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From: Elijah Newren <newren@gmail.com>
To: git@vger.kernel.org
Cc: sbeller@google.com, gitster@pobox.com,
	torvalds@linux-foundation.org, Elijah Newren <newren@gmail.com>
Subject: [PATCH v10 27/36] directory rename detection: new testcases showcasing a pair of bugs
Date: Thu, 19 Apr 2018 10:58:14 -0700	[thread overview]
Message-ID: <20180419175823.7946-28-newren@gmail.com> (raw)
In-Reply-To: <20180419175823.7946-1-newren@gmail.com>

Add a testcase showing spurious rename/rename(1to2) conflicts occurring
due to directory rename detection.

Also add a pair of testcases dealing with moving directory hierarchies
around that were suggested by Stefan Beller as "food for thought" during
his review of an earlier patch series, but which actually uncovered a
bug.  Round things out with a test that is a cross between the two
testcases that showed existing bugs in order to make sure we aren't
merely addressing problems in isolation but in general.

Reviewed-by: Stefan Beller <sbeller@google.com>
Signed-off-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
---
 t/t6043-merge-rename-directories.sh | 296 ++++++++++++++++++++++++++++
 1 file changed, 296 insertions(+)

diff --git a/t/t6043-merge-rename-directories.sh b/t/t6043-merge-rename-directories.sh
index 33e2649824..5b84591445 100755
--- a/t/t6043-merge-rename-directories.sh
+++ b/t/t6043-merge-rename-directories.sh
@@ -159,6 +159,7 @@ test_expect_success '1b-check: Merge a directory with another' '
 # Testcase 1c, Transitive renaming
 #   (Related to testcases 3a and 6d -- when should a transitive rename apply?)
 #   (Related to testcases 9c and 9d -- can transitivity repeat?)
+#   (Related to testcase 12b -- joint-transitivity?)
 #   Commit O: z/{b,c},   x/d
 #   Commit A: y/{b,c},   x/d
 #   Commit B: z/{b,c,d}
@@ -2871,6 +2872,68 @@ test_expect_failure '9g-check: Renamed directory that only contained immediate s
 	)
 '
 
+# Testcase 9h, Avoid implicit rename if involved as source on other side
+#   (Extremely closely related to testcase 3a)
+#   Commit O: z/{b,c,d_1}
+#   Commit A: z/{b,c,d_2}
+#   Commit B: y/{b,c}, x/d_1
+#   Expected: y/{b,c}, x/d_2
+#   NOTE: If we applied the z/ -> y/ rename to z/d, then we'd end up with
+#         a rename/rename(1to2) conflict (z/d -> y/d vs. x/d)
+test_expect_success '9h-setup: Avoid dir rename on merely modified path' '
+	test_create_repo 9h &&
+	(
+		cd 9h &&
+
+		mkdir z &&
+		echo b >z/b &&
+		echo c >z/c &&
+		printf "1\n2\n3\n4\n5\n6\n7\n8\nd\n" >z/d &&
+		git add z &&
+		test_tick &&
+		git commit -m "O" &&
+
+		git branch O &&
+		git branch A &&
+		git branch B &&
+
+		git checkout A &&
+		test_tick &&
+		echo more >>z/d &&
+		git add z/d &&
+		git commit -m "A" &&
+
+		git checkout B &&
+		mkdir y &&
+		mkdir x &&
+		git mv z/b y/ &&
+		git mv z/c y/ &&
+		git mv z/d x/ &&
+		rmdir z &&
+		test_tick &&
+		git commit -m "B"
+	)
+'
+
+test_expect_failure '9h-check: Avoid dir rename on merely modified path' '
+	(
+		cd 9h &&
+
+		git checkout A^0 &&
+
+		git merge -s recursive B^0 &&
+
+		git ls-files -s >out &&
+		test_line_count = 3 out &&
+
+		git rev-parse >actual \
+			HEAD:y/b HEAD:y/c HEAD:x/d &&
+		git rev-parse >expect \
+			O:z/b    O:z/c    A:z/d &&
+		test_cmp expect actual
+	)
+'
+
 ###########################################################################
 # Rules suggested by section 9:
 #
@@ -3704,4 +3767,237 @@ test_expect_success '11f-check: Avoid deleting not-uptodate with dir rename/rena
 	)
 '
 
