A:z/b) &&
+ test $(git rev-parse :0:y/c) = $(git rev-parse A:z/c) &&
+
+ test $(git rev-parse :2:y/d) = $(git rev-parse A:w/d) &&
+ test $(git rev-parse :3:y/d) = $(git rev-parse A:x/d) &&
+
+ test ! -f y/d &&
+ test -f y/d~HEAD &&
+ test -f y/d~C^0 &&
+
+ test $(git hash-object y/d~HEAD) = $(git rev-parse A:w/d) &&
+ test $(git hash-object y/d~C^0) = $(git rev-parse A:x/d)
+'
+
+# Testcase 7c, rename/rename(1to...2or3); transitive rename may add complexity
+# (Related to testcases 3b and 5c)
+# Commit A: z/{b,c}, x/d
+# Commit B: y/{b,c}, w/d
+# Commit C: z/{b,c,d}
+# Expected: y/{b,c}, CONFLICT(x/d -> w/d vs. y/d)
+# NOTE: z/ was renamed to y/ so we do not want to report
+# either CONFLICT(x/d -> w/d vs. z/d)
+# or CONFLiCT x/d -> w/d vs. y/d vs. z/d)
+
+test_expect_success '7c-setup: rename/rename(1to...2or3); transitive rename may add complexity' '
+ git rm -rf . &&
+ git clean -fdqx &&
+ rm -rf .git &&
+ git init &&
+
+ mkdir z &&
+ echo b >z/b &&
+ echo c >z/c &&
+ mkdir x &&
+ echo d >x/d &&
+ git add z x &&
+ test_tick &&
+ git commit -m "A" &&
+
+ git branch A &&
+ git branch B &&
+ git branch C &&
+
+ git checkout B &&
+ git mv z y &&
+ git mv x w &&
+ test_tick &&
+ git commit -m "B" &&
+
+ git checkout C &&
+ git mv x/d z/ &&
+ rmdir x &&
+ test_tick &&
+ git commit -m "C"
+'
+
+test_expect_failure '7c-check: rename/rename(1to...2or3); transitive rename may add complexity' '
+ git checkout B^0 &&
+
+ test_must_fail git merge -s recursive C^0 >out &&
+ test_i18ngrep "CONFLICT (rename/rename).*x/d.*w/d.*y/d" out &&
+
+ test 5 -eq $(git ls-files -s | wc -l) &&
+ test 3 -eq $(git ls-files -u | wc -l) &&
+ test 1 -eq $(git ls-files -o | wc -l) &&
+
+ test $(git rev-parse :0:y/b) = $(git rev-parse A:z/b) &&
+ test $(git rev-parse :0:y/c) = $(git rev-parse A:z/c) &&
+
+ test $(git rev-parse :1:x/d) = $(git rev-parse A:x/d) &&
+ test $(git rev-parse :2:w/d) = $(git rev-parse A:x/d) &&
+ test $(git rev-parse :3:y/d) = $(git rev-parse A:x/d)
+'
+
+# Testcase 7d, transitive rename involved in rename/delete; how is it reported?
