Here’s a little bit of rcov love to ensure that your test suites are covering what they should be.
http://gist.github.com/206379
This should give you:
rake test:rcov
rake test:rcov:units
rake test:rcov:functionals
rake test:rcov:helpers
…with a tailored coverage report for each.
Hopefully this can give you a better idea of where your tests are lacking. As it turns out, despite my app having coverage [...]