public function init()
 {
     if (false == Zetta_Acl::getInstance()->isAllowed('admin_module_guitestcase')) {
         throw new Exception('Access Denied');
     }
     $this->_helper->getHelper('AjaxContext')->addActionContext('index', 'html')->addActionContext('run', 'html')->addActionContext('runall', 'html')->initContext();
     $this->_testCases = Modules_Guitestcase_Framework_Manager::getInstance()->getTestCaseClasses();
 }