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 TestMatchSameValues()
{
DiscountByDate discount = new DiscountByDate(.1m, DateTime.Now);
DiscountByDate identicalDiscount = new DiscountByDate(discount);
Assert.IsTrue(discount.Equals(identicalDiscount));
}
public void TestMatchDifferentValues()
{
DiscountByDate discount = new DiscountByDate(.1m, DateTime.Now);
DiscountByDate differentDiscount = new DiscountByDate(.1m, DateTime.Today);
Assert.IsFalse(discount.Equals(differentDiscount));
}
public void TestMatchSameDateObject()
{
DiscountByDate discount = new DiscountByDate(.1m, DateTime.Now);
Assert.IsTrue(discount.Equals(discount));
}