Although it might be nice to create extensive tests for every method you write, you must decide how much you can actually do and whether the return will warrant the time you put in.

尽管为每个您撰写的方法创建多种测试是非常不错的，但您必须决定您实际能测试多少，结果是否能体现出您所投入的时间。

youdao

There needs to be an intersection between how much market risk you are willing to take and what amount of return you need to earn on your investments over time.

FORBES: Unbridled Optimism