1 files changed, 87 insertions, 0 deletions
diff --git a/third_party/git/t/t4023-diff-rename-typechange.sh b/third_party/git/t/t4023-diff-rename-typechange.sh
new file mode 100755
index 0000000000..8c9823765e
--- /dev/null
+++ b/third_party/git/t/t4023-diff-rename-typechange.sh
@@ -0,0 +1,87 @@
+#!/bin/sh
+
+test_description='typechange rename detection'
+
+. ./test-lib.sh
+
+test_expect_success setup '
+
+	rm -f foo bar &&
+	cat "$TEST_DIRECTORY"/../COPYING >foo &&
+	test_ln_s_add linklink bar &&
+	git add foo &&
+	git commit -a -m Initial &&
+	git tag one &&
+
+	git rm -f foo bar &&
+	cat "$TEST_DIRECTORY"/../COPYING >bar &&
+	test_ln_s_add linklink foo &&
+	git add bar &&
+	git commit -a -m Second &&
+	git tag two &&
+
+	git rm -f foo bar &&
+	cat "$TEST_DIRECTORY"/../COPYING >foo &&
+	git add foo &&
+	git commit -a -m Third &&
+	git tag three &&
+
+	mv foo bar &&
+	test_ln_s_add linklink foo &&
+	git add bar &&
+	git commit -a -m Fourth &&
+	git tag four &&
+
+	# This is purely for sanity check
+
+	git rm -f foo bar &&
+	cat "$TEST_DIRECTORY"/../COPYING >foo &&
+	cat "$TEST_DIRECTORY"/../Makefile >bar &&
+	git add foo bar &&
+	git commit -a -m Fifth &&
+	git tag five &&
+
+	git rm -f foo bar &&
+	cat "$TEST_DIRECTORY"/../Makefile >foo &&
+	cat "$TEST_DIRECTORY"/../COPYING >bar &&
+	git add foo bar &&
+	git commit -a -m Sixth &&
+	git tag six
+
+'
+
+test_expect_success 'cross renames to be detected for regular files' '
+
+	git diff-tree five six -r --name-status -B -M | sort >actual &&
+	{
+		echo "R100	foo	bar"
+		echo "R100	bar	foo"
+	} | sort >expect &&
+	test_cmp expect actual
+
+'
+
+test_expect_success 'cross renames to be detected for typechange' '
+
+	git diff-tree one two -r --name-status -B -M | sort >actual &&
+	{
+		echo "R100	foo	bar"
+		echo "R100	bar	foo"
+	} | sort >expect &&
+	test_cmp expect actual
+
+'
+
+test_expect_success 'moves and renames' '
+
+	git diff-tree three four -r --name-status -B -M | sort >actual &&
+	{
+		# see -B -M (#6) in t4008
+		echo "C100	foo	bar"
+		echo "T100	foo"
+	} | sort >expect &&
+	test_cmp expect actual
+
+'
+
+test_done