From: Elijah Newren <newren@gmail.com>
To: git@vger.kernel.org
Cc: Elijah Newren <newren@gmail.com>
Subject: [PATCH 10/30] directory rename detection: more involved edge/corner testcases
Date: Fri, 10 Nov 2017 11:05:30 -0800 [thread overview]
Message-ID: <20171110190550.27059-11-newren@gmail.com> (raw)
In-Reply-To: <20171110190550.27059-1-newren@gmail.com>
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
next prev parent reply other threads:[~2017-11-10 19:06 UTC|newest]
Thread overview: 81+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-11-10 19:05 [PATCH 00/30] Add directory rename detection to git Elijah Newren
2017-11-10 19:05 ` [PATCH 01/30] Tighten and correct a few testcases for merging and cherry-picking Elijah Newren
2017-11-13 19:32 ` Stefan Beller
2017-11-10 19:05 ` [PATCH 02/30] merge-recursive: Fix logic ordering issue Elijah Newren
2017-11-13 19:48 ` Stefan Beller
2017-11-13 22:04 ` Elijah Newren
2017-11-13 22:12 ` Stefan Beller
2017-11-13 23:39 ` Elijah Newren
2017-11-13 23:46 ` Stefan Beller
2017-11-10 19:05 ` [PATCH 03/30] merge-recursive: Add explanation for src_entry and dst_entry Elijah Newren
2017-11-13 21:06 ` Stefan Beller
2017-11-13 22:57 ` Elijah Newren
2017-11-13 23:11 ` Stefan Beller
2017-11-14 1:26 ` Junio C Hamano
2017-11-10 19:05 ` [PATCH 04/30] directory rename detection: basic testcases Elijah Newren
2017-11-13 22:04 ` Stefan Beller
2017-11-14 0:57 ` Elijah Newren
2017-11-14 1:21 ` Stefan Beller
2017-11-14 1:40 ` Elijah Newren
2017-11-14 2:03 ` Junio C Hamano
2017-11-10 19:05 ` [PATCH 05/30] directory rename detection: directory splitting testcases Elijah Newren
2017-11-13 23:20 ` Stefan Beller
2017-11-10 19:05 ` [PATCH 06/30] directory rename detection: testcases to avoid taking detection too far Elijah Newren
2017-11-13 23:25 ` Stefan Beller
2017-11-14 1:02 ` Elijah Newren
2017-11-10 19:05 ` [PATCH 07/30] directory rename detection: partially renamed directory testcase/discussion Elijah Newren
2017-11-14 0:07 ` Stefan Beller
2017-11-10 19:05 ` [PATCH 08/30] directory rename detection: files/directories in the way of some renames Elijah Newren
2017-11-14 0:15 ` Stefan Beller
2017-11-14 1:19 ` Elijah Newren
2017-11-10 19:05 ` [PATCH 09/30] directory rename detection: testcases checking which side did the rename Elijah Newren
2017-11-14 0:25 ` Stefan Beller
2017-11-14 1:30 ` Elijah Newren
2017-11-10 19:05 ` Elijah Newren [this message]
2017-11-14 0:42 ` [PATCH 10/30] directory rename detection: more involved edge/corner testcases Stefan Beller
2017-11-14 21:11 ` Elijah Newren
2017-11-14 22:47 ` Stefan Beller
2017-11-10 19:05 ` [PATCH 11/30] directory rename detection: testcases exploring possibly suboptimal merges Elijah Newren
2017-11-14 20:33 ` Stefan Beller
2017-11-14 21:42 ` Elijah Newren
2017-11-10 19:05 ` [PATCH 12/30] directory rename detection: miscellaneous testcases to complete coverage Elijah Newren
2017-11-15 20:03 ` Stefan Beller
2017-11-16 21:17 ` Elijah Newren
2017-11-10 19:05 ` [PATCH 13/30] directory rename detection: tests for handling overwriting untracked files Elijah Newren
2017-11-10 19:05 ` [PATCH 14/30] directory rename detection: tests for handling overwriting dirty files Elijah Newren
2017-11-10 19:05 ` [PATCH 15/30] merge-recursive: Move the get_renames() function Elijah Newren
2017-11-14 4:46 ` Junio C Hamano
2017-11-14 17:41 ` Elijah Newren
2017-11-15 1:20 ` Junio C Hamano
2017-11-10 19:05 ` [PATCH 16/30] merge-recursive: Introduce new functions to handle rename logic Elijah Newren
2017-11-14 4:56 ` Junio C Hamano
2017-11-14 5:14 ` Junio C Hamano
2017-11-14 18:24 ` Elijah Newren
2017-11-10 19:05 ` [PATCH 17/30] merge-recursive: Fix leaks of allocated renames and diff_filepairs Elijah Newren
2017-11-14 4:58 ` Junio C Hamano
2017-11-10 19:05 ` [PATCH 18/30] merge-recursive: Make !o->detect_rename codepath more obvious Elijah Newren
2017-11-10 19:05 ` [PATCH 19/30] merge-recursive: Split out code for determining diff_filepairs Elijah Newren
2017-11-14 5:20 ` Junio C Hamano
2017-11-10 19:05 ` [PATCH 20/30] merge-recursive: Add a new hashmap for storing directory renames Elijah Newren
2017-11-10 19:05 ` [PATCH 21/30] merge-recursive: Add get_directory_renames() Elijah Newren
2017-11-14 5:30 ` Junio C Hamano
2017-11-14 18:38 ` Elijah Newren
2017-11-10 19:05 ` [PATCH 22/30] merge-recursive: Check for directory level conflicts Elijah Newren
2017-11-10 19:05 ` [PATCH 23/30] merge-recursive: Add a new hashmap for storing file collisions Elijah Newren
2017-11-10 19:05 ` [PATCH 24/30] merge-recursive: Add computation of collisions due to dir rename & merging Elijah Newren
2018-06-10 10:56 ` René Scharfe
2018-06-10 11:03 ` René Scharfe
2018-06-10 20:44 ` Jeff King
2018-06-11 15:03 ` Elijah Newren
2018-06-14 17:36 ` Junio C Hamano
2017-11-10 19:05 ` [PATCH 25/30] merge-recursive: Check for file level conflicts then get new name Elijah Newren
2017-11-10 19:05 ` [PATCH 26/30] merge-recursive: When comparing files, don't include trees Elijah Newren
2017-11-10 19:05 ` [PATCH 27/30] merge-recursive: Apply necessary modifications for directory renames Elijah Newren
2017-11-15 20:23 ` Stefan Beller
2017-11-16 3:54 ` Elijah Newren
2017-11-10 19:05 ` [PATCH 28/30] merge-recursive: Avoid clobbering untracked files with " Elijah Newren
2017-11-10 19:05 ` [RFC PATCH 29/30] merge-recursive: Fix overwriting dirty files involved in renames Elijah Newren
2017-11-10 19:05 ` [PATCH 30/30] merge-recursive: Fix remaining directory rename + dirty overwrite cases Elijah Newren
2017-11-10 22:27 ` [PATCH 00/30] Add directory rename detection to git Philip Oakley
2017-11-10 23:26 ` Elijah Newren
2017-11-13 15:04 ` Philip Oakley
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