(1) is easy, (2) not so much. Since usually the responder locator gives me this nasty "doit" function that isn't introspectable (unless it.func_closure[0].cell_contents.im_func counts as "introspection"), I'm not sure how to write that unit test.

I do have end-to-end tests for this, obviously: I would like to also have regular tests :)

thanks in advance
lvh