X-Git-Url: http://www.git.stargrave.org/?a=blobdiff_plain;f=t%2Fhval.t;h=38605c6f16faf6e4b424af66a7306446a27334c7;hb=95bdac7f09c69036efed537a4d03d5bdd2ae4eb6;hp=bfc9a856f50ba83886388f34e57ad1f3fa91ddbe;hpb=cf439203c31836e4c48f632f902aa58db6924972;p=public-inbox.git

diff --git a/t/hval.t b/t/hval.t
index bfc9a856..38605c6f 100644
--- a/t/hval.t
+++ b/t/hval.t
@@ -1,9 +1,22 @@
-# Copyright (C) 2017-2018 all contributors <meta@public-inbox.org>
+# Copyright (C) 2017-2020 all contributors <meta@public-inbox.org>
 # License: AGPL-3.0+ <https://www.gnu.org/licenses/agpl-3.0.txt>
 use strict;
 use warnings;
 use Test::More;
-use_ok 'PublicInbox::Hval';
+use_ok 'PublicInbox::Hval', qw(to_attr);
+
+# reverse the result of to_attr
+sub from_attr ($) {
+	my ($str) = @_;
+	my $first = '';
+	if ($str =~ s/\AZ([a-f0-9]{2})//ms) {
+		$first = chr(hex($1));
+	}
+	$str =~ s!::([a-f0-9]{2})!chr(hex($1))!egms;
+	$str =~ tr!:!/!;
+	utf8::decode($str);
+	$first . $str;
+}
 
 my $ibx = {
 	-no_obfuscate_re => qr/(?:example\.com)\z/i,
@@ -47,4 +60,14 @@ my $s = "\0\x07\n";
 PublicInbox::Hval::src_escape($s);
 is($s, "\\0\\a\n", 'src_escape works as intended');
 
+foreach my $s ('Hello/World.pm', 'Zcat', 'hello world.c', 'Eléanor', '$at') {
+	my $attr = to_attr($s);
+	is(from_attr($attr), $s, "$s => $attr => $s round trips");
+}
+
+{
+	my $bad = to_attr('foo//bar');
+	ok(!$bad, 'double-slash rejected');
+}
+
 done_testing();