[PATCH 2/5] t7607: add leading-path tests

[Clemens Buchacher <drizzd@aon.at>]

Signed-off-by: Clemens Buchacher <drizzd@aon.at>
---

I added a test for symlinks as well, even though from the code it
looks like overwriting untracked symlinks is intentionally allowed.
One could argue that symlinks are valuable just like regular files.
On the other hand, the potential loss of information is relatively
small.

For consistency, I would prefer to treat symlinks just like regular
files, but I do not feel strongly about it.

Clemens

 t/t7607-merge-overwrite.sh |   51 ++++++++++++++++++++++++++++++++++++++++++++
 1 files changed, 51 insertions(+), 0 deletions(-)

diff --git a/t/t7607-merge-overwrite.sh b/t/t7607-merge-overwrite.sh
index 6ed40b1..01b070b 100755
--- a/t/t7607-merge-overwrite.sh
+++ b/t/t7607-merge-overwrite.sh
@@ -12,6 +12,12 @@ test_expect_success 'setup' '
 	test_commit "c1a" "c1.t" "c1 a" &&
 	git reset --hard c0 &&
 	test_commit c2 &&
+	git reset --hard c0 &&
+	mkdir sub &&
+	echo "sub/f" > sub/f &&
+	git add sub/f &&
+	git commit -m sub &&
+	git tag sub &&
 	echo "VERY IMPORTANT CHANGES" > important
 '
 
@@ -23,6 +29,14 @@ test_expect_success 'will not overwrite untracked file' '
 	test_cmp important c2.t
 '
 
+test_expect_success 'will overwrite tracked file' '
+	git reset --hard c1 &&
+	cp important c2.t &&
+	git add c2.t &&
+	git commit -m important &&
+	git checkout c2
+'
+
 test_expect_success 'will not overwrite new file' '
 	git reset --hard c1 &&
 	cp important c2.t &&
@@ -76,4 +90,41 @@ test_expect_success 'will not overwrite removed file with staged changes' '
 	test_cmp important c1.t
 '
 
+test_expect_success 'will not overwrite untracked subtree' '
+	git reset --hard c0 &&
+	rm -rf sub &&
+	mkdir -p sub/f &&
+	cp important sub/f/important &&
+	test_must_fail git merge sub &&
+	! test -f .git/MERGE_HEAD &&
+	test_cmp important sub/f/important
+'
+
+test_expect_failure 'will not overwrite untracked file in leading path' '
+	git reset --hard c0 &&
+	rm -rf sub &&
+	cp important sub &&
+	test_must_fail git merge sub &&
+	! test -f .git/MERGE_HEAD &&
+	test_cmp important sub
+'
+
+test_expect_failure 'will not overwrite untracked symlink in leading path' '
+	git reset --hard c0 &&
+	rm -rf sub &&
+	mkdir sub2 &&
+	ln -s sub2 sub &&
+	test_must_fail git merge sub &&
+	! test -f .git/MERGE_HEAD
+'
+
+test_expect_success 'will not be confused by symlink in leading path' '
+	git reset --hard c0 &&
+	rm -rf sub &&
+	ln -s sub2 sub &&
+	git add sub &&
+	git commit -m ln &&
+	git checkout sub
+'
+
 test_done
-- 
1.7.1.571.gba4d01