Some candidates to consider would be: number of unit tests vs number of system classes; rate of change of test creation; number of system classes; class/method/code lines ratios, and so on.
Some candidates to consider would be: number of unit tests vs number of system classes; rate of change of test creation; number of system classes; class/method/code lines ratios, and so on.
我们应当考虑一些候选值：单元测试的个数和系统类的个数之比；测试造成的改变的比率；系统类的个数；类/方法/代码的行数的比值等等。