public void Sum_Products_Correctly()
{
Mock<IDiscountHelper> mock = new Mock<IDiscountHelper>();
mock.Setup(m => m.ApplyDiscount(It.IsAny<decimal>()))
.Returns<decimal>(total=>total);
var target = new LinqValueCalculator(mock.Object);
// act
var result = target.ValueProducts(products);
// assert
Assert.AreEqual(products.Sum(e=>e.Price), result);
}
public void Pass_Through_Variable_Discounts()
{
// arrange
Mock<IDiscountHelper> mock = new Mock<IDiscountHelper>();
mock.Setup(m => m.ApplyDiscount(It.IsAny<decimal>())).Returns<decimal>(total => total);
mock.Setup(m => m.ApplyDiscount(It.Is<decimal>(v => v == 0))).Throws<System.ArgumentOutOfRangeException>();
mock.Setup(m => m.ApplyDiscount(It.Is<decimal>(v => v > 100))).Returns<decimal>(total => (total * 0.9M));
mock.Setup(m => m.ApplyDiscount(It.IsInRange<decimal>(10, 100,Range.Inclusive))).Returns<decimal>(total => total - 5);
var target = new LinqValueCalculator(mock.Object);
// act
decimal FiveDollarDiscount = target.ValueProducts(createProduct(5));
decimal TenDollarDiscount = target.ValueProducts(createProduct(10));
decimal FiftyDollarDiscount = target.ValueProducts(createProduct(50));
decimal HundredDollarDiscount = target.ValueProducts(createProduct(100));
decimal FiveHundredDollarDiscount = target.ValueProducts(createProduct(500));
// assert
Assert.AreEqual(5, FiveDollarDiscount, "$5 Fail");
Assert.AreEqual(5, TenDollarDiscount, "$10 Fail");
Assert.AreEqual(45, FiftyDollarDiscount, "$50 Fail");
Assert.AreEqual(95, HundredDollarDiscount, "$100 Fail");
Assert.AreEqual(450, FiveHundredDollarDiscount, "$500 Fail");
target.ValueProducts(createProduct(0));
}