+my $field = MARC::Field->new( '650', ' ', '0', a => 'Uncles', x => 'Fiction' );
+my $heading = C4::Heading->new_from_bib_field($field);
+is($heading->display_form(), 'Uncles--Fiction', 'Display form generation');
+is($heading->search_form(), 'Uncles generalsubdiv Fiction', 'Search form generation');