public GroceryItemRule GetPricingRule(string ruleText)
{
GroceryItemRule rule;
if (ruleText.Contains("get")) //covers get one for
rule = new BuyOneGetOneRule(ruleText);
else if (ruleText.Contains("for")) //covers for $2.00
rule = new GroupRule(ruleText);
else
rule = new PercentOffRule(ruleText);
return rule;
}
public void TestingGroupDiscount()
{
const string rule = "three apples for $2.5";
const decimal expected = 0.50m;
var gRule = new GroupRule(rule);
var saved = gRule.ProcessAmountSaved(4, 1);
Assert.AreEqual(expected, saved);
}