Are there tools that do this? I saw https://github.com/AmadeusITGroup/Assistive-Webdriver but that appears to still make you quite 'explicitly' test whether #a11y has been "successfully bolted on as an afterthought", rather than asking "how would this site work when primarily seen through the lens of assistive technology?".
Of course this won't be perfect: it will still miss real problems both for users using assistive technologies and for ones that don't - but that is inherent in frontend tests.
Curious about experiences!