public void TestScanItemsAreTract( )
{
// Arrange
var initialPrice = 50;
var repo = TestAssistant.StockKeepingUnits(3, "A", initialPrice);
var checkOut = new Checkout(repo, null);
// Act
foreach (var item in repo)
{
checkOut.Scan(item.Name);
}
//Assert
Assert.IsTrue(repo.Count( ) == checkOut.NumberOfScanItems);
// Arrange
repo = TestAssistant.StockKeepingUnits(15, "C", initialPrice);
checkOut = new Checkout(repo, null);
var itemsToscan = repo.Take(5).ToList( );
// Act
itemsToscan.ForEach(x => checkOut.Scan(x.Name));
//Assert
Assert.IsTrue(5 == checkOut.NumberOfScanItems);
}
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 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 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 TestIfNoPromoGetPromoRulesReturnsEmptyList( )
{
var ruleFile = TestAssistant.GetPromoRuleFileNameFromAppConfig( );
File.AppendAllText(ruleFile, string.Empty);
var ruleFactory = new ComaSeparatedFileSpecialPricingRuleFactory(ruleFile);
var rules = ruleFactory.GetPromoRules( );
Assert.IsNotNull(rules);
Assert.IsTrue(0 == rules.Count( ));
}
public void TestGetTotalPriceReturnsTotalPriceOfAllScanItems( )
{
var producInvent = TestAssistant.StockKeepingUnits(5, "C", 30);
var checkOut = new Checkout(producInvent, new DiscountApplicator(null));
var expected = 150;
foreach (var item in producInvent)
{
checkOut.Scan(item.Name);
}
var actual = checkOut.GetTotalPrice( );
Assert.AreEqual(expected, actual);
}
public void TestReadFileReturnsAllLineRead( )
{
var goodFileName = TestAssistant.GetFileNameFromAppConfig(GOODFILENAMEKEY);
File.AppendAllText(goodFileName, TEXTTOWRITE);
var linesRead = FileReader.ReadFile(goodFileName);
File.Delete(goodFileName);
Assert.IsNotNull(linesRead);
Assert.AreEqual(1, linesRead.Length);
Assert.IsTrue(linesRead[0].Equals(TEXTTOWRITE));
}
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 TestGetTotalPriceReturnsZeroIfNoItemScan( )
{
var producInvent = TestAssistant.StockKeepingUnits(5, "C", 30);
var checkOut = new Checkout(producInvent, null);
var expected = 0;
var actual = checkOut.GetTotalPrice( );
Assert.AreEqual(expected, actual);
// Now scan an item that is not in the invetory
checkOut.Scan("B");
actual = checkOut.GetTotalPrice( );
Assert.AreEqual(expected, actual);
}
public void TestScannedItemsAreClearedWhenGetTotalPriceIsCalled( )
{
// Arrange
var repo = TestAssistant.StockKeepingUnits(15, "A", 30);
var checkOut = new Checkout(repo, new DiscountApplicator(null));
var itemsToscan = repo.Take(3).ToList( ); // Lets scan 3 items first
// Act
itemsToscan.ForEach(x => checkOut.Scan(x.Name));
Assert.IsTrue(3 == checkOut.NumberOfScanItems);
// now clear get the total price
checkOut.GetTotalPrice( );
Assert.IsTrue(0 == checkOut.NumberOfScanItems);
}
public void TestGetPromoRulesReturnsListOfInitialisedRules( )
{
var ruleFile = TestAssistant.GetPromoRuleFileNameFromAppConfig( );
var allLines = new List <string>( )
{
PROMORULEHEADER, RULEONE, RULETWO
};
File.AppendAllLines(ruleFile, allLines);
var ruleFactory = new ComaSeparatedFileSpecialPricingRuleFactory(ruleFile);
var rules = ruleFactory.GetPromoRules( );
File.Delete(ruleFile);
Assert.IsNotNull(rules);
Assert.IsTrue(2 == rules.Count( )); // We should expected 2 rules excluding the header
}
/// <summary>
/// Get rules
/// </summary>
/// <returns></returns>
public static List <CheckoutKata.Business.ISpecialPricingRule> CreateRulesFromTexFile( )
{
var ruleFile = TestAssistant.GetPromoRuleFileNameFromAppConfig( );
var allLines = new List <string>( )
{
PROMORULEHEADER, RULEONE, RULETWO
};
// Write the promotion rules to the file
File.AppendAllLines(ruleFile, allLines);
var ruleFactory = new ComaSeparatedFileSpecialPricingRuleFactory(ruleFile);
File.Delete(ruleFile);
// Any test calling this will fail if the an exception is thrown whist tring to get the List of promo rules.
// Its ok, as it is a test. It will force the engineer to debug why their test is failing
return(ruleFactory.GetPromoRules( ).ToList( ));
}
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);
}
