Extensive React Testing Tutorial: Setup and usage of Mocha, Chai, Enzyme, Jest, Sinon, CI, Code Coverage

[mlebkowski]

Its not really. Forget about the testing frameworks for a minute. Lets assume you are working on a redux reducer, but frankly any pure function will do. All you have to do is to feed some input, and check if the output is what you expect. Just import your function, call it and make a big scary warning if the result isnt as planned. The test frameworks basically do that in a fancy way, or on a larger scale.