By now, most serious companies and projects use unittests.

• By now, most serious companies and projects use unittests.
• They are necessary but don’t treat them as sufficient
• Sometimes unittests are nothing more than compile tests, try to strive for more
• Aim for end to end functional tests, using an emulated environment that mirrors the real one as much as possible (I sent ‘2’ in the function, and it sent back ‘3’ is a very low bar).
• Try to use a real system instead of mocking it away, if possible
• They are great for testing on architectures the developer doesn’t own

Unittests