A keen developer writes a lot of unit tests to cover the code to use in production. Unfortunately, a component can sometimes be difficult to test because of its dependencies, and you would be tempted to give up. Hang on, Test Doubles are what you need to make a test easy to write.

Are you developing an application which uses API responses? Do you need an efficiently way to test the UI? UI testing with a mock API server is the solution to your problems.

Of course, Swift protocol extensions and default parameter values are great features. And they are always safe, aren’t they? Well, not really.

A maintainable component. Reusable. Just a dream? Maybe not. SOLID principles, may be the way.

Nowadays, the biggest challenge for an iOS developer is the craft of a robust application which must be easy to maintain, test and scale. In this article you will learn a reliable approach to achieve it.