public void AddProductToCoffeeMachine()
{
CoffeeMachine coffeeMachine = new CoffeeMachine();
Product product = new Product("Coffee");
coffeeMachine.AddProduct(product);
Assert.AreEqual(coffeeMachine.GetProductById(product.ProductId), product, "Products must be equal");
}
public void AddProduct(Product product)
{
this.products.Add(product);
}