Tests should be correct by inspection Tests require a different approach than normal code. We don't have tests for tests, so tests need to be correct by inspection -- and the main technique to achieve this is to get rid of the generality of the production code, and exercise only very narrow and specific scenarios. Decide what test to write The goal of testing is to increase confidence A test's purpose is to increase the confidence that you have in your program's correctness. The next test to ...
