I understand that there might be some cases that prefer a test. However, when communicating a guideline like this, it is better to make it simple. Otherwise, t

I understand that there might be some cases that prefer a test. However, when communicating a guideline like this, it is better to make it simple. Otherwise, then it would be equivalent to no guideline. A guideline like this isn't meant to cover 100% of the cases anyway. If there are exceptions, I simply tell them to add some tests.