Also, I'd tend to agree that testing model attributes is a bit OTT - it's very close to testing a constant... but, it really doesn't take that long, and if it p

Also, I'd tend to agree that testing model attributes is a bit OTT - it's very close to testing a constant... but, it really doesn't take that long, and if it provides a scaffold that makes it easier to write future unit tests on the model (eg, on a computed field), so much the better for a little nudge that encourages more test coverage...