MDL-69615 privacy: Use task trait for unit tests

admin/tool/dataprivacy/tests/task/task_test.php

@@ -16,6 +16,7 @@
 
 namespace tool_dataprivacy\task;
 
+use core\task\task_trait;
 use tool_dataprivacy\api;
 
 defined('MOODLE_INTERNAL') || die();
@@ -30,6 +31,8 @@ require_once(__DIR__ . '/../data_privacy_testcase.php');
  */
 class task_test extends \data_privacy_testcase {
 
+    use task_trait;
+
     /**
      * Test tearDown.
      */
@@ -215,17 +218,4 @@ class task_test extends \data_privacy_testcase {
         $this->assertCount(1, \tool_dataprivacy\api::get_data_requests($user->id,
                 [api::DATAREQUEST_STATUS_CANCELLED], [api::DATAREQUEST_TYPE_DELETE]));
     }
-
-    /**
-     * Helper to execute a particular task.
-     *
-     * @param string $task The task.
-     */
-    private function execute_task($task) {
-        // Run the scheduled task.
-        ob_start();
-        $task = \core\task\manager::get_scheduled_task($task);
-        $task->execute();
-        ob_end_clean();
-    }
 }