--- /dev/null
+#!/usr/bin/perl
+
+# Copyright 2014 Rijksmuseum
+#
+# 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, write to the Free Software Foundation, Inc.,
+# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+
+use Modern::Perl;
+
+use FindBin;
+use Test::More tests => 24;
+
+use Koha::XSLT_Handler;
+
+my $engine=Koha::XSLT_Handler->new;
+is( ref $engine, 'Koha::XSLT_Handler', 'Testing creation of handler object' );
+
+$engine->transform(''); #we passed no file at first time
+is( $engine->err, 1, 'Engine returns error on no file' );
+
+$engine->transform( '', 'thisfileshouldnotexist.%$#@' );
+is( $engine->err, 2, 'Engine returns error on bad file' );
+
+is( $engine->refresh( 'asdjhaskjh'), 0, 'Test on invalid refresh' );
+
+#check first test xsl
+my $path= $FindBin::Bin.'/XSLT_Handler/';
+my $xsltfile_1 = 'test01.xsl';
+is( -e $path.$xsltfile_1, 1, "Found my test stylesheet $xsltfile_1" );
+exit if !-e $path.$xsltfile_1;
+$xsltfile_1= $path.$xsltfile_1;
+
+#Testing not-xml strings (undef, empty, some text, malformed xml
+my $output= $engine->transform( undef, $xsltfile_1 );
+is( $engine->err, 7, 'Engine returns error on undefined text' );
+$output= $engine->transform( '', $xsltfile_1 );
+is( $engine->err, 5, 'Engine returns error on empty string' );
+$output= $engine->transform( 'abcdef', $xsltfile_1 );
+is( $engine->err, 5, 'Engine returns error on non-xml' );
+$output= $engine->transform( '<a></b>', $xsltfile_1 );
+is( $engine->err, 5, 'Engine returns error on malformed xml' );
+
+#Test not returning source on failure when asked for
+#Include passing do_not_return via constructor on second engine
+my $secondengine=Koha::XSLT_Handler->new( {
+ do_not_return_source => 'very_true',
+ some_unknown_attrib => 'just_for_fun',
+});
+$engine->do_not_return_source(1);
+$output= $engine->transform( '<a></b>', $xsltfile_1 );
+is( defined $output? 1: 0, 0, 'Engine respects do_not_return_source==1');
+$output= $secondengine->transform( '<a></b>', $xsltfile_1 );
+is( defined $output? 1: 0, 0, 'Second engine respects it too');
+undef $secondengine; #bye
+$engine->do_not_return_source(0);
+$output= $engine->transform( '<a></b>', $xsltfile_1 );
+is( defined $output? 1: 0, 1, 'Engine respects do_not_return_source==0');
+
+#Testing valid refresh now
+is( $engine->refresh($xsltfile_1), 1, 'Test on valid refresh' );
+#A second time (for all) should return 0 now
+is( $engine->refresh, 0, 'Test on repeated refresh' );
+
+#Testing a string that should not change too much
+my $xml_1=<<'EOT';
+<just_a_tagname>
+</just_a_tagname>
+EOT
+$output= $engine->transform( $xml_1, $xsltfile_1 );
+is( $engine->err, undef, 'Engine returned no error for xml_1' );
+is( index($output,'<just_a_tagname>')>0, 1, 'No real change expected for xml_1' ); #Just very simple check if the tag was still there
+
+#Test of adding a new datafield to rudimentary 'marc record'
+my $xml_2=<<'EOT';
+<?xml version="1.0" encoding="UTF-8"?>
+<collection>
+<record>
+<controlfield tag="001">1234</controlfield>
+<datafield tag="245" ind1="1" ind2="0"><subfield tag="a">My favorite title</subfield></datafield>
+</record>
+</collection>
+EOT
+$output= $engine->transform( $xml_2 );
+ #note: second parameter (file) not passed again
+is( $engine->err, undef, 'Engine returned no error for xml_2' );
+is( index($output,'I saw you')>0, 1, 'Saw the expected change for xml_2' ); #Just very simple check if new datafield was added
+
+#The second test xsl contains bad code
+my $xsltfile_2 = 'test02.xsl';
+is( -e $path.$xsltfile_2, 1, "Found my test stylesheet $xsltfile_2" );
+exit if !-e $path.$xsltfile_2;
+$xsltfile_2= $path.$xsltfile_2;
+
+$output= $engine->transform( $xml_2, $xsltfile_2 );
+is( $engine->err, 4, 'Engine returned error for parsing bad xsl' );
+is( defined($engine->errstr), 1, 'Error string contains text');
+
+#The third test xsl is okay again; main use is clearing two items from cache
+my $xsltfile_3 = 'test03.xsl';
+is( -e $path.$xsltfile_3, 1, "Found my test stylesheet $xsltfile_3" );
+exit if !-e $path.$xsltfile_3;
+$xsltfile_3= $path.$xsltfile_3;
+$output= $engine->transform( $xml_2, $xsltfile_3 );
+is( $engine->err, undef, 'Unexpected error on transform with third xsl' );
+is( $engine->refresh, 2, 'Final test on clearing cache' );
+
+#End of tests