[PATCH 1/7] t5520: test pulling multiple branches into an empty repository

[Paul Tan <pyokagan@gmail.com>]

Commit d09e79cb ("allow pulling into an empty repository") introduced
the ability to pull into an empty head. As pulling in multiple branches
does not make sense in this context, git-pull explicitly fails when
there is an empty head and multiple branches are specified.

Add a test to ensure that this safeguard works.

Signed-off-by: Paul Tan <pyokagan@gmail.com>
---
 t/t5520-pull.sh | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/t/t5520-pull.sh b/t/t5520-pull.sh
index 227d293..01ae1bf 100755
--- a/t/t5520-pull.sh
+++ b/t/t5520-pull.sh
@@ -86,6 +86,18 @@ test_expect_success 'pulling into void does not remove new staged files' '
 	)
 '
 
+test_expect_success 'refuse to pull multiple branches into void' '
+	git branch test master &&
+	test_when_finished "git branch -D test" &&
+	git init cloned-multiple-branches &&
+	test_when_finished "rm -rf cloned-multiple-branches" &&
+	(
+		cd cloned-multiple-branches &&
+		test_must_fail git pull .. master test 2>out &&
+		test_i18ngrep "Cannot merge multiple branches into empty head" out
+	)
+'
+
 test_expect_success 'test . as a remote' '
 
 	git branch copy master &&
-- 
2.1.4