+sub test_filter {
+
+ my $f = $WebPAC::Input::Test::filter_coderef;
+ ok(ref($f) eq 'CODE', 'filter_coderef');
+
+ my ($field, $from, $to) = @_;
+ cmp_ok( $f->( $from, $field, 1 ), 'eq', $to, "filter $field |$from| -> |$to|" );
+}
+
+test_filter(200,
+ '^afoo^cbar^fbing : bong',
+ '^afoo. bar^fbing / bong',
+);
+
+# modify_file
+
+my $modify_file = "$abs_path/conf/modify/test.pl";
+
+ok($input->open(
+ path => "/and/another/fake/path",
+ modify_file => $modify_file,
+), "open (with modify_file $modify_file)");
+
+diag "regexps = ", dump($input->modify_file_regexps( $modify_file )) if ($debug);
+
+test_filter(200,
+ '^a foo ; bar = baz : zzz',
+ '^a foo^kbar^dbaz : zzz',
+);
+
+# empty subfield removal
+
+ok($input->open(
+ path => "/another/fake/path",
+ modify_records => {
+ 900 => {
+ '^a' => { '^e' => ' : ^e' },
+ },
+ 901 => {
+ '^a' => { 'foo' => 'baz' },
+ },
+ },
+), "open (with modify_records for empty subfields)");
+
+test_filter(900,
+ '^a^ebar',
+ '^a^ebar',
+);
+
+test_filter(900,
+ '^afoo^ebar',
+ '^afoo : ^ebar',
+);
+
+test_filter(901,
+ '^afoo^ebar',
+ '^abaz^ebar',
+);