@dolphin
Unit testing is a cross between interrogation and introspection.

It's like when your wife/gf asks you loads of questions about the girl you were talking to last night, most of them stupid edge cases, and you have to come up with decent answers (tests).

Shortly afterward you begin to introspect about future "other girl" interrogations and how you can defend against them and have answers ready, perhaps it even means changing your behavior to reduce certain risks (main code edit).

Upon mounting a successful defense, perhaps you even being to wonder about who you are as a person and start imagining about all of the "what ifs", what if I did cheat, what if she said we kissed and we didn't, what if I do actually like her. haha (either bin the unit test as it's too exposing, or scrap the project in search of something shinier)