[GSoC][RFC PATCH 6/6] t4014: add tests for the new flag --subject-extra-prefix

[Lucas Seiki Oshiro <lucasseikioshiro@gmail.com>]

Add tests for `format-patch --subject-extra-prefix` asserting that it
works correctly in the following situations:

- without other flags related to the prefix;

- with the --rfc flag, which should add RFC to the prefix;

- with the -n flag, which should add the numbering to the prefix;

- with the -v flag, which should add the patch version to the prefix;

- with the -k flag, diying as they aren't meant to be used together.

Signed-off-by: Lucas Seiki Oshiro <lucasseikioshiro@gmail.com>
---
 t/t4014-format-patch.sh | 40 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 40 insertions(+)

diff --git a/t/t4014-format-patch.sh b/t/t4014-format-patch.sh
index 884f83fb8a..1256ce2197 100755
--- a/t/t4014-format-patch.sh
+++ b/t/t4014-format-patch.sh
@@ -1444,6 +1444,46 @@ test_expect_success '--rfc and -k cannot be used together' '
 	test_cmp expect.err actual.err
 '
 
+cat >expect <<'EOF'
+Subject: [EXTRA][PATCH] header with . in it
+EOF
+test_expect_success '--subject-extra-prefix adds extra prefix' '
+	git format-patch -1 --stdout --subject-extra-prefix=EXTRA >patch &&
+	grep ^Subject: patch >actual &&
+	test_cmp expect actual
+'
+
+cat >expect <<'EOF'
+Subject: [EXTRA][RFC PATCH] header with . in it
+EOF
+test_expect_success '--subject-extra-prefix works with --rfc' '
+	git format-patch --rfc -1 --stdout --subject-extra-prefix=EXTRA >patch &&
+	grep ^Subject: patch >actual &&
+	test_cmp expect actual
+'
+
+cat >expect <<'EOF'
+Subject: [EXTRA][PATCH 1/1] header with . in it
+EOF
+test_expect_success '--subject-extra-prefix works with numbered patches' '
+	git format-patch -n -1 --stdout --subject-extra-prefix=EXTRA >patch &&
+	grep ^Subject: patch >actual &&
+	test_cmp expect actual
+'
+
+cat >expect <<'EOF'
+Subject: [EXTRA][PATCH v2] header with . in it
+EOF
+test_expect_success '--subject-extra-prefix works with -v' '
+	git format-patch -v2 -1 --stdout --subject-extra-prefix=EXTRA >patch &&
+	grep ^Subject: patch >actual &&
+	test_cmp expect actual
+'
+
+test_expect_failure '--subject-extra-prefix does not run with -k' '
+	git format-patch -k -1 --stdout --subject-extra-prefix=EXTRA >/dev/null
+'
+
 test_expect_success '--from=ident notices bogus ident' '
 	test_must_fail git format-patch -1 --stdout --from=foo >patch
 '
-- 
2.39.5 (Apple Git-154)