As a matter of practice, I test drive the code that I write. I find it extremely helpful to have coverage around the (package) private methods because it allows me to break up the tests into more concise increments. I also find that when I need to expand the functionality that the process goes much quicker when I have tests around all methods that have business logic.
I do not have much concern around deleting previously written unit tests. If the tests are no longer needed then keeping them around provides no value, in fact it just creates extra noise.
I'm on board with all of this!
Like you, I have no problem with deleting code. I actually enjoy it in a weird way because I'm fairly minimalist in my daily life. That said, I could see why the accumulation of tests could prevent someone from scrapping old code.
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