public void CalculatePurchaseAmountWithDiscount_Should_Return_Correct_Sum(double purchaseAmount, double purchaseAmountWithDiscount)
{
// arrange
IDiscountService discountService = new DiscountService();
IReadOnlyCollection <DiscountSettings> settings = new List <DiscountSettings>()
{
new DiscountSettings()
{
Percentage = 1, MinAmount = 1000, MaxAmount = 1999
},
new DiscountSettings()
{
Percentage = 3, MinAmount = 2000, MaxAmount = 4999
},
new DiscountSettings()
{
Percentage = 4, MinAmount = 5000, MaxAmount = 9999
},
new DiscountSettings()
{
Percentage = 5, MinAmount = 10000, MaxAmount = null
}
};
discountService.SetDiscountSettings(settings);
var card = new DiscountCard();
card.AddAmountForDiscount(purchaseAmount);
// act
double result = discountService.CalculatePurchaseAmountWithDiscount(card, purchaseAmount);
// assert
Assert.Equal(purchaseAmountWithDiscount, result);
}