public void TestImmutabilityWhenChangingExpirationDate()
{
DiscountByDate original = new DiscountByDate(.1m, DateTime.Now);
DiscountByDate verifier = new DiscountByDate(original);
DiscountByDate extended = original.ExtendByDays(7);
Assert.IsFalse(original.Equals(extended));
Assert.IsTrue(original.Equals(verifier));
}
public void TestProductDiscountWithValidDiscountByDate()
{
ProductId prodOneId = new ProductId("1");
Product prodOne = new Product(prodOneId, 10m);
DiscountByDate discount = new DiscountByDate(.1m, DateTime.Now.AddDays(1));
decimal discountedPrice = prodOne.DiscountPrice(discount);
Assert.IsTrue(discountedPrice == 9m);
}
public DiscountByDate(DiscountByDate discount)
{
DiscountAmount = discount.DiscountAmount;
ExpirationDate = discount.ExpirationDate;
}
public decimal DiscountPrice(DiscountByDate discount)
{
return(discount != null && discount.ExpirationDate > DateTime.Now
? Price - (Price * discount.DiscountAmount)
: Price);
}
public DiscountByDate(DiscountByDate discount)
{
DiscountAmount = discount.DiscountAmount;
ExpirationDate = discount.ExpirationDate;
}
public void VerifyExtendedDate()
{
DiscountByDate original = new DiscountByDate(.1m, DateTime.Now);
DiscountByDate extended = original.ExtendByDays(7);
Assert.IsTrue(extended.ExpirationDate == original.ExpirationDate.AddDays(7));
}
public void TestMatchSameValues()
{
DiscountByDate discount = new DiscountByDate(.1m, DateTime.Now);
DiscountByDate identicalDiscount = new DiscountByDate(discount);
Assert.IsTrue(discount.Equals(identicalDiscount));
}
public void TestMatchSameDateObject()
{
DiscountByDate discount = new DiscountByDate(.1m, DateTime.Now);
Assert.IsTrue(discount.Equals(discount));
}
public void TestMatchDifferentValues()
{
DiscountByDate discount = new DiscountByDate(.1m, DateTime.Now);
DiscountByDate differentDiscount = new DiscountByDate(.1m, DateTime.Today);
Assert.IsFalse(discount.Equals(differentDiscount));
}