public void TestGetTotalPriceAppliedDiscountIrrespectiveOfScannedOrder( )
{
var rules = TestAssistant.CreateRulesFromTexFile( );
var SKUAs = TestAssistant.StockKeepingUnits(4, "A", 50).ToList( );
var SKUBs = TestAssistant.StockKeepingUnits(5, "B", 30).ToList( );
var SKUCs = TestAssistant.StockKeepingUnits(1, "C", 20).ToList( );
var SKUDs = TestAssistant.StockKeepingUnits(2, "D", 15).ToList( );
// Apply discount rule to the product
ApplyDiscountToProducts(SKUAs, rules[0]);
ApplyDiscountToProducts(SKUBs, rules[1]);
var productInvent = SKUAs.Concat(SKUBs).Concat(SKUCs).Concat(SKUDs);
var checkOut = new Checkout(productInvent, new DiscountApplicator(rules));
var expected = 350;
List <StockKeepingUnit> shuffledList = new List <StockKeepingUnit>(productInvent);
TestAssistant.ShuffleStockKeepingUnitList(ref shuffledList);
foreach (var item in shuffledList)
{
checkOut.Scan(item.Name);
}
var actual = checkOut.GetTotalPrice( );
Assert.AreEqual(expected, actual);
}
public void TestGetTotalPriceAppliedDiscountToScannedProducts( )
{
var rules = TestAssistant.CreateRulesFromTexFile( );
var producInvent = TestAssistant.StockKeepingUnits(2, "C", 30).ToList( );
// Apply discount rule to the product
ApplyDiscountToProducts(producInvent, rules[1]);
var checkOut = new Checkout(producInvent, new DiscountApplicator(rules));
var expected = 45;
foreach (var item in producInvent)
{
checkOut.Scan(item.Name);
}
var actual = checkOut.GetTotalPrice( );
Assert.AreEqual(expected, actual);
// Repeat test again
producInvent = TestAssistant.StockKeepingUnits(8, "A", 50).ToList( );
// Apply discount rule to the product
ApplyDiscountToProducts(producInvent, rules[0]);
checkOut = new Checkout(producInvent, new DiscountApplicator(rules));
expected = 360;
foreach (var item in producInvent)
{
checkOut.Scan(item.Name);
}
actual = checkOut.GetTotalPrice( );
Assert.AreEqual(expected, actual);
}
public void TestDiscountIsAppliedIfNumberOfItemsIsThreeOrGreaterThanThree( )
{
List <CheckoutKata.Business.ISpecialPricingRule> rules = TestAssistant.CreateRulesFromTexFile( );
var wh = new GenericCalculator(rules[0]);
// Arrange
var disCountProduct = TestAssistant.StockKeepingUnits(3, "A", 50);
var expected = 130;
var actual = wh.ApplyDiscount(disCountProduct);
Assert.AreEqual(expected, actual);
disCountProduct = TestAssistant.StockKeepingUnits(5, "A", 50);
expected = 230;
actual = wh.ApplyDiscount(disCountProduct);
Assert.AreEqual(expected, actual);
disCountProduct = TestAssistant.StockKeepingUnits(10, "A", 50);
expected = 440;
actual = wh.ApplyDiscount(disCountProduct);
Assert.AreEqual(expected, actual);
}
public void TestNoDiscountAppliedIfNumberOfItemsIsLessThanThree( )
{
List <CheckoutKata.Business.ISpecialPricingRule> rules = TestAssistant.CreateRulesFromTexFile( );
var disCountProduct = TestAssistant.StockKeepingUnits(2, "A", 50);
var wh = new GenericCalculator(rules[0]);
var expected = 100;
var actual = wh.ApplyDiscount(disCountProduct);
Assert.AreEqual(expected, actual);
}
public void TestApplyDiscountReturnsZeroIfNoProductIsProcided( )
{
var rules = TestAssistant.CreateRulesFromTexFile( );
// Arrange
List <StockKeepingUnit> disCountProduct = null;
var wh = new GenericCalculator(rules[0]);
var expected = 0;
var actual = wh.ApplyDiscount(disCountProduct);
Assert.AreEqual(expected, actual);
// Now initialised with no item on the list
disCountProduct = new List <StockKeepingUnit>();
actual = wh.ApplyDiscount(disCountProduct);
Assert.AreEqual(expected, actual);
}
