public void FailOnPrecondition()
{
var discount = @"FOR BASKET WITH nonExistingProduct
APPLY 10% DISCOUNT TO jeans
APPLY 50% DISCOUNT TO jacket";
var basket = new Basket(new List <Product>
{
new Product("tshirt", 50),
new Product("jeans", 100),
new Product("jacket", 200)
});
var calculator = new Calculator();
Assert.Throws <InvalidOperationException>(() => calculator.ApplyDiscount(basket, discount));
}
public void ApplyDiscountToJeansOnly()
{
var discount = "APPLY 10% DISCOUNT TO jeans";
var basket = new Basket(new List <Product>
{
new Product("tshirt", 50),
new Product("jeans", 100),
new Product("jacket", 200)
});
var calculator = new Calculator();
calculator.ApplyDiscount(basket, discount);
Assert.Equal(350, basket.OriginalPrice);
Assert.Equal(10, basket.Discount);
Assert.Equal(340, basket.TotalPrice);
}
public void ApplyComplexDiscountSuccessfullyWithPrecondition()
{
var discount = @"FOR BASKET WITH tshirt
APPLY 10% DISCOUNT TO jeans
APPLY 50% DISCOUNT TO jacket";
var basket = new Basket(new List <Product>
{
new Product("tshirt", 50),
new Product("jeans", 100),
new Product("jacket", 200)
});
var calculator = new Calculator();
calculator.ApplyDiscount(basket, discount);
Assert.Equal(350, basket.OriginalPrice);
Assert.Equal(10 + 100, basket.Discount);
Assert.Equal(240, basket.TotalPrice);
}