Laws of Software Engineering · Saying
Saying
Pesticide Paradox
Running the same tests over and over catches the same bugs. Different bugs go unnoticed.
How to use it. Pair your regular test suite with other methods, such as mutation testing, exploratory testing, and deliberate failures. Different methods find different problems.
How it gets misused. "We have 90% coverage" used as proof of quality. Coverage tells you what got tested. It does not tell you whether bugs exist.
Related
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Principle
Testing Pyramid
Have lots of small fast tests, fewer medium tests, very few big slow tests.
- Practice Test-Driven Development Write the test first. Write only enough code to make it pass. Refactor. Repeat.