/**
  * Converting a valid file.
  */
 public function test_xslt_transformer_valid()
 {
     $xslt_transformer = new Xslt_transformer('tests/test_resources/surveys/super_simple_survey.xml');
     $xslt_transformer->set_enketo_xslt_lib_location('./application/third_party/enketo-xslt/');
     $result = $xslt_transformer->get_transform_result_sxe();
     $errors = $xslt_transformer->get_errors();
     // Every error group should be empty.
     foreach ($errors as $error_group) {
         $this->assertEmpty($error_group);
     }
     $this->assertInstanceOf('SimpleXMLElement', $result);
 }