public void CashRegister_NegativeAmount_ShouldThrowException()
{
double input = -100;
var cashRegister = new CashRegister();
var denominationArray = new List<double>() { 100, 50, 20, 10, 5, 1, .25, .10, .05, .01 };
var output = cashRegister.GetChange(input, denominationArray);
}
public void CashRegister_DollarAmount_ReturnCorrectChange()
{
double input = 289.42;
Dictionary<double, int> expected = new Dictionary<double, int>() {
{100, 2},
{50, 1},
{20, 1},
{10, 1},
{5, 1},
{1, 4},
{.25, 1},
{.10, 1},
{.05, 1},
{.01, 2}
};
var cashRegister = new CashRegister();
var denominationArray = new List<double>() { 100, 50, 20, 10, 5, 1, .25, .10, .05, .01 };
var output = cashRegister.GetChange(input, denominationArray);
CollectionAssert.AreEqual(expected, output);
}