Test for MDL-52081

testforms.php

<?php
include "config.php";
require_once($CFG->libdir.'/formslib.php');

$PAGE->set_url(new moodle_url('/test.php'));
$PAGE->set_context(context_system::instance());


class test_form extends moodleform {

    /**
     * Form definition
     */
    public function definition() {
        $mform    = $this->_form;

        $mform->addElement('warning', 'insane', null, 'INSANE');

        $mform->addElement('submitlink', 'sl', 'SubmitLink');
        $mform->setType('sl', PARAM_RAW);

        $mform->addElement('htmleditor', 'test', 'Test');
        $mform->setType('test', PARAM_RAW);

        $obj = new stdClass();
        $obj->mainhtml = 'unknwon';
        $obj->rowhtml = 'unknown';
        $hubitems = array('unknown' => $obj);
        $mform->addElement('listing','huburl', '', '', array('items' => $hubitems,
            'showall' => get_string('showall', 'block_community'),
            'hideall' => get_string('hideall', 'block_community')));
        $mform->setDefault('huburl', 'unknown');

        $this->add_action_buttons();

    }
}



$form = new test_form();

echo $OUTPUT->header();
if ($data = $form->get_data()) {
    echo "<pre>";print_r($data); echo "</pre>";
}


$form->display();
echo $OUTPUT->footer();