THE DAY I STARTED BELIEVING IN UNIT TESTS

Summary from the TLDR Web Dev newsletter

Initially skeptical about the value of unit tests, the author was assigned to create and run them for embedded software. After a year of successful runs, the tests suddenly started failing due to a race condition in the test framework's threading abstraction. This experience led the author to recognize the importance of unit tests in uncovering hidden defects, improving code quality, and adopting new development methodologies when necessary.