--- /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 => 2;
+
+use MARC::Record;
+use MARC::Field;
+use MARC::File::XML;
+use C4::Heading;
+use C4::Linker::FirstMatch;
+use Test::MockModule;
+use t::lib::Mocks qw( mock_preference );
+use t::lib::TestBuilder;
+
+BEGIN {
+ use_ok('C4::Linker');
+}
+
+# Mock C4::Heading->authorities() so tests will all pass.
+# This completely bypasses any search engine calls.
+my $authid=0;
+my $mock_heading = Test::MockModule->new('C4::Heading');
+$mock_heading->mock( authorities => sub { return [ { authid => $authid++ } ]; } );
+
+my $builder = t::lib::TestBuilder->new();
+my $schema = $builder->schema();
+$schema->storage->txn_begin;
+
+subtest 'Test caching in get_link and update_cache' => sub {
+ plan tests => 6;
+
+ my @tags = C4::Context->preference('marcflavour') eq 'UNIMARC' ? (601,'j',602,'a') : (650,'a',655,'a');
+
+ my $subject_field = MARC::Field->new($tags[0],0,2,$tags[1]=>'Science fiction');
+ my $subject_field2 = MARC::Field->new($tags[0],0,2,$tags[1]=>'Science fiction');
+ my $genre_field = MARC::Field->new($tags[2],0,2,$tags[3]=>'Science fiction');
+ # Can we build a heading from it?
+ my $subject_heading = C4::Heading->new_from_bib_field( $subject_field, q{} );
+ my $subject_heading2 = C4::Heading->new_from_bib_field( $subject_field, q{} );
+ my $genre_heading = C4::Heading->new_from_bib_field( $genre_field, q{} );
+
+
+ # Now test to see if C4::Linker can find it.
+ my $authmatch;
+ my $fuzzy;
+ my $linker = C4::Linker::Default->new();
+
+ $linker->get_link($subject_heading);
+ is( keys %{$linker->{cache}},1, "First term added to cache");
+
+ $linker->get_link($genre_heading);
+ is( keys %{$linker->{cache}},2, "Second (matching) term added to cache because of different type");
+
+ $linker->get_link($subject_heading2);
+ is( keys %{$linker->{cache}},2, "Third (matching) term not added to cache because of matching type");
+
+
+ $linker->update_cache($subject_heading,32);
+ is( $linker->{cache}->{$subject_heading->search_form.$subject_heading->auth_type}->{authid}, 32, "Linker cache is correctly updated by 'update_cache'");
+ my ( $authid, undef ) = $linker->get_link($subject_heading);
+ is( $authid, 32, "Correct id is retrieved from the cache" );
+ ( $authid, undef ) = $linker->get_link($genre_heading);
+ isnt( $authid, 32, "Genre term is not updated by update_cache");
+};
+
+$schema->storage->txn_rollback;