If you're like me and are using MVVMLight to build Windows Phone apps, you probably want to unit test your ViewModels as well. One of the benefits of the MVVM pattern is the separation of concerns between the View (page holding the xaml layout and bindings) and the ViewModel which holds the data to be bound. This allows the ViewModel to be easily testable, or so they say. In the end, it is quite difficult to find some useable tutorial doing exactly that. To the point you might ask yourself : " do ......