t2200: check that "add -u" limits itself to subdirectory

This behavior is due to change in the future, but let's test
it anyway. That helps make sure we do not accidentally
switch the behavior too soon while we are working in the
area, and it means that we can easily verify the change when
we do make it.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/t/t2200-add-update.sh b/t/t2200-add-update.sh
index 4cdebda6a5c9b893f46e99b5b565cc4b70efb2db..c317254b9a82befd3400d300f85ecfd661d1a948 100755 (executable)
--- a/t/t2200-add-update.sh
+++ b/t/t2200-add-update.sh
@@ -80,6 +80,22 @@ test_expect_success 'change gets noticed' '
 
 '
 
+# Note that this is scheduled to change in Git 2.0, when
+# "git add -u" will become full-tree by default.
+test_expect_success 'non-limited update in subdir leaves root alone' '
+       (
+               cd dir1 &&
+               echo even more >>sub2 &&
+               git add -u
+       ) &&
+       cat >expect <<-\EOF &&
+       check
+       top
+       EOF
+       git diff-files --name-only >actual &&
+       test_cmp expect actual
+'
+
 test_expect_success SYMLINKS 'replace a file with a symlink' '
 
        rm foo &&