Bug 41674: Add a test

Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
Signed-off-by: Pedro Amorim <pedro.amorim@openfifth.co.uk>

t/Koha/Plugins/LinkPref.t

@@ -0,0 +1,49 @@
+#!/usr/bin/env 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 <https://www.gnu.org/licenses>.
+
+use Modern::Perl;
+
+use Test::More tests => 2;
+use Test::NoWarnings;
+
+use Template;
+
+subtest 'Format syspref links' => sub {
+    plan tests => 2;
+
+    my $template = Template->new(
+        {
+            PLUGIN_BASE => 'Koha::Template::Plugin',
+        }
+    );
+
+    my $tt = <<EOF;
+[%- USE LinkPref %]
+[%- "OPACBaseURL" | html | \$LinkPref -%]
+EOF
+
+    my $output;
+    $template->process( \$tt, { CAN_user_parameters_manage_sysprefs => 0 }, \$output );
+    is( $output, '<span class="link_preference">OPACBaseURL</span>', 'Link to OPACBaseURL' );
+
+    $output = '';
+    $template->process( \$tt, { CAN_user_parameters_manage_sysprefs => 1 }, \$output );
+    is(
+        $output,
+        '<a class="link_preference" href="/cgi-bin/koha/admin/preferences.pl?op=search&ok=Search&searchfield=OPACBaseURL">OPACBaseURL</a>'
+    );
+};