Code review comment for lp:~james-w/launchpad/fix-publishing-getbyid

Jelmer, the test fixture discussion in bzr may help in terms of giving
you some ideas.

launchpad already has a fixture supporting thing; it might need tweaking.

But basically, rather than one big factory, many small ones, to the
extent of one per thing you want to create, not one to create many
things.

-Rob