tvdijen / simplesamlphp-module-monitor

        $testResult = new TestResult($this->getCategory(), $this->getSubject());

        $threshold = $moduleConfig->getValue('certExpirationWarning', 28);

        if ($expiration < 0) {

            $testResult->setState(State::ERROR);

            $testResult->setMessage('Certificate has expired ' . $daysStr . ' ago');

        } else if ($expiration <= $threshold) {

            $testResult->setState(State::WARNING);

            $testResult->setMessage('Certificate will expire in ' . $daysStr);

        } else {

            $testResult->setState(State::OK);

            $testResult->setMessage('Certificate valid for another ' . $daysStr);

        }

        $testResult->addOutput($expiration, 'expiration');

        $this->setTestResult($testResult);

        $used = $size - disk_free_space($path);

        $free = round(100 - (($used / $size) * 100));

        if ($free >= 15) {

            $testResult->setMessage($free . '% free space');

            $testResult->setState(State::OK);

        } else if ($free < 5) {

            $testResult->setMessage('Critical: ' . $free . '% free space');

            $testResult->setState(State::ERROR);

        } else {

            $testResult->setMessage($free . '% free space');

            $testResult->setState(State::WARNING);

        }

        $testResult->addOutput($free, 'free_percentage');

        $this->setTestResult($testResult);