public void ApplyTaxRule_RoundingTaxRule_RoundsToNearestWholeNumber()
{
//arrange
ITaxRule rule = new RoundingTaxRule();
double tax = 1.98;
double expectedTax = 2.00;
//act
double actualTax = rule.ApplyTaxRule(tax);
//assert
Assert.AreEqual(expectedTax, actualTax, "Rounding rule did not correctly round tax");
}
public void ApplyTaxRule_RoundingTaxRule_RoundsTaxValue()
{
//arrange
ITaxRule rule = new RoundingTaxRule();
double tax = 1.41;
double expectedTax = 1.45;
//act
double actualTax = rule.ApplyTaxRule(tax);
//assert
Assert.AreEqual(expectedTax, actualTax, "Rounding rule did not correctly round tax");
}
public void CalculateSingleTax_WithExemptTaxAndRoundingRule_CalculatesTaxValue()
{
//arrange
double price = 1.5;
ShoppingBasketItem item = new ShoppingBasketItem(new Product("test", price, ProductType.Medical));
double expectedTax = new RoundingTaxRule().ApplyTaxRule(new ExemptSalesTaxRate().CalculateTax(price));
//act
double actualTax = item.CalculateSingleItemTax();
//assert
Assert.AreEqual(expectedTax, actualTax, "Single item tax incorrectly calculated for item with exempt tax rate");
}
