PPI\FrameworkTest\AppTest::runApp PHP Метод

    private function runApp($app, $request, $response)
    {
        ob_start();
        $response = $app->run($request, $response);
        $output = ob_get_clean();
        $this->assertInstanceOf('\\Symfony\\Component\\HttpFoundation\\Response', $response);
        return $output;
    }