An Assertive Tester at work sent me a direct message declaring that the two of us should decide which repository the tests should go into. They'd decided we were "the deciders" here since they saw themselves as the highest-ranking tester in their department, as I am in mine. For most technologies, it makes sense to host the tests in the same repository as the code. For a variety of very good reasons I'll go into below, the API and browser-level tests for our apps are all hosted in one big, sh...