I have recently created a small project called rocket (https://github.com/joernlenoch/rocket https://github.com/joernlenoch/rocket) to provide myself with a sim

I have recently created a small project called rocket (https://github.com/joernlenoch/rocket https://github.com/joernlenoch/rocket) to provide myself with a simple dependency injection module for exactly this reason. This is rather a starting point than a solution for your problem. But combined with some "fakers" and supplied testing frameworks this might remove some of the boilerplate.