Yesod has some [handy functions](https://github.com/yesodweb/yesod/blob/197ecb409fcc71d90cc353f13d6437ee73845a96/yesod-test/Yesod/Test.hs#L202-L207). My goal is to be able to do the equivalent to this [PHP example](https://github.com/Gizra/drupal-starter/blob/0ce1b43273fa1cf970e7e90138967a78287396d1/web/modules/custom/server_general/tests/src/ExistingSite/ServerGeneralParagraphCtaTest.php#L68-L72).