public void CreateNewSequance_NegativeNumber(int count)
 {
     Assert.Throws <ArgumentOutOfRangeException>(() => Fibonacchi.CreateNewSequance(count));
 }
 public void CreateNewSequance_Number5(int count)
 {
     Assert.AreEqual(Fibonacchi.CreateNewSequance(count).ToArray(), new BigInteger[] { 0, 1, 1, 2, 3 });
 }