If you're going with Fat Models and Thin Controllers, then the controller shouldn't be doing anything more than something standardized. You can probably reduce

If you're going with Fat Models and Thin Controllers, then the controller shouldn't be doing anything more than something standardized. You can probably reduce that code down to using inherited_resources (though with Rails 3, it's just as easy to roll your own). I don't know about HTML endpoints, but I test all my JSON and XML endpoints by sending fake Rack responses. They tend to be highly orthogonal and easily metaprogrammed.