https://www.openculture.com/2025/10/1100-works-of-art-by-georgia-okeeffe.html

Unit tests act as living documentation, showing code behavior, staying up-to-date with changes, and covering edge cases to improve code clarity and reliability.

• Unit tests explain code behavior

• Unit tests are always in sync with the code

• Unit tests cover edge cases

https://news.ycombinator.com/item?id=41871629