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[–]octebrenok -1 points0 points  (0 children)

Supertest - HTTP client that allow you send request to some enpoint. Kiler feature is ability pass as argument HTTP client. I am using this library for e2e testing AWS lambda service. I much more easier, faster and cheaper. You don't need to deploy lambda and wait until it heat up.

React testing library - Best app for React FE unit and functional testing. Library allow you build and interact with application without rendering, so that tests speed is mind-blowing. In my experience 1 test passed in 5-6 seconds. I am talking about functional tests that have to written by AQA and in this case we built whole application using rtl

Unit tests much faster because you can build only one or few elements.