What confidence would you have on written tests by the person who left long time ago? Having tests (somebody else wrote) could mislead you in believing they got your back.
I’m not sure what point you’re trying to make. This is clearly better than having no tests at all. It’s not like I’m flying blind, the tests are right there, and I can read through them. If the coverage isn’t good enough, I can always add more. And let’s not ignore the fact that the presence of tests in the first place means someone gave a damn.
