MDL-67740 behat: Show info as collapsed at the acceptance testing page

The static information with the links to Behat documentation is quite
long an irrelevant for experienced developers returning to this page. No
need to waste the prominent screen place with it - better to offer it
only when needed via collapsible form section.

admin/tool/behat/renderer.php

@@ -44,13 +44,9 @@ class tool_behat_renderer extends plugin_renderer_base {
         global $CFG;
         require_once($CFG->libdir . '/behat/classes/behat_selectors.php');
 
-        $html = $this->generic_info();
-
-        // Form.
-        ob_start();
-        $form->display();
-        $html .= ob_get_contents();
-        ob_end_clean();
+        $html = $this->output->header();
+        $html .= $this->output->heading(get_string('pluginname', 'tool_behat'));
+        $html .= $form->render();
 
         if (empty($stepsdefinitions)) {
             $stepsdefinitions = get_string('nostepsdefinitions', 'tool_behat');
@@ -128,7 +124,9 @@ class tool_behat_renderer extends plugin_renderer_base {
      */
     public function render_error($msg) {
 
-        $html = $this->generic_info();
+        $html = $this->output->header();
+        $html .= $this->output->heading(get_string('pluginname', 'tool_behat'));
+        $html .= $this->generic_info();
 
         $a = new stdClass();
         $a->errormsg = $msg;
@@ -153,13 +151,7 @@ class tool_behat_renderer extends plugin_renderer_base {
      *
      * @return string
      */
-    protected function generic_info() {
-
-        $title = get_string('pluginname', 'tool_behat');
-
-        // Header.
-        $html = $this->output->header();
-        $html .= $this->output->heading($title);
+    public function generic_info() {
 
         // Info.
         $installurl = behat_command::DOCS_URL;
@@ -175,8 +167,7 @@ class tool_behat_renderer extends plugin_renderer_base {
         );
 
         // List of steps.
-        $html .= $this->output->box_start();
-        $html .= html_writer::tag('h3', get_string('infoheading', 'tool_behat'));
+        $html = $this->output->box_start();
         $html .= html_writer::tag('div', get_string('aim', 'tool_behat'));
         $html .= html_writer::start_tag('div');
         $html .= html_writer::start_tag('ul');

admin/tool/behat/steps_definitions_form.php

@@ -40,8 +40,14 @@ class steps_definitions_form extends moodleform {
      * @return void
      */
     public function definition() {
+        global $PAGE;
 
         $mform = $this->_form;
+        $output = $PAGE->get_renderer('tool_behat');
+
+        $mform->addElement('header', 'info', get_string('infoheading', 'tool_behat'));
+        $mform->setExpanded('info', false);
+        $mform->addElement('html', $output->generic_info());
 
         $mform->addElement('header', 'filters', get_string('stepsdefinitionsfilters', 'tool_behat'));