+###########################################################################
+# SECTION 12: Everything else
+#
+# Tests suggested by others.  Tests added after implementation completed
+# and submitted.  Grab bag.
+###########################################################################
+
+# Testcase 12a, Moving one directory hierarchy into another
+#   (Related to testcase 9a)
+#   Commit O: node1/{leaf1,leaf2}, node2/{leaf3,leaf4}
+#   Commit A: node1/{leaf1,leaf2,node2/{leaf3,leaf4}}
+#   Commit B: node1/{leaf1,leaf2,leaf5}, node2/{leaf3,leaf4,leaf6}
+#   Expected: node1/{leaf1,leaf2,leaf5,node2/{leaf3,leaf4,leaf6}}
+
+test_expect_success '12a-setup: Moving one directory hierarchy into another' '
+	test_create_repo 12a &&
+	(
+		cd 12a &&
+
+		mkdir -p node1 node2 &&
+		echo leaf1 >node1/leaf1 &&
+		echo leaf2 >node1/leaf2 &&
+		echo leaf3 >node2/leaf3 &&
+		echo leaf4 >node2/leaf4 &&
+		git add node1 node2 &&
+		test_tick &&
+		git commit -m "O" &&
+
+		git branch O &&
+		git branch A &&
+		git branch B &&
+
+		git checkout A &&
+		git mv node2/ node1/ &&
+		test_tick &&
+		git commit -m "A" &&
+
+		git checkout B &&
+		echo leaf5 >node1/leaf5 &&
+		echo leaf6 >node2/leaf6 &&
+		git add node1 node2 &&
+		test_tick &&
+		git commit -m "B"
+	)
+'
+
+test_expect_success '12a-check: Moving one directory hierarchy into another' '
+	(
+		cd 12a &&
+
+		git checkout A^0 &&
+
+		git merge -s recursive B^0 &&
+
+		git ls-files -s >out &&
+		test_line_count = 6 out &&
+
+		git rev-parse >actual \
+			HEAD:node1/leaf1 HEAD:node1/leaf2 HEAD:node1/leaf5 \
+			HEAD:node1/node2/leaf3 \
+			HEAD:node1/node2/leaf4 \
+			HEAD:node1/node2/leaf6 &&
+		git rev-parse >expect \
+			O:node1/leaf1    O:node1/leaf2    B:node1/leaf5 \
+			O:node2/leaf3 \
+			O:node2/leaf4 \
+			B:node2/leaf6 &&
+		test_cmp expect actual
+	)
+'
+
+# Testcase 12b, Moving two directory hierarchies into each other
+#   (Related to testcases 1c and 12c)
+#   Commit O: node1/{leaf1, leaf2}, node2/{leaf3, leaf4}
+#   Commit A: node1/{leaf1, leaf2, node2/{leaf3, leaf4}}
+#   Commit B: node2/{leaf3, leaf4, node1/{leaf1, leaf2}}
+#   Expected: node1/node2/node1/{leaf1, leaf2},
+#             node2/node1/node2/{leaf3, leaf4}
+#   NOTE: Without directory renames, we would expect
+#                   node2/node1/{leaf1, leaf2},
+#                   node1/node2/{leaf3, leaf4}
+#         with directory rename detection, we note that
+#             commit A renames node2/ -> node1/node2/
+#             commit B renames node1/ -> node2/node1/
+#         therefore, applying those directory renames to the initial result
+#         (making all four paths experience a transitive renaming), yields
+#         the expected result.
+#
+#         You may ask, is it weird to have two directories rename each other?
+#         To which, I can do no more than shrug my shoulders and say that
+#         even simple rules give weird results when given weird inputs.
+
+test_expect_success '12b-setup: Moving one directory hierarchy into another' '
+	test_create_repo 12b &&
+	(
+		cd 12b &&
+
+		mkdir -p node1 node2 &&
+		echo leaf1 >node1/leaf1 &&
+		echo leaf2 >node1/leaf2 &&
+		echo leaf3 >node2/leaf3 &&
+		echo leaf4 >node2/leaf4 &&
+		git add node1 node2 &&
+		test_tick &&
+		git commit -m "O" &&
