public void GetDiscount_throws_null_argument_exception_when_passed_null_object() { // Arrrange var offer = new FreeMilkOffer(); // Assert Assert.Throws <ArgumentNullException>(() => offer.GetDiscount(null)); }
public void GetDiscount_returns_correct_dicscount_amount(int milkCount, decimal expected) { // Arrange var offer = new FreeMilkOffer(); var items = new List <IProduct>(); for (int i = 0; i < milkCount; i++) { items.Add(new Milk()); } // Act var result = offer.GetDiscount(items); // Assert Assert.Equal(expected, result); }