[PATCHv2 05/56] t6042: Add tests for content issues with modify/rename/directory conflicts

From: Elijah Newren <newren@gmail.com>
Date: Aug 12, 2011, 05:19 UTC
Message-ID: <1313126429-17368-6-git-send-email-newren@gmail.com>
In-Reply-To: <1313126429-17368-1-git-send-email-newren@gmail.com>

Add testcases that cover a variety of merge issues with files being renamed and modified on different sides of history, when there are directories possibly conflicting with the rename location.

Case 1: On one side of history, a file is modified and a new directory is added. On the other side of history, the file is modified in a non-conflicting way but is renamed to the location of the new directory.

Case 2: [Same as case 1, but there is also a content conflict. In detail:] On one side of history, a file is modified and a new directory is added. On the other side of history, the file is modified in a conflicting way and it is renamed to the location of the new directory.

Case 3: [Similar to case 1, but the "conflicting" directory is the directory where the file original resided. In detail:] On one side of history, a file is modified. On the other side of history, the file is modified in a non-conflicting way, but the directory it was under is removed and the file is renamed to the location of the directory it used to reside in (i.e. 'sub/file' gets renamed to 'sub'). This is flagged as a directory/rename conflict, but should be able to be resolved since the directory can be cleanly removed by the merge.

One branch renames a file and makes a file where the directory the renamed file used to be in, and the other branch updates the file in place. Merging them should resolve it cleanly as long as the content level change on the branches do not overlap and rename is detected, or should leave conflict without losing information.

Signed-off-by: Elijah Newren <newren@gmail.com>
---
Changes since v1: New and improved commit message.

 t/t6042-merge-rename-corner-cases.sh |  141 ++++++++++++++++++++++++++++++++++
 1 files changed, 141 insertions(+), 0 deletions(-)

diff --git a/t/t6042-merge-rename-corner-cases.sh b/t/t6042-merge-rename-corner-cases.sh
index db5560c..b465667 100755
--- a/t/t6042-merge-rename-corner-cases.sh
+++ b/t/t6042-merge-rename-corner-cases.sh
@@ -198,4 +198,145 @@ test_expect_failure 'detect rename/add-source and preserve all data, merge other
 	test $(git rev-parse HEAD:a) = $(git rev-parse C:a)
 '
 
+test_expect_success 'setup content merge + rename/directory conflict' '
+	git rm -rf . &&
+	git clean -fdqx &&
+	rm -rf .git &&
+	git init &&
+
+	printf "1\n2\n3\n4\n5\n6\n" >file &&
+	git add file &&
+	test_tick &&
+	git commit -m base &&
+	git tag base &&
+
+	git checkout -b right &&
+	echo 7 >>file &&
+	mkdir newfile &&
+	echo junk >newfile/realfile &&
+	git add file newfile/realfile &&
+	test_tick &&
+	git commit -m right &&
+
+	git checkout -b left-conflict base &&
+	echo 8 >>file &&
+	git add file &&
+	git mv file newfile &&
+	test_tick &&
+	git commit -m left &&
+
+	git checkout -b left-clean base &&
+	echo 0 >newfile &&
+	cat file >>newfile &&
+	git add newfile &&
+	git rm file &&
+	test_tick &&
+	git commit -m left
+'
+
+test_expect_failure 'rename/directory conflict + clean content merge' '
+	git reset --hard &&
+	git reset --hard &&
+	git clean -fdqx &&
+
+	git checkout left-clean^0 &&
+
+	test_must_fail git merge -s recursive right^0 &&
+
+	test 2 -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) &&
+
+	echo 0 >expect &&
+	git cat-file -p base:file >>expect &&
+	echo 7 >>expect &&
+	test_cmp expect newfile~HEAD &&
+
+	test $(git rev-parse :2:newfile) = $(git hash-object expect) &&
+
+	test -f newfile/realfile &&
+	test -f newfile~HEAD
+'
+
+test_expect_failure 'rename/directory conflict + content merge conflict' '
+	git reset --hard &&
+	git reset --hard &&
+	git clean -fdqx &&
+
+	git checkout left-conflict^0 &&
+
+	test_must_fail git merge -s recursive right^0 &&
+
+	test 4 -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) &&
+
+	git cat-file -p left-conflict:newfile >left &&
+	git cat-file -p base:file    >base &&
+	git cat-file -p right:file   >right &&
+	test_must_fail git merge-file \
+		-L "HEAD:newfile" \
+		-L "" \
+		-L "right^0:file" \
+		left base right &&
+	test_cmp left newfile~HEAD &&
+
+	test $(git rev-parse :1:newfile) = $(git rev-parse base:file) &&
+	test $(git rev-parse :2:newfile) = $(git rev-parse left-conflict:newfile) &&
+	test $(git rev-parse :3:newfile) = $(git rev-parse right:file) &&
+
+	test -f newfile/realfile &&
+	test -f newfile~HEAD
+'
+
+test_expect_success 'setup content merge + rename/directory conflict w/ disappearing dir' '
+	git reset --hard &&
+	git rm -rf . &&
+	git clean -fdqx &&
+	rm -rf .git &&
+	git init &&
+
+	mkdir sub &&
+	printf "1\n2\n3\n4\n5\n6\n" >sub/file &&
+	git add sub/file &&
+	test_tick &&
+	git commit -m base &&
+	git tag base &&
+
+	git checkout -b right &&
+	echo 7 >>sub/file &&
+	git add sub/file &&
+	test_tick &&
+	git commit -m right &&
+
+	git checkout -b left base &&
+	echo 0 >newfile &&
+	cat sub/file >>newfile &&
+	git rm sub/file &&
+	mv newfile sub &&
+	git add sub &&
+	test_tick &&
+	git commit -m left
+'
+
+test_expect_success 'disappearing dir in rename/directory conflict handled' '
+	git reset --hard &&
+	git clean -fdqx &&
+
+	git checkout left^0 &&
+
+	git merge -s recursive right^0 &&
+
+	test 1 -eq $(git ls-files -s | wc -l) &&
+	test 0 -eq $(git ls-files -u | wc -l) &&
+	test 0 -eq $(git ls-files -o | wc -l) &&
+
+	echo 0 >expect &&
+	git cat-file -p base:sub/file >>expect &&
+	echo 7 >>expect &&
+	test_cmp expect sub &&
+
+	test -f sub
+'
+
 test_done

-- 
1.7.6.100.gac5c1