MDL-86564 mod_choice: Export a pix_icon in overview external

public/mod/choice/classes/courseformat/overview.php

@@ -17,6 +17,7 @@
 namespace mod_choice\courseformat;
 
 use cm_info;
+use core\output\pix_icon;
 use mod_choice\manager;
 use core\activity_dates;
 use core\output\action_link;
@@ -136,14 +137,13 @@ class overview extends \core_courseformat\activityoverviewbase {
         if ($status) {
             $statustext = get_string('answered', 'choice');
         }
-        $corerenderer = $this->rendererhelper->get_core_renderer();
         $submittedstatuscontent = "-";
         if ($status) {
-            $submittedstatuscontent = $corerenderer->pix_icon(
-                'i/checkedcircle',
-                $statustext,
-                'core',
-                ['class' => 'text-success'],
+            $submittedstatuscontent = new pix_icon(
+                pix: 'i/checkedcircle',
+                alt: $statustext,
+                component: 'core',
+                attributes: ['class' => 'text-success'],
             );
         }
         return new overviewitem(

public/mod/choice/tests/courseformat/overview_test.php

@@ -16,6 +16,7 @@
 
 namespace mod_choice\courseformat;
 
+use core\output\pix_icon;
 use core_courseformat\local\overview\overviewfactory;
 
 /**
@@ -49,8 +50,11 @@ final class overview_test extends \advanced_testcase {
             $this->assertNull($actionoverview['responded']);
         } else {
             $this->assertEquals($answered, $actionoverview['responded']->get_value());
+            $content = $actionoverview['responded']->get_content();
             if (!$answered) {
-                $this->assertEquals('-', $actionoverview['responded']->get_content());
+                $this->assertEquals('-', $content);
+            } else {
+                $this->assertInstanceOf(pix_icon::class, $content);
             }
         }
     }