"Many of them will not even survive the process at all." That's the point, and I think everything else in this article stems from it. Unit tests are supposed t

"Many of them will not even survive the process at all." That's the point, and I think everything else in this article stems from it. Unit tests are supposed to be transient; you're supposed to be able to just ditch them and replace them when you ditch and replace the code they're testing. Functional tests, on the other hand, should be longer-lived.