After a couple of decades of development I must say I personally find integration tests more useful than unit tests I mostly only do unit tests for things whic

After a couple of decades of development I must say I personally find integration tests more useful than unit tests I mostly only do unit tests for things which are very "logic intensive" like a parser and such things. I think a good rule of thumb is if writing unit tests during development actually helps me with development the tests are probably also useful during the development cycle.