public void Test3()
 {
     Assert.AreEqual(51, PlayingWithDigitsKata.DigPow(46288, 3));
 }
 public void Test1()
 {
     Assert.AreEqual(1, PlayingWithDigitsKata.DigPow(89, 1));
 }
 public void Test2()
 {
     Assert.AreEqual(-1, PlayingWithDigitsKata.DigPow(92, 1));
 }