test_description='difference in submodules'
. ./test-lib.sh
-. ../diff-lib.sh
+. "$TEST_DIRECTORY"/diff-lib.sh
_z40=0000000000000000000000000000000000000000
test_expect_success setup '
test_cmp expect actual.files
'
+test_expect_success 'git diff (empty submodule dir)' '
+ : >empty &&
+ rm -rf sub/* sub/.git &&
+ git diff > actual.empty &&
+ test_cmp empty actual.empty
+'
+
test_done