"The fundamental problem of software testing… is that software has to handle many situations that the developer has never thought of or will never anticipate. This limits the value of testing, because if you had the foresight to write a test for a particular case, then you probably had the foresight to make the code handle that case too. This makes conventional testing great for catching regressions, but really terrible at catching all the “unknown unknowns” that life, the universe, and your endlessly creative users will throw at you." - Will Wilson
Think about this take:
"The fundamental problem of software testing… is that software has to handle many situations that the developer has never thought of or will never anticipate. This limits the value of testing, because if you had the foresight to write a test for a particular case, then you probably had the foresight to make the code handle that case too. This makes conventional testing great for catching regressions, but really terrible at catching all the “unknown unknowns” that life, the universe, and your endlessly creative users will throw at you." - Will Wilson