Cache tests. 
        {
                include_once './Services/Cache/classes/class.ilExampleCache.php';
                
                $get = $cache->getEntry("test_id");
                $stat = $cache->getLastAccessStatus();
                $value.= $stat."-".$get."-";
                
                $get = $cache->storeEntry("test_id", "test_value");
                $get = $cache->getEntry("test_id");
                $stat = $cache->getLastAccessStatus();
                $value.= $stat."-".$get."-";
                
                sleep(6);
                $get = $cache->getEntry("test_id");
                $stat = $cache->getLastAccessStatus();
                $value.= $stat."-".$get."-";
                
                $this->assertEquals("miss--hit-test_value-miss--", $value);
        }