silverstripe / silverstripe-behat-extension

        $regex  = '/'.preg_quote($text, '/').'/ui';

        if(trim($negate)) {

            if (preg_match($regex, $actual)) {

                $message = sprintf(

                    'The text "%s" was found in the text of the "%s" region on the page %s.',

                    $text,

                    $region,

                    $this->getSession()->getCurrentUrl()

                );

                throw new \Exception($message);

            }

        } else {

            if (!preg_match($regex, $actual)) {

                $message = sprintf(

                throw new \Exception($message);

            }

        } else {

            if (!preg_match($regex, $actual)) {

                $message = sprintf(

                    'The text "%s" was not found anywhere in the text of the "%s" region on the page %s.',

                    $text,

                    $region,

                    $this->getSession()->getCurrentUrl()

                );

                throw new \Exception($message);

            }

        }

    }