public void Total_Should_Be_0_When_1_of_2_Same_Products_Removed() {
ShoppingCart cart = new ShoppingCart("TEST");
Product p = new Product("SKU");
cart.AddItem(p);
cart.AddItem(p);
Assert.Equal(2, cart.TotalItems);
cart.RemoveItem(p);
Assert.Equal(0, cart.TotalItems);
}
public void Items_Count_Should_Be_0_When_SKU_Removed() {
ShoppingCart cart = new ShoppingCart("TEST");
Product p = new Product("SKU");
cart.AddItem(p, 1);
Assert.Equal(1, cart.Items.Count);
cart.RemoveItem("SKU");
Assert.Equal(0, cart.Items.Count);
}