add tests for comment attacks
add tests for comment attacks

alexanderlz/redash,denisov-vlad/redash,getredash/redash,chriszs/redash,alexanderlz/redash,chriszs/redash,denisov-vlad/redash,denisov-vlad/redash,getredash/redash,chriszs/redash,getredash/redash,getredash/redash,denisov-vlad/redash,alexanderlz/redash,denisov-vlad/redash,getredash/redash,chriszs/redash,alexanderlz/redash