! grep "BAD signature from" actual
'
+test_expect_success 'custom `gpg.program`' '
+ write_script fake-gpg <<-\EOF &&
+ args="$*"
+
+ # skip uninteresting options
+ while case "$1" in
+ --status-fd=*|--keyid-format=*) ;; # skip
+ *) break;;
+ esac; do shift; done
+
+ case "$1" in
+ -bsau)
+ test -z "$LET_GPG_PROGRAM_FAIL" || {
+ echo "zOMG signing failed!" >&2
+ exit 1
+ }
+ cat >sign.file
+ echo "[GNUPG:] SIG_CREATED $args" >&2
+ echo "-----BEGIN PGP MESSAGE-----"
+ echo "$args"
+ echo "-----END PGP MESSAGE-----"
+ ;;
+ --verify)
+ cat "$2" >verify.file
+ exit 0
+ ;;
+ *)
+ echo "Unhandled args: $*" >&2
+ exit 1
+ ;;
+ esac
+ EOF
+
+ test_config gpg.program "$(pwd)/fake-gpg" &&
+ git commit -S --allow-empty -m signed-commit &&
+ test_path_exists sign.file &&
+ git show --show-signature &&
+ test_path_exists verify.file &&
+
+ test_must_fail env LET_GPG_PROGRAM_FAIL=1 \
+ git commit -S --allow-empty -m must-fail 2>err &&
+ grep zOMG err
+'
+
test_done