public void Generator_TotalItemCount_CorrectWithOneDigit()
{
var generator = new CombinationGenerator(StandardKeypad);
Assert.AreEqual(0, generator.TotalItemCount("0"));
Assert.AreEqual(0, generator.TotalItemCount("1"));
Assert.AreEqual(3, generator.TotalItemCount("2"));
Assert.AreEqual(3, generator.TotalItemCount("3"));
Assert.AreEqual(3, generator.TotalItemCount("4"));
Assert.AreEqual(3, generator.TotalItemCount("5"));
Assert.AreEqual(3, generator.TotalItemCount("6"));
Assert.AreEqual(4, generator.TotalItemCount("7"));
Assert.AreEqual(3, generator.TotalItemCount("8"));
Assert.AreEqual(4, generator.TotalItemCount("9"));
}
public void Generator_TotalItemCount_CorrectWithMoreDigits()
{
var generator = new CombinationGenerator(StandardKeypad);
Assert.AreEqual(0, generator.TotalItemCount("000"));
Assert.AreEqual(0, generator.TotalItemCount("101"));
Assert.AreEqual(3, generator.TotalItemCount("200"));
Assert.AreEqual(3, generator.TotalItemCount("113"));
Assert.AreEqual(3 * 3 * 3, generator.TotalItemCount("222"));
Assert.AreEqual(Math.Pow(3, 10), generator.TotalItemCount("5552224444"));
Assert.AreEqual(Math.Pow(4, 10), generator.TotalItemCount("7779997777"));
}
public void Generator_TotalItemCount_RequiresInputhoneNumber()
{
var generator = new CombinationGenerator(StandardKeypad);
generator.TotalItemCount(null);
}
