public FibonacciNumber GetNext(FibonacciNumber number)
{
numberValidator.EnsureValid(number);
return(new FibonacciNumber
(
index: number.Index + 1,
value: fibonacciAlgorithm.Get(number.Index - 1) + number.Value
));
}
public void Get_ValidArgument(BigInteger n, BigInteger expectedResult)
{
var actualResult = fibonacciAlgorithm.Get(n);
actualResult.Should().Be(expectedResult);
}