public void AppliesDiscount_ToReleventProduct_ForMoreThanOneOneProduct()
{
// Arrange
var sut = new BuyXGetPercentageFree("Bread", "Beans", 2, 0.50m);
var _productsInCart = new List <ProductInCart>()
{
new ProductInCart()
{
Product = new Product("Beans", 1.30M), Quantity = 2
},
new ProductInCart()
{
Product = new Product("Bread", .80M), Quantity = 1
},
new ProductInCart()
{
Product = new Product("Apples", 1.00M), Quantity = 1
},
};
// Act
var result = sut.ApplyDiscount(_productsInCart);
// Assert
Assert.Single(result);
Assert.Equal(.40M, result.First().DiscountAmount);
}
public void AppliesNoDiscount_ForNonApplicableProduct()
{
// Arrange
var sut = new BuyXGetPercentageFree("Bread", "Beans", 2, 0.50m);
var _productsInCart = new List <ProductInCart>()
{
new ProductInCart()
{
Product = new Product("Milk", 1.30M), Quantity = 2
},
new ProductInCart()
{
Product = new Product("Bread", .80M), Quantity = 1
}
};
// Act
var result = sut.ApplyDiscount(_productsInCart);
// Assert
Assert.False(result.Any());
}
public void AppliesDiscount_BuyXGetYPercentageFree(int x, int quantityX, int quantityY, decimal percentage, decimal expected)
{
// Arrange
var sut = new BuyXGetPercentageFree("Bread", "Beans", x, percentage);
var _productsInCart = new List <ProductInCart>()
{
new ProductInCart()
{
Product = new Product("Beans", 1.30M), Quantity = quantityX
},
new ProductInCart()
{
Product = new Product("Bread", .80M), Quantity = quantityY
}
};
// Act
var result = sut.ApplyDiscount(_productsInCart);
// Assert
Assert.Single(result);
Assert.Equal(expected, result.First().DiscountAmount);
}
