These sort of bugs are hard to find with unit tests. But it's still easy to test, to make sure it never happen again. I think it's called integration tests. It

These sort of bugs are hard to find with unit tests. But it's still easy to test, to make sure it never happen again. I think it's called integration tests. It can also be done with live testing, by checking all packages that lands on the public repository - if they include .git folder, passwords/keys, or other credentials.