t3404 (rebase -i): introduce helper to check position of HEAD

diff --git a/t/t7401-submodule-summary.sh b/t/t7401-submodule-summary.sh
index d3c039f724c3a1247417b5fd29d6bd50a88f54be..294584452bbc3226e631ce0b81c546b04cd8d992 100755 (executable)
--- a/t/t7401-submodule-summary.sh
+++ b/t/t7401-submodule-summary.sh
@@ -66,10 +66,11 @@ EOF
 "
 
 commit_file sm1 &&
-cd sm1 &&
-git reset --hard HEAD~2 >/dev/null &&
-head3=$(git rev-parse --verify HEAD | cut -c1-7) &&
-cd ..
+head3=$(
+       cd sm1 &&
+       git reset --hard HEAD~2 >/dev/null &&
+       git rev-parse --verify HEAD | cut -c1-7
+)
 
 test_expect_success 'modified submodule(backward)' "
     git submodule summary >actual &&
@@ -227,4 +228,11 @@ test_expect_success 'fail when using --files together with --cached' "
     test_must_fail git submodule summary --files --cached
 "
 
+test_expect_success 'should not fail in an empty repo' "
+    git init xyzzy &&
+    cd xyzzy &&
+    git submodule summary >output 2>&1 &&
+    test_cmp output /dev/null
+"
+
 test_done