public void CreateCustomersViewModel_Test()
{
// Arrange
var customersList = GenerateCustomers();
// Act
var customersVM = new CustomersViewModel(_container, _windowManager, _customerAccess);
customersVM.LoadCustomers_Run(); // Manually run LoadCustomers()
// Assert
Assert.IsType <CustomerModel>(customersVM.NewCustomer);
Assert.IsType <BindableCollection <CustomerModel> >(customersVM.Customers);
Assert.True(customersVM.Customers.Count == customersList.Count);
}