+
+		git branch O &&
+		git branch A &&
+		git branch B &&
+
+		git checkout A &&
+		git mv node2/ node1/ &&
+		test_tick &&
+		git commit -m "A" &&
+
+		git checkout B &&
+		git mv node1/ node2/ &&
+		test_tick &&
+		git commit -m "B"
+	)
+'
+
+test_expect_failure '12b-check: Moving one directory hierarchy into another' '
+	(
+		cd 12b &&
+
+		git checkout A^0 &&
+
+		git merge -s recursive B^0 &&
+
+		git ls-files -s >out &&
+		test_line_count = 4 out &&
+
+		git rev-parse >actual \
+			HEAD:node1/node2/node1/leaf1 \
+			HEAD:node1/node2/node1/leaf2 \
+			HEAD:node2/node1/node2/leaf3 \
+			HEAD:node2/node1/node2/leaf4 &&
+		git rev-parse >expect \
+			O:node1/leaf1 \
+			O:node1/leaf2 \
+			O:node2/leaf3 \
+			O:node2/leaf4 &&
+		test_cmp expect actual
+	)
+'
+
+# Testcase 12c, Moving two directory hierarchies into each other w/ content merge
+#   (Related to testcase 12b)
+#   Commit O: node1/{       leaf1_1, leaf2_1}, node2/{leaf3_1, leaf4_1}
+#   Commit A: node1/{       leaf1_2, leaf2_2,  node2/{leaf3_2, leaf4_2}}
+#   Commit B: node2/{node1/{leaf1_3, leaf2_3},        leaf3_3, leaf4_3}
+#   Expected: Content merge conflicts for each of:
+#               node1/node2/node1/{leaf1, leaf2},
+#               node2/node1/node2/{leaf3, leaf4}
+#   NOTE: This is *exactly* like 12c, except that every path is modified on
+#         each side of the merge.
+
+test_expect_success '12c-setup: Moving one directory hierarchy into another w/ content merge' '
+	test_create_repo 12c &&
+	(
+		cd 12c &&
+
+		mkdir -p node1 node2 &&
+		printf "1\n2\n3\n4\n5\n6\n7\n8\nleaf1\n" >node1/leaf1 &&
+		printf "1\n2\n3\n4\n5\n6\n7\n8\nleaf2\n" >node1/leaf2 &&
+		printf "1\n2\n3\n4\n5\n6\n7\n8\nleaf3\n" >node2/leaf3 &&
+		printf "1\n2\n3\n4\n5\n6\n7\n8\nleaf4\n" >node2/leaf4 &&
+		git add node1 node2 &&
+		test_tick &&
+		git commit -m "O" &&
+
+		git branch O &&
+		git branch A &&
+		git branch B &&
+
+		git checkout A &&
+		git mv node2/ node1/ &&
+		for i in `git ls-files`; do echo side A >>$i; done &&
+		git add -u &&
+		test_tick &&
+		git commit -m "A" &&
+
+		git checkout B &&
+		git mv node1/ node2/ &&
+		for i in `git ls-files`; do echo side B >>$i; done &&
+		git add -u &&
+		test_tick &&
+		git commit -m "B"
+	)
+'
+
+test_expect_failure '12c-check: Moving one directory hierarchy into another w/ content merge' '
+	(
+		cd 12c &&
+
+		git checkout A^0 &&
+
+		test_must_fail git merge -s recursive B^0 &&
+
+		git ls-files -u >out &&
+		test_line_count = 12 out &&
+
+		git rev-parse >actual \
+			:1:node1/node2/node1/leaf1 \
+			:1:node1/node2/node1/leaf2 \
+			:1:node2/node1/node2/leaf3 \
+			:1:node2/node1/node2/leaf4 \
+			:2:node1/node2/node1/leaf1 \
+			:2:node1/node2/node1/leaf2 \
+			:2:node2/node1/node2/leaf3 \
+			:2:node2/node1/node2/leaf4 \
+			:3:node1/node2/node1/leaf1 \
+			:3:node1/node2/node1/leaf2 \
+			:3:node2/node1/node2/leaf3 \
+			:3:node2/node1/node2/leaf4 &&
+		git rev-parse >expect \
+			O:node1/leaf1 \
+			O:node1/leaf2 \
+			O:node2/leaf3 \
+			O:node2/leaf4 \
+			A:node1/leaf1 \
+			A:node1/leaf2 \
+			A:node1/node2/leaf3 \
+			A:node1/node2/leaf4 \
+			B:node2/node1/leaf1 \
+			B:node2/node1/leaf2 \
+			B:node2/leaf3 \
+			B:node2/leaf4 &&
+		test_cmp expect actual
+	)
+'
+
 test_done
-- 
2.17.0.290.ge988e9ce2a


