[zdragnar]

You don't need a test for every function. You probably want every function call covered by a test, though, otherwise you have untested code.

The exact granularity is a debate that has gone on for a long time. Nowadays, people seem to prefer larger tests that cover more code in one go so as to avoid lots of mocking / stubbing. Super granular tests tend to be reserved for libraries with no internal state.

[epgui]

While what you say could be argued, this is both an insufficient argument against, and irrelevant to, the post you’re commenting on.