Example needed of fixture cleanup

[jinnatar]

With the way the example fixtures are built it's not obvious how to change to a yield & do cleanup -style fixture.
When testing against a real service even in a testing environment it becomes necessary to run cleanup code for guaranteeing clean results every time.

[awichmann-mintel]

Yeah. I think there is also a problem with the module scoped grpc_server fixture. This makes it impossible to clean up calls made to the servicer between individual test functions.

[curtiscook]

Old issue, but it looks like a couple of people ran into this, and it's more of a pytest question.

I would create an additional fixture and enable auto-use. This lets the fixture be attached to every test without adding an import.

Example:

@pytest.fixture(scope="function", autouse=True)
def cleanup_grpc() -> None:
  <cleanup code here (or yield then clean after)> 

Recreating the server for every test seems inefficient, so I think session or module is the appropriate scope. (This is similar to how setUp/tearDown work in UnitTest)