public static function validate_test_profile(&$test_profile)
 {
     if ($test_profile->get_file_location() == null) {
         echo PHP_EOL . 'ERROR: The file location of the XML test profile source could not be determined.' . PHP_EOL;
         return false;
     }
     // Validate the XML against the XSD Schemas
     libxml_clear_errors();
     // Now re-create the pts_test_profile object around the rewritten XML
     $test_profile = new pts_test_profile($test_profile->get_identifier());
     $valid = $test_profile->validate();
     if ($valid == false) {
         echo PHP_EOL . 'Errors occurred parsing the main XML.' . PHP_EOL;
         pts_validation::process_libxml_errors();
         return false;
     }
     // Rewrite the main XML file to ensure it is properly formatted, elements are ordered according to the schema, etc...
     $test_profile_writer = new pts_test_profile_writer();
     $test_profile_writer->rebuild_test_profile($test_profile);
     $test_profile_writer->save_xml($test_profile->get_file_location());
     // Now re-create the pts_test_profile object around the rewritten XML
     $test_profile = new pts_test_profile($test_profile->get_identifier());
     $valid = $test_profile->validate();
     if ($valid == false) {
         echo PHP_EOL . 'Errors occurred parsing the main XML.' . PHP_EOL;
         pts_validation::process_libxml_errors();
         return false;
     } else {
         echo PHP_EOL . 'Test Profile XML Is Valid.' . PHP_EOL;
     }
     // Validate the downloads file
     $download_xml_file = $test_profile->get_file_download_spec();
     if (empty($download_xml_file) == false) {
         $writer = new pts_test_profile_downloads_writer();
         $writer->rebuild_download_file($test_profile);
         $writer->save_xml($download_xml_file);
         $downloads_parser = new pts_test_downloads_nye_XmlReader($download_xml_file);
         $valid = $downloads_parser->validate();
         if ($valid == false) {
             echo PHP_EOL . 'Errors occurred parsing the downloads XML.' . PHP_EOL;
             pts_validation::process_libxml_errors();
             return false;
         } else {
             echo PHP_EOL . 'Test Downloads XML Is Valid.' . PHP_EOL;
         }
         // Validate the individual download files
         echo PHP_EOL . 'Testing File Download URLs.' . PHP_EOL;
         $files_missing = 0;
         $file_count = 0;
         foreach (pts_test_install_request::read_download_object_list($test_profile) as $download) {
             foreach ($download->get_download_url_array() as $url) {
                 $stream_context = pts_network::stream_context_create();
                 stream_context_set_params($stream_context, array('notification' => 'pts_stream_status_callback'));
                 $file_pointer = fopen($url, 'r', false, $stream_context);
                 if ($file_pointer == false) {
                     echo 'File Missing: ' . $download->get_filename() . ' / ' . $url . PHP_EOL;
                     $files_missing++;
                 } else {
                     fclose($file_pointer);
                 }
                 $file_count++;
             }
         }
         if ($files_missing > 0) {
             return false;
         }
     }
     // Validate the parser file
     $parser_file = $test_profile->get_file_parser_spec();
     if (empty($parser_file) == false) {
         $writer = self::rebuild_result_parser_file($parser_file);
         $writer->saveXMLFile($parser_file);
         $parser = new pts_parse_results_nye_XmlReader($parser_file);
         $valid = $parser->validate();
         if ($valid == false) {
             echo PHP_EOL . 'Errors occurred parsing the results parser XML.' . PHP_EOL;
             pts_validation::process_libxml_errors();
             return false;
         } else {
             echo PHP_EOL . 'Test Results Parser XML Is Valid.' . PHP_EOL;
         }
     }
     // Make sure no extra files are in there
     $allowed_files = pts_validation::test_profile_permitted_files();
     foreach (pts_file_io::glob($test_profile->get_resource_dir() . '*') as $tp_file) {
         if (!is_file($tp_file) || !in_array(basename($tp_file), $allowed_files)) {
             echo PHP_EOL . basename($tp_file) . ' is not allowed in the test package.' . PHP_EOL;
             return false;
         }
     }
     return true;
 }