[RFC PATCH 5/7] t6044: add more testcases with staged changes before a merge is invoked

From

Elijah Newren <newren@gmail.com>

Date

Jun 3, 2018, 06:58 UTC

Message-ID

<20180603065810.23841-6-newren@gmail.com>

In-Reply-To

<20180603065810.23841-1-newren@gmail.com>

According to Documentation/git-merge.txt,

    ...[merge will] abort if there are any changes registered in the index
    relative to the `HEAD` commit.  (One exception is when the changed index
    entries are in the state that would result from the merge already.)

Signed-off-by: Elijah Newren <newren@gmail.com>
---
 t/t6044-merge-unrelated-index-changes.sh | 29 ++++++++++++++++++++++++
 1 file changed, 29 insertions(+)

diff --git a/t/t6044-merge-unrelated-index-changes.sh b/t/t6044-merge-unrelated-index-changes.sh
index 1d43712c52..e609f14f87 100755
--- a/t/t6044-merge-unrelated-index-changes.sh
+++ b/t/t6044-merge-unrelated-index-changes.sh
@@ -137,6 +137,35 @@ test_expect_success 'merge-recursive, when index==head but head!=HEAD' '
 	test_i18ngrep "Already up to date" out
 '
 
+test_expect_failure 'recursive, when file has staged changes not matching HEAD nor what a merge would give' '
+	git reset --hard &&
+	git checkout B^0 &&
+
+	mkdir subdir &&
+	test_seq 1 10 >subdir/a &&
+	git add subdir/a &&
+
+	# HEAD has no subdir/a; merge would write 1..11 to subdir/a;
+	# Since subdir/a matches neither HEAD nor what the merge would write
+	# to that file, the merge should fail to avoid overwriting what is
+	# currently found in subdir/a
+	test_must_fail git merge -s recursive E^0
+'
+
+test_expect_failure 'recursive, when file has staged changes matching what a merge would give' '
+	git reset --hard &&
+	git checkout B^0 &&
+
+	mkdir subdir &&
+	test_seq 1 11 >subdir/a &&
+	git add subdir/a &&
+
+	# HEAD has no subdir/a; merge would write 1..11 to subdir/a;
+	# Since subdir/a matches what the merge would write to that file,
+	# the merge should be safe to proceed
+	git merge -s recursive E^0
+'
+
 test_expect_success 'octopus, unrelated file touched' '
 	git reset --hard &&
 	git checkout B^0 &&

-- 
2.18.0.rc0.49.g3c08dc0fef