[PATCHv3 2/3] t6022: New test checking for unnecessary updates of files in D/F conflicts

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Signed-off-by: Elijah Newren <newren@xxxxxxxxx>
Acked-by: Jeff King <peff@xxxxxxxx>
---
 t/t6022-merge-rename.sh |   34 ++++++++++++++++++++++++++++++++++
 1 files changed, 34 insertions(+), 0 deletions(-)

diff --git a/t/t6022-merge-rename.sh b/t/t6022-merge-rename.sh
index 16330a6..88cc410 100755
--- a/t/t6022-merge-rename.sh
+++ b/t/t6022-merge-rename.sh
@@ -640,4 +640,38 @@ test_expect_failure 'avoid unnecessary update, normal rename' '
 	test_cmp expect actual
 '
 
+test_expect_success 'setup avoid unnecessary update, with D/F conflict' '
+	git reset --hard &&
+	git checkout --orphan avoid-unnecessary-update-2 &&
+	git rm -rf . &&
+	git clean -fdqx &&
+
+	mkdir df &&
+	printf "1\n2\n3\n4\n5\n6\n7\n8\n9\n10\n" >df/file &&
+	git add -A &&
+	git commit -m "Common commmit" &&
+
+	git mv df/file temp &&
+	rm -rf df &&
+	git mv temp df &&
+	echo 11 >>df &&
+	git add -u &&
+	git commit -m "Renamed and modified" &&
+
+	git checkout -b merge-branch-2 HEAD~1 &&
+	>unrelated-change &&
+	git add unrelated-change &&
+	git commit -m "Only unrelated changes"
+'
+
+test_expect_failure 'avoid unnecessary update, with D/F conflict' '
+	git checkout -q avoid-unnecessary-update-2^0 &&
+	test-chmtime =1 rename &&
+	test-chmtime -v +0 rename >expect &&
+	git merge merge-branch-2 &&
+	git diff-files --exit-code &&   # Is "rename" clean, or stat dirty?
+	test-chmtime -v +0 rename >actual &&
+	test_cmp expect actual
+'
+
 test_done
-- 
1.7.4

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