Yes, this approach is ideal when you are one person working consistently on the same project, and have much of the design in your head, which is feasible when y

Yes, this approach is ideal when you are one person working consistently on the same project, and have much of the design in your head, which is feasible when you keep the code size small. It suffers when you have multiple people working simultaneously, or if you have to take a break before returning to the project. In those case, a secondary automated statement of what the system should do is quite useful.