  parent reply	other threads:[~2018-04-19 18:00 UTC|newest]

Thread overview: 78+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-04-19 17:57 [PATCH v10 00/36] Add directory rename detection to git Elijah Newren
2018-04-19 17:57 ` [PATCH v10 01/36] directory rename detection: basic testcases Elijah Newren
2018-04-19 17:57 ` [PATCH v10 02/36] directory rename detection: directory splitting testcases Elijah Newren
2018-04-19 17:57 ` [PATCH v10 03/36] directory rename detection: testcases to avoid taking detection too far Elijah Newren
2018-04-19 17:57 ` [PATCH v10 04/36] directory rename detection: partially renamed directory testcase/discussion Elijah Newren
2018-04-19 17:57 ` [PATCH v10 05/36] directory rename detection: files/directories in the way of some renames Elijah Newren
2018-04-19 17:57 ` [PATCH v10 06/36] directory rename detection: testcases checking which side did the rename Elijah Newren
2018-04-19 17:57 ` [PATCH v10 07/36] directory rename detection: more involved edge/corner testcases Elijah Newren
2018-04-19 17:57 ` [PATCH v10 08/36] directory rename detection: testcases exploring possibly suboptimal merges Elijah Newren
2018-04-19 17:57 ` [PATCH v10 09/36] directory rename detection: miscellaneous testcases to complete coverage Elijah Newren
2018-04-19 17:57 ` [PATCH v10 10/36] directory rename detection: tests for handling overwriting untracked files Elijah Newren
2018-04-19 17:57 ` [PATCH v10 11/36] directory rename detection: tests for handling overwriting dirty files Elijah Newren
2018-04-19 17:57 ` [PATCH v10 12/36] merge-recursive: move the get_renames() function Elijah Newren
2018-04-19 17:58 ` [PATCH v10 13/36] merge-recursive: introduce new functions to handle rename logic Elijah Newren
2018-04-19 17:58 ` [PATCH v10 14/36] merge-recursive: fix leaks of allocated renames and diff_filepairs Elijah Newren
2018-04-19 17:58 ` [PATCH v10 15/36] merge-recursive: make !o->detect_rename codepath more obvious Elijah Newren
2018-04-19 17:58 ` [PATCH v10 16/36] merge-recursive: split out code for determining diff_filepairs Elijah Newren
2018-04-19 17:58 ` [PATCH v10 17/36] merge-recursive: make a helper function for cleanup for handle_renames Elijah Newren
2018-04-19 17:58 ` [PATCH v10 18/36] merge-recursive: add get_directory_renames() Elijah Newren
2018-05-06 23:41   ` SZEDER Gábor
2018-05-07 15:45     ` [PATCH] fixup! " Elijah Newren
2019-10-09 20:38   ` [PATCH v10 18/36] " Johannes Schindelin
2019-10-11 20:02     ` Elijah Newren
2019-10-12 19:23       ` Johannes Schindelin
2018-04-19 17:58 ` [PATCH v10 19/36] merge-recursive: check for directory level conflicts Elijah Newren
2018-04-19 17:58 ` [PATCH v10 20/36] merge-recursive: add computation of collisions due to dir rename & merging Elijah Newren
2018-04-19 17:58 ` [PATCH v10 21/36] merge-recursive: check for file level conflicts then get new name Elijah Newren
2018-04-19 17:58 ` [PATCH v10 22/36] merge-recursive: when comparing files, don't include trees Elijah Newren
2018-04-19 17:58 ` [PATCH v10 23/36] merge-recursive: apply necessary modifications for directory renames Elijah Newren
2018-04-19 17:58 ` [PATCH v10 24/36] merge-recursive: avoid clobbering untracked files with " Elijah Newren
2018-04-19 17:58 ` [PATCH v10 25/36] merge-recursive: fix overwriting dirty files involved in renames Elijah Newren
