Hands-On Mobile Development with .NET Core

Arrange, Act, and Assert

Without further ado, let's take a look at the first view model in our application and implement some unit tests for it. The products view model is a simple view model that, on initialization, loads the products data using the available service client. It exposes two properties, namely, the Items collection and the ItemTapped command. Using this information, we can identify the units.

The units of the application, can be identified by implementing simple stubs as shown in the following code:

 public class ListItemViewModel : BaseBindableObject {     public ListItemViewModel(IApiClient apiClient, INavigationService      navigationService)     {         //...Load products and initialize ItemTapped command     }      public ObservableCollection ...