public void TestIncremental()
{
CheckOut co = new CheckOut(RULES);
Assert.AreEqual(0, co.total());
co.scan("A"); Assert.AreEqual(50.0, co.total());
co.scan("B"); Assert.AreEqual(80.0, co.total());
co.scan("A"); Assert.AreEqual(130.0, co.total());
co.scan("A"); Assert.AreEqual(160.0, co.total());
co.scan("B"); Assert.AreEqual(175.0, co.total());
}
private Double price(String goods)
{
CheckOut co = new CheckOut(RULES);
for (int i = 0; i < goods.Length; i++)
{
co.scan(goods[i].ToString());
}
return co.total();
}