1 files changed, 28 insertions, 0 deletions
diff --git a/t/t2106-update-index-assume-unchanged.sh b/t/t2106-update-index-assume-unchanged.sh
new file mode 100755
index 0000000..d943ddf
--- /dev/null
+++ b/t/t2106-update-index-assume-unchanged.sh
@@ -0,0 +1,28 @@
+#!/bin/sh
+
+test_description='git update-index --assume-unchanged test.
+'
+
+TEST_PASSES_SANITIZE_LEAK=true
+. ./test-lib.sh
+
+test_expect_success 'setup' '
+	: >file &&
+	git add file &&
+	git commit -m initial &&
+	git branch other &&
+	echo upstream >file &&
+	git add file &&
+	git commit -m upstream
+'
+
+test_expect_success 'do not switch branches with dirty file' '
+	git reset --hard &&
+	git checkout other &&
+	echo dirt >file &&
+	git update-index --assume-unchanged file &&
+	test_must_fail git checkout - 2>err &&
+	test_i18ngrep overwritten err
+'
+
+test_done