// ----- Initialization public CustomerListViewModel_should() { _messengerServiceMock = new Mock <IMessenger>(); _customerListServiceMock = new Mock <ICustomerListService>(); _dialogServiceMock = new Mock <IDialogService>(); _customerListViewModel = new CustomerListViewModel(_messengerServiceMock.Object, _customerListServiceMock.Object, _dialogServiceMock.Object); _customerListServiceMock.Setup(x => x.GetCustomers()).Returns(INITIAL_CUSTOMERS); _customerListViewModel.Boot().Wait(); }