--- /dev/null
+#!/usr/bin/perl
+
+# This file is part of Koha.
+#
+# Koha is free software; you can redistribute it and/or modify it
+# under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3 of the License, or
+# (at your option) any later version.
+#
+# Koha is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with Koha; if not, see <http://www.gnu.org/licenses>.
+
+use Modern::Perl;
+
+use Test::More tests => 1;
+use t::lib::TestBuilder;
+
+use Koha::Template::Plugin::To;
+
+my $schema = Koha::Database->new->schema;
+$schema->storage->txn_begin;
+
+my $builder = t::lib::TestBuilder->new;
+
+subtest 'json' => sub {
+ plan tests => 1;
+ my $patron = $builder->build_object(
+ {
+ class => 'Koha::Patrons',
+ value => {
+ borrowernotes => q|
+several
+lines|,
+ }
+ }
+ );
+ my $expected_escaped_notes = q|\\\\nseveral\\\\nlines|;
+ is( Koha::Template::Plugin::To->json( $patron->borrowernotes ), $expected_escaped_notes );
+};
+
+$schema->storage->txn_rollback;
+