We've all encountered at some point code that needs to do some API calls or read from the file system. It's a super bad idea to actually let the code make the real http requests or read from the file system during unit test. Let's see why and how we can get around these kind of issues.

React provides 3 major APIs for creating re-usable components. In this article we show you why you should prefer stateless functional components over the other ones and some best practices around using them efficiently

This articles continues the unit testing for beginners series by diving into some of the more advanced concepts when testing functions. You will learn what mocking and stubbing is, how to test functions involving timers and network calls

Testing should be simple. But if you're just starting out it can be a bit overwhelming deciding which test framework you should use, how to set it up, what are the techniques of testing the various components you will be developing.