Improve PyInsane tests
Created by: rvandegrift
Hi Jerome,
These patches improve the PyInsane tests in a few ways:
- Tests no longer require a physical device to be available. If no device is found, the tests create a virtual device using the sane-test backend.
- Before running a test, ensure the backend supports what is being tested. i.e., if the backend can't do Lineart mode, skip the Lineart testing.
- Fix up the rawapi tests and reenable them, modulo one weird issue with SANE options that do nothing but crash. (I've emailed sane-devel to try to find out what's up with those; maybe there's a good fix)
Thanks, Ross