Testing

A good practice to keep in mind during application development is that you can never assume what kind of network conditions your users will be facing while using your application.  Some users could be on Wi-Fi, some of 4G - LTE, but most likely a lot of your users with be in conditions similar to 3G or an EDGE network, which can be a lot slower than Wi-Fi or 4G.  In these cases it is important to test your application to make sure that any assumptions you programmed into your logic during development do not provide a poor user experience in adverse network conditions.

Writing unit testing is a cornerstone of software development.  When developing mobile or desktop applications, unit testing becomes even more critical, as there is often vital business logic that needs to be validated.  Have you ever found yourself wondering; what makes a great unit test in Swift? What key components give my application enough testing coverage to make sure that everything works and nothing regresses when new code is added to my project?  If you have asked yourself these questions then you are not alone.  In fact, that is why I wanted to write this tutorial.