I have been interested in analytics tools for a while, especially when it’s applied to mobile development. Over the time, I saw many code mistakes when implementing an analytical solution. Some of them can be easily avoided when developer got the right insights, let’s see how.
Since Xcode 7, iOS developers can generate a code coverage for their app: a report showing which area of their app is covered by unit tests. However, this is isn’t always accurate, let’s see why you should not base your code health only on code coverage.
To be sure new code won’t break old one already implemented, it’s best practice to write unit tests. When it comes to app architectures, it can be a challenge to write those tests. Following an MVVM pattern, how to unit test a view and its viewModel? That’s what I would like to cover here using dependency injection.