Well, that's one of the reasons why I sometimes myself writing unit tests for the 3rd-party library functions: did I read the docs right? What about some obviou

Well, that's one of the reasons why I sometimes myself writing unit tests for the 3rd-party library functions: did I read the docs right? What about some obvious yet still undocumented edge cases? With particularly convoluted APIs those tests sometimes actually end staying in the project's tree.