From e91162be9ce7195309dc2b7e3c03988481cee850 Mon Sep 17 00:00:00 2001
From: Johannes Schindelin <johannes.schindelin@gmx.de>
Date: Fri, 6 Dec 2019 13:08:23 +0000
Subject: [PATCH] t3701: verify that the diff.algorithm config setting is
 handled

Without this patch, there is actually no test in Git's test suite that
covers the diff.algorithm feature. Let's add one.

We do this by passing a bogus value and then expecting `git diff-files`
to produce the appropriate error message.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
---
 t/t3701-add-interactive.sh | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/t/t3701-add-interactive.sh b/t/t3701-add-interactive.sh
index 797610e96d..f43634102e 100755
--- a/t/t3701-add-interactive.sh
+++ b/t/t3701-add-interactive.sh
@@ -524,6 +524,16 @@ test_expect_success 'detect bogus diffFilter output' '
 	test_must_fail force_color git add -p <y
 '
 
+test_expect_success 'diff.algorithm is passed to `git diff-files`' '
+	git reset --hard &&
+
+	>file &&
+	git add file &&
+	echo changed >file &&
+	git -c diff.algorithm=bogus add -p 2>err &&
+	test_i18ngrep "error: option diff-algorithm accepts " err
+'
+
 test_expect_success 'patch-mode via -i prompts for files' '
 	git reset --hard &&