public void TestIncremental()
{
var sut = new TheCheckout(PricingRules());
sut.Scan('A');
Assert.That(sut.Items, Is.EquivalentTo(new Dictionary <char, int> {
{ 'A', 1 }
}));
sut.Scan('A');
Assert.That(sut.Items, Is.EquivalentTo(new Dictionary <char, int> {
{ 'A', 2 }
}));
sut.Scan('B');
Assert.That(sut.Items, Is.EquivalentTo(new Dictionary <char, int> {
{ 'A', 2 }, { 'B', 1 }
}));
}
private static int Price(string goods)
{
var pricingRules = PricingRules();
var sut = new TheCheckout(pricingRules);
var items = goods.ToCharArray();
foreach (var item in items)
{
sut.Scan(item);
}
return(sut.GetTotal());
}