The problem is that unit tests aren't for today. My unit tests are half for today—they actually let me code faster and better—and half for next month, when I d

The problem is that unit tests aren't for today. My unit tests are half for today—they actually let me code faster and better—and half for next month, when I discover a much better way to do things and reorganize my code savagely. 3 years from now? That's just a bonus which lets me feel smug. The real payoff was immediate, and did not involve any virtuous self-discipline.