public void Tax20ShouldIncreasePriceAfterTax()
{
Product product = Product.Sample;
Tax tax = new Tax(20);
AffectPriceResult result = tax.ApplyTo(product.Price);
string expected = "Product price reported as $20.25 before tax and $24.30 after 20% tax";
Assert.AreEqual(expected, result.DescribeWith(product, tax));
}
public void Discount15ShouldDecreasePriceAfterTax()
{
Product product = Product.Sample;
Discount discount = new Discount(15);
AffectPriceResult result = discount.ApplyTo(product.Price);
string expected = "Discount: rate = 15%, amount = $3.04. Price: before = $20.25, after = $17.21";
Assert.AreEqual(expected, result.DescribeWith(product, discount));
}
public void NoneTaxShouldNotAffectPrice()
{
Product product = Product.Sample;
Tax tax = Tax.None;
AffectPriceResult result = tax.ApplyTo(product.Price);
string expected = "Product price reported as $20.25 before tax and $20.25 after 0% tax";
Assert.AreEqual(expected, result.DescribeWith(product, tax));
}
public void NoneDiscountShouldNotAffectPrice()
{
Product product = Product.Sample;
Discount discount = Discount.None;
AffectPriceResult result = discount.ApplyTo(product.Price);
string expected = "Discount: rate = 0%, amount = $0.00. Price: before = $20.25, after = $20.25";
Assert.AreEqual(expected, result.DescribeWith(product, discount));
}
