add tests for rebasing of empty commits

diff --git a/t/t9350-fast-export.sh b/t/t9350-fast-export.sh
index 9320b4f94c25bf376a004c2c0d4451c0fd96f969..2471bc6777df58c222a96d4fc6e77d77e9e38703 100755 (executable)
--- a/t/t9350-fast-export.sh
+++ b/t/t9350-fast-export.sh
@@ -146,6 +146,12 @@ test_expect_success 'signed-tags=strip' '
 
 '
 
+test_expect_success 'signed-tags=warn-strip' '
+       git fast-export --signed-tags=warn-strip sign-your-name >output 2>err &&
+       ! grep PGP output &&
+       test -s err
+'
+
 test_expect_success 'setup submodule' '
 
        git checkout -f master &&