unit testing - How do you test loggers? In PHP -

consider following class:

<?php  namespace eveonline\logging;  use log; use monolog\handler\streamhandler; use monolog\logger;  class eveloghandler {      public function requestlog($response, $filename) {         $streamhandler = new streamhandler(storage_path($filename), logger::info);         $loginstance   = log::getmonolog();          $loginstance->sethandlers(array($streamhandler));         $loginstance->addinfo('fetched', [$response->getstatuscode(), $response->getbody()->getcontents()]);         $response->getbody()->rewind();     }      public function messagelog($message, $filename) {         $streamhandler = new streamhandler(storage_path($filename), logger::info);         $loginstance   = log::getmonolog();          $loginstance->sethandlers(array($streamhandler));         $loginstance->addinfo('message', [$message]);     } } 

now used in library building log out guzzle responses , until have been mocking out class methods.

two things:

how test it? how test class? how verify file written or i?

second part , important storage_path laravel global function. library separate of laravel. intended used laravel. how around function ??