public void AddingRuleRange()
{
FizzBuzz fizzBuzz = new FizzBuzz();
fizzBuzz.AddRuleRange(new Dictionary <int, string>
{
{ 2, "Banana" },
{ 17, "Orange" },
});
Assert.AreEqual(true, fizzBuzz.IsRuleExistsFor(2));
Assert.AreEqual(true, fizzBuzz.IsRuleExistsFor(17));
}