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 TestingTwoFreeRule()
{
const string rule = "buy two get one free";
const int expected = 1;
var gRule = new BuyOneGetOneRule(rule);
var saved = gRule.ProcessAmountSaved(4, 1);
Assert.AreEqual(expected, saved);
}
public void TestingTotalRule()
{
const string rule = "buy one get one for $2.00";
const int expected = 2;
var gRule = new BuyOneGetOneRule(rule);
var saved = gRule.ProcessAmountSaved(5, 3);
Assert.AreEqual(expected, saved);
}
public void TestingPercentRule()
{
const string rule = "buy one get one 50% off";
const decimal expected = (decimal) 0.50;
var gRule = new BuyOneGetOneRule(rule);
var saved = gRule.ProcessAmountSaved(3, 1);
Assert.AreEqual(expected, saved);
}