+# (Related somewhat to testcases 5b and 8d)
+# Commit A: z/{b,c}, x/d
+# Commit B: y/{b,c}
+# Commit C: z/{b,c,d}
+# Expected: y/{b,c}, CONFLICT(delete x/d vs rename to y/d)
+# NOTE: z->y so NOT CONFLICT(delete x/d vs rename to z/d)
+
+test_expect_success '7d-setup: transitive rename involved in rename/delete; how is it reported?' '
+ git rm -rf . &&
+ git clean -fdqx &&
+ rm -rf .git &&
+ git init &&
+
+ mkdir z &&
+ echo b >z/b &&
+ echo c >z/c &&
+ mkdir x &&
+ echo d >x/d &&
+ git add z x &&
+ test_tick &&
+ git commit -m "A" &&
+
+ git branch A &&
+ git branch B &&
+ git branch C &&
+
+ git checkout B &&
+ git mv z y &&
+ git rm -rf x &&
+ test_tick &&
+ git commit -m "B" &&
+
+ git checkout C &&
+ git mv x/d z/ &&
+ rmdir x &&
+ test_tick &&
+ git commit -m "C"
+'
+
+test_expect_failure '7d-check: transitive rename involved in rename/delete; how is it reported?' '
+ git checkout B^0 &&
+
+ test_must_fail git merge -s recursive C^0 >out &&
+ test_i18ngrep "CONFLICT (rename/delete).*x/d.*y/d" out &&
+
+ test 3 -eq $(git ls-files -s | wc -l) &&
+ test 1 -eq $(git ls-files -u | wc -l) &&
+ test 1 -eq $(git ls-files -o | wc -l) &&
+
+ test $(git rev-parse :0:y/b) = $(git rev-parse A:z/b) &&
+ test $(git rev-parse :0:y/c) = $(git rev-parse A:z/c) &&
+ test $(git rev-parse :3:y/d) = $(git rev-parse A:x/d)
+'
+
+# Testcase 7e, transitive rename in rename/delete AND dirs in the way
+# (Very similar to 'both rename source and destination involved in D/F conflict' from t6022-merge-rename.sh)
+# (Also related to testcases 9c and 9d)
+# Commit A: z/{b,c}, x/d_1
+# Commit B: y/{b,c,d/g}, x/d/f
+# Commit C: z/{b,c,d_1}
+# Expected: rename/delete(x/d_1->y/d_1 vs. None) + D/F conflict on y/d
+# y/{b,c,d/g}, y/d_1~C^0, x/d/f
+# NOTE: x/d/f may be slightly confusing here. x/d_1 -> z/d_1 implies
+# there is a directory rename from x/ -> z/, performed by commit C.
+# However, on the side of commit B, it renamed z/ -> y/, thus
+# making a rename from x/ -> z/ when it was getting rid of z/ seems
+# non-sensical. Further, putting x/d/f into y/d/f also doesn't
+# make a lot of sense because commit B did the renaming of z to y
+# and it created x/d/f, and it clearly made these things separate,
+# so it doesn't make much sense to push these together.
+
+test_expect_success '7e-setup: transitive rename in rename/delete AND dirs in the way' '
+ git rm -rf . &&
+ git clean -fdqx &&
+ rm -rf .git &&
+ git init &&
+
+ mkdir z &&
+ echo b >z/b &&
+ echo c >z/c &&
+ mkdir x &&
+ echo d1 >x/d &&
+ git add z x &&
+ test_tick &&
+ git commit -m "A" &&
+
+ git branch A &&
+ git branch B &&
+ git branch C &&
+
+ git checkout B &&
+ git mv z y &&
+ git rm x/d &&
+ mkdir -p x/d &&
+ mkdir -p y/d &&
+ echo f >x/d/f &&
+ echo g >y/d/g &&
+ git add x/d/f y/d/g &&
+ test_tick &&
+ git commit -m "B" &&
+
+ git checkout C &&
+ git mv x/d z/ &&
+ rmdir x &&
+ test_tick &&
+ git commit -m "C"
+'
+
+test_expect_failure '7e-check: transitive rename in rename/delete AND dirs in the way' '
+ git checkout B^0 &&
+
+ test_must_fail git merge -s recursive C^0 >out &&
+ test_i18ngrep "CONFLICT (rename/delete).*x/d.*y/d" out &&
+
+ test 5 -eq $(git ls-files -s | wc -l) &&
+ test 1 -eq $(git ls-files -u | wc -l) &&
+ test 2 -eq $(git ls-files -o | wc -l) &&
+
+ test $(git rev-parse :0:x/d/f) = $(git rev-parse B:x/d/f) &&
+ test $(git rev-parse :0:y/d/g) = $(git rev-parse B:y/d/g) &&
+
+ test $(git rev-parse :0:y/b) = $(git rev-parse A:z/b) &&
+ test $(git rev-parse :0:y/c) = $(git rev-parse A:z/c) &&
+ test $(git rev-parse :3:y/d) = $(git rev-parse A:x/d) &&
+
+ test $(git hash-object y/d~C^0) = $(git rev-parse A:x/d)
+'
+
test_done
--
2.15.0.5.g9567be9905
Elijah Newren <newren@gmail.com>