Well, I'm asking about this because I actually don't know the capabilities of the target device(s) for testing. Finding out what one or two devices can do is interesting, but it doesn't necessarily tell you what the lowest common denominator is.
As for test patterns, those look good to me (for NTSC naturally). I'd assume a "correct" device would show just green and blue on the top pattern and all three colors on the bottom pattern. But I suspect most devices would show all three colors on the top pattern and from what I've read, it's possible they'd even add black padding to the bottom pattern!