Here is a repo designed to help people practise using Approval testing
techniques to create Approval testing based tests or update their current
asserts to be better at feeding back changes within an application:
https://github.com/mwinteringham/approval-testing-koans #EuroTestConf

Approval testing forces you to look at the entire output of your system under
test, where with unit tests you are actively choosing what to look for-which
means you can miss errors or unwanted changes. #EuroTestConf

Wrapping up the workshop on approval testing, it's a powerful tool, with some
caveats: #EuroTestConf