public void CalculatePrice_SameBook_NoDiscount()
{
var calculator = new BookCalculator();
var price = calculator.CalculatePrice(new[] { 1, 1 });
Assert.AreEqual(16m, price);
}
public void CalculatePrice_5Books_25PercentDiscount()
{
var calculator = new BookCalculator();
var price = calculator.CalculatePrice(new[] { 1, 2, 3, 4, 5 });
Assert.AreEqual(30m, price);
}
public void CalculatePrice_EmptyBasket()
{
var calculator = new BookCalculator();
var price = calculator.CalculatePrice(new int[0]);
Assert.AreEqual(0, price);
}
public void CalculatePrice_4Books_20PercentDiscount()
{
var calculator = new BookCalculator();
var price = calculator.CalculatePrice(new[] { 1, 2, 3, 4 });
Assert.AreEqual(25.6m, price);
}
public void CalculatePrice_2Sets_BestPrice()
{
var calculator = new BookCalculator();
var price = calculator.CalculatePrice(new[] { 1, 1, 2, 2, 3, 3, 4, 5 });
Assert.AreEqual(51.2m, price);
}
public void CalculatePrice_2SetOfBooks()
{
var calculator = new BookCalculator();
var price = calculator.CalculatePrice(new[] { 1, 1, 2, 3, 4, 5, 5 });
Assert.AreEqual(45.2m, price);
}
public void CalculatePrice_2Books_5PercentDiscount()
{
var calculator = new BookCalculator();
var price = calculator.CalculatePrice(new[] { 1, 2 });
Assert.AreEqual(15.2m, price);
}
public void CalculatePrice_1Book(int bookNumber)
{
var calculator = new BookCalculator();
var price = calculator.CalculatePrice(new [] { bookNumber });
Assert.AreEqual(8, price);
}