public void Test_Nth_interval()
{
var intervals = new Intervals("1 3 5");
intervals.GetNthInterval(0).Should().Be("1");
intervals.GetNthInterval(1).Should().Be("3");
intervals.GetNthInterval(2).Should().Be("5");
}
public void Nth_interval_for_index_outside_of_range_should_throw()
{
var intervals = new Intervals("1 3 5");
Action act = () => intervals.GetNthInterval(3);
act.ShouldThrow <IndexOutOfRangeException>();
}