When writing XML-RPC unit test cases is in large part an exercise in copy-and-paste, particularly for functions that affect lots of different kinds of objects (like netgroups).

It would be handy to have some simple helpers like create_user(uid=foo) that generates a user entry for the given uid, verifies that is ok, and returns. This will also centralize changes so that if/when these objects get updated to return different values we don't have to make updates to multiple test cases.

This would make it significantly easier to generate more complex and larger tests and be much more readable. See the nesting case for a negative example of readability due to the sheer number of entries required.