My experience doing integration testing with BATS was that it was complete misery (not the BATS project’s fault, I think it’s just inherent in the nature of the

My experience doing integration testing with BATS was that it was complete misery (not the BATS project’s fault, I think it’s just inherent in the nature of the thing). You REALLY want a real programming language for any kind of non trivial integration testing. Things like set up and tear down, checking outputs, and testing many-similar-but-not-identical cases gets hairy fast. Sure you CAN do it in bash but just because you can doesn't mean you should. When we rewrote our BATS tests in Go was a huge step forward for the project.