[WIP] Basic testing plugin for displaying test data

extensions/karma/ext_localconf.php

 <?php
 defined('TYPO3_MODE') or die('Access denied.');
+
+\TYPO3\CMS\Extbase\Utility\ExtensionUtility::configurePlugin(
+    'T3o.' . $_EXTKEY,
+    'KarmaControl',
+    [
+        'Manager' => 'test',
+    ],
+    [
+        'Manager' => 'test',
+    ]
+);

extensions/karma/ext_tables.php

@@ -6,3 +6,8 @@ defined('TYPO3_MODE') or die('Access denied.');
     'Configuration/TypoScript',
     'Karma Services'
 );
+
+/*
+ * FE Plugin
+ */
+\TYPO3\CMS\Extbase\Utility\ExtensionUtility::registerPlugin('T3o.' . $_EXTKEY, 'KarmaControl', 'Karma Manager');

html/typo3conf/ext/karma/Classes/Controller/ManagerController.php

+<?php
+
+namespace T3o\Karma\Controller;
+
+use T3o\Karma\Service\KarmaService;
+use TYPO3\CMS\Extbase\Domain\Repository\FrontendUserRepository;
+
+/***************************************************************
+ *  Copyright notice
+ *
+ *  (c) 2018
+ *  All rights reserved
+ *
+ *  This script is part of the TYPO3 project. The TYPO3 project is
+ *  free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  The GNU General Public License can be found at
+ *  http://www.gnu.org/copyleft/gpl.html.
+ *
+ *  This script is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  This copyright notice MUST APPEAR in all copies of the script!
+ ***************************************************************/
+
+class ManagerController extends \TYPO3\CMS\Extbase\Mvc\Controller\ActionController
+{
+    /**
+     * @var KarmaService
+     */
+    protected $karmaService;
+
+    /**
+     * @var FrontendUserRepository
+     */
+    protected $frontendUserRepository;
+
+    /**
+     * @param KarmaService $karmaService
+     */
+    public function injectKarmaService(KarmaService $karmaService)
+    {
+        $this->karmaService = $karmaService;
+    }
+
+    /**
+     * @param FrontendUserRepository $frontendUserRepository
+     */
+    public function injectFrontendUserRepository(FrontendUserRepository $frontendUserRepository)
+    {
+        $this->frontendUserRepository = $frontendUserRepository;
+    }
+
+
+    /**
+     * The test action
+     */
+    public function testAction() {
+        $frontendUser = $this->frontendUserRepository->findByUid(1);
+
+        $valueReturned = $this->karmaService->getImmutableKarmaForUser($frontendUser, true, true);
+
+        var_dump($valueReturned);
+    }
+
+}