public void CartItems_ContainsElements()
{
var cartServiceMock = new Mock <ICartService>();
cartServiceMock.Setup(m => m.GetCartItems()).Returns((new List <CartItem>
{
new CartItem {
Count = 1, Item = new FurnitureItem()
},
new CartItem {
Count = 3, Item = new FurnitureItem()
},
}).AsReadOnly());
var viewModel = new CartViewModel(cartServiceMock.Object);
viewModel.InitializeAsync();
Assert.IsNotNull(viewModel.CartItems);
Assert.IsTrue(viewModel.CartItems.Any());
}