Just getting a basic foothold here. I'm thinking about moving this to
RSpec, cuz I feel like the assertions are gonna get pretty specific
and groupable.
In 540ce08caa, I updated the Item class
to be more explicit about what fields are required, so this test would
fail in a more helpful way, instead of just crashing from `name` being
`nil` when trying to infer the Dyeworks info.
Now, we update the test to use Rails's standard "fixture" system to set
up a more-correct placeholder item, instead!
