public void TestBasketWithMultipleQualifyingDistcountProductWithMultipleSameProductOddNumber()
{
// arrange
decimal expectedValue = 3.05M;
var products = new List <string>();
products.Add("A99");
products.Add("B15");
products.Add("A99");
products.Add("A99");
products.Add("B15");
products.Add("A99");
products.Add("A99");
products.Add("B15");
var engine = new CheckoutEngine();
// act
var checkoutEngine = new CheckoutEngine();
var result = checkoutEngine.CalculateBasket(products);
// assert
Assert.AreEqual(expectedValue, result);
}
public void TestNullProductList()
{
// arrange
var expectedError = "Products cannot be null or empty.";
try
{
// act
var checkoutEngine = new CheckoutEngine();
var result = checkoutEngine.CalculateBasket(null);
}
catch (ArgumentException ex)
{
// assert
Assert.AreEqual(expectedError, ex.ParamName);
}
}
public void TestBasketWithUnknownProduct()
{
// arrange
decimal expectedValue = 0.00M;
var products = new List <string>();
products.Add("A88");
var engine = new CheckoutEngine();
// act
var checkoutEngine = new CheckoutEngine();
var result = checkoutEngine.CalculateBasket(products);
// assert
Assert.AreEqual(expectedValue, result);
}
public void TestBasketWithNoQualifyingDiscountProduct()
{
// arrange
decimal expectedValue = 3.29M;
var products = new List <string>();
products.Add("A99");
products.Add("C40");
products.Add("T23");
var engine = new CheckoutEngine();
// act
var checkoutEngine = new CheckoutEngine();
var result = checkoutEngine.CalculateBasket(products);
// assert
Assert.AreEqual(expectedValue, result);
}
public async Task <decimal> CalculateBasket(List <string> products)
{
var checkoutEngine = new CheckoutEngine();
return(await Task.FromResult(checkoutEngine.CalculateBasket(products)));
}