2018-04-19 20:48   ` Martin Ågren
2018-04-19 20:54     ` Martin Ågren
2018-04-19 21:06     ` Elijah Newren
2018-04-19 17:58 ` [PATCH v10 26/36] merge-recursive: fix remaining directory rename + dirty overwrite cases Elijah Newren
2018-04-19 17:58 ` Elijah Newren [this message]
2018-04-19 17:58 ` [PATCH v10 28/36] merge-recursive: avoid spurious rename/rename conflict from dir renames Elijah Newren
2018-04-19 17:58 ` [PATCH v10 29/36] merge-recursive: improve add_cacheinfo error handling Elijah Newren
2018-04-19 17:58 ` [PATCH v10 30/36] merge-recursive: move more is_dirty handling to merge_content Elijah Newren
2018-04-19 17:58 ` [PATCH v10 31/36] merge-recursive: avoid triggering add_cacheinfo error with dirty mod Elijah Newren
2018-04-19 17:58 ` [PATCH v10 32/36] t6046: testcases checking whether updates can be skipped in a merge Elijah Newren
2018-04-19 20:26   ` SZEDER Gábor
2018-04-19 20:55     ` Elijah Newren
2018-04-19 17:58 ` [PATCH v10 33/36] merge-recursive: fix was_tracked() to quit lying with some renamed paths Elijah Newren
2018-04-19 20:39   ` Martin Ågren
2018-04-19 20:54     ` Elijah Newren
2018-04-20 12:23   ` SZEDER Gábor
2018-04-20 15:23     ` Elijah Newren
2018-04-21 19:37     ` [RFC PATCH v10 32.5/36] unpack_trees: fix memory corruption with split_index when src != dst Elijah Newren
2018-04-21 20:13       ` Elijah Newren
2018-04-22 12:38       ` Duy Nguyen
2018-04-23 17:09         ` Elijah Newren
2018-04-23 17:37           ` Duy Nguyen
2018-04-23 18:05             ` Elijah Newren
2018-04-24  0:24               ` [PATCH v2] unpack_trees: fix breakage when o->src_index != o->dst_index Elijah Newren
2018-04-24  1:51                 ` Junio C Hamano
2018-04-24  3:05                 ` Junio C Hamano
2018-04-24  6:50                   ` [PATCH v3] " Elijah Newren
2018-04-29 18:05                     ` Duy Nguyen
2018-04-29 20:53                       ` Johannes Schindelin
2018-04-30 14:42                         ` Duy Nguyen
2018-04-30 14:45                           ` Duy Nguyen
2018-04-30 16:19                             ` Elijah Newren
2018-04-30 16:29                               ` Duy Nguyen
2018-04-19 17:58 ` [PATCH v10 34/36] merge-recursive: fix remainder of was_dirty() to use original index Elijah Newren
2018-04-19 17:58 ` [PATCH v10 35/36] merge-recursive: make "Auto-merging" comment show for other merges Elijah Newren
2018-04-19 17:58 ` [PATCH v10 36/36] merge-recursive: fix check for skipability of working tree updates Elijah Newren
2018-04-19 18:35 ` [PATCH v10 00/36] Add directory rename detection to git Elijah Newren
2018-04-19 18:41   ` Stefan Beller
2018-04-19 19:54     ` Derrick Stolee
2018-04-19 20:22   ` Elijah Newren
2018-04-20  3:05   ` Junio C Hamano
2018-04-23 17:50     ` Elijah Newren
2018-04-24 20:20     ` [PATCH v10 1/2] fixup! merge-recursive: fix was_tracked() to quit lying with some renamed paths Elijah Newren
2018-04-24 20:21       ` [PATCH v10 2/2] fixup! t6046: testcases checking whether updates can be skipped in a merge Elijah Newren
2018-04-23 17:28 ` [PATCH v10 00/36] Add directory rename detection to git Elijah Newren
2018-04-23 23:46   ` Junio C Hamano
2018-04-24  0:15     ` Elijah Newren

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