1 files changed, 3 insertions, 0 deletions
diff --git a/t/hval.t b/t/hval.t
index a193c296..bfc9a856 100644
--- a/t/hval.t
+++ b/t/hval.t
@@ -43,5 +43,8 @@ is('foo-bar', PublicInbox::Hval::to_filename("foo   bar\nanother line\n"),
  is('foo.bar', PublicInbox::Hval::to_filename("foo....bar"),
          'to_filename squeezes -');
  
+my $s = "\0\x07\n";
+PublicInbox::Hval::src_escape($s);
+is($s, "\\0\\a\n", 'src_escape works as intended');
  
  done_testing();