commit-graph tests: split up corrupt_graph_and_verify()

diff --git a/t/t6120-describe.sh b/t/t6120-describe.sh
index 7da57db17d8003824459c925369e26872c7e7567..ee5b03ee18ada34a7b8012d219cbb63c4bb7f256 100755 (executable)
--- a/t/t6120-describe.sh
+++ b/t/t6120-describe.sh
@@ -121,10 +121,9 @@ test_expect_success 'describe --contains defaults to HEAD without commit-ish' '
        test_cmp expect actual
 '
 
-: >err.expect
 check_describe tags/A --all A^0
 test_expect_success 'no warning was displayed for A' '
-       test_cmp err.expect err.actual
+       test_must_be_empty err.actual
 '
 
 test_expect_success 'rename tag A to Q locally' '
@@ -144,6 +143,12 @@ test_expect_success 'rename tag Q back to A' '
 test_expect_success 'pack tag refs' 'git pack-refs'
 check_describe A-* HEAD
 
+test_expect_success 'describe works from outside repo using --git-dir' '
+       git clone --bare "$TRASH_DIRECTORY" "$TRASH_DIRECTORY/bare" &&
+       git --git-dir "$TRASH_DIRECTORY/bare" describe >out &&
+       grep "^A-[1-9][0-9]\?-g[0-9a-f]\+$" out
+'
+
 check_describe "A-*[0-9a-f]" --dirty
 
 test_expect_success 'describe --dirty with --work-tree' '