public void ElementAtReturnsNthElementOfSequence()
{
FibonacciSequence.ElementAt(0).Should().Be(0);
FibonacciSequence.ElementAt(1).Should().Be(1);
FibonacciSequence.ElementAt(7).Should().Be(13);
FibonacciSequence.ElementAt(12).Should().Be(144);
FibonacciSequence.ElementAt(19).Should().Be(4181);
}
public void IsSequenceElementReturnsWhetherElementBelongsToSequence()
{
FibonacciSequence.IsSequenceElement(9).Should().Be(false);
FibonacciSequence.IsSequenceElement(501).Should().Be(false);
FibonacciSequence.IsSequenceElement(0).Should().Be(true);
FibonacciSequence.IsSequenceElement(144).Should().Be(true);
FibonacciSequence.IsSequenceElement(1597).Should().Be(true);
}
