I understand that if go code is structured such that it's programmed to interfaces, it's trivial to mock; however, I'm working with a code base that I cannot change (that is not mine) and this is not the case.
This code base is heavily interconnected and nothing is programmed to an interface, only structs, so no dependency injection.
The structs, themselves, only contain other structs, so I can't mock out that way either. I don't believe that I can do anything about methods, and the few functions that exist are not variables, so there's no way that I know of to swap them out. Inheritance isn't a thing in golang, so that's a no go as well.
In scripting languages like python, we can modify the objects at runtime, aka monkey patch. Is there something comparable that I can do in golang? Trying to figure out some way to test/benchmark without touching the underlying code.
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